4155 lines
116 KiB
C
4155 lines
116 KiB
C
/*
|
||
* tkImgPhoto.c --
|
||
*
|
||
* Implements images of type "photo" for Tk. Photo images are
|
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* stored in full color (24 bits per pixel) and displayed using
|
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* dithering if necessary.
|
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*
|
||
* Copyright (c) 1994 The Australian National University.
|
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
|
||
*
|
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* See the file "license.terms" for information on usage and redistribution
|
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
||
*
|
||
* Author: Paul Mackerras (paulus@cs.anu.edu.au),
|
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* Department of Computer Science,
|
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* Australian National University.
|
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*
|
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* SCCS: @(#) tkImgPhoto.c 1.60 97/08/08 11:32:46
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||
*/
|
||
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#include "tkInt.h"
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#include "tkPort.h"
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||
#ifdef STk_CODE
|
||
# include <math.h>
|
||
#else
|
||
# include "tclMath.h"
|
||
#endif
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||
#include <ctype.h>
|
||
|
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/*
|
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* Declaration for internal Xlib function used here:
|
||
*/
|
||
|
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extern _XInitImageFuncPtrs _ANSI_ARGS_((XImage *image));
|
||
|
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/*
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* A signed 8-bit integral type. If chars are unsigned and the compiler
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* isn't an ANSI one, then we have to use short instead (which wastes
|
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* space) to get signed behavior.
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||
*/
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|
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#if defined(__STDC__) || defined(_AIX)
|
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typedef signed char schar;
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#else
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# ifndef __CHAR_UNSIGNED__
|
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typedef char schar;
|
||
# else
|
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typedef short schar;
|
||
# endif
|
||
#endif
|
||
|
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/*
|
||
* An unsigned 32-bit integral type, used for pixel values.
|
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* We use int rather than long here to accommodate those systems
|
||
* where longs are 64 bits.
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||
*/
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typedef unsigned int pixel;
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/*
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||
* The maximum number of pixels to transmit to the server in a
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* single XPutImage call.
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*/
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||
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#define MAX_PIXELS 65536
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/*
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* The set of colors required to display a photo image in a window depends on:
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* - the visual used by the window
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* - the palette, which specifies how many levels of each primary
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* color to use, and
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* - the gamma value for the image.
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*
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* Pixel values allocated for specific colors are valid only for the
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* colormap in which they were allocated. Sets of pixel values
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* allocated for displaying photos are re-used in other windows if
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* possible, that is, if the display, colormap, palette and gamma
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* values match. A hash table is used to locate these sets of pixel
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* values, using the following data structure as key:
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*/
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typedef struct {
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Display *display; /* Qualifies the colormap resource ID */
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Colormap colormap; /* Colormap that the windows are using. */
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double gamma; /* Gamma exponent value for images. */
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Tk_Uid palette; /* Specifies how many shades of each primary
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* we want to allocate. */
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} ColorTableId;
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||
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/*
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* For a particular (display, colormap, palette, gamma) combination,
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* a data structure of the following type is used to store the allocated
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* pixel values and other information:
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*/
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typedef struct ColorTable {
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ColorTableId id; /* Information used in selecting this
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* color table. */
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int flags; /* See below. */
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int refCount; /* Number of instances using this map. */
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int liveRefCount; /* Number of instances which are actually
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* in use, using this map. */
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int numColors; /* Number of colors allocated for this map. */
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XVisualInfo visualInfo; /* Information about the visual for windows
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* using this color table. */
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pixel redValues[256]; /* Maps 8-bit values of red intensity
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* to a pixel value or index in pixelMap. */
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pixel greenValues[256]; /* Ditto for green intensity */
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pixel blueValues[256]; /* Ditto for blue intensity */
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unsigned long *pixelMap; /* Actual pixel values allocated. */
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unsigned char colorQuant[3][256];
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/* Maps 8-bit intensities to quantized
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* intensities. The first index is 0 for
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* red, 1 for green, 2 for blue. */
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} ColorTable;
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/*
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* Bit definitions for the flags field of a ColorTable.
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* BLACK_AND_WHITE: 1 means only black and white colors are
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* available.
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* COLOR_WINDOW: 1 means a full 3-D color cube has been
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* allocated.
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* DISPOSE_PENDING: 1 means a call to DisposeColorTable has
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* been scheduled as an idle handler, but it
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* hasn't been invoked yet.
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* MAP_COLORS: 1 means pixel values should be mapped
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* through pixelMap.
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*/
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#define BLACK_AND_WHITE 1
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#define COLOR_WINDOW 2
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#define DISPOSE_PENDING 4
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#define MAP_COLORS 8
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/*
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* Definition of the data associated with each photo image master.
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*/
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typedef struct PhotoMaster {
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Tk_ImageMaster tkMaster; /* Tk's token for image master. NULL means
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* the image is being deleted. */
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Tcl_Interp *interp; /* Interpreter associated with the
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* application using this image. */
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Tcl_Command imageCmd; /* Token for image command (used to delete
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* it when the image goes away). NULL means
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* the image command has already been
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* deleted. */
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int flags; /* Sundry flags, defined below. */
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int width, height; /* Dimensions of image. */
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int userWidth, userHeight; /* User-declared image dimensions. */
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Tk_Uid palette; /* User-specified default palette for
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* instances of this image. */
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double gamma; /* Display gamma value to correct for. */
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char *fileString; /* Name of file to read into image. */
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char *dataString; /* String value to use as contents of image. */
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char *format; /* User-specified format of data in image
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* file or string value. */
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unsigned char *pix24; /* Local storage for 24-bit image. */
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int ditherX, ditherY; /* Location of first incorrectly
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* dithered pixel in image. */
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TkRegion validRegion; /* Tk region indicating which parts of
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* the image have valid image data. */
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struct PhotoInstance *instancePtr;
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/* First in the list of instances
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* associated with this master. */
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} PhotoMaster;
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/*
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* Bit definitions for the flags field of a PhotoMaster.
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* COLOR_IMAGE: 1 means that the image has different color
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* components.
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* IMAGE_CHANGED: 1 means that the instances of this image
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* need to be redithered.
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*/
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#define COLOR_IMAGE 1
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#define IMAGE_CHANGED 2
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/*
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* The following data structure represents all of the instances of
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* a photo image in windows on a given screen that are using the
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* same colormap.
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*/
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typedef struct PhotoInstance {
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PhotoMaster *masterPtr; /* Pointer to master for image. */
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Display *display; /* Display for windows using this instance. */
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Colormap colormap; /* The image may only be used in windows with
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* this particular colormap. */
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struct PhotoInstance *nextPtr;
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/* Pointer to the next instance in the list
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* of instances associated with this master. */
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int refCount; /* Number of instances using this structure. */
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Tk_Uid palette; /* Palette for these particular instances. */
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double gamma; /* Gamma value for these instances. */
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Tk_Uid defaultPalette; /* Default palette to use if a palette
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* is not specified for the master. */
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ColorTable *colorTablePtr; /* Pointer to information about colors
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* allocated for image display in windows
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* like this one. */
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Pixmap pixels; /* X pixmap containing dithered image. */
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int width, height; /* Dimensions of the pixmap. */
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schar *error; /* Error image, used in dithering. */
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XImage *imagePtr; /* Image structure for converted pixels. */
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XVisualInfo visualInfo; /* Information about the visual that these
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* windows are using. */
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GC gc; /* Graphics context for writing images
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* to the pixmap. */
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} PhotoInstance;
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/*
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* The following data structure is used to return information
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* from ParseSubcommandOptions:
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*/
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struct SubcommandOptions {
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int options; /* Individual bits indicate which
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* options were specified - see below. */
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char *name; /* Name specified without an option. */
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int fromX, fromY; /* Values specified for -from option. */
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int fromX2, fromY2; /* Second coordinate pair for -from option. */
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int toX, toY; /* Values specified for -to option. */
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int toX2, toY2; /* Second coordinate pair for -to option. */
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int zoomX, zoomY; /* Values specified for -zoom option. */
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int subsampleX, subsampleY; /* Values specified for -subsample option. */
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char *format; /* Value specified for -format option. */
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};
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/*
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* Bit definitions for use with ParseSubcommandOptions:
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* Each bit is set in the allowedOptions parameter on a call to
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* ParseSubcommandOptions if that option is allowed for the current
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* photo image subcommand. On return, the bit is set in the options
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* field of the SubcommandOptions structure if that option was specified.
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*
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* OPT_FORMAT: Set if -format option allowed/specified.
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* OPT_FROM: Set if -from option allowed/specified.
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* OPT_SHRINK: Set if -shrink option allowed/specified.
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* OPT_SUBSAMPLE: Set if -subsample option allowed/spec'd.
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* OPT_TO: Set if -to option allowed/specified.
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* OPT_ZOOM: Set if -zoom option allowed/specified.
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*/
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#define OPT_FORMAT 1
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#define OPT_FROM 2
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#define OPT_SHRINK 4
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#define OPT_SUBSAMPLE 8
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#define OPT_TO 0x10
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#define OPT_ZOOM 0x20
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/*
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* List of option names. The order here must match the order of
|
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* declarations of the OPT_* constants above.
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||
*/
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static char *optionNames[] = {
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"-format",
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"-from",
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"-shrink",
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"-subsample",
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"-to",
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"-zoom",
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(char *) NULL
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};
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/*
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* The type record for photo images:
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*/
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static int ImgPhotoCreate _ANSI_ARGS_((Tcl_Interp *interp,
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char *name, int argc, char **argv,
|
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Tk_ImageType *typePtr, Tk_ImageMaster master,
|
||
ClientData *clientDataPtr));
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static ClientData ImgPhotoGet _ANSI_ARGS_((Tk_Window tkwin,
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ClientData clientData));
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static void ImgPhotoDisplay _ANSI_ARGS_((ClientData clientData,
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Display *display, Drawable drawable,
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int imageX, int imageY, int width, int height,
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int drawableX, int drawableY));
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static void ImgPhotoFree _ANSI_ARGS_((ClientData clientData,
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Display *display));
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static void ImgPhotoDelete _ANSI_ARGS_((ClientData clientData));
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Tk_ImageType tkPhotoImageType = {
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"photo", /* name */
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ImgPhotoCreate, /* createProc */
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ImgPhotoGet, /* getProc */
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ImgPhotoDisplay, /* displayProc */
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ImgPhotoFree, /* freeProc */
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ImgPhotoDelete, /* deleteProc */
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(Tk_ImageType *) NULL /* nextPtr */
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};
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/*
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* Default configuration
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*/
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#define DEF_PHOTO_GAMMA "1"
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#define DEF_PHOTO_HEIGHT "0"
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#define DEF_PHOTO_PALETTE ""
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#define DEF_PHOTO_WIDTH "0"
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/*
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* Information used for parsing configuration specifications:
|
||
*/
|
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static Tk_ConfigSpec configSpecs[] = {
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{TK_CONFIG_STRING, "-data", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(PhotoMaster, dataString), TK_CONFIG_NULL_OK},
|
||
{TK_CONFIG_STRING, "-format", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(PhotoMaster, format), TK_CONFIG_NULL_OK},
|
||
{TK_CONFIG_STRING, "-file", (char *) NULL, (char *) NULL,
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(char *) NULL, Tk_Offset(PhotoMaster, fileString), TK_CONFIG_NULL_OK},
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{TK_CONFIG_DOUBLE, "-gamma", (char *) NULL, (char *) NULL,
|
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DEF_PHOTO_GAMMA, Tk_Offset(PhotoMaster, gamma), 0},
|
||
{TK_CONFIG_INT, "-height", (char *) NULL, (char *) NULL,
|
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DEF_PHOTO_HEIGHT, Tk_Offset(PhotoMaster, userHeight), 0},
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||
{TK_CONFIG_UID, "-palette", (char *) NULL, (char *) NULL,
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DEF_PHOTO_PALETTE, Tk_Offset(PhotoMaster, palette), 0},
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{TK_CONFIG_INT, "-width", (char *) NULL, (char *) NULL,
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DEF_PHOTO_WIDTH, Tk_Offset(PhotoMaster, userWidth), 0},
|
||
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
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||
(char *) NULL, 0, 0}
|
||
};
|
||
|
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/*
|
||
* Hash table used to hash from (display, colormap, palette, gamma)
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||
* to ColorTable address.
|
||
*/
|
||
|
||
static Tcl_HashTable imgPhotoColorHash;
|
||
static int imgPhotoColorHashInitialized;
|
||
#define N_COLOR_HASH (sizeof(ColorTableId) / sizeof(int))
|
||
|
||
/*
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||
* Pointer to the first in the list of known photo image formats.
|
||
*/
|
||
|
||
static Tk_PhotoImageFormat *formatList = NULL;
|
||
|
||
/*
|
||
* Forward declarations
|
||
*/
|
||
|
||
static int ImgPhotoCmd _ANSI_ARGS_((ClientData clientData,
|
||
Tcl_Interp *interp, int argc, char **argv));
|
||
static int ParseSubcommandOptions _ANSI_ARGS_((
|
||
struct SubcommandOptions *optPtr,
|
||
Tcl_Interp *interp, int allowedOptions,
|
||
int *indexPtr, int argc, char **argv));
|
||
static void ImgPhotoCmdDeletedProc _ANSI_ARGS_((
|
||
ClientData clientData));
|
||
static int ImgPhotoConfigureMaster _ANSI_ARGS_((
|
||
Tcl_Interp *interp, PhotoMaster *masterPtr,
|
||
int argc, char **argv, int flags));
|
||
static void ImgPhotoConfigureInstance _ANSI_ARGS_((
|
||
PhotoInstance *instancePtr));
|
||
static void ImgPhotoSetSize _ANSI_ARGS_((PhotoMaster *masterPtr,
|
||
int width, int height));
|
||
static void ImgPhotoInstanceSetSize _ANSI_ARGS_((
|
||
PhotoInstance *instancePtr));
|
||
static int IsValidPalette _ANSI_ARGS_((PhotoInstance *instancePtr,
|
||
char *palette));
|
||
static int CountBits _ANSI_ARGS_((pixel mask));
|
||
static void GetColorTable _ANSI_ARGS_((PhotoInstance *instancePtr));
|
||
static void FreeColorTable _ANSI_ARGS_((ColorTable *colorPtr));
|
||
static void AllocateColors _ANSI_ARGS_((ColorTable *colorPtr));
|
||
static void DisposeColorTable _ANSI_ARGS_((ClientData clientData));
|
||
static void DisposeInstance _ANSI_ARGS_((ClientData clientData));
|
||
static int ReclaimColors _ANSI_ARGS_((ColorTableId *id,
|
||
int numColors));
|
||
static int MatchFileFormat _ANSI_ARGS_((Tcl_Interp *interp,
|
||
Tcl_Channel chan, char *fileName,
|
||
char *formatString,
|
||
Tk_PhotoImageFormat **imageFormatPtr,
|
||
int *widthPtr, int *heightPtr));
|
||
static int MatchStringFormat _ANSI_ARGS_((Tcl_Interp *interp,
|
||
char *string, char *formatString,
|
||
Tk_PhotoImageFormat **imageFormatPtr,
|
||
int *widthPtr, int *heightPtr));
|
||
static void Dither _ANSI_ARGS_((PhotoMaster *masterPtr,
|
||
int x, int y, int width, int height));
|
||
static void DitherInstance _ANSI_ARGS_((PhotoInstance *instancePtr,
|
||
int x, int y, int width, int height));
|
||
|
||
#undef MIN
|
||
#define MIN(a, b) ((a) < (b)? (a): (b))
|
||
#undef MAX
|
||
#define MAX(a, b) ((a) > (b)? (a): (b))
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_CreatePhotoImageFormat --
|
||
*
|
||
* This procedure is invoked by an image file handler to register
|
||
* a new photo image format and the procedures that handle the
|
||
* new format. The procedure is typically invoked during
|
||
* Tcl_AppInit.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The new image file format is entered into a table used in the
|
||
* photo image "read" and "write" subcommands.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_CreatePhotoImageFormat(formatPtr)
|
||
Tk_PhotoImageFormat *formatPtr;
|
||
/* Structure describing the format. All of
|
||
* the fields except "nextPtr" must be filled
|
||
* in by caller. Must not have been passed
|
||
* to Tk_CreatePhotoImageFormat previously. */
|
||
{
|
||
Tk_PhotoImageFormat *copyPtr;
|
||
|
||
copyPtr = (Tk_PhotoImageFormat *) ckalloc(sizeof(Tk_PhotoImageFormat));
|
||
*copyPtr = *formatPtr;
|
||
copyPtr->name = (char *) ckalloc((unsigned) (strlen(formatPtr->name) + 1));
|
||
strcpy(copyPtr->name, formatPtr->name);
|
||
copyPtr->nextPtr = formatList;
|
||
formatList = copyPtr;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoCreate --
|
||
*
|
||
* This procedure is called by the Tk image code to create
|
||
* a new photo image.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* The data structure for a new photo image is allocated and
|
||
* initialized.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ImgPhotoCreate(interp, name, argc, argv, typePtr, master, clientDataPtr)
|
||
Tcl_Interp *interp; /* Interpreter for application containing
|
||
* image. */
|
||
char *name; /* Name to use for image. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings for options (doesn't
|
||
* include image name or type). */
|
||
Tk_ImageType *typePtr; /* Pointer to our type record (not used). */
|
||
Tk_ImageMaster master; /* Token for image, to be used by us in
|
||
* later callbacks. */
|
||
ClientData *clientDataPtr; /* Store manager's token for image here;
|
||
* it will be returned in later callbacks. */
|
||
{
|
||
PhotoMaster *masterPtr;
|
||
|
||
/*
|
||
* Allocate and initialize the photo image master record.
|
||
*/
|
||
|
||
masterPtr = (PhotoMaster *) ckalloc(sizeof(PhotoMaster));
|
||
memset((void *) masterPtr, 0, sizeof(PhotoMaster));
|
||
masterPtr->tkMaster = master;
|
||
masterPtr->interp = interp;
|
||
masterPtr->imageCmd = Tcl_CreateCommand(interp, name, ImgPhotoCmd,
|
||
(ClientData) masterPtr, ImgPhotoCmdDeletedProc);
|
||
masterPtr->palette = NULL;
|
||
masterPtr->pix24 = NULL;
|
||
masterPtr->instancePtr = NULL;
|
||
masterPtr->validRegion = TkCreateRegion();
|
||
|
||
/*
|
||
* Process configuration options given in the image create command.
|
||
*/
|
||
|
||
if (ImgPhotoConfigureMaster(interp, masterPtr, argc, argv, 0) != TCL_OK) {
|
||
ImgPhotoDelete((ClientData) masterPtr);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
*clientDataPtr = (ClientData) masterPtr;
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoCmd --
|
||
*
|
||
* This procedure is invoked to process the Tcl command that
|
||
* corresponds to a photo image. See the user documentation
|
||
* for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* See the user documentation.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ImgPhotoCmd(clientData, interp, argc, argv)
|
||
ClientData clientData; /* Information about photo master. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) clientData;
|
||
int c, result, index;
|
||
int x, y, width, height;
|
||
int dataWidth, dataHeight;
|
||
struct SubcommandOptions options;
|
||
int listArgc;
|
||
char **listArgv;
|
||
char **srcArgv;
|
||
unsigned char *pixelPtr;
|
||
Tk_PhotoImageBlock block;
|
||
Tk_Window tkwin;
|
||
char string[16];
|
||
XColor color;
|
||
Tk_PhotoImageFormat *imageFormat;
|
||
int imageWidth, imageHeight;
|
||
int matched;
|
||
Tcl_Channel chan;
|
||
Tk_PhotoHandle srcHandle;
|
||
size_t length;
|
||
|
||
if (argc < 2) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" option ?arg arg ...?\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
c = argv[1][0];
|
||
length = strlen(argv[1]);
|
||
|
||
if ((c == 'b') && (strncmp(argv[1], "blank", length) == 0)) {
|
||
/*
|
||
* photo blank command - just call Tk_PhotoBlank.
|
||
*/
|
||
|
||
if (argc == 2) {
|
||
Tk_PhotoBlank(masterPtr);
|
||
} else {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"",
|
||
argv[0], " blank\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
} else if ((c == 'c') && (length >= 2)
|
||
&& (strncmp(argv[1], "cget", length) == 0)) {
|
||
if (argc != 3) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"",
|
||
argv[0], " cget option\"",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
Tk_ConfigureValue(interp, Tk_MainWindow(interp), configSpecs,
|
||
(char *) masterPtr, argv[2], 0);
|
||
} else if ((c == 'c') && (length >= 3)
|
||
&& (strncmp(argv[1], "configure", length) == 0)) {
|
||
/*
|
||
* photo configure command - handle this in the standard way.
|
||
*/
|
||
|
||
if (argc == 2) {
|
||
return Tk_ConfigureInfo(interp, Tk_MainWindow(interp),
|
||
configSpecs, (char *) masterPtr, (char *) NULL, 0);
|
||
}
|
||
if (argc == 3) {
|
||
return Tk_ConfigureInfo(interp, Tk_MainWindow(interp),
|
||
configSpecs, (char *) masterPtr, argv[2], 0);
|
||
}
|
||
return ImgPhotoConfigureMaster(interp, masterPtr, argc-2, argv+2,
|
||
TK_CONFIG_ARGV_ONLY);
|
||
} else if ((c == 'c') && (length >= 3)
|
||
&& (strncmp(argv[1], "copy", length) == 0)) {
|
||
/*
|
||
* photo copy command - first parse options.
|
||
*/
|
||
|
||
index = 2;
|
||
memset((VOID *) &options, 0, sizeof(options));
|
||
options.zoomX = options.zoomY = 1;
|
||
options.subsampleX = options.subsampleY = 1;
|
||
options.name = NULL;
|
||
if (ParseSubcommandOptions(&options, interp,
|
||
OPT_FROM | OPT_TO | OPT_ZOOM | OPT_SUBSAMPLE | OPT_SHRINK,
|
||
&index, argc, argv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (options.name == NULL || index < argc) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" copy source-image ?-from x1 y1 x2 y2?",
|
||
" ?-to x1 y1 x2 y2? ?-zoom x y? ?-subsample x y?",
|
||
"\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Look for the source image and get a pointer to its image data.
|
||
* Check the values given for the -from option.
|
||
*/
|
||
|
||
if ((srcHandle = Tk_FindPhoto(interp, options.name)) == NULL) {
|
||
Tcl_AppendResult(interp, "image \"", argv[2], "\" doesn't",
|
||
" exist or is not a photo image", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
Tk_PhotoGetImage(srcHandle, &block);
|
||
if ((options.fromX2 > block.width) || (options.fromY2 > block.height)
|
||
|| (options.fromX2 > block.width)
|
||
|| (options.fromY2 > block.height)) {
|
||
Tcl_AppendResult(interp, "coordinates for -from option extend ",
|
||
"outside source image", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Fill in default values for unspecified parameters.
|
||
*/
|
||
|
||
if (((options.options & OPT_FROM) == 0) || (options.fromX2 < 0)) {
|
||
options.fromX2 = block.width;
|
||
options.fromY2 = block.height;
|
||
}
|
||
if (((options.options & OPT_TO) == 0) || (options.toX2 < 0)) {
|
||
width = options.fromX2 - options.fromX;
|
||
if (options.subsampleX > 0) {
|
||
width = (width + options.subsampleX - 1) / options.subsampleX;
|
||
} else if (options.subsampleX == 0) {
|
||
width = 0;
|
||
} else {
|
||
width = (width - options.subsampleX - 1) / -options.subsampleX;
|
||
}
|
||
options.toX2 = options.toX + width * options.zoomX;
|
||
|
||
height = options.fromY2 - options.fromY;
|
||
if (options.subsampleY > 0) {
|
||
height = (height + options.subsampleY - 1)
|
||
/ options.subsampleY;
|
||
} else if (options.subsampleY == 0) {
|
||
height = 0;
|
||
} else {
|
||
height = (height - options.subsampleY - 1)
|
||
/ -options.subsampleY;
|
||
}
|
||
options.toY2 = options.toY + height * options.zoomY;
|
||
}
|
||
|
||
/*
|
||
* Set the destination image size if the -shrink option was specified.
|
||
*/
|
||
|
||
if (options.options & OPT_SHRINK) {
|
||
ImgPhotoSetSize(masterPtr, options.toX2, options.toY2);
|
||
}
|
||
|
||
/*
|
||
* Copy the image data over using Tk_PhotoPutZoomedBlock.
|
||
*/
|
||
|
||
block.pixelPtr += options.fromX * block.pixelSize
|
||
+ options.fromY * block.pitch;
|
||
block.width = options.fromX2 - options.fromX;
|
||
block.height = options.fromY2 - options.fromY;
|
||
Tk_PhotoPutZoomedBlock((Tk_PhotoHandle) masterPtr, &block,
|
||
options.toX, options.toY, options.toX2 - options.toX,
|
||
options.toY2 - options.toY, options.zoomX, options.zoomY,
|
||
options.subsampleX, options.subsampleY);
|
||
|
||
} else if ((c == 'g') && (strncmp(argv[1], "get", length) == 0)) {
|
||
/*
|
||
* photo get command - first parse and check parameters.
|
||
*/
|
||
|
||
if (argc != 4) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" get x y\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
if ((Tcl_GetInt(interp, argv[2], &x) != TCL_OK)
|
||
|| (Tcl_GetInt(interp, argv[3], &y) != TCL_OK)) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((x < 0) || (x >= masterPtr->width)
|
||
|| (y < 0) || (y >= masterPtr->height)) {
|
||
Tcl_AppendResult(interp, argv[0], " get: ",
|
||
"coordinates out of range", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Extract the value of the desired pixel and format it as a string.
|
||
*/
|
||
|
||
pixelPtr = masterPtr->pix24 + (y * masterPtr->width + x) * 3;
|
||
sprintf(string, "%d %d %d", pixelPtr[0], pixelPtr[1],
|
||
pixelPtr[2]);
|
||
Tcl_AppendResult(interp, string, (char *) NULL);
|
||
} else if ((c == 'p') && (strncmp(argv[1], "put", length) == 0)) {
|
||
/*
|
||
* photo put command - first parse the options and colors specified.
|
||
*/
|
||
|
||
index = 2;
|
||
memset((VOID *) &options, 0, sizeof(options));
|
||
options.name = NULL;
|
||
if (ParseSubcommandOptions(&options, interp, OPT_TO,
|
||
&index, argc, argv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((options.name == NULL) || (index < argc)) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" put {{colors...}...} ?-to x1 y1 x2 y2?\"",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
if (Tcl_SplitList(interp, options.name, &dataHeight, &srcArgv)
|
||
!= TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
tkwin = Tk_MainWindow(interp);
|
||
block.pixelPtr = NULL;
|
||
dataWidth = 0;
|
||
pixelPtr = NULL;
|
||
for (y = 0; y < dataHeight; ++y) {
|
||
if (Tcl_SplitList(interp, srcArgv[y], &listArgc, &listArgv)
|
||
!= TCL_OK) {
|
||
break;
|
||
}
|
||
if (y == 0) {
|
||
dataWidth = listArgc;
|
||
pixelPtr = (unsigned char *) ckalloc((unsigned)
|
||
dataWidth * dataHeight * 3);
|
||
block.pixelPtr = pixelPtr;
|
||
} else {
|
||
if (listArgc != dataWidth) {
|
||
Tcl_AppendResult(interp, "all elements of color list must",
|
||
" have the same number of elements",
|
||
(char *) NULL);
|
||
ckfree((char *) listArgv);
|
||
break;
|
||
}
|
||
}
|
||
for (x = 0; x < dataWidth; ++x) {
|
||
if (!XParseColor(Tk_Display(tkwin), Tk_Colormap(tkwin),
|
||
listArgv[x], &color)) {
|
||
Tcl_AppendResult(interp, "can't parse color \"",
|
||
listArgv[x], "\"", (char *) NULL);
|
||
break;
|
||
}
|
||
*pixelPtr++ = color.red >> 8;
|
||
*pixelPtr++ = color.green >> 8;
|
||
*pixelPtr++ = color.blue >> 8;
|
||
}
|
||
ckfree((char *) listArgv);
|
||
if (x < dataWidth)
|
||
break;
|
||
}
|
||
ckfree((char *) srcArgv);
|
||
if (y < dataHeight || dataHeight == 0 || dataWidth == 0) {
|
||
if (block.pixelPtr != NULL) {
|
||
ckfree((char *) block.pixelPtr);
|
||
}
|
||
if (y < dataHeight) {
|
||
return TCL_ERROR;
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
* Fill in default values for the -to option, then
|
||
* copy the block in using Tk_PhotoPutBlock.
|
||
*/
|
||
|
||
if (((options.options & OPT_TO) == 0) || (options.toX2 < 0)) {
|
||
options.toX2 = options.toX + dataWidth;
|
||
options.toY2 = options.toY + dataHeight;
|
||
}
|
||
block.width = dataWidth;
|
||
block.height = dataHeight;
|
||
block.pitch = dataWidth * 3;
|
||
block.pixelSize = 3;
|
||
block.offset[0] = 0;
|
||
block.offset[1] = 1;
|
||
block.offset[2] = 2;
|
||
Tk_PhotoPutBlock((ClientData)masterPtr, &block,
|
||
options.toX, options.toY, options.toX2 - options.toX,
|
||
options.toY2 - options.toY);
|
||
ckfree((char *) block.pixelPtr);
|
||
} else if ((c == 'r') && (length >= 3)
|
||
&& (strncmp(argv[1], "read", length) == 0)) {
|
||
/*
|
||
* photo read command - first parse the options specified.
|
||
*/
|
||
|
||
index = 2;
|
||
memset((VOID *) &options, 0, sizeof(options));
|
||
options.name = NULL;
|
||
options.format = NULL;
|
||
if (ParseSubcommandOptions(&options, interp,
|
||
OPT_FORMAT | OPT_FROM | OPT_TO | OPT_SHRINK,
|
||
&index, argc, argv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((options.name == NULL) || (index < argc)) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" read fileName ?-format format-name?",
|
||
" ?-from x1 y1 x2 y2? ?-to x y? ?-shrink?\"",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Prevent file system access in safe interpreters.
|
||
*/
|
||
|
||
if (Tcl_IsSafe(interp)) {
|
||
Tcl_AppendResult(interp, "can't get image from a file in a",
|
||
" safe interpreter", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Open the image file and look for a handler for it.
|
||
*/
|
||
|
||
chan = Tcl_OpenFileChannel(interp, options.name, "r", 0);
|
||
if (chan == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (Tcl_SetChannelOption(interp, chan, "-translation", "binary")
|
||
!= TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (MatchFileFormat(interp, chan, options.name, options.format,
|
||
&imageFormat, &imageWidth, &imageHeight) != TCL_OK) {
|
||
Tcl_Close(NULL, chan);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Check the values given for the -from option.
|
||
*/
|
||
|
||
if ((options.fromX > imageWidth) || (options.fromY > imageHeight)
|
||
|| (options.fromX2 > imageWidth)
|
||
|| (options.fromY2 > imageHeight)) {
|
||
Tcl_AppendResult(interp, "coordinates for -from option extend ",
|
||
"outside source image", (char *) NULL);
|
||
Tcl_Close(NULL, chan);
|
||
return TCL_ERROR;
|
||
}
|
||
if (((options.options & OPT_FROM) == 0) || (options.fromX2 < 0)) {
|
||
width = imageWidth - options.fromX;
|
||
height = imageHeight - options.fromY;
|
||
} else {
|
||
width = options.fromX2 - options.fromX;
|
||
height = options.fromY2 - options.fromY;
|
||
}
|
||
|
||
/*
|
||
* If the -shrink option was specified, set the size of the image.
|
||
*/
|
||
|
||
if (options.options & OPT_SHRINK) {
|
||
ImgPhotoSetSize(masterPtr, options.toX + width,
|
||
options.toY + height);
|
||
}
|
||
|
||
/*
|
||
* Call the handler's file read procedure to read the data
|
||
* into the image.
|
||
*/
|
||
|
||
result = (*imageFormat->fileReadProc)(interp, chan, options.name,
|
||
options.format, (Tk_PhotoHandle) masterPtr, options.toX,
|
||
options.toY, width, height, options.fromX, options.fromY);
|
||
if (chan != NULL) {
|
||
Tcl_Close(NULL, chan);
|
||
}
|
||
return result;
|
||
} else if ((c == 'r') && (length >= 3)
|
||
&& (strncmp(argv[1], "redither", length) == 0)) {
|
||
|
||
if (argc == 2) {
|
||
/*
|
||
* Call Dither if any part of the image is not correctly
|
||
* dithered at present.
|
||
*/
|
||
|
||
x = masterPtr->ditherX;
|
||
y = masterPtr->ditherY;
|
||
if (masterPtr->ditherX != 0) {
|
||
Dither(masterPtr, x, y, masterPtr->width - x, 1);
|
||
}
|
||
if (masterPtr->ditherY < masterPtr->height) {
|
||
x = 0;
|
||
Dither(masterPtr, 0, masterPtr->ditherY, masterPtr->width,
|
||
masterPtr->height - masterPtr->ditherY);
|
||
}
|
||
|
||
if (y < masterPtr->height) {
|
||
/*
|
||
* Tell the core image code that part of the image has changed.
|
||
*/
|
||
|
||
Tk_ImageChanged(masterPtr->tkMaster, x, y,
|
||
(masterPtr->width - x), (masterPtr->height - y),
|
||
masterPtr->width, masterPtr->height);
|
||
}
|
||
|
||
} else {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" redither\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
} else if ((c == 'w') && (strncmp(argv[1], "write", length) == 0)) {
|
||
|
||
/*
|
||
* Prevent file system access in safe interpreters.
|
||
*/
|
||
|
||
if (Tcl_IsSafe(interp)) {
|
||
Tcl_AppendResult(interp, "can't write image to a file in a",
|
||
" safe interpreter", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* photo write command - first parse and check any options given.
|
||
*/
|
||
|
||
index = 2;
|
||
memset((VOID *) &options, 0, sizeof(options));
|
||
options.name = NULL;
|
||
options.format = NULL;
|
||
if (ParseSubcommandOptions(&options, interp, OPT_FORMAT | OPT_FROM,
|
||
&index, argc, argv) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((options.name == NULL) || (index < argc)) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
|
||
" write fileName ?-format format-name?",
|
||
"?-from x1 y1 x2 y2?\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
if ((options.fromX > masterPtr->width)
|
||
|| (options.fromY > masterPtr->height)
|
||
|| (options.fromX2 > masterPtr->width)
|
||
|| (options.fromY2 > masterPtr->height)) {
|
||
Tcl_AppendResult(interp, "coordinates for -from option extend ",
|
||
"outside image", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Fill in default values for unspecified parameters.
|
||
*/
|
||
|
||
if (((options.options & OPT_FROM) == 0) || (options.fromX2 < 0)) {
|
||
options.fromX2 = masterPtr->width;
|
||
options.fromY2 = masterPtr->height;
|
||
}
|
||
|
||
/*
|
||
* Search for an appropriate image file format handler,
|
||
* and give an error if none is found.
|
||
*/
|
||
|
||
matched = 0;
|
||
for (imageFormat = formatList; imageFormat != NULL;
|
||
imageFormat = imageFormat->nextPtr) {
|
||
if ((options.format == NULL)
|
||
|| (strncasecmp(options.format, imageFormat->name,
|
||
strlen(imageFormat->name)) == 0)) {
|
||
matched = 1;
|
||
if (imageFormat->fileWriteProc != NULL) {
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
if (imageFormat == NULL) {
|
||
if (options.format == NULL) {
|
||
Tcl_AppendResult(interp, "no available image file format ",
|
||
"has file writing capability", (char *) NULL);
|
||
} else if (!matched) {
|
||
Tcl_AppendResult(interp, "image file format \"",
|
||
options.format, "\" is unknown", (char *) NULL);
|
||
} else {
|
||
Tcl_AppendResult(interp, "image file format \"",
|
||
options.format, "\" has no file writing capability",
|
||
(char *) NULL);
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Call the handler's file write procedure to write out
|
||
* the image.
|
||
*/
|
||
|
||
Tk_PhotoGetImage((Tk_PhotoHandle) masterPtr, &block);
|
||
block.pixelPtr += options.fromY * block.pitch + options.fromX * 3;
|
||
block.width = options.fromX2 - options.fromX;
|
||
block.height = options.fromY2 - options.fromY;
|
||
return (*imageFormat->fileWriteProc)(interp, options.name,
|
||
options.format, &block);
|
||
} else {
|
||
Tcl_AppendResult(interp, "bad option \"", argv[1],
|
||
"\": must be blank, cget, configure, copy, get, put,",
|
||
" read, redither, or write", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ParseSubcommandOptions --
|
||
*
|
||
* This procedure is invoked to process one of the options
|
||
* which may be specified for the photo image subcommands,
|
||
* namely, -from, -to, -zoom, -subsample, -format, and -shrink.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Fields in *optPtr get filled in.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ParseSubcommandOptions(optPtr, interp, allowedOptions, optIndexPtr, argc, argv)
|
||
struct SubcommandOptions *optPtr;
|
||
/* Information about the options specified
|
||
* and the values given is returned here. */
|
||
Tcl_Interp *interp; /* Interpreter to use for reporting errors. */
|
||
int allowedOptions; /* Indicates which options are valid for
|
||
* the current command. */
|
||
int *optIndexPtr; /* Points to a variable containing the
|
||
* current index in argv; this variable is
|
||
* updated by this procedure. */
|
||
int argc; /* Number of arguments in argv[]. */
|
||
char **argv; /* Arguments to be parsed. */
|
||
{
|
||
int index, c, bit, currentBit;
|
||
size_t length;
|
||
char *option, **listPtr;
|
||
int values[4];
|
||
int numValues, maxValues, argIndex;
|
||
|
||
for (index = *optIndexPtr; index < argc; *optIndexPtr = ++index) {
|
||
/*
|
||
* We can have one value specified without an option;
|
||
* it goes into optPtr->name.
|
||
*/
|
||
|
||
option = argv[index];
|
||
if (option[0] != '-') {
|
||
if (optPtr->name == NULL) {
|
||
optPtr->name = option;
|
||
continue;
|
||
}
|
||
break;
|
||
}
|
||
|
||
/*
|
||
* Work out which option this is.
|
||
*/
|
||
|
||
length = strlen(option);
|
||
c = option[0];
|
||
bit = 0;
|
||
currentBit = 1;
|
||
for (listPtr = optionNames; *listPtr != NULL; ++listPtr) {
|
||
if ((c == *listPtr[0])
|
||
&& (strncmp(option, *listPtr, length) == 0)) {
|
||
if (bit != 0) {
|
||
bit = 0; /* An ambiguous option. */
|
||
break;
|
||
}
|
||
bit = currentBit;
|
||
}
|
||
currentBit <<= 1;
|
||
}
|
||
|
||
/*
|
||
* If this option is not recognized and allowed, put
|
||
* an error message in the interpreter and return.
|
||
*/
|
||
|
||
if ((allowedOptions & bit) == 0) {
|
||
Tcl_AppendResult(interp, "unrecognized option \"", argv[index],
|
||
"\": must be ", (char *)NULL);
|
||
bit = 1;
|
||
for (listPtr = optionNames; *listPtr != NULL; ++listPtr) {
|
||
if ((allowedOptions & bit) != 0) {
|
||
if ((allowedOptions & (bit - 1)) != 0) {
|
||
Tcl_AppendResult(interp, ", ", (char *) NULL);
|
||
if ((allowedOptions & ~((bit << 1) - 1)) == 0) {
|
||
Tcl_AppendResult(interp, "or ", (char *) NULL);
|
||
}
|
||
}
|
||
Tcl_AppendResult(interp, *listPtr, (char *) NULL);
|
||
}
|
||
bit <<= 1;
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* For the -from, -to, -zoom and -subsample options,
|
||
* parse the values given. Report an error if too few
|
||
* or too many values are given.
|
||
*/
|
||
|
||
if ((bit != OPT_SHRINK) && (bit != OPT_FORMAT)) {
|
||
maxValues = ((bit == OPT_FROM) || (bit == OPT_TO))? 4: 2;
|
||
argIndex = index + 1;
|
||
for (numValues = 0; numValues < maxValues; ++numValues) {
|
||
if ((argIndex < argc) && (isdigit(UCHAR(argv[argIndex][0]))
|
||
|| ((argv[argIndex][0] == '-')
|
||
&& (isdigit(UCHAR(argv[argIndex][1])))))) {
|
||
if (Tcl_GetInt(interp, argv[argIndex], &values[numValues])
|
||
!= TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
} else {
|
||
break;
|
||
}
|
||
++argIndex;
|
||
}
|
||
|
||
if (numValues == 0) {
|
||
Tcl_AppendResult(interp, "the \"", argv[index], "\" option ",
|
||
"requires one ", maxValues == 2? "or two": "to four",
|
||
" integer values", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
*optIndexPtr = (index += numValues);
|
||
|
||
/*
|
||
* Y values default to the corresponding X value if not specified.
|
||
*/
|
||
|
||
if (numValues == 1) {
|
||
values[1] = values[0];
|
||
}
|
||
if (numValues == 3) {
|
||
values[3] = values[2];
|
||
}
|
||
|
||
/*
|
||
* Check the values given and put them in the appropriate
|
||
* field of the SubcommandOptions structure.
|
||
*/
|
||
|
||
switch (bit) {
|
||
case OPT_FROM:
|
||
if ((values[0] < 0) || (values[1] < 0) || ((numValues > 2)
|
||
&& ((values[2] < 0) || (values[3] < 0)))) {
|
||
Tcl_AppendResult(interp, "value(s) for the -from",
|
||
" option must be non-negative", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
if (numValues <= 2) {
|
||
optPtr->fromX = values[0];
|
||
optPtr->fromY = values[1];
|
||
optPtr->fromX2 = -1;
|
||
optPtr->fromY2 = -1;
|
||
} else {
|
||
optPtr->fromX = MIN(values[0], values[2]);
|
||
optPtr->fromY = MIN(values[1], values[3]);
|
||
optPtr->fromX2 = MAX(values[0], values[2]);
|
||
optPtr->fromY2 = MAX(values[1], values[3]);
|
||
}
|
||
break;
|
||
case OPT_SUBSAMPLE:
|
||
optPtr->subsampleX = values[0];
|
||
optPtr->subsampleY = values[1];
|
||
break;
|
||
case OPT_TO:
|
||
if ((values[0] < 0) || (values[1] < 0) || ((numValues > 2)
|
||
&& ((values[2] < 0) || (values[3] < 0)))) {
|
||
Tcl_AppendResult(interp, "value(s) for the -to",
|
||
" option must be non-negative", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
if (numValues <= 2) {
|
||
optPtr->toX = values[0];
|
||
optPtr->toY = values[1];
|
||
optPtr->toX2 = -1;
|
||
optPtr->toY2 = -1;
|
||
} else {
|
||
optPtr->toX = MIN(values[0], values[2]);
|
||
optPtr->toY = MIN(values[1], values[3]);
|
||
optPtr->toX2 = MAX(values[0], values[2]);
|
||
optPtr->toY2 = MAX(values[1], values[3]);
|
||
}
|
||
break;
|
||
case OPT_ZOOM:
|
||
if ((values[0] <= 0) || (values[1] <= 0)) {
|
||
Tcl_AppendResult(interp, "value(s) for the -zoom",
|
||
" option must be positive", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
optPtr->zoomX = values[0];
|
||
optPtr->zoomY = values[1];
|
||
break;
|
||
}
|
||
} else if (bit == OPT_FORMAT) {
|
||
/*
|
||
* The -format option takes a single string value.
|
||
*/
|
||
|
||
if (index + 1 < argc) {
|
||
*optIndexPtr = ++index;
|
||
optPtr->format = argv[index];
|
||
} else {
|
||
Tcl_AppendResult(interp, "the \"-format\" option ",
|
||
"requires a value", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Remember that we saw this option.
|
||
*/
|
||
|
||
optPtr->options |= bit;
|
||
}
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoConfigureMaster --
|
||
*
|
||
* This procedure is called when a photo image is created or
|
||
* reconfigured. It processes configuration options and resets
|
||
* any instances of the image.
|
||
*
|
||
* Results:
|
||
* A standard Tcl return value. If TCL_ERROR is returned then
|
||
* an error message is left in masterPtr->interp->result.
|
||
*
|
||
* Side effects:
|
||
* Existing instances of the image will be redisplayed to match
|
||
* the new configuration options.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ImgPhotoConfigureMaster(interp, masterPtr, argc, argv, flags)
|
||
Tcl_Interp *interp; /* Interpreter to use for reporting errors. */
|
||
PhotoMaster *masterPtr; /* Pointer to data structure describing
|
||
* overall photo image to (re)configure. */
|
||
int argc; /* Number of entries in argv. */
|
||
char **argv; /* Pairs of configuration options for image. */
|
||
int flags; /* Flags to pass to Tk_ConfigureWidget,
|
||
* such as TK_CONFIG_ARGV_ONLY. */
|
||
{
|
||
PhotoInstance *instancePtr;
|
||
char *oldFileString, *oldDataString, *oldPaletteString;
|
||
double oldGamma;
|
||
int result;
|
||
Tcl_Channel chan;
|
||
Tk_PhotoImageFormat *imageFormat;
|
||
int imageWidth, imageHeight;
|
||
|
||
/*
|
||
* Save the current values for fileString and dataString, so we
|
||
* can tell if the user specifies them anew.
|
||
*/
|
||
|
||
oldFileString = masterPtr->fileString;
|
||
oldDataString = (oldFileString == NULL)? masterPtr->dataString: NULL;
|
||
oldPaletteString = masterPtr->palette;
|
||
oldGamma = masterPtr->gamma;
|
||
|
||
/*
|
||
* Process the configuration options specified.
|
||
*/
|
||
|
||
if (Tk_ConfigureWidget(interp, Tk_MainWindow(interp), configSpecs,
|
||
argc, argv, (char *) masterPtr, flags) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Regard the empty string for -file, -data or -format as the null
|
||
* value.
|
||
*/
|
||
|
||
if ((masterPtr->fileString != NULL) && (masterPtr->fileString[0] == 0)) {
|
||
ckfree(masterPtr->fileString);
|
||
masterPtr->fileString = NULL;
|
||
}
|
||
if ((masterPtr->dataString != NULL) && (masterPtr->dataString[0] == 0)) {
|
||
ckfree(masterPtr->dataString);
|
||
masterPtr->dataString = NULL;
|
||
}
|
||
if ((masterPtr->format != NULL) && (masterPtr->format[0] == 0)) {
|
||
ckfree(masterPtr->format);
|
||
masterPtr->format = NULL;
|
||
}
|
||
|
||
/*
|
||
* Set the image to the user-requested size, if any,
|
||
* and make sure storage is correctly allocated for this image.
|
||
*/
|
||
|
||
ImgPhotoSetSize(masterPtr, masterPtr->width, masterPtr->height);
|
||
|
||
/*
|
||
* Read in the image from the file or string if the user has
|
||
* specified the -file or -data option.
|
||
*/
|
||
|
||
if ((masterPtr->fileString != NULL)
|
||
&& (masterPtr->fileString != oldFileString)) {
|
||
|
||
/*
|
||
* Prevent file system access in a safe interpreter.
|
||
*/
|
||
|
||
if (Tcl_IsSafe(interp)) {
|
||
Tcl_AppendResult(interp, "can't get image from a file in a",
|
||
" safe interpreter", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
#if defined(STk_CODE) && defined(WIN32)
|
||
chan = Tcl_OpenFileChannel(interp, masterPtr->fileString, "rb", 0);
|
||
#else
|
||
chan = Tcl_OpenFileChannel(interp, masterPtr->fileString, "r", 0);
|
||
#endif
|
||
if (chan == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
#ifndef STk_CODE
|
||
if (Tcl_SetChannelOption(interp, chan, "-translation", "binary")
|
||
!= TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
#endif
|
||
if (MatchFileFormat(interp, chan, masterPtr->fileString,
|
||
masterPtr->format, &imageFormat, &imageWidth,
|
||
&imageHeight) != TCL_OK) {
|
||
Tcl_Close(NULL, chan);
|
||
return TCL_ERROR;
|
||
}
|
||
ImgPhotoSetSize(masterPtr, imageWidth, imageHeight);
|
||
result = (*imageFormat->fileReadProc)(interp, chan,
|
||
masterPtr->fileString, masterPtr->format,
|
||
(Tk_PhotoHandle) masterPtr, 0, 0,
|
||
imageWidth, imageHeight, 0, 0);
|
||
Tcl_Close(NULL, chan);
|
||
if (result != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
masterPtr->flags |= IMAGE_CHANGED;
|
||
}
|
||
|
||
if ((masterPtr->fileString == NULL) && (masterPtr->dataString != NULL)
|
||
&& (masterPtr->dataString != oldDataString)) {
|
||
|
||
if (MatchStringFormat(interp, masterPtr->dataString,
|
||
masterPtr->format, &imageFormat, &imageWidth,
|
||
&imageHeight) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
ImgPhotoSetSize(masterPtr, imageWidth, imageHeight);
|
||
if ((*imageFormat->stringReadProc)(interp, masterPtr->dataString,
|
||
masterPtr->format, (Tk_PhotoHandle) masterPtr,
|
||
0, 0, imageWidth, imageHeight, 0, 0) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
masterPtr->flags |= IMAGE_CHANGED;
|
||
}
|
||
|
||
/*
|
||
* Enforce a reasonable value for gamma.
|
||
*/
|
||
|
||
if (masterPtr->gamma <= 0) {
|
||
masterPtr->gamma = 1.0;
|
||
}
|
||
|
||
if ((masterPtr->gamma != oldGamma)
|
||
|| (masterPtr->palette != oldPaletteString)) {
|
||
masterPtr->flags |= IMAGE_CHANGED;
|
||
}
|
||
|
||
/*
|
||
* Cycle through all of the instances of this image, regenerating
|
||
* the information for each instance. Then force the image to be
|
||
* redisplayed everywhere that it is used.
|
||
*/
|
||
|
||
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
||
instancePtr = instancePtr->nextPtr) {
|
||
ImgPhotoConfigureInstance(instancePtr);
|
||
}
|
||
|
||
/*
|
||
* Inform the generic image code that the image
|
||
* has (potentially) changed.
|
||
*/
|
||
|
||
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, masterPtr->width,
|
||
masterPtr->height, masterPtr->width, masterPtr->height);
|
||
masterPtr->flags &= ~IMAGE_CHANGED;
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoConfigureInstance --
|
||
*
|
||
* This procedure is called to create displaying information for
|
||
* a photo image instance based on the configuration information
|
||
* in the master. It is invoked both when new instances are
|
||
* created and when the master is reconfigured.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Generates errors via Tcl_BackgroundError if there are problems
|
||
* in setting up the instance.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ImgPhotoConfigureInstance(instancePtr)
|
||
PhotoInstance *instancePtr; /* Instance to reconfigure. */
|
||
{
|
||
PhotoMaster *masterPtr = instancePtr->masterPtr;
|
||
XImage *imagePtr;
|
||
int bitsPerPixel;
|
||
ColorTable *colorTablePtr;
|
||
XRectangle validBox;
|
||
|
||
/*
|
||
* If the -palette configuration option has been set for the master,
|
||
* use the value specified for our palette, but only if it is
|
||
* a valid palette for our windows. Use the gamma value specified
|
||
* the master.
|
||
*/
|
||
|
||
if ((masterPtr->palette && masterPtr->palette[0])
|
||
&& IsValidPalette(instancePtr, masterPtr->palette)) {
|
||
instancePtr->palette = masterPtr->palette;
|
||
} else {
|
||
instancePtr->palette = instancePtr->defaultPalette;
|
||
}
|
||
instancePtr->gamma = masterPtr->gamma;
|
||
|
||
/*
|
||
* If we don't currently have a color table, or if the one we
|
||
* have no longer applies (e.g. because our palette or gamma
|
||
* has changed), get a new one.
|
||
*/
|
||
|
||
colorTablePtr = instancePtr->colorTablePtr;
|
||
if ((colorTablePtr == NULL)
|
||
|| (instancePtr->colormap != colorTablePtr->id.colormap)
|
||
|| (instancePtr->palette != colorTablePtr->id.palette)
|
||
|| (instancePtr->gamma != colorTablePtr->id.gamma)) {
|
||
/*
|
||
* Free up our old color table, and get a new one.
|
||
*/
|
||
|
||
if (colorTablePtr != NULL) {
|
||
colorTablePtr->liveRefCount -= 1;
|
||
FreeColorTable(colorTablePtr);
|
||
}
|
||
GetColorTable(instancePtr);
|
||
|
||
/*
|
||
* Create a new XImage structure for sending data to
|
||
* the X server, if necessary.
|
||
*/
|
||
|
||
if (instancePtr->colorTablePtr->flags & BLACK_AND_WHITE) {
|
||
bitsPerPixel = 1;
|
||
} else {
|
||
bitsPerPixel = instancePtr->visualInfo.depth;
|
||
}
|
||
|
||
if ((instancePtr->imagePtr == NULL)
|
||
|| (instancePtr->imagePtr->bits_per_pixel != bitsPerPixel)) {
|
||
if (instancePtr->imagePtr != NULL) {
|
||
XFree((char *) instancePtr->imagePtr);
|
||
}
|
||
imagePtr = XCreateImage(instancePtr->display,
|
||
instancePtr->visualInfo.visual, (unsigned) bitsPerPixel,
|
||
(bitsPerPixel > 1? ZPixmap: XYBitmap), 0, (char *) NULL,
|
||
1, 1, 32, 0);
|
||
instancePtr->imagePtr = imagePtr;
|
||
|
||
/*
|
||
* Determine the endianness of this machine.
|
||
* We create images using the local host's endianness, rather
|
||
* than the endianness of the server; otherwise we would have
|
||
* to byte-swap any 16 or 32 bit values that we store in the
|
||
* image in those situations where the server's endianness
|
||
* is different from ours.
|
||
*/
|
||
|
||
if (imagePtr != NULL) {
|
||
union {
|
||
int i;
|
||
char c[sizeof(int)];
|
||
} kludge;
|
||
|
||
imagePtr->bitmap_unit = sizeof(pixel) * NBBY;
|
||
kludge.i = 0;
|
||
kludge.c[0] = 1;
|
||
imagePtr->byte_order = (kludge.i == 1) ? LSBFirst : MSBFirst;
|
||
_XInitImageFuncPtrs(imagePtr);
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* If the user has specified a width and/or height for the master
|
||
* which is different from our current width/height, set the size
|
||
* to the values specified by the user. If we have no pixmap, we
|
||
* do this also, since it has the side effect of allocating a
|
||
* pixmap for us.
|
||
*/
|
||
|
||
if ((instancePtr->pixels == None) || (instancePtr->error == NULL)
|
||
|| (instancePtr->width != masterPtr->width)
|
||
|| (instancePtr->height != masterPtr->height)) {
|
||
ImgPhotoInstanceSetSize(instancePtr);
|
||
}
|
||
|
||
/*
|
||
* Redither this instance if necessary.
|
||
*/
|
||
|
||
if ((masterPtr->flags & IMAGE_CHANGED)
|
||
|| (instancePtr->colorTablePtr != colorTablePtr)) {
|
||
TkClipBox(masterPtr->validRegion, &validBox);
|
||
if ((validBox.width > 0) && (validBox.height > 0)) {
|
||
DitherInstance(instancePtr, validBox.x, validBox.y,
|
||
validBox.width, validBox.height);
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoGet --
|
||
*
|
||
* This procedure is called for each use of a photo image in a
|
||
* widget.
|
||
*
|
||
* Results:
|
||
* The return value is a token for the instance, which is passed
|
||
* back to us in calls to ImgPhotoDisplay and ImgPhotoFree.
|
||
*
|
||
* Side effects:
|
||
* A data structure is set up for the instance (or, an existing
|
||
* instance is re-used for the new one).
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static ClientData
|
||
ImgPhotoGet(tkwin, masterData)
|
||
Tk_Window tkwin; /* Window in which the instance will be
|
||
* used. */
|
||
ClientData masterData; /* Pointer to our master structure for the
|
||
* image. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) masterData;
|
||
PhotoInstance *instancePtr;
|
||
Colormap colormap;
|
||
int mono, nRed, nGreen, nBlue;
|
||
XVisualInfo visualInfo, *visInfoPtr;
|
||
XRectangle validBox;
|
||
char buf[16];
|
||
int numVisuals;
|
||
XColor *white, *black;
|
||
XGCValues gcValues;
|
||
|
||
/*
|
||
* Table of "best" choices for palette for PseudoColor displays
|
||
* with between 3 and 15 bits/pixel.
|
||
*/
|
||
|
||
static int paletteChoice[13][3] = {
|
||
/* #red, #green, #blue */
|
||
{2, 2, 2, /* 3 bits, 8 colors */},
|
||
{2, 3, 2, /* 4 bits, 12 colors */},
|
||
{3, 4, 2, /* 5 bits, 24 colors */},
|
||
{4, 5, 3, /* 6 bits, 60 colors */},
|
||
{5, 6, 4, /* 7 bits, 120 colors */},
|
||
{7, 7, 4, /* 8 bits, 198 colors */},
|
||
{8, 10, 6, /* 9 bits, 480 colors */},
|
||
{10, 12, 8, /* 10 bits, 960 colors */},
|
||
{14, 15, 9, /* 11 bits, 1890 colors */},
|
||
{16, 20, 12, /* 12 bits, 3840 colors */},
|
||
{20, 24, 16, /* 13 bits, 7680 colors */},
|
||
{26, 30, 20, /* 14 bits, 15600 colors */},
|
||
{32, 32, 30, /* 15 bits, 30720 colors */}
|
||
};
|
||
|
||
/*
|
||
* See if there is already an instance for windows using
|
||
* the same colormap. If so then just re-use it.
|
||
*/
|
||
|
||
colormap = Tk_Colormap(tkwin);
|
||
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
||
instancePtr = instancePtr->nextPtr) {
|
||
if ((colormap == instancePtr->colormap)
|
||
&& (Tk_Display(tkwin) == instancePtr->display)) {
|
||
|
||
/*
|
||
* Re-use this instance.
|
||
*/
|
||
|
||
if (instancePtr->refCount == 0) {
|
||
/*
|
||
* We are resurrecting this instance.
|
||
*/
|
||
|
||
Tcl_CancelIdleCall(DisposeInstance, (ClientData) instancePtr);
|
||
if (instancePtr->colorTablePtr != NULL) {
|
||
FreeColorTable(instancePtr->colorTablePtr);
|
||
}
|
||
GetColorTable(instancePtr);
|
||
}
|
||
instancePtr->refCount++;
|
||
return (ClientData) instancePtr;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* The image isn't already in use in a window with the same colormap.
|
||
* Make a new instance of the image.
|
||
*/
|
||
|
||
instancePtr = (PhotoInstance *) ckalloc(sizeof(PhotoInstance));
|
||
instancePtr->masterPtr = masterPtr;
|
||
instancePtr->display = Tk_Display(tkwin);
|
||
instancePtr->colormap = Tk_Colormap(tkwin);
|
||
Tk_PreserveColormap(instancePtr->display, instancePtr->colormap);
|
||
instancePtr->refCount = 1;
|
||
instancePtr->colorTablePtr = NULL;
|
||
instancePtr->pixels = None;
|
||
instancePtr->error = NULL;
|
||
instancePtr->width = 0;
|
||
instancePtr->height = 0;
|
||
instancePtr->imagePtr = 0;
|
||
instancePtr->nextPtr = masterPtr->instancePtr;
|
||
masterPtr->instancePtr = instancePtr;
|
||
|
||
/*
|
||
* Obtain information about the visual and decide on the
|
||
* default palette.
|
||
*/
|
||
|
||
visualInfo.screen = Tk_ScreenNumber(tkwin);
|
||
visualInfo.visualid = XVisualIDFromVisual(Tk_Visual(tkwin));
|
||
visInfoPtr = XGetVisualInfo(Tk_Display(tkwin),
|
||
VisualScreenMask | VisualIDMask, &visualInfo, &numVisuals);
|
||
nRed = 2;
|
||
nGreen = nBlue = 0;
|
||
mono = 1;
|
||
if (visInfoPtr != NULL) {
|
||
instancePtr->visualInfo = *visInfoPtr;
|
||
switch (visInfoPtr->class) {
|
||
case DirectColor:
|
||
case TrueColor:
|
||
nRed = 1 << CountBits(visInfoPtr->red_mask);
|
||
nGreen = 1 << CountBits(visInfoPtr->green_mask);
|
||
nBlue = 1 << CountBits(visInfoPtr->blue_mask);
|
||
mono = 0;
|
||
break;
|
||
case PseudoColor:
|
||
case StaticColor:
|
||
if (visInfoPtr->depth > 15) {
|
||
nRed = 32;
|
||
nGreen = 32;
|
||
nBlue = 32;
|
||
mono = 0;
|
||
} else if (visInfoPtr->depth >= 3) {
|
||
int *ip = paletteChoice[visInfoPtr->depth - 3];
|
||
|
||
nRed = ip[0];
|
||
nGreen = ip[1];
|
||
nBlue = ip[2];
|
||
mono = 0;
|
||
}
|
||
break;
|
||
case GrayScale:
|
||
case StaticGray:
|
||
nRed = 1 << visInfoPtr->depth;
|
||
break;
|
||
}
|
||
XFree((char *) visInfoPtr);
|
||
|
||
} else {
|
||
panic("ImgPhotoGet couldn't find visual for window");
|
||
}
|
||
|
||
sprintf(buf, ((mono) ? "%d": "%d/%d/%d"), nRed, nGreen, nBlue);
|
||
instancePtr->defaultPalette = Tk_GetUid(buf);
|
||
|
||
/*
|
||
* Make a GC with background = black and foreground = white.
|
||
*/
|
||
|
||
white = Tk_GetColor(masterPtr->interp, tkwin, "white");
|
||
black = Tk_GetColor(masterPtr->interp, tkwin, "black");
|
||
gcValues.foreground = (white != NULL)? white->pixel:
|
||
WhitePixelOfScreen(Tk_Screen(tkwin));
|
||
gcValues.background = (black != NULL)? black->pixel:
|
||
BlackPixelOfScreen(Tk_Screen(tkwin));
|
||
gcValues.graphics_exposures = False;
|
||
instancePtr->gc = Tk_GetGC(tkwin,
|
||
GCForeground|GCBackground|GCGraphicsExposures, &gcValues);
|
||
|
||
/*
|
||
* Set configuration options and finish the initialization of the instance.
|
||
*/
|
||
|
||
ImgPhotoConfigureInstance(instancePtr);
|
||
|
||
/*
|
||
* If this is the first instance, must set the size of the image.
|
||
*/
|
||
|
||
if (instancePtr->nextPtr == NULL) {
|
||
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, 0, 0,
|
||
masterPtr->width, masterPtr->height);
|
||
}
|
||
|
||
/*
|
||
* Dither the image to fill in this instance's pixmap.
|
||
*/
|
||
|
||
TkClipBox(masterPtr->validRegion, &validBox);
|
||
if ((validBox.width > 0) && (validBox.height > 0)) {
|
||
DitherInstance(instancePtr, validBox.x, validBox.y, validBox.width,
|
||
validBox.height);
|
||
}
|
||
|
||
return (ClientData) instancePtr;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoDisplay --
|
||
*
|
||
* This procedure is invoked to draw a photo image.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* A portion of the image gets rendered in a pixmap or window.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ImgPhotoDisplay(clientData, display, drawable, imageX, imageY, width,
|
||
height, drawableX, drawableY)
|
||
ClientData clientData; /* Pointer to PhotoInstance structure for
|
||
* for instance to be displayed. */
|
||
Display *display; /* Display on which to draw image. */
|
||
Drawable drawable; /* Pixmap or window in which to draw image. */
|
||
int imageX, imageY; /* Upper-left corner of region within image
|
||
* to draw. */
|
||
int width, height; /* Dimensions of region within image to draw. */
|
||
int drawableX, drawableY; /* Coordinates within drawable that
|
||
* correspond to imageX and imageY. */
|
||
{
|
||
PhotoInstance *instancePtr = (PhotoInstance *) clientData;
|
||
|
||
/*
|
||
* If there's no pixmap, it means that an error occurred
|
||
* while creating the image instance so it can't be displayed.
|
||
*/
|
||
|
||
if (instancePtr->pixels == None) {
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* masterPtr->region describes which parts of the image contain
|
||
* valid data. We set this region as the clip mask for the gc,
|
||
* setting its origin appropriately, and use it when drawing the
|
||
* image.
|
||
*/
|
||
|
||
TkSetRegion(display, instancePtr->gc, instancePtr->masterPtr->validRegion);
|
||
XSetClipOrigin(display, instancePtr->gc, drawableX - imageX,
|
||
drawableY - imageY);
|
||
XCopyArea(display, instancePtr->pixels, drawable, instancePtr->gc,
|
||
imageX, imageY, (unsigned) width, (unsigned) height,
|
||
drawableX, drawableY);
|
||
XSetClipMask(display, instancePtr->gc, None);
|
||
XSetClipOrigin(display, instancePtr->gc, 0, 0);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoFree --
|
||
*
|
||
* This procedure is called when a widget ceases to use a
|
||
* particular instance of an image. We don't actually get
|
||
* rid of the instance until later because we may be about
|
||
* to get this instance again.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Internal data structures get cleaned up, later.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ImgPhotoFree(clientData, display)
|
||
ClientData clientData; /* Pointer to PhotoInstance structure for
|
||
* for instance to be displayed. */
|
||
Display *display; /* Display containing window that used image. */
|
||
{
|
||
PhotoInstance *instancePtr = (PhotoInstance *) clientData;
|
||
ColorTable *colorPtr;
|
||
|
||
instancePtr->refCount -= 1;
|
||
if (instancePtr->refCount > 0) {
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* There are no more uses of the image within this widget.
|
||
* Decrement the count of live uses of its color table, so
|
||
* that its colors can be reclaimed if necessary, and
|
||
* set up an idle call to free the instance structure.
|
||
*/
|
||
|
||
colorPtr = instancePtr->colorTablePtr;
|
||
if (colorPtr != NULL) {
|
||
colorPtr->liveRefCount -= 1;
|
||
}
|
||
|
||
Tcl_DoWhenIdle(DisposeInstance, (ClientData) instancePtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoDelete --
|
||
*
|
||
* This procedure is called by the image code to delete the
|
||
* master structure for an image.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Resources associated with the image get freed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ImgPhotoDelete(masterData)
|
||
ClientData masterData; /* Pointer to PhotoMaster structure for
|
||
* image. Must not have any more instances. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) masterData;
|
||
PhotoInstance *instancePtr;
|
||
|
||
while ((instancePtr = masterPtr->instancePtr) != NULL) {
|
||
if (instancePtr->refCount > 0) {
|
||
panic("tried to delete photo image when instances still exist");
|
||
}
|
||
Tcl_CancelIdleCall(DisposeInstance, (ClientData) instancePtr);
|
||
DisposeInstance((ClientData) instancePtr);
|
||
}
|
||
masterPtr->tkMaster = NULL;
|
||
if (masterPtr->imageCmd != NULL) {
|
||
Tcl_DeleteCommandFromToken(masterPtr->interp, masterPtr->imageCmd);
|
||
}
|
||
if (masterPtr->pix24 != NULL) {
|
||
ckfree((char *) masterPtr->pix24);
|
||
}
|
||
if (masterPtr->validRegion != NULL) {
|
||
TkDestroyRegion(masterPtr->validRegion);
|
||
}
|
||
Tk_FreeOptions(configSpecs, (char *) masterPtr, (Display *) NULL, 0);
|
||
ckfree((char *) masterPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoCmdDeletedProc --
|
||
*
|
||
* This procedure is invoked when the image command for an image
|
||
* is deleted. It deletes the image.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The image is deleted.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ImgPhotoCmdDeletedProc(clientData)
|
||
ClientData clientData; /* Pointer to PhotoMaster structure for
|
||
* image. */
|
||
{
|
||
PhotoMaster *masterPtr = (PhotoMaster *) clientData;
|
||
|
||
masterPtr->imageCmd = NULL;
|
||
if (masterPtr->tkMaster != NULL) {
|
||
Tk_DeleteImage(masterPtr->interp, Tk_NameOfImage(masterPtr->tkMaster));
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoSetSize --
|
||
*
|
||
* This procedure reallocates the image storage and instance
|
||
* pixmaps for a photo image, as necessary, to change the
|
||
* image's size to `width' x `height' pixels.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Storage gets reallocated, for the master and all its instances.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ImgPhotoSetSize(masterPtr, width, height)
|
||
PhotoMaster *masterPtr;
|
||
int width, height;
|
||
{
|
||
unsigned char *newPix24;
|
||
int h, offset, pitch;
|
||
unsigned char *srcPtr, *destPtr;
|
||
XRectangle validBox, clipBox;
|
||
TkRegion clipRegion;
|
||
PhotoInstance *instancePtr;
|
||
|
||
if (masterPtr->userWidth > 0) {
|
||
width = masterPtr->userWidth;
|
||
}
|
||
if (masterPtr->userHeight > 0) {
|
||
height = masterPtr->userHeight;
|
||
}
|
||
|
||
/*
|
||
* We have to trim the valid region if it is currently
|
||
* larger than the new image size.
|
||
*/
|
||
|
||
TkClipBox(masterPtr->validRegion, &validBox);
|
||
if ((validBox.x + validBox.width > width)
|
||
|| (validBox.y + validBox.height > height)) {
|
||
clipBox.x = 0;
|
||
clipBox.y = 0;
|
||
clipBox.width = width;
|
||
clipBox.height = height;
|
||
clipRegion = TkCreateRegion();
|
||
TkUnionRectWithRegion(&clipBox, clipRegion, clipRegion);
|
||
TkIntersectRegion(masterPtr->validRegion, clipRegion,
|
||
masterPtr->validRegion);
|
||
TkDestroyRegion(clipRegion);
|
||
TkClipBox(masterPtr->validRegion, &validBox);
|
||
}
|
||
|
||
if ((width != masterPtr->width) || (height != masterPtr->height)
|
||
|| (masterPtr->pix24 == NULL)) {
|
||
|
||
/*
|
||
* Reallocate storage for the 24-bit image and copy
|
||
* over valid regions.
|
||
*/
|
||
|
||
pitch = width * 3;
|
||
newPix24 = (unsigned char *) ckalloc((unsigned) (height * pitch));
|
||
|
||
/*
|
||
* Zero the new array. The dithering code shouldn't read the
|
||
* areas outside validBox, but they might be copied to another
|
||
* photo image or written to a file.
|
||
*/
|
||
|
||
if ((masterPtr->pix24 != NULL)
|
||
&& ((width == masterPtr->width) || (width == validBox.width))) {
|
||
if (validBox.y > 0) {
|
||
memset((VOID *) newPix24, 0, (size_t) (validBox.y * pitch));
|
||
}
|
||
h = validBox.y + validBox.height;
|
||
if (h < height) {
|
||
memset((VOID *) (newPix24 + h * pitch), 0,
|
||
(size_t) ((height - h) * pitch));
|
||
}
|
||
} else {
|
||
memset((VOID *) newPix24, 0, (size_t) (height * pitch));
|
||
}
|
||
|
||
if (masterPtr->pix24 != NULL) {
|
||
|
||
/*
|
||
* Copy the common area over to the new array array and
|
||
* free the old array.
|
||
*/
|
||
|
||
if (width == masterPtr->width) {
|
||
|
||
/*
|
||
* The region to be copied is contiguous.
|
||
*/
|
||
|
||
offset = validBox.y * pitch;
|
||
memcpy((VOID *) (newPix24 + offset),
|
||
(VOID *) (masterPtr->pix24 + offset),
|
||
(size_t) (validBox.height * pitch));
|
||
|
||
} else if ((validBox.width > 0) && (validBox.height > 0)) {
|
||
|
||
/*
|
||
* Area to be copied is not contiguous - copy line by line.
|
||
*/
|
||
|
||
destPtr = newPix24 + (validBox.y * width + validBox.x) * 3;
|
||
srcPtr = masterPtr->pix24 + (validBox.y * masterPtr->width
|
||
+ validBox.x) * 3;
|
||
for (h = validBox.height; h > 0; h--) {
|
||
memcpy((VOID *) destPtr, (VOID *) srcPtr,
|
||
(size_t) (validBox.width * 3));
|
||
destPtr += width * 3;
|
||
srcPtr += masterPtr->width * 3;
|
||
}
|
||
}
|
||
|
||
ckfree((char *) masterPtr->pix24);
|
||
}
|
||
|
||
masterPtr->pix24 = newPix24;
|
||
masterPtr->width = width;
|
||
masterPtr->height = height;
|
||
|
||
/*
|
||
* Dithering will be correct up to the end of the last
|
||
* pre-existing complete scanline.
|
||
*/
|
||
|
||
if ((validBox.x > 0) || (validBox.y > 0)) {
|
||
masterPtr->ditherX = 0;
|
||
masterPtr->ditherY = 0;
|
||
} else if (validBox.width == width) {
|
||
if ((int) validBox.height < masterPtr->ditherY) {
|
||
masterPtr->ditherX = 0;
|
||
masterPtr->ditherY = validBox.height;
|
||
}
|
||
} else {
|
||
if ((masterPtr->ditherY > 0)
|
||
|| ((int) validBox.width < masterPtr->ditherX)) {
|
||
masterPtr->ditherX = validBox.width;
|
||
masterPtr->ditherY = 0;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Now adjust the sizes of the pixmaps for all of the instances.
|
||
*/
|
||
|
||
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
||
instancePtr = instancePtr->nextPtr) {
|
||
ImgPhotoInstanceSetSize(instancePtr);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ImgPhotoInstanceSetSize --
|
||
*
|
||
* This procedure reallocates the instance pixmap and dithering
|
||
* error array for a photo instance, as necessary, to change the
|
||
* image's size to `width' x `height' pixels.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Storage gets reallocated, here and in the X server.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ImgPhotoInstanceSetSize(instancePtr)
|
||
PhotoInstance *instancePtr; /* Instance whose size is to be
|
||
* changed. */
|
||
{
|
||
PhotoMaster *masterPtr;
|
||
schar *newError;
|
||
schar *errSrcPtr, *errDestPtr;
|
||
int h, offset;
|
||
XRectangle validBox;
|
||
Pixmap newPixmap;
|
||
|
||
masterPtr = instancePtr->masterPtr;
|
||
TkClipBox(masterPtr->validRegion, &validBox);
|
||
|
||
if ((instancePtr->width != masterPtr->width)
|
||
|| (instancePtr->height != masterPtr->height)
|
||
|| (instancePtr->pixels == None)) {
|
||
newPixmap = Tk_GetPixmap(instancePtr->display,
|
||
RootWindow(instancePtr->display,
|
||
instancePtr->visualInfo.screen),
|
||
(masterPtr->width > 0) ? masterPtr->width: 1,
|
||
(masterPtr->height > 0) ? masterPtr->height: 1,
|
||
instancePtr->visualInfo.depth);
|
||
|
||
/*
|
||
* The following is a gross hack needed to properly support colormaps
|
||
* under Windows. Before the pixels can be copied to the pixmap,
|
||
* the relevent colormap must be associated with the drawable.
|
||
* Normally we can infer this association from the window that
|
||
* was used to create the pixmap. However, in this case we're
|
||
* using the root window, so we have to be more explicit.
|
||
*/
|
||
|
||
TkSetPixmapColormap(newPixmap, instancePtr->colormap);
|
||
|
||
if (instancePtr->pixels != None) {
|
||
/*
|
||
* Copy any common pixels from the old pixmap and free it.
|
||
*/
|
||
XCopyArea(instancePtr->display, instancePtr->pixels, newPixmap,
|
||
instancePtr->gc, validBox.x, validBox.y,
|
||
validBox.width, validBox.height, validBox.x, validBox.y);
|
||
Tk_FreePixmap(instancePtr->display, instancePtr->pixels);
|
||
}
|
||
instancePtr->pixels = newPixmap;
|
||
}
|
||
|
||
if ((instancePtr->width != masterPtr->width)
|
||
|| (instancePtr->height != masterPtr->height)
|
||
|| (instancePtr->error == NULL)) {
|
||
|
||
newError = (schar *) ckalloc((unsigned)
|
||
(masterPtr->height * masterPtr->width * 3 * sizeof(schar)));
|
||
|
||
/*
|
||
* Zero the new array so that we don't get bogus error values
|
||
* propagating into areas we dither later.
|
||
*/
|
||
|
||
if ((instancePtr->error != NULL)
|
||
&& ((instancePtr->width == masterPtr->width)
|
||
|| (validBox.width == masterPtr->width))) {
|
||
if (validBox.y > 0) {
|
||
memset((VOID *) newError, 0, (size_t)
|
||
(validBox.y * masterPtr->width * 3 * sizeof(schar)));
|
||
}
|
||
h = validBox.y + validBox.height;
|
||
if (h < masterPtr->height) {
|
||
memset((VOID *) (newError + h * masterPtr->width * 3), 0,
|
||
(size_t) ((masterPtr->height - h)
|
||
* masterPtr->width * 3 * sizeof(schar)));
|
||
}
|
||
} else {
|
||
memset((VOID *) newError, 0, (size_t)
|
||
(masterPtr->height * masterPtr->width * 3 * sizeof(schar)));
|
||
}
|
||
|
||
if (instancePtr->error != NULL) {
|
||
|
||
/*
|
||
* Copy the common area over to the new array
|
||
* and free the old array.
|
||
*/
|
||
|
||
if (masterPtr->width == instancePtr->width) {
|
||
|
||
offset = validBox.y * masterPtr->width * 3;
|
||
memcpy((VOID *) (newError + offset),
|
||
(VOID *) (instancePtr->error + offset),
|
||
(size_t) (validBox.height
|
||
* masterPtr->width * 3 * sizeof(schar)));
|
||
|
||
} else if (validBox.width > 0 && validBox.height > 0) {
|
||
|
||
errDestPtr = newError
|
||
+ (validBox.y * masterPtr->width + validBox.x) * 3;
|
||
errSrcPtr = instancePtr->error
|
||
+ (validBox.y * instancePtr->width + validBox.x) * 3;
|
||
for (h = validBox.height; h > 0; --h) {
|
||
memcpy((VOID *) errDestPtr, (VOID *) errSrcPtr,
|
||
validBox.width * 3 * sizeof(schar));
|
||
errDestPtr += masterPtr->width * 3;
|
||
errSrcPtr += instancePtr->width * 3;
|
||
}
|
||
}
|
||
ckfree((char *) instancePtr->error);
|
||
}
|
||
|
||
instancePtr->error = newError;
|
||
}
|
||
|
||
instancePtr->width = masterPtr->width;
|
||
instancePtr->height = masterPtr->height;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* IsValidPalette --
|
||
*
|
||
* This procedure is called to check whether a value given for
|
||
* the -palette option is valid for a particular instance
|
||
* of a photo image.
|
||
*
|
||
* Results:
|
||
* A boolean value: 1 if the palette is acceptable, 0 otherwise.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
IsValidPalette(instancePtr, palette)
|
||
PhotoInstance *instancePtr; /* Instance to which the palette
|
||
* specification is to be applied. */
|
||
char *palette; /* Palette specification string. */
|
||
{
|
||
int nRed, nGreen, nBlue, mono, numColors;
|
||
char *endp;
|
||
|
||
/*
|
||
* First parse the specification: it must be of the form
|
||
* %d or %d/%d/%d.
|
||
*/
|
||
|
||
nRed = strtol(palette, &endp, 10);
|
||
if ((endp == palette) || ((*endp != 0) && (*endp != '/'))
|
||
|| (nRed < 2) || (nRed > 256)) {
|
||
return 0;
|
||
}
|
||
|
||
if (*endp == 0) {
|
||
mono = 1;
|
||
nGreen = nBlue = nRed;
|
||
} else {
|
||
palette = endp + 1;
|
||
nGreen = strtol(palette, &endp, 10);
|
||
if ((endp == palette) || (*endp != '/') || (nGreen < 2)
|
||
|| (nGreen > 256)) {
|
||
return 0;
|
||
}
|
||
palette = endp + 1;
|
||
nBlue = strtol(palette, &endp, 10);
|
||
if ((endp == palette) || (*endp != 0) || (nBlue < 2)
|
||
|| (nBlue > 256)) {
|
||
return 0;
|
||
}
|
||
mono = 0;
|
||
}
|
||
|
||
switch (instancePtr->visualInfo.class) {
|
||
case DirectColor:
|
||
case TrueColor:
|
||
if ((nRed > (1 << CountBits(instancePtr->visualInfo.red_mask)))
|
||
|| (nGreen > (1
|
||
<< CountBits(instancePtr->visualInfo.green_mask)))
|
||
|| (nBlue > (1
|
||
<< CountBits(instancePtr->visualInfo.blue_mask)))) {
|
||
return 0;
|
||
}
|
||
break;
|
||
case PseudoColor:
|
||
case StaticColor:
|
||
numColors = nRed;
|
||
if (!mono) {
|
||
numColors *= nGreen*nBlue;
|
||
}
|
||
if (numColors > (1 << instancePtr->visualInfo.depth)) {
|
||
return 0;
|
||
}
|
||
break;
|
||
case GrayScale:
|
||
case StaticGray:
|
||
if (!mono || (nRed > (1 << instancePtr->visualInfo.depth))) {
|
||
return 0;
|
||
}
|
||
break;
|
||
}
|
||
|
||
return 1;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* CountBits --
|
||
*
|
||
* This procedure counts how many bits are set to 1 in `mask'.
|
||
*
|
||
* Results:
|
||
* The integer number of bits.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
CountBits(mask)
|
||
pixel mask; /* Value to count the 1 bits in. */
|
||
{
|
||
int n;
|
||
|
||
for( n = 0; mask != 0; mask &= mask - 1 )
|
||
n++;
|
||
return n;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* GetColorTable --
|
||
*
|
||
* This procedure is called to allocate a table of colormap
|
||
* information for an instance of a photo image. Only one such
|
||
* table is allocated for all photo instances using the same
|
||
* display, colormap, palette and gamma values, so that the
|
||
* application need only request a set of colors from the X
|
||
* server once for all such photo widgets. This procedure
|
||
* maintains a hash table to find previously-allocated
|
||
* ColorTables.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* A new ColorTable may be allocated and placed in the hash
|
||
* table, and have colors allocated for it.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
GetColorTable(instancePtr)
|
||
PhotoInstance *instancePtr; /* Instance needing a color table. */
|
||
{
|
||
ColorTable *colorPtr;
|
||
Tcl_HashEntry *entry;
|
||
ColorTableId id;
|
||
int isNew;
|
||
|
||
/*
|
||
* Look for an existing ColorTable in the hash table.
|
||
*/
|
||
|
||
memset((VOID *) &id, 0, sizeof(id));
|
||
id.display = instancePtr->display;
|
||
id.colormap = instancePtr->colormap;
|
||
id.palette = instancePtr->palette;
|
||
id.gamma = instancePtr->gamma;
|
||
if (!imgPhotoColorHashInitialized) {
|
||
Tcl_InitHashTable(&imgPhotoColorHash, N_COLOR_HASH);
|
||
imgPhotoColorHashInitialized = 1;
|
||
}
|
||
entry = Tcl_CreateHashEntry(&imgPhotoColorHash, (char *) &id, &isNew);
|
||
|
||
if (!isNew) {
|
||
/*
|
||
* Re-use the existing entry.
|
||
*/
|
||
|
||
colorPtr = (ColorTable *) Tcl_GetHashValue(entry);
|
||
|
||
} else {
|
||
/*
|
||
* No color table currently available; need to make one.
|
||
*/
|
||
|
||
colorPtr = (ColorTable *) ckalloc(sizeof(ColorTable));
|
||
|
||
/*
|
||
* The following line of code should not normally be needed due
|
||
* to the assignment in the following line. However, it compensates
|
||
* for bugs in some compilers (HP, for example) where
|
||
* sizeof(ColorTable) is 24 but the assignment only copies 20 bytes,
|
||
* leaving 4 bytes uninitialized; these cause problems when using
|
||
* the id for lookups in imgPhotoColorHash, and can result in
|
||
* core dumps.
|
||
*/
|
||
|
||
memset((VOID *) &colorPtr->id, 0, sizeof(ColorTableId));
|
||
colorPtr->id = id;
|
||
Tk_PreserveColormap(colorPtr->id.display, colorPtr->id.colormap);
|
||
colorPtr->flags = 0;
|
||
colorPtr->refCount = 0;
|
||
colorPtr->liveRefCount = 0;
|
||
colorPtr->numColors = 0;
|
||
colorPtr->visualInfo = instancePtr->visualInfo;
|
||
colorPtr->pixelMap = NULL;
|
||
Tcl_SetHashValue(entry, colorPtr);
|
||
}
|
||
|
||
colorPtr->refCount++;
|
||
colorPtr->liveRefCount++;
|
||
instancePtr->colorTablePtr = colorPtr;
|
||
if (colorPtr->flags & DISPOSE_PENDING) {
|
||
Tcl_CancelIdleCall(DisposeColorTable, (ClientData) colorPtr);
|
||
colorPtr->flags &= ~DISPOSE_PENDING;
|
||
}
|
||
|
||
/*
|
||
* Allocate colors for this color table if necessary.
|
||
*/
|
||
|
||
if ((colorPtr->numColors == 0)
|
||
&& ((colorPtr->flags & BLACK_AND_WHITE) == 0)) {
|
||
AllocateColors(colorPtr);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* FreeColorTable --
|
||
*
|
||
* This procedure is called when an instance ceases using a
|
||
* color table.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* If no other instances are using this color table, a when-idle
|
||
* handler is registered to free up the color table and the colors
|
||
* allocated for it.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
FreeColorTable(colorPtr)
|
||
ColorTable *colorPtr; /* Pointer to the color table which is
|
||
* no longer required by an instance. */
|
||
{
|
||
colorPtr->refCount--;
|
||
if (colorPtr->refCount > 0) {
|
||
return;
|
||
}
|
||
if ((colorPtr->flags & DISPOSE_PENDING) == 0) {
|
||
Tcl_DoWhenIdle(DisposeColorTable, (ClientData) colorPtr);
|
||
colorPtr->flags |= DISPOSE_PENDING;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* AllocateColors --
|
||
*
|
||
* This procedure allocates the colors required by a color table,
|
||
* and sets up the fields in the color table data structure which
|
||
* are used in dithering.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Colors are allocated from the X server. Fields in the
|
||
* color table data structure are updated.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
AllocateColors(colorPtr)
|
||
ColorTable *colorPtr; /* Pointer to the color table requiring
|
||
* colors to be allocated. */
|
||
{
|
||
int i, r, g, b, rMult, mono;
|
||
int numColors, nRed, nGreen, nBlue;
|
||
double fr, fg, fb, igam;
|
||
XColor *colors;
|
||
unsigned long *pixels;
|
||
|
||
/* 16-bit intensity value for i/n of full intensity. */
|
||
# define CFRAC(i, n) ((i) * 65535 / (n))
|
||
|
||
/* As for CFRAC, but apply exponent of g. */
|
||
# define CGFRAC(i, n, g) ((int)(65535 * pow((double)(i) / (n), (g))))
|
||
|
||
/*
|
||
* First parse the palette specification to get the required number of
|
||
* shades of each primary.
|
||
*/
|
||
|
||
mono = sscanf(colorPtr->id.palette, "%d/%d/%d", &nRed, &nGreen, &nBlue)
|
||
<= 1;
|
||
igam = 1.0 / colorPtr->id.gamma;
|
||
|
||
/*
|
||
* Each time around this loop, we reduce the number of colors we're
|
||
* trying to allocate until we succeed in allocating all of the colors
|
||
* we need.
|
||
*/
|
||
|
||
for (;;) {
|
||
/*
|
||
* If we are using 1 bit/pixel, we don't need to allocate
|
||
* any colors (we just use the foreground and background
|
||
* colors in the GC).
|
||
*/
|
||
|
||
if (mono && (nRed <= 2)) {
|
||
colorPtr->flags |= BLACK_AND_WHITE;
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Calculate the RGB coordinates of the colors we want to
|
||
* allocate and store them in *colors.
|
||
*/
|
||
|
||
if ((colorPtr->visualInfo.class == DirectColor)
|
||
|| (colorPtr->visualInfo.class == TrueColor)) {
|
||
|
||
/*
|
||
* Direct/True Color: allocate shades of red, green, blue
|
||
* independently.
|
||
*/
|
||
|
||
if (mono) {
|
||
numColors = nGreen = nBlue = nRed;
|
||
} else {
|
||
numColors = MAX(MAX(nRed, nGreen), nBlue);
|
||
}
|
||
colors = (XColor *) ckalloc(numColors * sizeof(XColor));
|
||
|
||
for (i = 0; i < numColors; ++i) {
|
||
if (igam == 1.0) {
|
||
colors[i].red = CFRAC(i, nRed - 1);
|
||
colors[i].green = CFRAC(i, nGreen - 1);
|
||
colors[i].blue = CFRAC(i, nBlue - 1);
|
||
} else {
|
||
colors[i].red = CGFRAC(i, nRed - 1, igam);
|
||
colors[i].green = CGFRAC(i, nGreen - 1, igam);
|
||
colors[i].blue = CGFRAC(i, nBlue - 1, igam);
|
||
}
|
||
}
|
||
} else {
|
||
/*
|
||
* PseudoColor, StaticColor, GrayScale or StaticGray visual:
|
||
* we have to allocate each color in the color cube separately.
|
||
*/
|
||
|
||
numColors = (mono) ? nRed: (nRed * nGreen * nBlue);
|
||
colors = (XColor *) ckalloc(numColors * sizeof(XColor));
|
||
|
||
if (!mono) {
|
||
/*
|
||
* Color display using a PseudoColor or StaticColor visual.
|
||
*/
|
||
|
||
i = 0;
|
||
for (r = 0; r < nRed; ++r) {
|
||
for (g = 0; g < nGreen; ++g) {
|
||
for (b = 0; b < nBlue; ++b) {
|
||
if (igam == 1.0) {
|
||
colors[i].red = CFRAC(r, nRed - 1);
|
||
colors[i].green = CFRAC(g, nGreen - 1);
|
||
colors[i].blue = CFRAC(b, nBlue - 1);
|
||
} else {
|
||
colors[i].red = CGFRAC(r, nRed - 1, igam);
|
||
colors[i].green = CGFRAC(g, nGreen - 1, igam);
|
||
colors[i].blue = CGFRAC(b, nBlue - 1, igam);
|
||
}
|
||
i++;
|
||
}
|
||
}
|
||
}
|
||
} else {
|
||
/*
|
||
* Monochrome display - allocate the shades of grey we want.
|
||
*/
|
||
|
||
for (i = 0; i < numColors; ++i) {
|
||
if (igam == 1.0) {
|
||
r = CFRAC(i, numColors - 1);
|
||
} else {
|
||
r = CGFRAC(i, numColors - 1, igam);
|
||
}
|
||
colors[i].red = colors[i].green = colors[i].blue = r;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Now try to allocate the colors we've calculated.
|
||
*/
|
||
|
||
pixels = (unsigned long *) ckalloc(numColors * sizeof(unsigned long));
|
||
for (i = 0; i < numColors; ++i) {
|
||
if (!XAllocColor(colorPtr->id.display, colorPtr->id.colormap,
|
||
&colors[i])) {
|
||
|
||
/*
|
||
* Can't get all the colors we want in the default colormap;
|
||
* first try freeing colors from other unused color tables.
|
||
*/
|
||
|
||
if (!ReclaimColors(&colorPtr->id, numColors - i)
|
||
|| !XAllocColor(colorPtr->id.display,
|
||
colorPtr->id.colormap, &colors[i])) {
|
||
/*
|
||
* Still can't allocate the color.
|
||
*/
|
||
break;
|
||
}
|
||
}
|
||
pixels[i] = colors[i].pixel;
|
||
}
|
||
|
||
/*
|
||
* If we didn't get all of the colors, reduce the
|
||
* resolution of the color cube, free the ones we got,
|
||
* and try again.
|
||
*/
|
||
|
||
if (i >= numColors) {
|
||
break;
|
||
}
|
||
XFreeColors(colorPtr->id.display, colorPtr->id.colormap, pixels, i, 0);
|
||
ckfree((char *) colors);
|
||
ckfree((char *) pixels);
|
||
|
||
if (!mono) {
|
||
if ((nRed == 2) && (nGreen == 2) && (nBlue == 2)) {
|
||
/*
|
||
* Fall back to 1-bit monochrome display.
|
||
*/
|
||
|
||
mono = 1;
|
||
} else {
|
||
/*
|
||
* Reduce the number of shades of each primary to about
|
||
* 3/4 of the previous value. This should reduce the
|
||
* total number of colors required to about half the
|
||
* previous value for PseudoColor displays.
|
||
*/
|
||
|
||
nRed = (nRed * 3 + 2) / 4;
|
||
nGreen = (nGreen * 3 + 2) / 4;
|
||
nBlue = (nBlue * 3 + 2) / 4;
|
||
}
|
||
} else {
|
||
/*
|
||
* Reduce the number of shades of gray to about 1/2.
|
||
*/
|
||
|
||
nRed = nRed / 2;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* We have allocated all of the necessary colors:
|
||
* fill in various fields of the ColorTable record.
|
||
*/
|
||
|
||
if (!mono) {
|
||
colorPtr->flags |= COLOR_WINDOW;
|
||
|
||
/*
|
||
* The following is a hairy hack. We only want to index into
|
||
* the pixelMap on colormap displays. However, if the display
|
||
* is on Windows, then we actually want to store the index not
|
||
* the value since we will be passing the color table into the
|
||
* TkPutImage call.
|
||
*/
|
||
|
||
#ifndef __WIN32__
|
||
if ((colorPtr->visualInfo.class != DirectColor)
|
||
&& (colorPtr->visualInfo.class != TrueColor)) {
|
||
colorPtr->flags |= MAP_COLORS;
|
||
}
|
||
#endif /* __WIN32__ */
|
||
}
|
||
|
||
colorPtr->numColors = numColors;
|
||
colorPtr->pixelMap = pixels;
|
||
|
||
/*
|
||
* Set up quantization tables for dithering.
|
||
*/
|
||
rMult = nGreen * nBlue;
|
||
for (i = 0; i < 256; ++i) {
|
||
r = (i * (nRed - 1) + 127) / 255;
|
||
if (mono) {
|
||
fr = (double) colors[r].red / 65535.0;
|
||
if (colorPtr->id.gamma != 1.0 ) {
|
||
fr = pow(fr, colorPtr->id.gamma);
|
||
}
|
||
colorPtr->colorQuant[0][i] = (int)(fr * 255.99);
|
||
colorPtr->redValues[i] = colors[r].pixel;
|
||
} else {
|
||
g = (i * (nGreen - 1) + 127) / 255;
|
||
b = (i * (nBlue - 1) + 127) / 255;
|
||
if ((colorPtr->visualInfo.class == DirectColor)
|
||
|| (colorPtr->visualInfo.class == TrueColor)) {
|
||
colorPtr->redValues[i] = colors[r].pixel
|
||
& colorPtr->visualInfo.red_mask;
|
||
colorPtr->greenValues[i] = colors[g].pixel
|
||
& colorPtr->visualInfo.green_mask;
|
||
colorPtr->blueValues[i] = colors[b].pixel
|
||
& colorPtr->visualInfo.blue_mask;
|
||
} else {
|
||
r *= rMult;
|
||
g *= nBlue;
|
||
colorPtr->redValues[i] = r;
|
||
colorPtr->greenValues[i] = g;
|
||
colorPtr->blueValues[i] = b;
|
||
}
|
||
fr = (double) colors[r].red / 65535.0;
|
||
fg = (double) colors[g].green / 65535.0;
|
||
fb = (double) colors[b].blue / 65535.0;
|
||
if (colorPtr->id.gamma != 1.0) {
|
||
fr = pow(fr, colorPtr->id.gamma);
|
||
fg = pow(fg, colorPtr->id.gamma);
|
||
fb = pow(fb, colorPtr->id.gamma);
|
||
}
|
||
colorPtr->colorQuant[0][i] = (int)(fr * 255.99);
|
||
colorPtr->colorQuant[1][i] = (int)(fg * 255.99);
|
||
colorPtr->colorQuant[2][i] = (int)(fb * 255.99);
|
||
}
|
||
}
|
||
|
||
ckfree((char *) colors);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* DisposeColorTable --
|
||
*
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The colors in the argument color table are freed, as is the
|
||
* color table structure itself. The color table is removed
|
||
* from the hash table which is used to locate color tables.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DisposeColorTable(clientData)
|
||
ClientData clientData; /* Pointer to the ColorTable whose
|
||
* colors are to be released. */
|
||
{
|
||
ColorTable *colorPtr;
|
||
Tcl_HashEntry *entry;
|
||
|
||
colorPtr = (ColorTable *) clientData;
|
||
if (colorPtr->pixelMap != NULL) {
|
||
if (colorPtr->numColors > 0) {
|
||
XFreeColors(colorPtr->id.display, colorPtr->id.colormap,
|
||
colorPtr->pixelMap, colorPtr->numColors, 0);
|
||
Tk_FreeColormap(colorPtr->id.display, colorPtr->id.colormap);
|
||
}
|
||
ckfree((char *) colorPtr->pixelMap);
|
||
}
|
||
|
||
entry = Tcl_FindHashEntry(&imgPhotoColorHash, (char *) &colorPtr->id);
|
||
if (entry == NULL) {
|
||
panic("DisposeColorTable couldn't find hash entry");
|
||
}
|
||
Tcl_DeleteHashEntry(entry);
|
||
|
||
ckfree((char *) colorPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ReclaimColors --
|
||
*
|
||
* This procedure is called to try to free up colors in the
|
||
* colormap used by a color table. It looks for other color
|
||
* tables with the same colormap and with a zero live reference
|
||
* count, and frees their colors. It only does so if there is
|
||
* the possibility of freeing up at least `numColors' colors.
|
||
*
|
||
* Results:
|
||
* The return value is TRUE if any colors were freed, FALSE
|
||
* otherwise.
|
||
*
|
||
* Side effects:
|
||
* ColorTables which are not currently in use may lose their
|
||
* color allocations.
|
||
*
|
||
*---------------------------------------------------------------------- */
|
||
|
||
static int
|
||
ReclaimColors(id, numColors)
|
||
ColorTableId *id; /* Pointer to information identifying
|
||
* the color table which needs more colors. */
|
||
int numColors; /* Number of colors required. */
|
||
{
|
||
Tcl_HashSearch srch;
|
||
Tcl_HashEntry *entry;
|
||
ColorTable *colorPtr;
|
||
int nAvail;
|
||
|
||
/*
|
||
* First scan through the color hash table to get an
|
||
* upper bound on how many colors we might be able to free.
|
||
*/
|
||
|
||
nAvail = 0;
|
||
entry = Tcl_FirstHashEntry(&imgPhotoColorHash, &srch);
|
||
while (entry != NULL) {
|
||
colorPtr = (ColorTable *) Tcl_GetHashValue(entry);
|
||
if ((colorPtr->id.display == id->display)
|
||
&& (colorPtr->id.colormap == id->colormap)
|
||
&& (colorPtr->liveRefCount == 0 )&& (colorPtr->numColors != 0)
|
||
&& ((colorPtr->id.palette != id->palette)
|
||
|| (colorPtr->id.gamma != id->gamma))) {
|
||
|
||
/*
|
||
* We could take this guy's colors off him.
|
||
*/
|
||
|
||
nAvail += colorPtr->numColors;
|
||
}
|
||
entry = Tcl_NextHashEntry(&srch);
|
||
}
|
||
|
||
/*
|
||
* nAvail is an (over)estimate of the number of colors we could free.
|
||
*/
|
||
|
||
if (nAvail < numColors) {
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Scan through a second time freeing colors.
|
||
*/
|
||
|
||
entry = Tcl_FirstHashEntry(&imgPhotoColorHash, &srch);
|
||
while ((entry != NULL) && (numColors > 0)) {
|
||
colorPtr = (ColorTable *) Tcl_GetHashValue(entry);
|
||
if ((colorPtr->id.display == id->display)
|
||
&& (colorPtr->id.colormap == id->colormap)
|
||
&& (colorPtr->liveRefCount == 0) && (colorPtr->numColors != 0)
|
||
&& ((colorPtr->id.palette != id->palette)
|
||
|| (colorPtr->id.gamma != id->gamma))) {
|
||
|
||
/*
|
||
* Free the colors that this ColorTable has.
|
||
*/
|
||
|
||
XFreeColors(colorPtr->id.display, colorPtr->id.colormap,
|
||
colorPtr->pixelMap, colorPtr->numColors, 0);
|
||
numColors -= colorPtr->numColors;
|
||
colorPtr->numColors = 0;
|
||
ckfree((char *) colorPtr->pixelMap);
|
||
colorPtr->pixelMap = NULL;
|
||
}
|
||
|
||
entry = Tcl_NextHashEntry(&srch);
|
||
}
|
||
return 1; /* we freed some colors */
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* DisposeInstance --
|
||
*
|
||
* This procedure is called to finally free up an instance
|
||
* of a photo image which is no longer required.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The instance data structure and the resources it references
|
||
* are freed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DisposeInstance(clientData)
|
||
ClientData clientData; /* Pointer to the instance whose resources
|
||
* are to be released. */
|
||
{
|
||
PhotoInstance *instancePtr = (PhotoInstance *) clientData;
|
||
PhotoInstance *prevPtr;
|
||
|
||
if (instancePtr->pixels != None) {
|
||
Tk_FreePixmap(instancePtr->display, instancePtr->pixels);
|
||
}
|
||
if (instancePtr->gc != None) {
|
||
Tk_FreeGC(instancePtr->display, instancePtr->gc);
|
||
}
|
||
if (instancePtr->imagePtr != NULL) {
|
||
XFree((char *) instancePtr->imagePtr);
|
||
}
|
||
if (instancePtr->error != NULL) {
|
||
ckfree((char *) instancePtr->error);
|
||
}
|
||
if (instancePtr->colorTablePtr != NULL) {
|
||
FreeColorTable(instancePtr->colorTablePtr);
|
||
}
|
||
|
||
if (instancePtr->masterPtr->instancePtr == instancePtr) {
|
||
instancePtr->masterPtr->instancePtr = instancePtr->nextPtr;
|
||
} else {
|
||
for (prevPtr = instancePtr->masterPtr->instancePtr;
|
||
prevPtr->nextPtr != instancePtr; prevPtr = prevPtr->nextPtr) {
|
||
/* Empty loop body */
|
||
}
|
||
prevPtr->nextPtr = instancePtr->nextPtr;
|
||
}
|
||
Tk_FreeColormap(instancePtr->display, instancePtr->colormap);
|
||
ckfree((char *) instancePtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* MatchFileFormat --
|
||
*
|
||
* This procedure is called to find a photo image file format
|
||
* handler which can parse the image data in the given file.
|
||
* If a user-specified format string is provided, only handlers
|
||
* whose names match a prefix of the format string are tried.
|
||
*
|
||
* Results:
|
||
* A standard TCL return value. If the return value is TCL_OK, a
|
||
* pointer to the image format record is returned in
|
||
* *imageFormatPtr, and the width and height of the image are
|
||
* returned in *widthPtr and *heightPtr.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
MatchFileFormat(interp, chan, fileName, formatString, imageFormatPtr,
|
||
widthPtr, heightPtr)
|
||
Tcl_Interp *interp; /* Interpreter to use for reporting errors. */
|
||
Tcl_Channel chan; /* The image file, open for reading. */
|
||
char *fileName; /* The name of the image file. */
|
||
char *formatString; /* User-specified format string, or NULL. */
|
||
Tk_PhotoImageFormat **imageFormatPtr;
|
||
/* A pointer to the photo image format
|
||
* record is returned here. */
|
||
int *widthPtr, *heightPtr; /* The dimensions of the image are
|
||
* returned here. */
|
||
{
|
||
int matched;
|
||
Tk_PhotoImageFormat *formatPtr;
|
||
|
||
/*
|
||
* Scan through the table of file format handlers to find
|
||
* one which can handle the image.
|
||
*/
|
||
|
||
matched = 0;
|
||
for (formatPtr = formatList; formatPtr != NULL;
|
||
formatPtr = formatPtr->nextPtr) {
|
||
if (formatString != NULL) {
|
||
if (strncasecmp(formatString, formatPtr->name,
|
||
strlen(formatPtr->name)) != 0) {
|
||
continue;
|
||
}
|
||
matched = 1;
|
||
if (formatPtr->fileMatchProc == NULL) {
|
||
Tcl_AppendResult(interp, "-file option isn't supported for ",
|
||
formatString, " images", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
if (formatPtr->fileMatchProc != NULL) {
|
||
(void) Tcl_Seek(chan, 0L, SEEK_SET);
|
||
|
||
if ((*formatPtr->fileMatchProc)(chan, fileName, formatString,
|
||
widthPtr, heightPtr)) {
|
||
if (*widthPtr < 1) {
|
||
*widthPtr = 1;
|
||
}
|
||
if (*heightPtr < 1) {
|
||
*heightPtr = 1;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (formatPtr == NULL) {
|
||
if ((formatString != NULL) && !matched) {
|
||
Tcl_AppendResult(interp, "image file format \"", formatString,
|
||
"\" is not supported", (char *) NULL);
|
||
} else {
|
||
Tcl_AppendResult(interp,
|
||
"couldn't recognize data in image file \"",
|
||
fileName, "\"", (char *) NULL);
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
*imageFormatPtr = formatPtr;
|
||
(void) Tcl_Seek(chan, 0L, SEEK_SET);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* MatchStringFormat --
|
||
*
|
||
* This procedure is called to find a photo image file format
|
||
* handler which can parse the image data in the given string.
|
||
* If a user-specified format string is provided, only handlers
|
||
* whose names match a prefix of the format string are tried.
|
||
*
|
||
* Results:
|
||
* A standard TCL return value. If the return value is TCL_OK, a
|
||
* pointer to the image format record is returned in
|
||
* *imageFormatPtr, and the width and height of the image are
|
||
* returned in *widthPtr and *heightPtr.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
MatchStringFormat(interp, string, formatString, imageFormatPtr,
|
||
widthPtr, heightPtr)
|
||
Tcl_Interp *interp; /* Interpreter to use for reporting errors. */
|
||
char *string; /* String containing the image data. */
|
||
char *formatString; /* User-specified format string, or NULL. */
|
||
Tk_PhotoImageFormat **imageFormatPtr;
|
||
/* A pointer to the photo image format
|
||
* record is returned here. */
|
||
int *widthPtr, *heightPtr; /* The dimensions of the image are
|
||
* returned here. */
|
||
{
|
||
int matched;
|
||
Tk_PhotoImageFormat *formatPtr;
|
||
|
||
/*
|
||
* Scan through the table of file format handlers to find
|
||
* one which can handle the image.
|
||
*/
|
||
|
||
matched = 0;
|
||
for (formatPtr = formatList; formatPtr != NULL;
|
||
formatPtr = formatPtr->nextPtr) {
|
||
if (formatString != NULL) {
|
||
if (strncasecmp(formatString, formatPtr->name,
|
||
strlen(formatPtr->name)) != 0) {
|
||
continue;
|
||
}
|
||
matched = 1;
|
||
if (formatPtr->stringMatchProc == NULL) {
|
||
Tcl_AppendResult(interp, "-data option isn't supported for ",
|
||
formatString, " images", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
if ((formatPtr->stringMatchProc != NULL)
|
||
&& (*formatPtr->stringMatchProc)(string, formatString,
|
||
widthPtr, heightPtr)) {
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (formatPtr == NULL) {
|
||
if ((formatString != NULL) && !matched) {
|
||
Tcl_AppendResult(interp, "image format \"", formatString,
|
||
"\" is not supported", (char *) NULL);
|
||
} else {
|
||
Tcl_AppendResult(interp, "couldn't recognize image data",
|
||
(char *) NULL);
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
*imageFormatPtr = formatPtr;
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_FindPhoto --
|
||
*
|
||
* This procedure is called to get an opaque handle (actually a
|
||
* PhotoMaster *) for a given image, which can be used in
|
||
* subsequent calls to Tk_PhotoPutBlock, etc. The `name'
|
||
* parameter is the name of the image.
|
||
*
|
||
* Results:
|
||
* The handle for the photo image, or NULL if there is no
|
||
* photo image with the name given.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tk_PhotoHandle
|
||
Tk_FindPhoto(interp, imageName)
|
||
Tcl_Interp *interp; /* Interpreter (application) in which image
|
||
* exists. */
|
||
char *imageName; /* Name of the desired photo image. */
|
||
{
|
||
ClientData clientData;
|
||
Tk_ImageType *typePtr;
|
||
|
||
clientData = Tk_GetImageMasterData(interp, imageName, &typePtr);
|
||
if (typePtr != &tkPhotoImageType) {
|
||
return NULL;
|
||
}
|
||
return (Tk_PhotoHandle) clientData;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoPutBlock --
|
||
*
|
||
* This procedure is called to put image data into a photo image.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The image data is stored. The image may be expanded.
|
||
* The Tk image code is informed that the image has changed.
|
||
*
|
||
*---------------------------------------------------------------------- */
|
||
|
||
void
|
||
Tk_PhotoPutBlock(handle, blockPtr, x, y, width, height)
|
||
Tk_PhotoHandle handle; /* Opaque handle for the photo image
|
||
* to be updated. */
|
||
register Tk_PhotoImageBlock *blockPtr;
|
||
/* Pointer to a structure describing the
|
||
* pixel data to be copied into the image. */
|
||
int x, y; /* Coordinates of the top-left pixel to
|
||
* be updated in the image. */
|
||
int width, height; /* Dimensions of the area of the image
|
||
* to be updated. */
|
||
{
|
||
register PhotoMaster *masterPtr;
|
||
int xEnd, yEnd;
|
||
int greenOffset, blueOffset;
|
||
int wLeft, hLeft;
|
||
int wCopy, hCopy;
|
||
unsigned char *srcPtr, *srcLinePtr;
|
||
unsigned char *destPtr, *destLinePtr;
|
||
int pitch;
|
||
XRectangle rect;
|
||
|
||
masterPtr = (PhotoMaster *) handle;
|
||
|
||
if ((masterPtr->userWidth != 0) && ((x + width) > masterPtr->userWidth)) {
|
||
width = masterPtr->userWidth - x;
|
||
}
|
||
if ((masterPtr->userHeight != 0)
|
||
&& ((y + height) > masterPtr->userHeight)) {
|
||
height = masterPtr->userHeight - y;
|
||
}
|
||
if ((width <= 0) || (height <= 0))
|
||
return;
|
||
|
||
xEnd = x + width;
|
||
yEnd = y + height;
|
||
if ((xEnd > masterPtr->width) || (yEnd > masterPtr->height)) {
|
||
ImgPhotoSetSize(masterPtr, MAX(xEnd, masterPtr->width),
|
||
MAX(yEnd, masterPtr->height));
|
||
}
|
||
|
||
if ((y < masterPtr->ditherY) || ((y == masterPtr->ditherY)
|
||
&& (x < masterPtr->ditherX))) {
|
||
/*
|
||
* The dithering isn't correct past the start of this block.
|
||
*/
|
||
masterPtr->ditherX = x;
|
||
masterPtr->ditherY = y;
|
||
}
|
||
|
||
/*
|
||
* If this image block could have different red, green and blue
|
||
* components, mark it as a color image.
|
||
*/
|
||
|
||
greenOffset = blockPtr->offset[1] - blockPtr->offset[0];
|
||
blueOffset = blockPtr->offset[2] - blockPtr->offset[0];
|
||
if ((greenOffset != 0) || (blueOffset != 0)) {
|
||
masterPtr->flags |= COLOR_IMAGE;
|
||
}
|
||
|
||
/*
|
||
* Copy the data into our local 24-bit/pixel array.
|
||
* If we can do it with a single memcpy, we do.
|
||
*/
|
||
|
||
destLinePtr = masterPtr->pix24 + (y * masterPtr->width + x) * 3;
|
||
pitch = masterPtr->width * 3;
|
||
|
||
if ((blockPtr->pixelSize == 3) && (greenOffset == 1) && (blueOffset == 2)
|
||
&& (width <= blockPtr->width) && (height <= blockPtr->height)
|
||
&& ((height == 1) || ((x == 0) && (width == masterPtr->width)
|
||
&& (blockPtr->pitch == pitch)))) {
|
||
memcpy((VOID *) destLinePtr,
|
||
(VOID *) (blockPtr->pixelPtr + blockPtr->offset[0]),
|
||
(size_t) (height * width * 3));
|
||
} else {
|
||
for (hLeft = height; hLeft > 0;) {
|
||
srcLinePtr = blockPtr->pixelPtr + blockPtr->offset[0];
|
||
hCopy = MIN(hLeft, blockPtr->height);
|
||
hLeft -= hCopy;
|
||
for (; hCopy > 0; --hCopy) {
|
||
destPtr = destLinePtr;
|
||
for (wLeft = width; wLeft > 0;) {
|
||
wCopy = MIN(wLeft, blockPtr->width);
|
||
wLeft -= wCopy;
|
||
srcPtr = srcLinePtr;
|
||
for (; wCopy > 0; --wCopy) {
|
||
*destPtr++ = srcPtr[0];
|
||
*destPtr++ = srcPtr[greenOffset];
|
||
*destPtr++ = srcPtr[blueOffset];
|
||
srcPtr += blockPtr->pixelSize;
|
||
}
|
||
}
|
||
srcLinePtr += blockPtr->pitch;
|
||
destLinePtr += pitch;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Add this new block to the region which specifies which data is valid.
|
||
*/
|
||
|
||
rect.x = x;
|
||
rect.y = y;
|
||
rect.width = width;
|
||
rect.height = height;
|
||
TkUnionRectWithRegion(&rect, masterPtr->validRegion,
|
||
masterPtr->validRegion);
|
||
|
||
/*
|
||
* Update each instance.
|
||
*/
|
||
|
||
Dither(masterPtr, x, y, width, height);
|
||
|
||
/*
|
||
* Tell the core image code that this image has changed.
|
||
*/
|
||
|
||
Tk_ImageChanged(masterPtr->tkMaster, x, y, width, height, masterPtr->width,
|
||
masterPtr->height);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoPutZoomedBlock --
|
||
*
|
||
* This procedure is called to put image data into a photo image,
|
||
* with possible subsampling and/or zooming of the pixels.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The image data is stored. The image may be expanded.
|
||
* The Tk image code is informed that the image has changed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_PhotoPutZoomedBlock(handle, blockPtr, x, y, width, height, zoomX, zoomY,
|
||
subsampleX, subsampleY)
|
||
Tk_PhotoHandle handle; /* Opaque handle for the photo image
|
||
* to be updated. */
|
||
register Tk_PhotoImageBlock *blockPtr;
|
||
/* Pointer to a structure describing the
|
||
* pixel data to be copied into the image. */
|
||
int x, y; /* Coordinates of the top-left pixel to
|
||
* be updated in the image. */
|
||
int width, height; /* Dimensions of the area of the image
|
||
* to be updated. */
|
||
int zoomX, zoomY; /* Zoom factors for the X and Y axes. */
|
||
int subsampleX, subsampleY; /* Subsampling factors for the X and Y axes. */
|
||
{
|
||
register PhotoMaster *masterPtr;
|
||
int xEnd, yEnd;
|
||
int greenOffset, blueOffset;
|
||
int wLeft, hLeft;
|
||
int wCopy, hCopy;
|
||
int blockWid, blockHt;
|
||
unsigned char *srcPtr, *srcLinePtr, *srcOrigPtr;
|
||
unsigned char *destPtr, *destLinePtr;
|
||
int pitch;
|
||
int xRepeat, yRepeat;
|
||
int blockXSkip, blockYSkip;
|
||
XRectangle rect;
|
||
|
||
if ((zoomX == 1) && (zoomY == 1) && (subsampleX == 1)
|
||
&& (subsampleY == 1)) {
|
||
Tk_PhotoPutBlock(handle, blockPtr, x, y, width, height);
|
||
return;
|
||
}
|
||
|
||
masterPtr = (PhotoMaster *) handle;
|
||
|
||
if ((zoomX <= 0) || (zoomY <= 0))
|
||
return;
|
||
if ((masterPtr->userWidth != 0) && ((x + width) > masterPtr->userWidth)) {
|
||
width = masterPtr->userWidth - x;
|
||
}
|
||
if ((masterPtr->userHeight != 0)
|
||
&& ((y + height) > masterPtr->userHeight)) {
|
||
height = masterPtr->userHeight - y;
|
||
}
|
||
if ((width <= 0) || (height <= 0))
|
||
return;
|
||
|
||
xEnd = x + width;
|
||
yEnd = y + height;
|
||
if ((xEnd > masterPtr->width) || (yEnd > masterPtr->height)) {
|
||
int sameSrc = (blockPtr->pixelPtr == masterPtr->pix24);
|
||
ImgPhotoSetSize(masterPtr, MAX(xEnd, masterPtr->width),
|
||
MAX(yEnd, masterPtr->height));
|
||
if (sameSrc) {
|
||
blockPtr->pixelPtr = masterPtr->pix24;
|
||
}
|
||
}
|
||
|
||
if ((y < masterPtr->ditherY) || ((y == masterPtr->ditherY)
|
||
&& (x < masterPtr->ditherX))) {
|
||
/*
|
||
* The dithering isn't correct past the start of this block.
|
||
*/
|
||
|
||
masterPtr->ditherX = x;
|
||
masterPtr->ditherY = y;
|
||
}
|
||
|
||
/*
|
||
* If this image block could have different red, green and blue
|
||
* components, mark it as a color image.
|
||
*/
|
||
|
||
greenOffset = blockPtr->offset[1] - blockPtr->offset[0];
|
||
blueOffset = blockPtr->offset[2] - blockPtr->offset[0];
|
||
if ((greenOffset != 0) || (blueOffset != 0)) {
|
||
masterPtr->flags |= COLOR_IMAGE;
|
||
}
|
||
|
||
/*
|
||
* Work out what area the pixel data in the block expands to after
|
||
* subsampling and zooming.
|
||
*/
|
||
|
||
blockXSkip = subsampleX * blockPtr->pixelSize;
|
||
blockYSkip = subsampleY * blockPtr->pitch;
|
||
if (subsampleX > 0)
|
||
blockWid = ((blockPtr->width + subsampleX - 1) / subsampleX) * zoomX;
|
||
else if (subsampleX == 0)
|
||
blockWid = width;
|
||
else
|
||
blockWid = ((blockPtr->width - subsampleX - 1) / -subsampleX) * zoomX;
|
||
if (subsampleY > 0)
|
||
blockHt = ((blockPtr->height + subsampleY - 1) / subsampleY) * zoomY;
|
||
else if (subsampleY == 0)
|
||
blockHt = height;
|
||
else
|
||
blockHt = ((blockPtr->height - subsampleY - 1) / -subsampleY) * zoomY;
|
||
|
||
/*
|
||
* Copy the data into our local 24-bit/pixel array.
|
||
*/
|
||
|
||
destLinePtr = masterPtr->pix24 + (y * masterPtr->width + x) * 3;
|
||
srcOrigPtr = blockPtr->pixelPtr + blockPtr->offset[0];
|
||
if (subsampleX < 0) {
|
||
srcOrigPtr += (blockPtr->width - 1) * blockPtr->pixelSize;
|
||
}
|
||
if (subsampleY < 0) {
|
||
srcOrigPtr += (blockPtr->height - 1) * blockPtr->pitch;
|
||
}
|
||
|
||
pitch = masterPtr->width * 3;
|
||
for (hLeft = height; hLeft > 0; ) {
|
||
hCopy = MIN(hLeft, blockHt);
|
||
hLeft -= hCopy;
|
||
yRepeat = zoomY;
|
||
srcLinePtr = srcOrigPtr;
|
||
for (; hCopy > 0; --hCopy) {
|
||
destPtr = destLinePtr;
|
||
for (wLeft = width; wLeft > 0;) {
|
||
wCopy = MIN(wLeft, blockWid);
|
||
wLeft -= wCopy;
|
||
srcPtr = srcLinePtr;
|
||
for (; wCopy > 0; wCopy -= zoomX) {
|
||
for (xRepeat = MIN(wCopy, zoomX); xRepeat > 0; xRepeat--) {
|
||
*destPtr++ = srcPtr[0];
|
||
*destPtr++ = srcPtr[greenOffset];
|
||
*destPtr++ = srcPtr[blueOffset];
|
||
}
|
||
srcPtr += blockXSkip;
|
||
}
|
||
}
|
||
destLinePtr += pitch;
|
||
yRepeat--;
|
||
if (yRepeat <= 0) {
|
||
srcLinePtr += blockYSkip;
|
||
yRepeat = zoomY;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Add this new block to the region that specifies which data is valid.
|
||
*/
|
||
|
||
rect.x = x;
|
||
rect.y = y;
|
||
rect.width = width;
|
||
rect.height = height;
|
||
TkUnionRectWithRegion(&rect, masterPtr->validRegion,
|
||
masterPtr->validRegion);
|
||
|
||
/*
|
||
* Update each instance.
|
||
*/
|
||
|
||
Dither(masterPtr, x, y, width, height);
|
||
|
||
/*
|
||
* Tell the core image code that this image has changed.
|
||
*/
|
||
|
||
Tk_ImageChanged(masterPtr->tkMaster, x, y, width, height, masterPtr->width,
|
||
masterPtr->height);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Dither --
|
||
*
|
||
* This procedure is called to update an area of each instance's
|
||
* pixmap by dithering the corresponding area of the image master.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The pixmap of each instance of this image gets updated.
|
||
* The fields in *masterPtr indicating which area of the image
|
||
* is correctly dithered get updated.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
Dither(masterPtr, x, y, width, height)
|
||
PhotoMaster *masterPtr; /* Image master whose instances are
|
||
* to be updated. */
|
||
int x, y; /* Coordinates of the top-left pixel
|
||
* in the area to be dithered. */
|
||
int width, height; /* Dimensions of the area to be dithered. */
|
||
{
|
||
PhotoInstance *instancePtr;
|
||
|
||
if ((width <= 0) || (height <= 0)) {
|
||
return;
|
||
}
|
||
|
||
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
||
instancePtr = instancePtr->nextPtr) {
|
||
DitherInstance(instancePtr, x, y, width, height);
|
||
}
|
||
|
||
/*
|
||
* Work out whether this block will be correctly dithered
|
||
* and whether it will extend the correctly dithered region.
|
||
*/
|
||
|
||
if (((y < masterPtr->ditherY)
|
||
|| ((y == masterPtr->ditherY) && (x <= masterPtr->ditherX)))
|
||
&& ((y + height) > (masterPtr->ditherY))) {
|
||
|
||
/*
|
||
* This block starts inside (or immediately after) the correctly
|
||
* dithered region, so the first scan line at least will be right.
|
||
* Furthermore this block extends into scanline masterPtr->ditherY.
|
||
*/
|
||
|
||
if ((x == 0) && (width == masterPtr->width)) {
|
||
/*
|
||
* We are doing the full width, therefore the dithering
|
||
* will be correct to the end.
|
||
*/
|
||
|
||
masterPtr->ditherX = 0;
|
||
masterPtr->ditherY = y + height;
|
||
} else {
|
||
/*
|
||
* We are doing partial scanlines, therefore the
|
||
* correctly-dithered region will be extended by
|
||
* at most one scan line.
|
||
*/
|
||
|
||
if (x <= masterPtr->ditherX) {
|
||
masterPtr->ditherX = x + width;
|
||
if (masterPtr->ditherX >= masterPtr->width) {
|
||
masterPtr->ditherX = 0;
|
||
masterPtr->ditherY++;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* DitherInstance --
|
||
*
|
||
* This procedure is called to update an area of an instance's
|
||
* pixmap by dithering the corresponding area of the master.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The instance's pixmap gets updated.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DitherInstance(instancePtr, xStart, yStart, width, height)
|
||
PhotoInstance *instancePtr; /* The instance to be updated. */
|
||
int xStart, yStart; /* Coordinates of the top-left pixel in the
|
||
* block to be dithered. */
|
||
int width, height; /* Dimensions of the block to be dithered. */
|
||
{
|
||
PhotoMaster *masterPtr;
|
||
ColorTable *colorPtr;
|
||
XImage *imagePtr;
|
||
int nLines, bigEndian;
|
||
int i, c, x, y;
|
||
int xEnd, yEnd;
|
||
int bitsPerPixel, bytesPerLine, lineLength;
|
||
unsigned char *srcLinePtr, *srcPtr;
|
||
schar *errLinePtr, *errPtr;
|
||
unsigned char *destBytePtr, *dstLinePtr;
|
||
pixel *destLongPtr;
|
||
pixel firstBit, word, mask;
|
||
int col[3];
|
||
int doDithering = 1;
|
||
|
||
colorPtr = instancePtr->colorTablePtr;
|
||
masterPtr = instancePtr->masterPtr;
|
||
|
||
/*
|
||
* Turn dithering off in certain cases where it is not
|
||
* needed (TrueColor, DirectColor with many colors).
|
||
*/
|
||
|
||
if ((colorPtr->visualInfo.class == DirectColor)
|
||
|| (colorPtr->visualInfo.class == TrueColor)) {
|
||
int nRed, nGreen, nBlue, result;
|
||
|
||
result = sscanf(colorPtr->id.palette, "%d/%d/%d", &nRed,
|
||
&nGreen, &nBlue);
|
||
if ((nRed >= 256)
|
||
&& ((result == 1) || ((nGreen >= 256) && (nBlue >= 256)))) {
|
||
doDithering = 0;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* First work out how many lines to do at a time,
|
||
* then how many bytes we'll need for pixel storage,
|
||
* and allocate it.
|
||
*/
|
||
|
||
nLines = (MAX_PIXELS + width - 1) / width;
|
||
if (nLines < 1) {
|
||
nLines = 1;
|
||
}
|
||
if (nLines > height ) {
|
||
nLines = height;
|
||
}
|
||
|
||
imagePtr = instancePtr->imagePtr;
|
||
if (imagePtr == NULL) {
|
||
return; /* we must be really tight on memory */
|
||
}
|
||
bitsPerPixel = imagePtr->bits_per_pixel;
|
||
bytesPerLine = ((bitsPerPixel * width + 31) >> 3) & ~3;
|
||
imagePtr->width = width;
|
||
imagePtr->height = nLines;
|
||
imagePtr->bytes_per_line = bytesPerLine;
|
||
imagePtr->data = (char *) ckalloc((unsigned) (imagePtr->bytes_per_line * nLines));
|
||
bigEndian = imagePtr->bitmap_bit_order == MSBFirst;
|
||
firstBit = bigEndian? (1 << (imagePtr->bitmap_unit - 1)): 1;
|
||
|
||
lineLength = masterPtr->width * 3;
|
||
srcLinePtr = masterPtr->pix24 + yStart * lineLength + xStart * 3;
|
||
errLinePtr = instancePtr->error + yStart * lineLength + xStart * 3;
|
||
xEnd = xStart + width;
|
||
|
||
/*
|
||
* Loop over the image, doing at most nLines lines before
|
||
* updating the screen image.
|
||
*/
|
||
|
||
for (; height > 0; height -= nLines) {
|
||
if (nLines > height) {
|
||
nLines = height;
|
||
}
|
||
dstLinePtr = (unsigned char *) imagePtr->data;
|
||
yEnd = yStart + nLines;
|
||
for (y = yStart; y < yEnd; ++y) {
|
||
srcPtr = srcLinePtr;
|
||
errPtr = errLinePtr;
|
||
destBytePtr = dstLinePtr;
|
||
destLongPtr = (pixel *) dstLinePtr;
|
||
if (colorPtr->flags & COLOR_WINDOW) {
|
||
/*
|
||
* Color window. We dither the three components
|
||
* independently, using Floyd-Steinberg dithering,
|
||
* which propagates errors from the quantization of
|
||
* pixels to the pixels below and to the right.
|
||
*/
|
||
|
||
for (x = xStart; x < xEnd; ++x) {
|
||
if (doDithering) {
|
||
for (i = 0; i < 3; ++i) {
|
||
/*
|
||
* Compute the error propagated into this pixel
|
||
* for this component.
|
||
* If e[x,y] is the array of quantization error
|
||
* values, we compute
|
||
* 7/16 * e[x-1,y] + 1/16 * e[x-1,y-1]
|
||
* + 5/16 * e[x,y-1] + 3/16 * e[x+1,y-1]
|
||
* and round it to an integer.
|
||
*
|
||
* The expression ((c + 2056) >> 4) - 128
|
||
* computes round(c / 16), and works correctly on
|
||
* machines without a sign-extending right shift.
|
||
*/
|
||
|
||
c = (x > 0) ? errPtr[-3] * 7: 0;
|
||
if (y > 0) {
|
||
if (x > 0) {
|
||
c += errPtr[-lineLength-3];
|
||
}
|
||
c += errPtr[-lineLength] * 5;
|
||
if ((x + 1) < masterPtr->width) {
|
||
c += errPtr[-lineLength+3] * 3;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Add the propagated error to the value of this
|
||
* component, quantize it, and store the
|
||
* quantization error.
|
||
*/
|
||
|
||
c = ((c + 2056) >> 4) - 128 + *srcPtr++;
|
||
if (c < 0) {
|
||
c = 0;
|
||
} else if (c > 255) {
|
||
c = 255;
|
||
}
|
||
col[i] = colorPtr->colorQuant[i][c];
|
||
*errPtr++ = c - col[i];
|
||
}
|
||
} else {
|
||
/*
|
||
* Output is virtually continuous in this case,
|
||
* so don't bother dithering.
|
||
*/
|
||
|
||
col[0] = *srcPtr++;
|
||
col[1] = *srcPtr++;
|
||
col[2] = *srcPtr++;
|
||
}
|
||
|
||
/*
|
||
* Translate the quantized component values into
|
||
* an X pixel value, and store it in the image.
|
||
*/
|
||
|
||
i = colorPtr->redValues[col[0]]
|
||
+ colorPtr->greenValues[col[1]]
|
||
+ colorPtr->blueValues[col[2]];
|
||
if (colorPtr->flags & MAP_COLORS) {
|
||
i = colorPtr->pixelMap[i];
|
||
}
|
||
switch (bitsPerPixel) {
|
||
case NBBY:
|
||
*destBytePtr++ = i;
|
||
break;
|
||
#ifndef __WIN32__
|
||
/*
|
||
* This case is not valid for Windows because the image format is different
|
||
* from the pixel format in Win32. Eventually we need to fix the image
|
||
* code in Tk to use the Windows native image ordering. This would speed
|
||
* up the image code for all of the common sizes.
|
||
*/
|
||
|
||
case NBBY * sizeof(pixel):
|
||
*destLongPtr++ = i;
|
||
break;
|
||
#endif
|
||
default:
|
||
XPutPixel(imagePtr, x - xStart, y - yStart,
|
||
(unsigned) i);
|
||
}
|
||
}
|
||
|
||
} else if (bitsPerPixel > 1) {
|
||
/*
|
||
* Multibit monochrome window. The operation here is similar
|
||
* to the color window case above, except that there is only
|
||
* one component. If the master image is in color, use the
|
||
* luminance computed as
|
||
* 0.344 * red + 0.5 * green + 0.156 * blue.
|
||
*/
|
||
|
||
for (x = xStart; x < xEnd; ++x) {
|
||
c = (x > 0) ? errPtr[-1] * 7: 0;
|
||
if (y > 0) {
|
||
if (x > 0) {
|
||
c += errPtr[-lineLength-1];
|
||
}
|
||
c += errPtr[-lineLength] * 5;
|
||
if (x + 1 < masterPtr->width) {
|
||
c += errPtr[-lineLength+1] * 3;
|
||
}
|
||
}
|
||
c = ((c + 2056) >> 4) - 128;
|
||
|
||
if ((masterPtr->flags & COLOR_IMAGE) == 0) {
|
||
c += srcPtr[0];
|
||
} else {
|
||
c += (unsigned)(srcPtr[0] * 11 + srcPtr[1] * 16
|
||
+ srcPtr[2] * 5 + 16) >> 5;
|
||
}
|
||
srcPtr += 3;
|
||
|
||
if (c < 0) {
|
||
c = 0;
|
||
} else if (c > 255) {
|
||
c = 255;
|
||
}
|
||
i = colorPtr->colorQuant[0][c];
|
||
*errPtr++ = c - i;
|
||
i = colorPtr->redValues[i];
|
||
switch (bitsPerPixel) {
|
||
case NBBY:
|
||
*destBytePtr++ = i;
|
||
break;
|
||
#ifndef __WIN32__
|
||
/*
|
||
* This case is not valid for Windows because the image format is different
|
||
* from the pixel format in Win32. Eventually we need to fix the image
|
||
* code in Tk to use the Windows native image ordering. This would speed
|
||
* up the image code for all of the common sizes.
|
||
*/
|
||
|
||
case NBBY * sizeof(pixel):
|
||
*destLongPtr++ = i;
|
||
break;
|
||
#endif
|
||
default:
|
||
XPutPixel(imagePtr, x - xStart, y - yStart,
|
||
(unsigned) i);
|
||
}
|
||
}
|
||
} else {
|
||
/*
|
||
* 1-bit monochrome window. This is similar to the
|
||
* multibit monochrome case above, except that the
|
||
* quantization is simpler (we only have black = 0
|
||
* and white = 255), and we produce an XY-Bitmap.
|
||
*/
|
||
|
||
word = 0;
|
||
mask = firstBit;
|
||
for (x = xStart; x < xEnd; ++x) {
|
||
/*
|
||
* If we have accumulated a whole word, store it
|
||
* in the image and start a new word.
|
||
*/
|
||
|
||
if (mask == 0) {
|
||
*destLongPtr++ = word;
|
||
mask = firstBit;
|
||
word = 0;
|
||
}
|
||
|
||
c = (x > 0) ? errPtr[-1] * 7: 0;
|
||
if (y > 0) {
|
||
if (x > 0) {
|
||
c += errPtr[-lineLength-1];
|
||
}
|
||
c += errPtr[-lineLength] * 5;
|
||
if (x + 1 < masterPtr->width) {
|
||
c += errPtr[-lineLength+1] * 3;
|
||
}
|
||
}
|
||
c = ((c + 2056) >> 4) - 128;
|
||
|
||
if ((masterPtr->flags & COLOR_IMAGE) == 0) {
|
||
c += srcPtr[0];
|
||
} else {
|
||
c += (unsigned)(srcPtr[0] * 11 + srcPtr[1] * 16
|
||
+ srcPtr[2] * 5 + 16) >> 5;
|
||
}
|
||
srcPtr += 3;
|
||
|
||
if (c < 0) {
|
||
c = 0;
|
||
} else if (c > 255) {
|
||
c = 255;
|
||
}
|
||
if (c >= 128) {
|
||
word |= mask;
|
||
*errPtr++ = c - 255;
|
||
} else {
|
||
*errPtr++ = c;
|
||
}
|
||
mask = bigEndian? (mask >> 1): (mask << 1);
|
||
}
|
||
*destLongPtr = word;
|
||
}
|
||
srcLinePtr += lineLength;
|
||
errLinePtr += lineLength;
|
||
dstLinePtr += bytesPerLine;
|
||
}
|
||
|
||
/*
|
||
* Update the pixmap for this instance with the block of
|
||
* pixels that we have just computed.
|
||
*/
|
||
|
||
TkPutImage(colorPtr->pixelMap, colorPtr->numColors,
|
||
instancePtr->display, instancePtr->pixels,
|
||
instancePtr->gc, imagePtr, 0, 0, xStart, yStart,
|
||
(unsigned) width, (unsigned) nLines);
|
||
yStart = yEnd;
|
||
|
||
}
|
||
|
||
ckfree(imagePtr->data);
|
||
imagePtr->data = NULL;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoBlank --
|
||
*
|
||
* This procedure is called to clear an entire photo image.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The valid region for the image is set to the null region.
|
||
* The generic image code is notified that the image has changed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_PhotoBlank(handle)
|
||
Tk_PhotoHandle handle; /* Handle for the image to be blanked. */
|
||
{
|
||
PhotoMaster *masterPtr;
|
||
PhotoInstance *instancePtr;
|
||
|
||
masterPtr = (PhotoMaster *) handle;
|
||
masterPtr->ditherX = masterPtr->ditherY = 0;
|
||
masterPtr->flags = 0;
|
||
|
||
/*
|
||
* The image has valid data nowhere.
|
||
*/
|
||
|
||
if (masterPtr->validRegion != NULL) {
|
||
TkDestroyRegion(masterPtr->validRegion);
|
||
}
|
||
masterPtr->validRegion = TkCreateRegion();
|
||
|
||
/*
|
||
* Clear out the 24-bit pixel storage array.
|
||
* Clear out the dithering error arrays for each instance.
|
||
*/
|
||
|
||
memset((VOID *) masterPtr->pix24, 0,
|
||
(size_t) (masterPtr->width * masterPtr->height * 3));
|
||
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
|
||
instancePtr = instancePtr->nextPtr) {
|
||
if (instancePtr->error) {
|
||
memset((VOID *) instancePtr->error, 0,
|
||
(size_t) (masterPtr->width * masterPtr->height
|
||
* 3 * sizeof(schar)));
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Tell the core image code that this image has changed.
|
||
*/
|
||
|
||
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, masterPtr->width,
|
||
masterPtr->height, masterPtr->width, masterPtr->height);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoExpand --
|
||
*
|
||
* This procedure is called to request that a photo image be
|
||
* expanded if necessary to be at least `width' pixels wide and
|
||
* `height' pixels high. If the user has declared a definite
|
||
* image size (using the -width and -height configuration
|
||
* options) then this call has no effect.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The size of the photo image may change; if so the generic
|
||
* image code is informed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_PhotoExpand(handle, width, height)
|
||
Tk_PhotoHandle handle; /* Handle for the image to be expanded. */
|
||
int width, height; /* Desired minimum dimensions of the image. */
|
||
{
|
||
PhotoMaster *masterPtr;
|
||
|
||
masterPtr = (PhotoMaster *) handle;
|
||
|
||
if (width <= masterPtr->width) {
|
||
width = masterPtr->width;
|
||
}
|
||
if (height <= masterPtr->height) {
|
||
height = masterPtr->height;
|
||
}
|
||
if ((width != masterPtr->width) || (height != masterPtr->height)) {
|
||
ImgPhotoSetSize(masterPtr, MAX(width, masterPtr->width),
|
||
MAX(height, masterPtr->height));
|
||
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, 0, 0, masterPtr->width,
|
||
masterPtr->height);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoGetSize --
|
||
*
|
||
* This procedure is called to obtain the current size of a photo
|
||
* image.
|
||
*
|
||
* Results:
|
||
* The image's width and height are returned in *widthp
|
||
* and *heightp.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_PhotoGetSize(handle, widthPtr, heightPtr)
|
||
Tk_PhotoHandle handle; /* Handle for the image whose dimensions
|
||
* are requested. */
|
||
int *widthPtr, *heightPtr; /* The dimensions of the image are returned
|
||
* here. */
|
||
{
|
||
PhotoMaster *masterPtr;
|
||
|
||
masterPtr = (PhotoMaster *) handle;
|
||
*widthPtr = masterPtr->width;
|
||
*heightPtr = masterPtr->height;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoSetSize --
|
||
*
|
||
* This procedure is called to set size of a photo image.
|
||
* This call is equivalent to using the -width and -height
|
||
* configuration options.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The size of the image may change; if so the generic
|
||
* image code is informed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tk_PhotoSetSize(handle, width, height)
|
||
Tk_PhotoHandle handle; /* Handle for the image whose size is to
|
||
* be set. */
|
||
int width, height; /* New dimensions for the image. */
|
||
{
|
||
PhotoMaster *masterPtr;
|
||
|
||
masterPtr = (PhotoMaster *) handle;
|
||
|
||
masterPtr->userWidth = width;
|
||
masterPtr->userHeight = height;
|
||
ImgPhotoSetSize(masterPtr, ((width > 0) ? width: masterPtr->width),
|
||
((height > 0) ? height: masterPtr->height));
|
||
Tk_ImageChanged(masterPtr->tkMaster, 0, 0, 0, 0,
|
||
masterPtr->width, masterPtr->height);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tk_PhotoGetImage --
|
||
*
|
||
* This procedure is called to obtain image data from a photo
|
||
* image. This procedure fills in the Tk_PhotoImageBlock structure
|
||
* pointed to by `blockPtr' with details of the address and
|
||
* layout of the image data in memory.
|
||
*
|
||
* Results:
|
||
* TRUE (1) indicating that image data is available,
|
||
* for backwards compatibility with the old photo widget.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tk_PhotoGetImage(handle, blockPtr)
|
||
Tk_PhotoHandle handle; /* Handle for the photo image from which
|
||
* image data is desired. */
|
||
Tk_PhotoImageBlock *blockPtr;
|
||
/* Information about the address and layout
|
||
* of the image data is returned here. */
|
||
{
|
||
PhotoMaster *masterPtr;
|
||
|
||
masterPtr = (PhotoMaster *) handle;
|
||
blockPtr->pixelPtr = masterPtr->pix24;
|
||
blockPtr->width = masterPtr->width;
|
||
blockPtr->height = masterPtr->height;
|
||
blockPtr->pitch = masterPtr->width * 3;
|
||
blockPtr->pixelSize = 3;
|
||
blockPtr->offset[0] = 0;
|
||
blockPtr->offset[1] = 1;
|
||
blockPtr->offset[2] = 2;
|
||
return 1;
|
||
}
|