/*
|
/*
|
* tkVisual.c --
|
* tkVisual.c --
|
*
|
*
|
* This file contains library procedures for allocating and
|
* This file contains library procedures for allocating and
|
* freeing visuals and colormaps. This code is based on a
|
* freeing visuals and colormaps. This code is based on a
|
* prototype implementation by Paul Mackerras.
|
* prototype implementation by Paul Mackerras.
|
*
|
*
|
* Copyright (c) 1994 The Regents of the University of California.
|
* Copyright (c) 1994 The Regents of the University of California.
|
* Copyright (c) 1994-1995 Sun Microsystems, Inc.
|
* Copyright (c) 1994-1995 Sun Microsystems, Inc.
|
*
|
*
|
* See the file "license.terms" for information on usage and redistribution
|
* See the file "license.terms" for information on usage and redistribution
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
*
|
*
|
* RCS: @(#) $Id: tkVisual.c,v 1.1.1.1 2002-01-16 10:25:53 markom Exp $
|
* RCS: @(#) $Id: tkVisual.c,v 1.1.1.1 2002-01-16 10:25:53 markom Exp $
|
*/
|
*/
|
|
|
#include "tkInt.h"
|
#include "tkInt.h"
|
#include "tkPort.h"
|
#include "tkPort.h"
|
|
|
/*
|
/*
|
* The table below maps from symbolic names for visual classes
|
* The table below maps from symbolic names for visual classes
|
* to the associated X class symbols.
|
* to the associated X class symbols.
|
*/
|
*/
|
|
|
typedef struct VisualDictionary {
|
typedef struct VisualDictionary {
|
char *name; /* Textual name of class. */
|
char *name; /* Textual name of class. */
|
int minLength; /* Minimum # characters that must be
|
int minLength; /* Minimum # characters that must be
|
* specified for an unambiguous match. */
|
* specified for an unambiguous match. */
|
int class; /* X symbol for class. */
|
int class; /* X symbol for class. */
|
} VisualDictionary;
|
} VisualDictionary;
|
static VisualDictionary visualNames[] = {
|
static VisualDictionary visualNames[] = {
|
{"best", 1, 0},
|
{"best", 1, 0},
|
{"directcolor", 2, DirectColor},
|
{"directcolor", 2, DirectColor},
|
{"grayscale", 1, GrayScale},
|
{"grayscale", 1, GrayScale},
|
{"greyscale", 1, GrayScale},
|
{"greyscale", 1, GrayScale},
|
{"pseudocolor", 1, PseudoColor},
|
{"pseudocolor", 1, PseudoColor},
|
{"staticcolor", 7, StaticColor},
|
{"staticcolor", 7, StaticColor},
|
{"staticgray", 7, StaticGray},
|
{"staticgray", 7, StaticGray},
|
{"staticgrey", 7, StaticGray},
|
{"staticgrey", 7, StaticGray},
|
{"truecolor", 1, TrueColor},
|
{"truecolor", 1, TrueColor},
|
{NULL, 0, 0},
|
{NULL, 0, 0},
|
};
|
};
|
|
|
/*
|
/*
|
* One of the following structures exists for each distinct non-default
|
* One of the following structures exists for each distinct non-default
|
* colormap allocated for a display by Tk_GetColormap.
|
* colormap allocated for a display by Tk_GetColormap.
|
*/
|
*/
|
|
|
struct TkColormap {
|
struct TkColormap {
|
Colormap colormap; /* X's identifier for the colormap. */
|
Colormap colormap; /* X's identifier for the colormap. */
|
Visual *visual; /* Visual for which colormap was
|
Visual *visual; /* Visual for which colormap was
|
* allocated. */
|
* allocated. */
|
int refCount; /* How many uses of the colormap are still
|
int refCount; /* How many uses of the colormap are still
|
* outstanding (calls to Tk_GetColormap
|
* outstanding (calls to Tk_GetColormap
|
* minus calls to Tk_FreeColormap). */
|
* minus calls to Tk_FreeColormap). */
|
int shareable; /* 0 means this colormap was allocated by
|
int shareable; /* 0 means this colormap was allocated by
|
* a call to Tk_GetColormap with "new",
|
* a call to Tk_GetColormap with "new",
|
* implying that the window wants it all
|
* implying that the window wants it all
|
* for itself. 1 means that the colormap
|
* for itself. 1 means that the colormap
|
* was allocated as a default for a particular
|
* was allocated as a default for a particular
|
* visual, so it can be shared. */
|
* visual, so it can be shared. */
|
struct TkColormap *nextPtr; /* Next in list of colormaps for this display,
|
struct TkColormap *nextPtr; /* Next in list of colormaps for this display,
|
* or NULL for end of list. */
|
* or NULL for end of list. */
|
};
|
};
|
|
|
/*
|
/*
|
*----------------------------------------------------------------------
|
*----------------------------------------------------------------------
|
*
|
*
|
* Tk_GetVisual --
|
* Tk_GetVisual --
|
*
|
*
|
* Given a string identifying a particular kind of visual, this
|
* Given a string identifying a particular kind of visual, this
|
* procedure returns a visual and depth that matches the specification.
|
* procedure returns a visual and depth that matches the specification.
|
*
|
*
|
* Results:
|
* Results:
|
* The return value is normally a pointer to a visual. If an
|
* The return value is normally a pointer to a visual. If an
|
* error occurred in looking up the visual, NULL is returned and
|
* error occurred in looking up the visual, NULL is returned and
|
* an error message is left in interp->result. The depth of the
|
* an error message is left in interp->result. The depth of the
|
* visual is returned to *depthPtr under normal returns. If
|
* visual is returned to *depthPtr under normal returns. If
|
* colormapPtr is non-NULL, then this procedure also finds a
|
* colormapPtr is non-NULL, then this procedure also finds a
|
* suitable colormap for use with the visual in tkwin, and it
|
* suitable colormap for use with the visual in tkwin, and it
|
* returns that colormap in *colormapPtr unless an error occurs.
|
* returns that colormap in *colormapPtr unless an error occurs.
|
*
|
*
|
* Side effects:
|
* Side effects:
|
* A new colormap may be allocated.
|
* A new colormap may be allocated.
|
*
|
*
|
*----------------------------------------------------------------------
|
*----------------------------------------------------------------------
|
*/
|
*/
|
|
|
Visual *
|
Visual *
|
Tk_GetVisual(interp, tkwin, string, depthPtr, colormapPtr)
|
Tk_GetVisual(interp, tkwin, string, depthPtr, colormapPtr)
|
Tcl_Interp *interp; /* Interpreter to use for error
|
Tcl_Interp *interp; /* Interpreter to use for error
|
* reporting. */
|
* reporting. */
|
Tk_Window tkwin; /* Window in which visual will be
|
Tk_Window tkwin; /* Window in which visual will be
|
* used. */
|
* used. */
|
char *string; /* String describing visual. See
|
char *string; /* String describing visual. See
|
* manual entry for details. */
|
* manual entry for details. */
|
int *depthPtr; /* The depth of the returned visual
|
int *depthPtr; /* The depth of the returned visual
|
* is stored here. */
|
* is stored here. */
|
Colormap *colormapPtr; /* If non-NULL, then a suitable
|
Colormap *colormapPtr; /* If non-NULL, then a suitable
|
* colormap for visual is placed here.
|
* colormap for visual is placed here.
|
* This colormap must eventually be
|
* This colormap must eventually be
|
* freed by calling Tk_FreeColormap. */
|
* freed by calling Tk_FreeColormap. */
|
{
|
{
|
Tk_Window tkwin2;
|
Tk_Window tkwin2;
|
XVisualInfo template, *visInfoList, *bestPtr;
|
XVisualInfo template, *visInfoList, *bestPtr;
|
long mask;
|
long mask;
|
Visual *visual;
|
Visual *visual;
|
int length, c, numVisuals, prio, bestPrio, i;
|
int length, c, numVisuals, prio, bestPrio, i;
|
char *p;
|
char *p;
|
VisualDictionary *dictPtr;
|
VisualDictionary *dictPtr;
|
TkColormap *cmapPtr;
|
TkColormap *cmapPtr;
|
TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr;
|
TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr;
|
|
|
/*
|
/*
|
* Parse string and set up a template for use in searching for
|
* Parse string and set up a template for use in searching for
|
* an appropriate visual.
|
* an appropriate visual.
|
*/
|
*/
|
|
|
c = string[0];
|
c = string[0];
|
if (c == '.') {
|
if (c == '.') {
|
/*
|
/*
|
* The string must be a window name. If the window is on the
|
* The string must be a window name. If the window is on the
|
* same screen as tkwin, then just use its visual. Otherwise
|
* same screen as tkwin, then just use its visual. Otherwise
|
* use the information about the visual as a template for the
|
* use the information about the visual as a template for the
|
* search.
|
* search.
|
*/
|
*/
|
|
|
tkwin2 = Tk_NameToWindow(interp, string, tkwin);
|
tkwin2 = Tk_NameToWindow(interp, string, tkwin);
|
if (tkwin2 == NULL) {
|
if (tkwin2 == NULL) {
|
return NULL;
|
return NULL;
|
}
|
}
|
visual = Tk_Visual(tkwin2);
|
visual = Tk_Visual(tkwin2);
|
if (Tk_Screen(tkwin) == Tk_Screen(tkwin2)) {
|
if (Tk_Screen(tkwin) == Tk_Screen(tkwin2)) {
|
*depthPtr = Tk_Depth(tkwin2);
|
*depthPtr = Tk_Depth(tkwin2);
|
if (colormapPtr != NULL) {
|
if (colormapPtr != NULL) {
|
/*
|
/*
|
* Use the colormap from the other window too (but be sure
|
* Use the colormap from the other window too (but be sure
|
* to increment its reference count if it's one of the ones
|
* to increment its reference count if it's one of the ones
|
* allocated here).
|
* allocated here).
|
*/
|
*/
|
|
|
*colormapPtr = Tk_Colormap(tkwin2);
|
*colormapPtr = Tk_Colormap(tkwin2);
|
for (cmapPtr = dispPtr->cmapPtr; cmapPtr != NULL;
|
for (cmapPtr = dispPtr->cmapPtr; cmapPtr != NULL;
|
cmapPtr = cmapPtr->nextPtr) {
|
cmapPtr = cmapPtr->nextPtr) {
|
if (cmapPtr->colormap == *colormapPtr) {
|
if (cmapPtr->colormap == *colormapPtr) {
|
cmapPtr->refCount += 1;
|
cmapPtr->refCount += 1;
|
break;
|
break;
|
}
|
}
|
}
|
}
|
}
|
}
|
return visual;
|
return visual;
|
}
|
}
|
template.depth = Tk_Depth(tkwin2);
|
template.depth = Tk_Depth(tkwin2);
|
template.class = visual->class;
|
template.class = visual->class;
|
template.red_mask = visual->red_mask;
|
template.red_mask = visual->red_mask;
|
template.green_mask = visual->green_mask;
|
template.green_mask = visual->green_mask;
|
template.blue_mask = visual->blue_mask;
|
template.blue_mask = visual->blue_mask;
|
template.colormap_size = visual->map_entries;
|
template.colormap_size = visual->map_entries;
|
template.bits_per_rgb = visual->bits_per_rgb;
|
template.bits_per_rgb = visual->bits_per_rgb;
|
mask = VisualDepthMask|VisualClassMask|VisualRedMaskMask
|
mask = VisualDepthMask|VisualClassMask|VisualRedMaskMask
|
|VisualGreenMaskMask|VisualBlueMaskMask|VisualColormapSizeMask
|
|VisualGreenMaskMask|VisualBlueMaskMask|VisualColormapSizeMask
|
|VisualBitsPerRGBMask;
|
|VisualBitsPerRGBMask;
|
} else if ((c == 0) || ((c == 'd') && (string[1] != 0)
|
} else if ((c == 0) || ((c == 'd') && (string[1] != 0)
|
&& (strncmp(string, "default", strlen(string)) == 0))) {
|
&& (strncmp(string, "default", strlen(string)) == 0))) {
|
/*
|
/*
|
* Use the default visual for the window's screen.
|
* Use the default visual for the window's screen.
|
*/
|
*/
|
|
|
if (colormapPtr != NULL) {
|
if (colormapPtr != NULL) {
|
*colormapPtr = DefaultColormapOfScreen(Tk_Screen(tkwin));
|
*colormapPtr = DefaultColormapOfScreen(Tk_Screen(tkwin));
|
}
|
}
|
*depthPtr = DefaultDepthOfScreen(Tk_Screen(tkwin));
|
*depthPtr = DefaultDepthOfScreen(Tk_Screen(tkwin));
|
return DefaultVisualOfScreen(Tk_Screen(tkwin));
|
return DefaultVisualOfScreen(Tk_Screen(tkwin));
|
} else if (isdigit(UCHAR(c))) {
|
} else if (isdigit(UCHAR(c))) {
|
int visualId;
|
int visualId;
|
|
|
/*
|
/*
|
* This is a visual ID.
|
* This is a visual ID.
|
*/
|
*/
|
|
|
if (Tcl_GetInt(interp, string, &visualId) == TCL_ERROR) {
|
if (Tcl_GetInt(interp, string, &visualId) == TCL_ERROR) {
|
Tcl_ResetResult(interp);
|
Tcl_ResetResult(interp);
|
Tcl_AppendResult(interp, "bad X identifier for visual: ",
|
Tcl_AppendResult(interp, "bad X identifier for visual: ",
|
string, "\"", (char *) NULL);
|
string, "\"", (char *) NULL);
|
return NULL;
|
return NULL;
|
}
|
}
|
template.visualid = visualId;
|
template.visualid = visualId;
|
mask = VisualIDMask;
|
mask = VisualIDMask;
|
} else {
|
} else {
|
/*
|
/*
|
* Parse the string into a class name (or "best") optionally
|
* Parse the string into a class name (or "best") optionally
|
* followed by whitespace and a depth.
|
* followed by whitespace and a depth.
|
*/
|
*/
|
|
|
for (p = string; *p != 0; p++) {
|
for (p = string; *p != 0; p++) {
|
if (isspace(UCHAR(*p)) || isdigit(UCHAR(*p))) {
|
if (isspace(UCHAR(*p)) || isdigit(UCHAR(*p))) {
|
break;
|
break;
|
}
|
}
|
}
|
}
|
length = p - string;
|
length = p - string;
|
template.class = -1;
|
template.class = -1;
|
for (dictPtr = visualNames; dictPtr->name != NULL; dictPtr++) {
|
for (dictPtr = visualNames; dictPtr->name != NULL; dictPtr++) {
|
if ((dictPtr->name[0] == c) && (length >= dictPtr->minLength)
|
if ((dictPtr->name[0] == c) && (length >= dictPtr->minLength)
|
&& (strncmp(string, dictPtr->name,
|
&& (strncmp(string, dictPtr->name,
|
(size_t) length) == 0)) {
|
(size_t) length) == 0)) {
|
template.class = dictPtr->class;
|
template.class = dictPtr->class;
|
break;
|
break;
|
}
|
}
|
}
|
}
|
if (template.class == -1) {
|
if (template.class == -1) {
|
Tcl_AppendResult(interp, "unknown or ambiguous visual name \"",
|
Tcl_AppendResult(interp, "unknown or ambiguous visual name \"",
|
string, "\": class must be ", (char *) NULL);
|
string, "\": class must be ", (char *) NULL);
|
for (dictPtr = visualNames; dictPtr->name != NULL; dictPtr++) {
|
for (dictPtr = visualNames; dictPtr->name != NULL; dictPtr++) {
|
Tcl_AppendResult(interp, dictPtr->name, ", ", (char *) NULL);
|
Tcl_AppendResult(interp, dictPtr->name, ", ", (char *) NULL);
|
}
|
}
|
Tcl_AppendResult(interp, "or default", (char *) NULL);
|
Tcl_AppendResult(interp, "or default", (char *) NULL);
|
return NULL;
|
return NULL;
|
}
|
}
|
while (isspace(UCHAR(*p))) {
|
while (isspace(UCHAR(*p))) {
|
p++;
|
p++;
|
}
|
}
|
if (*p == 0) {
|
if (*p == 0) {
|
template.depth = 10000;
|
template.depth = 10000;
|
} else {
|
} else {
|
if (Tcl_GetInt(interp, p, &template.depth) != TCL_OK) {
|
if (Tcl_GetInt(interp, p, &template.depth) != TCL_OK) {
|
return NULL;
|
return NULL;
|
}
|
}
|
}
|
}
|
if (c == 'b') {
|
if (c == 'b') {
|
mask = 0;
|
mask = 0;
|
} else {
|
} else {
|
mask = VisualClassMask;
|
mask = VisualClassMask;
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
* Find all visuals that match the template we've just created,
|
* Find all visuals that match the template we've just created,
|
* and return an error if there are none that match.
|
* and return an error if there are none that match.
|
*/
|
*/
|
|
|
template.screen = Tk_ScreenNumber(tkwin);
|
template.screen = Tk_ScreenNumber(tkwin);
|
mask |= VisualScreenMask;
|
mask |= VisualScreenMask;
|
visInfoList = XGetVisualInfo(Tk_Display(tkwin), mask, &template,
|
visInfoList = XGetVisualInfo(Tk_Display(tkwin), mask, &template,
|
&numVisuals);
|
&numVisuals);
|
if (visInfoList == NULL) {
|
if (visInfoList == NULL) {
|
interp->result = "couldn't find an appropriate visual";
|
interp->result = "couldn't find an appropriate visual";
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
/*
|
/*
|
* Search through the visuals that were returned to find the best
|
* Search through the visuals that were returned to find the best
|
* one. The choice is based on the following criteria, in decreasing
|
* one. The choice is based on the following criteria, in decreasing
|
* order of importance:
|
* order of importance:
|
*
|
*
|
* 1. Depth: choose a visual with exactly the desired depth,
|
* 1. Depth: choose a visual with exactly the desired depth,
|
* else one with more bits than requested but as few bits
|
* else one with more bits than requested but as few bits
|
* as possible, else one with fewer bits but as many as
|
* as possible, else one with fewer bits but as many as
|
* possible.
|
* possible.
|
* 2. Class: some visual classes are more desirable than others;
|
* 2. Class: some visual classes are more desirable than others;
|
* pick the visual with the most desirable class.
|
* pick the visual with the most desirable class.
|
* 3. Default: the default visual for the screen gets preference
|
* 3. Default: the default visual for the screen gets preference
|
* over other visuals, all else being equal.
|
* over other visuals, all else being equal.
|
*/
|
*/
|
|
|
bestPrio = 0;
|
bestPrio = 0;
|
bestPtr = NULL;
|
bestPtr = NULL;
|
for (i = 0; i < numVisuals; i++) {
|
for (i = 0; i < numVisuals; i++) {
|
switch (visInfoList[i].class) {
|
switch (visInfoList[i].class) {
|
case DirectColor: prio = 5; break;
|
case DirectColor: prio = 5; break;
|
case GrayScale: prio = 1; break;
|
case GrayScale: prio = 1; break;
|
case PseudoColor: prio = 7; break;
|
case PseudoColor: prio = 7; break;
|
case StaticColor: prio = 3; break;
|
case StaticColor: prio = 3; break;
|
case StaticGray: prio = 1; break;
|
case StaticGray: prio = 1; break;
|
case TrueColor: prio = 5; break;
|
case TrueColor: prio = 5; break;
|
default: prio = 0; break;
|
default: prio = 0; break;
|
}
|
}
|
if (visInfoList[i].visual
|
if (visInfoList[i].visual
|
== DefaultVisualOfScreen(Tk_Screen(tkwin))) {
|
== DefaultVisualOfScreen(Tk_Screen(tkwin))) {
|
prio++;
|
prio++;
|
}
|
}
|
if (bestPtr == NULL) {
|
if (bestPtr == NULL) {
|
goto newBest;
|
goto newBest;
|
}
|
}
|
if (visInfoList[i].depth < bestPtr->depth) {
|
if (visInfoList[i].depth < bestPtr->depth) {
|
if (visInfoList[i].depth >= template.depth) {
|
if (visInfoList[i].depth >= template.depth) {
|
goto newBest;
|
goto newBest;
|
}
|
}
|
} else if (visInfoList[i].depth > bestPtr->depth) {
|
} else if (visInfoList[i].depth > bestPtr->depth) {
|
if (bestPtr->depth < template.depth) {
|
if (bestPtr->depth < template.depth) {
|
goto newBest;
|
goto newBest;
|
}
|
}
|
} else {
|
} else {
|
if (prio > bestPrio) {
|
if (prio > bestPrio) {
|
goto newBest;
|
goto newBest;
|
}
|
}
|
}
|
}
|
continue;
|
continue;
|
|
|
newBest:
|
newBest:
|
bestPtr = &visInfoList[i];
|
bestPtr = &visInfoList[i];
|
bestPrio = prio;
|
bestPrio = prio;
|
}
|
}
|
*depthPtr = bestPtr->depth;
|
*depthPtr = bestPtr->depth;
|
visual = bestPtr->visual;
|
visual = bestPtr->visual;
|
XFree((char *) visInfoList);
|
XFree((char *) visInfoList);
|
|
|
/*
|
/*
|
* If we need to find a colormap for this visual, do it now.
|
* If we need to find a colormap for this visual, do it now.
|
* If the visual is the default visual for the screen, then
|
* If the visual is the default visual for the screen, then
|
* use the default colormap. Otherwise search for an existing
|
* use the default colormap. Otherwise search for an existing
|
* colormap that's shareable. If all else fails, create a new
|
* colormap that's shareable. If all else fails, create a new
|
* colormap.
|
* colormap.
|
*/
|
*/
|
|
|
if (colormapPtr != NULL) {
|
if (colormapPtr != NULL) {
|
if (visual == DefaultVisualOfScreen(Tk_Screen(tkwin))) {
|
if (visual == DefaultVisualOfScreen(Tk_Screen(tkwin))) {
|
*colormapPtr = DefaultColormapOfScreen(Tk_Screen(tkwin));
|
*colormapPtr = DefaultColormapOfScreen(Tk_Screen(tkwin));
|
} else {
|
} else {
|
for (cmapPtr = dispPtr->cmapPtr; cmapPtr != NULL;
|
for (cmapPtr = dispPtr->cmapPtr; cmapPtr != NULL;
|
cmapPtr = cmapPtr->nextPtr) {
|
cmapPtr = cmapPtr->nextPtr) {
|
if (cmapPtr->shareable && (cmapPtr->visual == visual)) {
|
if (cmapPtr->shareable && (cmapPtr->visual == visual)) {
|
*colormapPtr = cmapPtr->colormap;
|
*colormapPtr = cmapPtr->colormap;
|
cmapPtr->refCount += 1;
|
cmapPtr->refCount += 1;
|
goto done;
|
goto done;
|
}
|
}
|
}
|
}
|
cmapPtr = (TkColormap *) ckalloc(sizeof(TkColormap));
|
cmapPtr = (TkColormap *) ckalloc(sizeof(TkColormap));
|
cmapPtr->colormap = XCreateColormap(Tk_Display(tkwin),
|
cmapPtr->colormap = XCreateColormap(Tk_Display(tkwin),
|
RootWindowOfScreen(Tk_Screen(tkwin)), visual,
|
RootWindowOfScreen(Tk_Screen(tkwin)), visual,
|
AllocNone);
|
AllocNone);
|
cmapPtr->visual = visual;
|
cmapPtr->visual = visual;
|
cmapPtr->refCount = 1;
|
cmapPtr->refCount = 1;
|
cmapPtr->shareable = 1;
|
cmapPtr->shareable = 1;
|
cmapPtr->nextPtr = dispPtr->cmapPtr;
|
cmapPtr->nextPtr = dispPtr->cmapPtr;
|
dispPtr->cmapPtr = cmapPtr;
|
dispPtr->cmapPtr = cmapPtr;
|
*colormapPtr = cmapPtr->colormap;
|
*colormapPtr = cmapPtr->colormap;
|
}
|
}
|
}
|
}
|
|
|
done:
|
done:
|
return visual;
|
return visual;
|
}
|
}
|
|
|
/*
|
/*
|
*----------------------------------------------------------------------
|
*----------------------------------------------------------------------
|
*
|
*
|
* Tk_GetColormap --
|
* Tk_GetColormap --
|
*
|
*
|
* Given a string identifying a colormap, this procedure finds
|
* Given a string identifying a colormap, this procedure finds
|
* an appropriate colormap.
|
* an appropriate colormap.
|
*
|
*
|
* Results:
|
* Results:
|
* The return value is normally the X resource identifier for the
|
* The return value is normally the X resource identifier for the
|
* colormap. If an error occurs, None is returned and an error
|
* colormap. If an error occurs, None is returned and an error
|
* message is placed in interp->result.
|
* message is placed in interp->result.
|
*
|
*
|
* Side effects:
|
* Side effects:
|
* A reference count is incremented for the colormap, so
|
* A reference count is incremented for the colormap, so
|
* Tk_FreeColormap must eventually be called exactly once for
|
* Tk_FreeColormap must eventually be called exactly once for
|
* each call to Tk_GetColormap.
|
* each call to Tk_GetColormap.
|
*
|
*
|
*----------------------------------------------------------------------
|
*----------------------------------------------------------------------
|
*/
|
*/
|
|
|
Colormap
|
Colormap
|
Tk_GetColormap(interp, tkwin, string)
|
Tk_GetColormap(interp, tkwin, string)
|
Tcl_Interp *interp; /* Interpreter to use for error
|
Tcl_Interp *interp; /* Interpreter to use for error
|
* reporting. */
|
* reporting. */
|
Tk_Window tkwin; /* Window where colormap will be
|
Tk_Window tkwin; /* Window where colormap will be
|
* used. */
|
* used. */
|
char *string; /* String that identifies colormap:
|
char *string; /* String that identifies colormap:
|
* either "new" or the name of
|
* either "new" or the name of
|
* another window. */
|
* another window. */
|
{
|
{
|
Colormap colormap;
|
Colormap colormap;
|
TkColormap *cmapPtr;
|
TkColormap *cmapPtr;
|
TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr;
|
TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr;
|
Tk_Window other;
|
Tk_Window other;
|
|
|
/*
|
/*
|
* Allocate a new colormap, if that's what is wanted.
|
* Allocate a new colormap, if that's what is wanted.
|
*/
|
*/
|
|
|
if (strcmp(string, "new") == 0) {
|
if (strcmp(string, "new") == 0) {
|
cmapPtr = (TkColormap *) ckalloc(sizeof(TkColormap));
|
cmapPtr = (TkColormap *) ckalloc(sizeof(TkColormap));
|
cmapPtr->colormap = XCreateColormap(Tk_Display(tkwin),
|
cmapPtr->colormap = XCreateColormap(Tk_Display(tkwin),
|
RootWindowOfScreen(Tk_Screen(tkwin)), Tk_Visual(tkwin),
|
RootWindowOfScreen(Tk_Screen(tkwin)), Tk_Visual(tkwin),
|
AllocNone);
|
AllocNone);
|
cmapPtr->visual = Tk_Visual(tkwin);
|
cmapPtr->visual = Tk_Visual(tkwin);
|
cmapPtr->refCount = 1;
|
cmapPtr->refCount = 1;
|
cmapPtr->shareable = 0;
|
cmapPtr->shareable = 0;
|
cmapPtr->nextPtr = dispPtr->cmapPtr;
|
cmapPtr->nextPtr = dispPtr->cmapPtr;
|
dispPtr->cmapPtr = cmapPtr;
|
dispPtr->cmapPtr = cmapPtr;
|
return cmapPtr->colormap;
|
return cmapPtr->colormap;
|
}
|
}
|
|
|
/*
|
/*
|
* Use a colormap from an existing window. It must have the same
|
* Use a colormap from an existing window. It must have the same
|
* visual as tkwin (which means, among other things, that the
|
* visual as tkwin (which means, among other things, that the
|
* other window must be on the same screen).
|
* other window must be on the same screen).
|
*/
|
*/
|
|
|
other = Tk_NameToWindow(interp, string, tkwin);
|
other = Tk_NameToWindow(interp, string, tkwin);
|
if (other == NULL) {
|
if (other == NULL) {
|
return None;
|
return None;
|
}
|
}
|
if (Tk_Screen(other) != Tk_Screen(tkwin)) {
|
if (Tk_Screen(other) != Tk_Screen(tkwin)) {
|
Tcl_AppendResult(interp, "can't use colormap for ", string,
|
Tcl_AppendResult(interp, "can't use colormap for ", string,
|
": not on same screen", (char *) NULL);
|
": not on same screen", (char *) NULL);
|
return None;
|
return None;
|
}
|
}
|
if (Tk_Visual(other) != Tk_Visual(tkwin)) {
|
if (Tk_Visual(other) != Tk_Visual(tkwin)) {
|
Tcl_AppendResult(interp, "can't use colormap for ", string,
|
Tcl_AppendResult(interp, "can't use colormap for ", string,
|
": incompatible visuals", (char *) NULL);
|
": incompatible visuals", (char *) NULL);
|
return None;
|
return None;
|
}
|
}
|
colormap = Tk_Colormap(other);
|
colormap = Tk_Colormap(other);
|
|
|
/*
|
/*
|
* If the colormap was a special one allocated by code in this file,
|
* If the colormap was a special one allocated by code in this file,
|
* increment its reference count.
|
* increment its reference count.
|
*/
|
*/
|
|
|
for (cmapPtr = dispPtr->cmapPtr; cmapPtr != NULL;
|
for (cmapPtr = dispPtr->cmapPtr; cmapPtr != NULL;
|
cmapPtr = cmapPtr->nextPtr) {
|
cmapPtr = cmapPtr->nextPtr) {
|
if (cmapPtr->colormap == colormap) {
|
if (cmapPtr->colormap == colormap) {
|
cmapPtr->refCount += 1;
|
cmapPtr->refCount += 1;
|
}
|
}
|
}
|
}
|
return colormap;
|
return colormap;
|
}
|
}
|
|
|
/*
|
/*
|
*----------------------------------------------------------------------
|
*----------------------------------------------------------------------
|
*
|
*
|
* Tk_FreeColormap --
|
* Tk_FreeColormap --
|
*
|
*
|
* This procedure is called to release a colormap that was
|
* This procedure is called to release a colormap that was
|
* previously allocated by Tk_GetColormap.
|
* previously allocated by Tk_GetColormap.
|
*
|
*
|
* Results:
|
* Results:
|
* None.
|
* None.
|
*
|
*
|
* Side effects:
|
* Side effects:
|
* The colormap's reference count is decremented. If this was the
|
* The colormap's reference count is decremented. If this was the
|
* last reference to the colormap, then the colormap is freed.
|
* last reference to the colormap, then the colormap is freed.
|
*
|
*
|
*----------------------------------------------------------------------
|
*----------------------------------------------------------------------
|
*/
|
*/
|
|
|
void
|
void
|
Tk_FreeColormap(display, colormap)
|
Tk_FreeColormap(display, colormap)
|
Display *display; /* Display for which colormap was
|
Display *display; /* Display for which colormap was
|
* allocated. */
|
* allocated. */
|
Colormap colormap; /* Colormap that is no longer needed.
|
Colormap colormap; /* Colormap that is no longer needed.
|
* Must have been returned by previous
|
* Must have been returned by previous
|
* call to Tk_GetColormap, or
|
* call to Tk_GetColormap, or
|
* preserved by a previous call to
|
* preserved by a previous call to
|
* Tk_PreserveColormap. */
|
* Tk_PreserveColormap. */
|
{
|
{
|
TkDisplay *dispPtr;
|
TkDisplay *dispPtr;
|
TkColormap *cmapPtr, *prevPtr;
|
TkColormap *cmapPtr, *prevPtr;
|
|
|
/*
|
/*
|
* Find Tk's information about the display, then see if this
|
* Find Tk's information about the display, then see if this
|
* colormap is a non-default one (if it's a default one, there
|
* colormap is a non-default one (if it's a default one, there
|
* won't be an entry for it in the display's list).
|
* won't be an entry for it in the display's list).
|
*/
|
*/
|
|
|
dispPtr = TkGetDisplay(display);
|
dispPtr = TkGetDisplay(display);
|
if (dispPtr == NULL) {
|
if (dispPtr == NULL) {
|
panic("unknown display passed to Tk_FreeColormap");
|
panic("unknown display passed to Tk_FreeColormap");
|
}
|
}
|
for (prevPtr = NULL, cmapPtr = dispPtr->cmapPtr; cmapPtr != NULL;
|
for (prevPtr = NULL, cmapPtr = dispPtr->cmapPtr; cmapPtr != NULL;
|
prevPtr = cmapPtr, cmapPtr = cmapPtr->nextPtr) {
|
prevPtr = cmapPtr, cmapPtr = cmapPtr->nextPtr) {
|
if (cmapPtr->colormap == colormap) {
|
if (cmapPtr->colormap == colormap) {
|
cmapPtr->refCount -= 1;
|
cmapPtr->refCount -= 1;
|
if (cmapPtr->refCount == 0) {
|
if (cmapPtr->refCount == 0) {
|
XFreeColormap(display, colormap);
|
XFreeColormap(display, colormap);
|
if (prevPtr == NULL) {
|
if (prevPtr == NULL) {
|
dispPtr->cmapPtr = cmapPtr->nextPtr;
|
dispPtr->cmapPtr = cmapPtr->nextPtr;
|
} else {
|
} else {
|
prevPtr->nextPtr = cmapPtr->nextPtr;
|
prevPtr->nextPtr = cmapPtr->nextPtr;
|
}
|
}
|
ckfree((char *) cmapPtr);
|
ckfree((char *) cmapPtr);
|
}
|
}
|
return;
|
return;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
/*
|
/*
|
*----------------------------------------------------------------------
|
*----------------------------------------------------------------------
|
*
|
*
|
* Tk_PreserveColormap --
|
* Tk_PreserveColormap --
|
*
|
*
|
* This procedure is called to indicate to Tk that the specified
|
* This procedure is called to indicate to Tk that the specified
|
* colormap is being referenced from another location and should
|
* colormap is being referenced from another location and should
|
* not be freed until all extra references are eliminated. The
|
* not be freed until all extra references are eliminated. The
|
* colormap must have been returned by Tk_GetColormap.
|
* colormap must have been returned by Tk_GetColormap.
|
*
|
*
|
* Results:
|
* Results:
|
* None.
|
* None.
|
*
|
*
|
* Side effects:
|
* Side effects:
|
* The colormap's reference count is incremented, so
|
* The colormap's reference count is incremented, so
|
* Tk_FreeColormap must eventually be called exactly once for
|
* Tk_FreeColormap must eventually be called exactly once for
|
* each call to Tk_PreserveColormap.
|
* each call to Tk_PreserveColormap.
|
*
|
*
|
*----------------------------------------------------------------------
|
*----------------------------------------------------------------------
|
*/
|
*/
|
|
|
void
|
void
|
Tk_PreserveColormap(display, colormap)
|
Tk_PreserveColormap(display, colormap)
|
Display *display; /* Display for which colormap was
|
Display *display; /* Display for which colormap was
|
* allocated. */
|
* allocated. */
|
Colormap colormap; /* Colormap that should be
|
Colormap colormap; /* Colormap that should be
|
* preserved. */
|
* preserved. */
|
{
|
{
|
TkDisplay *dispPtr;
|
TkDisplay *dispPtr;
|
TkColormap *cmapPtr;
|
TkColormap *cmapPtr;
|
|
|
/*
|
/*
|
* Find Tk's information about the display, then see if this
|
* Find Tk's information about the display, then see if this
|
* colormap is a non-default one (if it's a default one, there
|
* colormap is a non-default one (if it's a default one, there
|
* won't be an entry for it in the display's list).
|
* won't be an entry for it in the display's list).
|
*/
|
*/
|
|
|
dispPtr = TkGetDisplay(display);
|
dispPtr = TkGetDisplay(display);
|
if (dispPtr == NULL) {
|
if (dispPtr == NULL) {
|
panic("unknown display passed to Tk_PreserveColormap");
|
panic("unknown display passed to Tk_PreserveColormap");
|
}
|
}
|
for (cmapPtr = dispPtr->cmapPtr; cmapPtr != NULL;
|
for (cmapPtr = dispPtr->cmapPtr; cmapPtr != NULL;
|
cmapPtr = cmapPtr->nextPtr) {
|
cmapPtr = cmapPtr->nextPtr) {
|
if (cmapPtr->colormap == colormap) {
|
if (cmapPtr->colormap == colormap) {
|
cmapPtr->refCount += 1;
|
cmapPtr->refCount += 1;
|
return;
|
return;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
