src/mesa/drivers/dri/nouveau/nouveau_texture.c

   1 /*
   2  * Copyright (C) 2009 Francisco Jerez.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "nouveau_driver.h"
  28 #include "nouveau_context.h"
  29 #include "nouveau_texture.h"
  30 #include "nouveau_fbo.h"
  31 #include "nouveau_util.h"
  32
  33 #include "main/pbo.h"
  34 #include "main/texobj.h"
  35 #include "main/texstore.h"
  36 #include "main/texformat.h"
  37 #include "main/texcompress.h"
  38 #include "main/texgetimage.h"
  39 #include "main/mipmap.h"
  40 #include "main/teximage.h"
  41 #include "drivers/common/meta.h"
  42 #include "swrast/s_texfetch.h"
  43
  44 static struct gl_texture_object *
  45 nouveau_texture_new(struct gl_context *ctx, GLuint name, GLenum target)
  46 {
  47         struct nouveau_texture *nt = CALLOC_STRUCT(nouveau_texture);
  48
  49         _mesa_initialize_texture_object(ctx, &nt->base, name, target);
  50
  51         return &nt->base;
  52 }
  53
  54 static void
  55 nouveau_texture_free(struct gl_context *ctx, struct gl_texture_object *t)
  56 {
  57         struct nouveau_texture *nt = to_nouveau_texture(t);
  58         int i;
  59
  60         for (i = 0; i < MAX_TEXTURE_LEVELS; i++)
  61                 nouveau_surface_ref(NULL, &nt->surfaces[i]);
  62
  63         _mesa_delete_texture_object(ctx, t);
  64 }
  65
  66 static struct gl_texture_image *
  67 nouveau_teximage_new(struct gl_context *ctx)
  68 {
  69         struct nouveau_teximage *nti = CALLOC_STRUCT(nouveau_teximage);
  70
  71         return &nti->base.Base;
  72 }
  73
  74 static void
  75 nouveau_teximage_free(struct gl_context *ctx, struct gl_texture_image *ti)
  76 {
  77         struct nouveau_teximage *nti = to_nouveau_teximage(ti);
  78
  79         nouveau_surface_ref(NULL, &nti->surface);
  80 }
  81
  82 static void
  83 nouveau_map_texture_image(struct gl_context *ctx,
  84                           struct gl_texture_image *ti,
  85                           GLuint slice,
  86                           GLuint x, GLuint y, GLuint w, GLuint h,
  87                           GLbitfield mode,
  88                           GLubyte **map,
  89                           GLint *stride)
  90 {
  91         struct nouveau_teximage *nti = to_nouveau_teximage(ti);
  92         struct nouveau_surface *s = &nti->surface;
  93         struct nouveau_surface *st = &nti->transfer.surface;
  94         struct nouveau_client *client = context_client(ctx);
  95
  96         /* Nouveau has no support for 3D or cubemap textures. */
  97         assert(slice == 0);
  98
  99         if (s->bo) {
 100                 if (!(mode & GL_MAP_READ_BIT) &&
 101                     nouveau_pushbuf_refd(context_push(ctx), s->bo)) {
 102                         unsigned size;
 103                         /*
 104                          * Heuristic: use a bounce buffer to pipeline
 105                          * teximage transfers.
 106                          */
 107                         st->layout = LINEAR;
 108                         st->format = s->format;
 109                         st->cpp = s->cpp;
 110                         st->width = w;
 111                         st->height = h;
 112                         st->pitch = s->pitch;
 113                         nti->transfer.x = x;
 114                         nti->transfer.y = y;
 115
 116                         size = get_format_blocksy(st->format, h) * st->pitch;
 117                         *map = nouveau_get_scratch(ctx, size,
 118                                           &st->bo, &st->offset);
 119                         *stride = st->pitch;
 120                 } else {
 121                         int ret, flags = 0;
 122
 123                         if (mode & GL_MAP_READ_BIT)
 124                                 flags |= NOUVEAU_BO_RD;
 125                         if (mode & GL_MAP_WRITE_BIT)
 126                                 flags |= NOUVEAU_BO_WR;
 127
 128                         if (!s->bo->map) {
 129                                 ret = nouveau_bo_map(s->bo, flags, client);
 130                                 assert(!ret);
 131                         }
 132
 133                         *map = s->bo->map +
 134                                 get_format_blocksy(s->format, y) * s->pitch +
 135                                 get_format_blocksx(s->format, x) * s->cpp;
 136                         *stride = s->pitch;
 137                 }
 138         } else {
 139                 *map = nti->base.Buffer +
 140                         get_format_blocksy(s->format, y) * s->pitch +
 141                         get_format_blocksx(s->format, x) * s->cpp;
 142                 *stride = s->pitch;
 143         }
 144 }
 145
 146 static void
 147 nouveau_unmap_texture_image(struct gl_context *ctx, struct gl_texture_image *ti,
 148                             GLuint slice)
 149 {
 150         struct nouveau_teximage *nti = to_nouveau_teximage(ti);
 151         struct nouveau_surface *s = &nti->surface;
 152         struct nouveau_surface *st = &nti->transfer.surface;
 153
 154         if (st->bo) {
 155                 context_drv(ctx)->surface_copy(ctx, s, st, nti->transfer.x,
 156                                                nti->transfer.y, 0, 0,
 157                                                st->width, st->height);
 158                 nouveau_surface_ref(NULL, st);
 159
 160         }
 161 }
 162
 163 static mesa_format
 164 nouveau_choose_tex_format(struct gl_context *ctx, GLenum target,
 165                           GLint internalFormat,
 166                           GLenum srcFormat, GLenum srcType)
 167 {
 168         switch (internalFormat) {
 169         case 4:
 170         case GL_RGBA:
 171         case GL_RGBA2:
 172         case GL_RGBA4:
 173         case GL_RGBA8:
 174         case GL_RGBA12:
 175         case GL_RGBA16:
 176         case GL_RGB10_A2:
 177         case GL_COMPRESSED_RGBA:
 178                 return MESA_FORMAT_B8G8R8A8_UNORM;
 179         case GL_RGB5_A1:
 180                 return MESA_FORMAT_ARGB1555;
 181
 182         case GL_RGB:
 183         case GL_RGB8:
 184         case GL_RGB10:
 185         case GL_RGB12:
 186         case GL_RGB16:
 187         case GL_COMPRESSED_RGB:
 188                 return MESA_FORMAT_B8G8R8X8_UNORM;
 189         case 3:
 190         case GL_R3_G3_B2:
 191         case GL_RGB4:
 192         case GL_RGB5:
 193                 return MESA_FORMAT_RGB565;
 194
 195         case 2:
 196         case GL_LUMINANCE_ALPHA:
 197         case GL_LUMINANCE4_ALPHA4:
 198         case GL_LUMINANCE6_ALPHA2:
 199         case GL_LUMINANCE12_ALPHA4:
 200         case GL_LUMINANCE12_ALPHA12:
 201         case GL_LUMINANCE16_ALPHA16:
 202         case GL_LUMINANCE8_ALPHA8:
 203         case GL_COMPRESSED_LUMINANCE_ALPHA:
 204                 return MESA_FORMAT_B8G8R8A8_UNORM;
 205
 206         case 1:
 207         case GL_LUMINANCE:
 208         case GL_LUMINANCE4:
 209         case GL_LUMINANCE12:
 210         case GL_LUMINANCE16:
 211         case GL_LUMINANCE8:
 212         case GL_COMPRESSED_LUMINANCE:
 213                 return MESA_FORMAT_L8;
 214
 215         case GL_ALPHA:
 216         case GL_ALPHA4:
 217         case GL_ALPHA12:
 218         case GL_ALPHA16:
 219         case GL_ALPHA8:
 220         case GL_COMPRESSED_ALPHA:
 221                 return MESA_FORMAT_A8;
 222
 223         case GL_INTENSITY:
 224         case GL_INTENSITY4:
 225         case GL_INTENSITY12:
 226         case GL_INTENSITY16:
 227         case GL_INTENSITY8:
 228                 return MESA_FORMAT_I8;
 229
 230         case GL_RGB_S3TC:
 231         case GL_RGB4_S3TC:
 232         case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
 233                 return MESA_FORMAT_RGB_DXT1;
 234
 235         case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
 236                 return MESA_FORMAT_RGBA_DXT1;
 237
 238         case GL_RGBA_S3TC:
 239         case GL_RGBA4_S3TC:
 240         case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
 241                 return MESA_FORMAT_RGBA_DXT3;
 242
 243         case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
 244                 return MESA_FORMAT_RGBA_DXT5;
 245
 246         default:
 247                 assert(0);
 248         }
 249 }
 250
 251 static GLboolean
 252 teximage_fits(struct gl_texture_object *t, int level)
 253 {
 254         struct nouveau_surface *s = &to_nouveau_texture(t)->surfaces[level];
 255         struct gl_texture_image *ti = t->Image[0][level];
 256
 257         if (!ti || !to_nouveau_teximage(ti)->surface.bo)
 258                 return GL_FALSE;
 259
 260         if (level == t->BaseLevel && (s->offset & 0x7f))
 261                 return GL_FALSE;
 262
 263         return t->Target == GL_TEXTURE_RECTANGLE ||
 264                 (s->bo && s->format == ti->TexFormat &&
 265                  s->width == ti->Width && s->height == ti->Height);
 266 }
 267
 268 static GLboolean
 269 validate_teximage(struct gl_context *ctx, struct gl_texture_object *t,
 270                   int level, int x, int y, int z,
 271                   int width, int height, int depth)
 272 {
 273         struct gl_texture_image *ti = t->Image[0][level];
 274
 275         if (teximage_fits(t, level)) {
 276                 struct nouveau_surface *ss = to_nouveau_texture(t)->surfaces;
 277                 struct nouveau_surface *s = &to_nouveau_teximage(ti)->surface;
 278
 279                 if (t->Target == GL_TEXTURE_RECTANGLE)
 280                         nouveau_surface_ref(s, &ss[level]);
 281                 else
 282                         context_drv(ctx)->surface_copy(ctx, &ss[level], s,
 283                                                        x, y, x, y,
 284                                                        width, height);
 285
 286                 return GL_TRUE;
 287         }
 288
 289         return GL_FALSE;
 290 }
 291
 292 static int
 293 get_last_level(struct gl_texture_object *t)
 294 {
 295         struct gl_texture_image *base = t->Image[0][t->BaseLevel];
 296
 297         if (t->Sampler.MinFilter == GL_NEAREST ||
 298             t->Sampler.MinFilter == GL_LINEAR || !base)
 299                 return t->BaseLevel;
 300         else
 301                 return MIN2(t->BaseLevel + base->MaxNumLevels - 1, t->MaxLevel);
 302 }
 303
 304 static void
 305 relayout_texture(struct gl_context *ctx, struct gl_texture_object *t)
 306 {
 307         struct gl_texture_image *base = t->Image[0][t->BaseLevel];
 308
 309         if (base && t->Target != GL_TEXTURE_RECTANGLE) {
 310                 struct nouveau_surface *ss = to_nouveau_texture(t)->surfaces;
 311                 struct nouveau_surface *s = &to_nouveau_teximage(base)->surface;
 312                 int i, ret, last = get_last_level(t);
 313                 enum nouveau_surface_layout layout =
 314                         (_mesa_is_format_compressed(s->format) ? LINEAR : SWIZZLED);
 315                 unsigned size, pitch, offset = 0,
 316                         width = s->width,
 317                         height = s->height;
 318
 319                 /* Deallocate the old storage. */
 320                 for (i = 0; i < MAX_TEXTURE_LEVELS; i++)
 321                         nouveau_bo_ref(NULL, &ss[i].bo);
 322
 323                 /* Relayout the mipmap tree. */
 324                 for (i = t->BaseLevel; i <= last; i++) {
 325                         pitch = _mesa_format_row_stride(s->format, width);
 326                         size = get_format_blocksy(s->format, height) * pitch;
 327
 328                         /* Images larger than 16B have to be aligned. */
 329                         if (size > 16)
 330                                 offset = align(offset, 64);
 331
 332                         ss[i] = (struct nouveau_surface) {
 333                                 .offset = offset,
 334                                 .layout = layout,
 335                                 .format = s->format,
 336                                 .width = width,
 337                                 .height = height,
 338                                 .cpp = s->cpp,
 339                                 .pitch = pitch,
 340                         };
 341
 342                         offset += size;
 343                         width = minify(width, 1);
 344                         height = minify(height, 1);
 345                 }
 346
 347                 /* Get new storage. */
 348                 size = align(offset, 64);
 349
 350                 ret = nouveau_bo_new(context_dev(ctx), NOUVEAU_BO_MAP |
 351                                      NOUVEAU_BO_GART | NOUVEAU_BO_VRAM,
 352                                      0, size, NULL, &ss[last].bo);
 353                 assert(!ret);
 354
 355                 for (i = t->BaseLevel; i < last; i++)
 356                         nouveau_bo_ref(ss[last].bo, &ss[i].bo);
 357         }
 358 }
 359
 360 GLboolean
 361 nouveau_texture_validate(struct gl_context *ctx, struct gl_texture_object *t)
 362 {
 363         struct nouveau_texture *nt = to_nouveau_texture(t);
 364         int i, last = get_last_level(t);
 365
 366         if (!teximage_fits(t, t->BaseLevel) ||
 367             !teximage_fits(t, last))
 368                 return GL_FALSE;
 369
 370         if (nt->dirty) {
 371                 nt->dirty = GL_FALSE;
 372
 373                 /* Copy the teximages to the actual miptree. */
 374                 for (i = t->BaseLevel; i <= last; i++) {
 375                         struct nouveau_surface *s = &nt->surfaces[i];
 376
 377                         validate_teximage(ctx, t, i, 0, 0, 0,
 378                                           s->width, s->height, 1);
 379                 }
 380
 381                 PUSH_KICK(context_push(ctx));
 382         }
 383
 384         return GL_TRUE;
 385 }
 386
 387 void
 388 nouveau_texture_reallocate(struct gl_context *ctx, struct gl_texture_object *t)
 389 {
 390         if (!teximage_fits(t, t->BaseLevel) ||
 391             !teximage_fits(t, get_last_level(t))) {
 392                 texture_dirty(t);
 393                 relayout_texture(ctx, t);
 394                 nouveau_texture_validate(ctx, t);
 395         }
 396 }
 397
 398 static unsigned
 399 get_teximage_placement(struct gl_texture_image *ti)
 400 {
 401         if (ti->TexFormat == MESA_FORMAT_A8 ||
 402             ti->TexFormat == MESA_FORMAT_L8 ||
 403             ti->TexFormat == MESA_FORMAT_I8)
 404                 /* 1 cpp formats will have to be swizzled by the CPU,
 405                  * so leave them in system RAM for now. */
 406                 return NOUVEAU_BO_MAP;
 407         else
 408                 return NOUVEAU_BO_GART | NOUVEAU_BO_MAP;
 409 }
 410
 411 static void
 412 nouveau_teximage(struct gl_context *ctx, GLint dims,
 413                  struct gl_texture_image *ti,
 414                  GLsizei imageSize,
 415                  GLenum format, GLenum type, const GLvoid *pixels,
 416                  const struct gl_pixelstore_attrib *packing,
 417                  GLboolean compressed)
 418 {
 419         struct gl_texture_object *t = ti->TexObject;
 420         const GLuint level = ti->Level;
 421         struct nouveau_surface *s = &to_nouveau_teximage(ti)->surface;
 422         struct nouveau_teximage *nti = to_nouveau_teximage(ti);
 423         int ret;
 424         GLuint depth = compressed ? 1 : ti->Depth;
 425
 426         /* Allocate a new bo for the image. */
 427         nouveau_surface_alloc(ctx, s, LINEAR, get_teximage_placement(ti),
 428                               ti->TexFormat, ti->Width, ti->Height);
 429         nti->base.RowStride = s->pitch / s->cpp;
 430
 431         if (compressed)
 432                 pixels = _mesa_validate_pbo_compressed_teximage(ctx,
 433                         dims, imageSize,
 434                         pixels, packing, "glCompressedTexImage");
 435         else
 436                 pixels = _mesa_validate_pbo_teximage(ctx,
 437                         dims, ti->Width, ti->Height, depth, format, type,
 438                         pixels, packing, "glTexImage");
 439
 440         if (pixels) {
 441                 GLubyte *map;
 442                 int row_stride;
 443
 444                 /* Store the pixel data. */
 445                 nouveau_map_texture_image(ctx, ti, 0,
 446                                           0, 0, ti->Width, ti->Height,
 447                                           GL_MAP_WRITE_BIT,
 448                                           &map, &row_stride);
 449
 450                 ret = _mesa_texstore(ctx, dims, ti->_BaseFormat,
 451                                      ti->TexFormat,
 452                                      row_stride,
 453                                      &map,
 454                                      ti->Width, ti->Height, depth,
 455                                      format, type, pixels, packing);
 456                 assert(ret);
 457
 458                 nouveau_unmap_texture_image(ctx, ti, 0);
 459                 _mesa_unmap_teximage_pbo(ctx, packing);
 460
 461                 if (!validate_teximage(ctx, t, level, 0, 0, 0,
 462                                        ti->Width, ti->Height, depth))
 463                         /* It doesn't fit, mark it as dirty. */
 464                         texture_dirty(t);
 465         }
 466
 467         if (level == t->BaseLevel) {
 468                 if (!teximage_fits(t, level))
 469                         relayout_texture(ctx, t);
 470                 nouveau_texture_validate(ctx, t);
 471         }
 472
 473         context_dirty_i(ctx, TEX_OBJ, ctx->Texture.CurrentUnit);
 474         context_dirty_i(ctx, TEX_ENV, ctx->Texture.CurrentUnit);
 475 }
 476
 477
 478 static void
 479 nouveau_teximage_123d(struct gl_context *ctx, GLuint dims,
 480                       struct gl_texture_image *ti,
 481                       GLenum format, GLenum type, const GLvoid *pixels,
 482                       const struct gl_pixelstore_attrib *packing)
 483 {
 484         nouveau_teximage(ctx, dims, ti, 0, format, type, pixels,
 485                          packing, GL_FALSE);
 486 }
 487
 488 static void
 489 nouveau_compressed_teximage(struct gl_context *ctx, GLuint dims,
 490                     struct gl_texture_image *ti,
 491                     GLsizei imageSize, const GLvoid *data)
 492 {
 493         nouveau_teximage(ctx, 2, ti, imageSize, 0, 0, data,
 494                          &ctx->Unpack, GL_TRUE);
 495 }
 496
 497 static GLboolean
 498 nouveau_teximage_alloc(struct gl_context *ctx, struct gl_texture_image *ti)
 499 {
 500         nouveau_teximage(ctx, 3, ti, 0, 0, 0, NULL,
 501                          &ctx->DefaultPacking, GL_FALSE);
 502         return GL_TRUE;
 503 }
 504
 505 static void
 506 nouveau_texsubimage(struct gl_context *ctx, GLint dims,
 507                     struct gl_texture_image *ti,
 508                     GLint xoffset, GLint yoffset, GLint zoffset,
 509                     GLint width, GLint height, GLint depth,
 510                     GLsizei imageSize,
 511                     GLenum format, GLenum type, const void *pixels,
 512                     const struct gl_pixelstore_attrib *packing,
 513                     GLboolean compressed)
 514 {
 515         int ret;
 516
 517         if (compressed)
 518                 pixels = _mesa_validate_pbo_compressed_teximage(ctx,
 519                                 dims, imageSize,
 520                                 pixels, packing, "glCompressedTexSubImage");
 521         else
 522                 pixels = _mesa_validate_pbo_teximage(ctx,
 523                                 dims, width, height, depth, format, type,
 524                                 pixels, packing, "glTexSubImage");
 525
 526         if (pixels) {
 527                 GLubyte *map;
 528                 int row_stride;
 529
 530                 nouveau_map_texture_image(ctx, ti, 0,
 531                                           xoffset, yoffset, width, height,
 532                                           GL_MAP_WRITE_BIT, &map, &row_stride);
 533
 534                 ret = _mesa_texstore(ctx, dims, ti->_BaseFormat, ti->TexFormat,
 535                                      row_stride, &map,
 536                                      width, height, depth,
 537                                      format, type, pixels, packing);
 538                 assert(ret);
 539
 540                 nouveau_unmap_texture_image(ctx, ti, 0);
 541                 _mesa_unmap_teximage_pbo(ctx, packing);
 542         }
 543
 544         if (!to_nouveau_texture(ti->TexObject)->dirty)
 545                 validate_teximage(ctx, ti->TexObject, ti->Level,
 546                                   xoffset, yoffset, zoffset,
 547                                   width, height, depth);
 548 }
 549
 550 static void
 551 nouveau_texsubimage_123d(struct gl_context *ctx, GLuint dims,
 552                          struct gl_texture_image *ti,
 553                          GLint xoffset, GLint yoffset, GLint zoffset,
 554                          GLint width, GLint height, GLint depth,
 555                          GLenum format, GLenum type, const void *pixels,
 556                          const struct gl_pixelstore_attrib *packing)
 557 {
 558         nouveau_texsubimage(ctx, dims, ti, xoffset, yoffset, zoffset,
 559                             width, height, depth, 0, format, type, pixels,
 560                             packing, GL_FALSE);
 561 }
 562
 563 static void
 564 nouveau_compressed_texsubimage(struct gl_context *ctx, GLuint dims,
 565                        struct gl_texture_image *ti,
 566                        GLint xoffset, GLint yoffset, GLint zoffset,
 567                        GLsizei width, GLint height, GLint depth,
 568                        GLenum format,
 569                        GLint imageSize, const void *data)
 570 {
 571         nouveau_texsubimage(ctx, dims, ti, xoffset, yoffset, zoffset,
 572                           width, height, depth, imageSize, format, 0, data,
 573                           &ctx->Unpack, GL_TRUE);
 574 }
 575
 576 static void
 577 nouveau_bind_texture(struct gl_context *ctx, GLenum target,
 578                      struct gl_texture_object *t)
 579 {
 580         context_dirty_i(ctx, TEX_OBJ, ctx->Texture.CurrentUnit);
 581         context_dirty_i(ctx, TEX_ENV, ctx->Texture.CurrentUnit);
 582 }
 583
 584 static mesa_format
 585 get_texbuffer_format(struct gl_renderbuffer *rb, GLint format)
 586 {
 587         struct nouveau_surface *s = &to_nouveau_renderbuffer(rb)->surface;
 588
 589         if (s->cpp < 4)
 590                 return s->format;
 591         else if (format == __DRI_TEXTURE_FORMAT_RGBA)
 592                 return MESA_FORMAT_B8G8R8A8_UNORM;
 593         else
 594                 return MESA_FORMAT_B8G8R8X8_UNORM;
 595 }
 596
 597 void
 598 nouveau_set_texbuffer(__DRIcontext *dri_ctx,
 599                       GLint target, GLint format,
 600                       __DRIdrawable *draw)
 601 {
 602         struct nouveau_context *nctx = dri_ctx->driverPrivate;
 603         struct gl_context *ctx = &nctx->base;
 604         struct gl_framebuffer *fb = draw->driverPrivate;
 605         struct gl_renderbuffer *rb =
 606                 fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer;
 607         struct gl_texture_object *t = _mesa_get_current_tex_object(ctx, target);
 608         struct gl_texture_image *ti;
 609         struct nouveau_teximage *nti;
 610         struct nouveau_surface *s;
 611
 612         _mesa_lock_texture(ctx, t);
 613         ti = _mesa_get_tex_image(ctx, t, target, 0);
 614         nti = to_nouveau_teximage(ti);
 615         s = &to_nouveau_teximage(ti)->surface;
 616
 617         /* Update the texture surface with the given drawable. */
 618         nouveau_update_renderbuffers(dri_ctx, draw);
 619         nouveau_surface_ref(&to_nouveau_renderbuffer(rb)->surface, s);
 620
 621         s->format = get_texbuffer_format(rb, format);
 622
 623         /* Update the image fields. */
 624         _mesa_init_teximage_fields(ctx, ti, s->width, s->height,
 625                                    1, 0, s->cpp, s->format);
 626         nti->base.RowStride = s->pitch / s->cpp;
 627
 628         /* Try to validate it. */
 629         if (!validate_teximage(ctx, t, 0, 0, 0, 0, s->width, s->height, 1))
 630                 nouveau_texture_reallocate(ctx, t);
 631
 632         context_dirty_i(ctx, TEX_OBJ, ctx->Texture.CurrentUnit);
 633         context_dirty_i(ctx, TEX_ENV, ctx->Texture.CurrentUnit);
 634
 635         _mesa_unlock_texture(ctx, t);
 636 }
 637
 638 void
 639 nouveau_texture_functions_init(struct dd_function_table *functions)
 640 {
 641         functions->NewTextureObject = nouveau_texture_new;
 642         functions->DeleteTexture = nouveau_texture_free;
 643         functions->NewTextureImage = nouveau_teximage_new;
 644         functions->FreeTextureImageBuffer = nouveau_teximage_free;
 645         functions->AllocTextureImageBuffer = nouveau_teximage_alloc;
 646         functions->ChooseTextureFormat = nouveau_choose_tex_format;
 647         functions->TexImage = nouveau_teximage_123d;
 648         functions->TexSubImage = nouveau_texsubimage_123d;
 649         functions->CompressedTexImage = nouveau_compressed_teximage;
 650         functions->CompressedTexSubImage = nouveau_compressed_texsubimage;
 651         functions->BindTexture = nouveau_bind_texture;
 652         functions->MapTextureImage = nouveau_map_texture_image;
 653         functions->UnmapTextureImage = nouveau_unmap_texture_image;
 654 }