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fix GL_MIN/MAX w/ glBlendFuncSeparate bug (Ian Romanick)

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This commit is contained in:
Brian Paul 2003-12-15 18:04:17 +00:00
parent b3b725b1e6
commit 63f4e198b4
1 changed files with 21 additions and 22 deletions
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43
src/mesa/swrast/s_blend.c
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@ -685,9 +685,6 @@ blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[],
}
/*
* Analyze current blending parameters to pick fastest blending function.
* Result: the ctx->Color.BlendFunc pointer is updated.
@ -700,7 +697,27 @@ void _swrast_choose_blend_func( GLcontext *ctx )
const GLenum srcA = ctx->Color.BlendSrcA;
const GLenum dstA = ctx->Color.BlendDstA;
if (srcRGB != srcA || dstRGB != dstA) {
if (eq==GL_MIN_EXT) {
/* Note: GL_MIN ignores the blending weight factors */
#if defined(USE_MMX_ASM)
if ( cpu_has_mmx ) {
SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_min;
}
else
#endif
SWRAST_CONTEXT(ctx)->BlendFunc = blend_min;
}
else if (eq==GL_MAX_EXT) {
/* Note: GL_MAX ignores the blending weight factors */
#if defined(USE_MMX_ASM)
if ( cpu_has_mmx ) {
SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_max;
}
else
#endif
SWRAST_CONTEXT(ctx)->BlendFunc = blend_max;
}
else if (srcRGB != srcA || dstRGB != dstA) {
SWRAST_CONTEXT(ctx)->BlendFunc = blend_general;
}
else if (eq==GL_FUNC_ADD_EXT && srcRGB==GL_SRC_ALPHA
@ -735,24 +752,6 @@ void _swrast_choose_blend_func( GLcontext *ctx )
#endif
SWRAST_CONTEXT(ctx)->BlendFunc = blend_modulate;
}
else if (eq==GL_MIN_EXT) {
#if defined(USE_MMX_ASM)
if ( cpu_has_mmx ) {
SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_min;
}
else
#endif
SWRAST_CONTEXT(ctx)->BlendFunc = blend_min;
}
else if (eq==GL_MAX_EXT) {
#if defined(USE_MMX_ASM)
if ( cpu_has_mmx ) {
SWRAST_CONTEXT(ctx)->BlendFunc = _mesa_mmx_blend_max;
}
else
#endif
SWRAST_CONTEXT(ctx)->BlendFunc = blend_max;
}
else if (eq==GL_FUNC_ADD_EXT && srcRGB == GL_ZERO && dstRGB == GL_ONE) {
SWRAST_CONTEXT(ctx)->BlendFunc = blend_noop;
}