/[dtapublic]/projs/ets/trunk/src/c_tk_base_7_5_w_mods/tkwincolor.c

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-revision 69 by dashley,
Sat Nov  5 10:54:17 2016 UTC
+revision 71 by dashley,
Sat Nov  5 11:07:06 2016 UTC
 Line 1
  /* $Header$ */
  /*
   * 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 1.1.1.1 2001/06/13 05:12:03 dtashley 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));
  static int      GetColorByName _ANSI_ARGS_((char *name, XColor *color));
  static int      GetColorByValue _ANSI_ARGS_((char *value, XColor *color));
  /*
   *----------------------------------------------------------------------
   *
   * 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;
  }
  /* End of tkwincolor.c */

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changed lines


 
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+Added in v.71

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