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  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 /*
  24  * DRI software rasterizer
  25  *
  26  * This is the mesa swrast module packaged into a DRI driver structure.
  27  *
  28  * The front-buffer is allocated by the loader. The loader provides read/write
  29  * callbacks for access to the front-buffer. The driver uses a scratch row for
  30  * front-buffer rendering to avoid repeated calls to the loader.
  31  *
  32  * The back-buffer is allocated by the driver and is private.
  33  */
  34
  35 #include "main/api_exec.h"
  36 #include "main/context.h"
  37 #include "main/extensions.h"
  38 #include "main/formats.h"
  39 #include "main/framebuffer.h"
  40 #include "main/imports.h"
  41 #include "main/renderbuffer.h"
  42 #include "main/version.h"
  43 #include "main/vtxfmt.h"
  44 #include "swrast/swrast.h"
  45 #include "swrast/s_renderbuffer.h"
  46 #include "swrast_setup/swrast_setup.h"
  47 #include "tnl/tnl.h"
  48 #include "tnl/t_context.h"
  49 #include "tnl/t_pipeline.h"
  50 #include "vbo/vbo.h"
  51 #include "drivers/common/driverfuncs.h"
  52 #include "drivers/common/meta.h"
  53 #include "utils.h"
  54
  55 #include "main/teximage.h"
  56 #include "main/texformat.h"
  57 #include "main/texstate.h"
  58
  59 #include "swrast_priv.h"
  60 #include "swrast/s_context.h"
  61
  62
  63 /**
  64  * Screen and config-related functions
  65  */
  66
  67 static void swrastSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
  68                                 GLint texture_format, __DRIdrawable *dPriv)
  69 {
  70     struct dri_context *dri_ctx;
  71     int x, y, w, h;
  72     __DRIscreen *sPriv = dPriv->driScreenPriv;
  73     struct gl_texture_unit *texUnit;
  74     struct gl_texture_object *texObj;
  75     struct gl_texture_image *texImage;
  76     struct swrast_texture_image *swImage;
  77     uint32_t internalFormat;
  78     gl_format texFormat;
  79
  80     dri_ctx = pDRICtx->driverPrivate;
  81
  82     internalFormat = (texture_format == __DRI_TEXTURE_FORMAT_RGB ? 3 : 4);
  83
  84     texUnit = _mesa_get_current_tex_unit(&dri_ctx->Base);
  85     texObj = _mesa_select_tex_object(&dri_ctx->Base, texUnit, target);
  86     texImage = _mesa_get_tex_image(&dri_ctx->Base, texObj, target, 0);
  87     swImage = swrast_texture_image(texImage);
  88
  89     _mesa_lock_texture(&dri_ctx->Base, texObj);
  90
  91     sPriv->swrast_loader->getDrawableInfo(dPriv, &x, &y, &w, &h, dPriv->loaderPrivate);
  92
  93     if (texture_format == __DRI_TEXTURE_FORMAT_RGB)
  94         texFormat = MESA_FORMAT_XRGB8888;
  95     else
  96         texFormat = MESA_FORMAT_ARGB8888;
  97
  98     _mesa_init_teximage_fields(&dri_ctx->Base, texImage,
  99                                w, h, 1, 0, internalFormat, texFormat);
 100
 101     sPriv->swrast_loader->getImage(dPriv, x, y, w, h, (char *)swImage->Buffer,
 102                                    dPriv->loaderPrivate);
 103
 104     _mesa_unlock_texture(&dri_ctx->Base, texObj);
 105 }
 106
 107 static void swrastSetTexBuffer(__DRIcontext *pDRICtx, GLint target,
 108                                __DRIdrawable *dPriv)
 109 {
 110     swrastSetTexBuffer2(pDRICtx, target, __DRI_TEXTURE_FORMAT_RGBA, dPriv);
 111 }
 112
 113 static const __DRItexBufferExtension swrastTexBufferExtension = {
 114     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 115     swrastSetTexBuffer,
 116     swrastSetTexBuffer2,
 117 };
 118
 119 static const __DRIextension *dri_screen_extensions[] = {
 120     &swrastTexBufferExtension.base,
 121     NULL
 122 };
 123
 124 static __DRIconfig **
 125 swrastFillInModes(__DRIscreen *psp,
 126                   unsigned pixel_bits, unsigned depth_bits,
 127                   unsigned stencil_bits, GLboolean have_back_buffer)
 128 {
 129     __DRIconfig **configs;
 130     unsigned depth_buffer_factor;
 131     unsigned back_buffer_factor;
 132     gl_format format;
 133
 134     /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
 135      * support pageflipping at all.
 136      */
 137     static const GLenum back_buffer_modes[] = {
 138         GLX_NONE, GLX_SWAP_UNDEFINED_OML
 139     };
 140
 141     uint8_t depth_bits_array[4];
 142     uint8_t stencil_bits_array[4];
 143     uint8_t msaa_samples_array[1];
 144
 145     (void) psp;
 146     (void) have_back_buffer;
 147
 148     depth_bits_array[0] = 0;
 149     depth_bits_array[1] = 0;
 150     depth_bits_array[2] = depth_bits;
 151     depth_bits_array[3] = depth_bits;
 152
 153     /* Just like with the accumulation buffer, always provide some modes
 154      * with a stencil buffer.
 155      */
 156     stencil_bits_array[0] = 0;
 157     stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;
 158     stencil_bits_array[2] = 0;
 159     stencil_bits_array[3] = (stencil_bits == 0) ? 8 : stencil_bits;
 160
 161     msaa_samples_array[0] = 0;
 162
 163     depth_buffer_factor = 4;
 164     back_buffer_factor = 2;
 165
 166     switch (pixel_bits) {
 167     case 16:
 168         format = MESA_FORMAT_RGB565;
 169         break;
 170     case 24:
 171         format = MESA_FORMAT_XRGB8888;
 172         break;
 173     case 32:
 174         format = MESA_FORMAT_ARGB8888;
 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(format,
 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 **configs16, **configs24, **configs32;
 200
 201     TRACE;
 202
 203     psp->extensions = dri_screen_extensions;
 204
 205     configs16 = swrastFillInModes(psp, 16, 16, 0, 1);
 206     configs24 = swrastFillInModes(psp, 24, 24, 8, 1);
 207     configs32 = swrastFillInModes(psp, 32, 24, 8, 1);
 208
 209     configs24 = driConcatConfigs(configs16, configs24);
 210     configs32 = driConcatConfigs(configs24, configs32);
 211
 212     return (const __DRIconfig **)configs32;
 213 }
 214
 215 static void
 216 dri_destroy_screen(__DRIscreen * sPriv)
 217 {
 218     TRACE;
 219     (void) sPriv;
 220 }
 221
 222
 223 /**
 224  * Framebuffer and renderbuffer-related functions.
 225  */
 226
 227 static GLuint
 228 choose_pixel_format(const struct gl_config *v)
 229 {
 230     int depth = v->rgbBits;
 231
 232     if (depth == 32
 233         && v->redMask   == 0xff0000
 234         && v->greenMask == 0x00ff00
 235         && v->blueMask  == 0x0000ff)
 236         return PF_A8R8G8B8;
 237     else if (depth == 24
 238              && v->redMask   == 0xff0000
 239              && v->greenMask == 0x00ff00
 240              && v->blueMask  == 0x0000ff)
 241         return PF_X8R8G8B8;
 242     else if (depth == 16
 243              && v->redMask   == 0xf800
 244              && v->greenMask == 0x07e0
 245              && v->blueMask  == 0x001f)
 246         return PF_R5G6B5;
 247     else if (depth == 8
 248              && v->redMask   == 0x07
 249              && v->greenMask == 0x38
 250              && v->blueMask  == 0xc0)
 251         return PF_R3G3B2;
 252
 253     _mesa_problem( NULL, "unexpected format in %s", __FUNCTION__ );
 254     return 0;
 255 }
 256
 257 static void
 258 swrast_delete_renderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb)
 259 {
 260     struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 261
 262     TRACE;
 263
 264     free(xrb->Base.Buffer);
 265     _mesa_delete_renderbuffer(ctx, 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 dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 282
 283     TRACE;
 284
 285     (void) ctx;
 286     (void) internalFormat;
 287
 288     xrb->Base.Buffer = NULL;
 289     rb->Width = width;
 290     rb->Height = height;
 291     xrb->pitch = bytes_per_line(width * xrb->bpp, 32);
 292
 293     return GL_TRUE;
 294 }
 295
 296 static GLboolean
 297 swrast_alloc_back_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
 298                           GLenum internalFormat, GLuint width, GLuint height)
 299 {
 300     struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 301
 302     TRACE;
 303
 304     free(xrb->Base.Buffer);
 305
 306     swrast_alloc_front_storage(ctx, rb, internalFormat, width, height);
 307
 308     xrb->Base.Buffer = malloc(height * xrb->pitch);
 309
 310     return GL_TRUE;
 311 }
 312
 313 static struct dri_swrast_renderbuffer *
 314 swrast_new_renderbuffer(const struct gl_config *visual, __DRIdrawable *dPriv,
 315                         GLboolean front)
 316 {
 317     struct dri_swrast_renderbuffer *xrb = calloc(1, sizeof *xrb);
 318     struct gl_renderbuffer *rb;
 319     GLuint pixel_format;
 320
 321     TRACE;
 322
 323     if (!xrb)
 324         return NULL;
 325
 326     rb = &xrb->Base.Base;
 327
 328     _mesa_init_renderbuffer(rb, 0);
 329
 330     pixel_format = choose_pixel_format(visual);
 331
 332     xrb->dPriv = dPriv;
 333     xrb->Base.Base.Delete = swrast_delete_renderbuffer;
 334     if (front) {
 335         rb->AllocStorage = swrast_alloc_front_storage;
 336     }
 337     else {
 338         rb->AllocStorage = swrast_alloc_back_storage;
 339     }
 340
 341     switch (pixel_format) {
 342     case PF_A8R8G8B8:
 343         rb->Format = MESA_FORMAT_ARGB8888;
 344         rb->InternalFormat = GL_RGBA;
 345         rb->_BaseFormat = GL_RGBA;
 346         xrb->bpp = 32;
 347         break;
 348     case PF_X8R8G8B8:
 349         rb->Format = MESA_FORMAT_ARGB8888; /* XXX */
 350         rb->InternalFormat = GL_RGB;
 351         rb->_BaseFormat = GL_RGB;
 352         xrb->bpp = 32;
 353         break;
 354     case PF_R5G6B5:
 355         rb->Format = MESA_FORMAT_RGB565;
 356         rb->InternalFormat = GL_RGB;
 357         rb->_BaseFormat = GL_RGB;
 358         xrb->bpp = 16;
 359         break;
 360     case PF_R3G3B2:
 361         rb->Format = MESA_FORMAT_RGB332;
 362         rb->InternalFormat = GL_RGB;
 363         rb->_BaseFormat = GL_RGB;
 364         xrb->bpp = 8;
 365         break;
 366     default:
 367         free(xrb);
 368         return NULL;
 369     }
 370
 371     return xrb;
 372 }
 373
 374 static void
 375 swrast_map_renderbuffer(struct gl_context *ctx,
 376                         struct gl_renderbuffer *rb,
 377                         GLuint x, GLuint y, GLuint w, GLuint h,
 378                         GLbitfield mode,
 379                         GLubyte **out_map,
 380                         GLint *out_stride)
 381 {
 382    struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 383    GLubyte *map = xrb->Base.Buffer;
 384    int cpp = _mesa_get_format_bytes(rb->Format);
 385    int stride = rb->Width * cpp;
 386
 387    if (rb->AllocStorage == swrast_alloc_front_storage) {
 388       __DRIdrawable *dPriv = xrb->dPriv;
 389       __DRIscreen *sPriv = dPriv->driScreenPriv;
 390
 391       xrb->map_mode = mode;
 392       xrb->map_x = x;
 393       xrb->map_y = y;
 394       xrb->map_w = w;
 395       xrb->map_h = h;
 396
 397       stride = w * cpp;
 398       xrb->Base.Buffer = malloc(h * stride);
 399
 400       sPriv->swrast_loader->getImage(dPriv, x, y, w, h,
 401                                      (char *) xrb->Base.Buffer,
 402                                      dPriv->loaderPrivate);
 403
 404       *out_map = xrb->Base.Buffer;
 405       *out_stride = stride;
 406       return;
 407    }
 408
 409    ASSERT(xrb->Base.Buffer);
 410
 411    if (rb->AllocStorage == swrast_alloc_back_storage) {
 412       map += (rb->Height - 1) * stride;
 413       stride = -stride;
 414    }
 415
 416    map += (GLsizei)y * stride;
 417    map += (GLsizei)x * cpp;
 418
 419    *out_map = map;
 420    *out_stride = stride;
 421 }
 422
 423 static void
 424 swrast_unmap_renderbuffer(struct gl_context *ctx,
 425                           struct gl_renderbuffer *rb)
 426 {
 427    struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 428
 429    if (rb->AllocStorage == swrast_alloc_front_storage) {
 430       __DRIdrawable *dPriv = xrb->dPriv;
 431       __DRIscreen *sPriv = dPriv->driScreenPriv;
 432
 433       if (xrb->map_mode & GL_MAP_WRITE_BIT) {
 434          sPriv->swrast_loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_DRAW,
 435                                         xrb->map_x, xrb->map_y,
 436                                         xrb->map_w, xrb->map_h,
 437                                         (char *) xrb->Base.Buffer,
 438                                         dPriv->loaderPrivate);
 439       }
 440
 441       free(xrb->Base.Buffer);
 442       xrb->Base.Buffer = NULL;
 443    }
 444 }
 445
 446 static GLboolean
 447 dri_create_buffer(__DRIscreen * sPriv,
 448                   __DRIdrawable * dPriv,
 449                   const struct gl_config * visual, GLboolean isPixmap)
 450 {
 451     struct dri_drawable *drawable = NULL;
 452     struct gl_framebuffer *fb;
 453     struct dri_swrast_renderbuffer *frontrb, *backrb;
 454
 455     TRACE;
 456
 457     (void) sPriv;
 458     (void) isPixmap;
 459
 460     drawable = CALLOC_STRUCT(dri_drawable);
 461     if (drawable == NULL)
 462         goto drawable_fail;
 463
 464     dPriv->driverPrivate = drawable;
 465     drawable->dPriv = dPriv;
 466
 467     drawable->row = malloc(SWRAST_MAX_WIDTH * 4);
 468     if (drawable->row == NULL)
 469         goto drawable_fail;
 470
 471     fb = &drawable->Base;
 472
 473     /* basic framebuffer setup */
 474     _mesa_initialize_window_framebuffer(fb, visual);
 475
 476     /* add front renderbuffer */
 477     frontrb = swrast_new_renderbuffer(visual, dPriv, GL_TRUE);
 478     _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontrb->Base.Base);
 479
 480     /* add back renderbuffer */
 481     if (visual->doubleBufferMode) {
 482         backrb = swrast_new_renderbuffer(visual, dPriv, GL_FALSE);
 483         _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backrb->Base.Base);
 484     }
 485
 486     /* add software renderbuffers */
 487     _swrast_add_soft_renderbuffers(fb,
 488                                    GL_FALSE, /* color */
 489                                    visual->haveDepthBuffer,
 490                                    visual->haveStencilBuffer,
 491                                    visual->haveAccumBuffer,
 492                                    GL_FALSE, /* alpha */
 493                                    GL_FALSE /* aux bufs */);
 494
 495     return GL_TRUE;
 496
 497 drawable_fail:
 498
 499     if (drawable)
 500         free(drawable->row);
 501
 502     free(drawable);
 503
 504     return GL_FALSE;
 505 }
 506
 507 static void
 508 dri_destroy_buffer(__DRIdrawable * dPriv)
 509 {
 510     TRACE;
 511
 512     if (dPriv) {
 513         struct dri_drawable *drawable = dri_drawable(dPriv);
 514         struct gl_framebuffer *fb;
 515
 516         free(drawable->row);
 517
 518         fb = &drawable->Base;
 519
 520         fb->DeletePending = GL_TRUE;
 521         _mesa_reference_framebuffer(&fb, NULL);
 522     }
 523 }
 524
 525 static void
 526 dri_swap_buffers(__DRIdrawable * dPriv)
 527 {
 528     __DRIscreen *sPriv = dPriv->driScreenPriv;
 529
 530     GET_CURRENT_CONTEXT(ctx);
 531
 532     struct dri_drawable *drawable = dri_drawable(dPriv);
 533     struct gl_framebuffer *fb;
 534     struct dri_swrast_renderbuffer *frontrb, *backrb;
 535
 536     TRACE;
 537
 538     fb = &drawable->Base;
 539
 540     frontrb =
 541         dri_swrast_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
 542     backrb =
 543         dri_swrast_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
 544
 545     /* check for signle-buffered */
 546     if (backrb == NULL)
 547         return;
 548
 549     /* check if swapping currently bound buffer */
 550     if (ctx && ctx->DrawBuffer == fb) {
 551         /* flush pending rendering */
 552         _mesa_notifySwapBuffers(ctx);
 553     }
 554
 555     sPriv->swrast_loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
 556                                    0, 0,
 557                                    frontrb->Base.Base.Width,
 558                                    frontrb->Base.Base.Height,
 559                                    (char *) backrb->Base.Buffer,
 560                                    dPriv->loaderPrivate);
 561 }
 562
 563
 564 /**
 565  * General device driver functions.
 566  */
 567
 568 static void
 569 get_window_size( struct gl_framebuffer *fb, GLsizei *w, GLsizei *h )
 570 {
 571     __DRIdrawable *dPriv = swrast_drawable(fb)->dPriv;
 572     __DRIscreen *sPriv = dPriv->driScreenPriv;
 573     int x, y;
 574
 575     sPriv->swrast_loader->getDrawableInfo(dPriv,
 576                                           &x, &y, w, h,
 577                                           dPriv->loaderPrivate);
 578 }
 579
 580 static void
 581 swrast_check_and_update_window_size( struct gl_context *ctx, struct gl_framebuffer *fb )
 582 {
 583     GLsizei width, height;
 584
 585     get_window_size(fb, &width, &height);
 586     if (fb->Width != width || fb->Height != height) {
 587         _mesa_resize_framebuffer(ctx, fb, width, height);
 588     }
 589 }
 590
 591 static const GLubyte *
 592 get_string(struct gl_context *ctx, GLenum pname)
 593 {
 594     (void) ctx;
 595     switch (pname) {
 596         case GL_VENDOR:
 597             return (const GLubyte *) "Mesa Project";
 598         case GL_RENDERER:
 599             return (const GLubyte *) "Software Rasterizer";
 600         default:
 601             return NULL;
 602     }
 603 }
 604
 605 static void
 606 update_state( struct gl_context *ctx, GLuint new_state )
 607 {
 608     /* not much to do here - pass it on */
 609     _swrast_InvalidateState( ctx, new_state );
 610     _swsetup_InvalidateState( ctx, new_state );
 611     _vbo_InvalidateState( ctx, new_state );
 612     _tnl_InvalidateState( ctx, new_state );
 613 }
 614
 615 static void
 616 viewport(struct gl_context *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 617 {
 618     struct gl_framebuffer *draw = ctx->WinSysDrawBuffer;
 619     struct gl_framebuffer *read = ctx->WinSysReadBuffer;
 620
 621     (void) x;
 622     (void) y;
 623     (void) w;
 624     (void) h;
 625     swrast_check_and_update_window_size(ctx, draw);
 626     swrast_check_and_update_window_size(ctx, read);
 627 }
 628
 629 static gl_format swrastChooseTextureFormat(struct gl_context * ctx,
 630                                            GLenum target,
 631                                            GLint internalFormat,
 632                                            GLenum format,
 633                                            GLenum type)
 634 {
 635     if (internalFormat == GL_RGB)
 636         return MESA_FORMAT_XRGB8888;
 637     return _mesa_choose_tex_format(ctx, target, internalFormat, format, type);
 638 }
 639
 640 static void
 641 swrast_init_driver_functions(struct dd_function_table *driver)
 642 {
 643     driver->GetString = get_string;
 644     driver->UpdateState = update_state;
 645     driver->GetBufferSize = NULL;
 646     driver->Viewport = viewport;
 647     driver->ChooseTextureFormat = swrastChooseTextureFormat;
 648     driver->MapRenderbuffer = swrast_map_renderbuffer;
 649     driver->UnmapRenderbuffer = swrast_unmap_renderbuffer;
 650 }
 651
 652 static const char *es2_extensions[] = {
 653    /* Used by mesa internally (cf all_mesa_extensions in ../common/utils.c) */
 654    "GL_EXT_blend_func_separate",
 655    "GL_EXT_framebuffer_blit",
 656    "GL_MESA_window_pos",
 657
 658    /* Required by GLES2 */
 659    "GL_ARB_fragment_program",
 660    "GL_ARB_fragment_shader",
 661    "GL_ARB_shader_objects",
 662    "GL_ARB_texture_cube_map",
 663    "GL_ARB_texture_non_power_of_two",
 664    "GL_ARB_vertex_shader",
 665    "GL_EXT_blend_color",
 666    "GL_EXT_blend_equation_separate",
 667    "GL_EXT_blend_minmax",
 668
 669    /* Optional GLES2 */
 670    "GL_ARB_framebuffer_object",
 671    "GL_EXT_texture_filter_anisotropic",
 672    "GL_ARB_depth_texture",
 673    "GL_EXT_packed_depth_stencil",
 674    "GL_EXT_framebuffer_object",
 675    NULL,
 676 };
 677
 678 static void
 679 InitExtensionsES2(struct gl_context *ctx)
 680 {
 681    int i;
 682
 683    for (i = 0; es2_extensions[i]; i++)
 684       _mesa_enable_extension(ctx, es2_extensions[i]);
 685 }
 686
 687 /**
 688  * Context-related functions.
 689  */
 690
 691 static GLboolean
 692 dri_create_context(gl_api api,
 693                    const struct gl_config * visual,
 694                    __DRIcontext * cPriv,
 695                    unsigned major_version,
 696                    unsigned minor_version,
 697                    uint32_t flags,
 698                    unsigned *error,
 699                    void *sharedContextPrivate)
 700 {
 701     struct dri_context *ctx = NULL;
 702     struct dri_context *share = (struct dri_context *)sharedContextPrivate;
 703     struct gl_context *mesaCtx = NULL;
 704     struct gl_context *sharedCtx = NULL;
 705     struct dd_function_table functions;
 706
 707     TRACE;
 708
 709     /* Flag filtering is handled in dri2CreateContextAttribs.
 710      */
 711     (void) flags;
 712
 713     switch (api) {
 714     case API_OPENGL_COMPAT:
 715         if (major_version > 2
 716             || (major_version == 2 && minor_version > 1)) {
 717             *error = __DRI_CTX_ERROR_BAD_VERSION;
 718             return GL_FALSE;
 719         }
 720         break;
 721     case API_OPENGLES:
 722     case API_OPENGLES2:
 723         break;
 724     case API_OPENGL_CORE:
 725         *error = __DRI_CTX_ERROR_BAD_API;
 726         return GL_FALSE;
 727     }
 728
 729     ctx = CALLOC_STRUCT(dri_context);
 730     if (ctx == NULL) {
 731         *error = __DRI_CTX_ERROR_NO_MEMORY;
 732         goto context_fail;
 733     }
 734
 735     cPriv->driverPrivate = ctx;
 736     ctx->cPriv = cPriv;
 737
 738     /* build table of device driver functions */
 739     _mesa_init_driver_functions(&functions);
 740     swrast_init_driver_functions(&functions);
 741
 742     if (share) {
 743         sharedCtx = &share->Base;
 744     }
 745
 746     mesaCtx = &ctx->Base;
 747
 748     /* basic context setup */
 749     if (!_mesa_initialize_context(mesaCtx, api, visual, sharedCtx, &functions)) {
 750         *error = __DRI_CTX_ERROR_NO_MEMORY;
 751         goto context_fail;
 752     }
 753
 754     /* do bounds checking to prevent segfaults and server crashes! */
 755     mesaCtx->Const.CheckArrayBounds = GL_TRUE;
 756
 757     /* create module contexts */
 758     _swrast_CreateContext( mesaCtx );
 759     _vbo_CreateContext( mesaCtx );
 760     _tnl_CreateContext( mesaCtx );
 761     _swsetup_CreateContext( mesaCtx );
 762     _swsetup_Wakeup( mesaCtx );
 763
 764     /* use default TCL pipeline */
 765     {
 766        TNLcontext *tnl = TNL_CONTEXT(mesaCtx);
 767        tnl->Driver.RunPipeline = _tnl_run_pipeline;
 768     }
 769
 770     _mesa_meta_init(mesaCtx);
 771     _mesa_enable_sw_extensions(mesaCtx);
 772
 773     switch (api) {
 774     case API_OPENGL_CORE:
 775         /* XXX fix me, fall-through for now */
 776     case API_OPENGL_COMPAT:
 777         _mesa_enable_1_3_extensions(mesaCtx);
 778         _mesa_enable_1_4_extensions(mesaCtx);
 779         _mesa_enable_1_5_extensions(mesaCtx);
 780         _mesa_enable_2_0_extensions(mesaCtx);
 781         _mesa_enable_2_1_extensions(mesaCtx);
 782         break;
 783     case API_OPENGLES:
 784         _mesa_enable_1_3_extensions(mesaCtx);
 785         _mesa_enable_1_4_extensions(mesaCtx);
 786         _mesa_enable_1_5_extensions(mesaCtx);
 787
 788         break;
 789     case API_OPENGLES2:
 790         InitExtensionsES2( mesaCtx);
 791         break;
 792     }
 793
 794     _mesa_compute_version(mesaCtx);
 795
 796     _mesa_initialize_dispatch_tables(mesaCtx);
 797     _mesa_initialize_vbo_vtxfmt(mesaCtx);
 798
 799     *error = __DRI_CTX_ERROR_SUCCESS;
 800     return GL_TRUE;
 801
 802 context_fail:
 803
 804     free(ctx);
 805
 806     return GL_FALSE;
 807 }
 808
 809 static void
 810 dri_destroy_context(__DRIcontext * cPriv)
 811 {
 812     TRACE;
 813
 814     if (cPriv) {
 815         struct dri_context *ctx = dri_context(cPriv);
 816         struct gl_context *mesaCtx;
 817
 818         mesaCtx = &ctx->Base;
 819
 820         _mesa_meta_free(mesaCtx);
 821         _swsetup_DestroyContext( mesaCtx );
 822         _swrast_DestroyContext( mesaCtx );
 823         _tnl_DestroyContext( mesaCtx );
 824         _vbo_DestroyContext( mesaCtx );
 825         _mesa_destroy_context( mesaCtx );
 826     }
 827 }
 828
 829 static GLboolean
 830 dri_make_current(__DRIcontext * cPriv,
 831                  __DRIdrawable * driDrawPriv,
 832                  __DRIdrawable * driReadPriv)
 833 {
 834     struct gl_context *mesaCtx;
 835     struct gl_framebuffer *mesaDraw;
 836     struct gl_framebuffer *mesaRead;
 837     TRACE;
 838
 839     if (cPriv) {
 840         struct dri_context *ctx = dri_context(cPriv);
 841         struct dri_drawable *draw;
 842         struct dri_drawable *read;
 843
 844         if (!driDrawPriv || !driReadPriv)
 845             return GL_FALSE;
 846
 847         draw = dri_drawable(driDrawPriv);
 848         read = dri_drawable(driReadPriv);
 849         mesaCtx = &ctx->Base;
 850         mesaDraw = &draw->Base;
 851         mesaRead = &read->Base;
 852
 853         /* check for same context and buffer */
 854         if (mesaCtx == _mesa_get_current_context()
 855             && mesaCtx->DrawBuffer == mesaDraw
 856             && mesaCtx->ReadBuffer == mesaRead) {
 857             return GL_TRUE;
 858         }
 859
 860         _glapi_check_multithread();
 861
 862         swrast_check_and_update_window_size(mesaCtx, mesaDraw);
 863         if (mesaRead != mesaDraw)
 864             swrast_check_and_update_window_size(mesaCtx, mesaRead);
 865
 866         _mesa_make_current( mesaCtx,
 867                             mesaDraw,
 868                             mesaRead );
 869     }
 870     else {
 871         /* unbind */
 872         _mesa_make_current( NULL, NULL, NULL );
 873     }
 874
 875     return GL_TRUE;
 876 }
 877
 878 static GLboolean
 879 dri_unbind_context(__DRIcontext * cPriv)
 880 {
 881     TRACE;
 882     (void) cPriv;
 883
 884     /* Unset current context and dispath table */
 885     _mesa_make_current(NULL, NULL, NULL);
 886
 887     return GL_TRUE;
 888 }
 889
 890
 891 const struct __DriverAPIRec driDriverAPI = {
 892     .InitScreen = dri_init_screen,
 893     .DestroyScreen = dri_destroy_screen,
 894     .CreateContext = dri_create_context,
 895     .DestroyContext = dri_destroy_context,
 896     .CreateBuffer = dri_create_buffer,
 897     .DestroyBuffer = dri_destroy_buffer,
 898     .SwapBuffers = dri_swap_buffers,
 899     .MakeCurrent = dri_make_current,
 900     .UnbindContext = dri_unbind_context,
 901 };
 902
 903 /* This is the table of extensions that the loader will dlsym() for. */
 904 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 905     &driCoreExtension.base,
 906     &driSWRastExtension.base,
 907     NULL
 908 };