1 files changed, 34 insertions, 11 deletions
diff --git a/indra/newview/app_settings/shaders/class1/environment/terrainF.glsl b/indra/newview/app_settings/shaders/class1/environment/terrainF.glsl
index c61d5a2a08..18f6d91804 100644
--- a/indra/newview/app_settings/shaders/class1/environment/terrainF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/terrainF.glsl
@@ -1,4 +1,4 @@
-/** 
+/**
  * @file terrainF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
@@ -23,19 +23,42 @@
  * $/LicenseInfo$
  */
  
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 gl_FragColor;
+#endif
 
+VARYING vec4 vertex_color;
+VARYING vec4 vary_texcoord0;
+VARYING vec4 vary_texcoord1;
 
-uniform sampler2D detail0;
-uniform sampler2D detail1;
-uniform sampler2D alphaRamp;
+uniform sampler2D detail_0;
+uniform sampler2D detail_1;
+uniform sampler2D detail_2;
+uniform sampler2D detail_3;
+uniform sampler2D alpha_ramp;
 
-void main() 
+vec3 atmosLighting(vec3 light);
+
+vec3 scaleSoftClip(vec3 color);
+
+void main()
 {
-	float a = texture2D(alphaRamp, gl_TexCoord[1].xy).a;
-	vec3 color = mix(texture2D(detail1, gl_TexCoord[2].xy).rgb,
-					 texture2D(detail0, gl_TexCoord[0].xy).rgb,
-					 a);
+	/// Note: This should duplicate the blending functionality currently used for the terrain rendering.
+	
+	/// TODO Confirm tex coords and bind them appropriately in vert shader.
+	vec4 color0 = texture2D(detail_0, vary_texcoord0.xy);
+	vec4 color1 = texture2D(detail_1, vary_texcoord0.xy);
+	vec4 color2 = texture2D(detail_2, vary_texcoord0.xy);
+	vec4 color3 = texture2D(detail_3, vary_texcoord0.xy);
 
-	gl_FragColor.rgb = color;
-	gl_FragColor.a = texture2D(alphaRamp, gl_TexCoord[3].xy).a;
+	float alpha1 = texture2D(alpha_ramp, vary_texcoord0.zw).a;
+	float alpha2 = texture2D(alpha_ramp,vary_texcoord1.xy).a;
+	float alphaFinal = texture2D(alpha_ramp, vary_texcoord1.zw).a;
+	vec4 outColor = mix( mix(color3, color2, alpha2), mix(color1, color0, alpha1), alphaFinal );
+	
+	/// Add WL Components
+	outColor.rgb = atmosLighting(outColor.rgb * vertex_color.rgb);
+	
+	gl_FragColor = vec4(scaleSoftClip(outColor.rgb), 1.0);
 }
+