tkWinColor.c
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- /*
- * tkWinColor.c --
- *
- * Functions to map color names to system color values.
- *
- * Copyright (c) 1995 Sun Microsystems, Inc.
- * Copyright (c) 1994 Software Research Associates, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * RCS: @(#) $Id: tkWinColor.c,v 1.6 2000/07/06 03:17:44 mo Exp $
- */
- #include "tkWinInt.h"
- #include "tkColor.h"
- /*
- * The following structure is used to keep track of each color that is
- * allocated by this module.
- */
- typedef struct WinColor {
- TkColor info; /* Generic color information. */
- int index; /* Index for GetSysColor(), -1 if color
- * is not a "live" system color. */
- } WinColor;
- /*
- * The sysColors array contains the names and index values for the
- * Windows indirect system color names. In use, all of the names
- * will have the string "System" prepended, but we omit it in the table
- * to save space.
- */
- typedef struct {
- char *name;
- int index;
- } SystemColorEntry;
- static SystemColorEntry sysColors[] = {
- "3dDarkShadow", COLOR_3DDKSHADOW,
- "3dLight", COLOR_3DLIGHT,
- "ActiveBorder", COLOR_ACTIVEBORDER,
- "ActiveCaption", COLOR_ACTIVECAPTION,
- "AppWorkspace", COLOR_APPWORKSPACE,
- "Background", COLOR_BACKGROUND,
- "ButtonFace", COLOR_BTNFACE,
- "ButtonHighlight", COLOR_BTNHIGHLIGHT,
- "ButtonShadow", COLOR_BTNSHADOW,
- "ButtonText", COLOR_BTNTEXT,
- "CaptionText", COLOR_CAPTIONTEXT,
- "DisabledText", COLOR_GRAYTEXT,
- "GrayText", COLOR_GRAYTEXT,
- "Highlight", COLOR_HIGHLIGHT,
- "HighlightText", COLOR_HIGHLIGHTTEXT,
- "InactiveBorder", COLOR_INACTIVEBORDER,
- "InactiveCaption", COLOR_INACTIVECAPTION,
- "InactiveCaptionText", COLOR_INACTIVECAPTIONTEXT,
- "InfoBackground", COLOR_INFOBK,
- "InfoText", COLOR_INFOTEXT,
- "Menu", COLOR_MENU,
- "MenuText", COLOR_MENUTEXT,
- "Scrollbar", COLOR_SCROLLBAR,
- "Window", COLOR_WINDOW,
- "WindowFrame", COLOR_WINDOWFRAME,
- "WindowText", COLOR_WINDOWTEXT,
- NULL, 0
- };
- typedef struct ThreadSpecificData {
- int ncolors;
- } ThreadSpecificData;
- static Tcl_ThreadDataKey dataKey;
- /*
- * Forward declarations for functions defined later in this file.
- */
- static int FindSystemColor _ANSI_ARGS_((const char *name,
- XColor *colorPtr, int *indexPtr));
- /*
- *----------------------------------------------------------------------
- *
- * FindSystemColor --
- *
- * This routine finds the color entry that corresponds to the
- * specified color.
- *
- * Results:
- * Returns non-zero on success. The RGB values of the XColor
- * will be initialized to the proper values on success.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- static int
- FindSystemColor(name, colorPtr, indexPtr)
- const char *name; /* Color name. */
- XColor *colorPtr; /* Where to store results. */
- int *indexPtr; /* Out parameter to store color index. */
- {
- int l, u, r, i;
- ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
- Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
- /*
- * Count the number of elements in the color array if we haven't
- * done so yet.
- */
- if (tsdPtr->ncolors == 0) {
- SystemColorEntry *ePtr;
- int version;
- version = LOBYTE(LOWORD(GetVersion()));
- for (ePtr = sysColors; ePtr->name != NULL; ePtr++) {
- if (version < 4) {
- if (ePtr->index == COLOR_3DDKSHADOW) {
- ePtr->index = COLOR_BTNSHADOW;
- } else if (ePtr->index == COLOR_3DLIGHT) {
- ePtr->index = COLOR_BTNHIGHLIGHT;
- }
- }
- tsdPtr->ncolors++;
- }
- }
- /*
- * Perform a binary search on the sorted array of colors.
- */
- l = 0;
- u = tsdPtr->ncolors - 1;
- while (l <= u) {
- i = (l + u) / 2;
- r = strcasecmp(name, sysColors[i].name);
- if (r == 0) {
- break;
- } else if (r < 0) {
- u = i-1;
- } else {
- l = i+1;
- }
- }
- if (l > u) {
- return 0;
- }
- *indexPtr = sysColors[i].index;
- colorPtr->pixel = GetSysColor(sysColors[i].index);
- /*
- * x257 is (value<<8 + value) to get the properly bit shifted
- * and padded value. [Bug: 4919]
- */
- colorPtr->red = GetRValue(colorPtr->pixel) * 257;
- colorPtr->green = GetGValue(colorPtr->pixel) * 257;
- colorPtr->blue = GetBValue(colorPtr->pixel) * 257;
- colorPtr->flags = DoRed|DoGreen|DoBlue;
- colorPtr->pad = 0;
- return 1;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkpGetColor --
- *
- * Allocate a new TkColor for the color with the given name.
- *
- * Results:
- * Returns a newly allocated TkColor, or NULL on failure.
- *
- * Side effects:
- * May invalidate the colormap cache associated with tkwin upon
- * allocating a new colormap entry. Allocates a new TkColor
- * structure.
- *
- *----------------------------------------------------------------------
- */
- TkColor *
- TkpGetColor(tkwin, name)
- Tk_Window tkwin; /* Window in which color will be used. */
- Tk_Uid name; /* Name of color to allocated (in form
- * suitable for passing to XParseColor). */
- {
- WinColor *winColPtr;
- XColor color;
- int index = -1; /* -1 indicates that this is not an indirect
- * sytem color. */
- /*
- * Check to see if it is a system color or an X color string. If the
- * color is found, allocate a new WinColor and store the XColor and the
- * system color index.
- */
- if (((strncasecmp(name, "system", 6) == 0)
- && FindSystemColor(name+6, &color, &index))
- || XParseColor(Tk_Display(tkwin), Tk_Colormap(tkwin), name,
- &color)) {
- winColPtr = (WinColor *) ckalloc(sizeof(WinColor));
- winColPtr->info.color = color;
- winColPtr->index = index;
- XAllocColor(Tk_Display(tkwin), Tk_Colormap(tkwin),
- &winColPtr->info.color);
- return (TkColor *) winColPtr;
- }
- return (TkColor *) NULL;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkpGetColorByValue --
- *
- * Given a desired set of red-green-blue intensities for a color,
- * locate a pixel value to use to draw that color in a given
- * window.
- *
- * Results:
- * The return value is a pointer to an TkColor structure that
- * indicates the closest red, blue, and green intensities available
- * to those specified in colorPtr, and also specifies a pixel
- * value to use to draw in that color.
- *
- * Side effects:
- * May invalidate the colormap cache for the specified window.
- * Allocates a new TkColor structure.
- *
- *----------------------------------------------------------------------
- */
- TkColor *
- TkpGetColorByValue(tkwin, colorPtr)
- Tk_Window tkwin; /* Window in which color will be used. */
- XColor *colorPtr; /* Red, green, and blue fields indicate
- * desired color. */
- {
- WinColor *tkColPtr = (WinColor *) ckalloc(sizeof(WinColor));
- tkColPtr->info.color.red = colorPtr->red;
- tkColPtr->info.color.green = colorPtr->green;
- tkColPtr->info.color.blue = colorPtr->blue;
- tkColPtr->info.color.pixel = 0;
- tkColPtr->index = -1;
- XAllocColor(Tk_Display(tkwin), Tk_Colormap(tkwin), &tkColPtr->info.color);
- return (TkColor *) tkColPtr;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkpFreeColor --
- *
- * Release the specified color back to the system.
- *
- * Results:
- * None
- *
- * Side effects:
- * Invalidates the colormap cache for the colormap associated with
- * the given color.
- *
- *----------------------------------------------------------------------
- */
- void
- TkpFreeColor(tkColPtr)
- TkColor *tkColPtr; /* Color to be released. Must have been
- * allocated by TkpGetColor or
- * TkpGetColorByValue. */
- {
- Screen *screen = tkColPtr->screen;
- XFreeColors(DisplayOfScreen(screen), tkColPtr->colormap,
- &tkColPtr->color.pixel, 1, 0L);
- }
- /*
- *----------------------------------------------------------------------
- *
- * TkWinIndexOfColor --
- *
- * Given a color, return the system color index that was used
- * to create the color.
- *
- * Results:
- * If the color was allocated using a system indirect color name,
- * then the corresponding GetSysColor() index is returned.
- * Otherwise, -1 is returned.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- int
- TkWinIndexOfColor(colorPtr)
- XColor *colorPtr;
- {
- register WinColor *winColPtr = (WinColor *) colorPtr;
- if (winColPtr->info.magic == COLOR_MAGIC) {
- return winColPtr->index;
- }
- return -1;
- }
- /*
- *----------------------------------------------------------------------
- *
- * XAllocColor --
- *
- * Find the closest available color to the specified XColor.
- *
- * Results:
- * Updates the color argument and returns 1 on success. Otherwise
- * returns 0.
- *
- * Side effects:
- * Allocates a new color in the palette.
- *
- *----------------------------------------------------------------------
- */
- int
- XAllocColor(display, colormap, color)
- Display* display;
- Colormap colormap;
- XColor* color;
- {
- TkWinColormap *cmap = (TkWinColormap *) colormap;
- PALETTEENTRY entry, closeEntry;
- HDC dc = GetDC(NULL);
- entry.peRed = (color->red) >> 8;
- entry.peGreen = (color->green) >> 8;
- entry.peBlue = (color->blue) >> 8;
- entry.peFlags = 0;
- if (GetDeviceCaps(dc, RASTERCAPS) & RC_PALETTE) {
- unsigned long sizePalette = GetDeviceCaps(dc, SIZEPALETTE);
- UINT newPixel, closePixel;
- int new, refCount;
- Tcl_HashEntry *entryPtr;
- UINT index;
- /*
- * Find the nearest existing palette entry.
- */
-
- newPixel = RGB(entry.peRed, entry.peGreen, entry.peBlue);
- index = GetNearestPaletteIndex(cmap->palette, newPixel);
- GetPaletteEntries(cmap->palette, index, 1, &closeEntry);
- closePixel = RGB(closeEntry.peRed, closeEntry.peGreen,
- closeEntry.peBlue);
- /*
- * If this is not a duplicate, allocate a new entry. Note that
- * we may get values for index that are above the current size
- * of the palette. This happens because we don't shrink the size of
- * the palette object when we deallocate colors so there may be
- * stale values that match in the upper slots. We should ignore
- * those values and just put the new color in as if the colors
- * had not matched.
- */
-
- if ((index >= cmap->size) || (newPixel != closePixel)) {
- if (cmap->size == sizePalette) {
- color->red = closeEntry.peRed * 257;
- color->green = closeEntry.peGreen * 257;
- color->blue = closeEntry.peBlue * 257;
- 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) * 257;
- color->green = GetGValue(color->pixel) * 257;
- color->blue = GetBValue(color->pixel) * 257;
- }
- 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;
- }