src/gallium/drivers/v3d/v3dx_format_table.c

   1 /*
   2  * Copyright © 2014-2018 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 #include "util/format/u_format.h"
  25
  26 #include "v3d_context.h"
  27 #include "broadcom/cle/v3dx_pack.h"
  28 #include "broadcom/common/v3d_macros.h"
  29 #include "v3d_format_table.h"
  30
  31 #define SWIZ(x,y,z,w) {          \
  32         PIPE_SWIZZLE_##x, \
  33         PIPE_SWIZZLE_##y, \
  34         PIPE_SWIZZLE_##z, \
  35         PIPE_SWIZZLE_##w  \
  36 }
  37
  38 #define FORMAT(pipe, rt, tex, swiz, return_size, return_channels)       \
  39         [PIPE_FORMAT_##pipe] = {                                        \
  40                 true,                                                   \
  41                 V3D_OUTPUT_IMAGE_FORMAT_##rt,                           \
  42                 TEXTURE_DATA_FORMAT_##tex,                              \
  43                 swiz,                                                   \
  44                 return_size,                                            \
  45                 return_channels,                                        \
  46         }
  47
  48 #define SWIZ_X001       SWIZ(X, 0, 0, 1)
  49 #define SWIZ_XY01       SWIZ(X, Y, 0, 1)
  50 #define SWIZ_XYZ1       SWIZ(X, Y, Z, 1)
  51 #define SWIZ_XYZW       SWIZ(X, Y, Z, W)
  52 #define SWIZ_YZWX       SWIZ(Y, Z, W, X)
  53 #define SWIZ_YZW1       SWIZ(Y, Z, W, 1)
  54 #define SWIZ_ZYXW       SWIZ(Z, Y, X, W)
  55 #define SWIZ_ZYX1       SWIZ(Z, Y, X, 1)
  56 #define SWIZ_XXXY       SWIZ(X, X, X, Y)
  57 #define SWIZ_XXX1       SWIZ(X, X, X, 1)
  58 #define SWIZ_XXXX       SWIZ(X, X, X, X)
  59 #define SWIZ_000X       SWIZ(0, 0, 0, X)
  60
  61 static const struct v3d_format format_table[] = {
  62         FORMAT(B8G8R8A8_UNORM,    RGBA8,        RGBA8,       SWIZ_ZYXW, 16, 0),
  63         FORMAT(B8G8R8X8_UNORM,    RGBA8,        RGBA8,       SWIZ_ZYX1, 16, 0),
  64         FORMAT(B8G8R8A8_SRGB,     SRGB8_ALPHA8, RGBA8,       SWIZ_ZYXW, 16, 0),
  65         FORMAT(B8G8R8X8_SRGB,     SRGB8_ALPHA8, RGBA8,       SWIZ_ZYX1, 16, 0),
  66         FORMAT(R8G8B8A8_UNORM,    RGBA8,        RGBA8,       SWIZ_XYZW, 16, 0),
  67         FORMAT(R8G8B8X8_UNORM,    RGBA8,        RGBA8,       SWIZ_XYZ1, 16, 0),
  68         FORMAT(R8G8B8A8_SRGB,     SRGB8_ALPHA8, RGBA8,       SWIZ_XYZW, 16, 0),
  69         FORMAT(R8G8B8X8_SRGB,     SRGB8_ALPHA8, RGBA8,       SWIZ_XYZ1, 16, 0),
  70         FORMAT(R8G8B8A8_SNORM,    NO,           RGBA8_SNORM, SWIZ_XYZW, 16, 0),
  71         FORMAT(R8G8B8X8_SNORM,    NO,           RGBA8_SNORM, SWIZ_XYZ1, 16, 0),
  72         FORMAT(R10G10B10A2_UNORM, RGB10_A2,     RGB10_A2,    SWIZ_XYZW, 16, 0),
  73         FORMAT(R10G10B10A2_UINT,  RGB10_A2UI,   RGB10_A2UI,  SWIZ_XYZW, 16, 0),
  74
  75         FORMAT(A4B4G4R4_UNORM,    ABGR4444,     RGBA4,       SWIZ_XYZW, 16, 0),
  76
  77         FORMAT(A1B5G5R5_UNORM,    ABGR1555,     RGB5_A1,     SWIZ_XYZW, 16, 0),
  78         FORMAT(X1B5G5R5_UNORM,    ABGR1555,     RGB5_A1,     SWIZ_XYZ1, 16, 0),
  79         FORMAT(B5G6R5_UNORM,      BGR565,       RGB565,      SWIZ_XYZ1, 16, 0),
  80
  81         FORMAT(R8_UNORM,          R8,           R8,          SWIZ_X001, 16, 0),
  82         FORMAT(R8_SNORM,          NO,           R8_SNORM,    SWIZ_X001, 16, 0),
  83         FORMAT(R8G8_UNORM,        RG8,          RG8,         SWIZ_XY01, 16, 0),
  84         FORMAT(R8G8_SNORM,        NO,           RG8_SNORM,   SWIZ_XY01, 16, 0),
  85
  86         FORMAT(R16_UNORM,         NO,           R16,         SWIZ_X001, 32, 1),
  87         FORMAT(R16_SNORM,         NO,           R16_SNORM,   SWIZ_X001, 32, 1),
  88         FORMAT(R16_FLOAT,         R16F,         R16F,        SWIZ_X001, 16, 0),
  89         FORMAT(R32_FLOAT,         R32F,         R32F,        SWIZ_X001, 32, 1),
  90
  91         FORMAT(R16G16_UNORM,      NO,           RG16,        SWIZ_XY01, 32, 2),
  92         FORMAT(R16G16_SNORM,      NO,           RG16_SNORM,  SWIZ_XY01, 32, 2),
  93         FORMAT(R16G16_FLOAT,      RG16F,        RG16F,       SWIZ_XY01, 16, 0),
  94         FORMAT(R32G32_FLOAT,      RG32F,        RG32F,       SWIZ_XY01, 32, 2),
  95
  96         FORMAT(R16G16B16A16_UNORM, NO,          RGBA16,      SWIZ_XYZW, 32, 4),
  97         FORMAT(R16G16B16A16_SNORM, NO,          RGBA16_SNORM, SWIZ_XYZW, 32, 4),
  98         FORMAT(R16G16B16A16_FLOAT, RGBA16F,     RGBA16F,     SWIZ_XYZW, 16, 0),
  99         FORMAT(R32G32B32A32_FLOAT, RGBA32F,     RGBA32F,     SWIZ_XYZW, 32, 4),
 100
 101         /* If we don't have L/A/LA16, mesa/st will fall back to RGBA16. */
 102         FORMAT(L16_UNORM,         NO,           R16,         SWIZ_XXX1, 32, 1),
 103         FORMAT(L16_SNORM,         NO,           R16_SNORM,   SWIZ_XXX1, 32, 1),
 104         FORMAT(I16_UNORM,         NO,           R16,         SWIZ_XXXX, 32, 1),
 105         FORMAT(I16_SNORM,         NO,           R16_SNORM,   SWIZ_XXXX, 32, 1),
 106         FORMAT(A16_UNORM,         NO,           R16,         SWIZ_000X, 32, 1),
 107         FORMAT(A16_SNORM,         NO,           R16_SNORM,   SWIZ_000X, 32, 1),
 108         FORMAT(L16A16_UNORM,      NO,           RG16,        SWIZ_XXXY, 32, 2),
 109         FORMAT(L16A16_SNORM,      NO,           RG16_SNORM,  SWIZ_XXXY, 32, 2),
 110
 111         FORMAT(A8_UNORM,          NO,           R8,          SWIZ_000X, 16, 0),
 112         FORMAT(L8_UNORM,          NO,           R8,          SWIZ_XXX1, 16, 0),
 113         FORMAT(I8_UNORM,          NO,           R8,          SWIZ_XXXX, 16, 0),
 114         FORMAT(L8A8_UNORM,        NO,           RG8,         SWIZ_XXXY, 16, 0),
 115
 116         FORMAT(R8_SINT,           R8I,          R8I,         SWIZ_X001, 16, 0),
 117         FORMAT(R8_UINT,           R8UI,         R8UI,        SWIZ_X001, 16, 0),
 118         FORMAT(R8G8_SINT,         RG8I,         RG8I,        SWIZ_XY01, 16, 0),
 119         FORMAT(R8G8_UINT,         RG8UI,        RG8UI,       SWIZ_XY01, 16, 0),
 120         FORMAT(R8G8B8A8_SINT,     RGBA8I,       RGBA8I,      SWIZ_XYZW, 16, 0),
 121         FORMAT(R8G8B8A8_UINT,     RGBA8UI,      RGBA8UI,     SWIZ_XYZW, 16, 0),
 122
 123         FORMAT(R16_SINT,          R16I,         R16I,        SWIZ_X001, 16, 0),
 124         FORMAT(R16_UINT,          R16UI,        R16UI,       SWIZ_X001, 16, 0),
 125         FORMAT(R16G16_SINT,       RG16I,        RG16I,       SWIZ_XY01, 16, 0),
 126         FORMAT(R16G16_UINT,       RG16UI,       RG16UI,      SWIZ_XY01, 16, 0),
 127         FORMAT(R16G16B16A16_SINT, RGBA16I,      RGBA16I,     SWIZ_XYZW, 16, 0),
 128         FORMAT(R16G16B16A16_UINT, RGBA16UI,     RGBA16UI,    SWIZ_XYZW, 16, 0),
 129
 130         FORMAT(R32_SINT,          R32I,         R32I,        SWIZ_X001, 32, 1),
 131         FORMAT(R32_UINT,          R32UI,        R32UI,       SWIZ_X001, 32, 1),
 132         FORMAT(R32G32_SINT,       RG32I,        RG32I,       SWIZ_XY01, 32, 2),
 133         FORMAT(R32G32_UINT,       RG32UI,       RG32UI,      SWIZ_XY01, 32, 2),
 134         FORMAT(R32G32B32A32_SINT, RGBA32I,      RGBA32I,     SWIZ_XYZW, 32, 4),
 135         FORMAT(R32G32B32A32_UINT, RGBA32UI,     RGBA32UI,    SWIZ_XYZW, 32, 4),
 136
 137         FORMAT(A8_SINT,           R8I,          R8I,         SWIZ_000X, 16, 0),
 138         FORMAT(A8_UINT,           R8UI,         R8UI,        SWIZ_000X, 16, 0),
 139         FORMAT(A16_SINT,          R16I,         R16I,        SWIZ_000X, 16, 0),
 140         FORMAT(A16_UINT,          R16UI,        R16UI,       SWIZ_000X, 16, 0),
 141         FORMAT(A32_SINT,          R32I,         R32I,        SWIZ_000X, 32, 1),
 142         FORMAT(A32_UINT,          R32UI,        R32UI,       SWIZ_000X, 32, 1),
 143
 144         FORMAT(R11G11B10_FLOAT,   R11F_G11F_B10F, R11F_G11F_B10F, SWIZ_XYZW, 16, 0),
 145         FORMAT(R9G9B9E5_FLOAT,    NO,           RGB9_E5,     SWIZ_XYZW, 16, 0),
 146
 147 #if V3D_VERSION >= 40
 148         FORMAT(S8_UINT_Z24_UNORM, D24S8,        DEPTH24_X8,  SWIZ_XXXX, 32, 1),
 149         FORMAT(X8Z24_UNORM,       D24S8,        DEPTH24_X8,  SWIZ_XXXX, 32, 1),
 150         FORMAT(S8X24_UINT,        S8,           RGBA8UI, SWIZ_XXXX, 16, 1),
 151         FORMAT(Z32_FLOAT,         D32F,         DEPTH_COMP32F, SWIZ_XXXX, 32, 1),
 152         FORMAT(Z16_UNORM,         D16,          DEPTH_COMP16,SWIZ_XXXX, 32, 1),
 153
 154         /* Pretend we support this, but it'll be separate Z32F depth and S8. */
 155         FORMAT(Z32_FLOAT_S8X24_UINT, D32F,      DEPTH_COMP32F, SWIZ_XXXX, 32, 1),
 156         FORMAT(X32_S8X24_UINT,    S8,           R8UI,          SWIZ_XXXX, 16, 1),
 157 #else
 158         FORMAT(S8_UINT_Z24_UNORM, ZS_DEPTH24_STENCIL8, DEPTH24_X8, SWIZ_XXXX, 32, 1),
 159         FORMAT(X8Z24_UNORM,       ZS_DEPTH24_STENCIL8, DEPTH24_X8, SWIZ_XXXX, 32, 1),
 160         FORMAT(S8X24_UINT,        NO,           R32F,        SWIZ_XXXX, 32, 1),
 161         FORMAT(Z32_FLOAT,         ZS_DEPTH_COMPONENT32F, R32F, SWIZ_XXXX, 32, 1),
 162         FORMAT(Z16_UNORM,         ZS_DEPTH_COMPONENT16,  DEPTH_COMP16, SWIZ_XXXX, 32, 1),
 163
 164         /* Pretend we support this, but it'll be separate Z32F depth and S8. */
 165         FORMAT(Z32_FLOAT_S8X24_UINT, ZS_DEPTH_COMPONENT32F, R32F, SWIZ_XXXX, 32, 1),
 166 #endif
 167
 168         FORMAT(ETC2_RGB8,         NO,           RGB8_ETC2,   SWIZ_XYZ1, 16, 0),
 169         FORMAT(ETC2_SRGB8,        NO,           RGB8_ETC2,   SWIZ_XYZ1, 16, 0),
 170         FORMAT(ETC2_RGB8A1,       NO,           RGB8_PUNCHTHROUGH_ALPHA1, SWIZ_XYZW, 16, 0),
 171         FORMAT(ETC2_SRGB8A1,      NO,           RGB8_PUNCHTHROUGH_ALPHA1, SWIZ_XYZW, 16, 0),
 172         FORMAT(ETC2_RGBA8,        NO,           RGBA8_ETC2_EAC, SWIZ_XYZW, 16, 0),
 173         FORMAT(ETC2_SRGBA8,       NO,           RGBA8_ETC2_EAC, SWIZ_XYZW, 16, 0),
 174         FORMAT(ETC2_R11_UNORM,    NO,           R11_EAC,     SWIZ_X001, 16, 0),
 175         FORMAT(ETC2_R11_SNORM,    NO,           SIGNED_R11_EAC, SWIZ_X001, 16, 0),
 176         FORMAT(ETC2_RG11_UNORM,   NO,           RG11_EAC,    SWIZ_XY01, 16, 0),
 177         FORMAT(ETC2_RG11_SNORM,   NO,           SIGNED_RG11_EAC, SWIZ_XY01, 16, 0),
 178
 179         FORMAT(DXT1_RGB,          NO,           BC1,         SWIZ_XYZ1, 16, 0),
 180         FORMAT(DXT1_SRGB,         NO,           BC1,         SWIZ_XYZ1, 16, 0),
 181         FORMAT(DXT1_RGBA,         NO,           BC1,         SWIZ_XYZW, 16, 0),
 182         FORMAT(DXT1_SRGBA,        NO,           BC1,         SWIZ_XYZW, 16, 0),
 183         FORMAT(DXT3_RGBA,         NO,           BC2,         SWIZ_XYZW, 16, 0),
 184         FORMAT(DXT3_SRGBA,        NO,           BC2,         SWIZ_XYZW, 16, 0),
 185         FORMAT(DXT5_RGBA,         NO,           BC3,         SWIZ_XYZW, 16, 0),
 186         FORMAT(DXT5_SRGBA,        NO,           BC3,         SWIZ_XYZW, 16, 0),
 187 };
 188
 189 const struct v3d_format *
 190 v3dX(get_format_desc)(enum pipe_format f)
 191 {
 192         if (f < ARRAY_SIZE(format_table) && format_table[f].present)
 193                 return &format_table[f];
 194         else
 195                 return NULL;
 196 }
 197
 198 void
 199 v3dX(get_internal_type_bpp_for_output_format)(uint32_t format,
 200                                               uint32_t *type,
 201                                               uint32_t *bpp)
 202 {
 203         switch (format) {
 204         case V3D_OUTPUT_IMAGE_FORMAT_RGBA8:
 205 #if V3D_VERSION < 41
 206         case V3D_OUTPUT_IMAGE_FORMAT_RGBX8:
 207 #endif
 208         case V3D_OUTPUT_IMAGE_FORMAT_RGB8:
 209         case V3D_OUTPUT_IMAGE_FORMAT_RG8:
 210         case V3D_OUTPUT_IMAGE_FORMAT_R8:
 211         case V3D_OUTPUT_IMAGE_FORMAT_ABGR4444:
 212         case V3D_OUTPUT_IMAGE_FORMAT_BGR565:
 213         case V3D_OUTPUT_IMAGE_FORMAT_ABGR1555:
 214                 *type = V3D_INTERNAL_TYPE_8;
 215                 *bpp = V3D_INTERNAL_BPP_32;
 216                 break;
 217
 218         case V3D_OUTPUT_IMAGE_FORMAT_RGBA8I:
 219         case V3D_OUTPUT_IMAGE_FORMAT_RG8I:
 220         case V3D_OUTPUT_IMAGE_FORMAT_R8I:
 221                 *type = V3D_INTERNAL_TYPE_8I;
 222                 *bpp = V3D_INTERNAL_BPP_32;
 223                 break;
 224
 225         case V3D_OUTPUT_IMAGE_FORMAT_RGBA8UI:
 226         case V3D_OUTPUT_IMAGE_FORMAT_RG8UI:
 227         case V3D_OUTPUT_IMAGE_FORMAT_R8UI:
 228                 *type = V3D_INTERNAL_TYPE_8UI;
 229                 *bpp = V3D_INTERNAL_BPP_32;
 230                 break;
 231
 232         case V3D_OUTPUT_IMAGE_FORMAT_SRGB8_ALPHA8:
 233         case V3D_OUTPUT_IMAGE_FORMAT_SRGB:
 234         case V3D_OUTPUT_IMAGE_FORMAT_RGB10_A2:
 235         case V3D_OUTPUT_IMAGE_FORMAT_R11F_G11F_B10F:
 236 #if V3D_VERSION < 41
 237         case V3D_OUTPUT_IMAGE_FORMAT_SRGBX8:
 238 #endif
 239         case V3D_OUTPUT_IMAGE_FORMAT_RGBA16F:
 240                 /* Note that sRGB RTs are stored in the tile buffer at 16F,
 241                  * and the conversion to sRGB happens at tilebuffer
 242                  * load/store.
 243                  */
 244                 *type = V3D_INTERNAL_TYPE_16F;
 245                 *bpp = V3D_INTERNAL_BPP_64;
 246                 break;
 247
 248         case V3D_OUTPUT_IMAGE_FORMAT_RG16F:
 249         case V3D_OUTPUT_IMAGE_FORMAT_R16F:
 250                 *type = V3D_INTERNAL_TYPE_16F;
 251                 /* Use 64bpp to make sure the TLB doesn't throw away the alpha
 252                  * channel before alpha test happens.
 253                  */
 254                 *bpp = V3D_INTERNAL_BPP_64;
 255                 break;
 256
 257         case V3D_OUTPUT_IMAGE_FORMAT_RGBA16I:
 258                 *type = V3D_INTERNAL_TYPE_16I;
 259                 *bpp = V3D_INTERNAL_BPP_64;
 260                 break;
 261         case V3D_OUTPUT_IMAGE_FORMAT_RG16I:
 262         case V3D_OUTPUT_IMAGE_FORMAT_R16I:
 263                 *type = V3D_INTERNAL_TYPE_16I;
 264                 *bpp = V3D_INTERNAL_BPP_32;
 265                 break;
 266
 267         case V3D_OUTPUT_IMAGE_FORMAT_RGB10_A2UI:
 268         case V3D_OUTPUT_IMAGE_FORMAT_RGBA16UI:
 269                 *type = V3D_INTERNAL_TYPE_16UI;
 270                 *bpp = V3D_INTERNAL_BPP_64;
 271                 break;
 272         case V3D_OUTPUT_IMAGE_FORMAT_RG16UI:
 273         case V3D_OUTPUT_IMAGE_FORMAT_R16UI:
 274                 *type = V3D_INTERNAL_TYPE_16UI;
 275                 *bpp = V3D_INTERNAL_BPP_32;
 276                 break;
 277
 278         case V3D_OUTPUT_IMAGE_FORMAT_RGBA32I:
 279                 *type = V3D_INTERNAL_TYPE_32I;
 280                 *bpp = V3D_INTERNAL_BPP_128;
 281                 break;
 282         case V3D_OUTPUT_IMAGE_FORMAT_RG32I:
 283                 *type = V3D_INTERNAL_TYPE_32I;
 284                 *bpp = V3D_INTERNAL_BPP_64;
 285                 break;
 286         case V3D_OUTPUT_IMAGE_FORMAT_R32I:
 287                 *type = V3D_INTERNAL_TYPE_32I;
 288                 *bpp = V3D_INTERNAL_BPP_32;
 289                 break;
 290
 291         case V3D_OUTPUT_IMAGE_FORMAT_RGBA32UI:
 292                 *type = V3D_INTERNAL_TYPE_32UI;
 293                 *bpp = V3D_INTERNAL_BPP_128;
 294                 break;
 295         case V3D_OUTPUT_IMAGE_FORMAT_RG32UI:
 296                 *type = V3D_INTERNAL_TYPE_32UI;
 297                 *bpp = V3D_INTERNAL_BPP_64;
 298                 break;
 299         case V3D_OUTPUT_IMAGE_FORMAT_R32UI:
 300                 *type = V3D_INTERNAL_TYPE_32UI;
 301                 *bpp = V3D_INTERNAL_BPP_32;
 302                 break;
 303
 304         case V3D_OUTPUT_IMAGE_FORMAT_RGBA32F:
 305                 *type = V3D_INTERNAL_TYPE_32F;
 306                 *bpp = V3D_INTERNAL_BPP_128;
 307                 break;
 308         case V3D_OUTPUT_IMAGE_FORMAT_RG32F:
 309                 *type = V3D_INTERNAL_TYPE_32F;
 310                 *bpp = V3D_INTERNAL_BPP_64;
 311                 break;
 312         case V3D_OUTPUT_IMAGE_FORMAT_R32F:
 313                 *type = V3D_INTERNAL_TYPE_32F;
 314                 *bpp = V3D_INTERNAL_BPP_32;
 315                 break;
 316
 317         default:
 318                 /* Provide some default values, as we'll be called at RB
 319                  * creation time, even if an RB with this format isn't
 320                  * supported.
 321                  */
 322                 *type = V3D_INTERNAL_TYPE_8;
 323                 *bpp = V3D_INTERNAL_BPP_32;
 324                 break;
 325         }
 326 }
 327
 328 bool
 329 v3dX(tfu_supports_tex_format)(enum V3DX(Texture_Data_Formats) format)
 330 {
 331         switch (format) {
 332         case TEXTURE_DATA_FORMAT_R8:
 333         case TEXTURE_DATA_FORMAT_R8_SNORM:
 334         case TEXTURE_DATA_FORMAT_RG8:
 335         case TEXTURE_DATA_FORMAT_RG8_SNORM:
 336         case TEXTURE_DATA_FORMAT_RGBA8:
 337         case TEXTURE_DATA_FORMAT_RGBA8_SNORM:
 338         case TEXTURE_DATA_FORMAT_RGB565:
 339         case TEXTURE_DATA_FORMAT_RGBA4:
 340         case TEXTURE_DATA_FORMAT_RGB5_A1:
 341         case TEXTURE_DATA_FORMAT_RGB10_A2:
 342         case TEXTURE_DATA_FORMAT_R16:
 343         case TEXTURE_DATA_FORMAT_R16_SNORM:
 344         case TEXTURE_DATA_FORMAT_RG16:
 345         case TEXTURE_DATA_FORMAT_RG16_SNORM:
 346         case TEXTURE_DATA_FORMAT_RGBA16:
 347         case TEXTURE_DATA_FORMAT_RGBA16_SNORM:
 348         case TEXTURE_DATA_FORMAT_R16F:
 349         case TEXTURE_DATA_FORMAT_RG16F:
 350         case TEXTURE_DATA_FORMAT_RGBA16F:
 351         case TEXTURE_DATA_FORMAT_R11F_G11F_B10F:
 352         case TEXTURE_DATA_FORMAT_R4:
 353                 return true;
 354         default:
 355                 return false;
 356         }
 357 }