src/intel/isl/isl_format.c

   1 /*
   2  * Copyright 2015 Intel Corporation
   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 <assert.h>
  25
  26 #include "isl.h"
  27 #include "common/gen_device_info.h"
  28
  29 struct surface_format_info {
  30    bool exists;
  31    uint8_t sampling;
  32    uint8_t filtering;
  33    uint8_t shadow_compare;
  34    uint8_t chroma_key;
  35    uint8_t render_target;
  36    uint8_t alpha_blend;
  37    uint8_t input_vb;
  38    uint8_t streamed_output_vb;
  39    uint8_t color_processing;
  40    uint8_t typed_write;
  41    uint8_t typed_read;
  42    uint8_t ccs_e;
  43 };
  44
  45 /* This macro allows us to write the table almost as it appears in the PRM,
  46  * while restructuring it to turn it into the C code we want.
  47  */
  48 #define SF(sampl, filt, shad, ck, rt, ab, vb, so, color, tw, tr, ccs_e, sf) \
  49    [ISL_FORMAT_##sf] = { true, sampl, filt, shad, ck, rt, ab, vb, so, color, tw, tr, ccs_e},
  50
  51 #define Y 0
  52 #define x 255
  53 /**
  54  * This is the table of support for surface (texture, renderbuffer, and vertex
  55  * buffer, but not depthbuffer) formats across the various hardware generations.
  56  *
  57  * The table is formatted to match the documentation, except that the docs have
  58  * this ridiculous mapping of Y[*+~^#&] for "supported on DevWhatever".  To put
  59  * it in our table, here's the mapping:
  60  *
  61  * Y*: 45
  62  * Y+: 45 (g45/gm45)
  63  * Y~: 50 (gen5)
  64  * Y^: 60 (gen6)
  65  * Y#: 70 (gen7)
  66  *
  67  * The abbreviations in the header below are:
  68  * smpl  - Sampling Engine
  69  * filt  - Sampling Engine Filtering
  70  * shad  - Sampling Engine Shadow Map
  71  * CK    - Sampling Engine Chroma Key
  72  * RT    - Render Target
  73  * AB    - Alpha Blend Render Target
  74  * VB    - Input Vertex Buffer
  75  * SO    - Steamed Output Vertex Buffers (transform feedback)
  76  * color - Color Processing
  77  * ccs_e - Lossless Compression Support (gen9+ only)
  78  * sf    - Surface Format
  79  *
  80  * See page 88 of the Sandybridge PRM VOL4_Part1 PDF.
  81  *
  82  * As of Ivybridge, the columns are no longer in that table and the
  83  * information can be found spread across:
  84  *
  85  * - VOL2_Part1 section 2.5.11 Format Conversion (vertex fetch).
  86  * - VOL4_Part1 section 2.12.2.1.2 Sampler Output Channel Mapping.
  87  * - VOL4_Part1 section 3.9.11 Render Target Write.
  88  * - Render Target Surface Types [SKL+]
  89  */
  90 static const struct surface_format_info format_info[] = {
  91 /* smpl filt shad CK  RT  AB  VB  SO  color TW  TR  ccs_e */
  92    SF( Y, 50,  x,  x,  Y,  Y,  Y,  Y,  x,   70, 90, 90,   R32G32B32A32_FLOAT)
  93    SF( Y,  x,  x,  x,  Y,  x,  Y,  Y,  x,   70, 90, 90,   R32G32B32A32_SINT)
  94    SF( Y,  x,  x,  x,  Y,  x,  Y,  Y,  x,   70, 90, 90,   R32G32B32A32_UINT)
  95    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32G32B32A32_UNORM)
  96    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32G32B32A32_SNORM)
  97    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R64G64_FLOAT)
  98    SF( Y, 50,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   R32G32B32X32_FLOAT)
  99    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32G32B32A32_SSCALED)
 100    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32G32B32A32_USCALED)
 101    SF( x,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   R32G32B32A32_SFIXED)
 102    SF( x,  x,  x,  x,  x,  x, 80,  x,  x,    x,  x,  x,   R64G64_PASSTHRU)
 103    SF( Y, 50,  x,  x,  x,  x,  Y,  Y,  x,    x,  x,  x,   R32G32B32_FLOAT)
 104    SF( Y,  x,  x,  x,  x,  x,  Y,  Y,  x,    x,  x,  x,   R32G32B32_SINT)
 105    SF( Y,  x,  x,  x,  x,  x,  Y,  Y,  x,    x,  x,  x,   R32G32B32_UINT)
 106    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32G32B32_UNORM)
 107    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32G32B32_SNORM)
 108    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32G32B32_SSCALED)
 109    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32G32B32_USCALED)
 110    SF( x,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   R32G32B32_SFIXED)
 111    SF( Y,  Y,  x,  x,  Y, 45,  Y,  x, 60,   70,  x, 90,   R16G16B16A16_UNORM)
 112    SF( Y,  Y,  x,  x,  Y, 60,  Y,  x,  x,   70,  x, 90,   R16G16B16A16_SNORM)
 113    SF( Y,  x,  x,  x,  Y,  x,  Y,  x,  x,   70, 90, 90,   R16G16B16A16_SINT)
 114    SF( Y,  x,  x,  x,  Y,  x,  Y,  x,  x,   70, 75, 90,   R16G16B16A16_UINT)
 115    SF( Y,  Y,  x,  x,  Y,  Y,  Y,  x,  x,   70, 90, 90,   R16G16B16A16_FLOAT)
 116    SF( Y, 50,  x,  x,  Y,  Y,  Y,  Y,  x,   70, 90, 90,   R32G32_FLOAT)
 117    SF( Y, 70,  x,  x,  Y,  Y,  Y,  Y,  x,    x,  x,  x,   R32G32_FLOAT_LD)
 118    SF( Y,  x,  x,  x,  Y,  x,  Y,  Y,  x,   70, 90, 90,   R32G32_SINT)
 119    SF( Y,  x,  x,  x,  Y,  x,  Y,  Y,  x,   70, 90, 90,   R32G32_UINT)
 120    SF( Y, 50,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   R32_FLOAT_X8X24_TYPELESS)
 121    SF( Y,  x,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   X32_TYPELESS_G8X24_UINT)
 122    SF( Y, 50,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L32A32_FLOAT)
 123    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32G32_UNORM)
 124    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32G32_SNORM)
 125    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R64_FLOAT)
 126    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   R16G16B16X16_UNORM)
 127    SF( Y,  Y,  x,  x, 90, 90,  x,  x,  x,    x,  x, 90,   R16G16B16X16_FLOAT)
 128    SF( Y, 50,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   A32X32_FLOAT)
 129    SF( Y, 50,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L32X32_FLOAT)
 130    SF( Y, 50,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   I32X32_FLOAT)
 131    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R16G16B16A16_SSCALED)
 132    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R16G16B16A16_USCALED)
 133    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32G32_SSCALED)
 134    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32G32_USCALED)
 135    SF( x,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   R32G32_SFIXED)
 136    SF( x,  x,  x,  x,  x,  x, 80,  x,  x,    x,  x,  x,   R64_PASSTHRU)
 137    SF( Y,  Y,  x,  Y,  Y,  Y,  Y,  x, 60,   70,  x, 90,   B8G8R8A8_UNORM)
 138    SF( Y,  Y,  x,  x,  Y,  Y,  x,  x,  x,    x,  x,  x,   B8G8R8A8_UNORM_SRGB)
 139 /* smpl filt shad CK  RT  AB  VB  SO  color TW  TR  ccs_e */
 140    SF( Y,  Y,  x,  x,  Y,  Y,  Y,  x, 60,   70,  x,  x,   R10G10B10A2_UNORM)
 141    SF( Y,  Y,  x,  x,  x,  x,  x,  x, 60,    x,  x,  x,   R10G10B10A2_UNORM_SRGB)
 142    SF( Y,  x,  x,  x,  Y,  x,  Y,  x,  x,   70,  x,  x,   R10G10B10A2_UINT)
 143    SF( Y,  Y,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R10G10B10_SNORM_A2_UNORM)
 144    SF( Y,  Y,  x,  x,  Y,  Y,  Y,  x, 60,   70,  x, 90,   R8G8B8A8_UNORM)
 145    SF( Y,  Y,  x,  x,  Y,  Y,  x,  x, 60,    x,  x,  x,   R8G8B8A8_UNORM_SRGB)
 146    SF( Y,  Y,  x,  x,  Y, 60,  Y,  x,  x,   70,  x, 90,   R8G8B8A8_SNORM)
 147    SF( Y,  x,  x,  x,  Y,  x,  Y,  x,  x,   70, 90, 90,   R8G8B8A8_SINT)
 148    SF( Y,  x,  x,  x,  Y,  x,  Y,  x,  x,   70, 75, 90,   R8G8B8A8_UINT)
 149    SF( Y,  Y,  x,  x,  Y, 45,  Y,  x,  x,   70,  x, 90,   R16G16_UNORM)
 150    SF( Y,  Y,  x,  x,  Y, 60,  Y,  x,  x,   70,  x, 90,   R16G16_SNORM)
 151    SF( Y,  x,  x,  x,  Y,  x,  Y,  x,  x,   70, 90, 90,   R16G16_SINT)
 152    SF( Y,  x,  x,  x,  Y,  x,  Y,  x,  x,   70, 75, 90,   R16G16_UINT)
 153    SF( Y,  Y,  x,  x,  Y,  Y,  Y,  x,  x,   70, 90, 90,   R16G16_FLOAT)
 154    SF( Y,  Y,  x,  x,  Y,  Y, 75,  x, 60,   70,  x,  x,   B10G10R10A2_UNORM)
 155    SF( Y,  Y,  x,  x,  Y,  Y,  x,  x, 60,    x,  x,  x,   B10G10R10A2_UNORM_SRGB)
 156    SF( Y,  Y,  x,  x,  Y,  Y,  Y,  x,  x,   70,  x,  x,   R11G11B10_FLOAT)
 157    SF( Y,  x,  x,  x,  Y,  x,  Y,  Y,  x,   70, 70, 90,   R32_SINT)
 158    SF( Y,  x,  x,  x,  Y,  x,  Y,  Y,  x,   70, 70, 90,   R32_UINT)
 159    SF( Y, 50,  Y,  x,  Y,  Y,  Y,  Y,  x,   70, 70, 90,   R32_FLOAT)
 160    SF( Y, 50,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   R24_UNORM_X8_TYPELESS)
 161    SF( Y,  x,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   X24_TYPELESS_G8_UINT)
 162    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L16A16_UNORM)
 163    SF( Y, 50,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   I24X8_UNORM)
 164    SF( Y, 50,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L24X8_UNORM)
 165    SF( Y, 50,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   A24X8_UNORM)
 166    SF( Y, 50,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   I32_FLOAT)
 167    SF( Y, 50,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L32_FLOAT)
 168    SF( Y, 50,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   A32_FLOAT)
 169    SF( Y,  Y,  x,  Y, 80, 80,  x,  x, 60,    x,  x, 90,   B8G8R8X8_UNORM)
 170    SF( Y,  Y,  x,  x, 80, 80,  x,  x,  x,    x,  x,  x,   B8G8R8X8_UNORM_SRGB)
 171    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   R8G8B8X8_UNORM)
 172    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   R8G8B8X8_UNORM_SRGB)
 173    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   R9G9B9E5_SHAREDEXP)
 174    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   B10G10R10X2_UNORM)
 175    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L16A16_FLOAT)
 176    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32_UNORM)
 177    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32_SNORM)
 178 /* smpl filt shad CK  RT  AB  VB  SO  color TW  TR  ccs_e */
 179    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R10G10B10X2_USCALED)
 180    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R8G8B8A8_SSCALED)
 181    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R8G8B8A8_USCALED)
 182    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R16G16_SSCALED)
 183    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R16G16_USCALED)
 184    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32_SSCALED)
 185    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R32_USCALED)
 186    SF( Y,  Y,  x,  Y,  Y,  Y,  x,  x,  x,   70,  x,  x,   B5G6R5_UNORM)
 187    SF( Y,  Y,  x,  x,  Y,  Y,  x,  x,  x,    x,  x,  x,   B5G6R5_UNORM_SRGB)
 188    SF( Y,  Y,  x,  Y,  Y,  Y,  x,  x,  x,   70,  x,  x,   B5G5R5A1_UNORM)
 189    SF( Y,  Y,  x,  x,  Y,  Y,  x,  x,  x,    x,  x,  x,   B5G5R5A1_UNORM_SRGB)
 190    SF( Y,  Y,  x,  Y,  Y,  Y,  x,  x,  x,   70,  x,  x,   B4G4R4A4_UNORM)
 191    SF( Y,  Y,  x,  x,  Y,  Y,  x,  x,  x,    x,  x,  x,   B4G4R4A4_UNORM_SRGB)
 192    SF( Y,  Y,  x,  x,  Y,  Y,  Y,  x,  x,   70,  x,  x,   R8G8_UNORM)
 193    SF( Y,  Y,  x,  Y,  Y, 60,  Y,  x,  x,   70,  x,  x,   R8G8_SNORM)
 194    SF( Y,  x,  x,  x,  Y,  x,  Y,  x,  x,   70, 90,  x,   R8G8_SINT)
 195    SF( Y,  x,  x,  x,  Y,  x,  Y,  x,  x,   70, 75,  x,   R8G8_UINT)
 196    SF( Y,  Y,  Y,  x,  Y, 45,  Y,  x, 70,   70,  x,  x,   R16_UNORM)
 197    SF( Y,  Y,  x,  x,  Y, 60,  Y,  x,  x,   70,  x,  x,   R16_SNORM)
 198    SF( Y,  x,  x,  x,  Y,  x,  Y,  x,  x,   70, 90,  x,   R16_SINT)
 199    SF( Y,  x,  x,  x,  Y,  x,  Y,  x,  x,   70, 75,  x,   R16_UINT)
 200    SF( Y,  Y,  x,  x,  Y,  Y,  Y,  x,  x,   70, 90,  x,   R16_FLOAT)
 201    SF(50, 50,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   A8P8_UNORM_PALETTE0)
 202    SF(50, 50,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   A8P8_UNORM_PALETTE1)
 203    SF( Y,  Y,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   I16_UNORM)
 204    SF( Y,  Y,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L16_UNORM)
 205    SF( Y,  Y,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   A16_UNORM)
 206    SF( Y,  Y,  x,  Y,  x,  x,  x,  x,  x,    x,  x,  x,   L8A8_UNORM)
 207    SF( Y,  Y,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   I16_FLOAT)
 208    SF( Y,  Y,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L16_FLOAT)
 209    SF( Y,  Y,  Y,  x,  x,  x,  x,  x,  x,    x,  x,  x,   A16_FLOAT)
 210    SF(45, 45,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L8A8_UNORM_SRGB)
 211    SF( Y,  Y,  x,  Y,  x,  x,  x,  x,  x,    x,  x,  x,   R5G5_SNORM_B6_UNORM)
 212    SF( x,  x,  x,  x,  Y,  Y,  x,  x,  x,   70,  x,  x,   B5G5R5X1_UNORM)
 213    SF( x,  x,  x,  x,  Y,  Y,  x,  x,  x,    x,  x,  x,   B5G5R5X1_UNORM_SRGB)
 214    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R8G8_SSCALED)
 215    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R8G8_USCALED)
 216 /* smpl filt shad CK  RT  AB  VB  SO  color TW  TR  ccs_e */
 217    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R16_SSCALED)
 218    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R16_USCALED)
 219    SF(50, 50,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   P8A8_UNORM_PALETTE0)
 220    SF(50, 50,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   P8A8_UNORM_PALETTE1)
 221    SF( x,  x,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   A1B5G5R5_UNORM)
 222    /* According to the PRM, A4B4G4R4_UNORM isn't supported until Sky Lake
 223     * but empirical testing indicates that at least sampling works just fine
 224     * on Broadwell.
 225     */
 226    SF(80, 80,  x,  x, 90,  x,  x,  x,  x,    x,  x,  x,   A4B4G4R4_UNORM)
 227    SF(90,  x,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L8A8_UINT)
 228    SF(90,  x,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L8A8_SINT)
 229    SF( Y,  Y,  x, 45,  Y,  Y,  Y,  x,  x,   70,  x,  x,   R8_UNORM)
 230    SF( Y,  Y,  x,  x,  Y, 60,  Y,  x,  x,   70,  x,  x,   R8_SNORM)
 231    SF( Y,  x,  x,  x,  Y,  x,  Y,  x,  x,   70, 90,  x,   R8_SINT)
 232    SF( Y,  x,  x,  x,  Y,  x,  Y,  x,  x,   70, 75,  x,   R8_UINT)
 233    SF( Y,  Y,  x,  Y,  Y,  Y,  x,  x,  x,   70,  x,  x,   A8_UNORM)
 234    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   I8_UNORM)
 235    SF( Y,  Y,  x,  Y,  x,  x,  x,  x,  x,    x,  x,  x,   L8_UNORM)
 236    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   P4A4_UNORM_PALETTE0)
 237    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   A4P4_UNORM_PALETTE0)
 238    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R8_SSCALED)
 239    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R8_USCALED)
 240    SF(45, 45,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   P8_UNORM_PALETTE0)
 241    SF(45, 45,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L8_UNORM_SRGB)
 242    SF(45, 45,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   P8_UNORM_PALETTE1)
 243    SF(45, 45,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   P4A4_UNORM_PALETTE1)
 244    SF(45, 45,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   A4P4_UNORM_PALETTE1)
 245    SF( x,  x,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   Y8_UNORM)
 246    SF(90,  x,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L8_UINT)
 247    SF(90,  x,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   L8_SINT)
 248    SF(90,  x,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   I8_UINT)
 249    SF(90,  x,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   I8_SINT)
 250    SF(45, 45,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   DXT1_RGB_SRGB)
 251    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   R1_UNORM)
 252    SF( Y,  Y,  x,  Y,  Y,  x,  x,  x, 60,    x,  x,  x,   YCRCB_NORMAL)
 253    SF( Y,  Y,  x,  Y,  Y,  x,  x,  x, 60,    x,  x,  x,   YCRCB_SWAPUVY)
 254    SF(45, 45,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   P2_UNORM_PALETTE0)
 255    SF(45, 45,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   P2_UNORM_PALETTE1)
 256    SF( Y,  Y,  x,  Y,  x,  x,  x,  x,  x,    x,  x,  x,   BC1_UNORM)
 257    SF( Y,  Y,  x,  Y,  x,  x,  x,  x,  x,    x,  x,  x,   BC2_UNORM)
 258    SF( Y,  Y,  x,  Y,  x,  x,  x,  x,  x,    x,  x,  x,   BC3_UNORM)
 259    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   BC4_UNORM)
 260    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   BC5_UNORM)
 261    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   BC1_UNORM_SRGB)
 262    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   BC2_UNORM_SRGB)
 263    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   BC3_UNORM_SRGB)
 264    SF( Y,  x,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   MONO8)
 265    SF( Y,  Y,  x,  x,  Y,  x,  x,  x, 60,    x,  x,  x,   YCRCB_SWAPUV)
 266    SF( Y,  Y,  x,  x,  Y,  x,  x,  x, 60,    x,  x,  x,   YCRCB_SWAPY)
 267    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   DXT1_RGB)
 268 /* smpl filt shad CK  RT  AB  VB  SO  color TW  TR  ccs_e */
 269    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   FXT1)
 270    SF(75, 75,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R8G8B8_UNORM)
 271    SF(75, 75,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R8G8B8_SNORM)
 272    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R8G8B8_SSCALED)
 273    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R8G8B8_USCALED)
 274    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R64G64B64A64_FLOAT)
 275    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R64G64B64_FLOAT)
 276    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   BC4_SNORM)
 277    SF( Y,  Y,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   BC5_SNORM)
 278    SF(50, 50,  x,  x,  x,  x, 60,  x,  x,    x,  x,  x,   R16G16B16_FLOAT)
 279    SF(75, 75,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R16G16B16_UNORM)
 280    SF(75, 75,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R16G16B16_SNORM)
 281    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R16G16B16_SSCALED)
 282    SF( x,  x,  x,  x,  x,  x,  Y,  x,  x,    x,  x,  x,   R16G16B16_USCALED)
 283    SF(70, 70,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   BC6H_SF16)
 284    SF(70, 70,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   BC7_UNORM)
 285    SF(70, 70,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   BC7_UNORM_SRGB)
 286    SF(70, 70,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   BC6H_UF16)
 287    SF( x,  x,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   PLANAR_420_8)
 288    SF(75, 75,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   R8G8B8_UNORM_SRGB)
 289    SF(80, 80,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ETC1_RGB8)
 290    SF(80, 80,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ETC2_RGB8)
 291    SF(80, 80,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   EAC_R11)
 292    SF(80, 80,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   EAC_RG11)
 293    SF(80, 80,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   EAC_SIGNED_R11)
 294    SF(80, 80,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   EAC_SIGNED_RG11)
 295    SF(80, 80,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ETC2_SRGB8)
 296    SF(90,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   R16G16B16_UINT)
 297    SF(90,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   R16G16B16_SINT)
 298    SF( x,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   R32_SFIXED)
 299    SF( x,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   R10G10B10A2_SNORM)
 300    SF( x,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   R10G10B10A2_USCALED)
 301    SF( x,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   R10G10B10A2_SSCALED)
 302    SF( x,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   R10G10B10A2_SINT)
 303    SF( x,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   B10G10R10A2_SNORM)
 304    SF( x,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   B10G10R10A2_USCALED)
 305    SF( x,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   B10G10R10A2_SSCALED)
 306    SF( x,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   B10G10R10A2_UINT)
 307    SF( x,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   B10G10R10A2_SINT)
 308    SF( x,  x,  x,  x,  x,  x, 80,  x,  x,    x,  x,  x,   R64G64B64A64_PASSTHRU)
 309    SF( x,  x,  x,  x,  x,  x, 80,  x,  x,    x,  x,  x,   R64G64B64_PASSTHRU)
 310    SF(80, 80,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ETC2_RGB8_PTA)
 311    SF(80, 80,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ETC2_SRGB8_PTA)
 312    SF(80, 80,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ETC2_EAC_RGBA8)
 313    SF(80, 80,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ETC2_EAC_SRGB8_A8)
 314    SF(90,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   R8G8B8_UINT)
 315    SF(90,  x,  x,  x,  x,  x, 75,  x,  x,    x,  x,  x,   R8G8B8_SINT)
 316    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_4X4_FLT16)
 317    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_5X4_FLT16)
 318    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_5X5_FLT16)
 319    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_6X5_FLT16)
 320    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_6X6_FLT16)
 321    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_8X5_FLT16)
 322    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_8X6_FLT16)
 323    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_8X8_FLT16)
 324    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_10X5_FLT16)
 325    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_10X6_FLT16)
 326    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_10X8_FLT16)
 327    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_10X10_FLT16)
 328    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_12X10_FLT16)
 329    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_12X12_FLT16)
 330    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_4X4_U8SRGB)
 331    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_5X4_U8SRGB)
 332    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_5X5_U8SRGB)
 333    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_6X5_U8SRGB)
 334    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_6X6_U8SRGB)
 335    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_8X5_U8SRGB)
 336    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_8X6_U8SRGB)
 337    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_8X8_U8SRGB)
 338    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_10X5_U8SRGB)
 339    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_10X6_U8SRGB)
 340    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_10X8_U8SRGB)
 341    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_10X10_U8SRGB)
 342    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_12X10_U8SRGB)
 343    SF(90, 90,  x,  x,  x,  x,  x,  x,  x,    x,  x,  x,   ASTC_LDR_2D_12X12_U8SRGB)
 344 };
 345 #undef x
 346 #undef Y
 347
 348 static unsigned
 349 format_gen(const struct gen_device_info *devinfo)
 350 {
 351    return devinfo->gen * 10 + (devinfo->is_g4x || devinfo->is_haswell) * 5;
 352 }
 353
 354 bool
 355 isl_format_supports_rendering(const struct gen_device_info *devinfo,
 356                               enum isl_format format)
 357 {
 358    if (!format_info[format].exists)
 359       return false;
 360
 361    return format_gen(devinfo) >= format_info[format].render_target;
 362 }
 363
 364 bool
 365 isl_format_supports_alpha_blending(const struct gen_device_info *devinfo,
 366                                    enum isl_format format)
 367 {
 368    if (!format_info[format].exists)
 369       return false;
 370
 371    return format_gen(devinfo) >= format_info[format].alpha_blend;
 372 }
 373
 374 bool
 375 isl_format_supports_sampling(const struct gen_device_info *devinfo,
 376                              enum isl_format format)
 377 {
 378    if (!format_info[format].exists)
 379       return false;
 380
 381    if (devinfo->is_baytrail) {
 382       const struct isl_format_layout *fmtl = isl_format_get_layout(format);
 383       /* Support for ETC1 and ETC2 exists on Bay Trail even though big-core
 384        * GPUs didn't get it until Broadwell.
 385        */
 386       if (fmtl->txc == ISL_TXC_ETC1 || fmtl->txc == ISL_TXC_ETC2)
 387          return true;
 388    } else if (devinfo->is_cherryview) {
 389       const struct isl_format_layout *fmtl = isl_format_get_layout(format);
 390       /* Support for ASTC exists on Cherry View even though big-core
 391        * GPUs didn't get it until Skylake.
 392        */
 393       if (fmtl->txc == ISL_TXC_ASTC)
 394          return true;
 395    }
 396
 397    return format_gen(devinfo) >= format_info[format].sampling;
 398 }
 399
 400 bool
 401 isl_format_supports_filtering(const struct gen_device_info *devinfo,
 402                               enum isl_format format)
 403 {
 404    if (!format_info[format].exists)
 405       return false;
 406
 407    if (devinfo->is_baytrail) {
 408       const struct isl_format_layout *fmtl = isl_format_get_layout(format);
 409       /* Support for ETC1 and ETC2 exists on Bay Trail even though big-core
 410        * GPUs didn't get it until Broadwell.
 411        */
 412       if (fmtl->txc == ISL_TXC_ETC1 || fmtl->txc == ISL_TXC_ETC2)
 413          return true;
 414    } else if (devinfo->is_cherryview) {
 415       const struct isl_format_layout *fmtl = isl_format_get_layout(format);
 416       /* Support for ASTC exists on Cherry View even though big-core
 417        * GPUs didn't get it until Skylake.
 418        */
 419       if (fmtl->txc == ISL_TXC_ASTC)
 420          return true;
 421    }
 422
 423    return format_gen(devinfo) >= format_info[format].filtering;
 424 }
 425
 426 bool
 427 isl_format_supports_vertex_fetch(const struct gen_device_info *devinfo,
 428                                  enum isl_format format)
 429 {
 430    if (!format_info[format].exists)
 431       return false;
 432
 433    /* For vertex fetch, Bay Trail supports the same set of formats as Haswell
 434     * but is a superset of Ivy Bridge.
 435     */
 436    if (devinfo->is_baytrail)
 437       return 75 >= format_info[format].input_vb;
 438
 439    return format_gen(devinfo) >= format_info[format].input_vb;
 440 }
 441
 442 /**
 443  * Returns true if the given format can support typed writes.
 444  */
 445 bool
 446 isl_format_supports_typed_writes(const struct gen_device_info *devinfo,
 447                                  enum isl_format format)
 448 {
 449    if (!format_info[format].exists)
 450       return false;
 451
 452    return format_gen(devinfo) >= format_info[format].typed_write;
 453 }
 454
 455
 456 /**
 457  * Returns true if the given format can support typed reads with format
 458  * conversion fully handled by hardware.  On Sky Lake, all formats which are
 459  * supported for typed writes also support typed reads but some of them return
 460  * the raw image data and don't provide format conversion.
 461  *
 462  * For anyone looking to find this data in the PRM, the easiest way to find
 463  * format tables is to search for R11G11B10.  There are only a few
 464  * occurrences.
 465  */
 466 bool
 467 isl_format_supports_typed_reads(const struct gen_device_info *devinfo,
 468                                 enum isl_format format)
 469 {
 470    if (!format_info[format].exists)
 471       return false;
 472
 473    return format_gen(devinfo) >= format_info[format].typed_read;
 474 }
 475
 476 /**
 477  * Returns true if the given format can support single-sample fast clears.
 478  * This function only checks the format.  In order to determine if a surface
 479  * supports CCS_E, several other factors need to be considered such as tiling
 480  * and sample count.  See isl_surf_get_ccs_surf for details.
 481  */
 482 bool
 483 isl_format_supports_ccs_d(const struct gen_device_info *devinfo,
 484                           enum isl_format format)
 485 {
 486    /* Fast clears were first added on Ivy Bridge */
 487    if (devinfo->gen < 7)
 488       return false;
 489
 490    if (!isl_format_supports_rendering(devinfo, format))
 491       return false;
 492
 493    const struct isl_format_layout *fmtl = isl_format_get_layout(format);
 494
 495    return fmtl->bpb == 32 || fmtl->bpb == 64 || fmtl->bpb == 128;
 496 }
 497
 498 /**
 499  * Returns true if the given format can support single-sample color
 500  * compression.  This function only checks the format.  In order to determine
 501  * if a surface supports CCS_E, several other factors need to be considered
 502  * such as tiling and sample count.  See isl_surf_get_ccs_surf for details.
 503  */
 504 bool
 505 isl_format_supports_ccs_e(const struct gen_device_info *devinfo,
 506                           enum isl_format format)
 507 {
 508    if (!format_info[format].exists)
 509       return false;
 510
 511    return format_gen(devinfo) >= format_info[format].ccs_e;
 512 }
 513
 514 bool
 515 isl_format_supports_multisampling(const struct gen_device_info *devinfo,
 516                                   enum isl_format format)
 517 {
 518    /* From the Sandybridge PRM, Volume 4 Part 1 p72, SURFACE_STATE, Surface
 519     * Format:
 520     *
 521     *    If Number of Multisamples is set to a value other than
 522     *    MULTISAMPLECOUNT_1, this field cannot be set to the following
 523     *    formats:
 524     *
 525     *       - any format with greater than 64 bits per element
 526     *       - any compressed texture format (BC*)
 527     *       - any YCRCB* format
 528     *
 529     * The restriction on the format's size is removed on Broadwell.  Also,
 530     * there is an exception for HiZ which we treat as a compressed format and
 531     * is allowed to be multisampled on Broadwell and earlier.
 532     */
 533    if (format == ISL_FORMAT_HIZ) {
 534       /* On SKL+, HiZ is always single-sampled even when the primary surface
 535        * is multisampled.  See also isl_surf_get_hiz_surf().
 536        */
 537       return devinfo->gen <= 8;
 538    } else if (devinfo->gen < 8 && isl_format_get_layout(format)->bpb > 64) {
 539       return false;
 540    } else if (isl_format_is_compressed(format)) {
 541       return false;
 542    } else if (isl_format_is_yuv(format)) {
 543       return false;
 544    } else {
 545       return true;
 546    }
 547 }
 548
 549 /**
 550  * Returns true if the two formats are "CCS_E compatible" meaning that you can
 551  * render in one format with CCS_E enabled and then texture using the other
 552  * format without needing a resolve.
 553  *
 554  * Note: Even if the formats are compatible, special care must be taken if a
 555  * clear color is involved because the encoding of the clear color is heavily
 556  * format-dependent.
 557  */
 558 bool
 559 isl_formats_are_ccs_e_compatible(const struct gen_device_info *devinfo,
 560                                  enum isl_format format1,
 561                                  enum isl_format format2)
 562 {
 563    /* They must support CCS_E */
 564    if (!isl_format_supports_ccs_e(devinfo, format1) ||
 565        !isl_format_supports_ccs_e(devinfo, format2))
 566       return false;
 567
 568    const struct isl_format_layout *fmtl1 = isl_format_get_layout(format1);
 569    const struct isl_format_layout *fmtl2 = isl_format_get_layout(format2);
 570
 571    /* The compression used by CCS is not dependent on the actual data encoding
 572     * of the format but only depends on the bit-layout of the channels.
 573     */
 574    return fmtl1->channels.r.bits == fmtl2->channels.r.bits &&
 575           fmtl1->channels.g.bits == fmtl2->channels.g.bits &&
 576           fmtl1->channels.b.bits == fmtl2->channels.b.bits &&
 577           fmtl1->channels.a.bits == fmtl2->channels.a.bits;
 578 }
 579
 580 static inline bool
 581 isl_format_has_channel_type(enum isl_format fmt, enum isl_base_type type)
 582 {
 583    const struct isl_format_layout *fmtl = isl_format_get_layout(fmt);
 584
 585    return fmtl->channels.r.type == type ||
 586           fmtl->channels.g.type == type ||
 587           fmtl->channels.b.type == type ||
 588           fmtl->channels.a.type == type ||
 589           fmtl->channels.l.type == type ||
 590           fmtl->channels.i.type == type ||
 591           fmtl->channels.p.type == type;
 592 }
 593
 594 bool
 595 isl_format_has_unorm_channel(enum isl_format fmt)
 596 {
 597    return isl_format_has_channel_type(fmt, ISL_UNORM);
 598 }
 599
 600 bool
 601 isl_format_has_snorm_channel(enum isl_format fmt)
 602 {
 603    return isl_format_has_channel_type(fmt, ISL_SNORM);
 604 }
 605
 606 bool
 607 isl_format_has_ufloat_channel(enum isl_format fmt)
 608 {
 609    return isl_format_has_channel_type(fmt, ISL_UFLOAT);
 610 }
 611
 612 bool
 613 isl_format_has_sfloat_channel(enum isl_format fmt)
 614 {
 615    return isl_format_has_channel_type(fmt, ISL_SFLOAT);
 616 }
 617
 618 bool
 619 isl_format_has_uint_channel(enum isl_format fmt)
 620 {
 621    return isl_format_has_channel_type(fmt, ISL_UINT);
 622 }
 623
 624 bool
 625 isl_format_has_sint_channel(enum isl_format fmt)
 626 {
 627    return isl_format_has_channel_type(fmt, ISL_SINT);
 628 }
 629
 630 unsigned
 631 isl_format_get_num_channels(enum isl_format fmt)
 632 {
 633    const struct isl_format_layout *fmtl = isl_format_get_layout(fmt);
 634
 635    assert(fmtl->channels.p.bits == 0);
 636
 637    return (fmtl->channels.r.bits > 0) +
 638           (fmtl->channels.g.bits > 0) +
 639           (fmtl->channels.b.bits > 0) +
 640           (fmtl->channels.a.bits > 0) +
 641           (fmtl->channels.l.bits > 0) +
 642           (fmtl->channels.i.bits > 0);
 643 }
 644
 645 uint32_t
 646 isl_format_get_depth_format(enum isl_format fmt, bool has_stencil)
 647 {
 648    switch (fmt) {
 649    default:
 650       unreachable("bad isl depth format");
 651    case ISL_FORMAT_R32_FLOAT_X8X24_TYPELESS:
 652       assert(has_stencil);
 653       return 0; /* D32_FLOAT_S8X24_UINT */
 654    case ISL_FORMAT_R32_FLOAT:
 655       assert(!has_stencil);
 656       return 1; /* D32_FLOAT */
 657    case ISL_FORMAT_R24_UNORM_X8_TYPELESS:
 658       if (has_stencil) {
 659          return 2; /* D24_UNORM_S8_UINT */
 660       } else {
 661          return 3; /* D24_UNORM_X8_UINT */
 662       }
 663    case ISL_FORMAT_R16_UNORM:
 664       assert(!has_stencil);
 665       return 5; /* D16_UNORM */
 666    }
 667 }
 668
 669 enum isl_format
 670 isl_format_rgb_to_rgba(enum isl_format rgb)
 671 {
 672    assert(isl_format_is_rgb(rgb));
 673
 674    switch (rgb) {
 675    case ISL_FORMAT_R32G32B32_FLOAT:    return ISL_FORMAT_R32G32B32A32_FLOAT;
 676    case ISL_FORMAT_R32G32B32_SINT:     return ISL_FORMAT_R32G32B32A32_SINT;
 677    case ISL_FORMAT_R32G32B32_UINT:     return ISL_FORMAT_R32G32B32A32_UINT;
 678    case ISL_FORMAT_R32G32B32_UNORM:    return ISL_FORMAT_R32G32B32A32_UNORM;
 679    case ISL_FORMAT_R32G32B32_SNORM:    return ISL_FORMAT_R32G32B32A32_SNORM;
 680    case ISL_FORMAT_R32G32B32_SSCALED:  return ISL_FORMAT_R32G32B32A32_SSCALED;
 681    case ISL_FORMAT_R32G32B32_USCALED:  return ISL_FORMAT_R32G32B32A32_USCALED;
 682    case ISL_FORMAT_R32G32B32_SFIXED:   return ISL_FORMAT_R32G32B32A32_SFIXED;
 683    case ISL_FORMAT_R8G8B8_UNORM:       return ISL_FORMAT_R8G8B8A8_UNORM;
 684    case ISL_FORMAT_R8G8B8_SNORM:       return ISL_FORMAT_R8G8B8A8_SNORM;
 685    case ISL_FORMAT_R8G8B8_SSCALED:     return ISL_FORMAT_R8G8B8A8_SSCALED;
 686    case ISL_FORMAT_R8G8B8_USCALED:     return ISL_FORMAT_R8G8B8A8_USCALED;
 687    case ISL_FORMAT_R16G16B16_FLOAT:    return ISL_FORMAT_R16G16B16A16_FLOAT;
 688    case ISL_FORMAT_R16G16B16_UNORM:    return ISL_FORMAT_R16G16B16A16_UNORM;
 689    case ISL_FORMAT_R16G16B16_SNORM:    return ISL_FORMAT_R16G16B16A16_SNORM;
 690    case ISL_FORMAT_R16G16B16_SSCALED:  return ISL_FORMAT_R16G16B16A16_SSCALED;
 691    case ISL_FORMAT_R16G16B16_USCALED:  return ISL_FORMAT_R16G16B16A16_USCALED;
 692    case ISL_FORMAT_R8G8B8_UNORM_SRGB:  return ISL_FORMAT_R8G8B8A8_UNORM_SRGB;
 693    case ISL_FORMAT_R16G16B16_UINT:     return ISL_FORMAT_R16G16B16A16_UINT;
 694    case ISL_FORMAT_R16G16B16_SINT:     return ISL_FORMAT_R16G16B16A16_SINT;
 695    case ISL_FORMAT_R8G8B8_UINT:        return ISL_FORMAT_R8G8B8A8_UINT;
 696    case ISL_FORMAT_R8G8B8_SINT:        return ISL_FORMAT_R8G8B8A8_SINT;
 697    default:
 698       return ISL_FORMAT_UNSUPPORTED;
 699    }
 700 }
 701
 702 enum isl_format
 703 isl_format_rgb_to_rgbx(enum isl_format rgb)
 704 {
 705    assert(isl_format_is_rgb(rgb));
 706
 707    switch (rgb) {
 708    case ISL_FORMAT_R32G32B32_FLOAT:
 709       return ISL_FORMAT_R32G32B32X32_FLOAT;
 710    case ISL_FORMAT_R16G16B16_UNORM:
 711       return ISL_FORMAT_R16G16B16X16_UNORM;
 712    case ISL_FORMAT_R16G16B16_FLOAT:
 713       return ISL_FORMAT_R16G16B16X16_FLOAT;
 714    case ISL_FORMAT_R8G8B8_UNORM:
 715       return ISL_FORMAT_R8G8B8X8_UNORM;
 716    case ISL_FORMAT_R8G8B8_UNORM_SRGB:
 717       return ISL_FORMAT_R8G8B8X8_UNORM_SRGB;
 718    default:
 719       return ISL_FORMAT_UNSUPPORTED;
 720    }
 721 }