src/gallium/drivers/r600/r600_texture.c

   1 /*
   2  * Copyright 2010 Jerome Glisse <glisse@freedesktop.org>
   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  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *      Jerome Glisse
  25  *      Corbin Simpson
  26  */
  27 #include <errno.h>
  28 #include <pipe/p_screen.h>
  29 #include <util/u_format.h>
  30 #include <util/u_math.h>
  31 #include <util/u_inlines.h>
  32 #include <util/u_memory.h>
  33 #include "state_tracker/drm_driver.h"
  34 #include "r600_pipe.h"
  35 #include "r600_resource.h"
  36 #include "r600_state_inlines.h"
  37 #include "r600d.h"
  38 #include "r600_formats.h"
  39
  40 extern struct u_resource_vtbl r600_texture_vtbl;
  41
  42 /* Copy from a tiled texture to a detiled one. */
  43 static void r600_copy_from_tiled_texture(struct pipe_context *ctx, struct r600_transfer *rtransfer)
  44 {
  45         struct pipe_transfer *transfer = (struct pipe_transfer*)rtransfer;
  46         struct pipe_resource *texture = transfer->resource;
  47         struct pipe_subresource subdst;
  48
  49         subdst.face = 0;
  50         subdst.level = 0;
  51         ctx->resource_copy_region(ctx, rtransfer->linear_texture,
  52                                 subdst, 0, 0, 0, texture, transfer->sr,
  53                                 transfer->box.x, transfer->box.y, transfer->box.z,
  54                                 transfer->box.width, transfer->box.height);
  55 }
  56
  57
  58 /* Copy from a detiled texture to a tiled one. */
  59 static void r600_copy_into_tiled_texture(struct pipe_context *ctx, struct r600_transfer *rtransfer)
  60 {
  61         struct pipe_transfer *transfer = (struct pipe_transfer*)rtransfer;
  62         struct pipe_resource *texture = transfer->resource;
  63         struct pipe_subresource subsrc;
  64
  65         subsrc.face = 0;
  66         subsrc.level = 0;
  67         ctx->resource_copy_region(ctx, texture, transfer->sr,
  68                                   transfer->box.x, transfer->box.y, transfer->box.z,
  69                                   rtransfer->linear_texture, subsrc,
  70                                   0, 0, 0,
  71                                   transfer->box.width, transfer->box.height);
  72
  73         ctx->flush(ctx, 0, NULL);
  74 }
  75
  76 static unsigned r600_texture_get_offset(struct r600_resource_texture *rtex,
  77                                         unsigned level, unsigned zslice,
  78                                         unsigned face)
  79 {
  80         unsigned offset = rtex->offset[level];
  81
  82         switch (rtex->resource.base.b.target) {
  83         case PIPE_TEXTURE_3D:
  84                 assert(face == 0);
  85                 return offset + zslice * rtex->layer_size[level];
  86         case PIPE_TEXTURE_CUBE:
  87                 assert(zslice == 0);
  88                 return offset + face * rtex->layer_size[level];
  89         default:
  90                 assert(zslice == 0 && face == 0);
  91                 return offset;
  92         }
  93 }
  94
  95 static unsigned r600_texture_get_stride(struct pipe_screen *screen,
  96                                         struct r600_resource_texture *rtex,
  97                                         unsigned level)
  98 {
  99         struct pipe_resource *ptex = &rtex->resource.base.b;
 100         struct radeon *radeon = (struct radeon *)screen->winsys;
 101         enum chip_class chipc = r600_get_family_class(radeon);
 102         unsigned width, stride;
 103
 104         if (rtex->pitch_override)
 105                 return rtex->pitch_override;
 106
 107         width = u_minify(ptex->width0, level);
 108
 109         stride = util_format_get_stride(ptex->format, align(width, 64));
 110         if (chipc == EVERGREEN)
 111                 stride = align(stride, 512);
 112         else
 113                 stride = align(stride, 256);
 114         return stride;
 115 }
 116
 117 static unsigned r600_texture_get_nblocksy(struct pipe_screen *screen,
 118                                           struct r600_resource_texture *rtex,
 119                                           unsigned level)
 120 {
 121         struct pipe_resource *ptex = &rtex->resource.base.b;
 122         unsigned height;
 123
 124         height = u_minify(ptex->height0, level);
 125         height = util_next_power_of_two(height);
 126         return util_format_get_nblocksy(ptex->format, height);
 127 }
 128
 129 /* Get a width in pixels from a stride in bytes. */
 130 static unsigned pitch_to_width(enum pipe_format format,
 131                                 unsigned pitch_in_bytes)
 132 {
 133     return (pitch_in_bytes / util_format_get_blocksize(format)) *
 134             util_format_get_blockwidth(format);
 135 }
 136
 137 static void r600_setup_miptree(struct pipe_screen *screen,
 138                                struct r600_resource_texture *rtex)
 139 {
 140         struct pipe_resource *ptex = &rtex->resource.base.b;
 141         struct radeon *radeon = (struct radeon *)screen->winsys;
 142         enum chip_class chipc = r600_get_family_class(radeon);
 143         unsigned pitch, size, layer_size, i, offset;
 144         unsigned nblocksy;
 145
 146         for (i = 0, offset = 0; i <= ptex->last_level; i++) {
 147                 pitch = r600_texture_get_stride(screen, rtex, i);
 148                 nblocksy = r600_texture_get_nblocksy(screen, rtex, i);
 149
 150                 layer_size = pitch * nblocksy;
 151
 152                 if (ptex->target == PIPE_TEXTURE_CUBE) {
 153                         if (chipc >= R700)
 154                                 size = layer_size * 8;
 155                         else
 156                                 size = layer_size * 6;
 157                 }
 158                 else
 159                         size = layer_size * u_minify(ptex->depth0, i);
 160                 rtex->offset[i] = offset;
 161                 rtex->layer_size[i] = layer_size;
 162                 rtex->pitch_in_bytes[i] = pitch;
 163                 rtex->pitch_in_pixels[i] = pitch_to_width(ptex->format, pitch);
 164                 offset += size;
 165         }
 166         rtex->size = offset;
 167 }
 168
 169 static struct r600_resource_texture *
 170 r600_texture_create_object(struct pipe_screen *screen,
 171                            const struct pipe_resource *base,
 172                            unsigned array_mode,
 173                            unsigned pitch_in_bytes_override,
 174                            unsigned max_buffer_size,
 175                            struct r600_bo *bo)
 176 {
 177         struct r600_resource_texture *rtex;
 178         struct r600_resource *resource;
 179         struct radeon *radeon = (struct radeon *)screen->winsys;
 180
 181         rtex = CALLOC_STRUCT(r600_resource_texture);
 182         if (rtex == NULL)
 183                 return NULL;
 184
 185         resource = &rtex->resource;
 186         resource->base.b = *base;
 187         resource->base.vtbl = &r600_texture_vtbl;
 188         pipe_reference_init(&resource->base.b.reference, 1);
 189         resource->base.b.screen = screen;
 190         resource->bo = bo;
 191         resource->domain = r600_domain_from_usage(resource->base.b.bind);
 192         rtex->pitch_override = pitch_in_bytes_override;
 193         rtex->array_mode = array_mode;
 194
 195         r600_setup_miptree(screen, rtex);
 196
 197         resource->size = rtex->size;
 198
 199         if (!resource->bo) {
 200                 resource->bo = r600_bo(radeon, rtex->size, 4096, 0);
 201                 if (!resource->bo) {
 202                         FREE(rtex);
 203                         return NULL;
 204                 }
 205         }
 206         return rtex;
 207 }
 208
 209 struct pipe_resource *r600_texture_create(struct pipe_screen *screen,
 210                                                 const struct pipe_resource *templ)
 211 {
 212         unsigned array_mode = 0;
 213
 214         return (struct pipe_resource *)r600_texture_create_object(screen, templ, array_mode,
 215                                                                   0, 0, NULL);
 216
 217 }
 218
 219 static void r600_texture_destroy(struct pipe_screen *screen,
 220                                  struct pipe_resource *ptex)
 221 {
 222         struct r600_resource_texture *rtex = (struct r600_resource_texture*)ptex;
 223         struct r600_resource *resource = &rtex->resource;
 224         struct radeon *radeon = (struct radeon *)screen->winsys;
 225
 226         if (rtex->flushed_depth_texture)
 227                 pipe_resource_reference((struct pipe_resource **)&rtex->flushed_depth_texture, NULL);
 228
 229         if (resource->bo) {
 230                 r600_bo_reference(radeon, &resource->bo, NULL);
 231         }
 232         FREE(rtex);
 233 }
 234
 235 static struct pipe_surface *r600_get_tex_surface(struct pipe_screen *screen,
 236                                                 struct pipe_resource *texture,
 237                                                 unsigned face, unsigned level,
 238                                                 unsigned zslice, unsigned flags)
 239 {
 240         struct r600_resource_texture *rtex = (struct r600_resource_texture*)texture;
 241         struct pipe_surface *surface = CALLOC_STRUCT(pipe_surface);
 242         unsigned offset;
 243
 244         if (surface == NULL)
 245                 return NULL;
 246         offset = r600_texture_get_offset(rtex, level, zslice, face);
 247         pipe_reference_init(&surface->reference, 1);
 248         pipe_resource_reference(&surface->texture, texture);
 249         surface->format = texture->format;
 250         surface->width = u_minify(texture->width0, level);
 251         surface->height = u_minify(texture->height0, level);
 252         surface->offset = offset;
 253         surface->usage = flags;
 254         surface->zslice = zslice;
 255         surface->texture = texture;
 256         surface->face = face;
 257         surface->level = level;
 258         return surface;
 259 }
 260
 261 static void r600_tex_surface_destroy(struct pipe_surface *surface)
 262 {
 263         pipe_resource_reference(&surface->texture, NULL);
 264         FREE(surface);
 265 }
 266
 267
 268 struct pipe_resource *r600_texture_from_handle(struct pipe_screen *screen,
 269                                                const struct pipe_resource *templ,
 270                                                struct winsys_handle *whandle)
 271 {
 272         struct radeon *rw = (struct radeon*)screen->winsys;
 273         struct r600_bo *bo = NULL;
 274
 275         /* Support only 2D textures without mipmaps */
 276         if ((templ->target != PIPE_TEXTURE_2D && templ->target != PIPE_TEXTURE_RECT) ||
 277               templ->depth0 != 1 || templ->last_level != 0)
 278                 return NULL;
 279
 280         bo = r600_bo_handle(rw, whandle->handle);
 281         if (bo == NULL) {
 282                 return NULL;
 283         }
 284
 285         return (struct pipe_resource *)r600_texture_create_object(screen, templ, 0,
 286                                                                   whandle->stride,
 287                                                                   0,
 288                                                                   bo);
 289 }
 290
 291 static unsigned int r600_texture_is_referenced(struct pipe_context *context,
 292                                                 struct pipe_resource *texture,
 293                                                 unsigned face, unsigned level)
 294 {
 295         /* FIXME */
 296         return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 297 }
 298
 299 int (*r600_blit_uncompress_depth_ptr)(struct pipe_context *ctx, struct r600_resource_texture *texture);
 300
 301 int r600_texture_depth_flush(struct pipe_context *ctx,
 302                              struct pipe_resource *texture)
 303 {
 304         struct r600_resource_texture *rtex = (struct r600_resource_texture*)texture;
 305         struct pipe_resource resource;
 306
 307         if (rtex->flushed_depth_texture)
 308                 goto out;
 309
 310         resource.target = PIPE_TEXTURE_2D;
 311         resource.format = texture->format;
 312         resource.width0 = texture->width0;
 313         resource.height0 = texture->height0;
 314         resource.depth0 = 1;
 315         resource.last_level = 0;
 316         resource.nr_samples = 0;
 317         resource.usage = PIPE_USAGE_DYNAMIC;
 318         resource.bind = 0;
 319         resource.flags = 0;
 320
 321         resource.bind |= PIPE_BIND_DEPTH_STENCIL;
 322
 323         rtex->flushed_depth_texture = (struct r600_resource_texture *)ctx->screen->resource_create(ctx->screen, &resource);
 324         if (rtex->flushed_depth_texture == NULL) {
 325                 R600_ERR("failed to create temporary texture to hold untiled copy\n");
 326                 return -ENOMEM;
 327         }
 328
 329 out:
 330         r600_blit_uncompress_depth_ptr(ctx, rtex);
 331         return 0;
 332 }
 333
 334 struct pipe_transfer* r600_texture_get_transfer(struct pipe_context *ctx,
 335                                                 struct pipe_resource *texture,
 336                                                 struct pipe_subresource sr,
 337                                                 unsigned usage,
 338                                                 const struct pipe_box *box)
 339 {
 340         struct r600_resource_texture *rtex = (struct r600_resource_texture*)texture;
 341         struct pipe_resource resource;
 342         struct r600_transfer *trans;
 343         int r;
 344
 345         trans = CALLOC_STRUCT(r600_transfer);
 346         if (trans == NULL)
 347                 return NULL;
 348         pipe_resource_reference(&trans->transfer.resource, texture);
 349         trans->transfer.sr = sr;
 350         trans->transfer.usage = usage;
 351         trans->transfer.box = *box;
 352         trans->transfer.stride = rtex->pitch_in_bytes[sr.level];
 353         trans->offset = r600_texture_get_offset(rtex, sr.level, box->z, sr.face);
 354         if (rtex->depth) {
 355                 r = r600_texture_depth_flush(ctx, texture);
 356                 if (r < 0) {
 357                         R600_ERR("failed to create temporary texture to hold untiled copy\n");
 358                         pipe_resource_reference(&trans->transfer.resource, NULL);
 359                         FREE(trans);
 360                         return NULL;
 361                 }
 362         } else if (rtex->tiled) {
 363                 resource.target = PIPE_TEXTURE_2D;
 364                 resource.format = texture->format;
 365                 resource.width0 = box->width;
 366                 resource.height0 = box->height;
 367                 resource.depth0 = 1;
 368                 resource.last_level = 0;
 369                 resource.nr_samples = 0;
 370                 resource.usage = PIPE_USAGE_DYNAMIC;
 371                 resource.bind = 0;
 372                 resource.flags = 0;
 373                 /* For texture reading, the temporary (detiled) texture is used as
 374                  * a render target when blitting from a tiled texture. */
 375                 if (usage & PIPE_TRANSFER_READ) {
 376                         resource.bind |= PIPE_BIND_RENDER_TARGET;
 377                 }
 378                 /* For texture writing, the temporary texture is used as a sampler
 379                  * when blitting into a tiled texture. */
 380                 if (usage & PIPE_TRANSFER_WRITE) {
 381                         resource.bind |= PIPE_BIND_SAMPLER_VIEW;
 382                 }
 383                 /* Create the temporary texture. */
 384                 trans->linear_texture = ctx->screen->resource_create(ctx->screen, &resource);
 385                 if (trans->linear_texture == NULL) {
 386                         R600_ERR("failed to create temporary texture to hold untiled copy\n");
 387                         pipe_resource_reference(&trans->transfer.resource, NULL);
 388                         FREE(trans);
 389                         return NULL;
 390                 }
 391
 392                 trans->transfer.stride =
 393                   ((struct r600_resource_texture *)trans->linear_texture)->pitch_in_bytes[0];
 394                 if (usage & PIPE_TRANSFER_READ) {
 395                         /* We cannot map a tiled texture directly because the data is
 396                          * in a different order, therefore we do detiling using a blit. */
 397                         r600_copy_from_tiled_texture(ctx, trans);
 398                         /* Always referenced in the blit. */
 399                         ctx->flush(ctx, 0, NULL);
 400                 }
 401         }
 402         return &trans->transfer;
 403 }
 404
 405 void r600_texture_transfer_destroy(struct pipe_context *ctx,
 406                                    struct pipe_transfer *transfer)
 407 {
 408         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 409         struct r600_resource_texture *rtex = (struct r600_resource_texture*)transfer->resource;
 410
 411         if (rtransfer->linear_texture) {
 412                 if (transfer->usage & PIPE_TRANSFER_WRITE) {
 413                         r600_copy_into_tiled_texture(ctx, rtransfer);
 414                 }
 415                 pipe_resource_reference(&rtransfer->linear_texture, NULL);
 416         }
 417         if (rtex->flushed_depth_texture) {
 418                 pipe_resource_reference((struct pipe_resource **)&rtex->flushed_depth_texture, NULL);
 419         }
 420         pipe_resource_reference(&transfer->resource, NULL);
 421         FREE(transfer);
 422 }
 423
 424 void* r600_texture_transfer_map(struct pipe_context *ctx,
 425                                 struct pipe_transfer* transfer)
 426 {
 427         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 428         struct r600_bo *bo;
 429         enum pipe_format format = transfer->resource->format;
 430         struct radeon *radeon = (struct radeon *)ctx->screen->winsys;
 431         unsigned offset = 0;
 432         char *map;
 433
 434         if (rtransfer->linear_texture) {
 435                 bo = ((struct r600_resource *)rtransfer->linear_texture)->bo;
 436         } else {
 437                 struct r600_resource_texture *rtex = (struct r600_resource_texture*)transfer->resource;
 438
 439                 if (rtex->flushed_depth_texture)
 440                         bo = ((struct r600_resource *)rtex->flushed_depth_texture)->bo;
 441                 else
 442                         bo = ((struct r600_resource *)transfer->resource)->bo;
 443
 444                 offset = rtransfer->offset +
 445                         transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
 446                         transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 447         }
 448         map = r600_bo_map(radeon, bo, 0, ctx);
 449         if (!map) {
 450                 return NULL;
 451         }
 452
 453         return map + offset;
 454 }
 455
 456 void r600_texture_transfer_unmap(struct pipe_context *ctx,
 457                                  struct pipe_transfer* transfer)
 458 {
 459         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 460         struct radeon *radeon = (struct radeon *)ctx->screen->winsys;
 461         struct r600_bo *bo;
 462
 463         if (rtransfer->linear_texture) {
 464                 bo = ((struct r600_resource *)rtransfer->linear_texture)->bo;
 465         } else {
 466                 struct r600_resource_texture *rtex = (struct r600_resource_texture*)transfer->resource;
 467
 468                 if (rtex->flushed_depth_texture) {
 469                         bo = ((struct r600_resource *)rtex->flushed_depth_texture)->bo;
 470                 } else {
 471                         bo = ((struct r600_resource *)transfer->resource)->bo;
 472                 }
 473         }
 474         r600_bo_unmap(radeon, bo);
 475 }
 476
 477 struct u_resource_vtbl r600_texture_vtbl =
 478 {
 479         u_default_resource_get_handle,  /* get_handle */
 480         r600_texture_destroy,           /* resource_destroy */
 481         r600_texture_is_referenced,     /* is_resource_referenced */
 482         r600_texture_get_transfer,      /* get_transfer */
 483         r600_texture_transfer_destroy,  /* transfer_destroy */
 484         r600_texture_transfer_map,      /* transfer_map */
 485         u_default_transfer_flush_region,/* transfer_flush_region */
 486         r600_texture_transfer_unmap,    /* transfer_unmap */
 487         u_default_transfer_inline_write /* transfer_inline_write */
 488 };
 489
 490 void r600_init_screen_texture_functions(struct pipe_screen *screen)
 491 {
 492         screen->get_tex_surface = r600_get_tex_surface;
 493         screen->tex_surface_destroy = r600_tex_surface_destroy;
 494 }
 495
 496 static unsigned r600_get_swizzle_combined(const unsigned char *swizzle_format,
 497                 const unsigned char *swizzle_view)
 498 {
 499         unsigned i;
 500         unsigned char swizzle[4];
 501         unsigned result = 0;
 502         const uint32_t swizzle_shift[4] = {
 503                 16, 19, 22, 25,
 504         };
 505         const uint32_t swizzle_bit[4] = {
 506                 0, 1, 2, 3,
 507         };
 508
 509         if (swizzle_view) {
 510                 /* Combine two sets of swizzles. */
 511                 for (i = 0; i < 4; i++) {
 512                         swizzle[i] = swizzle_view[i] <= UTIL_FORMAT_SWIZZLE_W ?
 513                                 swizzle_format[swizzle_view[i]] : swizzle_view[i];
 514                 }
 515         } else {
 516                 memcpy(swizzle, swizzle_format, 4);
 517         }
 518
 519         /* Get swizzle. */
 520         for (i = 0; i < 4; i++) {
 521                 switch (swizzle[i]) {
 522                 case UTIL_FORMAT_SWIZZLE_Y:
 523                         result |= swizzle_bit[1] << swizzle_shift[i];
 524                         break;
 525                 case UTIL_FORMAT_SWIZZLE_Z:
 526                         result |= swizzle_bit[2] << swizzle_shift[i];
 527                         break;
 528                 case UTIL_FORMAT_SWIZZLE_W:
 529                         result |= swizzle_bit[3] << swizzle_shift[i];
 530                         break;
 531                 case UTIL_FORMAT_SWIZZLE_0:
 532                         result |= V_038010_SQ_SEL_0 << swizzle_shift[i];
 533                         break;
 534                 case UTIL_FORMAT_SWIZZLE_1:
 535                         result |= V_038010_SQ_SEL_1 << swizzle_shift[i];
 536                         break;
 537                 default: /* UTIL_FORMAT_SWIZZLE_X */
 538                         result |= swizzle_bit[0] << swizzle_shift[i];
 539                 }
 540         }
 541         return result;
 542 }
 543
 544 /* texture format translate */
 545 uint32_t r600_translate_texformat(enum pipe_format format,
 546                                   const unsigned char *swizzle_view,
 547                                   uint32_t *word4_p, uint32_t *yuv_format_p)
 548 {
 549         uint32_t result = 0, word4 = 0, yuv_format = 0;
 550         const struct util_format_description *desc;
 551         boolean uniform = TRUE;
 552         int i;
 553         const uint32_t sign_bit[4] = {
 554                 S_038010_FORMAT_COMP_X(V_038010_SQ_FORMAT_COMP_SIGNED),
 555                 S_038010_FORMAT_COMP_Y(V_038010_SQ_FORMAT_COMP_SIGNED),
 556                 S_038010_FORMAT_COMP_Z(V_038010_SQ_FORMAT_COMP_SIGNED),
 557                 S_038010_FORMAT_COMP_W(V_038010_SQ_FORMAT_COMP_SIGNED)
 558         };
 559         desc = util_format_description(format);
 560
 561         word4 |= r600_get_swizzle_combined(desc->swizzle, swizzle_view);
 562
 563         /* Colorspace (return non-RGB formats directly). */
 564         switch (desc->colorspace) {
 565                 /* Depth stencil formats */
 566         case UTIL_FORMAT_COLORSPACE_ZS:
 567                 switch (format) {
 568                 case PIPE_FORMAT_Z16_UNORM:
 569                         result = FMT_16;
 570                         goto out_word4;
 571                 case PIPE_FORMAT_X24S8_USCALED:
 572                         word4 |= S_038010_NUM_FORMAT_ALL(V_038010_SQ_NUM_FORMAT_INT);
 573                 case PIPE_FORMAT_Z24X8_UNORM:
 574                 case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
 575                         result = FMT_8_24;
 576                         goto out_word4;
 577                 case PIPE_FORMAT_S8X24_USCALED:
 578                         word4 |= S_038010_NUM_FORMAT_ALL(V_038010_SQ_NUM_FORMAT_INT);
 579                 case PIPE_FORMAT_X8Z24_UNORM:
 580                 case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
 581                         result = FMT_24_8;
 582                         goto out_word4;
 583                 case PIPE_FORMAT_S8_USCALED:
 584                         result = V_0280A0_COLOR_8;
 585                         word4 |= S_038010_NUM_FORMAT_ALL(V_038010_SQ_NUM_FORMAT_INT);
 586                         goto out_word4;
 587                 default:
 588                         goto out_unknown;
 589                 }
 590
 591         case UTIL_FORMAT_COLORSPACE_YUV:
 592                 yuv_format |= (1 << 30);
 593                 switch (format) {
 594                 case PIPE_FORMAT_UYVY:
 595                 case PIPE_FORMAT_YUYV:
 596                 default:
 597                         break;
 598                 }
 599                 goto out_unknown; /* TODO */
 600
 601         case UTIL_FORMAT_COLORSPACE_SRGB:
 602                 word4 |= S_038010_FORCE_DEGAMMA(1);
 603                 if (format == PIPE_FORMAT_L8A8_SRGB || format == PIPE_FORMAT_L8_SRGB)
 604                         goto out_unknown; /* fails for some reason - TODO */
 605                 break;
 606
 607         default:
 608                 break;
 609         }
 610
 611         /* S3TC formats. TODO */
 612         if (desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 613                 goto out_unknown;
 614         }
 615
 616
 617         for (i = 0; i < desc->nr_channels; i++) {
 618                 if (desc->channel[i].type == UTIL_FORMAT_TYPE_SIGNED) {
 619                         word4 |= sign_bit[i];
 620                 }
 621         }
 622
 623         /* R8G8Bx_SNORM - TODO CxV8U8 */
 624
 625         /* RGTC - TODO */
 626
 627         /* See whether the components are of the same size. */
 628         for (i = 1; i < desc->nr_channels; i++) {
 629                 uniform = uniform && desc->channel[0].size == desc->channel[i].size;
 630         }
 631
 632         /* Non-uniform formats. */
 633         if (!uniform) {
 634                 switch(desc->nr_channels) {
 635                 case 3:
 636                         if (desc->channel[0].size == 5 &&
 637                             desc->channel[1].size == 6 &&
 638                             desc->channel[2].size == 5) {
 639                                 result = FMT_5_6_5;
 640                                 goto out_word4;
 641                         }
 642                         goto out_unknown;
 643                 case 4:
 644                         if (desc->channel[0].size == 5 &&
 645                             desc->channel[1].size == 5 &&
 646                             desc->channel[2].size == 5 &&
 647                             desc->channel[3].size == 1) {
 648                                 result = FMT_1_5_5_5;
 649                                 goto out_word4;
 650                         }
 651                         if (desc->channel[0].size == 10 &&
 652                             desc->channel[1].size == 10 &&
 653                             desc->channel[2].size == 10 &&
 654                             desc->channel[3].size == 2) {
 655                                 result = FMT_10_10_10_2;
 656                                 goto out_word4;
 657                         }
 658                         goto out_unknown;
 659                 }
 660                 goto out_unknown;
 661         }
 662
 663         /* Find the first non-VOID channel. */
 664         for (i = 0; i < 4; i++) {
 665                 if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 666                         break;
 667                 }
 668         }
 669
 670         if (i == 4)
 671                 goto out_unknown;
 672
 673         /* uniform formats */
 674         switch (desc->channel[i].type) {
 675         case UTIL_FORMAT_TYPE_UNSIGNED:
 676         case UTIL_FORMAT_TYPE_SIGNED:
 677                 if (!desc->channel[i].normalized &&
 678                     desc->colorspace != UTIL_FORMAT_COLORSPACE_SRGB) {
 679                         goto out_unknown;
 680                 }
 681
 682                 switch (desc->channel[i].size) {
 683                 case 4:
 684                         switch (desc->nr_channels) {
 685                         case 2:
 686                                 result = FMT_4_4;
 687                                 goto out_word4;
 688                         case 4:
 689                                 result = FMT_4_4_4_4;
 690                                 goto out_word4;
 691                         }
 692                         goto out_unknown;
 693                 case 8:
 694                         switch (desc->nr_channels) {
 695                         case 1:
 696                                 result = FMT_8;
 697                                 goto out_word4;
 698                         case 2:
 699                                 result = FMT_8_8;
 700                                 goto out_word4;
 701                         case 4:
 702                                 result = FMT_8_8_8_8;
 703                                 goto out_word4;
 704                         }
 705                         goto out_unknown;
 706                 case 16:
 707                         switch (desc->nr_channels) {
 708                         case 1:
 709                                 result = FMT_16;
 710                                 goto out_word4;
 711                         case 2:
 712                                 result = FMT_16_16;
 713                                 goto out_word4;
 714                         case 4:
 715                                 result = FMT_16_16_16_16;
 716                                 goto out_word4;
 717                         }
 718                 }
 719                 goto out_unknown;
 720
 721         case UTIL_FORMAT_TYPE_FLOAT:
 722                 switch (desc->channel[i].size) {
 723                 case 16:
 724                         switch (desc->nr_channels) {
 725                         case 1:
 726                                 result = FMT_16_FLOAT;
 727                                 goto out_word4;
 728                         case 2:
 729                                 result = FMT_16_16_FLOAT;
 730                                 goto out_word4;
 731                         case 4:
 732                                 result = FMT_16_16_16_16_FLOAT;
 733                                 goto out_word4;
 734                         }
 735                         goto out_unknown;
 736                 case 32:
 737                         switch (desc->nr_channels) {
 738                         case 1:
 739                                 result = FMT_32_FLOAT;
 740                                 goto out_word4;
 741                         case 2:
 742                                 result = FMT_32_32_FLOAT;
 743                                 goto out_word4;
 744                         case 4:
 745                                 result = FMT_32_32_32_32_FLOAT;
 746                                 goto out_word4;
 747                         }
 748                 }
 749
 750         }
 751 out_word4:
 752         if (word4_p)
 753                 *word4_p = word4;
 754         if (yuv_format_p)
 755                 *yuv_format_p = yuv_format;
 756         return result;
 757 out_unknown:
 758 //      R600_ERR("Unable to handle texformat %d %s\n", format, util_format_name(format));
 759         return ~0;
 760 }