diff options
| -rw-r--r-- | src/mesa/drivers/dri/r200/r200_tex.c | 4 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/radeon/radeon_texstate.c | 37 |
2 files changed, 30 insertions, 11 deletions
diff --git a/src/mesa/drivers/dri/r200/r200_tex.c b/src/mesa/drivers/dri/r200/r200_tex.c index 2cfbf3510b9..6c6450c681f 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: diff --git a/src/mesa/drivers/dri/radeon/radeon_texstate.c b/src/mesa/drivers/dri/radeon/radeon_texstate.c index 1e3a3951e2d..cfa8d4c9fa2 100644 --- a/src/mesa/drivers/dri/radeon/radeon_texstate.c +++ b/src/mesa/drivers/dri/radeon/radeon_texstate.c @@ -523,9 +523,10 @@ static GLboolean radeonUpdateTextureEnv( GLcontext *ctx, int unit ) /* Set the texture environment state. Isn't this nice and clean? * The chip will automagically set the texture alpha to 0xff when - * the texture format does not include an alpha component. This + * the texture format does not include an alpha component. This * reduces the amount of special-casing we have to do, alpha-only - * textures being a notable exception. + * textures being a notable exception. Doesn't work for luminance + * textures realized with I8 and ALPHA_IN_MAP not set neither (on r100). */ /* Don't cache these results. */ @@ -555,7 +556,10 @@ static GLboolean radeonUpdateTextureEnv( GLcontext *ctx, int unit ) assert(op <= 3); switch ( srcRGBi ) { case GL_TEXTURE: - color_arg[i] = radeon_texture_color[op][unit]; + if (texUnit->_Current->Image[0][0]->_BaseFormat == GL_ALPHA) + color_arg[i] = radeon_zero_color[op]; + else + color_arg[i] = radeon_texture_color[op][unit]; break; case GL_CONSTANT: color_arg[i] = radeon_tfactor_color[op]; @@ -574,12 +578,17 @@ static GLboolean radeonUpdateTextureEnv( GLcontext *ctx, int unit ) break; case GL_TEXTURE0: case GL_TEXTURE1: - case GL_TEXTURE2: + case GL_TEXTURE2: { + GLuint txunit = srcRGBi - GL_TEXTURE0; + if (ctx->Texture.Unit[txunit]._Current->Image[0][0]->_BaseFormat == GL_ALPHA) + color_arg[i] = radeon_zero_color[op]; + else /* implement ogl 1.4/1.5 core spec here, not specification of * GL_ARB_texture_env_crossbar (which would require disabling blending * instead of undefined results when referencing not enabled texunit) */ - color_arg[i] = radeon_texture_color[op][srcRGBi - GL_TEXTURE0]; - break; + color_arg[i] = radeon_texture_color[op][txunit]; + } + break; default: return GL_FALSE; } @@ -592,7 +601,10 @@ static GLboolean radeonUpdateTextureEnv( GLcontext *ctx, int unit ) assert(op <= 1); switch ( srcAi ) { case GL_TEXTURE: - alpha_arg[i] = radeon_texture_alpha[op][unit]; + if (texUnit->_Current->Image[0][0]->_BaseFormat == GL_LUMINANCE) + alpha_arg[i] = radeon_zero_alpha[op+1]; + else + alpha_arg[i] = radeon_texture_alpha[op][unit]; break; case GL_CONSTANT: alpha_arg[i] = radeon_tfactor_alpha[op]; @@ -611,9 +623,14 @@ static GLboolean radeonUpdateTextureEnv( GLcontext *ctx, int unit ) break; case GL_TEXTURE0: case GL_TEXTURE1: - case GL_TEXTURE2: - alpha_arg[i] = radeon_texture_alpha[op][srcAi - GL_TEXTURE0]; - break; + case GL_TEXTURE2: { + GLuint txunit = srcAi - GL_TEXTURE0; + if (ctx->Texture.Unit[txunit]._Current->Image[0][0]->_BaseFormat == GL_LUMINANCE) + alpha_arg[i] = radeon_zero_alpha[op+1]; + else + alpha_arg[i] = radeon_texture_alpha[op][txunit]; + } + break; default: return GL_FALSE; } |