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Diffstat (limited to 'src/mesa/drivers/dri/r200')
-rw-r--r--src/mesa/drivers/dri/r200/r200_tex.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/r200/r200_tex.c b/src/mesa/drivers/dri/r200/r200_tex.c
index 2cfbf3510b..6c6450c681 100644
--- a/src/mesa/drivers/dri/r200/r200_tex.c
+++ b/src/mesa/drivers/dri/r200/r200_tex.c
@@ -405,7 +405,9 @@ r200ChooseTextureFormat( GLcontext *ctx, GLint internalFormat,
case GL_ALPHA12:
case GL_ALPHA16:
case GL_COMPRESSED_ALPHA:
- return _dri_texformat_a8;
+ /* can't use a8 format since interpreting hw I8 as a8 would result
+ in wrong rgb values (same as alpha value instead of 0). */
+ return _dri_texformat_al88;
case 1:
case GL_LUMINANCE: