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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(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 }
     85