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SDL_x11gamma.c
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SDL_x11gamma.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "../SDL_sysvideo.h"
#include "SDL_x11video.h"
static int numCmaps = 0;
typedef struct
{
Display *display;
int scrNum;
XStandardColormap cmap;
Visual visual;
} cmapTableEntry;
cmapTableEntry *cmapTable = NULL;
void
X11_TrackColormap(Display * display, int scrNum,
XStandardColormap * cmap, Visual * visual)
{
int i;
cmapTableEntry *newTable = NULL;
/* only tracking DirectColor colormaps because they're the only ones
with gamma ramps */
if (DirectColor != visual->class) {
return;
}
/* search the table to find out if we already have this one. We only
want one entry for each display, screen number, visualid
combination */
for (i = 0; i < numCmaps; i++) {
if (cmapTable[i].display == display &&
cmapTable[i].scrNum == scrNum &&
cmapTable[i].cmap.visualid == cmap->visualid) {
return;
}
}
/* increase the table by one entry. If the table is NULL create the
first entrty */
newTable = SDL_malloc((numCmaps + 1) * sizeof(cmapTableEntry));
if (NULL == newTable) {
SDL_SetError("Out of memory in X11_TrackColormap()");
return;
}
if (NULL != cmapTable) {
SDL_memcpy(newTable, cmapTable, numCmaps * sizeof(cmapTableEntry));
SDL_free(cmapTable);
}
cmapTable = newTable;
cmapTable[numCmaps].display = display;
cmapTable[numCmaps].scrNum = scrNum;
SDL_memcpy(&cmapTable[numCmaps].cmap, cmap, sizeof(XStandardColormap));
SDL_memcpy(&cmapTable[numCmaps].visual, visual, sizeof(Visual));
numCmaps++;
}
int
X11_SetDisplayGammaRamp(_THIS, Uint16 * ramp)
{
return -1;
}
int
X11_GetDisplayGammaRamp(_THIS, Uint16 * ramp)
{
return -1;
}