SuperTuxKart 1.5 upstream source (from official release tarball)

data/shaders/ge_shaders/skybox.frag

@@ -0,0 +1,20 @@
+layout(location = 0) in vec2 f_uv;
+layout(binding = 2) uniform samplerCube f_skybox_texture;
+layout(binding = 3) uniform samplerCube f_skybox_texture_srgb;
+
+layout(location = 0) out vec4 o_color;
+
+#include "utils/camera.glsl"
+#include "utils/constants_utils.glsl"
+
+void main()
+{
+    vec2 uv = 2.0f * f_uv - 1.0f;
+    vec4 front = u_camera.m_inverse_projection_view_matrix * vec4(uv, -1.0, 1.0);
+    vec4 back = u_camera.m_inverse_projection_view_matrix * vec4(uv, 1.0, 1.0);
+    vec3 dir = back.xyz / back.w - front.xyz / front.w;
+    if (u_deferred)
+        o_color = texture(f_skybox_texture_srgb, dir);
+    else
+        o_color = texture(f_skybox_texture, dir);
+}