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(UNUSED uint8_t *dst_row, UNUSED unsigned dst_stride,
  21                                        UNUSED const uint8_t *src_row, UNUSED unsigned src_stride,
  22                                        UNUSED unsigned width, UNUSED unsigned height)
  23 {
  24    assert(0);
  25 }
  26
  27 void
  28 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)
  29 {
  30    const unsigned bw = 4, bh = 4, bs = 8, comps = 4;
  31    struct etc1_block block;
  32    unsigned x, y, i, j;
  33
  34    for (y = 0; y < height; y += bh) {
  35       const uint8_t *src = src_row;
  36
  37       for (x = 0; x < width; x+= bw) {
  38          etc1_parse_block(&block, src);
  39
  40          for (j = 0; j < bh; j++) {
  41             float *dst = dst_row + (y + j) * dst_stride / sizeof(*dst_row) + x * comps;
  42             uint8_t tmp[3];
  43
  44             for (i = 0; i < bw; i++) {
  45                etc1_fetch_texel(&block, i, j, tmp);
  46                dst[0] = ubyte_to_float(tmp[0]);
  47                dst[1] = ubyte_to_float(tmp[1]);
  48                dst[2] = ubyte_to_float(tmp[2]);
  49                dst[3] = 1.0f;
  50                dst += comps;
  51             }
  52          }
  53
  54          src += bs;
  55       }
  56
  57       src_row += src_stride;
  58    }
  59 }
  60
  61 void
  62 util_format_etc1_rgb8_pack_rgba_float(UNUSED uint8_t *dst_row, UNUSED unsigned dst_stride,
  63                                       UNUSED const float *src_row, UNUSED unsigned src_stride,
  64                                       UNUSED unsigned width, UNUSED unsigned height)
  65 {
  66    assert(0);
  67 }
  68
  69 void
  70 util_format_etc1_rgb8_fetch_rgba_float(float *dst, const uint8_t *src, unsigned i, unsigned j)
  71 {
  72    struct etc1_block block;
  73    uint8_t tmp[3];
  74
  75    assert(i < 4 && j < 4); /* check i, j against 4x4 block size */
  76
  77    etc1_parse_block(&block, src);
  78    etc1_fetch_texel(&block, i, j, tmp);
  79
  80    dst[0] = ubyte_to_float(tmp[0]);
  81    dst[1] = ubyte_to_float(tmp[1]);
  82    dst[2] = ubyte_to_float(tmp[2]);
  83    dst[3] = 1.0f;
  84 }