SuperTuxKart 1.5 upstream source (from official release tarball)

data/shaders/ge_shaders/decal.frag

@@ -0,0 +1,41 @@
+layout(location = 1) in vec2 f_uv;
+layout(location = 2) in vec2 f_uv_two;
+layout(location = 3) flat in int f_material_id;
+#ifdef PBR_ENABLED
+layout(location = 5) in vec3 f_normal;
+layout(location = 8) in vec4 f_world_position;
+#endif
+
+layout(location = 0) out vec4 o_color;
+
+#include "utils/sample_mesh_texture.glsl"
+#ifdef PBR_ENABLED
+#include "utils/handle_pbr.glsl"
+#include "../utils/encode_normal.frag"
+layout(location = 1) out vec4 o_normal;
+#endif
+
+void main()
+{
+    vec4 color = sampleMeshTexture0(f_material_id, f_uv);
+    vec4 layer_two_tex = sampleMeshTexture1(f_material_id, f_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);
+#ifndef PBR_ENABLED
+    o_color = vec4(final_color, 1.0);
+#else
+    vec3 normal = normalize(f_normal.xyz);
+    vec3 pbr = sampleMeshTexture2(f_material_id, f_uv).xyz;
+    if (u_deferred)
+    {
+        o_color = vec4(final_color, pbr.z);
+        o_normal.xy = EncodeNormal(normal);
+        o_normal.zw = pbr.xy;
+    }
+    else
+    {
+        o_color = vec4(handlePBR(final_color, pbr, f_world_position, normal),
+            1.0);
+    }
+#endif
+}