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    const unsigned bw = 4, bh = 4, bs = 8, comps = 4;
  17    struct etc1_block block;
  18    unsigned x, y, i, j;
  19
  20    for (y = 0; y < height; y += bh) {
  21       const uint8_t *src = src_row;
  22
  23       for (x = 0; x < width; x+= bw) {
  24          etc1_parse_block(&block, src);
  25
  26          for (j = 0; j < bh; j++) {
  27             uint8_t *dst = dst_row + (y + j) * dst_stride + x * comps;
  28             for (i = 0; i < bw; i++) {
  29                etc1_fetch_texel(&block, i, j, dst);
  30                dst[3] = 255;
  31                dst += comps;
  32             }
  33          }
  34
  35          src += bs;
  36       }
  37
  38       src_row += src_stride;
  39    }
  40 }
  41
  42 void
  43 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)
  44 {
  45    assert(0);
  46 }
  47
  48 void
  49 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)
  50 {
  51    const unsigned bw = 4, bh = 4, bs = 8, comps = 4;
  52    struct etc1_block block;
  53    unsigned x, y, i, j;
  54
  55    for (y = 0; y < height; y += bh) {
  56       const uint8_t *src = src_row;
  57
  58       for (x = 0; x < width; x+= bw) {
  59          etc1_parse_block(&block, src);
  60
  61          for (j = 0; j < bh; j++) {
  62             float *dst = dst_row + (y + j) * dst_stride / sizeof(*dst_row) + x * comps;
  63             uint8_t tmp[3];
  64
  65             for (i = 0; i < bw; i++) {
  66                etc1_fetch_texel(&block, i, j, tmp);
  67                dst[0] = ubyte_to_float(tmp[0]);
  68                dst[1] = ubyte_to_float(tmp[1]);
  69                dst[2] = ubyte_to_float(tmp[2]);
  70                dst[3] = 1.0f;
  71                dst += comps;
  72             }
  73          }
  74
  75          src += bs;
  76       }
  77
  78       src_row += src_stride;
  79    }
  80 }
  81
  82 void
  83 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)
  84 {
  85    assert(0);
  86 }
  87
  88 void
  89 util_format_etc1_rgb8_fetch_rgba_float(float *dst, const uint8_t *src, unsigned i, unsigned j)
  90 {
  91    const unsigned bw = 4, bh = 4;
  92    struct etc1_block block;
  93    uint8_t tmp[3];
  94
  95    assert(i < bw && j < bh);
  96
  97    etc1_parse_block(&block, src);
  98    etc1_fetch_texel(&block, i, j, tmp);
  99
 100    dst[0] = ubyte_to_float(tmp[0]);
 101    dst[1] = ubyte_to_float(tmp[1]);
 102    dst[2] = ubyte_to_float(tmp[2]);
 103    dst[3] = 1.0f;
 104 }