Started refactor to lazily compilable shaders.

shaders/vertex_mesh_face.glsl

@@ -0,0 +1,84 @@
+#pragma STAGE: VERTEX
+#pragma GEOMETRY: MESH
+#pragma FEATURES: FACE LINE V_L V_RGB V_A LIGHTING TEXTURE U_RGBA
+#pragma FEATURE_TOGGLES: V_L V_RGB V_A LIGHTING TEXTURE U_RGBA
+
+
+#ifdef V_L
+#ifdef V_RGB
+#error Vertex luminance and vertex RGB are mutually exclusive
+#endif
+#endif
+
+
+//------------[ Uniforms ]------------//
+layout (location = 0) uniform mat4 mvp_matrix;
+#ifdef LIGHTING
+layout (location = 1) uniform mat4 model_matrix;
+#endif
+#ifdef U_RGBA
+layout (location = 4) uniform vec4 color;
+#endif
+
+
+//------------[ Inputs ]------------//
+layout (location = 0) in vec3 model_vertex_position;
+#ifdef LIGHTING
+layout (location = 1) in vec3 model_vertex_normal;
+#endif
+#ifdef V_L
+layout (location = 2) in float model_vertex_l;
+#endif
+#ifdef V_RGB
+layout (location = 2) in vec3 model_vertex_rgb;
+#endif
+#ifdef V_A
+layout (location = 3) in float model_vertex_a;
+#endif
+#ifdef TEXTURE
+layout (location = 4) in vec2 model_vertex_tex_coord;
+#endif
+
+
+//------------[ Outputs ]------------//
+layout (location = 0) out vec4 clip_vertex_color;
+#ifdef LIGHTING
+layout (location = 1) out vec3 clip_vertex_position;
+layout (location = 2) out vec3 clip_vertex_normal;
+#endif
+#ifdef TEXTURE
+layout (location = 3) out vec2 clip_vertex_tex_coord;
+#endif
+
+
+void main()
+{
+    gl_Position = mvp_matrix * vec4(model_vertex_position, 1.0);
+
+    clip_vertex_color = vec4(1);
+
+#ifdef V_L
+    clip_vertex_color.rgb *= model_vertex_l;
+#endif
+
+#ifdef V_RGB
+    clip_vertex_color.rgb *= model_vertex_rgb;
+#endif
+
+#ifdef V_A
+    clip_vertex_color.a *= model_vertex_a;
+#endif
+
+#ifdef U_RGBA
+    clip_vertex_color *= color;
+#endif
+
+#ifdef LIGHTING
+    clip_vertex_position = (model_matrix * vec4(model_vertex_position, 1.0)).xyz;
+    clip_vertex_normal = normalize(mat3(model_matrix) * model_vertex_normal);
+#endif
+
+#ifdef TEXTURE
+    clip_vertex_tex_coord = model_vertex_tex_coord;
+#endif
+}