Add GLSL keywords for overriding functions

[libs/gl.git] / shaderlib / phong.glsl

diff --git a/shaderlib/phong.glsl b/shaderlib/phong.glsl
index e3b97f5870d4cb93c2fba04934234af20efd8584..f9d8d1e72b971827401575a567fc7ba38f3943a9 100644 (file)
--- a/shaderlib/phong.glsl
+++ b/shaderlib/phong.glsl
@@ -2,19 +2,19 @@ import msp_interface;
 import common;
 import shadow;
 
-const bool use_diffuse_map = false;
-const bool use_specular = false;
-const bool use_specular_map = false;
-const bool use_shininess_map = false;
-const bool use_emission = false;
-const bool use_emission_map = false;
-const bool use_reflectivity = false;
-const bool use_reflectivity_map = false;
-const bool use_sky = false;
-const bool use_fog = false;
+layout(constant_id=auto) const bool use_diffuse_map = false;
+layout(constant_id=auto) const bool use_specular = false;
+layout(constant_id=auto) const bool use_specular_map = false;
+layout(constant_id=auto) const bool use_shininess_map = false;
+layout(constant_id=auto) const bool use_emission = false;
+layout(constant_id=auto) const bool use_emission_map = false;
+layout(constant_id=auto) const bool use_reflectivity = false;
+layout(constant_id=auto) const bool use_reflectivity_map = false;
+layout(constant_id=auto) const bool use_sky = false;
+layout(constant_id=auto) const bool use_fog = false;
 
 #pragma MSP stage(fragment)
-vec4 get_diffuse_color()
+virtual vec4 get_diffuse_color()
 {
        if(use_diffuse_map)
                return texture(diffuse_map, texcoord.xy);
@@ -22,7 +22,7 @@ vec4 get_diffuse_color()
                return basic_material.diffuse;
 }
 
-vec3 get_specular_color()
+virtual vec3 get_specular_color()
 {
        if(use_specular_map)
                return texture(specular_map, texcoord.xy).rgb;
@@ -30,7 +30,7 @@ vec3 get_specular_color()
                return basic_material.specular.rgb;
 }
 
-float get_shininess_value()
+virtual float get_shininess_value()
 {
        if(use_shininess_map)
                return texture(shininess_map, texcoord.xy).r*255.0;
@@ -38,7 +38,7 @@ float get_shininess_value()
                return basic_material.shininess;
 }
 
-vec3 get_emission_color()
+virtual vec3 get_emission_color()
 {
        if(use_emission_map)
                return texture(emission_map, texcoord.xy).rgb;
@@ -46,7 +46,7 @@ vec3 get_emission_color()
                return basic_material.emission.rgb;
 }
 
-float get_reflectivity_value()
+virtual float get_reflectivity_value()
 {
        if(use_reflectivity_map)
                return texture(reflectivity_map, texcoord.xy).r;
@@ -101,7 +101,7 @@ void main()
        vec3 look;
        if(use_normal_map)
        {
-               normal = get_normal_sample();
+               normal = get_fragment_normal();
                look = normalize(tbn_look_dir);
        }
        else