diff options
Diffstat (limited to 'src/mesa/main/blend.c')
| -rw-r--r-- | src/mesa/main/blend.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/mesa/main/blend.c b/src/mesa/main/blend.c index bc446edcabb..5bc40a028bd 100644 --- a/src/mesa/main/blend.c +++ b/src/mesa/main/blend.c @@ -166,6 +166,24 @@ _mesa_BlendFunc( GLenum sfactor, GLenum dfactor ) _mesa_BlendFuncSeparateEXT(sfactor, dfactor, sfactor, dfactor); } +static GLboolean +blend_factor_is_dual_src(GLenum factor) +{ + return (factor == GL_SRC1_COLOR || + factor == GL_SRC1_ALPHA || + factor == GL_ONE_MINUS_SRC1_COLOR || + factor == GL_ONE_MINUS_SRC1_ALPHA); +} + +static void +update_uses_dual_src(struct gl_context *ctx, int buf) +{ + ctx->Color.Blend[buf]._UsesDualSrc = + (blend_factor_is_dual_src(ctx->Color.Blend[buf].SrcRGB) || + blend_factor_is_dual_src(ctx->Color.Blend[buf].DstRGB) || + blend_factor_is_dual_src(ctx->Color.Blend[buf].SrcA) || + blend_factor_is_dual_src(ctx->Color.Blend[buf].DstA)); +} /** * Set the separate blend source/dest factors for all draw buffers. @@ -220,6 +238,7 @@ _mesa_BlendFuncSeparateEXT( GLenum sfactorRGB, GLenum dfactorRGB, ctx->Color.Blend[buf].DstRGB = dfactorRGB; ctx->Color.Blend[buf].SrcA = sfactorA; ctx->Color.Blend[buf].DstA = dfactorA; + update_uses_dual_src(ctx, buf); } ctx->Color._BlendFuncPerBuffer = GL_FALSE; @@ -282,6 +301,7 @@ _mesa_BlendFuncSeparatei(GLuint buf, GLenum sfactorRGB, GLenum dfactorRGB, ctx->Color.Blend[buf].DstRGB = dfactorRGB; ctx->Color.Blend[buf].SrcA = sfactorA; ctx->Color.Blend[buf].DstA = dfactorA; + update_uses_dual_src(ctx, buf); ctx->Color._BlendFuncPerBuffer = GL_TRUE; if (ctx->Driver.BlendFuncSeparatei) { |