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

   1 /*
   2  * Copyright 2008, 2010 George Sapountzis <gsapountzis@gmail.com>
   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/formats.h"
  37 #include "main/framebuffer.h"
  38 #include "main/imports.h"
  39 #include "main/renderbuffer.h"
  40 #include "swrast/swrast.h"
  41 #include "swrast_setup/swrast_setup.h"
  42 #include "tnl/tnl.h"
  43 #include "tnl/t_context.h"
  44 #include "tnl/t_pipeline.h"
  45 #include "vbo/vbo.h"
  46 #include "drivers/common/driverfuncs.h"
  47 #include "drivers/common/meta.h"
  48 #include "utils.h"
  49
  50 #include "main/teximage.h"
  51 #include "main/texformat.h"
  52 #include "main/texstate.h"
  53
  54 #include "swrast_priv.h"
  55
  56
  57 /**
  58  * Screen and config-related functions
  59  */
  60
  61 static void swrastSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
  62                                 GLint texture_format, __DRIdrawable *dPriv)
  63 {
  64     struct dri_context *dri_ctx;
  65     int x, y, w, h;
  66     __DRIscreen *sPriv = dPriv->driScreenPriv;
  67     struct gl_texture_unit *texUnit;
  68     struct gl_texture_object *texObj;
  69     struct gl_texture_image *texImage;
  70     uint32_t internalFormat;
  71     gl_format texFormat;
  72
  73     dri_ctx = pDRICtx->driverPrivate;
  74
  75     internalFormat = (texture_format == __DRI_TEXTURE_FORMAT_RGB ? 3 : 4);
  76
  77     texUnit = _mesa_get_current_tex_unit(&dri_ctx->Base);
  78     texObj = _mesa_select_tex_object(&dri_ctx->Base, texUnit, target);
  79     texImage = _mesa_get_tex_image(&dri_ctx->Base, texObj, target, 0);
  80
  81     _mesa_lock_texture(&dri_ctx->Base, texObj);
  82
  83     sPriv->swrast_loader->getDrawableInfo(dPriv, &x, &y, &w, &h, dPriv->loaderPrivate);
  84
  85     if (texture_format == __DRI_TEXTURE_FORMAT_RGB)
  86         texFormat = MESA_FORMAT_XRGB8888;
  87     else
  88         texFormat = MESA_FORMAT_ARGB8888;
  89
  90     _mesa_init_teximage_fields(&dri_ctx->Base, target, texImage,
  91                                w, h, 1, 0, internalFormat, texFormat);
  92
  93     sPriv->swrast_loader->getImage(dPriv, x, y, w, h, (char *)texImage->Data,
  94                                    dPriv->loaderPrivate);
  95
  96     _mesa_unlock_texture(&dri_ctx->Base, texObj);
  97 }
  98
  99 static void swrastSetTexBuffer(__DRIcontext *pDRICtx, GLint target,
 100                                __DRIdrawable *dPriv)
 101 {
 102     swrastSetTexBuffer2(pDRICtx, target, __DRI_TEXTURE_FORMAT_RGBA, dPriv);
 103 }
 104
 105 static const __DRItexBufferExtension swrastTexBufferExtension = {
 106     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 107     swrastSetTexBuffer,
 108     swrastSetTexBuffer2,
 109 };
 110
 111 static const __DRIextension *dri_screen_extensions[] = {
 112     &swrastTexBufferExtension.base,
 113     NULL
 114 };
 115
 116 static __DRIconfig **
 117 swrastFillInModes(__DRIscreen *psp,
 118                   unsigned pixel_bits, unsigned depth_bits,
 119                   unsigned stencil_bits, GLboolean have_back_buffer)
 120 {
 121     __DRIconfig **configs;
 122     unsigned depth_buffer_factor;
 123     unsigned back_buffer_factor;
 124     GLenum fb_format;
 125     GLenum fb_type;
 126
 127     /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
 128      * support pageflipping at all.
 129      */
 130     static const GLenum back_buffer_modes[] = {
 131         GLX_NONE, GLX_SWAP_UNDEFINED_OML
 132     };
 133
 134     uint8_t depth_bits_array[4];
 135     uint8_t stencil_bits_array[4];
 136     uint8_t msaa_samples_array[1];
 137
 138     (void) psp;
 139     (void) have_back_buffer;
 140
 141     depth_bits_array[0] = 0;
 142     depth_bits_array[1] = 0;
 143     depth_bits_array[2] = depth_bits;
 144     depth_bits_array[3] = depth_bits;
 145
 146     /* Just like with the accumulation buffer, always provide some modes
 147      * with a stencil buffer.
 148      */
 149     stencil_bits_array[0] = 0;
 150     stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;
 151     stencil_bits_array[2] = 0;
 152     stencil_bits_array[3] = (stencil_bits == 0) ? 8 : stencil_bits;
 153
 154     msaa_samples_array[0] = 0;
 155
 156     depth_buffer_factor = 4;
 157     back_buffer_factor = 2;
 158
 159     switch (pixel_bits) {
 160     case 8:
 161         fb_format = GL_RGB;
 162         fb_type = GL_UNSIGNED_BYTE_2_3_3_REV;
 163         break;
 164     case 16:
 165         fb_format = GL_RGB;
 166         fb_type = GL_UNSIGNED_SHORT_5_6_5;
 167         break;
 168     case 24:
 169         fb_format = GL_BGR;
 170         fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 171         break;
 172     case 32:
 173         fb_format = GL_BGRA;
 174         fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 175         break;
 176     default:
 177         fprintf(stderr, "[%s:%u] bad depth %d\n", __func__, __LINE__,
 178                 pixel_bits);
 179         return NULL;
 180     }
 181
 182     configs = driCreateConfigs(fb_format, fb_type,
 183                                depth_bits_array, stencil_bits_array,
 184                                depth_buffer_factor, back_buffer_modes,
 185                                back_buffer_factor, msaa_samples_array, 1,
 186                                GL_TRUE);
 187     if (configs == NULL) {
 188         fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 189                 __LINE__);
 190         return NULL;
 191     }
 192
 193     return configs;
 194 }
 195
 196 static const __DRIconfig **
 197 dri_init_screen(__DRIscreen * psp)
 198 {
 199     __DRIconfig **configs8, **configs16, **configs24, **configs32;
 200
 201     TRACE;
 202
 203     psp->extensions = dri_screen_extensions;
 204
 205     configs8  = swrastFillInModes(psp,  8,  8, 0, 1);
 206     configs16 = swrastFillInModes(psp, 16, 16, 0, 1);
 207     configs24 = swrastFillInModes(psp, 24, 24, 8, 1);
 208     configs32 = swrastFillInModes(psp, 32, 24, 8, 1);
 209
 210     configs16 = driConcatConfigs(configs8, configs16);
 211     configs24 = driConcatConfigs(configs16, configs24);
 212     configs32 = driConcatConfigs(configs24, configs32);
 213
 214     return (const __DRIconfig **)configs32;
 215 }
 216
 217 static void
 218 dri_destroy_screen(__DRIscreen * sPriv)
 219 {
 220     TRACE;
 221     (void) sPriv;
 222 }
 223
 224
 225 /**
 226  * Framebuffer and renderbuffer-related functions.
 227  */
 228
 229 static GLuint
 230 choose_pixel_format(const struct gl_config *v)
 231 {
 232     int depth = v->rgbBits;
 233
 234     if (depth == 32
 235         && v->redMask   == 0xff0000
 236         && v->greenMask == 0x00ff00
 237         && v->blueMask  == 0x0000ff)
 238         return PF_A8R8G8B8;
 239     else if (depth == 24
 240              && v->redMask   == 0xff0000
 241              && v->greenMask == 0x00ff00
 242              && v->blueMask  == 0x0000ff)
 243         return PF_X8R8G8B8;
 244     else if (depth == 16
 245              && v->redMask   == 0xf800
 246              && v->greenMask == 0x07e0
 247              && v->blueMask  == 0x001f)
 248         return PF_R5G6B5;
 249     else if (depth == 8
 250              && v->redMask   == 0x07
 251              && v->greenMask == 0x38
 252              && v->blueMask  == 0xc0)
 253         return PF_R3G3B2;
 254
 255     _mesa_problem( NULL, "unexpected format in %s", __FUNCTION__ );
 256     return 0;
 257 }
 258
 259 static void
 260 swrast_delete_renderbuffer(struct gl_renderbuffer *rb)
 261 {
 262     TRACE;
 263
 264     free(rb->Data);
 265     free(rb);
 266 }
 267
 268 /* see bytes_per_line in libGL */
 269 static INLINE int
 270 bytes_per_line(unsigned pitch_bits, unsigned mul)
 271 {
 272    unsigned mask = mul - 1;
 273
 274    return ((pitch_bits + mask) & ~mask) / 8;
 275 }
 276
 277 static GLboolean
 278 swrast_alloc_front_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
 279                            GLenum internalFormat, GLuint width, GLuint height)
 280 {
 281     struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
 282
 283     TRACE;
 284
 285     (void) ctx;
 286     (void) internalFormat;
 287
 288     rb->Data = NULL;
 289     rb->Width = width;
 290     rb->Height = height;
 291
 292     xrb->pitch = bytes_per_line(width * xrb->bpp, 32);
 293
 294     return GL_TRUE;
 295 }
 296
 297 static GLboolean
 298 swrast_alloc_back_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
 299                           GLenum internalFormat, GLuint width, GLuint height)
 300 {
 301     struct swrast_renderbuffer *xrb = swrast_renderbuffer(rb);
 302
 303     TRACE;
 304
 305     free(rb->Data);
 306
 307     swrast_alloc_front_storage(ctx, rb, internalFormat, width, height);
 308
 309     rb->Data = malloc(height * xrb->pitch);
 310
 311     return GL_TRUE;
 312 }
 313
 314 static struct swrast_renderbuffer *
 315 swrast_new_renderbuffer(const struct gl_config *visual, GLboolean front)
 316 {
 317     struct swrast_renderbuffer *xrb = calloc(1, sizeof *xrb);
 318     GLuint pixel_format;
 319
 320     TRACE;
 321
 322     if (!xrb)
 323         return NULL;
 324
 325     _mesa_init_renderbuffer(&xrb->Base, 0);
 326
 327     pixel_format = choose_pixel_format(visual);
 328
 329     xrb->Base.Delete = swrast_delete_renderbuffer;
 330     if (front) {
 331         xrb->Base.AllocStorage = swrast_alloc_front_storage;
 332         swrast_set_span_funcs_front(xrb, pixel_format);
 333     }
 334     else {
 335         xrb->Base.AllocStorage = swrast_alloc_back_storage;
 336         swrast_set_span_funcs_back(xrb, pixel_format);
 337     }
 338
 339     switch (pixel_format) {
 340     case PF_A8R8G8B8:
 341         xrb->Base.Format = MESA_FORMAT_ARGB8888;
 342         xrb->Base.InternalFormat = GL_RGBA;
 343         xrb->Base._BaseFormat = GL_RGBA;
 344         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 345         xrb->bpp = 32;
 346         break;
 347     case PF_X8R8G8B8:
 348         xrb->Base.Format = MESA_FORMAT_ARGB8888; /* XXX */
 349         xrb->Base.InternalFormat = GL_RGB;
 350         xrb->Base._BaseFormat = GL_RGB;
 351         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 352         xrb->bpp = 32;
 353         break;
 354     case PF_R5G6B5:
 355         xrb->Base.Format = MESA_FORMAT_RGB565;
 356         xrb->Base.InternalFormat = GL_RGB;
 357         xrb->Base._BaseFormat = GL_RGB;
 358         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 359         xrb->bpp = 16;
 360         break;
 361     case PF_R3G3B2:
 362         xrb->Base.Format = MESA_FORMAT_RGB332;
 363         xrb->Base.InternalFormat = GL_RGB;
 364         xrb->Base._BaseFormat = GL_RGB;
 365         xrb->Base.DataType = GL_UNSIGNED_BYTE;
 366         xrb->bpp = 8;
 367         break;
 368     default:
 369         return NULL;
 370     }
 371
 372     return xrb;
 373 }
 374
 375 static GLboolean
 376 dri_create_buffer(__DRIscreen * sPriv,
 377                   __DRIdrawable * dPriv,
 378                   const struct gl_config * visual, GLboolean isPixmap)
 379 {
 380     struct dri_drawable *drawable = NULL;
 381     struct gl_framebuffer *fb;
 382     struct swrast_renderbuffer *frontrb, *backrb;
 383
 384     TRACE;
 385
 386     (void) sPriv;
 387     (void) isPixmap;
 388
 389     drawable = CALLOC_STRUCT(dri_drawable);
 390     if (drawable == NULL)
 391         goto drawable_fail;
 392
 393     dPriv->driverPrivate = drawable;
 394     drawable->dPriv = dPriv;
 395
 396     drawable->row = malloc(MAX_WIDTH * 4);
 397     if (drawable->row == NULL)
 398         goto drawable_fail;
 399
 400     fb = &drawable->Base;
 401
 402     /* basic framebuffer setup */
 403     _mesa_initialize_window_framebuffer(fb, visual);
 404
 405     /* add front renderbuffer */
 406     frontrb = swrast_new_renderbuffer(visual, GL_TRUE);
 407     _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontrb->Base);
 408
 409     /* add back renderbuffer */
 410     if (visual->doubleBufferMode) {
 411         backrb = swrast_new_renderbuffer(visual, GL_FALSE);
 412         _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backrb->Base);
 413     }
 414
 415     /* add software renderbuffers */
 416     _mesa_add_soft_renderbuffers(fb,
 417                                  GL_FALSE, /* color */
 418                                  visual->haveDepthBuffer,
 419                                  visual->haveStencilBuffer,
 420                                  visual->haveAccumBuffer,
 421                                  GL_FALSE, /* alpha */
 422                                  GL_FALSE /* aux bufs */);
 423
 424     return GL_TRUE;
 425
 426 drawable_fail:
 427
 428     if (drawable)
 429         free(drawable->row);
 430
 431     FREE(drawable);
 432
 433     return GL_FALSE;
 434 }
 435
 436 static void
 437 dri_destroy_buffer(__DRIdrawable * dPriv)
 438 {
 439     TRACE;
 440
 441     if (dPriv) {
 442         struct dri_drawable *drawable = dri_drawable(dPriv);
 443         struct gl_framebuffer *fb;
 444
 445         free(drawable->row);
 446
 447         fb = &drawable->Base;
 448
 449         fb->DeletePending = GL_TRUE;
 450         _mesa_reference_framebuffer(&fb, NULL);
 451     }
 452 }
 453
 454 static void
 455 dri_swap_buffers(__DRIdrawable * dPriv)
 456 {
 457     __DRIscreen *sPriv = dPriv->driScreenPriv;
 458
 459     GET_CURRENT_CONTEXT(ctx);
 460
 461     struct dri_drawable *drawable = dri_drawable(dPriv);
 462     struct gl_framebuffer *fb;
 463     struct swrast_renderbuffer *frontrb, *backrb;
 464
 465     TRACE;
 466
 467     fb = &drawable->Base;
 468
 469     frontrb =
 470         swrast_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
 471     backrb =
 472         swrast_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
 473
 474     /* check for signle-buffered */
 475     if (backrb == NULL)
 476         return;
 477
 478     /* check if swapping currently bound buffer */
 479     if (ctx && ctx->DrawBuffer == fb) {
 480         /* flush pending rendering */
 481         _mesa_notifySwapBuffers(ctx);
 482     }
 483
 484     sPriv->swrast_loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
 485                                    0, 0,
 486                                    frontrb->Base.Width,
 487                                    frontrb->Base.Height,
 488                                    backrb->Base.Data,
 489                                    dPriv->loaderPrivate);
 490 }
 491
 492
 493 /**
 494  * General device driver functions.
 495  */
 496
 497 static void
 498 get_window_size( struct gl_framebuffer *fb, GLsizei *w, GLsizei *h )
 499 {
 500     __DRIdrawable *dPriv = swrast_drawable(fb)->dPriv;
 501     __DRIscreen *sPriv = dPriv->driScreenPriv;
 502     int x, y;
 503
 504     sPriv->swrast_loader->getDrawableInfo(dPriv,
 505                                           &x, &y, w, h,
 506                                           dPriv->loaderPrivate);
 507 }
 508
 509 static void
 510 swrast_check_and_update_window_size( struct gl_context *ctx, struct gl_framebuffer *fb )
 511 {
 512     GLsizei width, height;
 513
 514     get_window_size(fb, &width, &height);
 515     if (fb->Width != width || fb->Height != height) {
 516         _mesa_resize_framebuffer(ctx, fb, width, height);
 517     }
 518 }
 519
 520 static const GLubyte *
 521 get_string(struct gl_context *ctx, GLenum pname)
 522 {
 523     (void) ctx;
 524     switch (pname) {
 525         case GL_VENDOR:
 526             return (const GLubyte *) "Mesa Project";
 527         case GL_RENDERER:
 528             return (const GLubyte *) "Software Rasterizer";
 529         default:
 530             return NULL;
 531     }
 532 }
 533
 534 static void
 535 update_state( struct gl_context *ctx, GLuint new_state )
 536 {
 537     /* not much to do here - pass it on */
 538     _swrast_InvalidateState( ctx, new_state );
 539     _swsetup_InvalidateState( ctx, new_state );
 540     _vbo_InvalidateState( ctx, new_state );
 541     _tnl_InvalidateState( ctx, new_state );
 542 }
 543
 544 static void
 545 viewport(struct gl_context *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 546 {
 547     struct gl_framebuffer *draw = ctx->WinSysDrawBuffer;
 548     struct gl_framebuffer *read = ctx->WinSysReadBuffer;
 549
 550     (void) x;
 551     (void) y;
 552     (void) w;
 553     (void) h;
 554     swrast_check_and_update_window_size(ctx, draw);
 555     swrast_check_and_update_window_size(ctx, read);
 556 }
 557
 558 static gl_format swrastChooseTextureFormat(struct gl_context * ctx,
 559                                            GLint internalFormat,
 560                                            GLenum format,
 561                                            GLenum type)
 562 {
 563     if (internalFormat == GL_RGB)
 564         return MESA_FORMAT_XRGB8888;
 565     return _mesa_choose_tex_format(ctx, internalFormat, format, type);
 566 }
 567
 568 static void
 569 swrast_init_driver_functions(struct dd_function_table *driver)
 570 {
 571     driver->GetString = get_string;
 572     driver->UpdateState = update_state;
 573     driver->GetBufferSize = NULL;
 574     driver->Viewport = viewport;
 575     driver->ChooseTextureFormat = swrastChooseTextureFormat;
 576 }
 577
 578 static const char *es2_extensions[] = {
 579    /* Used by mesa internally (cf all_mesa_extensions in ../common/utils.c) */
 580    "GL_ARB_draw_buffers",
 581    "GL_ARB_transpose_matrix",
 582    "GL_ARB_window_pos",
 583    "GL_EXT_blend_func_separate",
 584    "GL_EXT_compiled_vertex_array",
 585    "GL_EXT_framebuffer_blit",
 586    "GL_IBM_multimode_draw_arrays",
 587    "GL_MESA_window_pos",
 588    "GL_NV_vertex_program",
 589
 590    /* Required by GLES2 */
 591    "GL_ARB_fragment_program",
 592    "GL_ARB_fragment_shader",
 593    "GL_ARB_shader_objects",
 594    "GL_ARB_texture_cube_map",
 595    "GL_ARB_texture_mirrored_repeat",
 596    "GL_ARB_texture_non_power_of_two",
 597    "GL_ARB_vertex_shader",
 598    "GL_EXT_blend_color",
 599    "GL_EXT_blend_equation_separate",
 600    "GL_EXT_blend_minmax",
 601
 602    /* Optional GLES2 */
 603    "GL_ARB_framebuffer_object",
 604    "GL_EXT_texture_filter_anisotropic",
 605    "GL_ARB_depth_texture",
 606    "GL_EXT_packed_depth_stencil",
 607    "GL_EXT_framebuffer_object",
 608    NULL,
 609 };
 610
 611 static void
 612 InitExtensionsES2(struct gl_context *ctx)
 613 {
 614    int i;
 615
 616    for (i = 0; es2_extensions[i]; i++)
 617       _mesa_enable_extension(ctx, es2_extensions[i]);
 618 }
 619
 620 /**
 621  * Context-related functions.
 622  */
 623
 624 static GLboolean
 625 dri_create_context(gl_api api,
 626                    const struct gl_config * visual,
 627                    __DRIcontext * cPriv, void *sharedContextPrivate)
 628 {
 629     struct dri_context *ctx = NULL;
 630     struct dri_context *share = (struct dri_context *)sharedContextPrivate;
 631     struct gl_context *mesaCtx = NULL;
 632     struct gl_context *sharedCtx = NULL;
 633     struct dd_function_table functions;
 634
 635     TRACE;
 636
 637     ctx = CALLOC_STRUCT(dri_context);
 638     if (ctx == NULL)
 639         goto context_fail;
 640
 641     cPriv->driverPrivate = ctx;
 642     ctx->cPriv = cPriv;
 643
 644     /* build table of device driver functions */
 645     _mesa_init_driver_functions(&functions);
 646     swrast_init_driver_functions(&functions);
 647
 648     if (share) {
 649         sharedCtx = &share->Base;
 650     }
 651
 652     mesaCtx = &ctx->Base;
 653
 654     /* basic context setup */
 655     if (!_mesa_initialize_context(mesaCtx, api, visual, sharedCtx, &functions, (void *) cPriv)) {
 656         goto context_fail;
 657     }
 658
 659     /* do bounds checking to prevent segfaults and server crashes! */
 660     mesaCtx->Const.CheckArrayBounds = GL_TRUE;
 661
 662     /* create module contexts */
 663     _swrast_CreateContext( mesaCtx );
 664     _vbo_CreateContext( mesaCtx );
 665     _tnl_CreateContext( mesaCtx );
 666     _swsetup_CreateContext( mesaCtx );
 667     _swsetup_Wakeup( mesaCtx );
 668
 669     /* use default TCL pipeline */
 670     {
 671        TNLcontext *tnl = TNL_CONTEXT(mesaCtx);
 672        tnl->Driver.RunPipeline = _tnl_run_pipeline;
 673     }
 674
 675     _mesa_meta_init(mesaCtx);
 676     _mesa_enable_sw_extensions(mesaCtx);
 677
 678     switch (api) {
 679     case API_OPENGL:
 680         _mesa_enable_1_3_extensions(mesaCtx);
 681         _mesa_enable_1_4_extensions(mesaCtx);
 682         _mesa_enable_1_5_extensions(mesaCtx);
 683         _mesa_enable_2_0_extensions(mesaCtx);
 684         _mesa_enable_2_1_extensions(mesaCtx);
 685         break;
 686     case API_OPENGLES:
 687         _mesa_enable_1_3_extensions(mesaCtx);
 688         _mesa_enable_1_4_extensions(mesaCtx);
 689         _mesa_enable_1_5_extensions(mesaCtx);
 690
 691         break;
 692     case API_OPENGLES2:
 693         InitExtensionsES2( mesaCtx);
 694         break;
 695     }
 696
 697     return GL_TRUE;
 698
 699 context_fail:
 700
 701     FREE(ctx);
 702
 703     return GL_FALSE;
 704 }
 705
 706 static void
 707 dri_destroy_context(__DRIcontext * cPriv)
 708 {
 709     TRACE;
 710
 711     if (cPriv) {
 712         struct dri_context *ctx = dri_context(cPriv);
 713         struct gl_context *mesaCtx;
 714
 715         mesaCtx = &ctx->Base;
 716
 717         _mesa_meta_free(mesaCtx);
 718         _swsetup_DestroyContext( mesaCtx );
 719         _swrast_DestroyContext( mesaCtx );
 720         _tnl_DestroyContext( mesaCtx );
 721         _vbo_DestroyContext( mesaCtx );
 722         _mesa_destroy_context( mesaCtx );
 723     }
 724 }
 725
 726 static GLboolean
 727 dri_make_current(__DRIcontext * cPriv,
 728                  __DRIdrawable * driDrawPriv,
 729                  __DRIdrawable * driReadPriv)
 730 {
 731     struct gl_context *mesaCtx;
 732     struct gl_framebuffer *mesaDraw;
 733     struct gl_framebuffer *mesaRead;
 734     TRACE;
 735
 736     if (cPriv) {
 737         struct dri_context *ctx = dri_context(cPriv);
 738         struct dri_drawable *draw;
 739         struct dri_drawable *read;
 740
 741         if (!driDrawPriv || !driReadPriv)
 742             return GL_FALSE;
 743
 744         draw = dri_drawable(driDrawPriv);
 745         read = dri_drawable(driReadPriv);
 746         mesaCtx = &ctx->Base;
 747         mesaDraw = &draw->Base;
 748         mesaRead = &read->Base;
 749
 750         /* check for same context and buffer */
 751         if (mesaCtx == _mesa_get_current_context()
 752             && mesaCtx->DrawBuffer == mesaDraw
 753             && mesaCtx->ReadBuffer == mesaRead) {
 754             return GL_TRUE;
 755         }
 756
 757         _glapi_check_multithread();
 758
 759         swrast_check_and_update_window_size(mesaCtx, mesaDraw);
 760         if (mesaRead != mesaDraw)
 761             swrast_check_and_update_window_size(mesaCtx, mesaRead);
 762
 763         _mesa_make_current( mesaCtx,
 764                             mesaDraw,
 765                             mesaRead );
 766     }
 767     else {
 768         /* unbind */
 769         _mesa_make_current( NULL, NULL, NULL );
 770     }
 771
 772     return GL_TRUE;
 773 }
 774
 775 static GLboolean
 776 dri_unbind_context(__DRIcontext * cPriv)
 777 {
 778     TRACE;
 779     (void) cPriv;
 780
 781     /* Unset current context and dispath table */
 782     _mesa_make_current(NULL, NULL, NULL);
 783
 784     return GL_TRUE;
 785 }
 786
 787
 788 const struct __DriverAPIRec driDriverAPI = {
 789     .InitScreen = dri_init_screen,
 790     .DestroyScreen = dri_destroy_screen,
 791     .CreateContext = dri_create_context,
 792     .DestroyContext = dri_destroy_context,
 793     .CreateBuffer = dri_create_buffer,
 794     .DestroyBuffer = dri_destroy_buffer,
 795     .SwapBuffers = dri_swap_buffers,
 796     .MakeCurrent = dri_make_current,
 797     .UnbindContext = dri_unbind_context,
 798 };
 799
 800 /* This is the table of extensions that the loader will dlsym() for. */
 801 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 802     &driCoreExtension.base,
 803     &driSWRastExtension.base,
 804     NULL
 805 };