1 files changed, 44 insertions, 0 deletions
diff --git a/src/extras/shaders/rhi/skybox.frag b/src/extras/shaders/rhi/skybox.frag
new file mode 100644
index 000000000..649894b15
--- /dev/null
+++ b/src/extras/shaders/rhi/skybox.frag
@@ -0,0 +1,44 @@
+#version 450
+
+layout(location = 0) in vec3 texCoord0;
+layout(location = 0) out vec4 fragColor;
+
+
+// Gamma correction
+
+layout(std140, binding = 0) uniform qt3d_render_view_uniforms {
+  mat4 viewMatrix;
+  mat4 projectionMatrix;
+  mat4 viewProjectionMatrix;
+  mat4 inverseViewMatrix;
+  mat4 inverseProjectionMatrix;
+  mat4 inverseViewProjectionMatrix;
+  mat4 viewportMatrix;
+  mat4 inverseViewportMatrix;
+  vec4 textureTransformMatrix;
+  vec3 eyePosition;
+  float aspectRatio;
+  float gamma;
+  float exposure;
+  float time;
+};
+
+layout(std140, binding = 2) uniform qt3d_morph_uniforms {
+  float gammaStrength;
+};
+
+layout(binding = 3) uniform samplerCube skyboxTexture;
+
+vec3 gammaCorrect(const in vec3 color)
+{
+    return pow(color, vec3(1.0 / gamma));
+}
+
+void main()
+{
+    vec4 baseColor = texture(skyboxTexture, texCoord0);
+    vec4 gammaColor = vec4(gammaCorrect(baseColor.rgb), 1.0);
+    // This is an odd way to enable or not gamma correction,
+    // but this is a way to avoid branching until we can generate shaders
+    fragColor = mix(baseColor, gammaColor, gammaStrength);
+}