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a09e091a JB |
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 "privates.h" | |
42 | #include "glxserver.h" | |
43 | #include "glxutil.h" | |
44 | #include "glxext.h" | |
45 | #include "protocol-versions.h" | |
46 | ||
47 | static DevPrivateKeyRec glxScreenPrivateKeyRec; | |
48 | ||
49 | #define glxScreenPrivateKey (&glxScreenPrivateKeyRec) | |
50 | ||
51 | const char GLServerVersion[] = "1.4"; | |
52 | static const char GLServerExtensions[] = | |
53 | "GL_ARB_depth_texture " | |
54 | "GL_ARB_draw_buffers " | |
55 | "GL_ARB_fragment_program " | |
56 | "GL_ARB_fragment_program_shadow " | |
57 | "GL_ARB_imaging " | |
58 | "GL_ARB_multisample " | |
59 | "GL_ARB_multitexture " | |
60 | "GL_ARB_occlusion_query " | |
61 | "GL_ARB_point_parameters " | |
62 | "GL_ARB_point_sprite " | |
63 | "GL_ARB_shadow " | |
64 | "GL_ARB_shadow_ambient " | |
65 | "GL_ARB_texture_border_clamp " | |
66 | "GL_ARB_texture_compression " | |
67 | "GL_ARB_texture_cube_map " | |
68 | "GL_ARB_texture_env_add " | |
69 | "GL_ARB_texture_env_combine " | |
70 | "GL_ARB_texture_env_crossbar " | |
71 | "GL_ARB_texture_env_dot3 " | |
72 | "GL_ARB_texture_mirrored_repeat " | |
73 | "GL_ARB_texture_non_power_of_two " | |
74 | "GL_ARB_transpose_matrix " | |
75 | "GL_ARB_vertex_program " | |
76 | "GL_ARB_window_pos " | |
77 | "GL_EXT_abgr " | |
78 | "GL_EXT_bgra " | |
79 | "GL_EXT_blend_color " | |
80 | "GL_EXT_blend_equation_separate " | |
81 | "GL_EXT_blend_func_separate " | |
82 | "GL_EXT_blend_logic_op " | |
83 | "GL_EXT_blend_minmax " | |
84 | "GL_EXT_blend_subtract " | |
85 | "GL_EXT_clip_volume_hint " | |
86 | "GL_EXT_copy_texture " | |
87 | "GL_EXT_draw_range_elements " | |
88 | "GL_EXT_fog_coord " | |
89 | "GL_EXT_framebuffer_object " | |
90 | "GL_EXT_multi_draw_arrays " | |
91 | "GL_EXT_packed_pixels " | |
92 | "GL_EXT_paletted_texture " | |
93 | "GL_EXT_point_parameters " | |
94 | "GL_EXT_polygon_offset " | |
95 | "GL_EXT_rescale_normal " | |
96 | "GL_EXT_secondary_color " | |
97 | "GL_EXT_separate_specular_color " | |
98 | "GL_EXT_shadow_funcs " | |
99 | "GL_EXT_shared_texture_palette " | |
100 | "GL_EXT_stencil_two_side " | |
101 | "GL_EXT_stencil_wrap " | |
102 | "GL_EXT_subtexture " | |
103 | "GL_EXT_texture " | |
104 | "GL_EXT_texture3D " | |
105 | "GL_EXT_texture_compression_dxt1 " | |
106 | "GL_EXT_texture_compression_s3tc " | |
107 | "GL_EXT_texture_edge_clamp " | |
108 | "GL_EXT_texture_env_add " | |
109 | "GL_EXT_texture_env_combine " | |
110 | "GL_EXT_texture_env_dot3 " | |
111 | "GL_EXT_texture_filter_anisotropic " | |
112 | "GL_EXT_texture_lod " | |
113 | "GL_EXT_texture_lod_bias " | |
114 | "GL_EXT_texture_mirror_clamp " | |
115 | "GL_EXT_texture_object " | |
116 | "GL_EXT_texture_rectangle " | |
117 | "GL_EXT_vertex_array " | |
118 | "GL_3DFX_texture_compression_FXT1 " | |
119 | "GL_APPLE_packed_pixels " | |
120 | "GL_ATI_draw_buffers " | |
121 | "GL_ATI_texture_env_combine3 " | |
122 | "GL_ATI_texture_mirror_once " | |
123 | "GL_HP_occlusion_test " | |
124 | "GL_IBM_texture_mirrored_repeat " | |
125 | "GL_INGR_blend_func_separate " | |
126 | "GL_MESA_pack_invert " | |
127 | "GL_MESA_ycbcr_texture " | |
128 | "GL_NV_blend_square " | |
129 | "GL_NV_depth_clamp " | |
130 | "GL_NV_fog_distance " | |
131 | "GL_NV_fragment_program_option " | |
132 | "GL_NV_fragment_program2 " | |
133 | "GL_NV_light_max_exponent " | |
134 | "GL_NV_multisample_filter_hint " | |
135 | "GL_NV_point_sprite " | |
136 | "GL_NV_texgen_reflection " | |
137 | "GL_NV_texture_compression_vtc " | |
138 | "GL_NV_texture_env_combine4 " | |
139 | "GL_NV_texture_expand_normal " | |
140 | "GL_NV_texture_rectangle " | |
141 | "GL_NV_vertex_program2_option " | |
142 | "GL_NV_vertex_program3 " | |
143 | "GL_OES_compressed_paletted_texture " | |
144 | "GL_SGI_color_matrix " | |
145 | "GL_SGI_color_table " | |
146 | "GL_SGIS_generate_mipmap " | |
147 | "GL_SGIS_multisample " | |
148 | "GL_SGIS_point_parameters " | |
149 | "GL_SGIS_texture_border_clamp " | |
150 | "GL_SGIS_texture_edge_clamp " | |
151 | "GL_SGIS_texture_lod " | |
152 | "GL_SGIX_depth_texture " | |
153 | "GL_SGIX_shadow " | |
154 | "GL_SGIX_shadow_ambient " | |
155 | "GL_SUN_slice_accum "; | |
156 | ||
157 | /* | |
158 | ** We have made the simplifying assuption that the same extensions are | |
159 | ** supported across all screens in a multi-screen system. | |
160 | */ | |
161 | unsigned glxMajorVersion = SERVER_GLX_MAJOR_VERSION; | |
162 | unsigned glxMinorVersion = SERVER_GLX_MINOR_VERSION; | |
163 | static char GLXServerExtensions[] = | |
164 | "GLX_ARB_multisample " | |
165 | "GLX_EXT_visual_info " | |
166 | "GLX_EXT_visual_rating " | |
167 | "GLX_EXT_import_context " | |
168 | "GLX_EXT_texture_from_pixmap " | |
169 | "GLX_OML_swap_method " | |
170 | "GLX_SGI_make_current_read " | |
171 | #ifndef __APPLE__ | |
172 | "GLX_SGIS_multisample " | |
173 | #endif | |
174 | "GLX_SGIX_fbconfig " | |
175 | "GLX_SGIX_pbuffer " | |
176 | "GLX_MESA_copy_sub_buffer "; | |
177 | ||
178 | static Bool | |
179 | glxCloseScreen(ScreenPtr pScreen) | |
180 | { | |
181 | __GLXscreen *pGlxScreen = glxGetScreen(pScreen); | |
182 | ||
183 | pScreen->CloseScreen = pGlxScreen->CloseScreen; | |
184 | ||
185 | pGlxScreen->destroy(pGlxScreen); | |
186 | ||
187 | return pScreen->CloseScreen(pScreen); | |
188 | } | |
189 | ||
190 | __GLXscreen * | |
191 | glxGetScreen(ScreenPtr pScreen) | |
192 | { | |
193 | return dixLookupPrivate(&pScreen->devPrivates, glxScreenPrivateKey); | |
194 | } | |
195 | ||
196 | _X_EXPORT void | |
197 | GlxSetVisualConfigs(int nconfigs, void *configs, void **privates) | |
198 | { | |
199 | /* We keep this stub around for the DDX drivers that still | |
200 | * call it. */ | |
201 | } | |
202 | ||
203 | GLint | |
204 | glxConvertToXVisualType(int visualType) | |
205 | { | |
206 | static const int x_visual_types[] = { | |
207 | TrueColor, DirectColor, | |
208 | PseudoColor, StaticColor, | |
209 | GrayScale, StaticGray | |
210 | }; | |
211 | ||
212 | return ((unsigned) (visualType - GLX_TRUE_COLOR) < 6) | |
213 | ? x_visual_types[visualType - GLX_TRUE_COLOR] : -1; | |
214 | } | |
215 | ||
216 | /* This code inspired by composite/compinit.c. We could move this to | |
217 | * mi/ and share it with composite.*/ | |
218 | ||
219 | static VisualPtr | |
220 | AddScreenVisuals(ScreenPtr pScreen, int count, int d) | |
221 | { | |
222 | int i; | |
223 | DepthPtr depth; | |
224 | ||
225 | depth = NULL; | |
226 | for (i = 0; i < pScreen->numDepths; i++) { | |
227 | if (pScreen->allowedDepths[i].depth == d) { | |
228 | depth = &pScreen->allowedDepths[i]; | |
229 | break; | |
230 | } | |
231 | } | |
232 | if (depth == NULL) | |
233 | return NULL; | |
234 | ||
235 | if (ResizeVisualArray(pScreen, count, depth) == FALSE) | |
236 | return NULL; | |
237 | ||
238 | /* Return a pointer to the first of the added visuals. */ | |
239 | return pScreen->visuals + pScreen->numVisuals - count; | |
240 | } | |
241 | ||
242 | static int | |
243 | findFirstSet(unsigned int v) | |
244 | { | |
245 | int i; | |
246 | ||
247 | for (i = 0; i < 32; i++) | |
248 | if (v & (1 << i)) | |
249 | return i; | |
250 | ||
251 | return -1; | |
252 | } | |
253 | ||
254 | static void | |
255 | initGlxVisual(VisualPtr visual, __GLXconfig * config) | |
256 | { | |
257 | int maxBits; | |
258 | ||
259 | maxBits = max(config->redBits, max(config->greenBits, config->blueBits)); | |
260 | ||
261 | config->visualID = visual->vid; | |
262 | visual->class = glxConvertToXVisualType(config->visualType); | |
263 | visual->bitsPerRGBValue = maxBits; | |
264 | visual->ColormapEntries = 1 << maxBits; | |
265 | visual->nplanes = config->redBits + config->greenBits + config->blueBits; | |
266 | ||
267 | visual->redMask = config->redMask; | |
268 | visual->greenMask = config->greenMask; | |
269 | visual->blueMask = config->blueMask; | |
270 | visual->offsetRed = findFirstSet(config->redMask); | |
271 | visual->offsetGreen = findFirstSet(config->greenMask); | |
272 | visual->offsetBlue = findFirstSet(config->blueMask); | |
273 | } | |
274 | ||
275 | static __GLXconfig * | |
276 | pickFBConfig(__GLXscreen * pGlxScreen, VisualPtr visual) | |
277 | { | |
278 | __GLXconfig *best = NULL, *config; | |
279 | int best_score = 0; | |
280 | ||
281 | for (config = pGlxScreen->fbconfigs; config != NULL; config = config->next) { | |
282 | int score = 0; | |
283 | ||
284 | if (config->redMask != visual->redMask || | |
285 | config->greenMask != visual->greenMask || | |
286 | config->blueMask != visual->blueMask) | |
287 | continue; | |
288 | if (config->visualRating != GLX_NONE) | |
289 | continue; | |
290 | /* Ignore multisampled configs */ | |
291 | if (config->sampleBuffers) | |
292 | continue; | |
293 | if (glxConvertToXVisualType(config->visualType) != visual->class) | |
294 | continue; | |
295 | /* If it's the 32-bit RGBA visual, demand a 32-bit fbconfig. */ | |
296 | if (visual->nplanes == 32 && config->rgbBits != 32) | |
297 | continue; | |
298 | /* Can't use the same FBconfig for multiple X visuals. I think. */ | |
299 | if (config->visualID != 0) | |
300 | continue; | |
301 | ||
302 | if (config->doubleBufferMode > 0) | |
303 | score += 8; | |
304 | if (config->depthBits > 0) | |
305 | score += 4; | |
306 | if (config->stencilBits > 0) | |
307 | score += 2; | |
308 | if (config->alphaBits > 0) | |
309 | score++; | |
310 | ||
311 | if (score > best_score) { | |
312 | best = config; | |
313 | best_score = score; | |
314 | } | |
315 | } | |
316 | ||
317 | return best; | |
318 | } | |
319 | ||
320 | void | |
321 | __glXScreenInit(__GLXscreen * pGlxScreen, ScreenPtr pScreen) | |
322 | { | |
323 | __GLXconfig *m; | |
324 | __GLXconfig *config; | |
325 | int i; | |
326 | ||
327 | if (!dixRegisterPrivateKey(&glxScreenPrivateKeyRec, PRIVATE_SCREEN, 0)) | |
328 | return; | |
329 | ||
330 | pGlxScreen->pScreen = pScreen; | |
331 | pGlxScreen->GLextensions = strdup(GLServerExtensions); | |
332 | pGlxScreen->GLXextensions = strdup(GLXServerExtensions); | |
333 | ||
334 | /* All GLX providers must support all of the functionality required for at | |
335 | * least GLX 1.2. If the provider supports a higher version, the GLXminor | |
336 | * version can be changed in the provider's screen-probe routine. For | |
337 | * most providers, the screen-probe routine is the caller of this | |
338 | * function. | |
339 | */ | |
340 | pGlxScreen->GLXmajor = 1; | |
341 | pGlxScreen->GLXminor = 2; | |
342 | ||
343 | pGlxScreen->CloseScreen = pScreen->CloseScreen; | |
344 | pScreen->CloseScreen = glxCloseScreen; | |
345 | ||
346 | i = 0; | |
347 | for (m = pGlxScreen->fbconfigs; m != NULL; m = m->next) { | |
348 | m->fbconfigID = FakeClientID(0); | |
349 | m->visualID = 0; | |
350 | i++; | |
351 | } | |
352 | pGlxScreen->numFBConfigs = i; | |
353 | ||
354 | pGlxScreen->visuals = | |
355 | calloc(pGlxScreen->numFBConfigs, sizeof(__GLXconfig *)); | |
356 | ||
357 | /* First, try to choose featureful FBconfigs for the existing X visuals. | |
358 | * Note that if multiple X visuals end up with the same FBconfig being | |
359 | * chosen, the later X visuals don't get GLX visuals (because we want to | |
360 | * prioritize the root visual being GLX). | |
361 | */ | |
362 | for (i = 0; i < pScreen->numVisuals; i++) { | |
363 | VisualPtr visual = &pScreen->visuals[i]; | |
364 | ||
365 | config = pickFBConfig(pGlxScreen, visual); | |
366 | if (config) { | |
367 | pGlxScreen->visuals[pGlxScreen->numVisuals++] = config; | |
368 | config->visualID = visual->vid; | |
369 | } | |
370 | } | |
371 | ||
372 | /* Then, add new visuals corresponding to all FBconfigs that didn't have | |
373 | * an existing, appropriate visual. | |
374 | */ | |
375 | for (config = pGlxScreen->fbconfigs; config != NULL; config = config->next) { | |
376 | int depth; | |
377 | ||
378 | VisualPtr visual; | |
379 | ||
380 | if (config->visualID != 0) | |
381 | continue; | |
382 | ||
383 | /* Only count RGB bits and not alpha, as we're not trying to create | |
384 | * visuals for compositing (that's what the 32-bit composite visual | |
385 | * set up above is for. | |
386 | */ | |
387 | depth = config->redBits + config->greenBits + config->blueBits; | |
388 | ||
389 | /* Make sure that our FBconfig's depth can actually be displayed | |
390 | * (corresponds to an existing visual). | |
391 | */ | |
392 | for (i = 0; i < pScreen->numVisuals; i++) { | |
393 | if (depth == pScreen->visuals[i].nplanes) | |
394 | break; | |
395 | } | |
396 | /* if it can't, fix up the fbconfig to not advertise window support */ | |
397 | if (i == pScreen->numVisuals) | |
398 | config->drawableType &= ~(GLX_WINDOW_BIT); | |
399 | ||
400 | /* fbconfig must support window drawables */ | |
401 | if (!(config->drawableType & GLX_WINDOW_BIT)) { | |
402 | config->visualID = 0; | |
403 | continue; | |
404 | } | |
405 | ||
406 | /* Create a new X visual for our FBconfig. */ | |
407 | visual = AddScreenVisuals(pScreen, 1, depth); | |
408 | if (visual == NULL) | |
409 | continue; | |
410 | ||
411 | pGlxScreen->visuals[pGlxScreen->numVisuals++] = config; | |
412 | initGlxVisual(visual, config); | |
413 | } | |
414 | ||
415 | dixSetPrivate(&pScreen->devPrivates, glxScreenPrivateKey, pGlxScreen); | |
416 | } | |
417 | ||
418 | void | |
419 | __glXScreenDestroy(__GLXscreen * screen) | |
420 | { | |
421 | free(screen->GLXextensions); | |
422 | free(screen->GLextensions); | |
423 | free(screen->visuals); | |
424 | } |