SuperTuxKart 1.5 upstream source (from official release tarball)

data/shaders/ge_shaders/normalmap.frag

@@ -0,0 +1,69 @@
+layout(location = 0) in vec4 f_vertex_color;
+layout(location = 1) in vec2 f_uv;
+layout(location = 3) flat in int f_material_id;
+layout(location = 4) in float f_hue_change;
+#ifdef PBR_ENABLED
+layout(location = 5) in vec3 f_normal;
+layout(location = 6) in vec3 f_tangent;
+layout(location = 7) in vec3 f_bitangent;
+layout(location = 8) in vec4 f_world_position;
+#endif
+
+layout(location = 0) out vec4 o_color;
+
+#include "utils/sample_mesh_texture.glsl"
+#include "../utils/rgb_conversion.frag"
+#ifdef PBR_ENABLED
+#include "utils/handle_pbr.glsl"
+#include "../utils/encode_normal.frag"
+layout(location = 1) out vec4 o_normal;
+#endif
+
+void main()
+{
+    vec4 tex_color = sampleMeshTexture0(f_material_id, f_uv);
+
+    if (f_hue_change > 0.0)
+    {
+        float mask = tex_color.a;
+        vec3 old_hsv = rgbToHsv(tex_color.rgb);
+        float mask_step = step(mask, 0.5);
+#ifndef PBR_ENABLED
+        // For similar color
+        float saturation = mask * 1.825; // 2.5 * 0.5 ^ (1. / 2.2)
+#else
+        float saturation = mask * 2.5;
+#endif
+        vec2 new_xy = mix(vec2(old_hsv.x, old_hsv.y), vec2(f_hue_change,
+            max(old_hsv.y, saturation)), vec2(mask_step, mask_step));
+        vec3 new_color = hsvToRgb(vec3(new_xy.x, new_xy.y, old_hsv.z));
+        tex_color = vec4(new_color.r, new_color.g, new_color.b, 1.0);
+    }
+#ifndef PBR_ENABLED
+    vec3 mixed_color = tex_color.xyz * f_vertex_color.xyz;
+    o_color = vec4(mixed_color, 1.0);
+#else
+    vec3 diffuse_color = tex_color.xyz * f_vertex_color.xyz;
+
+    vec4 layer_3 = sampleMeshTexture3(f_material_id, f_uv);
+    vec3 tangent_space_normal = 2.0 * layer_3.xyz - 1.0;
+    vec3 frag_tangent = normalize(f_tangent);
+    vec3 frag_bitangent = normalize(f_bitangent);
+    vec3 frag_normal = normalize(f_normal);
+    mat3 t_b_n = mat3(frag_tangent, frag_bitangent, frag_normal);
+
+    vec3 normal = normalize(t_b_n * tangent_space_normal);
+    vec3 pbr = sampleMeshTexture2(f_material_id, f_uv).xyz;
+    if (u_deferred)
+    {
+        o_color = vec4(diffuse_color, pbr.z);
+        o_normal.xy = EncodeNormal(normal);
+        o_normal.zw = pbr.xy;
+    }
+    else
+    {
+        o_color = vec4(handlePBR(diffuse_color, pbr, f_world_position, normal),
+            1.0);
+    }
+#endif
+}