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 const __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
 151     depth_bits_array[0] = 0;
 152     depth_bits_array[1] = 0;
 153     depth_bits_array[2] = depth_bits;
 154     depth_bits_array[3] = depth_bits;
 155
 156     /* Just like with the accumulation buffer, always provide some modes
 157      * with a stencil buffer.
 158      */
 159     stencil_bits_array[0] = 0;
 160     stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;
 161     stencil_bits_array[2] = 0;
 162     stencil_bits_array[3] = (stencil_bits == 0) ? 8 : stencil_bits;
 163
 164     depth_buffer_factor = 4;
 165     back_buffer_factor = 2;
 166
 167     switch (pixel_bits) {
 168     case 8:
 169         fb_format = GL_RGB;
 170         fb_type = GL_UNSIGNED_BYTE_2_3_3_REV;
 171         break;
 172     case 16:
 173         fb_format = GL_RGB;
 174         fb_type = GL_UNSIGNED_SHORT_5_6_5;
 175         break;
 176     case 24:
 177         fb_format = GL_BGR;
 178         fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 179         break;
 180     case 32:
 181         fb_format = GL_BGRA;
 182         fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 183         break;
 184     default:
 185         fprintf(stderr, "[%s:%u] bad depth %d\n", __func__, __LINE__,
 186                 pixel_bits);
 187         return NULL;
 188     }
 189
 190     configs = driCreateConfigs(fb_format, fb_type,
 191                                depth_bits_array, stencil_bits_array,
 192                                depth_buffer_factor, back_buffer_modes,
 193                                back_buffer_factor);
 194     if (configs == NULL) {
 195         fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 196                 __LINE__);
 197         return NULL;
 198     }
 199
 200     return (const __DRIconfig **)configs;
 201 }
 202
 203 static __DRIscreen *
 204 driCreateNewScreen(int scrn, const __DRIextension **extensions,
 205                    const __DRIconfig ***driver_configs, void *data)
 206 {
 207     static const __DRIextension *emptyExtensionList[] = { NULL };
 208     __DRIscreen *psp;
 209     const __DRIconfig **configs8, **configs16, **configs24, **configs32;
 210
 211     (void) data;
 212
 213     TRACE;
 214
 215     psp = _mesa_calloc(sizeof(*psp));
 216     if (!psp)
 217         return NULL;
 218
 219     setupLoaderExtensions(psp, extensions);
 220
 221     psp->num = scrn;
 222     psp->extensions = emptyExtensionList;
 223
 224     configs8  = swrastFillInModes(psp,  8,  8, 0, 1);
 225     configs16 = swrastFillInModes(psp, 16, 16, 0, 1);
 226     configs24 = swrastFillInModes(psp, 24, 24, 8, 1);
 227     configs32 = swrastFillInModes(psp, 32, 24, 8, 1);
 228
 229     configs16 = driConcatConfigs(configs8, configs16);
 230     configs24 = driConcatConfigs(configs16, configs24);
 231     *driver_configs = driConcatConfigs(configs24, configs32);
 232
 233     driInitExtensions( NULL, card_extensions, GL_FALSE );
 234
 235     return psp;
 236 }
 237
 238 static void driDestroyScreen(__DRIscreen *psp)
 239 {
 240     TRACE;
 241
 242     if (psp) {
 243         _mesa_free(psp);
 244     }
 245 }
 246
 247 static const __DRIextension **driGetExtensions(__DRIscreen *psp)
 248 {
 249     TRACE;
 250
 251     return psp->extensions;
 252 }
 253
 254
 255 /**
 256  * Framebuffer and renderbuffer-related functions.
 257  */
 258
 259 static GLuint
 260 choose_pixel_format(const GLvisual *v)
 261 {
 262     if (v->rgbMode) {
 263         int depth = v->rgbBits;
 264
 265         if (depth == 32
 266             && v->redMask   == 0xff0000
 267             && v->greenMask == 0x00ff00
 268             && v->blueMask  == 0x0000ff)
 269             return PF_A8R8G8B8;
 270         else if (depth == 24
 271             && v->redMask   == 0xff0000
 272             && v->greenMask == 0x00ff00
 273             && v->blueMask  == 0x0000ff)
 274             return PF_X8R8G8B8;
 275         else if (depth == 16
 276             && v->redMask   == 0xf800
 277             && v->greenMask == 0x07e0
 278             && v->blueMask  == 0x001f)
 279             return PF_R5G6B5;
 280         else if (depth == 8
 281             && v->redMask   == 0x07
 282             && v->greenMask == 0x38
 283             && v->blueMask  == 0xc0)
 284             return PF_R3G3B2;
 285     }
 286     else {
 287         if (v->indexBits == 8)
 288             return PF_CI8;
 289     }
 290
 291     _mesa_problem( NULL, "unexpected format in %s", __FUNCTION__ );
 292     return 0;
 293 }
 294
 295 static void
 296 swrast_delete_renderbuffer(struct gl_renderbuffer *rb)
 297 {
 298     TRACE;
 299
 300     _mesa_free(rb->Data);
 301     _mesa_free(rb);
 302 }
 303
 304 static GLboolean
 305 swrast_alloc_front_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
 306                            GLenum internalFormat, GLuint width, GLuint height)
 307 {
 308     struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
 309     unsigned mask = PITCH_ALIGN_BITS - 1;
 310
 311     TRACE;
 312
 313     rb->Data = NULL;
 314     rb->Width = width;
 315     rb->Height = height;
 316
 317     /* always pad to PITCH_ALIGN_BITS */
 318     xrb->pitch = ((width * xrb->bpp + mask) & ~mask) / 8;
 319
 320     return GL_TRUE;
 321 }
 322
 323 static GLboolean
 324 swrast_alloc_back_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
 325                           GLenum internalFormat, GLuint width, GLuint height)
 326 {
 327     struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
 328
 329     TRACE;
 330
 331     _mesa_free(rb->Data);
 332
 333     swrast_alloc_front_storage(ctx, rb, internalFormat, width, height);
 334
 335     rb->Data = _mesa_malloc(height * xrb->pitch);
 336
 337     return GL_TRUE;
 338 }
 339
 340 static struct swrast_renderbuffer *
 341 swrast_new_renderbuffer(const GLvisual *visual, GLboolean front)
 342 {
 343     struct swrast_renderbuffer *xrb = _mesa_calloc(sizeof *xrb);
 344     GLuint pixel_format;
 345
 346     TRACE;
 347
 348     if (!xrb)
 349         return NULL;
 350
 351     _mesa_init_renderbuffer(&xrb->Base, 0);
 352
 353     pixel_format = choose_pixel_format(visual);
 354
 355     xrb->Base.Delete = swrast_delete_renderbuffer;
 356     if (front) {
 357         xrb->Base.AllocStorage = swrast_alloc_front_storage;
 358         swrast_set_span_funcs_front(xrb, pixel_format);
 359     }
 360     else {
 361         xrb->Base.AllocStorage = swrast_alloc_back_storage;
 362         swrast_set_span_funcs_back(xrb, pixel_format);
 363     }
 364
 365     switch (pixel_format) {
 366     case PF_A8R8G8B8:
 367         xrb->Base.InternalFormat = GL_RGBA;
 368         xrb->Base._BaseFormat = GL_RGBA;
 369         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 370         xrb->Base.RedBits   = 8 * sizeof(GLubyte);
 371         xrb->Base.GreenBits = 8 * sizeof(GLubyte);
 372         xrb->Base.BlueBits  = 8 * sizeof(GLubyte);
 373         xrb->Base.AlphaBits = 8 * sizeof(GLubyte);
 374         xrb->bpp = 32;
 375         break;
 376     case PF_X8R8G8B8:
 377         xrb->Base.InternalFormat = GL_RGB;
 378         xrb->Base._BaseFormat = GL_RGB;
 379         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 380         xrb->Base.RedBits   = 8 * sizeof(GLubyte);
 381         xrb->Base.GreenBits = 8 * sizeof(GLubyte);
 382         xrb->Base.BlueBits  = 8 * sizeof(GLubyte);
 383         xrb->Base.AlphaBits = 0;
 384         xrb->bpp = 32;
 385         break;
 386     case PF_R5G6B5:
 387         xrb->Base.InternalFormat = GL_RGB;
 388         xrb->Base._BaseFormat = GL_RGB;
 389         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 390         xrb->Base.RedBits   = 5 * sizeof(GLubyte);
 391         xrb->Base.GreenBits = 6 * sizeof(GLubyte);
 392         xrb->Base.BlueBits  = 5 * sizeof(GLubyte);
 393         xrb->Base.AlphaBits = 0;
 394         xrb->bpp = 16;
 395         break;
 396     case PF_R3G3B2:
 397         xrb->Base.InternalFormat = GL_RGB;
 398         xrb->Base._BaseFormat = GL_RGB;
 399         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 400         xrb->Base.RedBits   = 3 * sizeof(GLubyte);
 401         xrb->Base.GreenBits = 3 * sizeof(GLubyte);
 402         xrb->Base.BlueBits  = 2 * sizeof(GLubyte);
 403         xrb->Base.AlphaBits = 0;
 404         xrb->bpp = 8;
 405         break;
 406     case PF_CI8:
 407         xrb->Base.InternalFormat = GL_COLOR_INDEX8_EXT;
 408         xrb->Base._BaseFormat = GL_COLOR_INDEX;
 409         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 410         xrb->Base.IndexBits = 8 * sizeof(GLubyte);
 411         xrb->bpp = 8;
 412         break;
 413     default:
 414         return NULL;
 415     }
 416
 417     return xrb;
 418 }
 419
 420 static __DRIdrawable *
 421 driCreateNewDrawable(__DRIscreen *screen,
 422                      const __DRIconfig *config, void *data)
 423 {
 424     __DRIdrawable *buf;
 425     struct swrast_renderbuffer *frontrb, *backrb;
 426
 427     TRACE;
 428
 429     buf = _mesa_calloc(sizeof *buf);
 430     if (!buf)
 431         return NULL;
 432
 433     buf->loaderPrivate = data;
 434
 435     buf->driScreenPriv = screen;
 436
 437     buf->row = _mesa_malloc(MAX_WIDTH * 4);
 438
 439     /* basic framebuffer setup */
 440     _mesa_initialize_framebuffer(&buf->Base, &config->modes);
 441
 442     /* add front renderbuffer */
 443     frontrb = swrast_new_renderbuffer(&config->modes, GL_TRUE);
 444     _mesa_add_renderbuffer(&buf->Base, BUFFER_FRONT_LEFT, &frontrb->Base);
 445
 446     /* add back renderbuffer */
 447     if (config->modes.doubleBufferMode) {
 448         backrb = swrast_new_renderbuffer(&config->modes, GL_FALSE);
 449         _mesa_add_renderbuffer(&buf->Base, BUFFER_BACK_LEFT, &backrb->Base);
 450     }
 451
 452     /* add software renderbuffers */
 453     _mesa_add_soft_renderbuffers(&buf->Base,
 454                                  GL_FALSE, /* color */
 455                                  config->modes.haveDepthBuffer,
 456                                  config->modes.haveStencilBuffer,
 457                                  config->modes.haveAccumBuffer,
 458                                  GL_FALSE, /* alpha */
 459                                  GL_FALSE /* aux bufs */);
 460
 461     return buf;
 462 }
 463
 464 static void
 465 driDestroyDrawable(__DRIdrawable *buf)
 466 {
 467     TRACE;
 468
 469     if (buf) {
 470         struct gl_framebuffer *fb = &buf->Base;
 471
 472         _mesa_free(buf->row);
 473
 474         fb->DeletePending = GL_TRUE;
 475         _mesa_unreference_framebuffer(&fb);
 476     }
 477 }
 478
 479 static void driSwapBuffers(__DRIdrawable *buf)
 480 {
 481     GET_CURRENT_CONTEXT(ctx);
 482
 483     struct swrast_renderbuffer *frontrb =
 484         swrast_renderbuffer(buf->Base.Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
 485     struct swrast_renderbuffer *backrb =
 486         swrast_renderbuffer(buf->Base.Attachment[BUFFER_BACK_LEFT].Renderbuffer);
 487
 488     __DRIscreen *screen = buf->driScreenPriv;
 489
 490     TRACE;
 491
 492     /* check for signle-buffered */
 493     if (backrb == NULL)
 494         return;
 495
 496     /* check if swapping currently bound buffer */
 497     if (ctx && ctx->DrawBuffer == &(buf->Base)) {
 498         /* flush pending rendering */
 499         _mesa_notifySwapBuffers(ctx);
 500     }
 501
 502     screen->swrast_loader->putImage(buf, __DRI_SWRAST_IMAGE_OP_SWAP,
 503                                     0, 0,
 504                                     frontrb->Base.Width,
 505                                     frontrb->Base.Height,
 506                                     backrb->Base.Data,
 507                                     buf->loaderPrivate);
 508 }
 509
 510
 511 /**
 512  * General device driver functions.
 513  */
 514
 515 static void
 516 get_window_size( GLframebuffer *fb, GLsizei *w, GLsizei *h )
 517 {
 518     __DRIdrawable *buf = swrast_drawable(fb);
 519     __DRIscreen *screen = buf->driScreenPriv;
 520     int x, y;
 521
 522     screen->swrast_loader->getDrawableInfo(buf,
 523                                            &x, &y, w, h,
 524                                            buf->loaderPrivate);
 525 }
 526
 527 static void
 528 swrast_check_and_update_window_size( GLcontext *ctx, GLframebuffer *fb )
 529 {
 530     GLsizei width, height;
 531
 532     get_window_size(fb, &width, &height);
 533     if (fb->Width != width || fb->Height != height) {
 534         _mesa_resize_framebuffer(ctx, fb, width, height);
 535     }
 536 }
 537
 538 static const GLubyte *
 539 get_string(GLcontext *ctx, GLenum pname)
 540 {
 541     (void) ctx;
 542     switch (pname) {
 543         case GL_VENDOR:
 544             return (const GLubyte *) "Mesa Project";
 545         case GL_RENDERER:
 546             return (const GLubyte *) "Software Rasterizer";
 547         default:
 548             return NULL;
 549     }
 550 }
 551
 552 static void
 553 update_state( GLcontext *ctx, GLuint new_state )
 554 {
 555     /* not much to do here - pass it on */
 556     _swrast_InvalidateState( ctx, new_state );
 557     _swsetup_InvalidateState( ctx, new_state );
 558     _vbo_InvalidateState( ctx, new_state );
 559     _tnl_InvalidateState( ctx, new_state );
 560 }
 561
 562 static void
 563 viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 564 {
 565     GLframebuffer *draw = ctx->WinSysDrawBuffer;
 566     GLframebuffer *read = ctx->WinSysReadBuffer;
 567
 568     swrast_check_and_update_window_size(ctx, draw);
 569     swrast_check_and_update_window_size(ctx, read);
 570 }
 571
 572 static void
 573 swrast_init_driver_functions(struct dd_function_table *driver)
 574 {
 575     driver->GetString = get_string;
 576     driver->UpdateState = update_state;
 577     driver->GetBufferSize = NULL;
 578     driver->Viewport = viewport;
 579 }
 580
 581
 582 /**
 583  * Context-related functions.
 584  */
 585
 586 static __DRIcontext *
 587 driCreateNewContext(__DRIscreen *screen, const __DRIconfig *config,
 588                     __DRIcontext *shared, void *data)
 589 {
 590     __DRIcontext *ctx;
 591     GLcontext *mesaCtx;
 592     struct dd_function_table functions;
 593
 594     TRACE;
 595
 596     ctx = _mesa_calloc(sizeof *ctx);
 597     if (!ctx)
 598         return NULL;
 599
 600     ctx->loaderPrivate = data;
 601
 602     ctx->driScreenPriv = screen;
 603
 604     /* build table of device driver functions */
 605     _mesa_init_driver_functions(&functions);
 606     swrast_init_driver_functions(&functions);
 607
 608     if (!_mesa_initialize_context(&ctx->Base, &config->modes,
 609                                   shared ? &shared->Base : NULL,
 610                                   &functions, (void *) ctx)) {
 611       _mesa_free(ctx);
 612       return NULL;
 613     }
 614
 615     mesaCtx = &ctx->Base;
 616
 617     /* do bounds checking to prevent segfaults and server crashes! */
 618     mesaCtx->Const.CheckArrayBounds = GL_TRUE;
 619
 620     /* create module contexts */
 621     _swrast_CreateContext( mesaCtx );
 622     _vbo_CreateContext( mesaCtx );
 623     _tnl_CreateContext( mesaCtx );
 624     _swsetup_CreateContext( mesaCtx );
 625     _swsetup_Wakeup( mesaCtx );
 626
 627     /* use default TCL pipeline */
 628     {
 629        TNLcontext *tnl = TNL_CONTEXT(mesaCtx);
 630        tnl->Driver.RunPipeline = _tnl_run_pipeline;
 631     }
 632
 633     _mesa_enable_sw_extensions(mesaCtx);
 634     _mesa_enable_1_3_extensions(mesaCtx);
 635     _mesa_enable_1_4_extensions(mesaCtx);
 636     _mesa_enable_1_5_extensions(mesaCtx);
 637     _mesa_enable_2_0_extensions(mesaCtx);
 638     _mesa_enable_2_1_extensions(mesaCtx);
 639
 640     return ctx;
 641 }
 642
 643 static void
 644 driDestroyContext(__DRIcontext *ctx)
 645 {
 646     GLcontext *mesaCtx;
 647     TRACE;
 648
 649     if (ctx) {
 650         mesaCtx = &ctx->Base;
 651         _swsetup_DestroyContext( mesaCtx );
 652         _swrast_DestroyContext( mesaCtx );
 653         _tnl_DestroyContext( mesaCtx );
 654         _vbo_DestroyContext( mesaCtx );
 655         _mesa_destroy_context( mesaCtx );
 656     }
 657 }
 658
 659 static int
 660 driCopyContext(__DRIcontext *dst, __DRIcontext *src, unsigned long mask)
 661 {
 662     TRACE;
 663
 664     _mesa_copy_context(&src->Base, &dst->Base, mask);
 665     return GL_TRUE;
 666 }
 667
 668 static int driBindContext(__DRIcontext *ctx,
 669                           __DRIdrawable *draw,
 670                           __DRIdrawable *read)
 671 {
 672     GLcontext *mesaCtx;
 673     GLframebuffer *mesaDraw;
 674     GLframebuffer *mesaRead;
 675     TRACE;
 676
 677     if (ctx) {
 678         if (!draw || !read)
 679             return GL_FALSE;
 680
 681         mesaCtx = &ctx->Base;
 682         mesaDraw = &draw->Base;
 683         mesaRead = &read->Base;
 684
 685         /* check for same context and buffer */
 686         if (mesaCtx == _mesa_get_current_context()
 687             && mesaCtx->DrawBuffer == mesaDraw
 688             && mesaCtx->ReadBuffer == mesaRead) {
 689             return GL_TRUE;
 690         }
 691
 692         _glapi_check_multithread();
 693
 694         swrast_check_and_update_window_size(mesaCtx, mesaDraw);
 695         if (read != draw)
 696             swrast_check_and_update_window_size(mesaCtx, mesaRead);
 697
 698         _mesa_make_current( mesaCtx,
 699                             mesaDraw,
 700                             mesaRead );
 701     }
 702     else {
 703         /* unbind */
 704         _mesa_make_current( NULL, NULL, NULL );
 705     }
 706
 707     return GL_TRUE;
 708 }
 709
 710 static int driUnbindContext(__DRIcontext *ctx)
 711 {
 712     TRACE;
 713     (void) ctx;
 714     return GL_TRUE;
 715 }
 716
 717
 718 static const __DRIcoreExtension driCoreExtension = {
 719     { __DRI_CORE, __DRI_CORE_VERSION },
 720     NULL, /* driCreateNewScreen */
 721     driDestroyScreen,
 722     driGetExtensions,
 723     driGetConfigAttrib,
 724     driIndexConfigAttrib,
 725     NULL, /* driCreateNewDrawable */
 726     driDestroyDrawable,
 727     driSwapBuffers,
 728     driCreateNewContext,
 729     driCopyContext,
 730     driDestroyContext,
 731     driBindContext,
 732     driUnbindContext
 733 };
 734
 735 static const __DRIswrastExtension driSWRastExtension = {
 736     { __DRI_SWRAST, __DRI_SWRAST_VERSION },
 737     driCreateNewScreen,
 738     driCreateNewDrawable
 739 };
 740
 741 /* This is the table of extensions that the loader will dlsym() for. */
 742 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 743     &driCoreExtension.base,
 744     &driSWRastExtension.base,
 745     NULL
 746 };