Track glEnable states via static refs instead of map lookups.

Sync light state, bound shader, and various gl context states similarly to render matrices.
Texture handles now refcounted, as multiple viewer textures could ref the same handle (cubemaps do this)
Clean up gl extension loading a bit. Not necessary, but only look for ARB variants if not included in current core version. Removed unused extensions.
Use core shader api if supported, else use ARB. (FN signatures are identical. Just doing some pointer substitution to ARB if not core.)
Attempt at improving VBO update batching. Subdata updates better batched to gether per-frame.
There's probably other stuff I forgot that is in this changeset, too.

Todo: Fix lightstate assertion when toggling fullscreen with shaders off.

indra/newview/app_settings/shaders/class2/lighting/sumLightsSpecularV.glsl

@@ -24,7 +24,6 @@
  */
  
 
-
 float calcDirectionalLightSpecular(inout vec4 specular, vec3 view, vec3 n, vec3 l, vec3 lightCol, float da);
 vec3 calcPointLightSpecular(inout vec4 specular, vec3 view, vec3 v, vec3 n, vec3 l, float r, float pw, vec3 lightCol);
 
@@ -47,9 +46,9 @@ vec4 sumLightsSpecular(vec3 pos, vec3 norm, vec4 color, inout vec4 specularColor
 	vec4 specularSum = vec4(0.0);
 	
 	// Collect normal lights (need to be divided by two, as we later multiply by 2)
-	col.rgb += light_diffuse[1].rgb * calcDirectionalLightSpecular(specularColor, view, norm, light_position[1].xyz,light_diffuse[1].rgb, 1.0);
+	col.rgb += calcPointLightSpecular(specularSum, view, pos, norm, light_position[1].xyz, light_attenuation[1].x, light_attenuation[1].y, light_diffuse[1].rgb);
 	col.rgb += calcPointLightSpecular(specularSum, view, pos, norm, light_position[2].xyz, light_attenuation[2].x, light_attenuation[2].y, light_diffuse[2].rgb); 
-	col.rgb += calcPointLightSpecular(specularSum, view, pos, norm, light_position[3].xyz, light_attenuation[3].x, light_attenuation[3].y, light_diffuse[3].rgb); 
+	col.rgb += calcPointLightSpecular(specularSum, view, pos, norm, light_position[3].xyz, light_attenuation[3].x, light_attenuation[3].y, light_diffuse[3].rgb);
 	col.rgb = scaleDownLight(col.rgb);
 						
 	// Add windlight lights
@@ -58,6 +57,7 @@ vec4 sumLightsSpecular(vec3 pos, vec3 norm, vec4 color, inout vec4 specularColor
 
 	col.rgb = min(col.rgb*color.rgb, 1.0);
 	specularColor.rgb = min(specularColor.rgb*specularSum.rgb, 1.0);
+
 	col.rgb += specularColor.rgb;
 
 	return col;	

indra/newview/app_settings/shaders/class2/lighting/sumLightsV.glsl

@@ -23,6 +23,7 @@
  * $/LicenseInfo$
  */
  
+
 float calcDirectionalLight(vec3 n, vec3 l);
 float calcPointLightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float is_pointlight);
 
@@ -30,29 +31,30 @@ vec3 atmosAmbient(vec3 light);
 vec3 atmosAffectDirectionalLight(float lightIntensity);
 vec3 scaleDownLight(vec3 light);
 
+
 uniform vec4 light_position[8];
 uniform vec3 light_direction[8];
-uniform vec3 light_attenuation[8]; 
+uniform vec3 light_attenuation[8];
 uniform vec3 light_diffuse[8];
 
 vec4 sumLights(vec3 pos, vec3 norm, vec4 color, vec4 baseLight)
 {
 	vec4 col = vec4(0.0, 0.0, 0.0, color.a);
-	
-	// Collect normal lights (need to be divided by two, as we later multiply by 2)
-	col.rgb += light_diffuse[1].rgb * calcDirectionalLight(norm, light_position[1].xyz);
 
+	// Collect normal lights (need to be divided by two, as we later multiply by 2)
+
+	// Collect normal lights
+	col.rgb += light_diffuse[1].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[1], light_direction[1], light_attenuation[1].x, light_attenuation[1].z);
 	col.rgb += light_diffuse[2].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[2], light_direction[2], light_attenuation[2].x, light_attenuation[2].z);
 	col.rgb += light_diffuse[3].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[3], light_direction[3], light_attenuation[3].x, light_attenuation[3].z);
-
 	col.rgb = scaleDownLight(col.rgb);
 
 	// Add windlight lights
 	col.rgb += atmosAmbient(baseLight.rgb);
 	col.rgb += atmosAffectDirectionalLight(calcDirectionalLight(norm, light_position[0].xyz));
-				
+
 	col.rgb = min(col.rgb*color.rgb, 1.0);
-	
-	return col;	
+
+	return col;
 }