1 files changed, 11 insertions, 0 deletions
diff --git a/source/blender/gpu/shaders/gpu_shader_material.glsl b/source/blender/gpu/shaders/gpu_shader_material.glsl
index 45e7831d20d..8fc18bf8726 100644
--- a/source/blender/gpu/shaders/gpu_shader_material.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_material.glsl
@@ -390,6 +390,17 @@ void set_rgba_zero(out vec4 outval)
 	outval = vec4(0.0);
 }
 
+void brightness_contrast(vec4 col, float brightness, float contrast, out vec4 outcol)
+{
+	float a = 1.0 + contrast;
+	float b = brightness - contrast*0.5;
+
+	outcol.r = max(a*col.r + b, 0.0);
+	outcol.g = max(a*col.g + b, 0.0);
+	outcol.b = max(a*col.b + b, 0.0);
+	outcol.a = col.a;
+}
+
 void mix_blend(float fac, vec4 col1, vec4 col2, out vec4 outcol)
 {
 	fac = clamp(fac, 0.0, 1.0);