src/gallium/drivers/r600/r600_state_inlines.h

   1 /*
   2  * Copyright 2010 Red Hat Inc.
   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 #ifndef R600_STATE_INLINES_H
  24 #define R600_STATE_INLINES_H
  25
  26 #include "util/u_format.h"
  27 #include "r600d.h"
  28 #include "r600_formats.h"
  29
  30 static INLINE uint32_t r600_translate_blend_function(int blend_func)
  31 {
  32         switch (blend_func) {
  33         case PIPE_BLEND_ADD:
  34                 return V_028804_COMB_DST_PLUS_SRC;
  35         case PIPE_BLEND_SUBTRACT:
  36                 return V_028804_COMB_SRC_MINUS_DST;
  37         case PIPE_BLEND_REVERSE_SUBTRACT:
  38                 return V_028804_COMB_DST_MINUS_SRC;
  39         case PIPE_BLEND_MIN:
  40                 return V_028804_COMB_MIN_DST_SRC;
  41         case PIPE_BLEND_MAX:
  42                 return V_028804_COMB_MAX_DST_SRC;
  43         default:
  44                 R600_ERR("Unknown blend function %d\n", blend_func);
  45                 assert(0);
  46                 break;
  47         }
  48         return 0;
  49 }
  50
  51 static INLINE uint32_t r600_translate_blend_factor(int blend_fact)
  52 {
  53         switch (blend_fact) {
  54         case PIPE_BLENDFACTOR_ONE:
  55                 return V_028804_BLEND_ONE;
  56         case PIPE_BLENDFACTOR_SRC_COLOR:
  57                 return V_028804_BLEND_SRC_COLOR;
  58         case PIPE_BLENDFACTOR_SRC_ALPHA:
  59                 return V_028804_BLEND_SRC_ALPHA;
  60         case PIPE_BLENDFACTOR_DST_ALPHA:
  61                 return V_028804_BLEND_DST_ALPHA;
  62         case PIPE_BLENDFACTOR_DST_COLOR:
  63                 return V_028804_BLEND_DST_COLOR;
  64         case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE:
  65                 return V_028804_BLEND_SRC_ALPHA_SATURATE;
  66         case PIPE_BLENDFACTOR_CONST_COLOR:
  67                 return V_028804_BLEND_CONST_COLOR;
  68         case PIPE_BLENDFACTOR_CONST_ALPHA:
  69                 return V_028804_BLEND_CONST_ALPHA;
  70         case PIPE_BLENDFACTOR_ZERO:
  71                 return V_028804_BLEND_ZERO;
  72         case PIPE_BLENDFACTOR_INV_SRC_COLOR:
  73                 return V_028804_BLEND_ONE_MINUS_SRC_COLOR;
  74         case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
  75                 return V_028804_BLEND_ONE_MINUS_SRC_ALPHA;
  76         case PIPE_BLENDFACTOR_INV_DST_ALPHA:
  77                 return V_028804_BLEND_ONE_MINUS_DST_ALPHA;
  78         case PIPE_BLENDFACTOR_INV_DST_COLOR:
  79                 return V_028804_BLEND_ONE_MINUS_DST_COLOR;
  80         case PIPE_BLENDFACTOR_INV_CONST_COLOR:
  81                 return V_028804_BLEND_ONE_MINUS_CONST_COLOR;
  82         case PIPE_BLENDFACTOR_INV_CONST_ALPHA:
  83                 return V_028804_BLEND_ONE_MINUS_CONST_ALPHA;
  84         case PIPE_BLENDFACTOR_SRC1_COLOR:
  85                 return V_028804_BLEND_SRC1_COLOR;
  86         case PIPE_BLENDFACTOR_SRC1_ALPHA:
  87                 return V_028804_BLEND_SRC1_ALPHA;
  88         case PIPE_BLENDFACTOR_INV_SRC1_COLOR:
  89                 return V_028804_BLEND_INV_SRC1_COLOR;
  90         case PIPE_BLENDFACTOR_INV_SRC1_ALPHA:
  91                 return V_028804_BLEND_INV_SRC1_ALPHA;
  92         default:
  93                 R600_ERR("Bad blend factor %d not supported!\n", blend_fact);
  94                 assert(0);
  95                 break;
  96         }
  97         return 0;
  98 }
  99
 100 static INLINE uint32_t r600_translate_stencil_op(int s_op)
 101 {
 102         switch (s_op) {
 103         case PIPE_STENCIL_OP_KEEP:
 104                 return V_028800_STENCIL_KEEP;
 105         case PIPE_STENCIL_OP_ZERO:
 106                 return V_028800_STENCIL_ZERO;
 107         case PIPE_STENCIL_OP_REPLACE:
 108                 return V_028800_STENCIL_REPLACE;
 109         case PIPE_STENCIL_OP_INCR:
 110                 return V_028800_STENCIL_INCR;
 111         case PIPE_STENCIL_OP_DECR:
 112                 return V_028800_STENCIL_DECR;
 113         case PIPE_STENCIL_OP_INCR_WRAP:
 114                 return V_028800_STENCIL_INCR_WRAP;
 115         case PIPE_STENCIL_OP_DECR_WRAP:
 116                 return V_028800_STENCIL_DECR_WRAP;
 117         case PIPE_STENCIL_OP_INVERT:
 118                 return V_028800_STENCIL_INVERT;
 119         default:
 120                 R600_ERR("Unknown stencil op %d", s_op);
 121                 assert(0);
 122                 break;
 123         }
 124         return 0;
 125 }
 126
 127 static INLINE uint32_t r600_translate_fill(uint32_t func)
 128 {
 129         switch(func) {
 130         case PIPE_POLYGON_MODE_FILL:
 131                 return 2;
 132         case PIPE_POLYGON_MODE_LINE:
 133                 return 1;
 134         case PIPE_POLYGON_MODE_POINT:
 135                 return 0;
 136         default:
 137                 assert(0);
 138                 return 0;
 139         }
 140 }
 141
 142 /* translates straight */
 143 static INLINE uint32_t r600_translate_ds_func(int func)
 144 {
 145         return func;
 146 }
 147
 148 static inline unsigned r600_tex_wrap(unsigned wrap)
 149 {
 150         switch (wrap) {
 151         default:
 152         case PIPE_TEX_WRAP_REPEAT:
 153                 return V_03C000_SQ_TEX_WRAP;
 154         case PIPE_TEX_WRAP_CLAMP:
 155                 return V_03C000_SQ_TEX_CLAMP_HALF_BORDER;
 156         case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
 157                 return V_03C000_SQ_TEX_CLAMP_LAST_TEXEL;
 158         case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
 159                 return V_03C000_SQ_TEX_CLAMP_BORDER;
 160         case PIPE_TEX_WRAP_MIRROR_REPEAT:
 161                 return V_03C000_SQ_TEX_MIRROR;
 162         case PIPE_TEX_WRAP_MIRROR_CLAMP:
 163                 return V_03C000_SQ_TEX_MIRROR_ONCE_HALF_BORDER;
 164         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
 165                 return V_03C000_SQ_TEX_MIRROR_ONCE_LAST_TEXEL;
 166         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
 167                 return V_03C000_SQ_TEX_MIRROR_ONCE_BORDER;
 168         }
 169 }
 170
 171 static inline unsigned r600_tex_filter(unsigned filter)
 172 {
 173         switch (filter) {
 174         default:
 175         case PIPE_TEX_FILTER_NEAREST:
 176                 return V_03C000_SQ_TEX_XY_FILTER_POINT;
 177         case PIPE_TEX_FILTER_LINEAR:
 178                 return V_03C000_SQ_TEX_XY_FILTER_BILINEAR;
 179         }
 180 }
 181
 182 static inline unsigned r600_tex_mipfilter(unsigned filter)
 183 {
 184         switch (filter) {
 185         case PIPE_TEX_MIPFILTER_NEAREST:
 186                 return V_03C000_SQ_TEX_Z_FILTER_POINT;
 187         case PIPE_TEX_MIPFILTER_LINEAR:
 188                 return V_03C000_SQ_TEX_Z_FILTER_LINEAR;
 189         default:
 190         case PIPE_TEX_MIPFILTER_NONE:
 191                 return V_03C000_SQ_TEX_Z_FILTER_NONE;
 192         }
 193 }
 194
 195 static inline unsigned r600_tex_compare(unsigned compare)
 196 {
 197         switch (compare) {
 198         default:
 199         case PIPE_FUNC_NEVER:
 200                 return V_03C000_SQ_TEX_DEPTH_COMPARE_NEVER;
 201         case PIPE_FUNC_LESS:
 202                 return V_03C000_SQ_TEX_DEPTH_COMPARE_LESS;
 203         case PIPE_FUNC_EQUAL:
 204                 return V_03C000_SQ_TEX_DEPTH_COMPARE_EQUAL;
 205         case PIPE_FUNC_LEQUAL:
 206                 return V_03C000_SQ_TEX_DEPTH_COMPARE_LESSEQUAL;
 207         case PIPE_FUNC_GREATER:
 208                 return V_03C000_SQ_TEX_DEPTH_COMPARE_GREATER;
 209         case PIPE_FUNC_NOTEQUAL:
 210                 return V_03C000_SQ_TEX_DEPTH_COMPARE_NOTEQUAL;
 211         case PIPE_FUNC_GEQUAL:
 212                 return V_03C000_SQ_TEX_DEPTH_COMPARE_GREATEREQUAL;
 213         case PIPE_FUNC_ALWAYS:
 214                 return V_03C000_SQ_TEX_DEPTH_COMPARE_ALWAYS;
 215         }
 216 }
 217
 218 static inline unsigned r600_tex_swizzle(unsigned swizzle)
 219 {
 220         switch (swizzle) {
 221         case PIPE_SWIZZLE_RED:
 222                 return V_038010_SQ_SEL_X;
 223         case PIPE_SWIZZLE_GREEN:
 224                 return V_038010_SQ_SEL_Y;
 225         case PIPE_SWIZZLE_BLUE:
 226                 return V_038010_SQ_SEL_Z;
 227         case PIPE_SWIZZLE_ALPHA:
 228                 return V_038010_SQ_SEL_W;
 229         case PIPE_SWIZZLE_ZERO:
 230                 return V_038010_SQ_SEL_0;
 231         default:
 232         case PIPE_SWIZZLE_ONE:
 233                 return V_038010_SQ_SEL_1;
 234         }
 235 }
 236
 237 static inline unsigned r600_format_type(unsigned format_type)
 238 {
 239         switch (format_type) {
 240         default:
 241         case UTIL_FORMAT_TYPE_UNSIGNED:
 242                 return V_038010_SQ_FORMAT_COMP_UNSIGNED;
 243         case UTIL_FORMAT_TYPE_SIGNED:
 244                 return V_038010_SQ_FORMAT_COMP_SIGNED;
 245         case UTIL_FORMAT_TYPE_FIXED:
 246                 return V_038010_SQ_FORMAT_COMP_UNSIGNED_BIASED;
 247         }
 248 }
 249
 250 static inline unsigned r600_tex_dim(unsigned dim)
 251 {
 252         switch (dim) {
 253         default:
 254         case PIPE_TEXTURE_1D:
 255                 return V_038000_SQ_TEX_DIM_1D;
 256         case PIPE_TEXTURE_2D:
 257         case PIPE_TEXTURE_RECT:
 258                 return V_038000_SQ_TEX_DIM_2D;
 259         case PIPE_TEXTURE_3D:
 260                 return V_038000_SQ_TEX_DIM_3D;
 261         case PIPE_TEXTURE_CUBE:
 262                 return V_038000_SQ_TEX_DIM_CUBEMAP;
 263         }
 264 }
 265
 266 static inline uint32_t r600_translate_dbformat(enum pipe_format format)
 267 {
 268         switch (format) {
 269         case PIPE_FORMAT_Z16_UNORM:
 270                 return V_028010_DEPTH_16;
 271         case PIPE_FORMAT_Z24X8_UNORM:
 272                 return V_028010_DEPTH_X8_24;
 273         case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
 274                 return V_028010_DEPTH_8_24;
 275         default:
 276                 return ~0;
 277         }
 278 }
 279
 280 static inline uint32_t r600_translate_colorswap(enum pipe_format format)
 281 {
 282         switch (format) {
 283                 /* 8-bit buffers. */
 284         case PIPE_FORMAT_A8_UNORM:
 285                 return V_0280A0_SWAP_ALT_REV;
 286         case PIPE_FORMAT_I8_UNORM:
 287         case PIPE_FORMAT_L8_UNORM:
 288         case PIPE_FORMAT_R8_UNORM:
 289         case PIPE_FORMAT_R8_SNORM:
 290                 return V_0280A0_SWAP_STD;
 291
 292                 /* 16-bit buffers. */
 293         case PIPE_FORMAT_B5G6R5_UNORM:
 294                 return V_0280A0_SWAP_STD_REV;
 295
 296         case PIPE_FORMAT_B5G5R5A1_UNORM:
 297         case PIPE_FORMAT_B5G5R5X1_UNORM:
 298                 return V_0280A0_SWAP_ALT;
 299
 300         case PIPE_FORMAT_B4G4R4A4_UNORM:
 301         case PIPE_FORMAT_B4G4R4X4_UNORM:
 302                 return V_0280A0_SWAP_ALT;
 303
 304         case PIPE_FORMAT_Z16_UNORM:
 305                 return V_0280A0_SWAP_STD;
 306
 307         case PIPE_FORMAT_L8A8_UNORM:
 308                 return V_0280A0_SWAP_ALT;
 309         case PIPE_FORMAT_R8G8_UNORM:
 310                 return V_0280A0_SWAP_STD;
 311
 312         case PIPE_FORMAT_R16_UNORM:
 313                 return V_0280A0_SWAP_STD;
 314
 315                 /* 32-bit buffers. */
 316
 317         case PIPE_FORMAT_A8B8G8R8_SRGB:
 318                 return V_0280A0_SWAP_STD_REV;
 319         case PIPE_FORMAT_B8G8R8A8_SRGB:
 320                 return V_0280A0_SWAP_ALT;
 321
 322         case PIPE_FORMAT_B8G8R8A8_UNORM:
 323         case PIPE_FORMAT_B8G8R8X8_UNORM:
 324                 return V_0280A0_SWAP_ALT;
 325
 326         case PIPE_FORMAT_A8R8G8B8_UNORM:
 327         case PIPE_FORMAT_X8R8G8B8_UNORM:
 328                 return V_0280A0_SWAP_ALT_REV;
 329         case PIPE_FORMAT_R8G8B8A8_SNORM:
 330         case PIPE_FORMAT_R8G8B8X8_UNORM:
 331                 return V_0280A0_SWAP_STD;
 332
 333         case PIPE_FORMAT_A8B8G8R8_UNORM:
 334         case PIPE_FORMAT_X8B8G8R8_UNORM:
 335                 //        case PIPE_FORMAT_R8SG8SB8UX8U_NORM:
 336                 return V_0280A0_SWAP_STD_REV;
 337
 338         case PIPE_FORMAT_Z24X8_UNORM:
 339         case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
 340                 return V_0280A0_SWAP_STD;
 341
 342         case PIPE_FORMAT_X8Z24_UNORM:
 343         case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
 344                 return V_0280A0_SWAP_STD;
 345
 346         case PIPE_FORMAT_R10G10B10A2_UNORM:
 347         case PIPE_FORMAT_R10G10B10X2_SNORM:
 348         case PIPE_FORMAT_B10G10R10A2_UNORM:
 349         case PIPE_FORMAT_R10SG10SB10SA2U_NORM:
 350                 return V_0280A0_SWAP_STD_REV;
 351
 352         case PIPE_FORMAT_R16G16_UNORM:
 353                 return V_0280A0_SWAP_STD;
 354
 355                 /* 64-bit buffers. */
 356         case PIPE_FORMAT_R16G16B16A16_UNORM:
 357         case PIPE_FORMAT_R16G16B16A16_SNORM:
 358         case PIPE_FORMAT_R16G16B16A16_FLOAT:
 359
 360                 /* 128-bit buffers. */
 361         case PIPE_FORMAT_R32G32B32A32_FLOAT:
 362         case PIPE_FORMAT_R32G32B32A32_SNORM:
 363         case PIPE_FORMAT_R32G32B32A32_UNORM:
 364                 return V_0280A0_SWAP_STD;
 365         default:
 366                 R600_ERR("unsupported colorswap format %d\n", format);
 367                 return ~0;
 368         }
 369         return ~0;
 370 }
 371
 372 static INLINE uint32_t r600_translate_colorformat(enum pipe_format format)
 373 {
 374         switch (format) {
 375                 /* 8-bit buffers. */
 376         case PIPE_FORMAT_A8_UNORM:
 377         case PIPE_FORMAT_I8_UNORM:
 378         case PIPE_FORMAT_L8_UNORM:
 379         case PIPE_FORMAT_R8_UNORM:
 380         case PIPE_FORMAT_R8_SNORM:
 381                 return V_0280A0_COLOR_8;
 382
 383                 /* 16-bit buffers. */
 384         case PIPE_FORMAT_B5G6R5_UNORM:
 385                 return V_0280A0_COLOR_5_6_5;
 386
 387         case PIPE_FORMAT_B5G5R5A1_UNORM:
 388         case PIPE_FORMAT_B5G5R5X1_UNORM:
 389                 return V_0280A0_COLOR_1_5_5_5;
 390
 391         case PIPE_FORMAT_B4G4R4A4_UNORM:
 392         case PIPE_FORMAT_B4G4R4X4_UNORM:
 393                 return V_0280A0_COLOR_4_4_4_4;
 394
 395         case PIPE_FORMAT_Z16_UNORM:
 396                 return V_0280A0_COLOR_16;
 397
 398         case PIPE_FORMAT_L8A8_UNORM:
 399         case PIPE_FORMAT_R8G8_UNORM:
 400                 return V_0280A0_COLOR_8_8;
 401
 402         case PIPE_FORMAT_R16_UNORM:
 403                 return V_0280A0_COLOR_16;
 404
 405                 /* 32-bit buffers. */
 406         case PIPE_FORMAT_A8B8G8R8_SRGB:
 407         case PIPE_FORMAT_A8B8G8R8_UNORM:
 408         case PIPE_FORMAT_A8R8G8B8_UNORM:
 409         case PIPE_FORMAT_B8G8R8A8_SRGB:
 410         case PIPE_FORMAT_B8G8R8A8_UNORM:
 411         case PIPE_FORMAT_B8G8R8X8_UNORM:
 412         case PIPE_FORMAT_R8G8B8A8_SNORM:
 413         case PIPE_FORMAT_R8G8B8A8_UNORM:
 414         case PIPE_FORMAT_R8G8B8X8_UNORM:
 415         case PIPE_FORMAT_R8SG8SB8UX8U_NORM:
 416         case PIPE_FORMAT_X8B8G8R8_UNORM:
 417         case PIPE_FORMAT_X8R8G8B8_UNORM:
 418         case PIPE_FORMAT_R8G8B8_UNORM:
 419                 return V_0280A0_COLOR_8_8_8_8;
 420
 421         case PIPE_FORMAT_R10G10B10A2_UNORM:
 422         case PIPE_FORMAT_R10G10B10X2_SNORM:
 423         case PIPE_FORMAT_B10G10R10A2_UNORM:
 424         case PIPE_FORMAT_R10SG10SB10SA2U_NORM:
 425                 return V_0280A0_COLOR_10_10_10_2;
 426
 427         case PIPE_FORMAT_Z24X8_UNORM:
 428         case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
 429                 return V_0280A0_COLOR_8_24;
 430
 431         case PIPE_FORMAT_X8Z24_UNORM:
 432         case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
 433                 return V_0280A0_COLOR_24_8;
 434
 435         case PIPE_FORMAT_R32_FLOAT:
 436                 return V_0280A0_COLOR_32_FLOAT;
 437
 438         case PIPE_FORMAT_R16G16_FLOAT:
 439                 return V_0280A0_COLOR_16_16_FLOAT;
 440
 441         case PIPE_FORMAT_R16G16_SSCALED:
 442         case PIPE_FORMAT_R16G16_UNORM:
 443                 return V_0280A0_COLOR_16_16;
 444
 445
 446                 /* 64-bit buffers. */
 447         case PIPE_FORMAT_R16G16B16_USCALED:
 448         case PIPE_FORMAT_R16G16B16A16_USCALED:
 449         case PIPE_FORMAT_R16G16B16_SSCALED:
 450         case PIPE_FORMAT_R16G16B16A16_SSCALED:
 451         case PIPE_FORMAT_R16G16B16A16_UNORM:
 452         case PIPE_FORMAT_R16G16B16A16_SNORM:
 453                 return V_0280A0_COLOR_16_16_16_16;
 454
 455         case PIPE_FORMAT_R16G16B16_FLOAT:
 456         case PIPE_FORMAT_R16G16B16A16_FLOAT:
 457                 return V_0280A0_COLOR_16_16_16_16_FLOAT;
 458
 459         case PIPE_FORMAT_R32G32_FLOAT:
 460                 return V_0280A0_COLOR_32_32_FLOAT;
 461
 462         case PIPE_FORMAT_R32G32_USCALED:
 463         case PIPE_FORMAT_R32G32_SSCALED:
 464                 return V_0280A0_COLOR_32_32;
 465
 466                 /* 128-bit buffers. */
 467         case PIPE_FORMAT_R32G32B32_FLOAT:
 468                 return V_0280A0_COLOR_32_32_32_FLOAT;
 469         case PIPE_FORMAT_R32G32B32A32_FLOAT:
 470                 return V_0280A0_COLOR_32_32_32_32_FLOAT;
 471         case PIPE_FORMAT_R32G32B32A32_SNORM:
 472         case PIPE_FORMAT_R32G32B32A32_UNORM:
 473                 return V_0280A0_COLOR_32_32_32_32;
 474
 475                 /* YUV buffers. */
 476         case PIPE_FORMAT_UYVY:
 477         case PIPE_FORMAT_YUYV:
 478         default:
 479                 //R600_ERR("unsupported color format %d %s\n", format, util_format_name(format));
 480                 return ~0; /* Unsupported. */
 481         }
 482 }
 483
 484 static INLINE boolean r600_is_sampler_format_supported(enum pipe_format format)
 485 {
 486         return r600_translate_texformat(format, NULL, NULL, NULL) != ~0;
 487 }
 488
 489 static INLINE boolean r600_is_colorbuffer_format_supported(enum pipe_format format)
 490 {
 491         return r600_translate_colorformat(format) != ~0 &&
 492                 r600_translate_colorswap(format) != ~0;
 493 }
 494
 495 static INLINE boolean r600_is_zs_format_supported(enum pipe_format format)
 496 {
 497         return r600_translate_dbformat(format) != ~0;
 498 }
 499
 500 static INLINE boolean r600_is_vertex_format_supported(enum pipe_format format,
 501                                                       enum radeon_family family)
 502 {
 503         unsigned i;
 504         const struct util_format_description *desc = util_format_description(format);
 505         if (!desc)
 506                 return FALSE;
 507
 508         /* Find the first non-VOID channel. */
 509         for (i = 0; i < 4; i++) {
 510                 if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
 511                         break;
 512                 }
 513         }
 514         if (i == 4)
 515                 return FALSE;
 516
 517         /* No fixed, no double. */
 518         if (desc->layout != UTIL_FORMAT_LAYOUT_PLAIN ||
 519             desc->channel[i].type == UTIL_FORMAT_TYPE_FIXED ||
 520             (desc->channel[i].size == 64 &&
 521              desc->channel[i].type == UTIL_FORMAT_TYPE_FLOAT))
 522                 return FALSE;
 523
 524         /* No scaled/norm formats with 32 bits per channel. */
 525         if (desc->channel[i].size == 32 &&
 526             (desc->channel[i].type == UTIL_FORMAT_TYPE_SIGNED ||
 527              desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED))
 528                 return FALSE;
 529
 530         return TRUE;
 531 }
 532
 533 #endif