src/freedreno/vulkan/vk_format.h

   1 /*
   2  * Copyright © 2016 Red Hat.
   3  * Copyright © 2016 Bas Nieuwenhuizen
   4  *
   5  * Based on u_format.h which is:
   6  * Copyright 2009-2010 Vmware, Inc.
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 #ifndef VK_FORMAT_H
  28 #define VK_FORMAT_H
  29
  30 #include <assert.h>
  31 #include <util/macros.h>
  32
  33 #include <vulkan/vulkan.h>
  34
  35 enum vk_format_layout
  36 {
  37    /**
  38     * Formats with vk_format_block::width == vk_format_block::height == 1
  39     * that can be described as an ordinary data structure.
  40     */
  41    VK_FORMAT_LAYOUT_PLAIN = 0,
  42
  43    /**
  44     * Formats with sub-sampled channels.
  45     *
  46     * This is for formats like YVYU where there is less than one sample per
  47     * pixel.
  48     */
  49    VK_FORMAT_LAYOUT_SUBSAMPLED = 3,
  50
  51    /**
  52     * S3 Texture Compression formats.
  53     */
  54    VK_FORMAT_LAYOUT_S3TC = 4,
  55
  56    /**
  57     * Red-Green Texture Compression formats.
  58     */
  59    VK_FORMAT_LAYOUT_RGTC = 5,
  60
  61    /**
  62     * Ericsson Texture Compression
  63     */
  64    VK_FORMAT_LAYOUT_ETC = 6,
  65
  66    /**
  67     * BC6/7 Texture Compression
  68     */
  69    VK_FORMAT_LAYOUT_BPTC = 7,
  70
  71    /**
  72     * ASTC
  73     */
  74    VK_FORMAT_LAYOUT_ASTC = 8,
  75
  76    /**
  77     * Everything else that doesn't fit in any of the above layouts.
  78     */
  79    VK_FORMAT_LAYOUT_OTHER = 9
  80 };
  81
  82 struct vk_format_block
  83 {
  84    /** Block width in pixels */
  85    unsigned width;
  86
  87    /** Block height in pixels */
  88    unsigned height;
  89
  90    /** Block size in bits */
  91    unsigned bits;
  92 };
  93
  94 enum vk_format_type
  95 {
  96    VK_FORMAT_TYPE_VOID = 0,
  97    VK_FORMAT_TYPE_UNSIGNED = 1,
  98    VK_FORMAT_TYPE_SIGNED = 2,
  99    VK_FORMAT_TYPE_FIXED = 3,
 100    VK_FORMAT_TYPE_FLOAT = 4
 101 };
 102
 103 enum vk_format_colorspace
 104 {
 105    VK_FORMAT_COLORSPACE_RGB = 0,
 106    VK_FORMAT_COLORSPACE_SRGB = 1,
 107    VK_FORMAT_COLORSPACE_YUV = 2,
 108    VK_FORMAT_COLORSPACE_ZS = 3
 109 };
 110
 111 struct vk_format_channel_description
 112 {
 113    unsigned type : 5;
 114    unsigned normalized : 1;
 115    unsigned pure_integer : 1;
 116    unsigned scaled : 1;
 117    unsigned size : 8;
 118    unsigned shift : 16;
 119 };
 120
 121 struct vk_format_description
 122 {
 123    VkFormat format;
 124    const char *name;
 125    const char *short_name;
 126
 127    struct vk_format_block block;
 128    enum vk_format_layout layout;
 129
 130    unsigned nr_channels : 3;
 131    unsigned is_array : 1;
 132    unsigned is_bitmask : 1;
 133    unsigned is_mixed : 1;
 134
 135    struct vk_format_channel_description channel[4];
 136
 137    unsigned char swizzle[4];
 138
 139    enum vk_format_colorspace colorspace;
 140 };
 141
 142 extern const struct vk_format_description vk_format_description_table[];
 143
 144 const struct vk_format_description *
 145 vk_format_description(VkFormat format);
 146
 147 /**
 148  * Return total bits needed for the pixel format per block.
 149  */
 150 static inline unsigned
 151 vk_format_get_blocksizebits(VkFormat format)
 152 {
 153    const struct vk_format_description *desc = vk_format_description(format);
 154
 155    assert(desc);
 156    if (!desc) {
 157       return 0;
 158    }
 159
 160    return desc->block.bits;
 161 }
 162
 163 /**
 164  * Return bytes per block (not pixel) for the given format.
 165  */
 166 static inline unsigned
 167 vk_format_get_blocksize(VkFormat format)
 168 {
 169    unsigned bits = vk_format_get_blocksizebits(format);
 170    unsigned bytes = bits / 8;
 171
 172    assert(bits % 8 == 0);
 173    assert(bytes > 0);
 174    if (bytes == 0) {
 175       bytes = 1;
 176    }
 177
 178    return bytes;
 179 }
 180
 181 static inline unsigned
 182 vk_format_get_blockwidth(VkFormat format)
 183 {
 184    const struct vk_format_description *desc = vk_format_description(format);
 185
 186    assert(desc);
 187    if (!desc) {
 188       return 1;
 189    }
 190
 191    return desc->block.width;
 192 }
 193
 194 static inline unsigned
 195 vk_format_get_blockheight(VkFormat format)
 196 {
 197    const struct vk_format_description *desc = vk_format_description(format);
 198
 199    assert(desc);
 200    if (!desc) {
 201       return 1;
 202    }
 203
 204    return desc->block.height;
 205 }
 206
 207 static inline unsigned
 208 vk_format_get_block_count_width(VkFormat format, unsigned width)
 209 {
 210    unsigned blockwidth = vk_format_get_blockwidth(format);
 211    return (width + blockwidth - 1) / blockwidth;
 212 }
 213
 214 static inline unsigned
 215 vk_format_get_block_count_height(VkFormat format, unsigned height)
 216 {
 217    unsigned blockheight = vk_format_get_blockheight(format);
 218    return (height + blockheight - 1) / blockheight;
 219 }
 220
 221 static inline unsigned
 222 vk_format_get_block_count(VkFormat format, unsigned width, unsigned height)
 223 {
 224    return vk_format_get_block_count_width(format, width) *
 225           vk_format_get_block_count_height(format, height);
 226 }
 227
 228 /**
 229  * Return the index of the first non-void channel
 230  * -1 if no non-void channels
 231  */
 232 static inline int
 233 vk_format_get_first_non_void_channel(VkFormat format)
 234 {
 235    const struct vk_format_description *desc = vk_format_description(format);
 236    int i;
 237
 238    for (i = 0; i < 4; i++)
 239       if (desc->channel[i].type != VK_FORMAT_TYPE_VOID)
 240          break;
 241
 242    if (i == 4)
 243       return -1;
 244
 245    return i;
 246 }
 247
 248 enum vk_swizzle
 249 {
 250    VK_SWIZZLE_X,
 251    VK_SWIZZLE_Y,
 252    VK_SWIZZLE_Z,
 253    VK_SWIZZLE_W,
 254    VK_SWIZZLE_0,
 255    VK_SWIZZLE_1,
 256    VK_SWIZZLE_NONE,
 257    VK_SWIZZLE_MAX, /**< Number of enums counter (must be last) */
 258 };
 259
 260 static inline VkImageAspectFlags
 261 vk_format_aspects(VkFormat format)
 262 {
 263    switch (format) {
 264    case VK_FORMAT_UNDEFINED:
 265       return 0;
 266
 267    case VK_FORMAT_S8_UINT:
 268       return VK_IMAGE_ASPECT_STENCIL_BIT;
 269
 270    case VK_FORMAT_D16_UNORM_S8_UINT:
 271    case VK_FORMAT_D24_UNORM_S8_UINT:
 272    case VK_FORMAT_D32_SFLOAT_S8_UINT:
 273       return VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT;
 274
 275    case VK_FORMAT_D16_UNORM:
 276    case VK_FORMAT_X8_D24_UNORM_PACK32:
 277    case VK_FORMAT_D32_SFLOAT:
 278       return VK_IMAGE_ASPECT_DEPTH_BIT;
 279
 280    default:
 281       return VK_IMAGE_ASPECT_COLOR_BIT;
 282    }
 283 }
 284
 285 static inline enum vk_swizzle
 286 tu_swizzle_conv(VkComponentSwizzle component,
 287                 const unsigned char chan[4],
 288                 VkComponentSwizzle vk_swiz)
 289 {
 290    int x;
 291
 292    if (vk_swiz == VK_COMPONENT_SWIZZLE_IDENTITY)
 293       vk_swiz = component;
 294    switch (vk_swiz) {
 295    case VK_COMPONENT_SWIZZLE_ZERO:
 296       return VK_SWIZZLE_0;
 297    case VK_COMPONENT_SWIZZLE_ONE:
 298       return VK_SWIZZLE_1;
 299    case VK_COMPONENT_SWIZZLE_R:
 300       for (x = 0; x < 4; x++)
 301          if (chan[x] == 0)
 302             return x;
 303       return VK_SWIZZLE_0;
 304    case VK_COMPONENT_SWIZZLE_G:
 305       for (x = 0; x < 4; x++)
 306          if (chan[x] == 1)
 307             return x;
 308       return VK_SWIZZLE_0;
 309    case VK_COMPONENT_SWIZZLE_B:
 310       for (x = 0; x < 4; x++)
 311          if (chan[x] == 2)
 312             return x;
 313       return VK_SWIZZLE_0;
 314    case VK_COMPONENT_SWIZZLE_A:
 315       for (x = 0; x < 4; x++)
 316          if (chan[x] == 3)
 317             return x;
 318       return VK_SWIZZLE_1;
 319    default:
 320       unreachable("Illegal swizzle");
 321    }
 322 }
 323
 324 static inline void
 325 vk_format_compose_swizzles(const VkComponentMapping *mapping,
 326                            const unsigned char swz[4],
 327                            enum vk_swizzle dst[4])
 328 {
 329    dst[0] = tu_swizzle_conv(VK_COMPONENT_SWIZZLE_R, swz, mapping->r);
 330    dst[1] = tu_swizzle_conv(VK_COMPONENT_SWIZZLE_G, swz, mapping->g);
 331    dst[2] = tu_swizzle_conv(VK_COMPONENT_SWIZZLE_B, swz, mapping->b);
 332    dst[3] = tu_swizzle_conv(VK_COMPONENT_SWIZZLE_A, swz, mapping->a);
 333 }
 334
 335 static inline bool
 336 vk_format_is_compressed(VkFormat format)
 337 {
 338    const struct vk_format_description *desc = vk_format_description(format);
 339
 340    assert(desc);
 341    if (!desc) {
 342       return false;
 343    }
 344
 345    switch (desc->layout) {
 346    case VK_FORMAT_LAYOUT_S3TC:
 347    case VK_FORMAT_LAYOUT_RGTC:
 348    case VK_FORMAT_LAYOUT_ETC:
 349    case VK_FORMAT_LAYOUT_BPTC:
 350    case VK_FORMAT_LAYOUT_ASTC:
 351       /* XXX add other formats in the future */
 352       return true;
 353    default:
 354       return false;
 355    }
 356 }
 357
 358 static inline bool
 359 vk_format_has_depth(const struct vk_format_description *desc)
 360 {
 361    return desc->colorspace == VK_FORMAT_COLORSPACE_ZS &&
 362           desc->swizzle[0] != VK_SWIZZLE_NONE;
 363 }
 364
 365 static inline bool
 366 vk_format_has_stencil(const struct vk_format_description *desc)
 367 {
 368    return desc->colorspace == VK_FORMAT_COLORSPACE_ZS &&
 369           desc->swizzle[1] != VK_SWIZZLE_NONE;
 370 }
 371
 372 static inline bool
 373 vk_format_is_depth_or_stencil(VkFormat format)
 374 {
 375    const struct vk_format_description *desc = vk_format_description(format);
 376
 377    assert(desc);
 378    if (!desc) {
 379       return false;
 380    }
 381
 382    return vk_format_has_depth(desc) || vk_format_has_stencil(desc);
 383 }
 384
 385 static inline bool
 386 vk_format_is_depth(VkFormat format)
 387 {
 388    const struct vk_format_description *desc = vk_format_description(format);
 389
 390    assert(desc);
 391    if (!desc) {
 392       return false;
 393    }
 394
 395    return vk_format_has_depth(desc);
 396 }
 397
 398 static inline bool
 399 vk_format_is_stencil(VkFormat format)
 400 {
 401    const struct vk_format_description *desc = vk_format_description(format);
 402
 403    assert(desc);
 404    if (!desc) {
 405       return false;
 406    }
 407
 408    return vk_format_has_stencil(desc);
 409 }
 410
 411 static inline bool
 412 vk_format_is_color(VkFormat format)
 413 {
 414    return !vk_format_is_depth_or_stencil(format);
 415 }
 416
 417 static inline bool
 418 vk_format_has_alpha(VkFormat format)
 419 {
 420    const struct vk_format_description *desc = vk_format_description(format);
 421
 422    return (desc->colorspace == VK_FORMAT_COLORSPACE_RGB ||
 423            desc->colorspace == VK_FORMAT_COLORSPACE_SRGB) &&
 424           desc->swizzle[3] != VK_SWIZZLE_1;
 425 }
 426
 427 static inline VkFormat
 428 vk_format_depth_only(VkFormat format)
 429 {
 430    switch (format) {
 431    case VK_FORMAT_D16_UNORM_S8_UINT:
 432       return VK_FORMAT_D16_UNORM;
 433    case VK_FORMAT_D24_UNORM_S8_UINT:
 434       return VK_FORMAT_X8_D24_UNORM_PACK32;
 435    case VK_FORMAT_D32_SFLOAT_S8_UINT:
 436       return VK_FORMAT_D32_SFLOAT;
 437    default:
 438       return format;
 439    }
 440 }
 441
 442 static inline bool
 443 vk_format_is_int(VkFormat format)
 444 {
 445    const struct vk_format_description *desc = vk_format_description(format);
 446    int channel = vk_format_get_first_non_void_channel(format);
 447
 448    return channel >= 0 && desc->channel[channel].pure_integer;
 449 }
 450
 451 static inline bool
 452 vk_format_is_srgb(VkFormat format)
 453 {
 454    const struct vk_format_description *desc = vk_format_description(format);
 455    return desc->colorspace == VK_FORMAT_COLORSPACE_SRGB;
 456 }
 457
 458 static inline VkFormat
 459 vk_format_no_srgb(VkFormat format)
 460 {
 461    switch (format) {
 462    case VK_FORMAT_R8_SRGB:
 463       return VK_FORMAT_R8_UNORM;
 464    case VK_FORMAT_R8G8_SRGB:
 465       return VK_FORMAT_R8G8_UNORM;
 466    case VK_FORMAT_R8G8B8_SRGB:
 467       return VK_FORMAT_R8G8B8_UNORM;
 468    case VK_FORMAT_B8G8R8_SRGB:
 469       return VK_FORMAT_B8G8R8_UNORM;
 470    case VK_FORMAT_R8G8B8A8_SRGB:
 471       return VK_FORMAT_R8G8B8A8_UNORM;
 472    case VK_FORMAT_B8G8R8A8_SRGB:
 473       return VK_FORMAT_B8G8R8A8_UNORM;
 474    case VK_FORMAT_A8B8G8R8_SRGB_PACK32:
 475       return VK_FORMAT_A8B8G8R8_UNORM_PACK32;
 476    case VK_FORMAT_BC1_RGB_SRGB_BLOCK:
 477       return VK_FORMAT_BC1_RGB_UNORM_BLOCK;
 478    case VK_FORMAT_BC1_RGBA_SRGB_BLOCK:
 479       return VK_FORMAT_BC1_RGBA_UNORM_BLOCK;
 480    case VK_FORMAT_BC2_SRGB_BLOCK:
 481       return VK_FORMAT_BC2_UNORM_BLOCK;
 482    case VK_FORMAT_BC3_SRGB_BLOCK:
 483       return VK_FORMAT_BC3_UNORM_BLOCK;
 484    case VK_FORMAT_BC7_SRGB_BLOCK:
 485       return VK_FORMAT_BC7_UNORM_BLOCK;
 486    case VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK:
 487       return VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK;
 488    case VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK:
 489       return VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK;
 490    case VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK:
 491       return VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK;
 492    default:
 493       assert(!vk_format_is_srgb(format));
 494       return format;
 495    }
 496 }
 497
 498 static inline VkFormat
 499 vk_format_stencil_only(VkFormat format)
 500 {
 501    return VK_FORMAT_S8_UINT;
 502 }
 503
 504 static inline unsigned
 505 vk_format_get_component_bits(VkFormat format,
 506                              enum vk_format_colorspace colorspace,
 507                              unsigned component)
 508 {
 509    const struct vk_format_description *desc = vk_format_description(format);
 510    enum vk_format_colorspace desc_colorspace;
 511
 512    assert(format);
 513    if (!format) {
 514       return 0;
 515    }
 516
 517    assert(component < 4);
 518
 519    /* Treat RGB and SRGB as equivalent. */
 520    if (colorspace == VK_FORMAT_COLORSPACE_SRGB) {
 521       colorspace = VK_FORMAT_COLORSPACE_RGB;
 522    }
 523    if (desc->colorspace == VK_FORMAT_COLORSPACE_SRGB) {
 524       desc_colorspace = VK_FORMAT_COLORSPACE_RGB;
 525    } else {
 526       desc_colorspace = desc->colorspace;
 527    }
 528
 529    if (desc_colorspace != colorspace) {
 530       return 0;
 531    }
 532
 533    switch (desc->swizzle[component]) {
 534    case VK_SWIZZLE_X:
 535       return desc->channel[0].size;
 536    case VK_SWIZZLE_Y:
 537       return desc->channel[1].size;
 538    case VK_SWIZZLE_Z:
 539       return desc->channel[2].size;
 540    case VK_SWIZZLE_W:
 541       return desc->channel[3].size;
 542    default:
 543       return 0;
 544    }
 545 }
 546
 547 static inline VkFormat
 548 vk_to_non_srgb_format(VkFormat format)
 549 {
 550    switch (format) {
 551    case VK_FORMAT_R8_SRGB:
 552       return VK_FORMAT_R8_UNORM;
 553    case VK_FORMAT_R8G8_SRGB:
 554       return VK_FORMAT_R8G8_UNORM;
 555    case VK_FORMAT_R8G8B8_SRGB:
 556       return VK_FORMAT_R8G8B8_UNORM;
 557    case VK_FORMAT_B8G8R8_SRGB:
 558       return VK_FORMAT_B8G8R8_UNORM;
 559    case VK_FORMAT_R8G8B8A8_SRGB:
 560       return VK_FORMAT_R8G8B8A8_UNORM;
 561    case VK_FORMAT_B8G8R8A8_SRGB:
 562       return VK_FORMAT_B8G8R8A8_UNORM;
 563    case VK_FORMAT_A8B8G8R8_SRGB_PACK32:
 564       return VK_FORMAT_A8B8G8R8_UNORM_PACK32;
 565    default:
 566       return format;
 567    }
 568 }
 569
 570 static inline unsigned
 571 vk_format_get_nr_components(VkFormat format)
 572 {
 573    const struct vk_format_description *desc = vk_format_description(format);
 574    return desc->nr_channels;
 575 }
 576
 577 #endif /* VK_FORMAT_H */