616 lines
16 KiB
C
616 lines
16 KiB
C
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/*
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* tkWinColor.c --
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*
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* Functions to map color names to system color values.
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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: @(#) tkWinColor.c 1.20 97/10/27 16:39:23
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*/
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#include <tkColor.h>
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#include <tkWinInt.h>
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/*
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* The following structure is used to keep track of each color that is
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* allocated by this module.
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*/
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typedef struct WinColor {
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TkColor info; /* Generic color information. */
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int index; /* Index for GetSysColor(), -1 if color
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* is not a "live" system color. */
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} WinColor;
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/*
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* colorTable is a hash table used to look up X colors by name.
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*/
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static Tcl_HashTable colorTable;
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/*
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* The sysColors array contains the names and index values for the
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* Windows indirect system color names. In use, all of the names
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* will have the string "System" prepended, but we omit it in the table
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* to save space.
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*/
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typedef struct {
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char *name;
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int index;
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} SystemColorEntry;
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static SystemColorEntry sysColors[] = {
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"3dDarkShadow", COLOR_3DDKSHADOW,
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"3dLight", COLOR_3DLIGHT,
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"ActiveBorder", COLOR_ACTIVEBORDER,
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"ActiveCaption", COLOR_ACTIVECAPTION,
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"AppWorkspace", COLOR_APPWORKSPACE,
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"Background", COLOR_BACKGROUND,
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"ButtonFace", COLOR_BTNFACE,
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"ButtonHighlight", COLOR_BTNHIGHLIGHT,
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"ButtonShadow", COLOR_BTNSHADOW,
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"ButtonText", COLOR_BTNTEXT,
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"CaptionText", COLOR_CAPTIONTEXT,
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"DisabledText", COLOR_GRAYTEXT,
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"GrayText", COLOR_GRAYTEXT,
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"Highlight", COLOR_HIGHLIGHT,
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"HighlightText", COLOR_HIGHLIGHTTEXT,
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"InactiveBorder", COLOR_INACTIVEBORDER,
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"InactiveCaption", COLOR_INACTIVECAPTION,
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"InactiveCaptionText", COLOR_INACTIVECAPTIONTEXT,
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"InfoBackground", COLOR_INFOBK,
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"InfoText", COLOR_INFOTEXT,
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"Menu", COLOR_MENU,
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"MenuText", COLOR_MENUTEXT,
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"Scrollbar", COLOR_SCROLLBAR,
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"Window", COLOR_WINDOW,
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"WindowFrame", COLOR_WINDOWFRAME,
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"WindowText", COLOR_WINDOWTEXT,
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NULL, 0
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};
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static int ncolors = 0;
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/*
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* Forward declarations for functions defined later in this file.
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*/
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static int FindSystemColor _ANSI_ARGS_((const char *name,
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XColor *colorPtr, int *indexPtr));
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static int GetColorByName _ANSI_ARGS_((char *name, XColor *color));
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static int GetColorByValue _ANSI_ARGS_((char *value, XColor *color));
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/*
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*----------------------------------------------------------------------
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*
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* FindSystemColor --
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*
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* This routine finds the color entry that corresponds to the
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* specified color.
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*
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* Results:
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* Returns non-zero on success. The RGB values of the XColor
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* will be initialized to the proper values on success.
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*
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* Side effects:
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* None.
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*
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*----------------------------------------------------------------------
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*/
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static int
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FindSystemColor(name, colorPtr, indexPtr)
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const char *name; /* Color name. */
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XColor *colorPtr; /* Where to store results. */
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int *indexPtr; /* Out parameter to store color index. */
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{
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int l, u, r, i;
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/*
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* Count the number of elements in the color array if we haven't
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* done so yet.
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*/
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if (ncolors == 0) {
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SystemColorEntry *ePtr;
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int version;
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version = LOBYTE(LOWORD(GetVersion()));
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for (ePtr = sysColors; ePtr->name != NULL; ePtr++) {
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if (version < 4) {
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if (ePtr->index == COLOR_3DDKSHADOW) {
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ePtr->index = COLOR_BTNSHADOW;
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} else if (ePtr->index == COLOR_3DLIGHT) {
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ePtr->index = COLOR_BTNHIGHLIGHT;
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}
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}
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ncolors++;
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}
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}
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/*
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* Perform a binary search on the sorted array of colors.
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*/
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l = 0;
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u = ncolors - 1;
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while (l <= u) {
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i = (l + u) / 2;
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r = strcasecmp(name, sysColors[i].name);
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if (r == 0) {
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break;
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} else if (r < 0) {
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u = i-1;
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} else {
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l = i+1;
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}
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}
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if (l > u) {
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return 0;
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}
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*indexPtr = sysColors[i].index;
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colorPtr->pixel = GetSysColor(sysColors[i].index);
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colorPtr->red = GetRValue(colorPtr->pixel) << 8;
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colorPtr->green = GetGValue(colorPtr->pixel) << 8;
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colorPtr->blue = GetBValue(colorPtr->pixel) << 8;
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colorPtr->flags = DoRed|DoGreen|DoBlue;
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colorPtr->pad = 0;
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return 1;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkpGetColor --
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*
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* Allocate a new TkColor for the color with the given name.
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*
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* Results:
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* Returns a newly allocated TkColor, or NULL on failure.
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*
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* Side effects:
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* May invalidate the colormap cache associated with tkwin upon
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* allocating a new colormap entry. Allocates a new TkColor
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* structure.
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*
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*----------------------------------------------------------------------
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*/
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TkColor *
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TkpGetColor(tkwin, name)
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Tk_Window tkwin; /* Window in which color will be used. */
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Tk_Uid name; /* Name of color to allocated (in form
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* suitable for passing to XParseColor). */
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{
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WinColor *winColPtr;
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XColor color;
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int index = -1; /* -1 indicates that this is not an indirect
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* sytem color. */
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/*
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* Check to see if it is a system color or an X color string. If the
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* color is found, allocate a new WinColor and store the XColor and the
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* system color index.
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*/
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if (((strncasecmp(name, "system", 6) == 0)
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&& FindSystemColor(name+6, &color, &index))
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|| XParseColor(Tk_Display(tkwin), Tk_Colormap(tkwin), name,
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&color)) {
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winColPtr = (WinColor *) ckalloc(sizeof(WinColor));
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winColPtr->info.color = color;
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winColPtr->index = index;
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XAllocColor(Tk_Display(tkwin), Tk_Colormap(tkwin),
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&winColPtr->info.color);
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return (TkColor *) winColPtr;
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}
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return (TkColor *) NULL;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkpGetColorByValue --
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*
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* Given a desired set of red-green-blue intensities for a color,
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* locate a pixel value to use to draw that color in a given
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* window.
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*
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* Results:
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* The return value is a pointer to an TkColor structure that
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* indicates the closest red, blue, and green intensities available
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* to those specified in colorPtr, and also specifies a pixel
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* value to use to draw in that color.
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*
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* Side effects:
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* May invalidate the colormap cache for the specified window.
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* Allocates a new TkColor structure.
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*
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*----------------------------------------------------------------------
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*/
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TkColor *
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TkpGetColorByValue(tkwin, colorPtr)
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Tk_Window tkwin; /* Window in which color will be used. */
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XColor *colorPtr; /* Red, green, and blue fields indicate
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* desired color. */
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{
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WinColor *tkColPtr = (WinColor *) ckalloc(sizeof(WinColor));
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tkColPtr->info.color.red = colorPtr->red;
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tkColPtr->info.color.green = colorPtr->green;
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tkColPtr->info.color.blue = colorPtr->blue;
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tkColPtr->info.color.pixel = 0;
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tkColPtr->index = -1;
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XAllocColor(Tk_Display(tkwin), Tk_Colormap(tkwin), &tkColPtr->info.color);
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return (TkColor *) tkColPtr;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkpFreeColor --
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*
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* Release the specified color back to the system.
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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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* Invalidates the colormap cache for the colormap associated with
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* the given color.
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*
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*----------------------------------------------------------------------
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*/
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void
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TkpFreeColor(tkColPtr)
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TkColor *tkColPtr; /* Color to be released. Must have been
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* allocated by TkpGetColor or
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* TkpGetColorByValue. */
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{
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Screen *screen = tkColPtr->screen;
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XFreeColors(DisplayOfScreen(screen), tkColPtr->colormap,
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&tkColPtr->color.pixel, 1, 0L);
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkWinIndexOfColor --
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*
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* Given a color, return the system color index that was used
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* to create the color.
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*
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* Results:
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* If the color was allocated using a system indirect color name,
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* then the corresponding GetSysColor() index is returned.
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* Otherwise, -1 is returned.
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*
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* Side effects:
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* None.
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*
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*----------------------------------------------------------------------
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*/
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int
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TkWinIndexOfColor(colorPtr)
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XColor *colorPtr;
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{
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register WinColor *winColPtr = (WinColor *) colorPtr;
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if (winColPtr->info.magic == COLOR_MAGIC) {
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return winColPtr->index;
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}
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return -1;
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}
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/*
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*----------------------------------------------------------------------
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*
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* XAllocColor --
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*
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* Find the closest available color to the specified XColor.
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*
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* Results:
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* Updates the color argument and returns 1 on success. Otherwise
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* returns 0.
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*
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* Side effects:
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* Allocates a new color in the palette.
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*
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*----------------------------------------------------------------------
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*/
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int
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XAllocColor(display, colormap, color)
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Display* display;
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Colormap colormap;
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XColor* color;
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{
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TkWinColormap *cmap = (TkWinColormap *) colormap;
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PALETTEENTRY entry, closeEntry;
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HDC dc = GetDC(NULL);
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entry.peRed = (color->red) >> 8;
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entry.peGreen = (color->green) >> 8;
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entry.peBlue = (color->blue) >> 8;
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entry.peFlags = 0;
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if (GetDeviceCaps(dc, RASTERCAPS) & RC_PALETTE) {
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unsigned long sizePalette = GetDeviceCaps(dc, SIZEPALETTE);
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UINT newPixel, closePixel;
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int new, refCount;
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Tcl_HashEntry *entryPtr;
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UINT index;
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/*
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* Find the nearest existing palette entry.
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*/
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newPixel = RGB(entry.peRed, entry.peGreen, entry.peBlue);
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index = GetNearestPaletteIndex(cmap->palette, newPixel);
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GetPaletteEntries(cmap->palette, index, 1, &closeEntry);
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closePixel = RGB(closeEntry.peRed, closeEntry.peGreen,
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closeEntry.peBlue);
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/*
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* If this is not a duplicate, allocate a new entry. Note that
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* we may get values for index that are above the current size
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* of the palette. This happens because we don't shrink the size of
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* the palette object when we deallocate colors so there may be
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* stale values that match in the upper slots. We should ignore
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* those values and just put the new color in as if the colors
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* had not matched.
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*/
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if ((index >= cmap->size) || (newPixel != closePixel)) {
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|
|
if (cmap->size == sizePalette) {
|
|||
|
|
color->red = closeEntry.peRed << 8;
|
|||
|
|
color->green = closeEntry.peGreen << 8;
|
|||
|
|
color->blue = closeEntry.peBlue << 8;
|
|||
|
|
entry = closeEntry;
|
|||
|
|
if (index >= cmap->size) {
|
|||
|
|
OutputDebugString("XAllocColor: Colormap is bigger than we thought");
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
cmap->size++;
|
|||
|
|
ResizePalette(cmap->palette, cmap->size);
|
|||
|
|
SetPaletteEntries(cmap->palette, cmap->size - 1, 1, &entry);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
color->pixel = PALETTERGB(entry.peRed, entry.peGreen, entry.peBlue);
|
|||
|
|
entryPtr = Tcl_CreateHashEntry(&cmap->refCounts,
|
|||
|
|
(char *) color->pixel, &new);
|
|||
|
|
if (new) {
|
|||
|
|
refCount = 1;
|
|||
|
|
} else {
|
|||
|
|
refCount = ((int) Tcl_GetHashValue(entryPtr)) + 1;
|
|||
|
|
}
|
|||
|
|
Tcl_SetHashValue(entryPtr, (ClientData)refCount);
|
|||
|
|
} else {
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* Determine what color will actually be used on non-colormap systems.
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
color->pixel = GetNearestColor(dc,
|
|||
|
|
RGB(entry.peRed, entry.peGreen, entry.peBlue));
|
|||
|
|
color->red = (GetRValue(color->pixel) << 8);
|
|||
|
|
color->green = (GetGValue(color->pixel) << 8);
|
|||
|
|
color->blue = (GetBValue(color->pixel) << 8);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
ReleaseDC(NULL, dc);
|
|||
|
|
return 1;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
*----------------------------------------------------------------------
|
|||
|
|
*
|
|||
|
|
* XFreeColors --
|
|||
|
|
*
|
|||
|
|
* Deallocate a block of colors.
|
|||
|
|
*
|
|||
|
|
* Results:
|
|||
|
|
* None.
|
|||
|
|
*
|
|||
|
|
* Side effects:
|
|||
|
|
* Removes entries for the current palette and compacts the
|
|||
|
|
* remaining set.
|
|||
|
|
*
|
|||
|
|
*----------------------------------------------------------------------
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
void
|
|||
|
|
XFreeColors(display, colormap, pixels, npixels, planes)
|
|||
|
|
Display* display;
|
|||
|
|
Colormap colormap;
|
|||
|
|
unsigned long* pixels;
|
|||
|
|
int npixels;
|
|||
|
|
unsigned long planes;
|
|||
|
|
{
|
|||
|
|
TkWinColormap *cmap = (TkWinColormap *) colormap;
|
|||
|
|
COLORREF cref;
|
|||
|
|
UINT count, index, refCount;
|
|||
|
|
int i;
|
|||
|
|
PALETTEENTRY entry, *entries;
|
|||
|
|
Tcl_HashEntry *entryPtr;
|
|||
|
|
HDC dc = GetDC(NULL);
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* We don't have to do anything for non-palette devices.
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
if (GetDeviceCaps(dc, RASTERCAPS) & RC_PALETTE) {
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* This is really slow for large values of npixels.
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
for (i = 0; i < npixels; i++) {
|
|||
|
|
entryPtr = Tcl_FindHashEntry(&cmap->refCounts,
|
|||
|
|
(char *) pixels[i]);
|
|||
|
|
if (!entryPtr) {
|
|||
|
|
panic("Tried to free a color that isn't allocated.");
|
|||
|
|
}
|
|||
|
|
refCount = (int) Tcl_GetHashValue(entryPtr) - 1;
|
|||
|
|
if (refCount == 0) {
|
|||
|
|
cref = pixels[i] & 0x00ffffff;
|
|||
|
|
index = GetNearestPaletteIndex(cmap->palette, cref);
|
|||
|
|
GetPaletteEntries(cmap->palette, index, 1, &entry);
|
|||
|
|
if (cref == RGB(entry.peRed, entry.peGreen, entry.peBlue)) {
|
|||
|
|
count = cmap->size - index;
|
|||
|
|
entries = (PALETTEENTRY *) ckalloc(sizeof(PALETTEENTRY)
|
|||
|
|
* count);
|
|||
|
|
GetPaletteEntries(cmap->palette, index+1, count, entries);
|
|||
|
|
SetPaletteEntries(cmap->palette, index, count, entries);
|
|||
|
|
ckfree((char *) entries);
|
|||
|
|
cmap->size--;
|
|||
|
|
} else {
|
|||
|
|
panic("Tried to free a color that isn't allocated.");
|
|||
|
|
}
|
|||
|
|
Tcl_DeleteHashEntry(entryPtr);
|
|||
|
|
} else {
|
|||
|
|
Tcl_SetHashValue(entryPtr, (ClientData)refCount);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
ReleaseDC(NULL, dc);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
*----------------------------------------------------------------------
|
|||
|
|
*
|
|||
|
|
* XCreateColormap --
|
|||
|
|
*
|
|||
|
|
* Allocate a new colormap.
|
|||
|
|
*
|
|||
|
|
* Results:
|
|||
|
|
* Returns a newly allocated colormap.
|
|||
|
|
*
|
|||
|
|
* Side effects:
|
|||
|
|
* Allocates an empty palette and color list.
|
|||
|
|
*
|
|||
|
|
*----------------------------------------------------------------------
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
Colormap
|
|||
|
|
XCreateColormap(display, w, visual, alloc)
|
|||
|
|
Display* display;
|
|||
|
|
Window w;
|
|||
|
|
Visual* visual;
|
|||
|
|
int alloc;
|
|||
|
|
{
|
|||
|
|
char logPalBuf[sizeof(LOGPALETTE) + 256 * sizeof(PALETTEENTRY)];
|
|||
|
|
LOGPALETTE *logPalettePtr;
|
|||
|
|
PALETTEENTRY *entryPtr;
|
|||
|
|
TkWinColormap *cmap;
|
|||
|
|
Tcl_HashEntry *hashPtr;
|
|||
|
|
int new;
|
|||
|
|
UINT i;
|
|||
|
|
HPALETTE sysPal;
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* Allocate a starting palette with all of the reserved colors.
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
logPalettePtr = (LOGPALETTE *) logPalBuf;
|
|||
|
|
logPalettePtr->palVersion = 0x300;
|
|||
|
|
sysPal = (HPALETTE) GetStockObject(DEFAULT_PALETTE);
|
|||
|
|
logPalettePtr->palNumEntries = GetPaletteEntries(sysPal, 0, 256,
|
|||
|
|
logPalettePtr->palPalEntry);
|
|||
|
|
|
|||
|
|
cmap = (TkWinColormap *) ckalloc(sizeof(TkWinColormap));
|
|||
|
|
cmap->size = logPalettePtr->palNumEntries;
|
|||
|
|
cmap->stale = 0;
|
|||
|
|
cmap->palette = CreatePalette(logPalettePtr);
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* Add hash entries for each of the static colors.
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
Tcl_InitHashTable(&cmap->refCounts, TCL_ONE_WORD_KEYS);
|
|||
|
|
for (i = 0; i < logPalettePtr->palNumEntries; i++) {
|
|||
|
|
entryPtr = logPalettePtr->palPalEntry + i;
|
|||
|
|
hashPtr = Tcl_CreateHashEntry(&cmap->refCounts, (char*) PALETTERGB(
|
|||
|
|
entryPtr->peRed, entryPtr->peGreen, entryPtr->peBlue), &new);
|
|||
|
|
Tcl_SetHashValue(hashPtr, (ClientData)1);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return (Colormap)cmap;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
*----------------------------------------------------------------------
|
|||
|
|
*
|
|||
|
|
* XFreeColormap --
|
|||
|
|
*
|
|||
|
|
* Frees the resources associated with the given colormap.
|
|||
|
|
*
|
|||
|
|
* Results:
|
|||
|
|
* None.
|
|||
|
|
*
|
|||
|
|
* Side effects:
|
|||
|
|
* Deletes the palette associated with the colormap. Note that
|
|||
|
|
* the palette must not be selected into a device context when
|
|||
|
|
* this occurs.
|
|||
|
|
*
|
|||
|
|
*----------------------------------------------------------------------
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
void
|
|||
|
|
XFreeColormap(display, colormap)
|
|||
|
|
Display* display;
|
|||
|
|
Colormap colormap;
|
|||
|
|
{
|
|||
|
|
TkWinColormap *cmap = (TkWinColormap *) colormap;
|
|||
|
|
if (!DeleteObject(cmap->palette)) {
|
|||
|
|
panic("Unable to free colormap, palette is still selected.");
|
|||
|
|
}
|
|||
|
|
Tcl_DeleteHashTable(&cmap->refCounts);
|
|||
|
|
ckfree((char *) cmap);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
*----------------------------------------------------------------------
|
|||
|
|
*
|
|||
|
|
* TkWinSelectPalette --
|
|||
|
|
*
|
|||
|
|
* This function sets up the specified device context with a
|
|||
|
|
* given palette. If the palette is stale, it realizes it in
|
|||
|
|
* the background unless the palette is the current global
|
|||
|
|
* palette.
|
|||
|
|
*
|
|||
|
|
* Results:
|
|||
|
|
* Returns the previous palette selected into the device context.
|
|||
|
|
*
|
|||
|
|
* Side effects:
|
|||
|
|
* May change the system palette.
|
|||
|
|
*
|
|||
|
|
*----------------------------------------------------------------------
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
HPALETTE
|
|||
|
|
TkWinSelectPalette(dc, colormap)
|
|||
|
|
HDC dc;
|
|||
|
|
Colormap colormap;
|
|||
|
|
{
|
|||
|
|
TkWinColormap *cmap = (TkWinColormap *) colormap;
|
|||
|
|
HPALETTE oldPalette;
|
|||
|
|
|
|||
|
|
oldPalette = SelectPalette(dc, cmap->palette,
|
|||
|
|
(cmap->palette == TkWinGetSystemPalette()) ? FALSE : TRUE);
|
|||
|
|
RealizePalette(dc);
|
|||
|
|
return oldPalette;
|
|||
|
|
}
|