diff options
| author | Roland Scheidegger <[email protected]> | 2013-07-22 21:02:56 +0200 |
|---|---|---|
| committer | Roland Scheidegger <[email protected]> | 2013-07-24 15:58:00 +0200 |
| commit | bceb5f36ec9a8fdda515102c3e52f41aa6cad1c5 (patch) | |
| tree | 804820637f09de7bdbcaeee3d30f7bda8872f00e /src/mesa/main/texcompress_rgtc_tmp.h | |
| parent | 0acf3a8407fbeaa9d61731ce83fbe6de529e303c (diff) | |
mesa: fix rgtc snorm decoding
The codeword must be unsigned (otherwise will shift in 1's from above when
merging low/high parts so some texels decode wrong).
This also affects gallium's util/u_format_rgtc.
Reviewed-by: Jose Fonseca <[email protected]>
Reviewed-by: Zack Rusin <[email protected]>
Diffstat (limited to 'src/mesa/main/texcompress_rgtc_tmp.h')
| -rw-r--r-- | src/mesa/main/texcompress_rgtc_tmp.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/mesa/main/texcompress_rgtc_tmp.h b/src/mesa/main/texcompress_rgtc_tmp.h index 277d69b1798..5fa9de630b6 100644 --- a/src/mesa/main/texcompress_rgtc_tmp.h +++ b/src/mesa/main/texcompress_rgtc_tmp.h @@ -37,9 +37,9 @@ static void TAG(fetch_texel_rgtc)(unsigned srcRowStride, const TYPE *pixdata, const TYPE alpha0 = blksrc[0]; const TYPE alpha1 = blksrc[1]; const char bit_pos = ((j&3) * 4 + (i&3)) * 3; - const TYPE acodelow = blksrc[2 + bit_pos / 8]; - const TYPE acodehigh = (3 + bit_pos / 8) < 8 ? blksrc[3 + bit_pos / 8] : 0; - const TYPE code = (acodelow >> (bit_pos & 0x7) | + const unsigned char acodelow = blksrc[2 + bit_pos / 8]; + const unsigned char acodehigh = (3 + bit_pos / 8) < 8 ? blksrc[3 + bit_pos / 8] : 0; + const unsigned char code = (acodelow >> (bit_pos & 0x7) | (acodehigh << (8 - (bit_pos & 0x7)))) & 0x7; if (code == 0) |