src/gallium/drivers/freedreno/a4xx/fd4_format.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2014 Rob Clark <robclark@freedesktop.org>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Authors:
  26  *    Rob Clark <robclark@freedesktop.org>
  27  */
  28
  29 #include "pipe/p_defines.h"
  30 #include "util/u_format.h"
  31
  32 #include "fd4_format.h"
  33
  34
  35 /* Specifies the table of all the formats and their features. Also supplies
  36  * the helpers that look up various data in those tables.
  37  */
  38
  39 struct fd4_format {
  40         enum a4xx_vtx_fmt vtx;
  41         enum a4xx_tex_fmt tex;
  42         enum a4xx_color_fmt rb;
  43         enum a3xx_color_swap swap;
  44         boolean present;
  45 };
  46
  47 #define RB4_NONE ~0
  48
  49 /* vertex + texture */
  50 #define VT(pipe, fmt, rbfmt, swapfmt) \
  51         [PIPE_FORMAT_ ## pipe] = { \
  52                 .present = 1, \
  53                 .vtx = VFMT4_ ## fmt, \
  54                 .tex = TFMT4_ ## fmt, \
  55                 .rb = RB4_ ## rbfmt, \
  56                 .swap = swapfmt \
  57         }
  58
  59 /* texture-only */
  60 #define _T(pipe, fmt, rbfmt, swapfmt) \
  61         [PIPE_FORMAT_ ## pipe] = { \
  62                 .present = 1, \
  63                 .vtx = ~0, \
  64                 .tex = TFMT4_ ## fmt, \
  65                 .rb = RB4_ ## rbfmt, \
  66                 .swap = swapfmt \
  67         }
  68
  69 /* vertex-only */
  70 #define V_(pipe, fmt, rbfmt, swapfmt) \
  71         [PIPE_FORMAT_ ## pipe] = { \
  72                 .present = 1, \
  73                 .vtx = VFMT4_ ## fmt, \
  74                 .tex = ~0, \
  75                 .rb = RB4_ ## rbfmt, \
  76                 .swap = swapfmt \
  77         }
  78
  79 static struct fd4_format formats[PIPE_FORMAT_COUNT] = {
  80         /* 8-bit */
  81         VT(R8_UNORM,   8_UNORM, R8_UNORM, WZYX),
  82         VT(R8_SNORM,   8_SNORM, NONE,     WZYX),
  83         VT(R8_UINT,    8_UINT,  NONE,     WZYX),
  84         VT(R8_SINT,    8_SINT,  NONE,     WZYX),
  85         V_(R8_USCALED, 8_UINT,  NONE,     WZYX),
  86         V_(R8_SSCALED, 8_UINT,  NONE,     WZYX),
  87
  88         _T(A8_UNORM,   8_UNORM, A8_UNORM, WZYX),
  89         _T(L8_UNORM,   8_UNORM, R8_UNORM, WZYX),
  90         _T(I8_UNORM,   8_UNORM, NONE,     WZYX),
  91
  92         _T(A8_UINT,    8_UINT,  NONE,     WZYX),
  93         _T(A8_SINT,    8_SINT,  NONE,     WZYX),
  94         _T(L8_UINT,    8_UINT,  NONE,     WZYX),
  95         _T(L8_SINT,    8_SINT,  NONE,     WZYX),
  96         _T(I8_UINT,    8_UINT,  NONE,     WZYX),
  97         _T(I8_SINT,    8_SINT,  NONE,     WZYX),
  98
  99         _T(S8_UINT,    8_UINT,  R8_UNORM, WZYX),
 100
 101         /* 16-bit */
 102         VT(R16_UNORM,   16_UNORM, R16_UNORM, WZYX),
 103         VT(R16_SNORM,   16_SNORM, R16_SNORM, WZYX),
 104         VT(R16_UINT,    16_UINT,  R16_UINT,  WZYX),
 105         VT(R16_SINT,    16_SINT,  R16_SINT,  WZYX),
 106         V_(R16_USCALED, 16_UINT,  NONE,      WZYX),
 107         V_(R16_SSCALED, 16_UINT,  NONE,      WZYX),
 108         VT(R16_FLOAT,   16_FLOAT, R16_FLOAT, WZYX),
 109
 110         _T(A16_UNORM,   16_UNORM, NONE,      WZYX),
 111         _T(A16_SNORM,   16_SNORM, NONE,      WZYX),
 112         _T(A16_UINT,    16_UINT,  NONE,      WZYX),
 113         _T(A16_SINT,    16_SINT,  NONE,      WZYX),
 114         _T(L16_UNORM,   16_UNORM, NONE,      WZYX),
 115         _T(L16_SNORM,   16_SNORM, NONE,      WZYX),
 116         _T(L16_UINT,    16_UINT,  NONE,      WZYX),
 117         _T(L16_SINT,    16_SINT,  NONE,      WZYX),
 118         _T(I16_UNORM,   16_UNORM, NONE,      WZYX),
 119         _T(I16_SNORM,   16_SNORM, NONE,      WZYX),
 120         _T(I16_UINT,    16_UINT,  NONE,      WZYX),
 121         _T(I16_SINT,    16_SINT,  NONE,      WZYX),
 122
 123         VT(R8G8_UNORM,   8_8_UNORM, R8G8_UNORM, WZYX),
 124         VT(R8G8_SNORM,   8_8_SNORM, R8G8_SNORM, WZYX),
 125         VT(R8G8_UINT,    8_8_UINT,  R8G8_UINT,  WZYX),
 126         VT(R8G8_SINT,    8_8_SINT,  R8G8_SINT,  WZYX),
 127         V_(R8G8_USCALED, 8_8_UINT,  NONE,       WZYX),
 128         V_(R8G8_SSCALED, 8_8_SINT,  NONE,       WZYX),
 129
 130         _T(L8A8_UINT,    8_8_UINT,  NONE,       WZYX),
 131         _T(L8A8_SINT,    8_8_SINT,  NONE,       WZYX),
 132
 133         _T(B5G6R5_UNORM,   5_6_5_UNORM,   R5G6B5_UNORM,   WXYZ),
 134         _T(B5G5R5A1_UNORM, 5_5_5_1_UNORM, R5G5B5A1_UNORM, WXYZ),
 135         _T(B5G5R5X1_UNORM, 5_5_5_1_UNORM, R5G5B5A1_UNORM, WXYZ),
 136         _T(B4G4R4A4_UNORM, 4_4_4_4_UNORM, R4G4B4A4_UNORM, WXYZ),
 137
 138         /* 24-bit */
 139         V_(R8G8B8_UNORM,   8_8_8_UNORM, NONE, WZYX),
 140         V_(R8G8B8_SNORM,   8_8_8_SNORM, NONE, WZYX),
 141         V_(R8G8B8_UINT,    8_8_8_UINT,  NONE, WZYX),
 142         V_(R8G8B8_SINT,    8_8_8_SINT,  NONE, WZYX),
 143         V_(R8G8B8_USCALED, 8_8_8_UINT,  NONE, WZYX),
 144         V_(R8G8B8_SSCALED, 8_8_8_SINT,  NONE, WZYX),
 145
 146         /* 32-bit */
 147         VT(R32_UINT,    32_UINT,  R32_UINT, WZYX),
 148         VT(R32_SINT,    32_SINT,  R32_SINT, WZYX),
 149         V_(R32_USCALED, 32_UINT,  NONE,     WZYX),
 150         V_(R32_SSCALED, 32_UINT,  NONE,     WZYX),
 151         VT(R32_FLOAT,   32_FLOAT, R32_FLOAT,WZYX),
 152         V_(R32_FIXED,   32_FIXED, NONE,     WZYX),
 153
 154         _T(A32_UINT,    32_UINT,  NONE,     WZYX),
 155         _T(A32_SINT,    32_SINT,  NONE,     WZYX),
 156         _T(L32_UINT,    32_UINT,  NONE,     WZYX),
 157         _T(L32_SINT,    32_SINT,  NONE,     WZYX),
 158         _T(I32_UINT,    32_UINT,  NONE,     WZYX),
 159         _T(I32_SINT,    32_SINT,  NONE,     WZYX),
 160
 161         VT(R16G16_UNORM,   16_16_UNORM, R16G16_UNORM, WZYX),
 162         VT(R16G16_SNORM,   16_16_SNORM, R16G16_SNORM, WZYX),
 163         VT(R16G16_UINT,    16_16_UINT,  R16G16_UINT,  WZYX),
 164         VT(R16G16_SINT,    16_16_SINT,  R16G16_SINT,  WZYX),
 165         V_(R16G16_USCALED, 16_16_UINT,  NONE,         WZYX),
 166         V_(R16G16_SSCALED, 16_16_SINT,  NONE,         WZYX),
 167         VT(R16G16_FLOAT,   16_16_FLOAT, R16G16_FLOAT, WZYX),
 168
 169         _T(L16A16_UNORM,   16_16_UNORM, NONE,         WZYX),
 170         _T(L16A16_SNORM,   16_16_SNORM, NONE,         WZYX),
 171         _T(L16A16_UINT,    16_16_UINT,  NONE,         WZYX),
 172         _T(L16A16_SINT,    16_16_SINT,  NONE,         WZYX),
 173
 174         VT(R8G8B8A8_UNORM,   8_8_8_8_UNORM, R8G8B8A8_UNORM, WZYX),
 175         _T(R8G8B8X8_UNORM,   8_8_8_8_UNORM, R8G8B8A8_UNORM, WZYX),
 176         _T(R8G8B8A8_SRGB,    8_8_8_8_UNORM, R8G8B8A8_UNORM, WZYX),
 177         _T(R8G8B8X8_SRGB,    8_8_8_8_UNORM, R8G8B8A8_UNORM, WZYX),
 178         VT(R8G8B8A8_SNORM,   8_8_8_8_SNORM, R8G8B8A8_SNORM, WZYX),
 179         VT(R8G8B8A8_UINT,    8_8_8_8_UINT,  R8G8B8A8_UINT,  WZYX),
 180         VT(R8G8B8A8_SINT,    8_8_8_8_SINT,  R8G8B8A8_SINT,  WZYX),
 181         V_(R8G8B8A8_USCALED, 8_8_8_8_UINT,  NONE,           WZYX),
 182         V_(R8G8B8A8_SSCALED, 8_8_8_8_SINT,  NONE,           WZYX),
 183
 184         VT(B8G8R8A8_UNORM,   8_8_8_8_UNORM, R8G8B8A8_UNORM, WXYZ),
 185         _T(B8G8R8X8_UNORM,   8_8_8_8_UNORM, R8G8B8A8_UNORM, WXYZ),
 186         VT(B8G8R8A8_SRGB,    8_8_8_8_UNORM, R8G8B8A8_UNORM, WXYZ),
 187         _T(B8G8R8X8_SRGB,    8_8_8_8_UNORM, R8G8B8A8_UNORM, WXYZ),
 188
 189         VT(A8B8G8R8_UNORM,   8_8_8_8_UNORM, R8G8B8A8_UNORM, XYZW),
 190         _T(X8B8G8R8_UNORM,   8_8_8_8_UNORM, R8G8B8A8_UNORM, XYZW),
 191         _T(A8B8G8R8_SRGB,    8_8_8_8_UNORM, R8G8B8A8_UNORM, XYZW),
 192         _T(X8B8G8R8_SRGB,    8_8_8_8_UNORM, R8G8B8A8_UNORM, XYZW),
 193
 194         VT(A8R8G8B8_UNORM,   8_8_8_8_UNORM, R8G8B8A8_UNORM, ZYXW),
 195         _T(X8R8G8B8_UNORM,   8_8_8_8_UNORM, R8G8B8A8_UNORM, ZYXW),
 196         _T(A8R8G8B8_SRGB,    8_8_8_8_UNORM, R8G8B8A8_UNORM, ZYXW),
 197         _T(X8R8G8B8_SRGB,    8_8_8_8_UNORM, R8G8B8A8_UNORM, ZYXW),
 198
 199         VT(R10G10B10A2_UNORM,   10_10_10_2_UNORM, R10G10B10A2_UNORM, WZYX),
 200         VT(B10G10R10A2_UNORM,   10_10_10_2_UNORM, R10G10B10A2_UNORM, WXYZ),
 201         _T(B10G10R10X2_UNORM,   10_10_10_2_UNORM, R10G10B10A2_UNORM, WXYZ),
 202         V_(R10G10B10A2_SNORM,   10_10_10_2_SNORM, NONE,              WZYX),
 203         V_(R10G10B10A2_UINT,    10_10_10_2_UINT,  NONE,              WZYX),
 204         V_(R10G10B10A2_USCALED, 10_10_10_2_UINT,  NONE,              WZYX),
 205         V_(R10G10B10A2_SSCALED, 10_10_10_2_SINT,  NONE,              WZYX),
 206
 207         _T(R11G11B10_FLOAT, 11_11_10_FLOAT, R11G11B10_FLOAT, WZYX),
 208         _T(R9G9B9E5_FLOAT,  9_9_9_E5_FLOAT, NONE,            WZYX),
 209
 210         _T(Z24X8_UNORM,       X8Z24_UNORM, R8G8B8A8_UNORM, WZYX),
 211         _T(Z24_UNORM_S8_UINT, X8Z24_UNORM, R8G8B8A8_UNORM, WZYX),
 212         _T(Z32_FLOAT,         32_FLOAT,   R8G8B8A8_UNORM, WZYX),
 213         _T(Z32_FLOAT_S8X24_UINT, 32_FLOAT,R8G8B8A8_UNORM, WZYX),
 214
 215         /* 48-bit */
 216         V_(R16G16B16_UNORM,   16_16_16_UNORM, NONE, WZYX),
 217         V_(R16G16B16_SNORM,   16_16_16_SNORM, NONE, WZYX),
 218         V_(R16G16B16_UINT,    16_16_16_UINT,  NONE, WZYX),
 219         V_(R16G16B16_SINT,    16_16_16_SINT,  NONE, WZYX),
 220         V_(R16G16B16_USCALED, 16_16_16_UINT,  NONE, WZYX),
 221         V_(R16G16B16_SSCALED, 16_16_16_SINT,  NONE, WZYX),
 222         V_(R16G16B16_FLOAT,   16_16_16_FLOAT, NONE, WZYX),
 223
 224         /* 64-bit */
 225         VT(R16G16B16A16_UNORM,   16_16_16_16_UNORM, R16G16B16A16_UNORM, WZYX),
 226         VT(R16G16B16X16_UNORM,   16_16_16_16_UNORM, R16G16B16A16_UNORM, WZYX),
 227         VT(R16G16B16A16_SNORM,   16_16_16_16_SNORM, R16G16B16A16_SNORM, WZYX),
 228         VT(R16G16B16X16_SNORM,   16_16_16_16_SNORM, R16G16B16A16_SNORM, WZYX),
 229         VT(R16G16B16A16_UINT,    16_16_16_16_UINT,  R16G16B16A16_UINT,  WZYX),
 230         _T(R16G16B16X16_UINT,    16_16_16_16_UINT,  R16G16B16A16_UINT,  WZYX),
 231         VT(R16G16B16A16_SINT,    16_16_16_16_SINT,  R16G16B16A16_SINT,  WZYX),
 232         _T(R16G16B16X16_SINT,    16_16_16_16_SINT,  R16G16B16A16_SINT,  WZYX),
 233         V_(R16G16B16A16_USCALED, 16_16_16_16_UINT,  NONE,               WZYX),
 234         V_(R16G16B16A16_SSCALED, 16_16_16_16_SINT,  NONE,               WZYX),
 235         VT(R16G16B16A16_FLOAT,   16_16_16_16_FLOAT, R16G16B16A16_FLOAT, WZYX),
 236         _T(R16G16B16X16_FLOAT,   16_16_16_16_FLOAT, R16G16B16A16_FLOAT, WZYX),
 237
 238         VT(R32G32_UINT,    32_32_UINT,  R32G32_UINT, WZYX),
 239         VT(R32G32_SINT,    32_32_SINT,  R32G32_SINT, WZYX),
 240         V_(R32G32_USCALED, 32_32_UINT,  NONE,        WZYX),
 241         V_(R32G32_SSCALED, 32_32_SINT,  NONE,        WZYX),
 242         VT(R32G32_FLOAT,   32_32_FLOAT, R32G32_FLOAT,WZYX),
 243         V_(R32G32_FIXED,   32_32_FIXED, NONE,        WZYX),
 244
 245         _T(L32A32_UINT,    32_32_UINT,  NONE,        WZYX),
 246         _T(L32A32_SINT,    32_32_SINT,  NONE,        WZYX),
 247
 248         /* 96-bit */
 249         V_(R32G32B32_UINT,    32_32_32_UINT,  NONE, WZYX),
 250         V_(R32G32B32_SINT,    32_32_32_SINT,  NONE, WZYX),
 251         V_(R32G32B32_USCALED, 32_32_32_UINT,  NONE, WZYX),
 252         V_(R32G32B32_SSCALED, 32_32_32_SINT,  NONE, WZYX),
 253         V_(R32G32B32_FLOAT,   32_32_32_FLOAT, NONE, WZYX),
 254         V_(R32G32B32_FIXED,   32_32_32_FIXED, NONE, WZYX),
 255
 256         /* 128-bit */
 257         VT(R32G32B32A32_UINT,    32_32_32_32_UINT,  R32G32B32A32_UINT,  WZYX),
 258         _T(R32G32B32X32_UINT,    32_32_32_32_UINT,  R32G32B32A32_UINT,  WZYX),
 259         VT(R32G32B32A32_SINT,    32_32_32_32_SINT,  R32G32B32A32_SINT,  WZYX),
 260         _T(R32G32B32X32_SINT,    32_32_32_32_SINT,  R32G32B32A32_SINT,  WZYX),
 261         V_(R32G32B32A32_USCALED, 32_32_32_32_UINT,  NONE,               WZYX),
 262         V_(R32G32B32A32_SSCALED, 32_32_32_32_SINT,  NONE,               WZYX),
 263         VT(R32G32B32A32_FLOAT,   32_32_32_32_FLOAT, R32G32B32A32_FLOAT, WZYX),
 264         _T(R32G32B32X32_FLOAT,   32_32_32_32_FLOAT, R32G32B32A32_FLOAT, WZYX),
 265         V_(R32G32B32A32_FIXED,   32_32_32_32_FIXED, NONE,               WZYX),
 266
 267         /* compressed */
 268         _T(ETC1_RGB8, ETC1, NONE, WZYX),
 269         _T(ETC2_RGB8, ETC2_RGB8, NONE, WZYX),
 270         _T(ETC2_SRGB8, ETC2_RGB8, NONE, WZYX),
 271         _T(ETC2_RGB8A1, ETC2_RGB8A1, NONE, WZYX),
 272         _T(ETC2_SRGB8A1, ETC2_RGB8A1, NONE, WZYX),
 273         _T(ETC2_RGBA8, ETC2_RGBA8, NONE, WZYX),
 274         _T(ETC2_SRGBA8, ETC2_RGBA8, NONE, WZYX),
 275         _T(ETC2_R11_UNORM, ETC2_R11_UNORM, NONE, WZYX),
 276         _T(ETC2_R11_SNORM, ETC2_R11_SNORM, NONE, WZYX),
 277         _T(ETC2_RG11_UNORM, ETC2_RG11_UNORM, NONE, WZYX),
 278         _T(ETC2_RG11_SNORM, ETC2_RG11_SNORM, NONE, WZYX),
 279
 280         _T(DXT1_RGB,   DXT1, NONE, WZYX),
 281         _T(DXT1_SRGB,  DXT1, NONE, WZYX),
 282         _T(DXT1_RGBA,  DXT1, NONE, WZYX),
 283         _T(DXT1_SRGBA, DXT1, NONE, WZYX),
 284         _T(DXT3_RGBA,  DXT3, NONE, WZYX),
 285         _T(DXT3_SRGBA, DXT3, NONE, WZYX),
 286         _T(DXT5_RGBA,  DXT5, NONE, WZYX),
 287         _T(DXT5_SRGBA, DXT5, NONE, WZYX),
 288
 289         _T(BPTC_RGBA_UNORM, BPTC,        NONE, WZYX),
 290         _T(BPTC_SRGBA,      BPTC,        NONE, WZYX),
 291         _T(BPTC_RGB_FLOAT,  BPTC_FLOAT,  NONE, WZYX),
 292         _T(BPTC_RGB_UFLOAT, BPTC_UFLOAT, NONE, WZYX),
 293
 294         /* faked */
 295         _T(RGTC1_UNORM, 8_8_8_8_UNORM, NONE, WZYX),
 296         _T(RGTC1_SNORM, 8_8_8_8_SNORM, NONE, WZYX),
 297         _T(RGTC2_UNORM, 8_8_8_8_UNORM, NONE, WZYX),
 298         _T(RGTC2_SNORM, 8_8_8_8_SNORM, NONE, WZYX),
 299         _T(LATC1_UNORM, 8_8_8_8_UNORM, NONE, WZYX),
 300         _T(LATC1_SNORM, 8_8_8_8_SNORM, NONE, WZYX),
 301         _T(LATC2_UNORM, 8_8_8_8_UNORM, NONE, WZYX),
 302         _T(LATC2_SNORM, 8_8_8_8_SNORM, NONE, WZYX),
 303 };
 304
 305 /* convert pipe format to vertex buffer format: */
 306 enum a4xx_vtx_fmt
 307 fd4_pipe2vtx(enum pipe_format format)
 308 {
 309         if (!formats[format].present)
 310                 return ~0;
 311         return formats[format].vtx;
 312 }
 313
 314 /* convert pipe format to texture sampler format: */
 315 enum a4xx_tex_fmt
 316 fd4_pipe2tex(enum pipe_format format)
 317 {
 318         if (!formats[format].present)
 319                 return ~0;
 320         return formats[format].tex;
 321 }
 322
 323 /* convert pipe format to MRT / copydest format used for render-target: */
 324 enum a4xx_color_fmt
 325 fd4_pipe2color(enum pipe_format format)
 326 {
 327         if (!formats[format].present)
 328                 return ~0;
 329         return formats[format].rb;
 330 }
 331
 332 enum a3xx_color_swap
 333 fd4_pipe2swap(enum pipe_format format)
 334 {
 335         if (!formats[format].present)
 336                 return WZYX;
 337         return formats[format].swap;
 338 }
 339
 340 enum a4xx_tex_fetchsize
 341 fd4_pipe2fetchsize(enum pipe_format format)
 342 {
 343         if (format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT)
 344                 format = PIPE_FORMAT_Z32_FLOAT;
 345         else if (util_format_description(format)->layout == UTIL_FORMAT_LAYOUT_RGTC)
 346                 format = PIPE_FORMAT_R8G8B8A8_UNORM;
 347
 348         switch (util_format_get_blocksizebits(format) / util_format_get_blockwidth(format)) {
 349         case 8:   return TFETCH4_1_BYTE;
 350         case 16:  return TFETCH4_2_BYTE;
 351         case 32:  return TFETCH4_4_BYTE;
 352         case 64:  return TFETCH4_8_BYTE;
 353         case 128: return TFETCH4_16_BYTE;
 354         default:
 355                 debug_printf("Unknown block size for format %s: %d\n",
 356                                 util_format_name(format),
 357                                 util_format_get_blocksizebits(format));
 358                 return TFETCH4_1_BYTE;
 359         }
 360 }
 361
 362 unsigned
 363 fd4_pipe2nblocksx(enum pipe_format format, unsigned width)
 364 {
 365         if (util_format_description(format)->layout == UTIL_FORMAT_LAYOUT_RGTC)
 366                 format = PIPE_FORMAT_R8G8B8A8_UNORM;
 367         return util_format_get_nblocksx(format, width);
 368 }
 369
 370 /* we need to special case a bit the depth/stencil restore, because we are
 371  * using the texture sampler to blit into the depth/stencil buffer, *not*
 372  * into a color buffer.  Otherwise fd4_tex_swiz() will do the wrong thing,
 373  * as it is assuming that you are sampling into normal render target..
 374  *
 375  * TODO looks like we can probably share w/ a3xx..
 376  */
 377 enum pipe_format
 378 fd4_gmem_restore_format(enum pipe_format format)
 379 {
 380         switch (format) {
 381         case PIPE_FORMAT_Z24X8_UNORM:
 382         case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 383                 return PIPE_FORMAT_R8G8B8A8_UNORM;
 384         case PIPE_FORMAT_Z16_UNORM:
 385                 return PIPE_FORMAT_R8G8_UNORM;
 386         case PIPE_FORMAT_S8_UINT:
 387                 return PIPE_FORMAT_R8_UNORM;
 388         default:
 389                 return format;
 390         }
 391 }
 392
 393 enum a4xx_depth_format
 394 fd4_pipe2depth(enum pipe_format format)
 395 {
 396         switch (format) {
 397         case PIPE_FORMAT_Z16_UNORM:
 398                 return DEPTH4_16;
 399         case PIPE_FORMAT_Z24X8_UNORM:
 400         case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 401         case PIPE_FORMAT_X8Z24_UNORM:
 402         case PIPE_FORMAT_S8_UINT_Z24_UNORM:
 403                 return DEPTH4_24_8;
 404         case PIPE_FORMAT_Z32_FLOAT:
 405         case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
 406                 return DEPTH4_32;
 407         default:
 408                 return ~0;
 409         }
 410 }
 411
 412 static inline enum a4xx_tex_swiz
 413 tex_swiz(unsigned swiz)
 414 {
 415         switch (swiz) {
 416         default:
 417         case PIPE_SWIZZLE_RED:   return A4XX_TEX_X;
 418         case PIPE_SWIZZLE_GREEN: return A4XX_TEX_Y;
 419         case PIPE_SWIZZLE_BLUE:  return A4XX_TEX_Z;
 420         case PIPE_SWIZZLE_ALPHA: return A4XX_TEX_W;
 421         case PIPE_SWIZZLE_ZERO:  return A4XX_TEX_ZERO;
 422         case PIPE_SWIZZLE_ONE:   return A4XX_TEX_ONE;
 423         }
 424 }
 425
 426 uint32_t
 427 fd4_tex_swiz(enum pipe_format format, unsigned swizzle_r, unsigned swizzle_g,
 428                 unsigned swizzle_b, unsigned swizzle_a)
 429 {
 430         const struct util_format_description *desc =
 431                         util_format_description(format);
 432         unsigned char swiz[4] = {
 433                         swizzle_r, swizzle_g, swizzle_b, swizzle_a,
 434         }, rswiz[4];
 435
 436         util_format_compose_swizzles(desc->swizzle, swiz, rswiz);
 437
 438         return A4XX_TEX_CONST_0_SWIZ_X(tex_swiz(rswiz[0])) |
 439                         A4XX_TEX_CONST_0_SWIZ_Y(tex_swiz(rswiz[1])) |
 440                         A4XX_TEX_CONST_0_SWIZ_Z(tex_swiz(rswiz[2])) |
 441                         A4XX_TEX_CONST_0_SWIZ_W(tex_swiz(rswiz[3]));
 442 }