src/gallium/drivers/vc5/vc5_formats.c

   1 /*
   2  * Copyright © 2014-2017 Broadcom
   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  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * @file vc5_formats.c
  26  *
  27  * Contains the table and accessors for VC5 texture and render target format
  28  * support.
  29  *
  30  * The hardware has limited support for texture formats, and extremely limited
  31  * support for render target formats.  As a result, we emulate other formats
  32  * in our shader code, and this stores the table for doing so.
  33  */
  34
  35 #include "util/u_format.h"
  36 #include "util/macros.h"
  37
  38 #include "vc5_context.h"
  39 #include "broadcom/cle/v3d_packet_v33_pack.h"
  40
  41 #define OUTPUT_IMAGE_FORMAT_NO 255
  42
  43 struct vc5_format {
  44         /** Set if the pipe format is defined in the table. */
  45         bool present;
  46
  47         /** One of V3D33_OUTPUT_IMAGE_FORMAT_*, or OUTPUT_IMAGE_FORMAT_NO */
  48         uint8_t rt_type;
  49
  50         /** One of V3D33_TEXTURE_DATA_FORMAT_*. */
  51         uint8_t tex_type;
  52
  53         /**
  54          * Swizzle to apply to the RGBA shader output for storing to the tile
  55          * buffer, to the RGBA tile buffer to produce shader input (for
  56          * blending), and for turning the rgba8888 texture sampler return
  57          * value into shader rgba values.
  58          */
  59         uint8_t swizzle[4];
  60
  61         /* Whether the return value is 16F/I/UI or 32F/I/UI. */
  62         uint8_t return_size;
  63
  64         /* If return_size == 32, how many channels are returned by texturing.
  65          * 16 always returns 2 pairs of 16 bit values.
  66          */
  67         uint8_t return_channels;
  68 };
  69
  70 #define SWIZ(x,y,z,w) {          \
  71         PIPE_SWIZZLE_##x, \
  72         PIPE_SWIZZLE_##y, \
  73         PIPE_SWIZZLE_##z, \
  74         PIPE_SWIZZLE_##w  \
  75 }
  76
  77 #define FORMAT(pipe, rt, tex, swiz, return_size, return_channels)       \
  78         [PIPE_FORMAT_##pipe] = {                                        \
  79                 true,                                                   \
  80                 OUTPUT_IMAGE_FORMAT_##rt,                               \
  81                 TEXTURE_DATA_FORMAT_##tex,                              \
  82                 swiz,                                                   \
  83                 return_size,                                            \
  84                 return_channels,                                        \
  85         }
  86
  87 #define SWIZ_X001       SWIZ(X, 0, 0, 1)
  88 #define SWIZ_XY01       SWIZ(X, Y, 0, 1)
  89 #define SWIZ_XYZ1       SWIZ(X, Y, Z, 1)
  90 #define SWIZ_XYZW       SWIZ(X, Y, Z, W)
  91 #define SWIZ_YZWX       SWIZ(Y, Z, W, X)
  92 #define SWIZ_YZW1       SWIZ(Y, Z, W, 1)
  93 #define SWIZ_ZYXW       SWIZ(Z, Y, X, W)
  94 #define SWIZ_ZYX1       SWIZ(Z, Y, X, 1)
  95 #define SWIZ_XXXY       SWIZ(X, X, X, Y)
  96 #define SWIZ_XXX1       SWIZ(X, X, X, 1)
  97 #define SWIZ_XXXX       SWIZ(X, X, X, X)
  98 #define SWIZ_000X       SWIZ(0, 0, 0, X)
  99
 100 static const struct vc5_format vc5_format_table[] = {
 101         FORMAT(B8G8R8A8_UNORM,    RGBA8,        RGBA8,       SWIZ_ZYXW, 16, 0),
 102         FORMAT(B8G8R8X8_UNORM,    RGBX8,        RGBA8,       SWIZ_ZYX1, 16, 0),
 103         FORMAT(B8G8R8A8_SRGB,     SRGB8_ALPHA8, RGBA8,       SWIZ_ZYXW, 16, 0),
 104         FORMAT(B8G8R8X8_SRGB,     SRGBX8,       RGBA8,       SWIZ_ZYX1, 16, 0),
 105         FORMAT(R8G8B8A8_UNORM,    RGBA8,        RGBA8,       SWIZ_XYZW, 16, 0),
 106         FORMAT(R8G8B8X8_UNORM,    RGBX8,        RGBA8,       SWIZ_XYZ1, 16, 0),
 107         FORMAT(R8G8B8A8_SNORM,    NO,           RGBA8_SNORM, SWIZ_XYZW, 16, 0),
 108         FORMAT(R8G8B8X8_SNORM,    NO,           RGBA8_SNORM, SWIZ_XYZ1, 16, 0),
 109         FORMAT(R10G10B10A2_UNORM, RGB10_A2,     RGB10_A2,    SWIZ_XYZW, 16, 0),
 110
 111         FORMAT(B4G4R4A4_UNORM,    ABGR4444,     RGBA4,       SWIZ_YZWX, 16, 0),
 112         FORMAT(B4G4R4X4_UNORM,    ABGR4444,     RGBA4,       SWIZ_YZW1, 16, 0),
 113
 114         FORMAT(A1B5G5R5_UNORM,    ABGR1555,     RGB5_A1,     SWIZ_XYZW, 16, 0),
 115         FORMAT(X1B5G5R5_UNORM,    ABGR1555,     RGB5_A1,     SWIZ_XYZ1, 16, 0),
 116         FORMAT(B5G6R5_UNORM,      BGR565,       RGB565,      SWIZ_XYZ1, 16, 0),
 117
 118         FORMAT(R8_UNORM,          R8,           R8,          SWIZ_X001, 16, 0),
 119         FORMAT(R8_SNORM,          NO,           R8_SNORM,    SWIZ_X001, 16, 0),
 120         FORMAT(R8G8_UNORM,        RG8,          RG8,         SWIZ_XY01, 16, 0),
 121         FORMAT(R8G8_SNORM,        NO,           RG8_SNORM,   SWIZ_XY01, 16, 0),
 122
 123         FORMAT(R16_UNORM,         NO,           R16,         SWIZ_X001, 32, 1),
 124         FORMAT(R16_SNORM,         NO,           R16_SNORM,   SWIZ_X001, 32, 1),
 125         FORMAT(R16_FLOAT,         R16F,         R16F,        SWIZ_X001, 16, 0),
 126         FORMAT(R32_FLOAT,         R32F,         R32F,        SWIZ_X001, 32, 1),
 127
 128         FORMAT(R16G16_UNORM,      NO,           RG16,        SWIZ_XY01, 32, 2),
 129         FORMAT(R16G16_SNORM,      NO,           RG16_SNORM,  SWIZ_XY01, 32, 2),
 130         FORMAT(R16G16_FLOAT,      RG16F,        RG16F,       SWIZ_XY01, 16, 0),
 131         FORMAT(R32G32_FLOAT,      RG32F,        RG32F,       SWIZ_XY01, 32, 2),
 132
 133         FORMAT(R16G16B16A16_UNORM, NO,          RGBA16,      SWIZ_XYZW, 32, 4),
 134         FORMAT(R16G16B16A16_SNORM, NO,          RGBA16_SNORM, SWIZ_XYZW, 32, 4),
 135         FORMAT(R16G16B16A16_FLOAT, RGBA16F,     RGBA16F,     SWIZ_XYZW, 16, 0),
 136         FORMAT(R32G32B32A32_FLOAT, RGBA32F,     RGBA32F,     SWIZ_XYZW, 32, 4),
 137
 138         /* If we don't have L/A/LA16, mesa/st will fall back to RGBA16. */
 139         FORMAT(L16_UNORM,         NO,           R16,         SWIZ_XXX1, 32, 1),
 140         FORMAT(L16_SNORM,         NO,           R16_SNORM,   SWIZ_XXX1, 32, 1),
 141         FORMAT(I16_UNORM,         NO,           R16,         SWIZ_XXXX, 32, 1),
 142         FORMAT(I16_SNORM,         NO,           R16_SNORM,   SWIZ_XXXX, 32, 1),
 143         FORMAT(A16_UNORM,         NO,           R16,         SWIZ_000X, 32, 1),
 144         FORMAT(A16_SNORM,         NO,           R16_SNORM,   SWIZ_000X, 32, 1),
 145         FORMAT(L16A16_UNORM,      NO,           RG16,        SWIZ_XXXY, 32, 2),
 146         FORMAT(L16A16_SNORM,      NO,           RG16_SNORM,  SWIZ_XXXY, 32, 2),
 147
 148         FORMAT(A8_UNORM,          NO,           R8,          SWIZ_000X, 16, 0),
 149         FORMAT(L8_UNORM,          NO,           R8,          SWIZ_XXX1, 16, 0),
 150         FORMAT(I8_UNORM,          NO,           R8,          SWIZ_XXXX, 16, 0),
 151         FORMAT(L8A8_UNORM,        NO,           RG8,         SWIZ_XXXY, 16, 0),
 152
 153         FORMAT(R8_SINT,           R8I,          S8,          SWIZ_X001, 16, 0),
 154         FORMAT(R8_UINT,           R8UI,         S8,          SWIZ_X001, 16, 0),
 155         FORMAT(R8G8_SINT,         RG8I,         S16,         SWIZ_XY01, 16, 0),
 156         FORMAT(R8G8_UINT,         RG8UI,        S16,         SWIZ_XY01, 16, 0),
 157         FORMAT(R8G8B8A8_SINT,     RGBA8I,       R32F,        SWIZ_XYZW, 16, 0),
 158         FORMAT(R8G8B8A8_UINT,     RGBA8UI,      R32F,        SWIZ_XYZW, 16, 0),
 159
 160         FORMAT(R16_SINT,          R16I,         S16,         SWIZ_X001, 16, 0),
 161         FORMAT(R16_UINT,          R16UI,        S16,         SWIZ_X001, 16, 0),
 162         FORMAT(R16G16_SINT,       RG16I,        R32F,        SWIZ_XY01, 16, 0),
 163         FORMAT(R16G16_UINT,       RG16UI,       R32F,        SWIZ_XY01, 16, 0),
 164         FORMAT(R16G16B16A16_SINT, RGBA16I,      RG32F,       SWIZ_XYZW, 16, 0),
 165         FORMAT(R16G16B16A16_UINT, RGBA16UI,     RG32F,       SWIZ_XYZW, 16, 0),
 166
 167         FORMAT(R32_SINT,          R32I,         R32F,        SWIZ_X001, 16, 0),
 168         FORMAT(R32_UINT,          R32UI,        R32F,        SWIZ_X001, 16, 0),
 169         FORMAT(R32G32_SINT,       RG32I,        RG32F,       SWIZ_XY01, 16, 0),
 170         FORMAT(R32G32_UINT,       RG32UI,       RG32F,       SWIZ_XY01, 16, 0),
 171         FORMAT(R32G32B32A32_SINT, RGBA32I,      RGBA32F,     SWIZ_XYZW, 16, 0),
 172         FORMAT(R32G32B32A32_UINT, RGBA32UI,     RGBA32F,     SWIZ_XYZW, 16, 0),
 173
 174         FORMAT(A8_SINT,           R8I,          S8,          SWIZ_000X, 16, 0),
 175         FORMAT(A8_UINT,           R8UI,         S8,          SWIZ_000X, 16, 0),
 176         FORMAT(A16_SINT,          R16I,         S16,         SWIZ_000X, 16, 0),
 177         FORMAT(A16_UINT,          R16UI,        S16,         SWIZ_000X, 16, 0),
 178         FORMAT(A32_SINT,          R32I,         R32F,        SWIZ_000X, 16, 0),
 179         FORMAT(A32_UINT,          R32UI,        R32F,        SWIZ_000X, 16, 0),
 180
 181         FORMAT(R11G11B10_FLOAT,   R11F_G11F_B10F, R11F_G11F_B10F, SWIZ_XYZW, 16, 0),
 182         FORMAT(R9G9B9E5_FLOAT,    NO,           RGB9_E5,     SWIZ_XYZW, 16, 0),
 183
 184         FORMAT(S8_UINT_Z24_UNORM, DEPTH24_STENCIL8, DEPTH24_X8, SWIZ_X001, 32, 1),
 185         FORMAT(X8Z24_UNORM,       DEPTH_COMPONENT24, DEPTH24_X8, SWIZ_X001, 32, 1),
 186         FORMAT(S8X24_UINT,        NO,           R32F,        SWIZ_X001, 32, 1),
 187         FORMAT(Z32_FLOAT,         DEPTH_COMPONENT32F, R32F, SWIZ_X001, 32, 1),
 188         FORMAT(Z16_UNORM,         DEPTH_COMPONENT16,  DEPTH_COMP16, SWIZ_X001, 32, 1),
 189
 190         /* Pretend we support this, but it'll be separate Z32F depth and S8. */
 191         FORMAT(Z32_FLOAT_S8X24_UINT, DEPTH_COMPONENT32F, R32F, SWIZ_X001, 32, 1),
 192
 193         FORMAT(ETC2_RGB8,         NO,           RGB8_ETC2,   SWIZ_XYZ1, 16, 0),
 194         FORMAT(ETC2_SRGB8,        NO,           RGB8_ETC2,   SWIZ_XYZ1, 16, 0),
 195         FORMAT(ETC2_RGB8A1,       NO,           RGB8_PUNCHTHROUGH_ALPHA1, SWIZ_XYZW, 16, 0),
 196         FORMAT(ETC2_SRGB8A1,      NO,           RGB8_PUNCHTHROUGH_ALPHA1, SWIZ_XYZW, 16, 0),
 197         FORMAT(ETC2_RGBA8,        NO,           RGBA8_ETC2_EAC, SWIZ_XYZW, 16, 0),
 198         FORMAT(ETC2_R11_UNORM,    NO,           R11_EAC,     SWIZ_X001, 16, 0),
 199         FORMAT(ETC2_R11_SNORM,    NO,           SIGNED_R11_EAC, SWIZ_X001, 16, 0),
 200         FORMAT(ETC2_RG11_UNORM,   NO,           RG11_EAC,    SWIZ_XY01, 16, 0),
 201         FORMAT(ETC2_RG11_SNORM,   NO,           SIGNED_RG11_EAC, SWIZ_XY01, 16, 0),
 202
 203         FORMAT(DXT1_RGB,          NO,           BC1,         SWIZ_XYZ1, 16, 0),
 204         FORMAT(DXT3_RGBA,         NO,           BC2,         SWIZ_XYZ1, 16, 0),
 205         FORMAT(DXT5_RGBA,         NO,           BC3,         SWIZ_XYZ1, 16, 0),
 206 };
 207
 208 static const struct vc5_format *
 209 get_format(enum pipe_format f)
 210 {
 211         if (f >= ARRAY_SIZE(vc5_format_table) ||
 212             !vc5_format_table[f].present)
 213                 return NULL;
 214         else
 215                 return &vc5_format_table[f];
 216 }
 217
 218 bool
 219 vc5_rt_format_supported(enum pipe_format f)
 220 {
 221         const struct vc5_format *vf = get_format(f);
 222
 223         if (!vf)
 224                 return false;
 225
 226         return vf->rt_type != OUTPUT_IMAGE_FORMAT_NO;
 227 }
 228
 229 uint8_t
 230 vc5_get_rt_format(enum pipe_format f)
 231 {
 232         const struct vc5_format *vf = get_format(f);
 233
 234         if (!vf)
 235                 return 0;
 236
 237         return vf->rt_type;
 238 }
 239
 240 bool
 241 vc5_tex_format_supported(enum pipe_format f)
 242 {
 243         const struct vc5_format *vf = get_format(f);
 244
 245         return vf != NULL;
 246 }
 247
 248 uint8_t
 249 vc5_get_tex_format(enum pipe_format f)
 250 {
 251         const struct vc5_format *vf = get_format(f);
 252
 253         if (!vf)
 254                 return 0;
 255
 256         return vf->tex_type;
 257 }
 258
 259 uint8_t
 260 vc5_get_tex_return_size(enum pipe_format f)
 261 {
 262         const struct vc5_format *vf = get_format(f);
 263
 264         if (!vf)
 265                 return 0;
 266
 267         return vf->return_size;
 268 }
 269
 270 uint8_t
 271 vc5_get_tex_return_channels(enum pipe_format f)
 272 {
 273         const struct vc5_format *vf = get_format(f);
 274
 275         if (!vf)
 276                 return 0;
 277
 278         return vf->return_channels;
 279 }
 280
 281 const uint8_t *
 282 vc5_get_format_swizzle(enum pipe_format f)
 283 {
 284         const struct vc5_format *vf = get_format(f);
 285         static const uint8_t fallback[] = {0, 1, 2, 3};
 286
 287         if (!vf)
 288                 return fallback;
 289
 290         return vf->swizzle;
 291 }
 292
 293 void
 294 vc5_get_internal_type_bpp_for_output_format(uint32_t format,
 295                                             uint32_t *type,
 296                                             uint32_t *bpp)
 297 {
 298         switch (format) {
 299         case OUTPUT_IMAGE_FORMAT_RGBA8:
 300         case OUTPUT_IMAGE_FORMAT_RGBX8:
 301         case OUTPUT_IMAGE_FORMAT_RGB8:
 302         case OUTPUT_IMAGE_FORMAT_RG8:
 303         case OUTPUT_IMAGE_FORMAT_R8:
 304         case OUTPUT_IMAGE_FORMAT_ABGR4444:
 305         case OUTPUT_IMAGE_FORMAT_BGR565:
 306         case OUTPUT_IMAGE_FORMAT_ABGR1555:
 307                 *type = INTERNAL_TYPE_8;
 308                 *bpp = INTERNAL_BPP_32;
 309                 break;
 310
 311         case OUTPUT_IMAGE_FORMAT_RGBA8I:
 312         case OUTPUT_IMAGE_FORMAT_RG8I:
 313         case OUTPUT_IMAGE_FORMAT_R8I:
 314                 *type = INTERNAL_TYPE_8I;
 315                 *bpp = INTERNAL_BPP_32;
 316                 break;
 317
 318         case OUTPUT_IMAGE_FORMAT_RGBA8UI:
 319         case OUTPUT_IMAGE_FORMAT_RG8UI:
 320         case OUTPUT_IMAGE_FORMAT_R8UI:
 321                 *type = INTERNAL_TYPE_8UI;
 322                 *bpp = INTERNAL_BPP_32;
 323                 break;
 324
 325         case OUTPUT_IMAGE_FORMAT_SRGB8_ALPHA8:
 326         case OUTPUT_IMAGE_FORMAT_SRGB:
 327         case OUTPUT_IMAGE_FORMAT_RGB10_A2:
 328         case OUTPUT_IMAGE_FORMAT_R11F_G11F_B10F:
 329         case OUTPUT_IMAGE_FORMAT_SRGBX8:
 330         case OUTPUT_IMAGE_FORMAT_RGBA16F:
 331                 /* Note that sRGB RTs are stored in the tile buffer at 16F,
 332                  * and the conversion to sRGB happens at tilebuffer
 333                  * load/store.
 334                  */
 335                 *type = INTERNAL_TYPE_16F;
 336                 *bpp = INTERNAL_BPP_64;
 337                 break;
 338
 339         case OUTPUT_IMAGE_FORMAT_RG16F:
 340         case OUTPUT_IMAGE_FORMAT_R16F:
 341                 *type = INTERNAL_TYPE_16F;
 342                 /* Use 64bpp to make sure the TLB doesn't throw away the alpha
 343                  * channel before alpha test happens.
 344                  */
 345                 *bpp = INTERNAL_BPP_64;
 346                 break;
 347
 348         case OUTPUT_IMAGE_FORMAT_RGBA16I:
 349                 *type = INTERNAL_TYPE_16I;
 350                 *bpp = INTERNAL_BPP_64;
 351                 break;
 352         case OUTPUT_IMAGE_FORMAT_RG16I:
 353         case OUTPUT_IMAGE_FORMAT_R16I:
 354                 *type = INTERNAL_TYPE_16I;
 355                 *bpp = INTERNAL_BPP_32;
 356                 break;
 357
 358         case OUTPUT_IMAGE_FORMAT_RGBA16UI:
 359                 *type = INTERNAL_TYPE_16UI;
 360                 *bpp = INTERNAL_BPP_64;
 361                 break;
 362         case OUTPUT_IMAGE_FORMAT_RG16UI:
 363         case OUTPUT_IMAGE_FORMAT_R16UI:
 364                 *type = INTERNAL_TYPE_16UI;
 365                 *bpp = INTERNAL_BPP_32;
 366                 break;
 367
 368         case OUTPUT_IMAGE_FORMAT_RGBA32I:
 369                 *type = INTERNAL_TYPE_32I;
 370                 *bpp = INTERNAL_BPP_128;
 371                 break;
 372         case OUTPUT_IMAGE_FORMAT_RG32I:
 373                 *type = INTERNAL_TYPE_32I;
 374                 *bpp = INTERNAL_BPP_64;
 375                 break;
 376         case OUTPUT_IMAGE_FORMAT_R32I:
 377                 *type = INTERNAL_TYPE_32I;
 378                 *bpp = INTERNAL_BPP_32;
 379                 break;
 380
 381         case OUTPUT_IMAGE_FORMAT_RGBA32UI:
 382                 *type = INTERNAL_TYPE_32UI;
 383                 *bpp = INTERNAL_BPP_128;
 384                 break;
 385         case OUTPUT_IMAGE_FORMAT_RG32UI:
 386                 *type = INTERNAL_TYPE_32UI;
 387                 *bpp = INTERNAL_BPP_64;
 388                 break;
 389         case OUTPUT_IMAGE_FORMAT_R32UI:
 390                 *type = INTERNAL_TYPE_32UI;
 391                 *bpp = INTERNAL_BPP_32;
 392                 break;
 393
 394         case OUTPUT_IMAGE_FORMAT_RGBA32F:
 395                 *type = INTERNAL_TYPE_32F;
 396                 *bpp = INTERNAL_BPP_128;
 397                 break;
 398         case OUTPUT_IMAGE_FORMAT_RG32F:
 399                 *type = INTERNAL_TYPE_32F;
 400                 *bpp = INTERNAL_BPP_64;
 401                 break;
 402         case OUTPUT_IMAGE_FORMAT_R32F:
 403                 *type = INTERNAL_TYPE_32F;
 404                 *bpp = INTERNAL_BPP_32;
 405                 break;
 406
 407         default:
 408                 /* Provide some default values, as we'll be called at RB
 409                  * creation time, even if an RB with this format isn't
 410                  * supported.
 411                  */
 412                 *type = INTERNAL_TYPE_8;
 413                 *bpp = INTERNAL_BPP_32;
 414                 break;
 415         }
 416 }