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      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 }
     81