src/gallium/auxiliary/util/u_format_other.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
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  11  * permit persons to whom the Software is furnished to do so, subject to
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  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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  19  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include "u_math.h"
  30 #include "u_format_other.h"
  31
  32
  33 void
  34 util_format_r9g9b9e5_float_unpack_rgba_float(float *dst_row, unsigned dst_stride,
  35                                         const uint8_t *src_row, unsigned src_stride,
  36                                         unsigned width, unsigned height)
  37 {
  38
  39 }
  40
  41 void
  42 util_format_r9g9b9e5_float_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride,
  43                                       const float *src_row, unsigned src_stride,
  44                                       unsigned width, unsigned height)
  45 {
  46
  47 }
  48
  49 void
  50 util_format_r9g9b9e5_float_fetch_rgba_float(float *dst, const uint8_t *src,
  51                                        unsigned i, unsigned j)
  52 {
  53
  54 }
  55
  56
  57 void
  58 util_format_r9g9b9e5_float_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
  59                                          const uint8_t *src_row, unsigned src_stride,
  60                                          unsigned width, unsigned height)
  61 {
  62
  63 }
  64
  65
  66 void
  67 util_format_r9g9b9e5_float_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
  68                                        const uint8_t *src_row, unsigned src_stride,
  69                                        unsigned width, unsigned height)
  70 {
  71
  72 }
  73
  74
  75 void
  76 util_format_r1_unorm_unpack_rgba_float(float *dst_row, unsigned dst_stride,
  77                                   const uint8_t *src_row, unsigned src_stride,
  78                                   unsigned width, unsigned height)
  79 {
  80
  81 }
  82
  83
  84 void
  85 util_format_r1_unorm_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride,
  86                                 const float *src_row, unsigned src_stride,
  87                                 unsigned width, unsigned height)
  88 {
  89
  90 }
  91
  92
  93 void
  94 util_format_r1_unorm_fetch_rgba_float(float *dst, const uint8_t *src,
  95                                  unsigned i, unsigned j)
  96 {
  97
  98 }
  99
 100
 101 void
 102 util_format_r1_unorm_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
 103                                    const uint8_t *src_row, unsigned src_stride,
 104                                    unsigned width, unsigned height)
 105 {
 106
 107 }
 108
 109
 110 void
 111 util_format_r1_unorm_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
 112                                  const uint8_t *src_row, unsigned src_stride,
 113                                  unsigned width, unsigned height)
 114 {
 115 }
 116
 117
 118 /*
 119  * PIPE_FORMAT_R8G8Bx_SNORM
 120  *
 121  * A.k.a. D3DFMT_CxV8U8
 122  */
 123
 124 static uint8_t
 125 r8g8bx_derive(int16_t r, int16_t g)
 126 {
 127    /* Derive blue from red and green components.
 128     * Apparently, we must always use integers to perform calculations,
 129     * otherwise the results won't match D3D's CxV8U8 definition.
 130     */
 131    return (uint8_t)sqrtf(0x7f * 0x7f - r * r - g * g) * 0xff / 0x7f;
 132 }
 133
 134 void
 135 util_format_r8g8bx_snorm_unpack_rgba_float(float *dst_row, unsigned dst_stride,
 136                                       const uint8_t *src_row, unsigned src_stride,
 137                                       unsigned width, unsigned height)
 138 {
 139    unsigned x, y;
 140
 141    for(y = 0; y < height; y += 1) {
 142       float *dst = dst_row;
 143       const uint16_t *src = (const uint16_t *)src_row;
 144       for(x = 0; x < width; x += 1) {
 145          uint16_t value = *src++;
 146          int16_t r, g;
 147
 148 #ifdef PIPE_ARCH_BIG_ENDIAN
 149          value = util_bswap32(value);
 150 #endif
 151
 152          r = ((int16_t)(value << 8)) >> 8;
 153          g = ((int16_t)(value << 0)) >> 8;
 154
 155          dst[0] = (float)(r * (1.0f/0x7f)); /* r */
 156          dst[1] = (float)(g * (1.0f/0x7f)); /* g */
 157          dst[2] = r8g8bx_derive(r, g) * (1.0f/0xff); /* b */
 158          dst[3] = 1.0f; /* a */
 159          dst += 4;
 160       }
 161       src_row += src_stride;
 162       dst_row += dst_stride/sizeof(*dst_row);
 163    }
 164 }
 165
 166
 167 void
 168 util_format_r8g8bx_snorm_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
 169                                        const uint8_t *src_row, unsigned src_stride,
 170                                        unsigned width, unsigned height)
 171 {
 172    unsigned x, y;
 173    for(y = 0; y < height; y += 1) {
 174       uint8_t *dst = dst_row;
 175       const uint16_t *src = (const uint16_t *)src_row;
 176       for(x = 0; x < width; x += 1) {
 177          uint16_t value = *src++;
 178          int16_t r, g;
 179
 180 #ifdef PIPE_ARCH_BIG_ENDIAN
 181          value = util_bswap32(value);
 182 #endif
 183
 184          r = ((int16_t)(value << 8)) >> 8;
 185          g = ((int16_t)(value << 0)) >> 8;
 186
 187          dst[0] = (uint8_t)(((uint16_t)MAX2(r, 0)) * 0xff / 0x7f); /* r */
 188          dst[1] = (uint8_t)(((uint16_t)MAX2(g, 0)) * 0xff / 0x7f); /* g */
 189          dst[2] = r8g8bx_derive(r, g); /* b */
 190          dst[3] = 255; /* a */
 191          dst += 4;
 192       }
 193       src_row += src_stride;
 194       dst_row += dst_stride/sizeof(*dst_row);
 195    }
 196 }
 197
 198
 199 void
 200 util_format_r8g8bx_snorm_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride,
 201                                     const float *src_row, unsigned src_stride,
 202                                     unsigned width, unsigned height)
 203 {
 204    unsigned x, y;
 205    for(y = 0; y < height; y += 1) {
 206       const float *src = src_row;
 207       uint16_t *dst = (uint16_t *)dst_row;
 208       for(x = 0; x < width; x += 1) {
 209          uint16_t value = 0;
 210
 211          value |= (uint16_t)(((int8_t)(CLAMP(src[0], -1, 1) * 0x7f)) & 0xff) ;
 212          value |= (uint16_t)((((int8_t)(CLAMP(src[1], -1, 1) * 0x7f)) & 0xff) << 8) ;
 213
 214 #ifdef PIPE_ARCH_BIG_ENDIAN
 215          value = util_bswap32(value);
 216 #endif
 217
 218          *dst++ = value;
 219
 220          src += 4;
 221       }
 222       dst_row += dst_stride;
 223       src_row += src_stride/sizeof(*src_row);
 224    }
 225 }
 226
 227
 228 void
 229 util_format_r8g8bx_snorm_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride,
 230                                      const uint8_t *src_row, unsigned src_stride,
 231                                      unsigned width, unsigned height)
 232 {
 233    unsigned x, y;
 234
 235    for(y = 0; y < height; y += 1) {
 236       const uint8_t *src = src_row;
 237       uint16_t *dst = (uint16_t *)dst_row;
 238       for(x = 0; x < width; x += 1) {
 239          uint16_t value = 0;
 240
 241          value |= src[0] >> 1;
 242          value |= (src[1] >> 1) << 8;
 243
 244 #ifdef PIPE_ARCH_BIG_ENDIAN
 245          value = util_bswap32(value);
 246 #endif
 247
 248          *dst++ = value;
 249
 250          src += 4;
 251       }
 252       dst_row += dst_stride;
 253       src_row += src_stride/sizeof(*src_row);
 254    }
 255 }
 256
 257
 258 void
 259 util_format_r8g8bx_snorm_fetch_rgba_float(float *dst, const uint8_t *src,
 260                                      unsigned i, unsigned j)
 261 {
 262    uint16_t value = *(const uint16_t *)src;
 263    int16_t r, g;
 264
 265 #ifdef PIPE_ARCH_BIG_ENDIAN
 266    value = util_bswap32(value);
 267 #endif
 268
 269    r = ((int16_t)(value << 8)) >> 8;
 270    g = ((int16_t)(value << 0)) >> 8;
 271
 272    dst[0] = r * (1.0f/0x7f); /* r */
 273    dst[1] = g * (1.0f/0x7f); /* g */
 274    dst[2] = r8g8bx_derive(r, g) * (1.0f/0xff); /* b */
 275    dst[3] = 1.0f; /* a */
 276 }