diff options
| -rw-r--r-- | src/mesa/main/texcompress_rgtc.c | 6 | ||||
| -rw-r--r-- | src/mesa/main/texcompress_rgtc_tmp.h | 27 |
2 files changed, 23 insertions, 10 deletions
diff --git a/src/mesa/main/texcompress_rgtc.c b/src/mesa/main/texcompress_rgtc.c index 6b4e3b13cbe..1b873035b68 100644 --- a/src/mesa/main/texcompress_rgtc.c +++ b/src/mesa/main/texcompress_rgtc.c @@ -364,7 +364,7 @@ static void _fetch_texel_rgtc_s(GLint srcRowStride, const GLbyte *pixdata, else if (code < 6) decode = ((alpha0 * (6 - code) + (alpha1 * (code - 1))) / 5); else if (code == 6) - decode = -127; + decode = -128; else decode = 127; @@ -442,8 +442,8 @@ _mesa_fetch_texel_2d_f_signed_rg_rgtc2(const struct gl_texture_image *texImage, #define TAG(x) signed_##x #define TYPE GLbyte -#define T_MIN (GLbyte)-127 -#define T_MAX (GLbyte)128 +#define T_MIN (GLbyte)-128 +#define T_MAX (GLbyte)127 #include "texcompress_rgtc_tmp.h" diff --git a/src/mesa/main/texcompress_rgtc_tmp.h b/src/mesa/main/texcompress_rgtc_tmp.h index 0f830a5d904..9377a6bd3be 100644 --- a/src/mesa/main/texcompress_rgtc_tmp.h +++ b/src/mesa/main/texcompress_rgtc_tmp.h @@ -73,9 +73,9 @@ static void TAG(encode_rgtc_chan)(TYPE *blkaddr, TYPE srccolors[4][4], } - if ((alphabase[0] > alphabase[1]) && !(alphaabsmin && alphaabsmax)) { /* one color, either max or min */ + if (((alphabase[0] > alphabase[1]) && !(alphaabsmin && alphaabsmax)) + || (alphabase[0] == alphabase[1] && !alphaabsmin && !alphaabsmax)) { /* one color, either max or min */ /* shortcut here since it is a very common case (and also avoids later problems) */ - /* || (alphabase[0] == alphabase[1] && !alphaabsmin && !alphaabsmax) */ /* could also thest for alpha0 == alpha1 (and not min/max), but probably not common, so don't bother */ *blkaddr++ = srccolors[0][0]; @@ -223,8 +223,8 @@ static void TAG(encode_rgtc_chan)(TYPE *blkaddr, TYPE srccolors[4][4], GLshort blockerrlin2 = 0; TYPE nralphainrangelow = 0; TYPE nralphainrangehigh = 0; - alphatest[0] = 0xff; - alphatest[1] = 0x0; + alphatest[0] = T_MAX; + alphatest[1] = T_MIN; /* if we have large range it's likely there are values close to 0/255, try to map them to 0/255 */ for (j = 0; j < numypixels; j++) { for (i = 0; i < numxpixels; i++) { @@ -236,8 +236,8 @@ static void TAG(encode_rgtc_chan)(TYPE *blkaddr, TYPE srccolors[4][4], } /* shouldn't happen too often, don't really care about those degenerated cases */ if (alphatest[1] <= alphatest[0]) { - alphatest[0] = 1; - alphatest[1] = 254; + alphatest[0] = T_MIN+1; + alphatest[1] = T_MAX-1; } for (aindex = 0; aindex < 5; aindex++) { /* don't forget here is always rounded down */ @@ -305,7 +305,7 @@ static void TAG(encode_rgtc_chan)(TYPE *blkaddr, TYPE srccolors[4][4], } alphatest[1] = alphatest[1] + (blockerrlin2 / nralphainrangehigh); if (alphatest[1] > T_MAX) { - alphatest[1] = T_MIN; + alphatest[1] = T_MAX; } alphablockerror3 = 0; @@ -354,23 +354,36 @@ static void TAG(encode_rgtc_chan)(TYPE *blkaddr, TYPE srccolors[4][4], } } } + /* write the alpha values and encoding back. */ if ((alphablockerror1 <= alphablockerror2) && (alphablockerror1 <= alphablockerror3)) { #if RGTC_DEBUG if (alphablockerror1 > 96) fprintf(stderr, "enc1 used, error %d\n", alphablockerror1); + fprintf(stderr,"w1: min %d max %d au0 %d au1 %d\n", + T_MIN, T_MAX, + alphause[1], alphause[0]); #endif + TAG(write_rgtc_encoded_channel)( blkaddr, alphause[1], alphause[0], alphaenc1 ); } else if (alphablockerror2 <= alphablockerror3) { #if RGTC_DEBUG if (alphablockerror2 > 96) fprintf(stderr, "enc2 used, error %d\n", alphablockerror2); + fprintf(stderr,"w2: min %d max %d au0 %d au1 %d\n", + T_MIN, T_MAX, + alphabase[0], alphabase[1]); #endif + TAG(write_rgtc_encoded_channel)( blkaddr, alphabase[0], alphabase[1], alphaenc2 ); } else { #if RGTC_DEBUG fprintf(stderr, "enc3 used, error %d\n", alphablockerror3); + fprintf(stderr,"w3: min %d max %d au0 %d au1 %d\n", + T_MIN, T_MAX, + alphatest[0], alphatest[1]); #endif + TAG(write_rgtc_encoded_channel)( blkaddr, (TYPE)alphatest[0], (TYPE)alphatest[1], alphaenc3 ); } } |