UI: Add icon color saturation preference

Toolbar icon saturation can now be set from the preferences,
(use 0.4 by default).

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/gpu/shaders/gpu_shader_image_desaturate_frag.glsl b/source/blender/gpu/shaders/gpu_shader_image_desaturate_frag.glsl
index 5b2ccb8ff3a..1ac0d68b35f 100644
--- a/source/blender/gpu/shaders/gpu_shader_image_desaturate_frag.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_image_desaturate_frag.glsl
@@ -1,4 +1,5 @@
 
+uniform float factor;
 in vec2 texCoord_interp;
 out vec4 fragColor;
 
@@ -8,6 +9,6 @@ uniform sampler2D image;
 void main()
 {
 	vec4 tex = texture(image, texCoord_interp);
-	tex.rgb = 0.3333333 * vec3(tex.r + tex.g + tex.b);
+	tex.rgb = ((0.3333333 * factor) * vec3(tex.r + tex.g + tex.b)) + (tex.rgb * (1.0 - factor));
 	fragColor = tex * color;
 }