Import Tk 8.5.15 (as of svn r89086)
This commit is contained in:
617
win/tkWinColor.c
Normal file
617
win/tkWinColor.c
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@@ -0,0 +1,617 @@
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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 of
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* this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*/
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#include "tkWinInt.h"
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#include "tkColor.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 is not
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* a "live" system color. */
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} WinColor;
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/*
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* The sysColors array contains the names and index values for the Windows
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* indirect system color names. In use, all of the names will have the string
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* "System" prepended, but we omit it in the table 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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typedef struct ThreadSpecificData {
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int ncolors;
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} ThreadSpecificData;
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static Tcl_ThreadDataKey dataKey;
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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(const char *name, XColor *colorPtr,
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int *indexPtr);
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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 specified
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* 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 will be
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* 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(
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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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ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
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Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
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/*
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* Count the number of elements in the color array if we haven't done so
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* yet.
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*/
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if (tsdPtr->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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tsdPtr->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 = tsdPtr->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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/*
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* x257 is (value<<8 + value) to get the properly bit shifted and padded
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* value. [Bug: 4919]
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*/
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colorPtr->red = GetRValue(colorPtr->pixel) * 257;
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colorPtr->green = GetGValue(colorPtr->pixel) * 257;
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colorPtr->blue = GetBValue(colorPtr->pixel) * 257;
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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 structure.
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*
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*----------------------------------------------------------------------
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*/
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TkColor *
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TkpGetColor(
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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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* system 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 color
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* is found, allocate a new WinColor and store the XColor and the system
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* 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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|| TkParseColor(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, locate
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* a pixel value to use to draw that color in a given 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 indicates
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* the closest red, blue, and green intensities available to those
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* specified in colorPtr, and also specifies a pixel value to use to draw
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* 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. Allocates
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* 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(
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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 the
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* given color.
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*
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*----------------------------------------------------------------------
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*/
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void
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TkpFreeColor(
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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 to create
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* 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, then
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* the corresponding GetSysColor() index is returned. Otherwise, -1 is
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* 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(
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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 returns
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* 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(
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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 we may
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* get values for index that are above the current size of the
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* palette. This happens because we don't shrink the size of the
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* palette object when we deallocate colors so there may be stale
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* values that match in the upper slots. We should ignore those values
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* and just put the new color in as if the colors 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) {
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color->red = closeEntry.peRed * 257;
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color->green = closeEntry.peGreen * 257;
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color->blue = closeEntry.peBlue * 257;
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entry = closeEntry;
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if (index >= cmap->size) {
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OutputDebugString("XAllocColor: Colormap is bigger than we thought");
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}
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} else {
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cmap->size++;
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ResizePalette(cmap->palette, cmap->size);
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SetPaletteEntries(cmap->palette, cmap->size - 1, 1, &entry);
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}
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}
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color->pixel = PALETTERGB(entry.peRed, entry.peGreen, entry.peBlue);
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entryPtr = Tcl_CreateHashEntry(&cmap->refCounts,
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INT2PTR(color->pixel), &new);
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if (new) {
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refCount = 1;
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} else {
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refCount = (PTR2INT(Tcl_GetHashValue(entryPtr))) + 1;
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}
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Tcl_SetHashValue(entryPtr, INT2PTR(refCount));
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} else {
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/*
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* Determine what color will actually be used on non-colormap systems.
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*/
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color->pixel = GetNearestColor(dc,
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RGB(entry.peRed, entry.peGreen, entry.peBlue));
|
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color->red = GetRValue(color->pixel) * 257;
|
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color->green = GetGValue(color->pixel) * 257;
|
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color->blue = GetBValue(color->pixel) * 257;
|
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}
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ReleaseDC(NULL, dc);
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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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* XFreeColors --
|
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*
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* Deallocate a block of colors.
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*
|
||||
* Results:
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* None.
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||||
*
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* Side effects:
|
||||
* Removes entries for the current palette and compacts the remaining
|
||||
* set.
|
||||
*
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||||
*----------------------------------------------------------------------
|
||||
*/
|
||||
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int
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XFreeColors(
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||||
Display *display,
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||||
Colormap colormap,
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||||
unsigned long *pixels,
|
||||
int npixels,
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||||
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, INT2PTR(pixels[i]));
|
||||
if (!entryPtr) {
|
||||
Tcl_Panic("Tried to free a color that isn't allocated.");
|
||||
}
|
||||
refCount = PTR2INT(Tcl_GetHashValue(entryPtr)) - 1;
|
||||
if (refCount == 0) {
|
||||
cref = pixels[i] & 0x00ffffff;
|
||||
index = GetNearestPaletteIndex(cmap->palette, cref);
|
||||
GetPaletteEntries(cmap->palette, index, 1, &entry);
|
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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 {
|
||||
Tcl_Panic("Tried to free a color that isn't allocated.");
|
||||
}
|
||||
Tcl_DeleteHashEntry(entryPtr);
|
||||
} else {
|
||||
Tcl_SetHashValue(entryPtr, INT2PTR(refCount));
|
||||
}
|
||||
}
|
||||
}
|
||||
ReleaseDC(NULL, dc);
|
||||
return Success;
|
||||
}
|
||||
|
||||
/*
|
||||
*----------------------------------------------------------------------
|
||||
*
|
||||
* XCreateColormap --
|
||||
*
|
||||
* Allocate a new colormap.
|
||||
*
|
||||
* Results:
|
||||
* Returns a newly allocated colormap.
|
||||
*
|
||||
* Side effects:
|
||||
* Allocates an empty palette and color list.
|
||||
*
|
||||
*----------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
Colormap
|
||||
XCreateColormap(
|
||||
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, INT2PTR(PALETTERGB(
|
||||
entryPtr->peRed, entryPtr->peGreen, entryPtr->peBlue)), &new);
|
||||
Tcl_SetHashValue(hashPtr, INT2PTR(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.
|
||||
*
|
||||
*----------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
int
|
||||
XFreeColormap(
|
||||
Display *display,
|
||||
Colormap colormap)
|
||||
{
|
||||
TkWinColormap *cmap = (TkWinColormap *) colormap;
|
||||
|
||||
if (!DeleteObject(cmap->palette)) {
|
||||
Tcl_Panic("Unable to free colormap, palette is still selected.");
|
||||
}
|
||||
Tcl_DeleteHashTable(&cmap->refCounts);
|
||||
ckfree((char *) cmap);
|
||||
return Success;
|
||||
}
|
||||
|
||||
/*
|
||||
*----------------------------------------------------------------------
|
||||
*
|
||||
* 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(
|
||||
HDC dc,
|
||||
Colormap colormap)
|
||||
{
|
||||
TkWinColormap *cmap = (TkWinColormap *) colormap;
|
||||
HPALETTE oldPalette;
|
||||
|
||||
oldPalette = SelectPalette(dc, cmap->palette,
|
||||
(cmap->palette == TkWinGetSystemPalette()) ? FALSE : TRUE);
|
||||
RealizePalette(dc);
|
||||
return oldPalette;
|
||||
}
|
||||
|
||||
/*
|
||||
* Local Variables:
|
||||
* mode: c
|
||||
* c-basic-offset: 4
|
||||
* fill-column: 78
|
||||
* End:
|
||||
*/
|
||||
Reference in New Issue
Block a user