glx/glxscreens.c

   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 #define glxScreenPrivateKey (&glxScreenPrivateKeyRec)
  49
  50 const char GLServerVersion[] = "1.4";
  51 static const char GLServerExtensions[] =
  52                         "GL_ARB_depth_texture "
  53                         "GL_ARB_draw_buffers "
  54                         "GL_ARB_fragment_program "
  55                         "GL_ARB_fragment_program_shadow "
  56                         "GL_ARB_imaging "
  57                         "GL_ARB_multisample "
  58                         "GL_ARB_multitexture "
  59                         "GL_ARB_occlusion_query "
  60                         "GL_ARB_point_parameters "
  61                         "GL_ARB_point_sprite "
  62                         "GL_ARB_shadow "
  63                         "GL_ARB_shadow_ambient "
  64                         "GL_ARB_texture_border_clamp "
  65                         "GL_ARB_texture_compression "
  66                         "GL_ARB_texture_cube_map "
  67                         "GL_ARB_texture_env_add "
  68                         "GL_ARB_texture_env_combine "
  69                         "GL_ARB_texture_env_crossbar "
  70                         "GL_ARB_texture_env_dot3 "
  71                         "GL_ARB_texture_mirrored_repeat "
  72                         "GL_ARB_texture_non_power_of_two "
  73                         "GL_ARB_transpose_matrix "
  74                         "GL_ARB_vertex_program "
  75                         "GL_ARB_window_pos "
  76                         "GL_EXT_abgr "
  77                         "GL_EXT_bgra "
  78                         "GL_EXT_blend_color "
  79                         "GL_EXT_blend_equation_separate "
  80                         "GL_EXT_blend_func_separate "
  81                         "GL_EXT_blend_logic_op "
  82                         "GL_EXT_blend_minmax "
  83                         "GL_EXT_blend_subtract "
  84                         "GL_EXT_clip_volume_hint "
  85                         "GL_EXT_copy_texture "
  86                         "GL_EXT_draw_range_elements "
  87                         "GL_EXT_fog_coord "
  88                         "GL_EXT_framebuffer_object "
  89                         "GL_EXT_multi_draw_arrays "
  90                         "GL_EXT_packed_pixels "
  91                         "GL_EXT_paletted_texture "
  92                         "GL_EXT_point_parameters "
  93                         "GL_EXT_polygon_offset "
  94                         "GL_EXT_rescale_normal "
  95                         "GL_EXT_secondary_color "
  96                         "GL_EXT_separate_specular_color "
  97                         "GL_EXT_shadow_funcs "
  98                         "GL_EXT_shared_texture_palette "
  99                         "GL_EXT_stencil_two_side "
 100                         "GL_EXT_stencil_wrap "
 101                         "GL_EXT_subtexture "
 102                         "GL_EXT_texture "
 103                         "GL_EXT_texture3D "
 104                         "GL_EXT_texture_compression_dxt1 "
 105                         "GL_EXT_texture_compression_s3tc "
 106                         "GL_EXT_texture_edge_clamp "
 107                         "GL_EXT_texture_env_add "
 108                         "GL_EXT_texture_env_combine "
 109                         "GL_EXT_texture_env_dot3 "
 110                         "GL_EXT_texture_filter_anisotropic "
 111                         "GL_EXT_texture_lod "
 112                         "GL_EXT_texture_lod_bias "
 113                         "GL_EXT_texture_mirror_clamp "
 114                         "GL_EXT_texture_object "
 115                         "GL_EXT_texture_rectangle "
 116                         "GL_EXT_vertex_array "
 117                         "GL_3DFX_texture_compression_FXT1 "
 118                         "GL_APPLE_packed_pixels "
 119                         "GL_ATI_draw_buffers "
 120                         "GL_ATI_texture_env_combine3 "
 121                         "GL_ATI_texture_mirror_once "
 122                         "GL_HP_occlusion_test "
 123                         "GL_IBM_texture_mirrored_repeat "
 124                         "GL_INGR_blend_func_separate "
 125                         "GL_MESA_pack_invert "
 126                         "GL_MESA_ycbcr_texture "
 127                         "GL_NV_blend_square "
 128                         "GL_NV_depth_clamp "
 129                         "GL_NV_fog_distance "
 130                         "GL_NV_fragment_program "
 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_program "
 142                         "GL_NV_vertex_program1_1 "
 143                         "GL_NV_vertex_program2 "
 144                         "GL_NV_vertex_program2_option "
 145                         "GL_NV_vertex_program3 "
 146                         "GL_OES_compressed_paletted_texture "
 147                         "GL_SGI_color_matrix "
 148                         "GL_SGI_color_table "
 149                         "GL_SGIS_generate_mipmap "
 150                         "GL_SGIS_multisample "
 151                         "GL_SGIS_point_parameters "
 152                         "GL_SGIS_texture_border_clamp "
 153                         "GL_SGIS_texture_edge_clamp "
 154                         "GL_SGIS_texture_lod "
 155                         "GL_SGIX_depth_texture "
 156                         "GL_SGIX_shadow "
 157                         "GL_SGIX_shadow_ambient "
 158                         "GL_SUN_slice_accum "
 159                         ;
 160
 161 /*
 162 ** We have made the simplifying assuption that the same extensions are
 163 ** supported across all screens in a multi-screen system.
 164 */
 165 static char GLXServerVendorName[] = "SGI";
 166 unsigned glxMajorVersion = SERVER_GLX_MAJOR_VERSION;
 167 unsigned glxMinorVersion = SERVER_GLX_MINOR_VERSION;
 168 static char GLXServerExtensions[] =
 169                         "GLX_ARB_multisample "
 170                         "GLX_EXT_visual_info "
 171                         "GLX_EXT_visual_rating "
 172                         "GLX_EXT_import_context "
 173                         "GLX_EXT_texture_from_pixmap "
 174                         "GLX_OML_swap_method "
 175                         "GLX_SGI_make_current_read "
 176 #ifndef __APPLE__
 177                         "GLX_SGIS_multisample "
 178                         "GLX_SGIX_hyperpipe "
 179                         "GLX_SGIX_swap_barrier "
 180 #endif
 181                         "GLX_SGIX_fbconfig "
 182                         "GLX_SGIX_pbuffer "
 183                         "GLX_MESA_copy_sub_buffer "
 184                         "GLX_INTEL_swap_event"
 185                         ;
 186
 187 /*
 188  * If your DDX driver wants to register support for swap barriers or hyperpipe
 189  * topology, it should call __glXHyperpipeInit() or __glXSwapBarrierInit()
 190  * with a dispatch table of functions to handle the requests.   In the XFree86
 191  * DDX, for example, you would call these near the bottom of the driver's
 192  * ScreenInit method, after DRI has been initialized.
 193  *
 194  * This should be replaced with a better method when we teach the server how
 195  * to load DRI drivers.
 196  */
 197
 198 void __glXHyperpipeInit(int screen, __GLXHyperpipeExtensionFuncs *funcs)
 199 {
 200     __GLXscreen *pGlxScreen = glxGetScreen(screenInfo.screens[screen]);
 201
 202     pGlxScreen->hyperpipeFuncs = funcs;
 203 }
 204
 205 void __glXSwapBarrierInit(int screen, __GLXSwapBarrierExtensionFuncs *funcs)
 206 {
 207     __GLXscreen *pGlxScreen = glxGetScreen(screenInfo.screens[screen]);
 208
 209     pGlxScreen->swapBarrierFuncs = funcs;
 210 }
 211
 212 static Bool
 213 glxCloseScreen (int index, ScreenPtr pScreen)
 214 {
 215     __GLXscreen *pGlxScreen = glxGetScreen(pScreen);
 216
 217     pScreen->CloseScreen = pGlxScreen->CloseScreen;
 218
 219     pGlxScreen->destroy(pGlxScreen);
 220
 221     return pScreen->CloseScreen(index, pScreen);
 222 }
 223
 224 __GLXscreen *
 225 glxGetScreen(ScreenPtr pScreen)
 226 {
 227     return dixLookupPrivate(&pScreen->devPrivates, glxScreenPrivateKey);
 228 }
 229
 230 _X_EXPORT void GlxSetVisualConfigs(int nconfigs,
 231                          void *configs, void **privates)
 232 {
 233     /* We keep this stub around for the DDX drivers that still
 234      * call it. */
 235 }
 236
 237 GLint glxConvertToXVisualType(int visualType)
 238 {
 239     static const int x_visual_types[] = {
 240         TrueColor,   DirectColor,
 241         PseudoColor, StaticColor,
 242         GrayScale,   StaticGray
 243     };
 244
 245     return ( (unsigned) (visualType - GLX_TRUE_COLOR) < 6 )
 246         ? x_visual_types[ visualType - GLX_TRUE_COLOR ] : -1;
 247 }
 248
 249 /* This code inspired by composite/compinit.c.  We could move this to
 250  * mi/ and share it with composite.*/
 251
 252 static VisualPtr
 253 AddScreenVisuals(ScreenPtr pScreen, int count, int d)
 254 {
 255     int          i;
 256     DepthPtr     depth;
 257
 258     depth = NULL;
 259     for (i = 0; i < pScreen->numDepths; i++) {
 260         if (pScreen->allowedDepths[i].depth == d) {
 261             depth = &pScreen->allowedDepths[i];
 262             break;
 263         }
 264     }
 265     if (depth == NULL)
 266         return NULL;
 267
 268     if (ResizeVisualArray(pScreen, count, depth) == FALSE)
 269         return NULL;
 270
 271     /* Return a pointer to the first of the added visuals. */
 272     return pScreen->visuals + pScreen->numVisuals - count;
 273 }
 274
 275 static int
 276 findFirstSet(unsigned int v)
 277 {
 278     int i;
 279
 280     for (i = 0; i < 32; i++)
 281         if (v & (1 << i))
 282             return i;
 283
 284     return -1;
 285 }
 286
 287 static void
 288 initGlxVisual(VisualPtr visual, __GLXconfig *config)
 289 {
 290     int maxBits;
 291     maxBits = max(config->redBits, max(config->greenBits, config->blueBits));
 292
 293     config->visualID = visual->vid;
 294     visual->class = glxConvertToXVisualType(config->visualType);
 295     visual->bitsPerRGBValue = maxBits;
 296     visual->ColormapEntries = 1 << maxBits;
 297     visual->nplanes = config->redBits + config->greenBits + config->blueBits;
 298
 299     visual->redMask = config->redMask;
 300     visual->greenMask = config->greenMask;
 301     visual->blueMask = config->blueMask;
 302     visual->offsetRed = findFirstSet(config->redMask);
 303     visual->offsetGreen = findFirstSet(config->greenMask);
 304     visual->offsetBlue = findFirstSet(config->blueMask);
 305 }
 306
 307 static __GLXconfig *
 308 pickFBConfig(__GLXscreen *pGlxScreen, VisualPtr visual)
 309 {
 310     __GLXconfig *best = NULL, *config;
 311     int best_score = 0;
 312
 313     for (config = pGlxScreen->fbconfigs; config != NULL; config = config->next) {
 314         int score = 0;
 315
 316         if (config->redMask != visual->redMask ||
 317             config->greenMask != visual->greenMask ||
 318             config->blueMask != visual->blueMask)
 319             continue;
 320         if (config->visualRating != GLX_NONE)
 321             continue;
 322         if (glxConvertToXVisualType(config->visualType) != visual->class)
 323             continue;
 324         /* If it's the 32-bit RGBA visual, demand a 32-bit fbconfig. */
 325         if (visual->nplanes == 32 && config->rgbBits != 32)
 326             continue;
 327         /* Can't use the same FBconfig for multiple X visuals.  I think. */
 328         if (config->visualID != 0)
 329             continue;
 330
 331         if (config->doubleBufferMode > 0)
 332             score += 8;
 333         if (config->depthBits > 0)
 334             score += 4;
 335         if (config->stencilBits > 0)
 336             score += 2;
 337         if (config->alphaBits > 0)
 338             score++;
 339
 340         if (score > best_score) {
 341             best = config;
 342             best_score = score;
 343         }
 344     }
 345
 346     return best;
 347 }
 348
 349 void __glXScreenInit(__GLXscreen *pGlxScreen, ScreenPtr pScreen)
 350 {
 351     __GLXconfig *m;
 352     __GLXconfig *config;
 353     int i;
 354
 355     if (!dixRegisterPrivateKey(&glxScreenPrivateKeyRec, PRIVATE_SCREEN, 0))
 356         return;
 357
 358     pGlxScreen->pScreen       = pScreen;
 359     pGlxScreen->GLextensions  = strdup(GLServerExtensions);
 360     pGlxScreen->GLXvendor     = strdup(GLXServerVendorName);
 361     pGlxScreen->GLXextensions = strdup(GLXServerExtensions);
 362
 363     /* All GLX providers must support all of the functionality required for at
 364      * least GLX 1.2.  If the provider supports a higher version, the GLXminor
 365      * version can be changed in the provider's screen-probe routine.  For
 366      * most providers, the screen-probe routine is the caller of this
 367      * function.
 368      */
 369     pGlxScreen->GLXmajor      = 1;
 370     pGlxScreen->GLXminor      = 2;
 371
 372     pGlxScreen->CloseScreen = pScreen->CloseScreen;
 373     pScreen->CloseScreen = glxCloseScreen;
 374
 375     i = 0;
 376     for (m = pGlxScreen->fbconfigs; m != NULL; m = m->next) {
 377         m->fbconfigID = FakeClientID(0);
 378         m->visualID = 0;
 379         i++;
 380     }
 381     pGlxScreen->numFBConfigs = i;
 382
 383     pGlxScreen->visuals =
 384         calloc(pGlxScreen->numFBConfigs, sizeof (__GLXconfig *));
 385
 386     /* First, try to choose featureful FBconfigs for the existing X visuals.
 387      * Note that if multiple X visuals end up with the same FBconfig being
 388      * chosen, the later X visuals don't get GLX visuals (because we want to
 389      * prioritize the root visual being GLX).
 390      */
 391     for (i = 0; i < pScreen->numVisuals; i++) {
 392         VisualPtr visual = &pScreen->visuals[i];
 393
 394         config = pickFBConfig(pGlxScreen, visual);
 395         if (config) {
 396             pGlxScreen->visuals[pGlxScreen->numVisuals++] = config;
 397             config->visualID = visual->vid;
 398         }
 399     }
 400
 401     /* Then, add new visuals corresponding to all FBconfigs that didn't have
 402      * an existing, appropriate visual.
 403      */
 404     for (config = pGlxScreen->fbconfigs; config != NULL; config = config->next) {
 405         int depth;
 406
 407         VisualPtr visual;
 408
 409         if (config->visualID != 0)
 410             continue;
 411
 412         /* Only count RGB bits and not alpha, as we're not trying to create
 413          * visuals for compositing (that's what the 32-bit composite visual
 414          * set up above is for.
 415          */
 416         depth = config->redBits + config->greenBits + config->blueBits;
 417
 418         /* Make sure that our FBconfig's depth can actually be displayed
 419          * (corresponds to an existing visual).
 420          */
 421         for (i = 0; i < pScreen->numVisuals; i++) {
 422             if (depth == pScreen->visuals[i].nplanes)
 423                 break;
 424         }
 425         if (i == pScreen->numVisuals)
 426             continue;
 427
 428         /* Create a new X visual for our FBconfig. */
 429         visual = AddScreenVisuals(pScreen, 1, depth);
 430         if (visual == NULL)
 431             continue;
 432
 433         pGlxScreen->visuals[pGlxScreen->numVisuals++] = config;
 434         initGlxVisual(visual, config);
 435     }
 436
 437     dixSetPrivate(&pScreen->devPrivates, glxScreenPrivateKey, pGlxScreen);
 438 }
 439
 440 void __glXScreenDestroy(__GLXscreen *screen)
 441 {
 442     free(screen->GLXvendor);
 443     free(screen->GLXextensions);
 444     free(screen->GLextensions);
 445 }