1259 lines
32 KiB
C
1259 lines
32 KiB
C
/*
|
||
* tkWinDraw.c --
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*
|
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* This file contains the Xlib emulation functions pertaining to
|
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* actually drawing objects on a window.
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*
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* Copyright (c) 1995 Sun Microsystems, Inc.
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* Copyright (c) 1994 Software Research Associates, Inc.
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*
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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.
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||
*
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||
* SCCS: @(#) tkWinDraw.c 1.19 96/07/23 16:57:19
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||
*/
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||
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#include "tkWinInt.h"
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|
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/*
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* These macros convert between X's bizarre angle units to radians.
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*/
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#define PI 3.14159265358979
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#define XAngleToRadians(a) ((double)(a) / 64 * PI / 180);
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||
|
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/*
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* Translation table between X gc functions and Win32 raster op modes.
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*/
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||
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static int ropModes[] = {
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R2_BLACK, /* GXclear */
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R2_MASKPEN, /* GXand */
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R2_MASKPENNOT, /* GXandReverse */
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R2_COPYPEN, /* GXcopy */
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R2_MASKNOTPEN, /* GXandInverted */
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R2_NOT, /* GXnoop */
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R2_XORPEN, /* GXxor */
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R2_MERGEPEN, /* GXor */
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R2_NOTMERGEPEN, /* GXnor */
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R2_NOTXORPEN, /* GXequiv */
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R2_NOT, /* GXinvert */
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R2_MERGEPENNOT, /* GXorReverse */
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R2_NOTCOPYPEN, /* GXcopyInverted */
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R2_MERGENOTPEN, /* GXorInverted */
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R2_NOTMASKPEN, /* GXnand */
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R2_WHITE /* GXset */
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};
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/*
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* Translation table between X gc functions and Win32 BitBlt op modes. Some
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* of the operations defined in X don't have names, so we have to construct
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* new opcodes for those functions. This is arcane and probably not all that
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* useful, but at least it's accurate.
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*/
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#define NOTSRCAND (DWORD)0x00220326 /* dest = (NOT source) AND dest */
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#define NOTSRCINVERT (DWORD)0x00990066 /* dest = (NOT source) XOR dest */
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#define SRCORREVERSE (DWORD)0x00DD0228 /* dest = source OR (NOT dest) */
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#define SRCNAND (DWORD)0x007700E6 /* dest = NOT (source AND dest) */
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static int bltModes[] = {
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BLACKNESS, /* GXclear */
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SRCAND, /* GXand */
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SRCERASE, /* GXandReverse */
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SRCCOPY, /* GXcopy */
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NOTSRCAND, /* GXandInverted */
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PATCOPY, /* GXnoop */
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SRCINVERT, /* GXxor */
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SRCPAINT, /* GXor */
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NOTSRCERASE, /* GXnor */
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NOTSRCINVERT, /* GXequiv */
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DSTINVERT, /* GXinvert */
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SRCORREVERSE, /* GXorReverse */
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NOTSRCCOPY, /* GXcopyInverted */
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MERGEPAINT, /* GXorInverted */
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SRCNAND, /* GXnand */
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WHITENESS /* GXset */
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};
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/*
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* The following raster op uses the source bitmap as a mask for the
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* pattern. This is used to draw in a foreground color but leave the
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* background color transparent.
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*/
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#define MASKPAT 0x00E20746 /* dest = (src & pat) | (!src & dst) */
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/*
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* The following two raster ops are used to copy the foreground and background
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* bits of a source pattern as defined by a stipple used as the pattern.
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*/
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#define COPYFG 0x00CA0749 /* dest = (pat & src) | (!pat & dst) */
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#define COPYBG 0x00AC0744 /* dest = (!pat & src) | (pat & dst) */
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/*
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* Macros used later in the file.
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*/
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#define MIN(a,b) ((a>b) ? b : a)
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#define MAX(a,b) ((a<b) ? b : a)
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/*
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* The followng typedef is used to pass Windows GDI drawing functions.
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*/
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typedef BOOL (CALLBACK *WinDrawFunc) _ANSI_ARGS_((HDC dc,
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CONST POINT* points, int npoints));
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/*
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* Forward declarations for procedures defined in this file:
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*/
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static POINT * ConvertPoints _ANSI_ARGS_((XPoint *points, int npoints,
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int mode, RECT *bbox));
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static void DrawOrFillArc _ANSI_ARGS_((Display *display,
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Drawable d, GC gc, int x, int y,
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unsigned int width, unsigned int height,
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int angle1, int angle2, int fill));
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static void RenderObject _ANSI_ARGS_((HDC dc, GC gc,
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XPoint* points, int npoints, int mode, HPEN pen,
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WinDrawFunc func));
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/*
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*----------------------------------------------------------------------
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*
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* TkWinGetDrawableDC --
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*
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* Retrieve the DC from a drawable.
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*
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* Results:
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* Returns the window DC for windows. Returns a new memory DC
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* for pixmaps.
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*
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* Side effects:
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* Sets up the palette for the device context, and saves the old
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* device context state in the passed in TkWinDCState structure.
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*
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*----------------------------------------------------------------------
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*/
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HDC
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TkWinGetDrawableDC(display, d, state)
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Display *display;
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Drawable d;
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TkWinDCState* state;
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{
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HDC dc;
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TkWinDrawable *twdPtr = (TkWinDrawable *)d;
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Colormap cmap;
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if (twdPtr->type != TWD_BITMAP) {
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TkWindow *winPtr = twdPtr->window.winPtr;
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dc = GetDC(twdPtr->window.handle);
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if (winPtr == NULL) {
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cmap = DefaultColormap(display, DefaultScreen(display));
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} else {
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cmap = winPtr->atts.colormap;
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}
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} else {
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HDC dcMem;
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dc = GetDC(NULL);
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dcMem = CreateCompatibleDC(dc);
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ReleaseDC(NULL, dc);
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SelectObject(dcMem, twdPtr->bitmap.handle);
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dc = dcMem;
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cmap = twdPtr->bitmap.colormap;
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}
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state->palette = TkWinSelectPalette(dc, cmap);
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return dc;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkWinReleaseDrawableDC --
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*
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* Frees the resources associated with a drawable's DC.
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*
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* Results:
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* None.
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*
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* Side effects:
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* Restores the old bitmap handle to the memory DC for pixmaps.
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*
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*----------------------------------------------------------------------
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*/
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void
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TkWinReleaseDrawableDC(d, dc, state)
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Drawable d;
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HDC dc;
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TkWinDCState *state;
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{
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TkWinDrawable *twdPtr = (TkWinDrawable *)d;
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SelectPalette(dc, state->palette, TRUE);
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RealizePalette(dc);
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if (twdPtr->type != TWD_BITMAP) {
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ReleaseDC(TkWinGetHWND(d), dc);
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} else {
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DeleteDC(dc);
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}
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}
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/*
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*----------------------------------------------------------------------
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*
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* ConvertPoints --
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*
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* Convert an array of X points to an array of Win32 points.
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*
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* Results:
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* Returns the converted array of POINTs.
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*
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* Side effects:
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* Allocates a block of memory that should not be freed.
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*
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*----------------------------------------------------------------------
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*/
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static POINT *
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ConvertPoints(points, npoints, mode, bbox)
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XPoint *points;
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int npoints;
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int mode; /* CoordModeOrigin or CoordModePrevious. */
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RECT *bbox; /* Bounding box of points. */
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{
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static POINT *winPoints = NULL; /* Array of points that is reused. */
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static int nWinPoints = -1; /* Current size of point array. */
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int i;
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/*
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* To avoid paying the cost of a malloc on every drawing routine,
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* we reuse the last array if it is large enough.
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*/
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if (npoints > nWinPoints) {
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if (winPoints != NULL) {
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ckfree((char *) winPoints);
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}
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winPoints = (POINT *) ckalloc(sizeof(POINT) * npoints);
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if (winPoints == NULL) {
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nWinPoints = -1;
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return NULL;
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}
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nWinPoints = npoints;
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}
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bbox->left = bbox->right = points[0].x;
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bbox->top = bbox->bottom = points[0].y;
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if (mode == CoordModeOrigin) {
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for (i = 0; i < npoints; i++) {
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winPoints[i].x = points[i].x;
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winPoints[i].y = points[i].y;
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bbox->left = MIN(bbox->left, winPoints[i].x);
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bbox->right = MAX(bbox->right, winPoints[i].x);
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bbox->top = MIN(bbox->top, winPoints[i].y);
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bbox->bottom = MAX(bbox->bottom, winPoints[i].y);
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}
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} else {
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winPoints[0].x = points[0].x;
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winPoints[0].y = points[0].y;
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for (i = 1; i < npoints; i++) {
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winPoints[i].x = winPoints[i-1].x + points[i].x;
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winPoints[i].y = winPoints[i-1].y + points[i].y;
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bbox->left = MIN(bbox->left, winPoints[i].x);
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bbox->right = MAX(bbox->right, winPoints[i].x);
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bbox->top = MIN(bbox->top, winPoints[i].y);
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bbox->bottom = MAX(bbox->bottom, winPoints[i].y);
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}
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}
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return winPoints;
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}
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/*
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*----------------------------------------------------------------------
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*
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* XCopyArea --
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*
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* Copies data from one drawable to another using block transfer
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* routines.
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*
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* Results:
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* None.
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*
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* Side effects:
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* Data is moved from a window or bitmap to a second window or
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* bitmap.
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*
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*----------------------------------------------------------------------
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*/
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void
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XCopyArea(display, src, dest, gc, src_x, src_y, width, height, dest_x, dest_y)
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Display* display;
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Drawable src;
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Drawable dest;
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GC gc;
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int src_x, src_y;
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unsigned int width, height;
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int dest_x, dest_y;
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{
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HDC srcDC, destDC;
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TkWinDCState srcState, destState;
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srcDC = TkWinGetDrawableDC(display, src, &srcState);
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if (src != dest) {
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destDC = TkWinGetDrawableDC(display, dest, &destState);
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} else {
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destDC = srcDC;
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}
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BitBlt(destDC, dest_x, dest_y, width, height, srcDC, src_x, src_y,
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bltModes[gc->function]);
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if (src != dest) {
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TkWinReleaseDrawableDC(dest, destDC, &destState);
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}
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TkWinReleaseDrawableDC(src, srcDC, &srcState);
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}
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/*
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||
*----------------------------------------------------------------------
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*
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* XCopyPlane --
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*
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* Copies a bitmap from a source drawable to a destination
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* drawable. The plane argument specifies which bit plane of
|
||
* the source contains the bitmap. Note that this implementation
|
||
* ignores the gc->function.
|
||
*
|
||
* Results:
|
||
* None.
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||
*
|
||
* Side effects:
|
||
* Changes the destination drawable.
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*
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*----------------------------------------------------------------------
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||
*/
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void
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XCopyPlane(display, src, dest, gc, src_x, src_y, width, height, dest_x,
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dest_y, plane)
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Display* display;
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Drawable src;
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||
Drawable dest;
|
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GC gc;
|
||
int src_x, src_y;
|
||
unsigned int width, height;
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||
int dest_x, dest_y;
|
||
unsigned long plane;
|
||
{
|
||
HDC srcDC, destDC;
|
||
TkWinDCState srcState, destState;
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||
HBRUSH bgBrush, fgBrush, oldBrush;
|
||
|
||
display->request++;
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||
|
||
if (plane != 1) {
|
||
panic("Unexpected plane specified for XCopyPlane");
|
||
}
|
||
|
||
srcDC = TkWinGetDrawableDC(display, src, &srcState);
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||
|
||
if (src != dest) {
|
||
destDC = TkWinGetDrawableDC(display, dest, &destState);
|
||
} else {
|
||
destDC = srcDC;
|
||
}
|
||
|
||
if (gc->clip_mask == src) {
|
||
|
||
/*
|
||
* Case 1: transparent bitmaps are handled by setting the
|
||
* destination to the foreground color whenever the source
|
||
* pixel is set.
|
||
*/
|
||
|
||
fgBrush = CreateSolidBrush(gc->foreground);
|
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oldBrush = SelectObject(destDC, fgBrush);
|
||
BitBlt(destDC, dest_x, dest_y, width, height, srcDC, src_x, src_y,
|
||
MASKPAT);
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||
SelectObject(destDC, oldBrush);
|
||
DeleteObject(fgBrush);
|
||
} else if (gc->clip_mask == None) {
|
||
|
||
/*
|
||
* Case 2: opaque bitmaps. Windows handles the conversion
|
||
* from one bit to multiple bits by setting 0 to the
|
||
* foreground color, and 1 to the background color (seems
|
||
* backwards, but there you are).
|
||
*/
|
||
|
||
SetBkMode(destDC, OPAQUE);
|
||
SetBkColor(destDC, gc->foreground);
|
||
SetTextColor(destDC, gc->background);
|
||
BitBlt(destDC, dest_x, dest_y, width, height, srcDC, src_x, src_y,
|
||
SRCCOPY);
|
||
} else {
|
||
|
||
/*
|
||
* Case 3: two arbitrary bitmaps. Copy the source rectangle
|
||
* into a color pixmap. Use the result as a brush when
|
||
* copying the clip mask into the destination.
|
||
*/
|
||
|
||
HDC memDC, maskDC;
|
||
HBITMAP bitmap;
|
||
TkWinDCState maskState;
|
||
|
||
fgBrush = CreateSolidBrush(gc->foreground);
|
||
bgBrush = CreateSolidBrush(gc->background);
|
||
maskDC = TkWinGetDrawableDC(display, gc->clip_mask, &maskState);
|
||
memDC = CreateCompatibleDC(destDC);
|
||
bitmap = CreateBitmap(width, height, 1, 1, NULL);
|
||
SelectObject(memDC, bitmap);
|
||
|
||
/*
|
||
* Set foreground bits. We create a new bitmap containing
|
||
* (source AND mask), then use it to set the foreground color
|
||
* into the destination.
|
||
*/
|
||
|
||
BitBlt(memDC, 0, 0, width, height, srcDC, src_x, src_y, SRCCOPY);
|
||
BitBlt(memDC, 0, 0, width, height, maskDC, dest_x - gc->clip_x_origin,
|
||
dest_y - gc->clip_y_origin, SRCAND);
|
||
oldBrush = SelectObject(destDC, fgBrush);
|
||
BitBlt(destDC, dest_x, dest_y, width, height, memDC, 0, 0, MASKPAT);
|
||
|
||
/*
|
||
* Set background bits. Same as foreground, except we use
|
||
* ((NOT source) AND mask) and the background brush.
|
||
*/
|
||
|
||
BitBlt(memDC, 0, 0, width, height, srcDC, src_x, src_y, NOTSRCCOPY);
|
||
BitBlt(memDC, 0, 0, width, height, maskDC, dest_x - gc->clip_x_origin,
|
||
dest_y - gc->clip_y_origin, SRCAND);
|
||
SelectObject(destDC, bgBrush);
|
||
BitBlt(destDC, dest_x, dest_y, width, height, memDC, 0, 0, MASKPAT);
|
||
|
||
|
||
TkWinReleaseDrawableDC(gc->clip_mask, maskDC, &maskState);
|
||
SelectObject(destDC, oldBrush);
|
||
DeleteDC(memDC);
|
||
DeleteObject(bitmap);
|
||
DeleteObject(fgBrush);
|
||
DeleteObject(bgBrush);
|
||
}
|
||
if (src != dest) {
|
||
TkWinReleaseDrawableDC(dest, destDC, &destState);
|
||
}
|
||
TkWinReleaseDrawableDC(src, srcDC, &srcState);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TkPutImage --
|
||
*
|
||
* Copies a subimage from an in-memory image to a rectangle of
|
||
* of the specified drawable.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Draws the image on the specified drawable.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
TkPutImage(colors, ncolors, display, d, gc, image, src_x, src_y, dest_x,
|
||
dest_y, width, height)
|
||
unsigned long *colors; /* Array of pixel values used by this
|
||
* image. May be NULL. */
|
||
int ncolors; /* Number of colors used, or 0. */
|
||
Display* display;
|
||
Drawable d; /* Destination drawable. */
|
||
GC gc;
|
||
XImage* image; /* Source image. */
|
||
int src_x, src_y; /* Offset of subimage. */
|
||
int dest_x, dest_y; /* Position of subimage origin in
|
||
* drawable. */
|
||
unsigned int width, height; /* Dimensions of subimage. */
|
||
{
|
||
HDC dc, dcMem;
|
||
TkWinDCState state;
|
||
BITMAPINFO *infoPtr;
|
||
HBITMAP bitmap;
|
||
char *data;
|
||
|
||
display->request++;
|
||
|
||
dc = TkWinGetDrawableDC(display, d, &state);
|
||
SetROP2(dc, ropModes[gc->function]);
|
||
dcMem = CreateCompatibleDC(dc);
|
||
|
||
if (image->bits_per_pixel == 1) {
|
||
data = TkAlignImageData(image, sizeof(WORD), MSBFirst);
|
||
bitmap = CreateBitmap(width, height, 1, 1, data);
|
||
SetTextColor(dc, gc->foreground);
|
||
SetBkColor(dc, gc->background);
|
||
ckfree(data);
|
||
} else {
|
||
int i, usePalette;
|
||
|
||
/*
|
||
* Do not use a palette for TrueColor images.
|
||
*/
|
||
|
||
usePalette = (image->bits_per_pixel < 24);
|
||
|
||
if (usePalette) {
|
||
infoPtr = (BITMAPINFO*) ckalloc(sizeof(BITMAPINFOHEADER)
|
||
+ sizeof(RGBQUAD)*ncolors);
|
||
} else {
|
||
infoPtr = (BITMAPINFO*) ckalloc(sizeof(BITMAPINFOHEADER));
|
||
}
|
||
|
||
infoPtr->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
|
||
infoPtr->bmiHeader.biWidth = image->width;
|
||
|
||
/*
|
||
* The following code works around a bug in Win32s. CreateDIBitmap
|
||
* fails under Win32s for top-down images. So we have to reverse the
|
||
* order of the scanlines. If we are not running under Win32s, we can
|
||
* just declare the image to be top-down.
|
||
*/
|
||
|
||
if ((GetVersion() & 0x80000000)) {
|
||
int y;
|
||
char *srcPtr, *dstPtr, *temp;
|
||
|
||
temp = ckalloc((unsigned) image->bytes_per_line);
|
||
srcPtr = image->data;
|
||
dstPtr = image->data+(image->bytes_per_line * (image->height - 1));
|
||
for (y = 0; y < (image->height/2); y++) {
|
||
memcpy(temp, srcPtr, image->bytes_per_line);
|
||
memcpy(srcPtr, dstPtr, image->bytes_per_line);
|
||
memcpy(dstPtr, temp, image->bytes_per_line);
|
||
srcPtr += image->bytes_per_line;
|
||
dstPtr -= image->bytes_per_line;
|
||
}
|
||
ckfree(temp);
|
||
infoPtr->bmiHeader.biHeight = image->height; /* Bottom-up order */
|
||
} else {
|
||
infoPtr->bmiHeader.biHeight = -image->height; /* Top-down order */
|
||
}
|
||
infoPtr->bmiHeader.biPlanes = 1;
|
||
infoPtr->bmiHeader.biBitCount = image->bits_per_pixel;
|
||
infoPtr->bmiHeader.biCompression = BI_RGB;
|
||
infoPtr->bmiHeader.biSizeImage = 0;
|
||
infoPtr->bmiHeader.biXPelsPerMeter = 0;
|
||
infoPtr->bmiHeader.biYPelsPerMeter = 0;
|
||
infoPtr->bmiHeader.biClrImportant = 0;
|
||
|
||
if (usePalette) {
|
||
infoPtr->bmiHeader.biClrUsed = ncolors;
|
||
for (i = 0; i < ncolors; i++) {
|
||
infoPtr->bmiColors[i].rgbBlue = GetBValue(colors[i]);
|
||
infoPtr->bmiColors[i].rgbGreen = GetGValue(colors[i]);
|
||
infoPtr->bmiColors[i].rgbRed = GetRValue(colors[i]);
|
||
infoPtr->bmiColors[i].rgbReserved = 0;
|
||
}
|
||
} else {
|
||
infoPtr->bmiHeader.biClrUsed = 0;
|
||
}
|
||
bitmap = CreateDIBitmap(dc, &infoPtr->bmiHeader, CBM_INIT,
|
||
image->data, infoPtr, DIB_RGB_COLORS);
|
||
ckfree((char*)infoPtr);
|
||
}
|
||
bitmap = SelectObject(dcMem, bitmap);
|
||
BitBlt(dc, dest_x, dest_y, width, height, dcMem, src_x, src_y, SRCCOPY);
|
||
DeleteObject(SelectObject(dcMem, bitmap));
|
||
DeleteObject(dcMem);
|
||
TkWinReleaseDrawableDC(d, dc, &state);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* XDrawString --
|
||
*
|
||
* Draw a single string in the current font.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Renders the specified string in the drawable.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
XDrawString(display, d, gc, x, y, string, length)
|
||
Display* display;
|
||
Drawable d;
|
||
GC gc;
|
||
int x;
|
||
int y;
|
||
_Xconst char* string;
|
||
int length;
|
||
{
|
||
HDC dc;
|
||
HFONT oldFont;
|
||
TkWinDCState state;
|
||
|
||
display->request++;
|
||
|
||
if (d == None) {
|
||
return;
|
||
}
|
||
|
||
dc = TkWinGetDrawableDC(display, d, &state);
|
||
SetROP2(dc, ropModes[gc->function]);
|
||
|
||
if ((gc->fill_style == FillStippled
|
||
|| gc->fill_style == FillOpaqueStippled)
|
||
&& gc->stipple != None) {
|
||
TkWinDrawable *twdPtr = (TkWinDrawable *)gc->stipple;
|
||
HBRUSH oldBrush, stipple;
|
||
HBITMAP oldBitmap, bitmap;
|
||
HDC dcMem;
|
||
TEXTMETRIC tm;
|
||
SIZE size;
|
||
|
||
if (twdPtr->type != TWD_BITMAP) {
|
||
panic("unexpected drawable type in stipple");
|
||
}
|
||
|
||
/*
|
||
* Select stipple pattern into destination dc.
|
||
*/
|
||
|
||
dcMem = CreateCompatibleDC(dc);
|
||
|
||
stipple = CreatePatternBrush(twdPtr->bitmap.handle);
|
||
SetBrushOrgEx(dc, gc->ts_x_origin, gc->ts_y_origin, NULL);
|
||
oldBrush = SelectObject(dc, stipple);
|
||
|
||
SetTextAlign(dcMem, TA_LEFT | TA_TOP);
|
||
SetTextColor(dcMem, gc->foreground);
|
||
SetBkMode(dcMem, TRANSPARENT);
|
||
SetBkColor(dcMem, RGB(0, 0, 0));
|
||
|
||
if (gc->font != None) {
|
||
oldFont = SelectObject(dcMem, (HFONT)gc->font);
|
||
}
|
||
|
||
/*
|
||
* Compute the bounding box and create a compatible bitmap.
|
||
*/
|
||
|
||
GetTextExtentPoint(dcMem, string, length, &size);
|
||
GetTextMetrics(dcMem, &tm);
|
||
size.cx -= tm.tmOverhang;
|
||
bitmap = CreateCompatibleBitmap(dc, size.cx, size.cy);
|
||
oldBitmap = SelectObject(dcMem, bitmap);
|
||
|
||
/*
|
||
* The following code is tricky because fonts are rendered in multiple
|
||
* colors. First we draw onto a black background and copy the white
|
||
* bits. Then we draw onto a white background and copy the black bits.
|
||
* Both the foreground and background bits of the font are ANDed with
|
||
* the stipple pattern as they are copied.
|
||
*/
|
||
|
||
PatBlt(dcMem, 0, 0, size.cx, size.cy, BLACKNESS);
|
||
TextOut(dcMem, 0, 0, string, length);
|
||
BitBlt(dc, x, y - tm.tmAscent, size.cx, size.cy, dcMem,
|
||
0, 0, 0xEA02E9);
|
||
PatBlt(dcMem, 0, 0, size.cx, size.cy, WHITENESS);
|
||
TextOut(dcMem, 0, 0, string, length);
|
||
BitBlt(dc, x, y - tm.tmAscent, size.cx, size.cy, dcMem,
|
||
0, 0, 0x8A0E06);
|
||
|
||
/*
|
||
* Destroy the temporary bitmap and restore the device context.
|
||
*/
|
||
|
||
if (gc->font != None) {
|
||
SelectObject(dcMem, oldFont);
|
||
}
|
||
SelectObject(dcMem, oldBitmap);
|
||
DeleteObject(bitmap);
|
||
DeleteDC(dcMem);
|
||
SelectObject(dc, oldBrush);
|
||
DeleteObject(stipple);
|
||
} else {
|
||
SetTextAlign(dc, TA_LEFT | TA_BASELINE);
|
||
SetTextColor(dc, gc->foreground);
|
||
SetBkMode(dc, TRANSPARENT);
|
||
if (gc->font != None) {
|
||
oldFont = SelectObject(dc, (HFONT)gc->font);
|
||
}
|
||
TextOut(dc, x, y, string, length);
|
||
if (gc->font != None) {
|
||
SelectObject(dc, oldFont);
|
||
}
|
||
}
|
||
TkWinReleaseDrawableDC(d, dc, &state);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* XFillRectangles --
|
||
*
|
||
* Fill multiple rectangular areas in the given drawable.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Draws onto the specified drawable.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
XFillRectangles(display, d, gc, rectangles, nrectangles)
|
||
Display* display;
|
||
Drawable d;
|
||
GC gc;
|
||
XRectangle* rectangles;
|
||
int nrectangles;
|
||
{
|
||
HDC dc;
|
||
HBRUSH brush;
|
||
int i;
|
||
RECT rect;
|
||
TkWinDCState state;
|
||
|
||
if (d == None) {
|
||
return;
|
||
}
|
||
|
||
dc = TkWinGetDrawableDC(display, d, &state);
|
||
SetROP2(dc, ropModes[gc->function]);
|
||
brush = CreateSolidBrush(gc->foreground);
|
||
|
||
if ((gc->fill_style == FillStippled
|
||
|| gc->fill_style == FillOpaqueStippled)
|
||
&& gc->stipple != None) {
|
||
TkWinDrawable *twdPtr = (TkWinDrawable *)gc->stipple;
|
||
HBRUSH oldBrush, stipple;
|
||
HBITMAP oldBitmap, bitmap;
|
||
HDC dcMem;
|
||
HBRUSH bgBrush = CreateSolidBrush(gc->background);
|
||
|
||
if (twdPtr->type != TWD_BITMAP) {
|
||
panic("unexpected drawable type in stipple");
|
||
}
|
||
|
||
/*
|
||
* Select stipple pattern into destination dc.
|
||
*/
|
||
|
||
stipple = CreatePatternBrush(twdPtr->bitmap.handle);
|
||
SetBrushOrgEx(dc, gc->ts_x_origin, gc->ts_y_origin, NULL);
|
||
oldBrush = SelectObject(dc, stipple);
|
||
dcMem = CreateCompatibleDC(dc);
|
||
|
||
/*
|
||
* For each rectangle, create a drawing surface which is the size of
|
||
* the rectangle and fill it with the background color. Then merge the
|
||
* result with the stipple pattern.
|
||
*/
|
||
|
||
for (i = 0; i < nrectangles; i++) {
|
||
bitmap = CreateCompatibleBitmap(dc, rectangles[i].width,
|
||
rectangles[i].height);
|
||
oldBitmap = SelectObject(dcMem, bitmap);
|
||
rect.left = 0;
|
||
rect.top = 0;
|
||
rect.right = rectangles[i].width;
|
||
rect.bottom = rectangles[i].height;
|
||
FillRect(dcMem, &rect, brush);
|
||
BitBlt(dc, rectangles[i].x, rectangles[i].y, rectangles[i].width,
|
||
rectangles[i].height, dcMem, 0, 0, COPYFG);
|
||
if (gc->fill_style == FillOpaqueStippled) {
|
||
FillRect(dcMem, &rect, bgBrush);
|
||
BitBlt(dc, rectangles[i].x, rectangles[i].y,
|
||
rectangles[i].width, rectangles[i].height, dcMem,
|
||
0, 0, COPYBG);
|
||
}
|
||
SelectObject(dcMem, oldBitmap);
|
||
DeleteObject(bitmap);
|
||
}
|
||
|
||
DeleteDC(dcMem);
|
||
SelectObject(dc, oldBrush);
|
||
DeleteObject(stipple);
|
||
} else {
|
||
for (i = 0; i < nrectangles; i++) {
|
||
rect.left = rectangles[i].x;
|
||
rect.top = rectangles[i].y;
|
||
rect.right = rect.left + rectangles[i].width;
|
||
rect.bottom = rect.top + rectangles[i].height;
|
||
FillRect(dc, &rect, brush);
|
||
}
|
||
}
|
||
DeleteObject(brush);
|
||
TkWinReleaseDrawableDC(d, dc, &state);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* RenderObject --
|
||
*
|
||
* This function draws a shape using a list of points, a
|
||
* stipple pattern, and the specified drawing function.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
RenderObject(dc, gc, points, npoints, mode, pen, func)
|
||
HDC dc;
|
||
GC gc;
|
||
XPoint* points;
|
||
int npoints;
|
||
int mode;
|
||
HPEN pen;
|
||
WinDrawFunc func;
|
||
{
|
||
RECT rect;
|
||
HPEN oldPen;
|
||
HBRUSH oldBrush;
|
||
POINT *winPoints = ConvertPoints(points, npoints, mode, &rect);
|
||
|
||
if ((gc->fill_style == FillStippled
|
||
|| gc->fill_style == FillOpaqueStippled)
|
||
&& gc->stipple != None) {
|
||
|
||
TkWinDrawable *twdPtr = (TkWinDrawable *)gc->stipple;
|
||
HDC dcMem;
|
||
LONG width, height;
|
||
HBITMAP oldBitmap;
|
||
int i;
|
||
HBRUSH oldMemBrush;
|
||
|
||
if (twdPtr->type != TWD_BITMAP) {
|
||
panic("unexpected drawable type in stipple");
|
||
}
|
||
|
||
|
||
width = rect.right - rect.left;
|
||
height = rect.bottom - rect.top;
|
||
|
||
/*
|
||
* Select stipple pattern into destination dc.
|
||
*/
|
||
|
||
oldBrush = SelectObject(dc, CreatePatternBrush(twdPtr->bitmap.handle));
|
||
SetBrushOrgEx(dc, gc->ts_x_origin, gc->ts_y_origin, NULL);
|
||
|
||
/*
|
||
* Create temporary drawing surface containing a copy of the
|
||
* destination equal in size to the bounding box of the object.
|
||
*/
|
||
|
||
dcMem = CreateCompatibleDC(dc);
|
||
oldBitmap = SelectObject(dcMem, CreateCompatibleBitmap(dc, width,
|
||
height));
|
||
oldPen = SelectObject(dcMem, pen);
|
||
BitBlt(dcMem, 0, 0, width, height, dc, rect.left, rect.top, SRCCOPY);
|
||
|
||
/*
|
||
* Translate the object to 0,0 for rendering in the temporary drawing
|
||
* surface.
|
||
*/
|
||
|
||
for (i = 0; i < npoints; i++) {
|
||
winPoints[i].x -= rect.left;
|
||
winPoints[i].y -= rect.top;
|
||
}
|
||
|
||
/*
|
||
* Draw the object in the foreground color and copy it to the
|
||
* destination wherever the pattern is set.
|
||
*/
|
||
|
||
SetPolyFillMode(dcMem, (gc->fill_rule == EvenOddRule) ? ALTERNATE
|
||
: WINDING);
|
||
oldMemBrush = SelectObject(dcMem, CreateSolidBrush(gc->foreground));
|
||
(*func)(dcMem, winPoints, npoints);
|
||
BitBlt(dc, rect.left, rect.top, width, height, dcMem, 0, 0, COPYFG);
|
||
|
||
/*
|
||
* If we are rendering an opaque stipple, then draw the polygon in the
|
||
* background color and copy it to the destination wherever the pattern
|
||
* is clear.
|
||
*/
|
||
|
||
if (gc->fill_style == FillOpaqueStippled) {
|
||
DeleteObject(SelectObject(dcMem,
|
||
CreateSolidBrush(gc->background)));
|
||
(*func)(dcMem, winPoints, npoints);
|
||
BitBlt(dc, rect.left, rect.top, width, height, dcMem, 0, 0,
|
||
COPYBG);
|
||
}
|
||
|
||
SelectObject(dcMem, oldPen);
|
||
DeleteObject(SelectObject(dcMem, oldMemBrush));
|
||
DeleteObject(SelectObject(dcMem, oldBitmap));
|
||
DeleteDC(dcMem);
|
||
} else {
|
||
oldPen = SelectObject(dc, pen);
|
||
oldBrush = SelectObject(dc, CreateSolidBrush(gc->foreground));
|
||
SetROP2(dc, ropModes[gc->function]);
|
||
|
||
SetPolyFillMode(dc, (gc->fill_rule == EvenOddRule) ? ALTERNATE
|
||
: WINDING);
|
||
|
||
(*func)(dc, winPoints, npoints);
|
||
|
||
SelectObject(dc, oldPen);
|
||
}
|
||
DeleteObject(SelectObject(dc, oldBrush));
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* XDrawLines --
|
||
*
|
||
* Draw connected lines.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Renders a series of connected lines.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
XDrawLines(display, d, gc, points, npoints, mode)
|
||
Display* display;
|
||
Drawable d;
|
||
GC gc;
|
||
XPoint* points;
|
||
int npoints;
|
||
int mode;
|
||
{
|
||
HPEN pen;
|
||
TkWinDCState state;
|
||
HDC dc;
|
||
|
||
if (d == None) {
|
||
return;
|
||
}
|
||
|
||
dc = TkWinGetDrawableDC(display, d, &state);
|
||
|
||
pen = CreatePen(PS_SOLID, gc->line_width, gc->foreground);
|
||
RenderObject(dc, gc, points, npoints, mode, pen, Polyline);
|
||
DeleteObject(pen);
|
||
|
||
TkWinReleaseDrawableDC(d, dc, &state);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* XFillPolygon --
|
||
*
|
||
* Draws a filled polygon.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Draws a filled polygon on the specified drawable.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
XFillPolygon(display, d, gc, points, npoints, shape, mode)
|
||
Display* display;
|
||
Drawable d;
|
||
GC gc;
|
||
XPoint* points;
|
||
int npoints;
|
||
int shape;
|
||
int mode;
|
||
{
|
||
HPEN pen;
|
||
TkWinDCState state;
|
||
HDC dc;
|
||
|
||
if (d == None) {
|
||
return;
|
||
}
|
||
|
||
dc = TkWinGetDrawableDC(display, d, &state);
|
||
|
||
pen = GetStockObject(NULL_PEN);
|
||
RenderObject(dc, gc, points, npoints, mode, pen, Polygon);
|
||
|
||
TkWinReleaseDrawableDC(d, dc, &state);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* XDrawRectangle --
|
||
*
|
||
* Draws a rectangle.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Draws a rectangle on the specified drawable.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
XDrawRectangle(display, d, gc, x, y, width, height)
|
||
Display* display;
|
||
Drawable d;
|
||
GC gc;
|
||
int x;
|
||
int y;
|
||
unsigned int width;
|
||
unsigned int height;
|
||
{
|
||
HPEN pen, oldPen;
|
||
TkWinDCState state;
|
||
HBRUSH oldBrush;
|
||
HDC dc;
|
||
|
||
if (d == None) {
|
||
return;
|
||
}
|
||
|
||
dc = TkWinGetDrawableDC(display, d, &state);
|
||
|
||
pen = CreatePen(PS_SOLID, gc->line_width, gc->foreground);
|
||
oldPen = SelectObject(dc, pen);
|
||
oldBrush = SelectObject(dc, GetStockObject(NULL_BRUSH));
|
||
SetROP2(dc, ropModes[gc->function]);
|
||
|
||
Rectangle(dc, x, y, x+width+1, y+height+1);
|
||
|
||
DeleteObject(SelectObject(dc, oldPen));
|
||
SelectObject(dc, oldBrush);
|
||
TkWinReleaseDrawableDC(d, dc, &state);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* XDrawArc --
|
||
*
|
||
* Draw an arc.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Draws an arc on the specified drawable.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
XDrawArc(display, d, gc, x, y, width, height, angle1, angle2)
|
||
Display* display;
|
||
Drawable d;
|
||
GC gc;
|
||
int x;
|
||
int y;
|
||
unsigned int width;
|
||
unsigned int height;
|
||
int angle1;
|
||
int angle2;
|
||
{
|
||
display->request++;
|
||
|
||
DrawOrFillArc(display, d, gc, x, y, width, height, angle1, angle2, 0);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* XFillArc --
|
||
*
|
||
* Draw a filled arc.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Draws a filled arc on the specified drawable.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
XFillArc(display, d, gc, x, y, width, height, angle1, angle2)
|
||
Display* display;
|
||
Drawable d;
|
||
GC gc;
|
||
int x;
|
||
int y;
|
||
unsigned int width;
|
||
unsigned int height;
|
||
int angle1;
|
||
int angle2;
|
||
{
|
||
display->request++;
|
||
|
||
DrawOrFillArc(display, d, gc, x, y, width, height, angle1, angle2, 1);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* DrawOrFillArc --
|
||
*
|
||
* This procedure handles the rendering of drawn or filled
|
||
* arcs and chords.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Renders the requested arc.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DrawOrFillArc(display, d, gc, x, y, width, height, angle1, angle2, fill)
|
||
Display *display;
|
||
Drawable d;
|
||
GC gc;
|
||
int x, y; /* left top */
|
||
unsigned int width, height;
|
||
int angle1; /* angle1: three-o'clock (deg*64) */
|
||
int angle2; /* angle2: relative (deg*64) */
|
||
int fill; /* ==0 draw, !=0 fill */
|
||
{
|
||
HDC dc;
|
||
HBRUSH brush, oldBrush;
|
||
HPEN pen, oldPen;
|
||
TkWinDCState state;
|
||
int xr, yr, xstart, ystart, xend, yend;
|
||
double radian_start, radian_end, radian_tmp;
|
||
|
||
if (d == None) {
|
||
return;
|
||
}
|
||
|
||
dc = TkWinGetDrawableDC(display, d, &state);
|
||
|
||
SetROP2(dc, ropModes[gc->function]);
|
||
|
||
/*
|
||
* Convert the X arc description to a Win32 arc description.
|
||
*/
|
||
|
||
xr = (width % 2) ? (width / 2) : ((width - 1) / 2);
|
||
yr = (height % 2) ? (height / 2) : ((height - 1) / 2);
|
||
|
||
radian_start = XAngleToRadians(angle1);
|
||
radian_end = XAngleToRadians(angle1+angle2);
|
||
if( angle2 < 0 ) {
|
||
radian_tmp = radian_start;
|
||
radian_start = radian_end;
|
||
radian_end = radian_tmp;
|
||
}
|
||
|
||
xstart = x + (int) ((double)xr * (1+cos(radian_start)));
|
||
ystart = y + (int) ((double)yr * (1-sin(radian_start)));
|
||
xend = x + (int) ((double)xr * (1+cos(radian_end)));
|
||
yend = y + (int) ((double)yr * (1-sin(radian_end)));
|
||
|
||
/*
|
||
* Now draw a filled or open figure.
|
||
*/
|
||
|
||
if (!fill) {
|
||
pen = CreatePen(PS_SOLID, gc->line_width, gc->foreground);
|
||
oldPen = SelectObject(dc, pen);
|
||
oldBrush = SelectObject(dc, GetStockObject(NULL_BRUSH));
|
||
Arc(dc, x, y, x + width, y + height, xstart, ystart, xend, yend);
|
||
DeleteObject(SelectObject(dc, oldPen));
|
||
SelectObject(dc, oldBrush);
|
||
} else {
|
||
brush = CreateSolidBrush(gc->foreground);
|
||
oldBrush = SelectObject(dc, brush);
|
||
oldPen = SelectObject(dc, GetStockObject(NULL_PEN));
|
||
if (gc->arc_mode == ArcChord) {
|
||
Chord(dc, x, y, x + width, y + height, xstart, ystart, xend, yend);
|
||
} else if ( gc->arc_mode == ArcPieSlice ) {
|
||
Pie(dc, x, y, x + width, y + height, xstart, ystart, xend, yend);
|
||
}
|
||
DeleteObject(SelectObject(dc, oldBrush));
|
||
SelectObject(dc, oldPen);
|
||
}
|
||
TkWinReleaseDrawableDC(d, dc, &state);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TkScrollWindow --
|
||
*
|
||
* Scroll a rectangle of the specified window and accumulate
|
||
* a damage region.
|
||
*
|
||
* Results:
|
||
* Returns 0 if the scroll genereated no additional damage.
|
||
* Otherwise, sets the region that needs to be repainted after
|
||
* scrolling and returns 1.
|
||
*
|
||
* Side effects:
|
||
* Scrolls the bits in the window.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
TkScrollWindow(tkwin, gc, x, y, width, height, dx, dy, damageRgn)
|
||
Tk_Window tkwin; /* The window to be scrolled. */
|
||
GC gc; /* GC for window to be scrolled. */
|
||
int x, y, width, height; /* Position rectangle to be scrolled. */
|
||
int dx, dy; /* Distance rectangle should be moved. */
|
||
TkRegion damageRgn; /* Region to accumulate damage in. */
|
||
{
|
||
HWND hwnd = TkWinGetHWND(Tk_WindowId(tkwin));
|
||
RECT scrollRect;
|
||
|
||
scrollRect.left = x;
|
||
scrollRect.top = y;
|
||
scrollRect.right = x + width;
|
||
scrollRect.bottom = y + height;
|
||
return (ScrollWindowEx(hwnd, dx, dy, &scrollRect, NULL, (HRGN) damageRgn,
|
||
NULL, 0) == NULLREGION) ? 0 : 1;
|
||
}
|