stuff

modules/wallpaper-engine/shaders/brushinvert.frag

@@ -0,0 +1,16 @@
+
+uniform sampler2D g_Texture0;
+
+varying vec3 g_ScreenPosition;
+
+void main() {
+	
+	vec2 texCoords = g_ScreenPosition.xy / g_ScreenPosition.z;
+	texCoords = texCoords * vec2(0.5, -0.5) + 0.5;
+	vec4 sample = texSample2D(g_Texture0, texCoords);
+
+	float lightness = dot(sample.rgb, vec3(0.3, 0.59, 0.11));
+	float color = step(lightness, 0.5);
+
+	gl_FragColor = vec4(vec3(1, 1, 1) * color, 1.0);
+}