mesa: Branch 'master' - 2 commits

[Haihao Xiang]

 src/mesa/drivers/dri/i965/brw_tex.c |   15 +++++-
 src/mesa/main/texcompress_fxt1.c    |   79 ++++++++++++++++++++----------------
 2 files changed, 56 insertions(+), 38 deletions(-)

New commits:
diff-tree b6fe1bdd4da806895f90f3f5be4fb364d6f1f64a (from 84081774e62a8af18e6bf894ea69f63b97dcfe96)
Author: Xiang, Haihao <haihao.xiang at intel.com>
Date:   Sun Mar 18 18:34:21 2007 +0800

    mesa: enhance fxt1_quantize_ALPHA1
    
    If possible, let minCol != maxCol

diff --git a/src/mesa/main/texcompress_fxt1.c b/src/mesa/main/texcompress_fxt1.c
index d3011ce..411d51c 100644
--- a/src/mesa/main/texcompress_fxt1.c
+++ b/src/mesa/main/texcompress_fxt1.c
@@ -752,44 +752,55 @@ fxt1_quantize_ALPHA1 (GLuint *cc,
    GLint minColL = 0, maxColL = 0;
    GLint minColR = 0, maxColR = 0;
    GLint sumL = 0, sumR = 0;
-
+   GLint nn_comp;
    /* Our solution here is to find the darkest and brightest colors in
     * the 4x4 tile and use those as the two representative colors.
     * There are probably better algorithms to use (histogram-based).
     */
-   minSum = 2000; /* big enough */
-   maxSum = -1; /* small enough */
-   for (k = 0; k < N_TEXELS / 2; k++) {
-      GLint sum = 0;
-      for (i = 0; i < n_comp; i++) {
-         sum += input[k][i];
-      }
-      if (minSum > sum) {
-         minSum = sum;
-         minColL = k;
-      }
-      if (maxSum < sum) {
-         maxSum = sum;
-         maxColL = k;
-      }
-      sumL += sum;
-   }
-   minSum = 2000; /* big enough */
-   maxSum = -1; /* small enough */
-   for (; k < N_TEXELS; k++) {
-      GLint sum = 0;
-      for (i = 0; i < n_comp; i++) {
-         sum += input[k][i];
-      }
-      if (minSum > sum) {
-         minSum = sum;
-         minColR = k;
-      }
-      if (maxSum < sum) {
-         maxSum = sum;
-         maxColR = k;
-      }
-      sumR += sum;
+   nn_comp = n_comp;
+   while ((minColL == maxColL) && nn_comp) {
+       minSum = 2000; /* big enough */
+       maxSum = -1; /* small enough */
+       for (k = 0; k < N_TEXELS / 2; k++) {
+           GLint sum = 0;
+           for (i = 0; i < nn_comp; i++) {
+               sum += input[k][i];
+           }
+           if (minSum > sum) {
+               minSum = sum;
+               minColL = k;
+           }
+           if (maxSum < sum) {
+               maxSum = sum;
+               maxColL = k;
+           }
+           sumL += sum;
+       }
+       
+       nn_comp--;
+   }
+
+   nn_comp = n_comp;
+   while ((minColR == maxColR) && nn_comp) {
+       minSum = 2000; /* big enough */
+       maxSum = -1; /* small enough */
+       for (k = N_TEXELS / 2; k < N_TEXELS; k++) {
+           GLint sum = 0;
+           for (i = 0; i < nn_comp; i++) {
+               sum += input[k][i];
+           }
+           if (minSum > sum) {
+               minSum = sum;
+               minColR = k;
+           }
+           if (maxSum < sum) {
+               maxSum = sum;
+               maxColR = k;
+           }
+           sumR += sum;
+       }
+
+       nn_comp--;
    }
 
    /* choose the common vector (yuck!) */
diff-tree 84081774e62a8af18e6bf894ea69f63b97dcfe96 (from cfe984dbd0c478906785dbf8a9430504173ae952)
Author: Xiang, Haihao <haihao.xiang at intel.com>
Date:   Sun Mar 18 18:26:16 2007 +0800

    i965: fix for FXT1 & S3TC texture format
    
    choose the right mesa texformat for FXT1 & S3TC

diff --git a/src/mesa/drivers/dri/i965/brw_tex.c b/src/mesa/drivers/dri/i965/brw_tex.c
index c3ffa9e..467aec6 100644
--- a/src/mesa/drivers/dri/i965/brw_tex.c
+++ b/src/mesa/drivers/dri/i965/brw_tex.c
@@ -148,18 +148,25 @@ brwChooseTextureFormat( GLcontext *ctx, 
          return &_mesa_texformat_ycbcr_rev;
 
    case GL_COMPRESSED_RGB_FXT1_3DFX:
+       return &_mesa_texformat_rgb_fxt1;
    case GL_COMPRESSED_RGBA_FXT1_3DFX:
-     return &_mesa_texformat_rgb_fxt1;
+       return &_mesa_texformat_rgba_fxt1;
 
    case GL_RGB_S3TC:
    case GL_RGB4_S3TC:
+   case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
+       return &_mesa_texformat_rgb_dxt1;
+
+   case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
+       return &_mesa_texformat_rgba_dxt1;
+
    case GL_RGBA_S3TC:
    case GL_RGBA4_S3TC:
    case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
+       return &_mesa_texformat_rgba_dxt3;
+
    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
-   case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
-   case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
-     return &_mesa_texformat_rgb_dxt1; /* there is no rgba support? */
+       return &_mesa_texformat_rgba_dxt5;
 
    case GL_DEPTH_COMPONENT:
    case GL_DEPTH_COMPONENT16: