visualConfigs.c revision 4642e01f 
1/*
2 * Copyright (c) 2007, 2008 Apple Inc.
3 * Copyright (c) 2004 Torrey T. Lyons. All Rights Reserved.
4 * Copyright (c) 2002 Greg Parker. All Rights Reserved.
5 *
6 * Portions of this file are copied from Mesa's xf86glx.c,
7 * which contains the following copyright:
8 *
9 * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
10 * All Rights Reserved.
11 *
12 * Permission is hereby granted, free of charge, to any person obtaining a
13 * copy of this software and associated documentation files (the "Software"),
14 * to deal in the Software without restriction, including without limitation
15 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
16 * and/or sell copies of the Software, and to permit persons to whom the
17 * Software is furnished to do so, subject to the following conditions:
18 *
19 * The above copyright notice and this permission notice shall be included in
20 * all copies or substantial portions of the Software.
21 *
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 * THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
26 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
27 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28 * DEALINGS IN THE SOFTWARE.
29 */
30
31#ifdef HAVE_DIX_CONFIG_H
32#include <dix-config.h>
33#endif
34
35#include "dri.h"
36
37#include <OpenGL/OpenGL.h>
38#include <OpenGL/CGLContext.h>
39
40#include <GL/gl.h>
41#include <GL/glxproto.h>
42#include <windowstr.h>
43#include <resource.h>
44#include <GL/glxint.h>
45#include <GL/glxtokens.h>
46#include <scrnintstr.h>
47#include <glxserver.h>
48#include <glxscreens.h>
49#include <glxdrawable.h>
50#include <glxcontext.h>
51#include <glxext.h>
52#include <glxutil.h>
53#include <glxscreens.h>
54#include <GL/internal/glcore.h>
55
56#include "capabilities.h"
57#include "visualConfigs.h"
58
59/* Based originally on code from indirect.c which was based on code from i830_dri.c. */
60void setVisualConfigs(void) {
61    int numConfigs = 0;
62    __GLXvisualConfig *visualConfigs = NULL;
63    void **visualPrivates = NULL;
64    struct glCapabilities caps;
65    struct glCapabilitiesConfig *conf = NULL;
66    int stereo, depth, aux, buffers, stencil, accum, color, msample;
67    int i = 0;
68
69    if(getGlCapabilities(&caps)) {
70	ErrorF("error from getGlCapabilities()!\n");
71	return;
72    }
73
74    /*
75      conf->stereo is 0 or 1, but we need at least 1 iteration of the loop,
76      so we treat a true conf->stereo as 2.
77
78      The depth size is 0 or 24.  Thus we do 2 iterations for that.
79
80      conf->aux_buffers (when available/non-zero) result in 2 iterations instead of 1.
81
82      conf->buffers indicates whether we have single or double buffering.
83
84      conf->total_stencil_bit_depths
85
86      conf->total_color_buffers indicates the RGB/RGBA color depths.
87
88      conf->total_accum_buffers iterations for accum (with at least 1 if equal to 0)
89
90      conf->total_depth_buffer_depths
91
92      conf->multisample_buffers iterations (with at least 1 if equal to 0).  We add 1
93      for the 0 multisampling config.
94
95     */
96
97    assert(NULL != caps.configurations);
98    conf = caps.configurations;
99
100    numConfigs = 0;
101
102    for(conf = caps.configurations; conf; conf = conf->next) {
103	if(conf->total_color_buffers <= 0)
104	    continue;
105
106	numConfigs += (conf->stereo ? 2 : 1)
107	    * (conf->aux_buffers ? 2 : 1)
108	    * conf->buffers
109	    * ((conf->total_stencil_bit_depths > 0) ? conf->total_stencil_bit_depths : 1)
110	    * conf->total_color_buffers
111	    * ((conf->total_accum_buffers > 0) ? conf->total_accum_buffers : 1)
112	    * conf->total_depth_buffer_depths
113	    * (conf->multisample_buffers + 1);
114    }
115
116    visualConfigs = xcalloc(sizeof(*visualConfigs), numConfigs);
117
118    if(NULL == visualConfigs) {
119	ErrorF("xcalloc failure when allocating visualConfigs\n");
120	freeGlCapabilities(&caps);
121	return;
122    }
123
124    visualPrivates = xcalloc(sizeof(void *), numConfigs);
125
126    if(NULL == visualPrivates) {
127	ErrorF("xcalloc failure when allocating visualPrivates");
128	freeGlCapabilities(&caps);
129	xfree(visualConfigs);
130	return;
131    }
132
133    i = 0; /* current buffer */
134    for(conf = caps.configurations; conf; conf = conf->next) {
135	for(stereo = 0; stereo < (conf->stereo ? 2 : 1); ++stereo) {
136	    for(aux = 0; aux < (conf->aux_buffers ? 2 : 1); ++aux) {
137		for(buffers = 0; buffers < conf->buffers; ++buffers) {
138		    for(stencil = 0; stencil < ((conf->total_stencil_bit_depths > 0) ?
139						conf->total_stencil_bit_depths : 1); ++stencil) {
140			for(color = 0; color < conf->total_color_buffers; ++color) {
141			    for(accum = 0; accum < ((conf->total_accum_buffers > 0) ?
142						    conf->total_accum_buffers : 1); ++accum) {
143				for(depth = 0; depth < conf->total_depth_buffer_depths; ++depth) {
144				    for(msample = 0; msample < (conf->multisample_buffers + 1); ++msample) {
145					visualConfigs[i].vid = (VisualID)(-1);
146					visualConfigs[i].class = TrueColor;
147
148					visualConfigs[i].rgba = true;
149					visualConfigs[i].redSize = conf->color_buffers[color].r;
150					visualConfigs[i].greenSize = conf->color_buffers[color].g;
151					visualConfigs[i].blueSize = conf->color_buffers[color].b;
152
153					if(GLCAPS_COLOR_BUF_INVALID_VALUE == conf->color_buffers[color].a) {
154					    /* This visual has no alpha. */
155					    visualConfigs[i].alphaSize = 0;
156					} else {
157					    visualConfigs[i].alphaSize = conf->color_buffers[color].a;
158					}
159
160					/*
161					 * If the .a/alpha value is unset, then don't add it to the
162					 * bufferSize specification.  The INVALID_VALUE indicates that it
163					 * was unset.
164					 *
165					 * This prevents odd bufferSizes, such as 14.
166					 */
167					if(GLCAPS_COLOR_BUF_INVALID_VALUE == conf->color_buffers[color].a) {
168					    visualConfigs[i].bufferSize = conf->color_buffers[color].r +
169						conf->color_buffers[color].g + conf->color_buffers[color].b;
170					} else {
171					    visualConfigs[i].bufferSize = conf->color_buffers[color].r +
172						conf->color_buffers[color].g + conf->color_buffers[color].b +
173						conf->color_buffers[color].a;
174					}
175
176					/*
177					 * I'm uncertain about these masks.
178					 * I don't think we actually care what the values are in our
179					 * libGL, so it doesn't seem to make a difference.
180					 */
181					visualConfigs[i].redMask = -1;
182					visualConfigs[i].greenMask = -1;
183					visualConfigs[i].blueMask = -1;
184					visualConfigs[i].alphaMask = -1;
185
186					if(conf->total_accum_buffers > 0) {
187					    visualConfigs[i].accumRedSize = conf->accum_buffers[accum].r;
188					    visualConfigs[i].accumGreenSize = conf->accum_buffers[accum].g;
189					    visualConfigs[i].accumBlueSize = conf->accum_buffers[accum].b;
190					    if(GLCAPS_COLOR_BUF_INVALID_VALUE != conf->accum_buffers[accum].a) {
191						visualConfigs[i].accumAlphaSize = conf->accum_buffers[accum].a;
192					    } else {
193						visualConfigs[i].accumAlphaSize = 0;
194					    }
195					} else {
196					    visualConfigs[i].accumRedSize = 0;
197					    visualConfigs[i].accumGreenSize = 0;
198					    visualConfigs[i].accumBlueSize = 0;
199					    visualConfigs[i].accumAlphaSize = 0;
200					}
201
202					visualConfigs[i].doubleBuffer = buffers ? TRUE : FALSE;
203					visualConfigs[i].stereo = stereo ? TRUE : FALSE;
204
205  					visualConfigs[i].depthSize = conf->depth_buffers[depth];
206
207					if(conf->total_stencil_bit_depths > 0) {
208					    visualConfigs[i].stencilSize = conf->stencil_bit_depths[stencil];
209					} else {
210					    visualConfigs[i].stencilSize = 0;
211					}
212					visualConfigs[i].auxBuffers = aux ? conf->aux_buffers : 0;
213					visualConfigs[i].level = 0;
214
215					if(conf->accelerated) {
216					    visualConfigs[i].visualRating = GLX_NONE;
217					} else {
218					    visualConfigs[i].visualRating = GLX_SLOW_VISUAL_EXT;
219					}
220
221					visualConfigs[i].transparentPixel = GLX_NONE;
222					visualConfigs[i].transparentRed = GLX_NONE;
223					visualConfigs[i].transparentGreen = GLX_NONE;
224					visualConfigs[i].transparentBlue = GLX_NONE;
225					visualConfigs[i].transparentAlpha = GLX_NONE;
226					visualConfigs[i].transparentIndex = GLX_NONE;
227
228					if(msample > 0) {
229					    visualConfigs[i].multiSampleSize = conf->multisample_samples;
230					    visualConfigs[i].nMultiSampleBuffers = conf->multisample_buffers;
231					} else {
232					    visualConfigs[i].multiSampleSize = 0;
233					    visualConfigs[i].nMultiSampleBuffers = 0;
234					}
235
236					++i;
237				    }
238				}
239			    }
240			}
241		    }
242		}
243	    }
244	}
245    }
246
247    if (i != numConfigs) {
248	ErrorF("numConfigs calculation error in setVisualConfigs!  numConfigs is %d  i is %d\n", numConfigs, i);
249	abort();
250    }
251
252    freeGlCapabilities(&caps);
253
254    GlxSetVisualConfigs(numConfigs, visualConfigs, visualPrivates);
255}
256