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     NULL
 212 };
 213
 214 static __DRIconfig **
 215 swrastFillInModes(__DRIscreen *psp,
 216                   unsigned pixel_bits, unsigned depth_bits,
 217                   unsigned stencil_bits, GLboolean have_back_buffer)
 218 {
 219     __DRIconfig **configs;
 220     unsigned depth_buffer_factor;
 221     unsigned back_buffer_factor;
 222     mesa_format format;
 223
 224     /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
 225      * support pageflipping at all.
 226      */
 227     static const GLenum back_buffer_modes[] = {
 228         GLX_NONE, GLX_SWAP_UNDEFINED_OML
 229     };
 230
 231     uint8_t depth_bits_array[4];
 232     uint8_t stencil_bits_array[4];
 233     uint8_t msaa_samples_array[1];
 234
 235     (void) psp;
 236     (void) have_back_buffer;
 237
 238     depth_bits_array[0] = 0;
 239     depth_bits_array[1] = 0;
 240     depth_bits_array[2] = depth_bits;
 241     depth_bits_array[3] = depth_bits;
 242
 243     /* Just like with the accumulation buffer, always provide some modes
 244      * with a stencil buffer.
 245      */
 246     stencil_bits_array[0] = 0;
 247     stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;
 248     stencil_bits_array[2] = 0;
 249     stencil_bits_array[3] = (stencil_bits == 0) ? 8 : stencil_bits;
 250
 251     msaa_samples_array[0] = 0;
 252
 253     depth_buffer_factor = 4;
 254     back_buffer_factor = 2;
 255
 256     switch (pixel_bits) {
 257     case 16:
 258         format = MESA_FORMAT_B5G6R5_UNORM;
 259         break;
 260     case 24:
 261         format = MESA_FORMAT_B8G8R8X8_UNORM;
 262         break;
 263     case 32:
 264         format = MESA_FORMAT_B8G8R8A8_UNORM;
 265         break;
 266     default:
 267         fprintf(stderr, "[%s:%u] bad depth %d\n", __func__, __LINE__,
 268                 pixel_bits);
 269         return NULL;
 270     }
 271
 272     configs = driCreateConfigs(format,
 273                                depth_bits_array, stencil_bits_array,
 274                                depth_buffer_factor, back_buffer_modes,
 275                                back_buffer_factor, msaa_samples_array, 1,
 276                                GL_TRUE);
 277     if (configs == NULL) {
 278         fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 279                 __LINE__);
 280         return NULL;
 281     }
 282
 283     return configs;
 284 }
 285
 286 static const __DRIconfig **
 287 dri_init_screen(__DRIscreen * psp)
 288 {
 289     __DRIconfig **configs16, **configs24, **configs32;
 290
 291     TRACE;
 292
 293     psp->max_gl_compat_version = 21;
 294     psp->max_gl_es1_version = 11;
 295     psp->max_gl_es2_version = 20;
 296
 297     psp->extensions = dri_screen_extensions;
 298
 299     configs16 = swrastFillInModes(psp, 16, 16, 0, 1);
 300     configs24 = swrastFillInModes(psp, 24, 24, 8, 1);
 301     configs32 = swrastFillInModes(psp, 32, 24, 8, 1);
 302
 303     configs24 = driConcatConfigs(configs16, configs24);
 304     configs32 = driConcatConfigs(configs24, configs32);
 305
 306     return (const __DRIconfig **)configs32;
 307 }
 308
 309 static void
 310 dri_destroy_screen(__DRIscreen * sPriv)
 311 {
 312     TRACE;
 313     (void) sPriv;
 314 }
 315
 316
 317 /**
 318  * Framebuffer and renderbuffer-related functions.
 319  */
 320
 321 static GLuint
 322 choose_pixel_format(const struct gl_config *v)
 323 {
 324     int depth = v->rgbBits;
 325
 326     if (depth == 32
 327         && v->redMask   == 0xff0000
 328         && v->greenMask == 0x00ff00
 329         && v->blueMask  == 0x0000ff)
 330         return PF_A8R8G8B8;
 331     else if (depth == 24
 332              && v->redMask   == 0xff0000
 333              && v->greenMask == 0x00ff00
 334              && v->blueMask  == 0x0000ff)
 335         return PF_X8R8G8B8;
 336     else if (depth == 16
 337              && v->redMask   == 0xf800
 338              && v->greenMask == 0x07e0
 339              && v->blueMask  == 0x001f)
 340         return PF_R5G6B5;
 341     else if (depth == 8
 342              && v->redMask   == 0x07
 343              && v->greenMask == 0x38
 344              && v->blueMask  == 0xc0)
 345         return PF_R3G3B2;
 346
 347     _mesa_problem( NULL, "unexpected format in %s", __func__ );
 348     return 0;
 349 }
 350
 351 static void
 352 swrast_delete_renderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb)
 353 {
 354     struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 355
 356     TRACE;
 357
 358     free(xrb->Base.Buffer);
 359     _mesa_delete_renderbuffer(ctx, rb);
 360 }
 361
 362 /* see bytes_per_line in libGL */
 363 static inline int
 364 bytes_per_line(unsigned pitch_bits, unsigned mul)
 365 {
 366    unsigned mask = mul - 1;
 367
 368    return ((pitch_bits + mask) & ~mask) / 8;
 369 }
 370
 371 static GLboolean
 372 swrast_alloc_front_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
 373                            GLenum internalFormat, GLuint width, GLuint height)
 374 {
 375     struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 376
 377     TRACE;
 378
 379     (void) ctx;
 380     (void) internalFormat;
 381
 382     xrb->Base.Buffer = NULL;
 383     rb->Width = width;
 384     rb->Height = height;
 385     xrb->pitch = bytes_per_line(width * xrb->bpp, 32);
 386
 387     return GL_TRUE;
 388 }
 389
 390 static GLboolean
 391 swrast_alloc_back_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
 392                           GLenum internalFormat, GLuint width, GLuint height)
 393 {
 394     struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 395
 396     TRACE;
 397
 398     free(xrb->Base.Buffer);
 399
 400     swrast_alloc_front_storage(ctx, rb, internalFormat, width, height);
 401
 402     xrb->Base.Buffer = malloc(height * xrb->pitch);
 403
 404     return GL_TRUE;
 405 }
 406
 407 static struct dri_swrast_renderbuffer *
 408 swrast_new_renderbuffer(const struct gl_config *visual, __DRIdrawable *dPriv,
 409                         GLboolean front)
 410 {
 411     struct dri_swrast_renderbuffer *xrb = calloc(1, sizeof *xrb);
 412     struct gl_renderbuffer *rb;
 413     GLuint pixel_format;
 414
 415     TRACE;
 416
 417     if (!xrb)
 418         return NULL;
 419
 420     rb = &xrb->Base.Base;
 421
 422     _mesa_init_renderbuffer(rb, 0);
 423
 424     pixel_format = choose_pixel_format(visual);
 425
 426     xrb->dPriv = dPriv;
 427     xrb->Base.Base.Delete = swrast_delete_renderbuffer;
 428     if (front) {
 429         rb->AllocStorage = swrast_alloc_front_storage;
 430     }
 431     else {
 432         rb->AllocStorage = swrast_alloc_back_storage;
 433     }
 434
 435     switch (pixel_format) {
 436     case PF_A8R8G8B8:
 437         rb->Format = MESA_FORMAT_B8G8R8A8_UNORM;
 438         rb->InternalFormat = GL_RGBA;
 439         rb->_BaseFormat = GL_RGBA;
 440         xrb->bpp = 32;
 441         break;
 442     case PF_X8R8G8B8:
 443         rb->Format = MESA_FORMAT_B8G8R8A8_UNORM; /* XXX */
 444         rb->InternalFormat = GL_RGB;
 445         rb->_BaseFormat = GL_RGB;
 446         xrb->bpp = 32;
 447         break;
 448     case PF_R5G6B5:
 449         rb->Format = MESA_FORMAT_B5G6R5_UNORM;
 450         rb->InternalFormat = GL_RGB;
 451         rb->_BaseFormat = GL_RGB;
 452         xrb->bpp = 16;
 453         break;
 454     case PF_R3G3B2:
 455         rb->Format = MESA_FORMAT_B2G3R3_UNORM;
 456         rb->InternalFormat = GL_RGB;
 457         rb->_BaseFormat = GL_RGB;
 458         xrb->bpp = 8;
 459         break;
 460     default:
 461         free(xrb);
 462         return NULL;
 463     }
 464
 465     return xrb;
 466 }
 467
 468 static void
 469 swrast_map_renderbuffer(struct gl_context *ctx,
 470                         struct gl_renderbuffer *rb,
 471                         GLuint x, GLuint y, GLuint w, GLuint h,
 472                         GLbitfield mode,
 473                         GLubyte **out_map,
 474                         GLint *out_stride)
 475 {
 476    struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 477    GLubyte *map = xrb->Base.Buffer;
 478    int cpp = _mesa_get_format_bytes(rb->Format);
 479    int stride = rb->Width * cpp;
 480
 481    if (rb->AllocStorage == swrast_alloc_front_storage) {
 482       __DRIdrawable *dPriv = xrb->dPriv;
 483       __DRIscreen *sPriv = dPriv->driScreenPriv;
 484
 485       xrb->map_mode = mode;
 486       xrb->map_x = x;
 487       xrb->map_y = y;
 488       xrb->map_w = w;
 489       xrb->map_h = h;
 490
 491       stride = w * cpp;
 492       xrb->Base.Buffer = malloc(h * stride);
 493
 494       sPriv->swrast_loader->getImage(dPriv, x, rb->Height - y - h, w, h,
 495                                      (char *) xrb->Base.Buffer,
 496                                      dPriv->loaderPrivate);
 497
 498       *out_map = xrb->Base.Buffer + (h - 1) * stride;
 499       *out_stride = -stride;
 500       return;
 501    }
 502
 503    assert(xrb->Base.Buffer);
 504
 505    if (rb->AllocStorage == swrast_alloc_back_storage) {
 506       map += (rb->Height - 1) * stride;
 507       stride = -stride;
 508    }
 509
 510    map += (GLsizei)y * stride;
 511    map += (GLsizei)x * cpp;
 512
 513    *out_map = map;
 514    *out_stride = stride;
 515 }
 516
 517 static void
 518 swrast_unmap_renderbuffer(struct gl_context *ctx,
 519                           struct gl_renderbuffer *rb)
 520 {
 521    struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
 522
 523    if (rb->AllocStorage == swrast_alloc_front_storage) {
 524       __DRIdrawable *dPriv = xrb->dPriv;
 525       __DRIscreen *sPriv = dPriv->driScreenPriv;
 526
 527       if (xrb->map_mode & GL_MAP_WRITE_BIT) {
 528          sPriv->swrast_loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_DRAW,
 529                                         xrb->map_x, xrb->map_y,
 530                                         xrb->map_w, xrb->map_h,
 531                                         (char *) xrb->Base.Buffer,
 532                                         dPriv->loaderPrivate);
 533       }
 534
 535       free(xrb->Base.Buffer);
 536       xrb->Base.Buffer = NULL;
 537    }
 538 }
 539
 540 static GLboolean
 541 dri_create_buffer(__DRIscreen * sPriv,
 542                   __DRIdrawable * dPriv,
 543                   const struct gl_config * visual, GLboolean isPixmap)
 544 {
 545     struct dri_drawable *drawable = NULL;
 546     struct gl_framebuffer *fb;
 547     struct dri_swrast_renderbuffer *frontrb, *backrb;
 548
 549     TRACE;
 550
 551     (void) sPriv;
 552     (void) isPixmap;
 553
 554     drawable = CALLOC_STRUCT(dri_drawable);
 555     if (drawable == NULL)
 556         goto drawable_fail;
 557
 558     dPriv->driverPrivate = drawable;
 559     drawable->dPriv = dPriv;
 560
 561     drawable->row = malloc(SWRAST_MAX_WIDTH * 4);
 562     if (drawable->row == NULL)
 563         goto drawable_fail;
 564
 565     fb = &drawable->Base;
 566
 567     /* basic framebuffer setup */
 568     _mesa_initialize_window_framebuffer(fb, visual);
 569
 570     /* add front renderbuffer */
 571     frontrb = swrast_new_renderbuffer(visual, dPriv, GL_TRUE);
 572     _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontrb->Base.Base);
 573
 574     /* add back renderbuffer */
 575     if (visual->doubleBufferMode) {
 576         backrb = swrast_new_renderbuffer(visual, dPriv, GL_FALSE);
 577         _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backrb->Base.Base);
 578     }
 579
 580     /* add software renderbuffers */
 581     _swrast_add_soft_renderbuffers(fb,
 582                                    GL_FALSE, /* color */
 583                                    visual->haveDepthBuffer,
 584                                    visual->haveStencilBuffer,
 585                                    visual->haveAccumBuffer,
 586                                    GL_FALSE, /* alpha */
 587                                    GL_FALSE /* aux bufs */);
 588
 589     return GL_TRUE;
 590
 591 drawable_fail:
 592
 593     if (drawable)
 594         free(drawable->row);
 595
 596     free(drawable);
 597
 598     return GL_FALSE;
 599 }
 600
 601 static void
 602 dri_destroy_buffer(__DRIdrawable * dPriv)
 603 {
 604     TRACE;
 605
 606     if (dPriv) {
 607         struct dri_drawable *drawable = dri_drawable(dPriv);
 608         struct gl_framebuffer *fb;
 609
 610         free(drawable->row);
 611
 612         fb = &drawable->Base;
 613
 614         fb->DeletePending = GL_TRUE;
 615         _mesa_reference_framebuffer(&fb, NULL);
 616     }
 617 }
 618
 619 static void
 620 dri_swap_buffers(__DRIdrawable * dPriv)
 621 {
 622     __DRIscreen *sPriv = dPriv->driScreenPriv;
 623
 624     GET_CURRENT_CONTEXT(ctx);
 625
 626     struct dri_drawable *drawable = dri_drawable(dPriv);
 627     struct gl_framebuffer *fb;
 628     struct dri_swrast_renderbuffer *frontrb, *backrb;
 629
 630     TRACE;
 631
 632     fb = &drawable->Base;
 633
 634     frontrb =
 635         dri_swrast_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
 636     backrb =
 637         dri_swrast_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
 638
 639     /* check for signle-buffered */
 640     if (backrb == NULL)
 641         return;
 642
 643     /* check if swapping currently bound buffer */
 644     if (ctx && ctx->DrawBuffer == fb) {
 645         /* flush pending rendering */
 646         _mesa_notifySwapBuffers(ctx);
 647     }
 648
 649     sPriv->swrast_loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
 650                                    0, 0,
 651                                    frontrb->Base.Base.Width,
 652                                    frontrb->Base.Base.Height,
 653                                    (char *) backrb->Base.Buffer,
 654                                    dPriv->loaderPrivate);
 655 }
 656
 657
 658 /**
 659  * General device driver functions.
 660  */
 661
 662 static void
 663 get_window_size( struct gl_framebuffer *fb, GLsizei *w, GLsizei *h )
 664 {
 665     __DRIdrawable *dPriv = swrast_drawable(fb)->dPriv;
 666     __DRIscreen *sPriv = dPriv->driScreenPriv;
 667     int x, y;
 668
 669     sPriv->swrast_loader->getDrawableInfo(dPriv,
 670                                           &x, &y, w, h,
 671                                           dPriv->loaderPrivate);
 672 }
 673
 674 static void
 675 swrast_check_and_update_window_size( struct gl_context *ctx, struct gl_framebuffer *fb )
 676 {
 677     GLsizei width, height;
 678
 679     get_window_size(fb, &width, &height);
 680     if (fb->Width != width || fb->Height != height) {
 681         _mesa_resize_framebuffer(ctx, fb, width, height);
 682     }
 683 }
 684
 685 static const GLubyte *
 686 get_string(struct gl_context *ctx, GLenum pname)
 687 {
 688     (void) ctx;
 689     switch (pname) {
 690         case GL_VENDOR:
 691             return (const GLubyte *) swrast_vendor_string;
 692         case GL_RENDERER:
 693             return (const GLubyte *) swrast_renderer_string;
 694         default:
 695             return NULL;
 696     }
 697 }
 698
 699 static void
 700 update_state( struct gl_context *ctx, GLuint new_state )
 701 {
 702     /* not much to do here - pass it on */
 703     _swrast_InvalidateState( ctx, new_state );
 704     _swsetup_InvalidateState( ctx, new_state );
 705     _vbo_InvalidateState( ctx, new_state );
 706     _tnl_InvalidateState( ctx, new_state );
 707 }
 708
 709 static void
 710 viewport(struct gl_context *ctx)
 711 {
 712     struct gl_framebuffer *draw = ctx->WinSysDrawBuffer;
 713     struct gl_framebuffer *read = ctx->WinSysReadBuffer;
 714
 715     swrast_check_and_update_window_size(ctx, draw);
 716     swrast_check_and_update_window_size(ctx, read);
 717 }
 718
 719 static mesa_format swrastChooseTextureFormat(struct gl_context * ctx,
 720                                            GLenum target,
 721                                            GLint internalFormat,
 722                                            GLenum format,
 723                                            GLenum type)
 724 {
 725     if (internalFormat == GL_RGB)
 726         return MESA_FORMAT_B8G8R8X8_UNORM;
 727     return _mesa_choose_tex_format(ctx, target, internalFormat, format, type);
 728 }
 729
 730 static void
 731 swrast_init_driver_functions(struct dd_function_table *driver)
 732 {
 733     driver->GetString = get_string;
 734     driver->UpdateState = update_state;
 735     driver->Viewport = viewport;
 736     driver->ChooseTextureFormat = swrastChooseTextureFormat;
 737     driver->MapRenderbuffer = swrast_map_renderbuffer;
 738     driver->UnmapRenderbuffer = swrast_unmap_renderbuffer;
 739 }
 740
 741 /**
 742  * Context-related functions.
 743  */
 744
 745 static GLboolean
 746 dri_create_context(gl_api api,
 747                    const struct gl_config * visual,
 748                    __DRIcontext * cPriv,
 749                    unsigned major_version,
 750                    unsigned minor_version,
 751                    uint32_t flags,
 752                    bool notify_reset,
 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) flags;
 767
 768     ctx = CALLOC_STRUCT(dri_context);
 769     if (ctx == NULL) {
 770         *error = __DRI_CTX_ERROR_NO_MEMORY;
 771         goto context_fail;
 772     }
 773
 774     cPriv->driverPrivate = ctx;
 775     ctx->cPriv = cPriv;
 776
 777     /* build table of device driver functions */
 778     _mesa_init_driver_functions(&functions);
 779     swrast_init_driver_functions(&functions);
 780
 781     if (share) {
 782         sharedCtx = &share->Base;
 783     }
 784
 785     mesaCtx = &ctx->Base;
 786
 787     /* basic context setup */
 788     if (!_mesa_initialize_context(mesaCtx, api, visual, sharedCtx, &functions)) {
 789         *error = __DRI_CTX_ERROR_NO_MEMORY;
 790         goto context_fail;
 791     }
 792
 793     driContextSetFlags(mesaCtx, flags);
 794
 795     /* create module contexts */
 796     _swrast_CreateContext( mesaCtx );
 797     _vbo_CreateContext( mesaCtx );
 798     _tnl_CreateContext( mesaCtx );
 799     _swsetup_CreateContext( mesaCtx );
 800     _swsetup_Wakeup( mesaCtx );
 801
 802     /* use default TCL pipeline */
 803     {
 804        TNLcontext *tnl = TNL_CONTEXT(mesaCtx);
 805        tnl->Driver.RunPipeline = _tnl_run_pipeline;
 806     }
 807
 808     _mesa_meta_init(mesaCtx);
 809     _mesa_enable_sw_extensions(mesaCtx);
 810
 811     _mesa_compute_version(mesaCtx);
 812
 813     _mesa_initialize_dispatch_tables(mesaCtx);
 814     _mesa_initialize_vbo_vtxfmt(mesaCtx);
 815
 816     *error = __DRI_CTX_ERROR_SUCCESS;
 817     return GL_TRUE;
 818
 819 context_fail:
 820
 821     free(ctx);
 822
 823     return GL_FALSE;
 824 }
 825
 826 static void
 827 dri_destroy_context(__DRIcontext * cPriv)
 828 {
 829     TRACE;
 830
 831     if (cPriv) {
 832         struct dri_context *ctx = dri_context(cPriv);
 833         struct gl_context *mesaCtx;
 834
 835         mesaCtx = &ctx->Base;
 836
 837         _mesa_meta_free(mesaCtx);
 838         _swsetup_DestroyContext( mesaCtx );
 839         _swrast_DestroyContext( mesaCtx );
 840         _tnl_DestroyContext( mesaCtx );
 841         _vbo_DestroyContext( mesaCtx );
 842         _mesa_destroy_context( mesaCtx );
 843     }
 844 }
 845
 846 static GLboolean
 847 dri_make_current(__DRIcontext * cPriv,
 848                  __DRIdrawable * driDrawPriv,
 849                  __DRIdrawable * driReadPriv)
 850 {
 851     struct gl_context *mesaCtx;
 852     struct gl_framebuffer *mesaDraw;
 853     struct gl_framebuffer *mesaRead;
 854     TRACE;
 855
 856     if (cPriv) {
 857         struct dri_context *ctx = dri_context(cPriv);
 858         struct dri_drawable *draw;
 859         struct dri_drawable *read;
 860
 861         if (!driDrawPriv || !driReadPriv)
 862             return GL_FALSE;
 863
 864         draw = dri_drawable(driDrawPriv);
 865         read = dri_drawable(driReadPriv);
 866         mesaCtx = &ctx->Base;
 867         mesaDraw = &draw->Base;
 868         mesaRead = &read->Base;
 869
 870         /* check for same context and buffer */
 871         if (mesaCtx == _mesa_get_current_context()
 872             && mesaCtx->DrawBuffer == mesaDraw
 873             && mesaCtx->ReadBuffer == mesaRead) {
 874             return GL_TRUE;
 875         }
 876
 877         _glapi_check_multithread();
 878
 879         swrast_check_and_update_window_size(mesaCtx, mesaDraw);
 880         if (mesaRead != mesaDraw)
 881             swrast_check_and_update_window_size(mesaCtx, mesaRead);
 882
 883         _mesa_make_current( mesaCtx,
 884                             mesaDraw,
 885                             mesaRead );
 886     }
 887     else {
 888         /* unbind */
 889         _mesa_make_current( NULL, NULL, NULL );
 890     }
 891
 892     return GL_TRUE;
 893 }
 894
 895 static GLboolean
 896 dri_unbind_context(__DRIcontext * cPriv)
 897 {
 898     TRACE;
 899     (void) cPriv;
 900
 901     /* Unset current context and dispath table */
 902     _mesa_make_current(NULL, NULL, NULL);
 903
 904     return GL_TRUE;
 905 }
 906
 907 static void
 908 dri_copy_sub_buffer(__DRIdrawable *dPriv, int x, int y,
 909                     int w, int h)
 910 {
 911     __DRIscreen *sPriv = dPriv->driScreenPriv;
 912     void *data;
 913     int iy;
 914     struct dri_drawable *drawable = dri_drawable(dPriv);
 915     struct gl_framebuffer *fb;
 916     struct dri_swrast_renderbuffer *frontrb, *backrb;
 917
 918     TRACE;
 919
 920     fb = &drawable->Base;
 921
 922     frontrb =
 923         dri_swrast_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
 924     backrb =
 925         dri_swrast_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
 926
 927     /* check for signle-buffered */
 928     if (backrb == NULL)
 929        return;
 930
 931     iy = frontrb->Base.Base.Height - y - h;
 932     data = (char *)backrb->Base.Buffer + (iy * backrb->pitch) + (x * ((backrb->bpp + 7) / 8));
 933     sPriv->swrast_loader->putImage2(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
 934                                     x, iy, w, h,
 935                                     frontrb->pitch,
 936                                     data,
 937                                     dPriv->loaderPrivate);
 938 }
 939
 940
 941 static const struct __DriverAPIRec swrast_driver_api = {
 942     .InitScreen = dri_init_screen,
 943     .DestroyScreen = dri_destroy_screen,
 944     .CreateContext = dri_create_context,
 945     .DestroyContext = dri_destroy_context,
 946     .CreateBuffer = dri_create_buffer,
 947     .DestroyBuffer = dri_destroy_buffer,
 948     .SwapBuffers = dri_swap_buffers,
 949     .MakeCurrent = dri_make_current,
 950     .UnbindContext = dri_unbind_context,
 951     .CopySubBuffer = dri_copy_sub_buffer,
 952 };
 953
 954 static const struct __DRIDriverVtableExtensionRec swrast_vtable = {
 955    .base = { __DRI_DRIVER_VTABLE, 1 },
 956    .vtable = &swrast_driver_api,
 957 };
 958
 959 static const __DRIextension *swrast_driver_extensions[] = {
 960     &driCoreExtension.base,
 961     &driSWRastExtension.base,
 962     &driCopySubBufferExtension.base,
 963     &dri2ConfigQueryExtension.base,
 964     &swrast_vtable.base,
 965     NULL
 966 };
 967
 968 PUBLIC const __DRIextension **__driDriverGetExtensions_swrast(void)
 969 {
 970    globalDriverAPI = &swrast_driver_api;
 971
 972    return swrast_driver_extensions;
 973 }