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xenocara/xserver/hw/xquartz/GL/visualConfigs.c

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/*
* Copyright (c) 2007, 2008 Apple Inc.
* Copyright (c) 2004 Torrey T. Lyons. All Rights Reserved.
* Copyright (c) 2002 Greg Parker. All Rights Reserved.
*
* Portions of this file are copied from Mesa's xf86glx.c,
* which contains the following copyright:
*
* Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "dri.h"
#include <OpenGL/OpenGL.h>
#include <OpenGL/CGLContext.h>
#include <GL/gl.h>
#include <GL/glxproto.h>
#include <windowstr.h>
#include <resource.h>
#include <GL/glxint.h>
#include <GL/glxtokens.h>
#include <scrnintstr.h>
#include <glxserver.h>
#include <glxscreens.h>
#include <glxdrawable.h>
#include <glxcontext.h>
#include <glxext.h>
#include <glxutil.h>
#include <glxscreens.h>
#include <GL/internal/glcore.h>
#include "capabilities.h"
#include "visualConfigs.h"
/* Based originally on code from indirect.c which was based on code from i830_dri.c. */
void setVisualConfigs(void) {
int numConfigs = 0;
__GLXvisualConfig *visualConfigs = NULL;
void **visualPrivates = NULL;
struct glCapabilities caps;
struct glCapabilitiesConfig *conf = NULL;
int stereo, depth, aux, buffers, stencil, accum, color, msample;
int i = 0;
if(getGlCapabilities(&caps)) {
ErrorF("error from getGlCapabilities()!\n");
return;
}
/*
conf->stereo is 0 or 1, but we need at least 1 iteration of the loop,
so we treat a true conf->stereo as 2.
The depth size is 0 or 24. Thus we do 2 iterations for that.
conf->aux_buffers (when available/non-zero) result in 2 iterations instead of 1.
conf->buffers indicates whether we have single or double buffering.
conf->total_stencil_bit_depths
conf->total_color_buffers indicates the RGB/RGBA color depths.
conf->total_accum_buffers iterations for accum (with at least 1 if equal to 0)
conf->total_depth_buffer_depths
conf->multisample_buffers iterations (with at least 1 if equal to 0). We add 1
for the 0 multisampling config.
*/
assert(NULL != caps.configurations);
conf = caps.configurations;
numConfigs = 0;
for(conf = caps.configurations; conf; conf = conf->next) {
if(conf->total_color_buffers <= 0)
continue;
numConfigs += (conf->stereo ? 2 : 1)
* (conf->aux_buffers ? 2 : 1)
* conf->buffers
* ((conf->total_stencil_bit_depths > 0) ? conf->total_stencil_bit_depths : 1)
* conf->total_color_buffers
* ((conf->total_accum_buffers > 0) ? conf->total_accum_buffers : 1)
* conf->total_depth_buffer_depths
* (conf->multisample_buffers + 1);
}
visualConfigs = xcalloc(sizeof(*visualConfigs), numConfigs);
if(NULL == visualConfigs) {
ErrorF("xcalloc failure when allocating visualConfigs\n");
freeGlCapabilities(&caps);
return;
}
visualPrivates = xcalloc(sizeof(void *), numConfigs);
if(NULL == visualPrivates) {
ErrorF("xcalloc failure when allocating visualPrivates");
freeGlCapabilities(&caps);
xfree(visualConfigs);
return;
}
i = 0; /* current buffer */
for(conf = caps.configurations; conf; conf = conf->next) {
for(stereo = 0; stereo < (conf->stereo ? 2 : 1); ++stereo) {
for(aux = 0; aux < (conf->aux_buffers ? 2 : 1); ++aux) {
for(buffers = 0; buffers < conf->buffers; ++buffers) {
for(stencil = 0; stencil < ((conf->total_stencil_bit_depths > 0) ?
conf->total_stencil_bit_depths : 1); ++stencil) {
for(color = 0; color < conf->total_color_buffers; ++color) {
for(accum = 0; accum < ((conf->total_accum_buffers > 0) ?
conf->total_accum_buffers : 1); ++accum) {
for(depth = 0; depth < conf->total_depth_buffer_depths; ++depth) {
for(msample = 0; msample < (conf->multisample_buffers + 1); ++msample) {
visualConfigs[i].vid = (VisualID)(-1);
visualConfigs[i].class = TrueColor;
visualConfigs[i].rgba = true;
visualConfigs[i].redSize = conf->color_buffers[color].r;
visualConfigs[i].greenSize = conf->color_buffers[color].g;
visualConfigs[i].blueSize = conf->color_buffers[color].b;
if(GLCAPS_COLOR_BUF_INVALID_VALUE == conf->color_buffers[color].a) {
/* This visual has no alpha. */
visualConfigs[i].alphaSize = 0;
} else {
visualConfigs[i].alphaSize = conf->color_buffers[color].a;
}
/*
* If the .a/alpha value is unset, then don't add it to the
* bufferSize specification. The INVALID_VALUE indicates that it
* was unset.
*
* This prevents odd bufferSizes, such as 14.
*/
if(GLCAPS_COLOR_BUF_INVALID_VALUE == conf->color_buffers[color].a) {
visualConfigs[i].bufferSize = conf->color_buffers[color].r +
conf->color_buffers[color].g + conf->color_buffers[color].b;
} else {
visualConfigs[i].bufferSize = conf->color_buffers[color].r +
conf->color_buffers[color].g + conf->color_buffers[color].b +
conf->color_buffers[color].a;
}
/*
* I'm uncertain about these masks.
* I don't think we actually care what the values are in our
* libGL, so it doesn't seem to make a difference.
*/
visualConfigs[i].redMask = -1;
visualConfigs[i].greenMask = -1;
visualConfigs[i].blueMask = -1;
visualConfigs[i].alphaMask = -1;
if(conf->total_accum_buffers > 0) {
visualConfigs[i].accumRedSize = conf->accum_buffers[accum].r;
visualConfigs[i].accumGreenSize = conf->accum_buffers[accum].g;
visualConfigs[i].accumBlueSize = conf->accum_buffers[accum].b;
if(GLCAPS_COLOR_BUF_INVALID_VALUE != conf->accum_buffers[accum].a) {
visualConfigs[i].accumAlphaSize = conf->accum_buffers[accum].a;
} else {
visualConfigs[i].accumAlphaSize = 0;
}
} else {
visualConfigs[i].accumRedSize = 0;
visualConfigs[i].accumGreenSize = 0;
visualConfigs[i].accumBlueSize = 0;
visualConfigs[i].accumAlphaSize = 0;
}
visualConfigs[i].doubleBuffer = buffers ? TRUE : FALSE;
visualConfigs[i].stereo = stereo ? TRUE : FALSE;
visualConfigs[i].depthSize = conf->depth_buffers[depth];
if(conf->total_stencil_bit_depths > 0) {
visualConfigs[i].stencilSize = conf->stencil_bit_depths[stencil];
} else {
visualConfigs[i].stencilSize = 0;
}
visualConfigs[i].auxBuffers = aux ? conf->aux_buffers : 0;
visualConfigs[i].level = 0;
if(conf->accelerated) {
visualConfigs[i].visualRating = GLX_NONE;
} else {
visualConfigs[i].visualRating = GLX_SLOW_VISUAL_EXT;
}
visualConfigs[i].transparentPixel = GLX_NONE;
visualConfigs[i].transparentRed = GLX_NONE;
visualConfigs[i].transparentGreen = GLX_NONE;
visualConfigs[i].transparentBlue = GLX_NONE;
visualConfigs[i].transparentAlpha = GLX_NONE;
visualConfigs[i].transparentIndex = GLX_NONE;
if(msample > 0) {
visualConfigs[i].multiSampleSize = conf->multisample_samples;
visualConfigs[i].nMultiSampleBuffers = conf->multisample_buffers;
} else {
visualConfigs[i].multiSampleSize = 0;
visualConfigs[i].nMultiSampleBuffers = 0;
}
++i;
}
}
}
}
}
}
}
}
}
if (i != numConfigs) {
ErrorF("numConfigs calculation error in setVisualConfigs! numConfigs is %d i is %d\n", numConfigs, i);
abort();
}
freeGlCapabilities(&caps);
GlxSetVisualConfigs(numConfigs, visualConfigs, visualPrivates);
}
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