+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));
+}