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 <stdio.h>
  36 #include "main/api_exec.h"
  37 #include "main/context.h"
  38 #include "main/extensions.h"
  39 #include "main/formats.h"
  40 #include "main/framebuffer.h"
  41 #include "main/imports.h"
  42 #include "main/renderbuffer.h"
  43 #include "main/version.h"
  44 #include "main/vtxfmt.h"
  45 #include "swrast/swrast.h"
  46 #include "swrast/s_renderbuffer.h"
  47 #include "swrast_setup/swrast_setup.h"
  48 #include "tnl/tnl.h"
  49 #include "tnl/t_context.h"
  50 #include "tnl/t_pipeline.h"
  51 #include "vbo/vbo.h"
  52 #include "drivers/common/driverfuncs.h"
  53 #include "drivers/common/meta.h"
  54 #include "utils.h"
  55
  56 #include "main/teximage.h"
  57 #include "main/texformat.h"
  58 #include "main/texobj.h"
  59 #include "main/texstate.h"
  60
  61 #include "swrast_priv.h"
  62 #include "swrast/s_context.h"
  63
  64 #include <sys/types.h>
  65 #ifdef HAVE_SYS_SYSCTL_H
  66 # include <sys/sysctl.h>
  67 #endif
  68
  69 const __DRIextension **__driDriverGetExtensions_swrast(void);
  70
  71 const char * const swrast_vendor_string = "Mesa Project";
  72 const char * const swrast_renderer_string = "Software Rasterizer";
  73
  74 /**
  75  * Screen and config-related functions
  76  */
  77
  78 static void swrastSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
  79                                 GLint texture_format, __DRIdrawable *dPriv)
  80 {
  81     struct dri_context *dri_ctx;
  82     int x, y, w, h;
  83     __DRIscreen *sPriv = dPriv->driScreenPriv;
  84     struct gl_texture_object *texObj;
  85     struct gl_texture_image *texImage;
  86     struct swrast_texture_image *swImage;
  87     uint32_t internalFormat;
  88     mesa_format texFormat;
  89
  90     dri_ctx = pDRICtx->driverPrivate;
  91
  92     internalFormat = (texture_format == __DRI_TEXTURE_FORMAT_RGB ? 3 : 4);
  93
  94     texObj = _mesa_get_current_tex_object(&dri_ctx->Base, target);
  95     texImage = _mesa_get_tex_image(&dri_ctx->Base, texObj, target, 0);
  96     swImage = swrast_texture_image(texImage);
  97
  98     _mesa_lock_texture(&dri_ctx->Base, texObj);
  99
 100     sPriv->swrast_loader->getDrawableInfo(dPriv, &x, &y, &w, &h, dPriv->loaderPrivate);
 101
 102     if (texture_format == __DRI_TEXTURE_FORMAT_RGB)
 103         texFormat = MESA_FORMAT_B8G8R8X8_UNORM;
 104     else
 105         texFormat = MESA_FORMAT_B8G8R8A8_UNORM;
 106
 107     _mesa_init_teximage_fields(&dri_ctx->Base, texImage,
 108                                w, h, 1, 0, internalFormat, texFormat);
 109
 110     sPriv->swrast_loader->getImage(dPriv, x, y, w, h, (char *)swImage->Buffer,
 111                                    dPriv->loaderPrivate);
 112
 113     _mesa_unlock_texture(&dri_ctx->Base, texObj);
 114 }
 115
 116 static void swrastSetTexBuffer(__DRIcontext *pDRICtx, GLint target,
 117                                __DRIdrawable *dPriv)
 118 {
 119     swrastSetTexBuffer2(pDRICtx, target, __DRI_TEXTURE_FORMAT_RGBA, dPriv);
 120 }
 121
 122 static const __DRItexBufferExtension swrastTexBufferExtension = {
 123    .base = { __DRI_TEX_BUFFER, 3 },
 124
 125    .setTexBuffer        = swrastSetTexBuffer,
 126    .setTexBuffer2       = swrastSetTexBuffer2,
 127    .releaseTexBuffer    = NULL,
 128 };
 129
 130
 131 static int
 132 swrast_query_renderer_integer(__DRIscreen *psp, int param,
 133                                unsigned int *value)
 134 {
 135    switch (param) {
 136    case __DRI2_RENDERER_VENDOR_ID:
 137    case __DRI2_RENDERER_DEVICE_ID:
 138       /* Return 0xffffffff for both vendor and device id */
 139       value[0] = 0xffffffff;
 140       return 0;
 141    case __DRI2_RENDERER_ACCELERATED:
 142       value[0] = 0;
 143       return 0;
 144    case __DRI2_RENDERER_VIDEO_MEMORY: {
 145       /* This should probably share code with os_get_total_physical_memory()
 146        * from src/gallium/auxiliary/os/os_misc.c
 147        */
 148 #if defined(CTL_HW) && defined(HW_MEMSIZE)
 149         int mib[2] = { CTL_HW, HW_MEMSIZE };
 150         unsigned long system_memory_bytes;
 151         size_t len = sizeof(system_memory_bytes);
 152         if (sysctl(mib, 2, &system_memory_bytes, &len, NULL, 0) != 0)
 153             return -1;
 154 #elif defined(_SC_PHYS_PAGES) && defined(_SC_PAGE_SIZE)
 155       /* XXX: Do we want to return the full amount of system memory ? */
 156       const long system_memory_pages = sysconf(_SC_PHYS_PAGES);
 157       const long system_page_size = sysconf(_SC_PAGE_SIZE);
 158
 159       if (system_memory_pages <= 0 || system_page_size <= 0)
 160          return -1;
 161
 162       const uint64_t system_memory_bytes = (uint64_t) system_memory_pages
 163          * (uint64_t) system_page_size;
 164 #else
 165 #error "Unsupported platform"
 166 #endif
 167
 168       const unsigned system_memory_megabytes =
 169          (unsigned) (system_memory_bytes / (1024 * 1024));
 170
 171       value[0] = system_memory_megabytes;
 172       return 0;
 173    }
 174    case __DRI2_RENDERER_UNIFIED_MEMORY_ARCHITECTURE:
 175       /**
 176        * XXX: Perhaps we should return 1 ?
 177        * See issue #7 from the spec, currently UNRESOLVED.
 178        */
 179       value[0] = 0;
 180       return 0;
 181    default:
 182       return driQueryRendererIntegerCommon(psp, param, value);
 183    }
 184 }
 185
 186 static int
 187 swrast_query_renderer_string(__DRIscreen *psp, int param, const char **value)
 188 {
 189    switch (param) {
 190    case __DRI2_RENDERER_VENDOR_ID:
 191       value[0] = swrast_vendor_string;
 192       return 0;
 193    case __DRI2_RENDERER_DEVICE_ID:
 194       value[0] = swrast_renderer_string;
 195       return 0;
 196    default:
 197       return -1;
 198    }
 199 }
 200
 201 static const __DRI2rendererQueryExtension swrast_query_renderer_extension = {
 202    .base = { __DRI2_RENDERER_QUERY, 1 },
 203
 204    .queryInteger        = swrast_query_renderer_integer,
 205    .queryString         = swrast_query_renderer_string
 206 };
 207
 208 static const __DRIextension *dri_screen_extensions[] = {
 209     &swrastTexBufferExtension.base,
 210     &swrast_query_renderer_extension.base,
 211     &dri2ConfigQueryExtension.base,
 212     &dri2NoErrorExtension.base,
 213     NULL
 214 };
 215
 216 static __DRIconfig **
 217 swrastFillInModes(__DRIscreen *psp,
 218                   unsigned pixel_bits, unsigned depth_bits,
 219                   unsigned stencil_bits, GLboolean have_back_buffer)
 220 {
 221     __DRIconfig **configs;
 222     unsigned depth_buffer_factor;
 223     unsigned back_buffer_factor;
 224     mesa_format format;
 225
 226     static const GLenum back_buffer_modes[] = {
 227         __DRI_ATTRIB_SWAP_NONE, __DRI_ATTRIB_SWAP_UNDEFINED
 228     };
 229
 230     uint8_t depth_bits_array[4];
 231     uint8_t stencil_bits_array[4];
 232     uint8_t msaa_samples_array[1];
 233
 234     (void) psp;
 235     (void) have_back_buffer;
 236
 237     depth_bits_array[0] = 0;
 238     depth_bits_array[1] = 0;
 239     depth_bits_array[2] = depth_bits;
 240     depth_bits_array[3] = depth_bits;
 241
 242     /* Just like with the accumulation buffer, always provide some modes
 243      * with a stencil buffer.
 244      */
 245     stencil_bits_array[0] = 0;
 246     stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;
 247     stencil_bits_array[2] = 0;
 248     stencil_bits_array[3] = (stencil_bits == 0) ? 8 : stencil_bits;
 249
 250     msaa_samples_array[0] = 0;
 251
 252     depth_buffer_factor = 4;
 253     back_buffer_factor = 2;
 254
 255     switch (pixel_bits) {
 256     case 16:
 257         format = MESA_FORMAT_B5G6R5_UNORM;
 258         break;
 259     case 24:
 260         format = MESA_FORMAT_B8G8R8X8_UNORM;
 261         break;
 262     case 32:
 263         format = MESA_FORMAT_B8G8R8A8_UNORM;
 264         break;
 265     default:
 266         fprintf(stderr, "[%s:%u] bad depth %d\n", __func__, __LINE__,
 267                 pixel_bits);
 268         return NULL;
 269     }
 270
 271     configs = driCreateConfigs(format,
 272                                depth_bits_array, stencil_bits_array,
 273                                depth_buffer_factor, back_buffer_modes,
 274                                back_buffer_factor, msaa_samples_array, 1,
 275                                GL_TRUE, GL_FALSE);
 276     if (configs == NULL) {
 277         fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 278                 __LINE__);
 279         return NULL;
 280     }
 281
 282     return configs;
 283 }
 284
 285 static const __DRIconfig **
 286 dri_init_screen(__DRIscreen * psp)
 287 {
 288     __DRIconfig **configs16, **configs24, **configs32;
 289
 290     TRACE;
 291
 292     psp->max_gl_compat_version = 21;
 293     psp->max_gl_es1_version = 11;
 294     psp->max_gl_es2_version = 20;
 295
 296     psp->extensions = dri_screen_extensions;
 297
 298     configs16 = swrastFillInModes(psp, 16, 16, 0, 1);
 299     configs24 = swrastFillInModes(psp, 24, 24, 8, 1);
 300     configs32 = swrastFillInModes(psp, 32, 24, 8, 1);
 301
 302     configs24 = driConcatConfigs(configs16, configs24);
 303     configs32 = driConcatConfigs(configs24, configs32);
 304
 305     return (const __DRIconfig **)configs32;
 306 }
 307
 308 static void
 309 dri_destroy_screen(__DRIscreen * sPriv)
 310 {
 311     TRACE;
 312     (void) sPriv;
 313 }
 314
 315
 316 /**
 317  * Framebuffer and renderbuffer-related functions.
 318  */
 319
 320 static GLuint
 321 choose_pixel_format(const struct gl_config *v)
 322 {
 323     int depth = v->rgbBits;
 324
 325     if (depth == 32
 326         && v->redMask   == 0xff0000
 327         && v->greenMask == 0x00ff00
 328         && v->blueMask  == 0x0000ff)
 329         return PF_A8R8G8B8;
 330     else if (depth == 24
 331              && v->redMask   == 0xff0000
 332              && v->greenMask == 0x00ff00
 333              && v->blueMask  == 0x0000ff)
 334         return PF_X8R8G8B8;
 335     else if (depth == 16
 336              && v->redMask   == 0xf800
 337              && v->greenMask == 0x07e0
 338              && v->blueMask  == 0x001f)
 339         return PF_R5G6B5;
 340     else if (depth == 8
 341              && v->redMask   == 0x07
 342              && v->greenMask == 0x38
 343              && v->blueMask  == 0xc0)
 344         return PF_R3G3B2;
 345
 346     _mesa_problem( NULL, "unexpected format in %s", __func__ );
 347     return 0;
 348 }
 349
 350 static void
 351 swrast_delete_renderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb)
 352 {
 353     struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 354
 355     TRACE;
 356
 357     free(xrb->Base.Buffer);
 358     _mesa_delete_renderbuffer(ctx, rb);
 359 }
 360
 361 /* see bytes_per_line in libGL */
 362 static inline int
 363 bytes_per_line(unsigned pitch_bits, unsigned mul)
 364 {
 365    unsigned mask = mul - 1;
 366
 367    return ((pitch_bits + mask) & ~mask) / 8;
 368 }
 369
 370 static GLboolean
 371 swrast_alloc_front_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
 372                            GLenum internalFormat, GLuint width, GLuint height)
 373 {
 374     struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 375
 376     TRACE;
 377
 378     (void) ctx;
 379     (void) internalFormat;
 380
 381     xrb->Base.Buffer = NULL;
 382     rb->Width = width;
 383     rb->Height = height;
 384     xrb->pitch = bytes_per_line(width * xrb->bpp, 32);
 385
 386     return GL_TRUE;
 387 }
 388
 389 static GLboolean
 390 swrast_alloc_back_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
 391                           GLenum internalFormat, GLuint width, GLuint height)
 392 {
 393     struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 394
 395     TRACE;
 396
 397     free(xrb->Base.Buffer);
 398
 399     swrast_alloc_front_storage(ctx, rb, internalFormat, width, height);
 400
 401     xrb->Base.Buffer = malloc(height * xrb->pitch);
 402
 403     return GL_TRUE;
 404 }
 405
 406 static struct dri_swrast_renderbuffer *
 407 swrast_new_renderbuffer(const struct gl_config *visual, __DRIdrawable *dPriv,
 408                         GLboolean front)
 409 {
 410     struct dri_swrast_renderbuffer *xrb = calloc(1, sizeof *xrb);
 411     struct gl_renderbuffer *rb;
 412     GLuint pixel_format;
 413
 414     TRACE;
 415
 416     if (!xrb)
 417         return NULL;
 418
 419     rb = &xrb->Base.Base;
 420
 421     _mesa_init_renderbuffer(rb, 0);
 422
 423     pixel_format = choose_pixel_format(visual);
 424
 425     xrb->dPriv = dPriv;
 426     xrb->Base.Base.Delete = swrast_delete_renderbuffer;
 427     if (front) {
 428         rb->AllocStorage = swrast_alloc_front_storage;
 429     }
 430     else {
 431         rb->AllocStorage = swrast_alloc_back_storage;
 432     }
 433
 434     switch (pixel_format) {
 435     case PF_A8R8G8B8:
 436         rb->Format = MESA_FORMAT_B8G8R8A8_UNORM;
 437         rb->InternalFormat = GL_RGBA;
 438         rb->_BaseFormat = GL_RGBA;
 439         xrb->bpp = 32;
 440         break;
 441     case PF_X8R8G8B8:
 442         rb->Format = MESA_FORMAT_B8G8R8A8_UNORM; /* XXX */
 443         rb->InternalFormat = GL_RGB;
 444         rb->_BaseFormat = GL_RGB;
 445         xrb->bpp = 32;
 446         break;
 447     case PF_R5G6B5:
 448         rb->Format = MESA_FORMAT_B5G6R5_UNORM;
 449         rb->InternalFormat = GL_RGB;
 450         rb->_BaseFormat = GL_RGB;
 451         xrb->bpp = 16;
 452         break;
 453     case PF_R3G3B2:
 454         rb->Format = MESA_FORMAT_B2G3R3_UNORM;
 455         rb->InternalFormat = GL_RGB;
 456         rb->_BaseFormat = GL_RGB;
 457         xrb->bpp = 8;
 458         break;
 459     default:
 460         free(xrb);
 461         return NULL;
 462     }
 463
 464     return xrb;
 465 }
 466
 467 static void
 468 swrast_map_renderbuffer(struct gl_context *ctx,
 469                         struct gl_renderbuffer *rb,
 470                         GLuint x, GLuint y, GLuint w, GLuint h,
 471                         GLbitfield mode,
 472                         GLubyte **out_map,
 473                         GLint *out_stride)
 474 {
 475    struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 476    GLubyte *map = xrb->Base.Buffer;
 477    int cpp = _mesa_get_format_bytes(rb->Format);
 478    int stride = rb->Width * cpp;
 479
 480    if (rb->AllocStorage == swrast_alloc_front_storage) {
 481       __DRIdrawable *dPriv = xrb->dPriv;
 482       __DRIscreen *sPriv = dPriv->driScreenPriv;
 483
 484       xrb->map_mode = mode;
 485       xrb->map_x = x;
 486       xrb->map_y = rb->Height - y - h;
 487       xrb->map_w = w;
 488       xrb->map_h = h;
 489
 490       stride = w * cpp;
 491       xrb->Base.Buffer = malloc(h * stride);
 492
 493       sPriv->swrast_loader->getImage(dPriv, x, xrb->map_y, w, h,
 494                                      (char *) xrb->Base.Buffer,
 495                                      dPriv->loaderPrivate);
 496
 497       *out_map = xrb->Base.Buffer + (h - 1) * stride;
 498       *out_stride = -stride;
 499       return;
 500    }
 501
 502    assert(xrb->Base.Buffer);
 503
 504    if (rb->AllocStorage == swrast_alloc_back_storage) {
 505       map += (rb->Height - 1) * stride;
 506       stride = -stride;
 507    }
 508
 509    map += (GLsizei)y * stride;
 510    map += (GLsizei)x * cpp;
 511
 512    *out_map = map;
 513    *out_stride = stride;
 514 }
 515
 516 static void
 517 swrast_unmap_renderbuffer(struct gl_context *ctx,
 518                           struct gl_renderbuffer *rb)
 519 {
 520    struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 521
 522    if (rb->AllocStorage == swrast_alloc_front_storage) {
 523       __DRIdrawable *dPriv = xrb->dPriv;
 524       __DRIscreen *sPriv = dPriv->driScreenPriv;
 525
 526       if (xrb->map_mode & GL_MAP_WRITE_BIT) {
 527          sPriv->swrast_loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_DRAW,
 528                                         xrb->map_x, xrb->map_y,
 529                                         xrb->map_w, xrb->map_h,
 530                                         (char *) xrb->Base.Buffer,
 531                                         dPriv->loaderPrivate);
 532       }
 533
 534       free(xrb->Base.Buffer);
 535       xrb->Base.Buffer = NULL;
 536    }
 537 }
 538
 539 static GLboolean
 540 dri_create_buffer(__DRIscreen * sPriv,
 541                   __DRIdrawable * dPriv,
 542                   const struct gl_config * visual, GLboolean isPixmap)
 543 {
 544     struct dri_drawable *drawable = NULL;
 545     struct gl_framebuffer *fb;
 546     struct dri_swrast_renderbuffer *frontrb, *backrb;
 547
 548     TRACE;
 549
 550     (void) sPriv;
 551     (void) isPixmap;
 552
 553     drawable = CALLOC_STRUCT(dri_drawable);
 554     if (drawable == NULL)
 555         goto drawable_fail;
 556
 557     dPriv->driverPrivate = drawable;
 558     drawable->dPriv = dPriv;
 559
 560     drawable->row = malloc(SWRAST_MAX_WIDTH * 4);
 561     if (drawable->row == NULL)
 562         goto drawable_fail;
 563
 564     fb = &drawable->Base;
 565
 566     /* basic framebuffer setup */
 567     _mesa_initialize_window_framebuffer(fb, visual);
 568
 569     /* add front renderbuffer */
 570     frontrb = swrast_new_renderbuffer(visual, dPriv, GL_TRUE);
 571     _mesa_attach_and_own_rb(fb, BUFFER_FRONT_LEFT, &frontrb->Base.Base);
 572
 573     /* add back renderbuffer */
 574     if (visual->doubleBufferMode) {
 575         backrb = swrast_new_renderbuffer(visual, dPriv, GL_FALSE);
 576         _mesa_attach_and_own_rb(fb, BUFFER_BACK_LEFT, &backrb->Base.Base);
 577     }
 578
 579     /* add software renderbuffers */
 580     _swrast_add_soft_renderbuffers(fb,
 581                                    GL_FALSE, /* color */
 582                                    visual->haveDepthBuffer,
 583                                    visual->haveStencilBuffer,
 584                                    visual->haveAccumBuffer,
 585                                    GL_FALSE, /* alpha */
 586                                    GL_FALSE /* aux bufs */);
 587
 588     return GL_TRUE;
 589
 590 drawable_fail:
 591
 592     if (drawable)
 593         free(drawable->row);
 594
 595     free(drawable);
 596
 597     return GL_FALSE;
 598 }
 599
 600 static void
 601 dri_destroy_buffer(__DRIdrawable * dPriv)
 602 {
 603     TRACE;
 604
 605     if (dPriv) {
 606         struct dri_drawable *drawable = dri_drawable(dPriv);
 607         struct gl_framebuffer *fb;
 608
 609         free(drawable->row);
 610
 611         fb = &drawable->Base;
 612
 613         fb->DeletePending = GL_TRUE;
 614         _mesa_reference_framebuffer(&fb, NULL);
 615     }
 616 }
 617
 618 static void
 619 dri_swap_buffers(__DRIdrawable * dPriv)
 620 {
 621     __DRIscreen *sPriv = dPriv->driScreenPriv;
 622
 623     GET_CURRENT_CONTEXT(ctx);
 624
 625     struct dri_drawable *drawable = dri_drawable(dPriv);
 626     struct gl_framebuffer *fb;
 627     struct dri_swrast_renderbuffer *frontrb, *backrb;
 628
 629     TRACE;
 630
 631     fb = &drawable->Base;
 632
 633     frontrb =
 634         dri_swrast_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
 635     backrb =
 636         dri_swrast_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
 637
 638     /* check for signle-buffered */
 639     if (backrb == NULL)
 640         return;
 641
 642     /* check if swapping currently bound buffer */
 643     if (ctx && ctx->DrawBuffer == fb) {
 644         /* flush pending rendering */
 645         _mesa_notifySwapBuffers(ctx);
 646     }
 647
 648     sPriv->swrast_loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
 649                                    0, 0,
 650                                    frontrb->Base.Base.Width,
 651                                    frontrb->Base.Base.Height,
 652                                    (char *) backrb->Base.Buffer,
 653                                    dPriv->loaderPrivate);
 654 }
 655
 656
 657 /**
 658  * General device driver functions.
 659  */
 660
 661 static void
 662 get_window_size( struct gl_framebuffer *fb, GLsizei *w, GLsizei *h )
 663 {
 664     __DRIdrawable *dPriv = swrast_drawable(fb)->dPriv;
 665     __DRIscreen *sPriv = dPriv->driScreenPriv;
 666     int x, y;
 667
 668     sPriv->swrast_loader->getDrawableInfo(dPriv,
 669                                           &x, &y, w, h,
 670                                           dPriv->loaderPrivate);
 671 }
 672
 673 static void
 674 swrast_check_and_update_window_size( struct gl_context *ctx, struct gl_framebuffer *fb )
 675 {
 676     GLsizei width, height;
 677
 678     get_window_size(fb, &width, &height);
 679     if (fb->Width != width || fb->Height != height) {
 680         _mesa_resize_framebuffer(ctx, fb, width, height);
 681     }
 682 }
 683
 684 static const GLubyte *
 685 get_string(struct gl_context *ctx, GLenum pname)
 686 {
 687     (void) ctx;
 688     switch (pname) {
 689         case GL_VENDOR:
 690             return (const GLubyte *) swrast_vendor_string;
 691         case GL_RENDERER:
 692             return (const GLubyte *) swrast_renderer_string;
 693         default:
 694             return NULL;
 695     }
 696 }
 697
 698 static void
 699 update_state(struct gl_context *ctx)
 700 {
 701     GLuint new_state = ctx->NewState;
 702
 703     if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT))
 704       _mesa_update_draw_buffer_bounds(ctx, ctx->DrawBuffer);
 705
 706     /* not much to do here - pass it on */
 707     _swrast_InvalidateState( ctx, new_state );
 708     _swsetup_InvalidateState( ctx, new_state );
 709     _tnl_InvalidateState( ctx, new_state );
 710 }
 711
 712 static void
 713 viewport(struct gl_context *ctx)
 714 {
 715     struct gl_framebuffer *draw = ctx->WinSysDrawBuffer;
 716     struct gl_framebuffer *read = ctx->WinSysReadBuffer;
 717
 718     swrast_check_and_update_window_size(ctx, draw);
 719     swrast_check_and_update_window_size(ctx, read);
 720 }
 721
 722 static mesa_format swrastChooseTextureFormat(struct gl_context * ctx,
 723                                            GLenum target,
 724                                            GLint internalFormat,
 725                                            GLenum format,
 726                                            GLenum type)
 727 {
 728     if (internalFormat == GL_RGB)
 729         return MESA_FORMAT_B8G8R8X8_UNORM;
 730     return _mesa_choose_tex_format(ctx, target, internalFormat, format, type);
 731 }
 732
 733 static void
 734 swrast_init_driver_functions(struct dd_function_table *driver)
 735 {
 736     driver->GetString = get_string;
 737     driver->UpdateState = update_state;
 738     driver->Viewport = viewport;
 739     driver->ChooseTextureFormat = swrastChooseTextureFormat;
 740     driver->MapRenderbuffer = swrast_map_renderbuffer;
 741     driver->UnmapRenderbuffer = swrast_unmap_renderbuffer;
 742 }
 743
 744 /**
 745  * Context-related functions.
 746  */
 747
 748 static GLboolean
 749 dri_create_context(gl_api api,
 750                    const struct gl_config * visual,
 751                    __DRIcontext * cPriv,
 752                    const struct __DriverContextConfig *ctx_config,
 753                    unsigned *error,
 754                    void *sharedContextPrivate)
 755 {
 756     struct dri_context *ctx = NULL;
 757     struct dri_context *share = (struct dri_context *)sharedContextPrivate;
 758     struct gl_context *mesaCtx = NULL;
 759     struct gl_context *sharedCtx = NULL;
 760     struct dd_function_table functions;
 761
 762     TRACE;
 763
 764     /* Flag filtering is handled in dri2CreateContextAttribs.
 765      */
 766     (void) ctx_config->flags;
 767
 768     /* The swrast driver doesn't understand any of the attributes */
 769     if (ctx_config->attribute_mask != 0) {
 770         *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 771         return false;
 772     }
 773
 774     ctx = CALLOC_STRUCT(dri_context);
 775     if (ctx == NULL) {
 776         *error = __DRI_CTX_ERROR_NO_MEMORY;
 777         goto context_fail;
 778     }
 779
 780     cPriv->driverPrivate = ctx;
 781     ctx->cPriv = cPriv;
 782
 783     /* build table of device driver functions */
 784     _mesa_init_driver_functions(&functions);
 785     swrast_init_driver_functions(&functions);
 786     _tnl_init_driver_draw_function(&functions);
 787
 788     if (share) {
 789         sharedCtx = &share->Base;
 790     }
 791
 792     mesaCtx = &ctx->Base;
 793
 794     /* basic context setup */
 795     if (!_mesa_initialize_context(mesaCtx, api, visual, sharedCtx, &functions)) {
 796         *error = __DRI_CTX_ERROR_NO_MEMORY;
 797         goto context_fail;
 798     }
 799
 800     driContextSetFlags(mesaCtx, ctx_config->flags);
 801
 802     /* create module contexts */
 803     _swrast_CreateContext( mesaCtx );
 804     _vbo_CreateContext( mesaCtx );
 805     _tnl_CreateContext( mesaCtx );
 806     _swsetup_CreateContext( mesaCtx );
 807     _swsetup_Wakeup( mesaCtx );
 808
 809     /* use default TCL pipeline */
 810     {
 811        TNLcontext *tnl = TNL_CONTEXT(mesaCtx);
 812        tnl->Driver.RunPipeline = _tnl_run_pipeline;
 813     }
 814
 815     _mesa_meta_init(mesaCtx);
 816     _mesa_enable_sw_extensions(mesaCtx);
 817
 818    _mesa_override_extensions(mesaCtx);
 819     _mesa_compute_version(mesaCtx);
 820
 821     _mesa_initialize_dispatch_tables(mesaCtx);
 822     _mesa_initialize_vbo_vtxfmt(mesaCtx);
 823
 824     *error = __DRI_CTX_ERROR_SUCCESS;
 825     return GL_TRUE;
 826
 827 context_fail:
 828
 829     free(ctx);
 830
 831     return GL_FALSE;
 832 }
 833
 834 static void
 835 dri_destroy_context(__DRIcontext * cPriv)
 836 {
 837     TRACE;
 838
 839     if (cPriv) {
 840         struct dri_context *ctx = dri_context(cPriv);
 841         struct gl_context *mesaCtx;
 842
 843         mesaCtx = &ctx->Base;
 844
 845         _mesa_meta_free(mesaCtx);
 846         _swsetup_DestroyContext( mesaCtx );
 847         _swrast_DestroyContext( mesaCtx );
 848         _tnl_DestroyContext( mesaCtx );
 849         _vbo_DestroyContext( mesaCtx );
 850         _mesa_destroy_context( mesaCtx );
 851     }
 852 }
 853
 854 static GLboolean
 855 dri_make_current(__DRIcontext * cPriv,
 856                  __DRIdrawable * driDrawPriv,
 857                  __DRIdrawable * driReadPriv)
 858 {
 859     struct gl_context *mesaCtx;
 860     struct gl_framebuffer *mesaDraw;
 861     struct gl_framebuffer *mesaRead;
 862     TRACE;
 863
 864     if (cPriv) {
 865         struct dri_context *ctx = dri_context(cPriv);
 866         struct dri_drawable *draw;
 867         struct dri_drawable *read;
 868
 869         if (!driDrawPriv || !driReadPriv)
 870             return GL_FALSE;
 871
 872         draw = dri_drawable(driDrawPriv);
 873         read = dri_drawable(driReadPriv);
 874         mesaCtx = &ctx->Base;
 875         mesaDraw = &draw->Base;
 876         mesaRead = &read->Base;
 877
 878         /* check for same context and buffer */
 879         if (mesaCtx == _mesa_get_current_context()
 880             && mesaCtx->DrawBuffer == mesaDraw
 881             && mesaCtx->ReadBuffer == mesaRead) {
 882             return GL_TRUE;
 883         }
 884
 885         _glapi_check_multithread();
 886
 887         swrast_check_and_update_window_size(mesaCtx, mesaDraw);
 888         if (mesaRead != mesaDraw)
 889             swrast_check_and_update_window_size(mesaCtx, mesaRead);
 890
 891         _mesa_make_current( mesaCtx,
 892                             mesaDraw,
 893                             mesaRead );
 894     }
 895     else {
 896         /* unbind */
 897         _mesa_make_current( NULL, NULL, NULL );
 898     }
 899
 900     return GL_TRUE;
 901 }
 902
 903 static GLboolean
 904 dri_unbind_context(__DRIcontext * cPriv)
 905 {
 906     TRACE;
 907     (void) cPriv;
 908
 909     /* Unset current context and dispath table */
 910     _mesa_make_current(NULL, NULL, NULL);
 911
 912     return GL_TRUE;
 913 }
 914
 915 static void
 916 dri_copy_sub_buffer(__DRIdrawable *dPriv, int x, int y,
 917                     int w, int h)
 918 {
 919     __DRIscreen *sPriv = dPriv->driScreenPriv;
 920     void *data;
 921     int iy;
 922     struct dri_drawable *drawable = dri_drawable(dPriv);
 923     struct gl_framebuffer *fb;
 924     struct dri_swrast_renderbuffer *frontrb, *backrb;
 925
 926     TRACE;
 927
 928     fb = &drawable->Base;
 929
 930     frontrb =
 931         dri_swrast_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
 932     backrb =
 933         dri_swrast_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
 934
 935     /* check for signle-buffered */
 936     if (backrb == NULL)
 937        return;
 938
 939     iy = frontrb->Base.Base.Height - y - h;
 940     data = (char *)backrb->Base.Buffer + (iy * backrb->pitch) + (x * ((backrb->bpp + 7) / 8));
 941     sPriv->swrast_loader->putImage2(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
 942                                     x, iy, w, h,
 943                                     frontrb->pitch,
 944                                     data,
 945                                     dPriv->loaderPrivate);
 946 }
 947
 948
 949 static const struct __DriverAPIRec swrast_driver_api = {
 950     .InitScreen = dri_init_screen,
 951     .DestroyScreen = dri_destroy_screen,
 952     .CreateContext = dri_create_context,
 953     .DestroyContext = dri_destroy_context,
 954     .CreateBuffer = dri_create_buffer,
 955     .DestroyBuffer = dri_destroy_buffer,
 956     .SwapBuffers = dri_swap_buffers,
 957     .MakeCurrent = dri_make_current,
 958     .UnbindContext = dri_unbind_context,
 959     .CopySubBuffer = dri_copy_sub_buffer,
 960 };
 961
 962 static const struct __DRIDriverVtableExtensionRec swrast_vtable = {
 963    .base = { __DRI_DRIVER_VTABLE, 1 },
 964    .vtable = &swrast_driver_api,
 965 };
 966
 967 static const __DRIextension *swrast_driver_extensions[] = {
 968     &driCoreExtension.base,
 969     &driSWRastExtension.base,
 970     &driCopySubBufferExtension.base,
 971     &swrast_vtable.base,
 972     NULL
 973 };
 974
 975 PUBLIC const __DRIextension **__driDriverGetExtensions_swrast(void)
 976 {
 977    globalDriverAPI = &swrast_driver_api;
 978
 979    return swrast_driver_extensions;
 980 }