src/mesa/drivers/dri/radeon/radeon_fbo.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Red Hat Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include "main/imports.h"
  30 #include "main/macros.h"
  31 #include "main/mtypes.h"
  32 #include "main/fbobject.h"
  33 #include "main/framebuffer.h"
  34 #include "main/renderbuffer.h"
  35 #include "main/context.h"
  36 #include "main/texformat.h"
  37 #include "main/texrender.h"
  38
  39 #include "radeon_common.h"
  40 #include "radeon_mipmap_tree.h"
  41
  42 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  43 #define DBG(...) do {                                           \
  44         if (RADEON_DEBUG & FILE_DEBUG_FLAG)                      \
  45                 _mesa_printf(__VA_ARGS__);                      \
  46 } while(0)
  47
  48 static struct gl_framebuffer *
  49 radeon_new_framebuffer(GLcontext *ctx, GLuint name)
  50 {
  51   return _mesa_new_framebuffer(ctx, name);
  52 }
  53
  54 static void
  55 radeon_delete_renderbuffer(struct gl_renderbuffer *rb)
  56 {
  57   struct radeon_renderbuffer *rrb = radeon_renderbuffer(rb);
  58
  59   ASSERT(rrb);
  60
  61   if (rrb && rrb->bo) {
  62     radeon_bo_unref(rrb->bo);
  63   }
  64   _mesa_free(rrb);
  65 }
  66
  67 static void *
  68 radeon_get_pointer(GLcontext *ctx, struct gl_renderbuffer *rb,
  69                    GLint x, GLint y)
  70 {
  71   return NULL;
  72 }
  73
  74 /**
  75  * Called via glRenderbufferStorageEXT() to set the format and allocate
  76  * storage for a user-created renderbuffer.
  77  */
  78 static GLboolean
  79 radeon_alloc_renderbuffer_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
  80                                  GLenum internalFormat,
  81                                  GLuint width, GLuint height)
  82 {
  83   struct radeon_context *radeon = RADEON_CONTEXT(ctx);
  84   struct radeon_renderbuffer *rrb = radeon_renderbuffer(rb);
  85   GLboolean software_buffer = GL_FALSE;
  86   int cpp;
  87
  88    ASSERT(rb->Name != 0);
  89   switch (internalFormat) {
  90    case GL_R3_G3_B2:
  91    case GL_RGB4:
  92    case GL_RGB5:
  93       rb->_ActualFormat = GL_RGB5;
  94       rb->DataType = GL_UNSIGNED_BYTE;
  95       rb->RedBits = 5;
  96       rb->GreenBits = 6;
  97       rb->BlueBits = 5;
  98       cpp = 2;
  99       break;
 100    case GL_RGB:
 101    case GL_RGB8:
 102    case GL_RGB10:
 103    case GL_RGB12:
 104    case GL_RGB16:
 105       rb->_ActualFormat = GL_RGB8;
 106       rb->DataType = GL_UNSIGNED_BYTE;
 107       rb->RedBits = 8;
 108       rb->GreenBits = 8;
 109       rb->BlueBits = 8;
 110       rb->AlphaBits = 0;
 111       cpp = 4;
 112       break;
 113    case GL_RGBA:
 114    case GL_RGBA2:
 115    case GL_RGBA4:
 116    case GL_RGB5_A1:
 117    case GL_RGBA8:
 118    case GL_RGB10_A2:
 119    case GL_RGBA12:
 120    case GL_RGBA16:
 121       rb->_ActualFormat = GL_RGBA8;
 122       rb->DataType = GL_UNSIGNED_BYTE;
 123       rb->RedBits = 8;
 124       rb->GreenBits = 8;
 125       rb->BlueBits = 8;
 126       rb->AlphaBits = 8;
 127       cpp = 4;
 128       break;
 129    case GL_STENCIL_INDEX:
 130    case GL_STENCIL_INDEX1_EXT:
 131    case GL_STENCIL_INDEX4_EXT:
 132    case GL_STENCIL_INDEX8_EXT:
 133    case GL_STENCIL_INDEX16_EXT:
 134       /* alloc a depth+stencil buffer */
 135       rb->_ActualFormat = GL_DEPTH24_STENCIL8_EXT;
 136       rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
 137       rb->StencilBits = 8;
 138       cpp = 4;
 139       break;
 140    case GL_DEPTH_COMPONENT16:
 141       rb->_ActualFormat = GL_DEPTH_COMPONENT16;
 142       rb->DataType = GL_UNSIGNED_SHORT;
 143       rb->DepthBits = 16;
 144       cpp = 2;
 145       break;
 146    case GL_DEPTH_COMPONENT:
 147    case GL_DEPTH_COMPONENT24:
 148    case GL_DEPTH_COMPONENT32:
 149       rb->_ActualFormat = GL_DEPTH24_STENCIL8_EXT;
 150       rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
 151       rb->DepthBits = 24;
 152       cpp = 4;
 153       break;
 154    case GL_DEPTH_STENCIL_EXT:
 155    case GL_DEPTH24_STENCIL8_EXT:
 156       rb->_ActualFormat = GL_DEPTH24_STENCIL8_EXT;
 157       rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
 158       rb->DepthBits = 24;
 159       rb->StencilBits = 8;
 160       cpp = 4;
 161       break;
 162    default:
 163       _mesa_problem(ctx,
 164                     "Unexpected format in intel_alloc_renderbuffer_storage");
 165       return GL_FALSE;
 166    }
 167
 168   ctx->Driver.Flush(ctx); /* +r6/r7 */
 169
 170   if (rrb->bo)
 171     radeon_bo_unref(rrb->bo);
 172
 173
 174    if (software_buffer) {
 175       return _mesa_soft_renderbuffer_storage(ctx, rb, internalFormat,
 176                                              width, height);
 177    }
 178    else {
 179      uint32_t size = width * height * cpp;
 180      uint32_t pitch = ((cpp * width + 63) & ~63) / cpp;
 181
 182      fprintf(stderr,"Allocating %d x %d radeon RBO (pitch %d)\n", width,
 183           height, pitch);
 184
 185      rrb->pitch = pitch * cpp;
 186      rrb->cpp = cpp;
 187 #ifdef RADEON_DEBUG_BO
 188      rrb->bo = radeon_bo_open(radeon->radeonScreen->bom,
 189                               0,
 190                               size,
 191                               0,
 192                               RADEON_GEM_DOMAIN_VRAM,
 193                               0,
 194                   "Radeon RBO");
 195 #else
 196      rrb->bo = radeon_bo_open(radeon->radeonScreen->bom,
 197                               0,
 198                               size,
 199                               0,
 200                               RADEON_GEM_DOMAIN_VRAM,
 201                               0);
 202 #endif /* RADEON_DEBUG_BO */
 203      rb->Width = width;
 204      rb->Height = height;
 205        return GL_TRUE;
 206    }
 207
 208 }
 209
 210
 211 /**
 212  * Called for each hardware renderbuffer when a _window_ is resized.
 213  * Just update fields.
 214  * Not used for user-created renderbuffers!
 215  */
 216 static GLboolean
 217 radeon_alloc_window_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
 218                            GLenum internalFormat, GLuint width, GLuint height)
 219 {
 220    ASSERT(rb->Name == 0);
 221    rb->Width = width;
 222    rb->Height = height;
 223    rb->_ActualFormat = internalFormat;
 224
 225    return GL_TRUE;
 226 }
 227
 228
 229 static void
 230 radeon_resize_buffers(GLcontext *ctx, struct gl_framebuffer *fb,
 231                      GLuint width, GLuint height)
 232 {
 233      struct radeon_framebuffer *radeon_fb = (struct radeon_framebuffer*)fb;
 234    int i;
 235
 236    _mesa_resize_framebuffer(ctx, fb, width, height);
 237
 238    fb->Initialized = GL_TRUE; /* XXX remove someday */
 239
 240    if (fb->Name != 0) {
 241       return;
 242    }
 243
 244    /* Make sure all window system renderbuffers are up to date */
 245    for (i = 0; i < 2; i++) {
 246       struct gl_renderbuffer *rb = &radeon_fb->color_rb[i]->base;
 247
 248       /* only resize if size is changing */
 249       if (rb && (rb->Width != width || rb->Height != height)) {
 250          rb->AllocStorage(ctx, rb, rb->InternalFormat, width, height);
 251       }
 252    }
 253 }
 254
 255
 256 /** Dummy function for gl_renderbuffer::AllocStorage() */
 257 static GLboolean
 258 radeon_nop_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
 259                          GLenum internalFormat, GLuint width, GLuint height)
 260 {
 261    _mesa_problem(ctx, "radeon_op_alloc_storage should never be called.");
 262    return GL_FALSE;
 263 }
 264
 265 struct radeon_renderbuffer *
 266 radeon_create_renderbuffer(GLenum format, __DRIdrawablePrivate *driDrawPriv)
 267 {
 268     struct radeon_renderbuffer *rrb;
 269
 270     rrb = CALLOC_STRUCT(radeon_renderbuffer);
 271     if (!rrb)
 272         return NULL;
 273
 274     _mesa_init_renderbuffer(&rrb->base, 0);
 275     rrb->base.ClassID = RADEON_RB_CLASS;
 276
 277     /* XXX format junk */
 278     switch (format) {
 279         case GL_RGB5:
 280             rrb->base._ActualFormat = GL_RGB5;
 281             rrb->base._BaseFormat = GL_RGBA;
 282             rrb->base.RedBits = 5;
 283             rrb->base.GreenBits = 6;
 284             rrb->base.BlueBits = 5;
 285             rrb->base.DataType = GL_UNSIGNED_BYTE;
 286             break;
 287         case GL_RGB8:
 288             rrb->base._ActualFormat = GL_RGB8;
 289             rrb->base._BaseFormat = GL_RGB;
 290             rrb->base.RedBits = 8;
 291             rrb->base.GreenBits = 8;
 292             rrb->base.BlueBits = 8;
 293             rrb->base.AlphaBits = 8;
 294             rrb->base.DataType = GL_UNSIGNED_BYTE;
 295             break;
 296         case GL_RGBA8:
 297             rrb->base._ActualFormat = GL_RGBA8;
 298             rrb->base._BaseFormat = GL_RGBA;
 299             rrb->base.RedBits = 8;
 300             rrb->base.GreenBits = 8;
 301             rrb->base.BlueBits = 8;
 302             rrb->base.AlphaBits = 8;
 303             rrb->base.DataType = GL_UNSIGNED_BYTE;
 304             break;
 305         case GL_STENCIL_INDEX8_EXT:
 306             rrb->base._ActualFormat = GL_STENCIL_INDEX8_EXT;
 307             rrb->base._BaseFormat = GL_STENCIL_INDEX;
 308             rrb->base.StencilBits = 8;
 309             rrb->base.DataType = GL_UNSIGNED_BYTE;
 310             break;
 311         case GL_DEPTH_COMPONENT16:
 312             rrb->base._ActualFormat = GL_DEPTH_COMPONENT16;
 313             rrb->base._BaseFormat = GL_DEPTH_COMPONENT;
 314             rrb->base.DepthBits = 16;
 315             rrb->base.DataType = GL_UNSIGNED_SHORT;
 316             break;
 317         case GL_DEPTH_COMPONENT24:
 318             rrb->base._ActualFormat = GL_DEPTH24_STENCIL8_EXT;
 319             rrb->base._BaseFormat = GL_DEPTH_COMPONENT;
 320             rrb->base.DepthBits = 24;
 321             rrb->base.DataType = GL_UNSIGNED_INT;
 322             break;
 323         case GL_DEPTH24_STENCIL8_EXT:
 324             rrb->base._ActualFormat = GL_DEPTH24_STENCIL8_EXT;
 325             rrb->base._BaseFormat = GL_DEPTH_STENCIL_EXT;
 326             rrb->base.DepthBits = 24;
 327             rrb->base.StencilBits = 8;
 328             rrb->base.DataType = GL_UNSIGNED_INT_24_8_EXT;
 329             break;
 330         default:
 331             fprintf(stderr, "%s: Unknown format 0x%04x\n", __FUNCTION__, format);
 332             _mesa_delete_renderbuffer(&rrb->base);
 333             return NULL;
 334     }
 335
 336     rrb->dPriv = driDrawPriv;
 337     rrb->base.InternalFormat = format;
 338
 339     rrb->base.Delete = radeon_delete_renderbuffer;
 340     rrb->base.AllocStorage = radeon_alloc_window_storage;
 341     rrb->base.GetPointer = radeon_get_pointer;
 342
 343     rrb->bo = NULL;
 344     return rrb;
 345 }
 346
 347 static struct gl_renderbuffer *
 348 radeon_new_renderbuffer(GLcontext * ctx, GLuint name)
 349 {
 350   struct radeon_renderbuffer *rrb;
 351
 352   rrb = CALLOC_STRUCT(radeon_renderbuffer);
 353   if (!rrb)
 354     return NULL;
 355
 356   _mesa_init_renderbuffer(&rrb->base, name);
 357   rrb->base.ClassID = RADEON_RB_CLASS;
 358
 359   rrb->base.Delete = radeon_delete_renderbuffer;
 360   rrb->base.AllocStorage = radeon_alloc_renderbuffer_storage;
 361   rrb->base.GetPointer = radeon_get_pointer;
 362
 363   return &rrb->base;
 364 }
 365
 366 static void
 367 radeon_bind_framebuffer(GLcontext * ctx, GLenum target,
 368                        struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 369 {
 370    if (target == GL_FRAMEBUFFER_EXT || target == GL_DRAW_FRAMEBUFFER_EXT) {
 371       radeon_draw_buffer(ctx, fb);
 372    }
 373    else {
 374       /* don't need to do anything if target == GL_READ_FRAMEBUFFER_EXT */
 375    }
 376 }
 377
 378 static void
 379 radeon_framebuffer_renderbuffer(GLcontext * ctx,
 380                                struct gl_framebuffer *fb,
 381                                GLenum attachment, struct gl_renderbuffer *rb)
 382 {
 383
 384    ctx->Driver.Flush(ctx); /* +r6/r7 */
 385
 386    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 387    radeon_draw_buffer(ctx, fb);
 388 }
 389
 390
 391 static GLboolean
 392 radeon_update_wrapper(GLcontext *ctx, struct radeon_renderbuffer *rrb,
 393                      struct gl_texture_image *texImage)
 394 {
 395         int retry = 0;
 396 restart:
 397         if (texImage->TexFormat == &_mesa_texformat_argb8888) {
 398                 rrb->cpp = 4;
 399                 rrb->base._ActualFormat = GL_RGBA8;
 400                 rrb->base._BaseFormat = GL_RGBA;
 401                 rrb->base.DataType = GL_UNSIGNED_BYTE;
 402                 DBG("Render to RGBA8 texture OK\n");
 403         }
 404         else if (texImage->TexFormat == &_mesa_texformat_rgb565) {
 405                 rrb->cpp = 2;
 406                 rrb->base._ActualFormat = GL_RGB5;
 407                 rrb->base._BaseFormat = GL_RGB;
 408                 rrb->base.DataType = GL_UNSIGNED_SHORT;
 409                 DBG("Render to RGB5 texture OK\n");
 410         }
 411         else if (texImage->TexFormat == &_mesa_texformat_z16) {
 412                 rrb->cpp = 2;
 413                 rrb->base._ActualFormat = GL_DEPTH_COMPONENT16;
 414                 rrb->base._BaseFormat = GL_DEPTH_COMPONENT;
 415                 rrb->base.DataType = GL_UNSIGNED_SHORT;
 416                 DBG("Render to DEPTH16 texture OK\n");
 417         }
 418         else if (texImage->TexFormat == &_mesa_texformat_s8_z24) {
 419                 rrb->cpp = 4;
 420                 rrb->base._ActualFormat = GL_DEPTH24_STENCIL8_EXT;
 421                 rrb->base._BaseFormat = GL_DEPTH_STENCIL_EXT;
 422                 rrb->base.DataType = GL_UNSIGNED_INT_24_8_EXT;
 423                 DBG("Render to DEPTH_STENCIL texture OK\n");
 424         }
 425         else {
 426                 /* try redoing the FBO */
 427                 if (retry == 1) {
 428                         DBG("Render to texture BAD FORMAT %d\n",
 429                             texImage->TexFormat->MesaFormat);
 430                         return GL_FALSE;
 431                 }
 432                 texImage->TexFormat = radeonChooseTextureFormat(ctx, texImage->InternalFormat, 0,
 433                                                                 texImage->TexFormat->DataType,
 434                                                                 1);
 435
 436                 retry++;
 437                 goto restart;
 438         }
 439
 440         rrb->pitch = texImage->Width * rrb->cpp;
 441         rrb->base.InternalFormat = rrb->base._ActualFormat;
 442         rrb->base.Width = texImage->Width;
 443         rrb->base.Height = texImage->Height;
 444         rrb->base.RedBits = texImage->TexFormat->RedBits;
 445         rrb->base.GreenBits = texImage->TexFormat->GreenBits;
 446         rrb->base.BlueBits = texImage->TexFormat->BlueBits;
 447         rrb->base.AlphaBits = texImage->TexFormat->AlphaBits;
 448         rrb->base.DepthBits = texImage->TexFormat->DepthBits;
 449
 450         rrb->base.Delete = radeon_delete_renderbuffer;
 451         rrb->base.AllocStorage = radeon_nop_alloc_storage;
 452
 453         return GL_TRUE;
 454 }
 455
 456
 457 static struct radeon_renderbuffer *
 458 radeon_wrap_texture(GLcontext * ctx, struct gl_texture_image *texImage)
 459 {
 460   const GLuint name = ~0;   /* not significant, but distinct for debugging */
 461   struct radeon_renderbuffer *rrb;
 462
 463    /* make an radeon_renderbuffer to wrap the texture image */
 464    rrb = CALLOC_STRUCT(radeon_renderbuffer);
 465    if (!rrb) {
 466       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture");
 467       return NULL;
 468    }
 469
 470    _mesa_init_renderbuffer(&rrb->base, name);
 471    rrb->base.ClassID = RADEON_RB_CLASS;
 472
 473    if (!radeon_update_wrapper(ctx, rrb, texImage)) {
 474       _mesa_free(rrb);
 475       return NULL;
 476    }
 477
 478    return rrb;
 479
 480 }
 481 static void
 482 radeon_render_texture(GLcontext * ctx,
 483                      struct gl_framebuffer *fb,
 484                      struct gl_renderbuffer_attachment *att)
 485 {
 486    struct gl_texture_image *newImage
 487       = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
 488    struct radeon_renderbuffer *rrb = radeon_renderbuffer(att->Renderbuffer);
 489    radeon_texture_image *radeon_image;
 490    GLuint imageOffset;
 491
 492    (void) fb;
 493
 494    ASSERT(newImage);
 495
 496    if (newImage->Border != 0) {
 497       /* Fallback on drawing to a texture with a border, which won't have a
 498        * miptree.
 499        */
 500       _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 501       _mesa_render_texture(ctx, fb, att);
 502       return;
 503    }
 504    else if (!rrb) {
 505       rrb = radeon_wrap_texture(ctx, newImage);
 506       if (rrb) {
 507          /* bind the wrapper to the attachment point */
 508          _mesa_reference_renderbuffer(&att->Renderbuffer, &rrb->base);
 509       }
 510       else {
 511          /* fallback to software rendering */
 512          _mesa_render_texture(ctx, fb, att);
 513          return;
 514       }
 515    }
 516
 517    if (!radeon_update_wrapper(ctx, rrb, newImage)) {
 518        _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 519        _mesa_render_texture(ctx, fb, att);
 520        return;
 521    }
 522
 523    DBG("Begin render texture tid %x tex=%u w=%d h=%d refcount=%d\n",
 524        _glthread_GetID(),
 525        att->Texture->Name, newImage->Width, newImage->Height,
 526        rrb->base.RefCount);
 527
 528    /* point the renderbufer's region to the texture image region */
 529    radeon_image = (radeon_texture_image *)newImage;
 530    if (rrb->bo != radeon_image->mt->bo) {
 531       if (rrb->bo)
 532         radeon_bo_unref(rrb->bo);
 533       rrb->bo = radeon_image->mt->bo;
 534       radeon_bo_ref(rrb->bo);
 535    }
 536
 537    /* compute offset of the particular 2D image within the texture region */
 538    imageOffset = radeon_miptree_image_offset(radeon_image->mt,
 539                                             att->CubeMapFace,
 540                                             att->TextureLevel);
 541
 542    if (att->Texture->Target == GL_TEXTURE_3D) {
 543       GLuint offsets[6];
 544       radeon_miptree_depth_offsets(radeon_image->mt, att->TextureLevel,
 545                                    offsets);
 546       imageOffset += offsets[att->Zoffset];
 547    }
 548
 549    /* store that offset in the region */
 550    rrb->draw_offset = imageOffset;
 551
 552    /* update drawing region, etc */
 553    radeon_draw_buffer(ctx, fb);
 554 }
 555
 556 static void
 557 radeon_finish_render_texture(GLcontext * ctx,
 558                             struct gl_renderbuffer_attachment *att)
 559 {
 560
 561 }
 562 static void
 563 radeon_validate_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb)
 564 {
 565 }
 566
 567 static void
 568 radeon_blit_framebuffer(GLcontext *ctx,
 569                        GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
 570                        GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
 571                        GLbitfield mask, GLenum filter)
 572 {
 573 }
 574
 575 void radeon_fbo_init(struct radeon_context *radeon)
 576 {
 577   radeon->glCtx->Driver.NewFramebuffer = radeon_new_framebuffer;
 578   radeon->glCtx->Driver.NewRenderbuffer = radeon_new_renderbuffer;
 579   radeon->glCtx->Driver.BindFramebuffer = radeon_bind_framebuffer;
 580   radeon->glCtx->Driver.FramebufferRenderbuffer = radeon_framebuffer_renderbuffer;
 581   radeon->glCtx->Driver.RenderTexture = radeon_render_texture;
 582   radeon->glCtx->Driver.FinishRenderTexture = radeon_finish_render_texture;
 583   radeon->glCtx->Driver.ResizeBuffers = radeon_resize_buffers;
 584   radeon->glCtx->Driver.ValidateFramebuffer = radeon_validate_framebuffer;
 585   radeon->glCtx->Driver.BlitFramebuffer = radeon_blit_framebuffer;
 586 }
 587
 588
 589 void radeon_renderbuffer_set_bo(struct radeon_renderbuffer *rb,
 590                                 struct radeon_bo *bo)
 591 {
 592   struct radeon_bo *old;
 593   old = rb->bo;
 594   rb->bo = bo;
 595   radeon_bo_ref(bo);
 596   if (old)
 597     radeon_bo_unref(old);
 598 }