fixed minor regression, cleaned up source tree

resources/shaders/color-passthrough.fragment

@@ -0,0 +1,21 @@
+#version 450
+layout(location = 0) in vec2 tex_coords;
+layout(location = 1) in vec4 out_color;
+
+layout(location = 0) out vec4 f_color;
+
+layout(set = 0, binding = 0) uniform sampler2D tex;
+layout(set = 0, binding = 1, rgba32ui) readonly uniform uimage2D img;
+
+void main() {
+
+    ivec2 pos = ivec2(gl_FragCoord.x, gl_FragCoord.y);
+
+    f_color = imageLoad(img, ivec2(pos)) / (255.0);
+
+    float gamma = 0.5;
+    f_color.rgb = pow(f_color.rgb, vec3(1.0/gamma));
+
+    //f_color = out_color;
+    //  f_color = texture(tex, tex_coords);
+}