System info & network

shaders/2d.frag

@@ -0,0 +1,38 @@
+#version 430 core
+
+in Fragment
+{
+	// @Performance: Are this fields aligned to vec4? Is it better to reorder them?
+	vec2 position;
+	vec4 color;
+	vec2 uv;
+} frag;
+
+uniform int width;  // Width  of the screen in pixels
+uniform int height; // Height of the screen in pixels
+
+uniform int has_texture0;
+uniform sampler2D texture0;
+uniform int texture_channels0;
+uniform vec4 color0;
+
+out vec4 FragColor;
+
+void main()
+{
+	FragColor = frag.color;
+
+	if(has_texture0 != 0)
+	{
+		vec4 texture_color;
+		if(texture_channels0 == 1)
+			texture_color = vec4(1.0, 1.0, 1.0, texture(texture0, frag.uv).r);
+		else if(texture_channels0 == 3)
+			texture_color = vec4(texture(texture0, frag.uv).rgb, 1.0);
+		else
+			texture_color = texture(texture0, frag.uv);
+
+		FragColor = color0 * frag.color * texture_color;
+		FragColor.rgb *= FragColor.a; // Premultiplied alpha
+	}
+}