src/mesa/drivers/dri/swrast/swrast.c

   1 /*
   2  * Copyright (C) 2008 George Sapountzis <gsap7@yahoo.gr>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included
  12  * in all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  */
  21
  22 /*
  23  * DRI software rasterizer
  24  *
  25  * This is the mesa swrast module packaged into a DRI driver structure.
  26  *
  27  * The front-buffer is allocated by the loader. The loader provides read/write
  28  * callbacks for access to the front-buffer. The driver uses a scratch row for
  29  * front-buffer rendering to avoid repeated calls to the loader.
  30  *
  31  * The back-buffer is allocated by the driver and is private.
  32  */
  33
  34 #include "main/context.h"
  35 #include "main/extensions.h"
  36 #include "main/framebuffer.h"
  37 #include "main/imports.h"
  38 #include "main/renderbuffer.h"
  39 #include "swrast/swrast.h"
  40 #include "swrast_setup/swrast_setup.h"
  41 #include "tnl/tnl.h"
  42 #include "tnl/t_context.h"
  43 #include "tnl/t_pipeline.h"
  44 #include "vbo/vbo.h"
  45 #include "drivers/common/driverfuncs.h"
  46 #include "utils.h"
  47
  48 #include "swrast_priv.h"
  49
  50
  51 #define need_GL_VERSION_1_3
  52 #define need_GL_VERSION_1_4
  53 #define need_GL_VERSION_1_5
  54 #define need_GL_VERSION_2_0
  55 #define need_GL_VERSION_2_1
  56
  57 /* sw extensions for imaging */
  58 #define need_GL_EXT_blend_color
  59 #define need_GL_EXT_blend_minmax
  60 #define need_GL_EXT_convolution
  61 #define need_GL_EXT_histogram
  62 #define need_GL_SGI_color_table
  63
  64 /* sw extensions not associated with some GL version */
  65 #define need_GL_ARB_shader_objects
  66 #define need_GL_ARB_vertex_program
  67 #define need_GL_APPLE_vertex_array_object
  68 #define need_GL_ATI_fragment_shader
  69 #define need_GL_ATI_separate_stencil
  70 #define need_GL_EXT_depth_bounds_test
  71 #define need_GL_EXT_framebuffer_object
  72 #define need_GL_EXT_framebuffer_blit
  73 #define need_GL_EXT_gpu_program_parameters
  74 #define need_GL_EXT_paletted_texture
  75 #define need_GL_EXT_stencil_two_side
  76 #define need_GL_MESA_resize_buffers
  77 #define need_GL_NV_vertex_program
  78 #define need_GL_NV_fragment_program
  79
  80 #include "extension_helper.h"
  81
  82 const struct dri_extension card_extensions[] =
  83 {
  84     { "GL_VERSION_1_3",                 GL_VERSION_1_3_functions },
  85     { "GL_VERSION_1_4",                 GL_VERSION_1_4_functions },
  86     { "GL_VERSION_1_5",                 GL_VERSION_1_5_functions },
  87     { "GL_VERSION_2_0",                 GL_VERSION_2_0_functions },
  88     { "GL_VERSION_2_1",                 GL_VERSION_2_1_functions },
  89
  90     { "GL_EXT_blend_color",             GL_EXT_blend_color_functions },
  91     { "GL_EXT_blend_minmax",            GL_EXT_blend_minmax_functions },
  92     { "GL_EXT_convolution",             GL_EXT_convolution_functions },
  93     { "GL_EXT_histogram",               GL_EXT_histogram_functions },
  94     { "GL_SGI_color_table",             GL_SGI_color_table_functions },
  95
  96     { "GL_ARB_shader_objects",          GL_ARB_shader_objects_functions },
  97     { "GL_ARB_vertex_program",          GL_ARB_vertex_program_functions },
  98     { "GL_APPLE_vertex_array_object",   GL_APPLE_vertex_array_object_functions },
  99     { "GL_ATI_fragment_shader",         GL_ATI_fragment_shader_functions },
 100     { "GL_ATI_separate_stencil",        GL_ATI_separate_stencil_functions },
 101     { "GL_EXT_depth_bounds_test",       GL_EXT_depth_bounds_test_functions },
 102     { "GL_EXT_framebuffer_object",      GL_EXT_framebuffer_object_functions },
 103     { "GL_EXT_framebuffer_blit",        GL_EXT_framebuffer_blit_functions },
 104     { "GL_EXT_gpu_program_parameters",  GL_EXT_gpu_program_parameters_functions },
 105     { "GL_EXT_paletted_texture",        GL_EXT_paletted_texture_functions },
 106     { "GL_EXT_stencil_two_side",        GL_EXT_stencil_two_side_functions },
 107     { "GL_MESA_resize_buffers",         GL_MESA_resize_buffers_functions },
 108     { "GL_NV_vertex_program",           GL_NV_vertex_program_functions },
 109     { "GL_NV_fragment_program",         GL_NV_fragment_program_functions },
 110     { NULL,                             NULL }
 111 };
 112
 113
 114 /**
 115  * Screen and config-related functions
 116  */
 117
 118 static void
 119 setupLoaderExtensions(__DRIscreen *psp,
 120                       const __DRIextension **extensions)
 121 {
 122     int i;
 123
 124     for (i = 0; extensions[i]; i++) {
 125         if (strcmp(extensions[i]->name, __DRI_SWRAST_LOADER) == 0)
 126             psp->swrast_loader = (__DRIswrastLoaderExtension *) extensions[i];
 127     }
 128 }
 129
 130 static __DRIconfig **
 131 swrastFillInModes(__DRIscreen *psp,
 132                   unsigned pixel_bits, unsigned depth_bits,
 133                   unsigned stencil_bits, GLboolean have_back_buffer)
 134 {
 135     __DRIconfig **configs;
 136     unsigned depth_buffer_factor;
 137     unsigned back_buffer_factor;
 138     GLenum fb_format;
 139     GLenum fb_type;
 140
 141     /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
 142      * support pageflipping at all.
 143      */
 144     static const GLenum back_buffer_modes[] = {
 145         GLX_NONE, GLX_SWAP_UNDEFINED_OML
 146     };
 147
 148     uint8_t depth_bits_array[4];
 149     uint8_t stencil_bits_array[4];
 150     uint8_t msaa_samples_array[1];
 151
 152     depth_bits_array[0] = 0;
 153     depth_bits_array[1] = 0;
 154     depth_bits_array[2] = depth_bits;
 155     depth_bits_array[3] = depth_bits;
 156
 157     /* Just like with the accumulation buffer, always provide some modes
 158      * with a stencil buffer.
 159      */
 160     stencil_bits_array[0] = 0;
 161     stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;
 162     stencil_bits_array[2] = 0;
 163     stencil_bits_array[3] = (stencil_bits == 0) ? 8 : stencil_bits;
 164
 165     msaa_samples_array[0] = 0;
 166
 167     depth_buffer_factor = 4;
 168     back_buffer_factor = 2;
 169
 170     switch (pixel_bits) {
 171     case 8:
 172         fb_format = GL_RGB;
 173         fb_type = GL_UNSIGNED_BYTE_2_3_3_REV;
 174         break;
 175     case 16:
 176         fb_format = GL_RGB;
 177         fb_type = GL_UNSIGNED_SHORT_5_6_5;
 178         break;
 179     case 24:
 180         fb_format = GL_BGR;
 181         fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 182         break;
 183     case 32:
 184         fb_format = GL_BGRA;
 185         fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 186         break;
 187     default:
 188         fprintf(stderr, "[%s:%u] bad depth %d\n", __func__, __LINE__,
 189                 pixel_bits);
 190         return NULL;
 191     }
 192
 193     configs = driCreateConfigs(fb_format, fb_type,
 194                                depth_bits_array, stencil_bits_array,
 195                                depth_buffer_factor, back_buffer_modes,
 196                                back_buffer_factor, msaa_samples_array, 1);
 197     if (configs == NULL) {
 198         fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 199                 __LINE__);
 200         return NULL;
 201     }
 202
 203     return configs;
 204 }
 205
 206 static __DRIscreen *
 207 driCreateNewScreen(int scrn, const __DRIextension **extensions,
 208                    const __DRIconfig ***driver_configs, void *data)
 209 {
 210     static const __DRIextension *emptyExtensionList[] = { NULL };
 211     __DRIscreen *psp;
 212     __DRIconfig **configs8, **configs16, **configs24, **configs32;
 213
 214     (void) data;
 215
 216     TRACE;
 217
 218     psp = _mesa_calloc(sizeof(*psp));
 219     if (!psp)
 220         return NULL;
 221
 222     setupLoaderExtensions(psp, extensions);
 223
 224     psp->num = scrn;
 225     psp->extensions = emptyExtensionList;
 226
 227     configs8  = swrastFillInModes(psp,  8,  8, 0, 1);
 228     configs16 = swrastFillInModes(psp, 16, 16, 0, 1);
 229     configs24 = swrastFillInModes(psp, 24, 24, 8, 1);
 230     configs32 = swrastFillInModes(psp, 32, 24, 8, 1);
 231
 232     configs16 = driConcatConfigs(configs8, configs16);
 233     configs24 = driConcatConfigs(configs16, configs24);
 234     *driver_configs = (const __DRIconfig **)
 235        driConcatConfigs(configs24, configs32);
 236
 237     driInitExtensions( NULL, card_extensions, GL_FALSE );
 238
 239     return psp;
 240 }
 241
 242 static void driDestroyScreen(__DRIscreen *psp)
 243 {
 244     TRACE;
 245
 246     if (psp) {
 247         _mesa_free(psp);
 248     }
 249 }
 250
 251 static const __DRIextension **driGetExtensions(__DRIscreen *psp)
 252 {
 253     TRACE;
 254
 255     return psp->extensions;
 256 }
 257
 258
 259 /**
 260  * Framebuffer and renderbuffer-related functions.
 261  */
 262
 263 static GLuint
 264 choose_pixel_format(const GLvisual *v)
 265 {
 266     if (v->rgbMode) {
 267         int depth = v->rgbBits;
 268
 269         if (depth == 32
 270             && v->redMask   == 0xff0000
 271             && v->greenMask == 0x00ff00
 272             && v->blueMask  == 0x0000ff)
 273             return PF_A8R8G8B8;
 274         else if (depth == 24
 275             && v->redMask   == 0xff0000
 276             && v->greenMask == 0x00ff00
 277             && v->blueMask  == 0x0000ff)
 278             return PF_X8R8G8B8;
 279         else if (depth == 16
 280             && v->redMask   == 0xf800
 281             && v->greenMask == 0x07e0
 282             && v->blueMask  == 0x001f)
 283             return PF_R5G6B5;
 284         else if (depth == 8
 285             && v->redMask   == 0x07
 286             && v->greenMask == 0x38
 287             && v->blueMask  == 0xc0)
 288             return PF_R3G3B2;
 289     }
 290     else {
 291         if (v->indexBits == 8)
 292             return PF_CI8;
 293     }
 294
 295     _mesa_problem( NULL, "unexpected format in %s", __FUNCTION__ );
 296     return 0;
 297 }
 298
 299 static void
 300 swrast_delete_renderbuffer(struct gl_renderbuffer *rb)
 301 {
 302     TRACE;
 303
 304     _mesa_free(rb->Data);
 305     _mesa_free(rb);
 306 }
 307
 308 static GLboolean
 309 swrast_alloc_front_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
 310                            GLenum internalFormat, GLuint width, GLuint height)
 311 {
 312     struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
 313     unsigned mask = PITCH_ALIGN_BITS - 1;
 314
 315     TRACE;
 316
 317     rb->Data = NULL;
 318     rb->Width = width;
 319     rb->Height = height;
 320
 321     /* always pad to PITCH_ALIGN_BITS */
 322     xrb->pitch = ((width * xrb->bpp + mask) & ~mask) / 8;
 323
 324     return GL_TRUE;
 325 }
 326
 327 static GLboolean
 328 swrast_alloc_back_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
 329                           GLenum internalFormat, GLuint width, GLuint height)
 330 {
 331     struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
 332
 333     TRACE;
 334
 335     _mesa_free(rb->Data);
 336
 337     swrast_alloc_front_storage(ctx, rb, internalFormat, width, height);
 338
 339     rb->Data = _mesa_malloc(height * xrb->pitch);
 340
 341     return GL_TRUE;
 342 }
 343
 344 static struct swrast_renderbuffer *
 345 swrast_new_renderbuffer(const GLvisual *visual, GLboolean front)
 346 {
 347     struct swrast_renderbuffer *xrb = _mesa_calloc(sizeof *xrb);
 348     GLuint pixel_format;
 349
 350     TRACE;
 351
 352     if (!xrb)
 353         return NULL;
 354
 355     _mesa_init_renderbuffer(&xrb->Base, 0);
 356
 357     pixel_format = choose_pixel_format(visual);
 358
 359     xrb->Base.Delete = swrast_delete_renderbuffer;
 360     if (front) {
 361         xrb->Base.AllocStorage = swrast_alloc_front_storage;
 362         swrast_set_span_funcs_front(xrb, pixel_format);
 363     }
 364     else {
 365         xrb->Base.AllocStorage = swrast_alloc_back_storage;
 366         swrast_set_span_funcs_back(xrb, pixel_format);
 367     }
 368
 369     switch (pixel_format) {
 370     case PF_A8R8G8B8:
 371         xrb->Base.InternalFormat = GL_RGBA;
 372         xrb->Base._BaseFormat = GL_RGBA;
 373         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 374         xrb->Base.RedBits   = 8 * sizeof(GLubyte);
 375         xrb->Base.GreenBits = 8 * sizeof(GLubyte);
 376         xrb->Base.BlueBits  = 8 * sizeof(GLubyte);
 377         xrb->Base.AlphaBits = 8 * sizeof(GLubyte);
 378         xrb->bpp = 32;
 379         break;
 380     case PF_X8R8G8B8:
 381         xrb->Base.InternalFormat = GL_RGB;
 382         xrb->Base._BaseFormat = GL_RGB;
 383         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 384         xrb->Base.RedBits   = 8 * sizeof(GLubyte);
 385         xrb->Base.GreenBits = 8 * sizeof(GLubyte);
 386         xrb->Base.BlueBits  = 8 * sizeof(GLubyte);
 387         xrb->Base.AlphaBits = 0;
 388         xrb->bpp = 32;
 389         break;
 390     case PF_R5G6B5:
 391         xrb->Base.InternalFormat = GL_RGB;
 392         xrb->Base._BaseFormat = GL_RGB;
 393         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 394         xrb->Base.RedBits   = 5 * sizeof(GLubyte);
 395         xrb->Base.GreenBits = 6 * sizeof(GLubyte);
 396         xrb->Base.BlueBits  = 5 * sizeof(GLubyte);
 397         xrb->Base.AlphaBits = 0;
 398         xrb->bpp = 16;
 399         break;
 400     case PF_R3G3B2:
 401         xrb->Base.InternalFormat = GL_RGB;
 402         xrb->Base._BaseFormat = GL_RGB;
 403         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 404         xrb->Base.RedBits   = 3 * sizeof(GLubyte);
 405         xrb->Base.GreenBits = 3 * sizeof(GLubyte);
 406         xrb->Base.BlueBits  = 2 * sizeof(GLubyte);
 407         xrb->Base.AlphaBits = 0;
 408         xrb->bpp = 8;
 409         break;
 410     case PF_CI8:
 411         xrb->Base.InternalFormat = GL_COLOR_INDEX8_EXT;
 412         xrb->Base._BaseFormat = GL_COLOR_INDEX;
 413         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 414         xrb->Base.IndexBits = 8 * sizeof(GLubyte);
 415         xrb->bpp = 8;
 416         break;
 417     default:
 418         return NULL;
 419     }
 420
 421     return xrb;
 422 }
 423
 424 static __DRIdrawable *
 425 driCreateNewDrawable(__DRIscreen *screen,
 426                      const __DRIconfig *config, void *data)
 427 {
 428     __DRIdrawable *buf;
 429     struct swrast_renderbuffer *frontrb, *backrb;
 430
 431     TRACE;
 432
 433     buf = _mesa_calloc(sizeof *buf);
 434     if (!buf)
 435         return NULL;
 436
 437     buf->loaderPrivate = data;
 438
 439     buf->driScreenPriv = screen;
 440
 441     buf->row = _mesa_malloc(MAX_WIDTH * 4);
 442
 443     /* basic framebuffer setup */
 444     _mesa_initialize_framebuffer(&buf->Base, &config->modes);
 445
 446     /* add front renderbuffer */
 447     frontrb = swrast_new_renderbuffer(&config->modes, GL_TRUE);
 448     _mesa_add_renderbuffer(&buf->Base, BUFFER_FRONT_LEFT, &frontrb->Base);
 449
 450     /* add back renderbuffer */
 451     if (config->modes.doubleBufferMode) {
 452         backrb = swrast_new_renderbuffer(&config->modes, GL_FALSE);
 453         _mesa_add_renderbuffer(&buf->Base, BUFFER_BACK_LEFT, &backrb->Base);
 454     }
 455
 456     /* add software renderbuffers */
 457     _mesa_add_soft_renderbuffers(&buf->Base,
 458                                  GL_FALSE, /* color */
 459                                  config->modes.haveDepthBuffer,
 460                                  config->modes.haveStencilBuffer,
 461                                  config->modes.haveAccumBuffer,
 462                                  GL_FALSE, /* alpha */
 463                                  GL_FALSE /* aux bufs */);
 464
 465     return buf;
 466 }
 467
 468 static void
 469 driDestroyDrawable(__DRIdrawable *buf)
 470 {
 471     TRACE;
 472
 473     if (buf) {
 474         struct gl_framebuffer *fb = &buf->Base;
 475
 476         _mesa_free(buf->row);
 477
 478         fb->DeletePending = GL_TRUE;
 479         _mesa_unreference_framebuffer(&fb);
 480     }
 481 }
 482
 483 static void driSwapBuffers(__DRIdrawable *buf)
 484 {
 485     GET_CURRENT_CONTEXT(ctx);
 486
 487     struct swrast_renderbuffer *frontrb =
 488         swrast_renderbuffer(buf->Base.Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
 489     struct swrast_renderbuffer *backrb =
 490         swrast_renderbuffer(buf->Base.Attachment[BUFFER_BACK_LEFT].Renderbuffer);
 491
 492     __DRIscreen *screen = buf->driScreenPriv;
 493
 494     TRACE;
 495
 496     /* check for signle-buffered */
 497     if (backrb == NULL)
 498         return;
 499
 500     /* check if swapping currently bound buffer */
 501     if (ctx && ctx->DrawBuffer == &(buf->Base)) {
 502         /* flush pending rendering */
 503         _mesa_notifySwapBuffers(ctx);
 504     }
 505
 506     screen->swrast_loader->putImage(buf, __DRI_SWRAST_IMAGE_OP_SWAP,
 507                                     0, 0,
 508                                     frontrb->Base.Width,
 509                                     frontrb->Base.Height,
 510                                     backrb->Base.Data,
 511                                     buf->loaderPrivate);
 512 }
 513
 514
 515 /**
 516  * General device driver functions.
 517  */
 518
 519 static void
 520 get_window_size( GLframebuffer *fb, GLsizei *w, GLsizei *h )
 521 {
 522     __DRIdrawable *buf = swrast_drawable(fb);
 523     __DRIscreen *screen = buf->driScreenPriv;
 524     int x, y;
 525
 526     screen->swrast_loader->getDrawableInfo(buf,
 527                                            &x, &y, w, h,
 528                                            buf->loaderPrivate);
 529 }
 530
 531 static void
 532 swrast_check_and_update_window_size( GLcontext *ctx, GLframebuffer *fb )
 533 {
 534     GLsizei width, height;
 535
 536     get_window_size(fb, &width, &height);
 537     if (fb->Width != width || fb->Height != height) {
 538         _mesa_resize_framebuffer(ctx, fb, width, height);
 539     }
 540 }
 541
 542 static const GLubyte *
 543 get_string(GLcontext *ctx, GLenum pname)
 544 {
 545     (void) ctx;
 546     switch (pname) {
 547         case GL_VENDOR:
 548             return (const GLubyte *) "Mesa Project";
 549         case GL_RENDERER:
 550             return (const GLubyte *) "Software Rasterizer";
 551         default:
 552             return NULL;
 553     }
 554 }
 555
 556 static void
 557 update_state( GLcontext *ctx, GLuint new_state )
 558 {
 559     /* not much to do here - pass it on */
 560     _swrast_InvalidateState( ctx, new_state );
 561     _swsetup_InvalidateState( ctx, new_state );
 562     _vbo_InvalidateState( ctx, new_state );
 563     _tnl_InvalidateState( ctx, new_state );
 564 }
 565
 566 static void
 567 viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 568 {
 569     GLframebuffer *draw = ctx->WinSysDrawBuffer;
 570     GLframebuffer *read = ctx->WinSysReadBuffer;
 571
 572     swrast_check_and_update_window_size(ctx, draw);
 573     swrast_check_and_update_window_size(ctx, read);
 574 }
 575
 576 static void
 577 swrast_init_driver_functions(struct dd_function_table *driver)
 578 {
 579     driver->GetString = get_string;
 580     driver->UpdateState = update_state;
 581     driver->GetBufferSize = NULL;
 582     driver->Viewport = viewport;
 583 }
 584
 585
 586 /**
 587  * Context-related functions.
 588  */
 589
 590 static __DRIcontext *
 591 driCreateNewContext(__DRIscreen *screen, const __DRIconfig *config,
 592                     __DRIcontext *shared, void *data)
 593 {
 594     __DRIcontext *ctx;
 595     GLcontext *mesaCtx;
 596     struct dd_function_table functions;
 597
 598     TRACE;
 599
 600     ctx = _mesa_calloc(sizeof *ctx);
 601     if (!ctx)
 602         return NULL;
 603
 604     ctx->loaderPrivate = data;
 605
 606     ctx->driScreenPriv = screen;
 607
 608     /* build table of device driver functions */
 609     _mesa_init_driver_functions(&functions);
 610     swrast_init_driver_functions(&functions);
 611
 612     if (!_mesa_initialize_context(&ctx->Base, &config->modes,
 613                                   shared ? &shared->Base : NULL,
 614                                   &functions, (void *) ctx)) {
 615       _mesa_free(ctx);
 616       return NULL;
 617     }
 618
 619     mesaCtx = &ctx->Base;
 620
 621     /* do bounds checking to prevent segfaults and server crashes! */
 622     mesaCtx->Const.CheckArrayBounds = GL_TRUE;
 623
 624     /* create module contexts */
 625     _swrast_CreateContext( mesaCtx );
 626     _vbo_CreateContext( mesaCtx );
 627     _tnl_CreateContext( mesaCtx );
 628     _swsetup_CreateContext( mesaCtx );
 629     _swsetup_Wakeup( mesaCtx );
 630
 631     /* use default TCL pipeline */
 632     {
 633        TNLcontext *tnl = TNL_CONTEXT(mesaCtx);
 634        tnl->Driver.RunPipeline = _tnl_run_pipeline;
 635     }
 636
 637     _mesa_enable_sw_extensions(mesaCtx);
 638     _mesa_enable_1_3_extensions(mesaCtx);
 639     _mesa_enable_1_4_extensions(mesaCtx);
 640     _mesa_enable_1_5_extensions(mesaCtx);
 641     _mesa_enable_2_0_extensions(mesaCtx);
 642     _mesa_enable_2_1_extensions(mesaCtx);
 643
 644     return ctx;
 645 }
 646
 647 static void
 648 driDestroyContext(__DRIcontext *ctx)
 649 {
 650     GLcontext *mesaCtx;
 651     TRACE;
 652
 653     if (ctx) {
 654         mesaCtx = &ctx->Base;
 655         _swsetup_DestroyContext( mesaCtx );
 656         _swrast_DestroyContext( mesaCtx );
 657         _tnl_DestroyContext( mesaCtx );
 658         _vbo_DestroyContext( mesaCtx );
 659         _mesa_destroy_context( mesaCtx );
 660     }
 661 }
 662
 663 static int
 664 driCopyContext(__DRIcontext *dst, __DRIcontext *src, unsigned long mask)
 665 {
 666     TRACE;
 667
 668     _mesa_copy_context(&src->Base, &dst->Base, mask);
 669     return GL_TRUE;
 670 }
 671
 672 static int driBindContext(__DRIcontext *ctx,
 673                           __DRIdrawable *draw,
 674                           __DRIdrawable *read)
 675 {
 676     GLcontext *mesaCtx;
 677     GLframebuffer *mesaDraw;
 678     GLframebuffer *mesaRead;
 679     TRACE;
 680
 681     if (ctx) {
 682         if (!draw || !read)
 683             return GL_FALSE;
 684
 685         mesaCtx = &ctx->Base;
 686         mesaDraw = &draw->Base;
 687         mesaRead = &read->Base;
 688
 689         /* check for same context and buffer */
 690         if (mesaCtx == _mesa_get_current_context()
 691             && mesaCtx->DrawBuffer == mesaDraw
 692             && mesaCtx->ReadBuffer == mesaRead) {
 693             return GL_TRUE;
 694         }
 695
 696         _glapi_check_multithread();
 697
 698         swrast_check_and_update_window_size(mesaCtx, mesaDraw);
 699         if (read != draw)
 700             swrast_check_and_update_window_size(mesaCtx, mesaRead);
 701
 702         _mesa_make_current( mesaCtx,
 703                             mesaDraw,
 704                             mesaRead );
 705     }
 706     else {
 707         /* unbind */
 708         _mesa_make_current( NULL, NULL, NULL );
 709     }
 710
 711     return GL_TRUE;
 712 }
 713
 714 static int driUnbindContext(__DRIcontext *ctx)
 715 {
 716     TRACE;
 717     (void) ctx;
 718     return GL_TRUE;
 719 }
 720
 721
 722 static const __DRIcoreExtension driCoreExtension = {
 723     { __DRI_CORE, __DRI_CORE_VERSION },
 724     NULL, /* driCreateNewScreen */
 725     driDestroyScreen,
 726     driGetExtensions,
 727     driGetConfigAttrib,
 728     driIndexConfigAttrib,
 729     NULL, /* driCreateNewDrawable */
 730     driDestroyDrawable,
 731     driSwapBuffers,
 732     driCreateNewContext,
 733     driCopyContext,
 734     driDestroyContext,
 735     driBindContext,
 736     driUnbindContext
 737 };
 738
 739 static const __DRIswrastExtension driSWRastExtension = {
 740     { __DRI_SWRAST, __DRI_SWRAST_VERSION },
 741     driCreateNewScreen,
 742     driCreateNewDrawable
 743 };
 744
 745 /* This is the table of extensions that the loader will dlsym() for. */
 746 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 747     &driCoreExtension.base,
 748     &driSWRastExtension.base,
 749     NULL
 750 };