store color in linear

src/render/shader.wgsl

@@ -106,7 +106,7 @@ fn draw_texture(region: Region, info: TextureInfo) -> vec4<f32> {
 }
 
 fn draw_rounded_rect(region: Region, rect: Rect) -> vec4<f32> {
-    var color = read_color(rect.color);
+    var color = unpack4x8unorm(rect.color);
 
     let edge = 0.5;
 
@@ -133,20 +133,3 @@ fn distance_from_rect(pixel_pos: vec2<f32>, rect_center: vec2<f32>, rect_corner:
     return length(max(q, vec2(0.0))) - radius;
 }
 
-fn read_color(c: u32) -> vec4<f32> {
-    let color = unpack4x8unorm(c);
-    return vec4(
-        srgb_to_linear(color.r),
-        srgb_to_linear(color.g),
-        srgb_to_linear(color.b),
-        color.a,
-    );
-}
-
-fn srgb_to_linear(c: f32) -> f32 {
-    if c <= 0.04045 {
-        return c / 12.92;
-    } else {
-        return pow((c + 0.055) / 1.055, 2.4);
-    }
-}