More gles fixes

base/shaders/std/shirr.glsl

@@ -1,4 +1,46 @@
 
+#ifdef GL_ES
+
+vec3 sh_irradiance(const vec3 nor, const vec4 shirr[7]) {
+	const vec3 c1 = vec3(0.429043, 0.429043, 0.429043);
+	const vec3 c2 = vec3(0.511664, 0.511664, 0.511664);
+	const vec3 c3 = vec3(0.743125, 0.743125, 0.743125);
+	const vec3 c4 = vec3(0.886227, 0.886227, 0.886227);
+	const vec3 c5 = vec3(0.247708, 0.247708, 0.247708);
+	// TODO: Use padding for 4th component and pass shirr[].xyz directly
+	vec3 cl00 = vec3(shirr[0].x, shirr[0].y, shirr[0].z);
+	vec3 cl1m1 = vec3(shirr[0].w, shirr[1].x, shirr[1].y);
+	vec3 cl10 = vec3(shirr[1].z, shirr[1].w, shirr[2].x);
+	vec3 cl11 = vec3(shirr[2].y, shirr[2].z, shirr[2].w);
+	vec3 cl2m2 = vec3(shirr[3].x, shirr[3].y, shirr[3].z);
+	vec3 cl2m1 = vec3(shirr[3].w, shirr[4].x, shirr[4].y);
+	vec3 cl20 = vec3(shirr[4].z, shirr[4].w, shirr[5].x);
+	vec3 cl21 = vec3(shirr[5].y, shirr[5].z, shirr[5].w);
+	vec3 cl22 = vec3(shirr[6].x, shirr[6].y, shirr[6].z);
+	float a1 = nor.y * nor.y - (-nor.z) * (-nor.z);
+	float a2 = nor.x * nor.x;
+	float a3 = nor.y * (-nor.z);
+	float a4 = nor.y * nor.x;
+	float a5 = (-nor.z) * nor.x;
+	float a6 = nor.y;
+	float a7 = (-nor.z);
+	float a8 = nor.x;
+	return (
+		c1 * cl22 * vec3(a1, a1, a1) +
+		c3 * cl20 * vec3(a2, a2, a2) +
+		c4 * cl00 -
+		c5 * cl20 +
+		vec3(2.0, 2.0, 2.0) * c1 * cl2m2 * vec3(a3, a3, a3) +
+		vec3(2.0, 2.0, 2.0) * c1 * cl21  * vec3(a4, a4, a4) +
+		vec3(2.0, 2.0, 2.0) * c1 * cl2m1 * vec3(a5, a5, a5) +
+		vec3(2.0, 2.0, 2.0) * c2 * cl11  * vec3(a6, a6, a6) +
+		vec3(2.0, 2.0, 2.0) * c2 * cl1m1 * vec3(a7, a7, a7) +
+		vec3(2.0, 2.0, 2.0) * c2 * cl10  * vec3(a8, a8, a8)
+	);
+}
+
+#else
+
 vec3 sh_irradiance(const vec3 nor, const vec4 shirr[7]) {
 	const float c1 = 0.429043;
 	const float c2 = 0.511664;
@@ -28,3 +70,5 @@ vec3 sh_irradiance(const vec3 nor, const vec4 shirr[7]) {
 		2.0 * c2 * cl10  * nor.x
 	);
 }
+
+#endif