diff options
Diffstat (limited to 'src/gallium/auxiliary/util')
| -rw-r--r-- | src/gallium/auxiliary/util/p_tile.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/src/gallium/auxiliary/util/p_tile.c b/src/gallium/auxiliary/util/p_tile.c index 1a1a2d96cc..580a95568e 100644 --- a/src/gallium/auxiliary/util/p_tile.c +++ b/src/gallium/auxiliary/util/p_tile.c @@ -632,13 +632,10 @@ ycbcr_get_tile_rgba(ushort *src, const float scale = 1.0f / 255.0f; unsigned i, j; - /* we're assuming we're being asked for an even number of texels */ - assert((w & 1) == 0); - for (i = 0; i < h; i++) { float *pRow = p; /* do two texels at a time */ - for (j = 0; j < w; j += 2, src += 2) { + for (j = 0; j < (w & ~1); j += 2, src += 2) { const ushort t0 = src[0]; const ushort t1 = src[1]; const ubyte y0 = (t0 >> 8) & 0xff; /* luminance */ @@ -676,6 +673,33 @@ ycbcr_get_tile_rgba(ushort *src, pRow += 4; } + /* do the last texel */ + if (w & 1) { + const ushort t0 = src[0]; + const ushort t1 = src[1]; + const ubyte y0 = (t0 >> 8) & 0xff; /* luminance */ + ubyte cb, cr; + float r, g, b; + + if (rev) { + cb = t1 & 0xff; /* chroma U */ + cr = t0 & 0xff; /* chroma V */ + } + else { + cb = t0 & 0xff; /* chroma U */ + cr = t1 & 0xff; /* chroma V */ + } + + /* even pixel: y0,cr,cb */ + r = 1.164f * (y0-16) + 1.596f * (cr-128); + g = 1.164f * (y0-16) - 0.813f * (cr-128) - 0.391f * (cb-128); + b = 1.164f * (y0-16) + 2.018f * (cb-128); + pRow[0] = r * scale; + pRow[1] = g * scale; + pRow[2] = b * scale; + pRow[3] = 1.0f; + pRow += 4; + } p += dst_stride; } } |