From dae03382bf1e3abfcc33417c611b9194c7783b3f Mon Sep 17 00:00:00 2001
From: RealBadAngel <mk@realbadangel.pl>
Date: Mon, 9 Dec 2013 13:25:43 +0100
Subject: Optimize shaders code. Add settings at compile time.

---
 client/shaders/solids_shader/opengl_fragment.glsl | 38 +++++++++++------------
 1 file changed, 18 insertions(+), 20 deletions(-)

(limited to 'client/shaders/solids_shader/opengl_fragment.glsl')

diff --git a/client/shaders/solids_shader/opengl_fragment.glsl b/client/shaders/solids_shader/opengl_fragment.glsl
index 0b6d8f3fc..d81506a4f 100644
--- a/client/shaders/solids_shader/opengl_fragment.glsl
+++ b/client/shaders/solids_shader/opengl_fragment.glsl
@@ -1,23 +1,17 @@
-#version 120
-
 uniform sampler2D baseTexture;
 uniform sampler2D normalTexture;
 uniform sampler2D useNormalmap;
 
-uniform float enableBumpmapping;
-uniform float enableParallaxOcclusion;
-uniform float parallaxOcclusionScale;
-uniform float parallaxOcclusionBias;
-
-
 uniform vec4 skyBgColor;
 uniform float fogDistance;
 uniform vec3 eyePosition;
 
 varying vec3 vPosition;
-varying vec3 tsEyeVec;
 varying vec3 eyeVec;
-varying vec4 vColor;
+
+#ifdef ENABLE_PARALLAX_OCCLUSION
+varying vec3 tsEyeVec;
+#endif
 
 const float e = 2.718281828459;
 
@@ -25,21 +19,24 @@ void main (void)
 {
 	vec3 color;
 	vec2 uv = gl_TexCoord[0].st;
-	
-#ifdef NORMALS
+
+#ifdef USE_NORMALMAPS
+	float use_normalmap = texture2D(useNormalmap,vec2(1.0,1.0)).r;
+#endif
+
+#ifdef ENABLE_PARALLAX_OCCLUSION
 	float height;
 	vec2 tsEye = vec2(tsEyeVec.x,-tsEyeVec.y);
-	
-	float use_normalmap = texture2D(useNormalmap,vec2(1.0,1.0)).r;
-	float enable_bumpmapping = enableBumpmapping;
-	
-	if ((enableParallaxOcclusion == 1.0) && (use_normalmap > 0.0)) {
+
+	if (use_normalmap > 0.0) {
 		float map_height = texture2D(normalTexture, uv).a;
 			if (map_height < 1.0){
-				float height = parallaxOcclusionScale * map_height - parallaxOcclusionBias;
+				float height = PARALLAX_OCCLUSION_SCALE * map_height - PARALLAX_OCCLUSION_BIAS;
 				uv = uv + height * tsEye;
 			}
 	}
+#endif
+
 /* Steep parallax code, for future use
 	if ((parallaxMappingMode == 2.0) && (use_normalmap > 0.0)) {
 		const float numSteps = 40.0;
@@ -59,7 +56,8 @@ void main (void)
 	}
 */
 
-	if ((enable_bumpmapping == 1.0) && (use_normalmap > 0.0)) {
+#ifdef ENABLE_BUMPMAPPING
+	if (use_normalmap > 0.0) {
 		vec3 base = texture2D(baseTexture, uv).rgb;
 		vec3 vVec = normalize(eyeVec);
 		vec3 bump = normalize(texture2D(normalTexture, uv).xyz * 2.0 - 1.0);
@@ -88,5 +86,5 @@ void main (void)
 		float d = max(0.0, min(vPosition.z / fogDistance * 1.5 - 0.6, 1.0));
 		col = mix(col, skyBgColor, d);
 	}
-    gl_FragColor = vec4(col.r, col.g, col.b, alpha);   
+    gl_FragColor = vec4(col.r, col.g, col.b, alpha);
 }
-- 
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