SuperTuxKart 1.5 upstream source (from official release tarball)

data/shaders/sp_decal.frag

@@ -0,0 +1,29 @@
+in vec3 normal;
+in vec2 uv;
+in vec2 uv_two;
+
+layout(location = 0) out vec4 o_diffuse_color;
+layout(location = 1) out vec4 o_normal_color;
+
+#stk_include "utils/encode_normal.frag"
+#stk_include "utils/sp_texture_sampling.frag"
+
+void main(void)
+{
+    vec4 color = sampleTextureLayer0(uv);
+    vec4 layer_two_tex = sampleTextureLayer1(uv_two);
+    layer_two_tex.rgb = layer_two_tex.a * layer_two_tex.rgb;
+
+    vec3 final_color = layer_two_tex.rgb + color.rgb * (1.0 - layer_two_tex.a);
+
+#if defined(Advanced_Lighting_Enabled)
+    vec4 layer_2 = sampleTextureLayer2(uv);
+    o_diffuse_color = vec4(final_color, layer_2.z);
+
+    o_normal_color.xy = EncodeNormal(normalize(normal));
+    o_normal_color.zw = layer_2.xy;
+#else
+    o_diffuse_color = vec4(final_color, 1.0);
+#endif
+
+}