diff --git a/libweston/renderer-gl/fragment.glsl b/libweston/renderer-gl/fragment.glsl
index c49a6cd4..e8dae27d 100644
--- a/libweston/renderer-gl/fragment.glsl
+++ b/libweston/renderer-gl/fragment.glsl
@@ -77,6 +77,10 @@ compile_const bool c_green_tint = DEF_GREEN_TINT;
 compile_const int c_color_pre_curve = DEF_COLOR_PRE_CURVE;
 compile_const int c_color_mapping = DEF_COLOR_MAPPING;
 
+compile_const bool c_need_color_pipeline =
+	c_color_pre_curve != SHADER_COLOR_CURVE_IDENTITY ||
+	c_color_mapping != SHADER_COLOR_MAPPING_IDENTITY;
+
 vec4
 yuva2rgba(vec4 yuva)
 {
@@ -245,9 +249,6 @@ color_mapping(vec3 color)
 vec4
 color_pipeline(vec4 color)
 {
-	/* View alpha (opacity) */
-	color.a *= alpha;
-
 	color.rgb = color_pre_curve(color.rgb);
 	color.rgb = color_mapping(color.rgb);
 
@@ -262,18 +263,35 @@ main()
 	/* Electrical (non-linear) RGBA values, may be premult or not */
 	color = sample_input_texture();
 
-	/* Ensure straight alpha */
-	if (c_input_is_premult) {
-		if (color.a == 0.0)
-			color.rgb = vec3(0, 0, 0);
-		else
-			color.rgb *= 1.0 / color.a;
-	}
+	if (c_need_color_pipeline) {
+		/* Ensure straight alpha */
+		if (c_input_is_premult) {
+			if (color.a == 0.0)
+				color.rgb = vec3(0, 0, 0);
+			else
+				color.rgb *= 1.0 / color.a;
+		}
 
-	color = color_pipeline(color);
+		color = color_pipeline(color);
 
-	/* pre-multiply for blending */
-	color.rgb *= color.a;
+		/* View alpha (opacity) */
+		color.a *= alpha;
+
+		/* pre-multiply for blending */
+		color.rgb *= color.a;
+	} else {
+		/* Fast path for disabled color management */
+
+		if (c_input_is_premult) {
+			/* View alpha (opacity) */
+			color *= alpha;
+		} else {
+			/* View alpha (opacity) */
+			color.a *= alpha;
+			/* pre-multiply for blending */
+			color.rgb *= color.a;
+		}
+	}
 
 	if (c_green_tint)
 		color = vec4(0.0, 0.3, 0.0, 0.2) + color * 0.8;