SL-17274: Add debug rendering to pbr shader

indra/newview/app_settings/shaders/class1/deferred/pbropaqueF.glsl

@@ -25,6 +25,19 @@
 
 /*[EXTRA_CODE_HERE]*/
 
+#define DEBUG_BASIC         1
+#define DEBUG_COLOR         0
+#define DEBUG_NORMAL        0
+#define DEBUG_POSITION      0
+#define DEBUG_REFLECT_VEC   0
+#define DEBUG_REFLECT_COLOR 0
+
+#ifdef HAS_SPECULAR_MAP
+uniform sampler2D specularMap;
+#endif
+uniform samplerCube environmentMap;
+uniform mat3        env_mat;
+
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[3];
 #else
@@ -35,19 +48,62 @@ VARYING vec3 vary_position;
 VARYING vec3 vary_normal;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
+#ifdef HAS_SPECULAR_MAP
+VARYING vec2 vary_texcoord2;
+#endif
 
 vec2 encode_normal(vec3 n);
 vec3 linear_to_srgb(vec3 c);
 
-void main() 
+struct PBR
 {
-	vec3 col = vertex_color.rgb * diffuseLookup(vary_texcoord0.xy).rgb;
+    float LdotH; // Light and Half
+    float NdotL; // Normal and Light
+    float NdotH; // Normal and Half
+    float VdotH; // View and Half
+};
 
-	vec3 spec;
-	spec.rgb = vec3(vertex_color.a);
-col.rgb = vec3( 1, 0, 1 ); // DEBUG
-	frag_data[0] = vec4(col, 0.0);
-	frag_data[1] = vec4(spec, vertex_color.a); // spec
-	vec3 nvn = normalize(vary_normal);
-	frag_data[2] = vec4(encode_normal(nvn.xyz), vertex_color.a, 0.0);
+const float M_PI = 3.141592653589793;
+
+void main()
+{
+    vec3 col = vertex_color.rgb * diffuseLookup(vary_texcoord0.xy).rgb;
+
+//#ifdef HAS_SPECULAR_MAP
+//#else
+    vec4 norm  = vec4(0,0,0,1.0);
+    vec3 tnorm = vary_normal;
+//#endif
+    norm.xyz = normalize(tnorm.xyz);
+
+    vec3 spec;
+    spec.rgb = vec3(vertex_color.a);
+
+    vec3 pos = vary_position;
+    vec3 refnormpersp = normalize(reflect(pos.xyz, norm.xyz));
+    vec3 env_vec = env_mat * refnormpersp;
+    vec3 reflected_color = textureCube(environmentMap, env_vec).rgb;
+
+#if DEBUG_BASIC
+    col.rgb = vec3( 1, 0, 1 ); // DEBUG
+#endif
+#if DEBUG_COLOR
+    col.rgb = vertex_color.rgb;
+#endif
+#if DEBUG_NORMAL
+    col.rgb = vary_normal;
+#endif
+#if DEBUG_POSITION
+    col.rgb = vary_position.xyz;
+#endif
+#if DEBUG_REFLECT_VEC
+    col.rgb = refnormpersp;
+#endif
+#if DEBUG_REFLECT_COLOR
+    col.rgb = reflected_color;
+#endif
+
+    frag_data[0] = vec4(col, 0.0);
+    frag_data[1] = vec4(spec, vertex_color.a); // spec
+    frag_data[2] = vec4(encode_normal(norm.xyz), vertex_color.a, 0.0);
 }