src/gallium/auxiliary/util/u_format_etc.c

   1 #include "pipe/p_compiler.h"
   2 #include "util/u_debug.h"
   3 #include "util/u_math.h"
   4 #include "u_format_etc.h"
   5
   6 /* define etc1_parse_block and etc. */
   7 #define UINT8_TYPE uint8_t
   8 #define TAG(x) x
   9 #include "../../../mesa/main/texcompress_etc_tmp.h"
  10 #undef TAG
  11 #undef UINT8_TYPE
  12
  13 void
  14 util_format_etc1_rgb8_unpack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  15 {
  16    etc1_unpack_rgba8888(dst_row, dst_stride, src_row, src_stride, width, height);
  17 }
  18
  19 void
  20 util_format_etc1_rgb8_pack_rgba_8unorm(uint8_t *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  21 {
  22    assert(0);
  23 }
  24
  25 void
  26 util_format_etc1_rgb8_unpack_rgba_float(float *dst_row, unsigned dst_stride, const uint8_t *src_row, unsigned src_stride, unsigned width, unsigned height)
  27 {
  28    const unsigned bw = 4, bh = 4, bs = 8, comps = 4;
  29    struct etc1_block block;
  30    unsigned x, y, i, j;
  31
  32    for (y = 0; y < height; y += bh) {
  33       const uint8_t *src = src_row;
  34
  35       for (x = 0; x < width; x+= bw) {
  36          etc1_parse_block(&block, src);
  37
  38          for (j = 0; j < bh; j++) {
  39             float *dst = dst_row + (y + j) * dst_stride / sizeof(*dst_row) + x * comps;
  40             uint8_t tmp[3];
  41
  42             for (i = 0; i < bw; i++) {
  43                etc1_fetch_texel(&block, i, j, tmp);
  44                dst[0] = ubyte_to_float(tmp[0]);
  45                dst[1] = ubyte_to_float(tmp[1]);
  46                dst[2] = ubyte_to_float(tmp[2]);
  47                dst[3] = 1.0f;
  48                dst += comps;
  49             }
  50          }
  51
  52          src += bs;
  53       }
  54
  55       src_row += src_stride;
  56    }
  57 }
  58
  59 void
  60 util_format_etc1_rgb8_pack_rgba_float(uint8_t *dst_row, unsigned dst_stride, const float *src_row, unsigned src_stride, unsigned width, unsigned height)
  61 {
  62    assert(0);
  63 }
  64
  65 void
  66 util_format_etc1_rgb8_fetch_rgba_float(float *dst, const uint8_t *src, unsigned i, unsigned j)
  67 {
  68    struct etc1_block block;
  69    uint8_t tmp[3];
  70
  71    assert(i < 4 && j < 4); /* check i, j against 4x4 block size */
  72
  73    etc1_parse_block(&block, src);
  74    etc1_fetch_texel(&block, i, j, tmp);
  75
  76    dst[0] = ubyte_to_float(tmp[0]);
  77    dst[1] = ubyte_to_float(tmp[1]);
  78    dst[2] = ubyte_to_float(tmp[2]);
  79    dst[3] = 1.0f;
  80 }