1 /*
2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice including the dates of first publication and
13 * either this permission notice or a reference to
14 * http://oss.sgi.com/projects/FreeB/
15 * shall be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Except as contained in this notice, the name of Silicon Graphics, Inc.
26 * shall not be used in advertising or otherwise to promote the sale, use or
27 * other dealings in this Software without prior written authorization from
28 * Silicon Graphics, Inc.
29 */
30
31 #ifdef HAVE_DIX_CONFIG_H
32 #include <dix-config.h>
33 #endif
34
35 #include <GL/glxtokens.h>
36 #include <string.h>
37 #include <windowstr.h>
38 #include <os.h>
39 #include <colormapst.h>
40
41 #include "extinit.h"
42 #include "privates.h"
43 #include "glxserver.h"
44 #include "glxutil.h"
45 #include "glxext.h"
46 #include "protocol-versions.h"
47
48 #ifdef COMPOSITE
49 #include "compositeext.h"
50 #endif
51
52 static DevPrivateKeyRec glxScreenPrivateKeyRec;
53
54 #define glxScreenPrivateKey (&glxScreenPrivateKeyRec)
55
56 const char GLServerVersion[] = "1.4";
57 static const char GLServerExtensions[] =
58 "GL_ARB_depth_texture "
59 "GL_ARB_draw_buffers "
60 "GL_ARB_fragment_program "
61 "GL_ARB_fragment_program_shadow "
62 "GL_ARB_imaging "
63 "GL_ARB_multisample "
64 "GL_ARB_multitexture "
65 "GL_ARB_occlusion_query "
66 "GL_ARB_point_parameters "
67 "GL_ARB_point_sprite "
68 "GL_ARB_shadow "
69 "GL_ARB_shadow_ambient "
70 "GL_ARB_texture_border_clamp "
71 "GL_ARB_texture_compression "
72 "GL_ARB_texture_cube_map "
73 "GL_ARB_texture_env_add "
74 "GL_ARB_texture_env_combine "
75 "GL_ARB_texture_env_crossbar "
76 "GL_ARB_texture_env_dot3 "
77 "GL_ARB_texture_mirrored_repeat "
78 "GL_ARB_texture_non_power_of_two "
79 "GL_ARB_transpose_matrix "
80 "GL_ARB_vertex_program "
81 "GL_ARB_window_pos "
82 "GL_EXT_abgr "
83 "GL_EXT_bgra "
84 "GL_EXT_blend_color "
85 "GL_EXT_blend_equation_separate "
86 "GL_EXT_blend_func_separate "
87 "GL_EXT_blend_logic_op "
88 "GL_EXT_blend_minmax "
89 "GL_EXT_blend_subtract "
90 "GL_EXT_clip_volume_hint "
91 "GL_EXT_copy_texture "
92 "GL_EXT_draw_range_elements "
93 "GL_EXT_fog_coord "
94 "GL_EXT_framebuffer_object "
95 "GL_EXT_multi_draw_arrays "
96 "GL_EXT_packed_pixels "
97 "GL_EXT_paletted_texture "
98 "GL_EXT_point_parameters "
99 "GL_EXT_polygon_offset "
100 "GL_EXT_rescale_normal "
101 "GL_EXT_secondary_color "
102 "GL_EXT_separate_specular_color "
103 "GL_EXT_shadow_funcs "
104 "GL_EXT_shared_texture_palette "
105 "GL_EXT_stencil_two_side "
106 "GL_EXT_stencil_wrap "
107 "GL_EXT_subtexture "
108 "GL_EXT_texture "
109 "GL_EXT_texture3D "
110 "GL_EXT_texture_compression_dxt1 "
111 "GL_EXT_texture_compression_s3tc "
112 "GL_EXT_texture_edge_clamp "
113 "GL_EXT_texture_env_add "
114 "GL_EXT_texture_env_combine "
115 "GL_EXT_texture_env_dot3 "
116 "GL_EXT_texture_filter_anisotropic "
117 "GL_EXT_texture_lod "
118 "GL_EXT_texture_lod_bias "
119 "GL_EXT_texture_mirror_clamp "
120 "GL_EXT_texture_object "
121 "GL_EXT_texture_rectangle "
122 "GL_EXT_vertex_array "
123 "GL_3DFX_texture_compression_FXT1 "
124 "GL_APPLE_packed_pixels "
125 "GL_ATI_draw_buffers "
126 "GL_ATI_texture_env_combine3 "
127 "GL_ATI_texture_mirror_once "
128 "GL_HP_occlusion_test "
129 "GL_IBM_texture_mirrored_repeat "
130 "GL_INGR_blend_func_separate "
131 "GL_MESA_pack_invert "
132 "GL_MESA_ycbcr_texture "
133 "GL_NV_blend_square "
134 "GL_NV_depth_clamp "
135 "GL_NV_fog_distance "
136 "GL_NV_fragment_program_option "
137 "GL_NV_fragment_program2 "
138 "GL_NV_light_max_exponent "
139 "GL_NV_multisample_filter_hint "
140 "GL_NV_point_sprite "
141 "GL_NV_texgen_reflection "
142 "GL_NV_texture_compression_vtc "
143 "GL_NV_texture_env_combine4 "
144 "GL_NV_texture_expand_normal "
145 "GL_NV_texture_rectangle "
146 "GL_NV_vertex_program2_option "
147 "GL_NV_vertex_program3 "
148 "GL_OES_compressed_paletted_texture "
149 "GL_SGI_color_matrix "
150 "GL_SGI_color_table "
151 "GL_SGIS_generate_mipmap "
152 "GL_SGIS_multisample "
153 "GL_SGIS_point_parameters "
154 "GL_SGIS_texture_border_clamp "
155 "GL_SGIS_texture_edge_clamp "
156 "GL_SGIS_texture_lod "
157 "GL_SGIX_depth_texture "
158 "GL_SGIX_shadow "
159 "GL_SGIX_shadow_ambient "
160 "GL_SUN_slice_accum ";
161
162 static Bool
glxCloseScreen(ScreenPtr pScreen)163 glxCloseScreen(ScreenPtr pScreen)
164 {
165 __GLXscreen *pGlxScreen = glxGetScreen(pScreen);
166
167 pScreen->CloseScreen = pGlxScreen->CloseScreen;
168
169 pGlxScreen->destroy(pGlxScreen);
170
171 return pScreen->CloseScreen(pScreen);
172 }
173
174 __GLXscreen *
glxGetScreen(ScreenPtr pScreen)175 glxGetScreen(ScreenPtr pScreen)
176 {
177 return dixLookupPrivate(&pScreen->devPrivates, glxScreenPrivateKey);
178 }
179
180 GLint
glxConvertToXVisualType(int visualType)181 glxConvertToXVisualType(int visualType)
182 {
183 static const int x_visual_types[] = {
184 TrueColor, DirectColor,
185 PseudoColor, StaticColor,
186 GrayScale, StaticGray
187 };
188
189 return ((unsigned) (visualType - GLX_TRUE_COLOR) < 6)
190 ? x_visual_types[visualType - GLX_TRUE_COLOR] : -1;
191 }
192
193 /* This code inspired by composite/compinit.c. We could move this to
194 * mi/ and share it with composite.*/
195
196 static VisualPtr
AddScreenVisuals(ScreenPtr pScreen,int count,int d)197 AddScreenVisuals(ScreenPtr pScreen, int count, int d)
198 {
199 int i;
200 DepthPtr depth;
201
202 depth = NULL;
203 for (i = 0; i < pScreen->numDepths; i++) {
204 if (pScreen->allowedDepths[i].depth == d) {
205 depth = &pScreen->allowedDepths[i];
206 break;
207 }
208 }
209 if (depth == NULL)
210 return NULL;
211
212 if (ResizeVisualArray(pScreen, count, depth) == FALSE)
213 return NULL;
214
215 /* Return a pointer to the first of the added visuals. */
216 return pScreen->visuals + pScreen->numVisuals - count;
217 }
218
219 static int
findFirstSet(unsigned int v)220 findFirstSet(unsigned int v)
221 {
222 int i;
223
224 for (i = 0; i < 32; i++)
225 if (v & (1 << i))
226 return i;
227
228 return -1;
229 }
230
231 static void
initGlxVisual(VisualPtr visual,__GLXconfig * config)232 initGlxVisual(VisualPtr visual, __GLXconfig * config)
233 {
234 int maxBits;
235
236 maxBits = max(config->redBits, max(config->greenBits, config->blueBits));
237
238 config->visualID = visual->vid;
239 visual->class = glxConvertToXVisualType(config->visualType);
240 visual->bitsPerRGBValue = maxBits;
241 visual->ColormapEntries = 1 << maxBits;
242 visual->nplanes = config->redBits + config->greenBits + config->blueBits;
243
244 visual->redMask = config->redMask;
245 visual->greenMask = config->greenMask;
246 visual->blueMask = config->blueMask;
247 visual->offsetRed = findFirstSet(config->redMask);
248 visual->offsetGreen = findFirstSet(config->greenMask);
249 visual->offsetBlue = findFirstSet(config->blueMask);
250 }
251
252 static __GLXconfig *
pickFBConfig(__GLXscreen * pGlxScreen,VisualPtr visual)253 pickFBConfig(__GLXscreen * pGlxScreen, VisualPtr visual)
254 {
255 __GLXconfig *best = NULL, *config;
256 int best_score = 0;
257
258 for (config = pGlxScreen->fbconfigs; config != NULL; config = config->next) {
259 int score = 0;
260
261 if (config->redMask != visual->redMask ||
262 config->greenMask != visual->greenMask ||
263 config->blueMask != visual->blueMask)
264 continue;
265 if (config->visualRating != GLX_NONE)
266 continue;
267 /* Ignore multisampled configs */
268 if (config->sampleBuffers)
269 continue;
270 if (glxConvertToXVisualType(config->visualType) != visual->class)
271 continue;
272 /* If it's the 32-bit RGBA visual, demand a 32-bit fbconfig. */
273 if (visual->nplanes == 32 && config->rgbBits != 32)
274 continue;
275 /* If it's the 32-bit RGBA visual, do not pick sRGB capable config.
276 * This can cause issues with compositors that are not sRGB aware.
277 */
278 if (visual->nplanes == 32 && config->sRGBCapable == GL_TRUE)
279 continue;
280 /* Can't use the same FBconfig for multiple X visuals. I think. */
281 if (config->visualID != 0)
282 continue;
283 #ifdef COMPOSITE
284 if (!noCompositeExtension) {
285 /* Use only duplicated configs for compIsAlternateVisuals */
286 if (!!compIsAlternateVisual(pGlxScreen->pScreen, visual->vid) !=
287 !!config->duplicatedForComp)
288 continue;
289 }
290 #endif
291 /*
292 * If possible, use the same swapmethod for all built-in visual
293 * fbconfigs, to avoid getting the 32-bit composite visual when
294 * requesting, for example, a SWAP_COPY fbconfig.
295 */
296 if (config->swapMethod == GLX_SWAP_UNDEFINED_OML)
297 score += 32;
298 if (config->swapMethod == GLX_SWAP_EXCHANGE_OML)
299 score += 16;
300 if (config->doubleBufferMode > 0)
301 score += 8;
302 if (config->depthBits > 0)
303 score += 4;
304 if (config->stencilBits > 0)
305 score += 2;
306 if (config->alphaBits > 0)
307 score++;
308
309 if (score > best_score) {
310 best = config;
311 best_score = score;
312 }
313 }
314
315 return best;
316 }
317
318 void
__glXScreenInit(__GLXscreen * pGlxScreen,ScreenPtr pScreen)319 __glXScreenInit(__GLXscreen * pGlxScreen, ScreenPtr pScreen)
320 {
321 __GLXconfig *m;
322 __GLXconfig *config;
323 int i;
324
325 if (!dixRegisterPrivateKey(&glxScreenPrivateKeyRec, PRIVATE_SCREEN, 0))
326 return;
327
328 pGlxScreen->pScreen = pScreen;
329 pGlxScreen->GLextensions = strdup(GLServerExtensions);
330 pGlxScreen->GLXextensions = NULL;
331
332 pGlxScreen->CloseScreen = pScreen->CloseScreen;
333 pScreen->CloseScreen = glxCloseScreen;
334
335 i = 0;
336 for (m = pGlxScreen->fbconfigs; m != NULL; m = m->next) {
337 m->fbconfigID = FakeClientID(0);
338 m->visualID = 0;
339 i++;
340 }
341 pGlxScreen->numFBConfigs = i;
342
343 pGlxScreen->visuals =
344 calloc(pGlxScreen->numFBConfigs, sizeof(__GLXconfig *));
345
346 /* First, try to choose featureful FBconfigs for the existing X visuals.
347 * Note that if multiple X visuals end up with the same FBconfig being
348 * chosen, the later X visuals don't get GLX visuals (because we want to
349 * prioritize the root visual being GLX).
350 */
351 for (i = 0; i < pScreen->numVisuals; i++) {
352 VisualPtr visual = &pScreen->visuals[i];
353
354 config = pickFBConfig(pGlxScreen, visual);
355 if (config) {
356 pGlxScreen->visuals[pGlxScreen->numVisuals++] = config;
357 config->visualID = visual->vid;
358 #ifdef COMPOSITE
359 if (!noCompositeExtension) {
360 if (compIsAlternateVisual(pScreen, visual->vid))
361 config->visualSelectGroup++;
362 }
363 #endif
364 }
365 }
366
367 /* Then, add new visuals corresponding to all FBconfigs that didn't have
368 * an existing, appropriate visual.
369 */
370 for (config = pGlxScreen->fbconfigs; config != NULL; config = config->next) {
371 int depth;
372
373 VisualPtr visual;
374
375 if (config->visualID != 0)
376 continue;
377
378 /* Only count RGB bits and not alpha, as we're not trying to create
379 * visuals for compositing (that's what the 32-bit composite visual
380 * set up above is for.
381 */
382 depth = config->redBits + config->greenBits + config->blueBits;
383 #ifdef COMPOSITE
384 if (!noCompositeExtension) {
385 if (config->duplicatedForComp) {
386 depth += config->alphaBits;
387 config->visualSelectGroup++;
388 }
389 }
390 #endif
391 /* Make sure that our FBconfig's depth can actually be displayed
392 * (corresponds to an existing visual).
393 */
394 for (i = 0; i < pScreen->numVisuals; i++) {
395 if (depth == pScreen->visuals[i].nplanes)
396 break;
397 }
398 /* if it can't, fix up the fbconfig to not advertise window support */
399 if (i == pScreen->numVisuals)
400 config->drawableType &= ~(GLX_WINDOW_BIT);
401
402 /* fbconfig must support window drawables */
403 if (!(config->drawableType & GLX_WINDOW_BIT)) {
404 config->visualID = 0;
405 continue;
406 }
407
408 /* Create a new X visual for our FBconfig. */
409 visual = AddScreenVisuals(pScreen, 1, depth);
410 if (visual == NULL)
411 continue;
412
413 #ifdef COMPOSITE
414 if (!noCompositeExtension) {
415 if (config->duplicatedForComp)
416 (void) CompositeRegisterAlternateVisuals(pScreen, &visual->vid, 1);
417 }
418 #endif
419 pGlxScreen->visuals[pGlxScreen->numVisuals++] = config;
420 initGlxVisual(visual, config);
421 }
422
423 dixSetPrivate(&pScreen->devPrivates, glxScreenPrivateKey, pGlxScreen);
424
425 if (pGlxScreen->glvnd)
426 __glXEnableExtension(pGlxScreen->glx_enable_bits, "GLX_EXT_libglvnd");
427
428 i = __glXGetExtensionString(pGlxScreen->glx_enable_bits, NULL);
429 if (i > 0) {
430 pGlxScreen->GLXextensions = xnfalloc(i);
431 (void) __glXGetExtensionString(pGlxScreen->glx_enable_bits,
432 pGlxScreen->GLXextensions);
433 }
434
435 }
436
437 void
__glXScreenDestroy(__GLXscreen * screen)438 __glXScreenDestroy(__GLXscreen * screen)
439 {
440 __GLXconfig *config, *next;
441
442 free(screen->glvnd);
443 free(screen->GLXextensions);
444 free(screen->GLextensions);
445 free(screen->visuals);
446
447 for (config = screen->fbconfigs; config != NULL; config = next) {
448 next = config->next;
449 free(config);
450 }
451 }
452