| 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 | } |