System info & network

shaders/2d.vert

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+#version 430 core
+
+layout (location = 0) in vec2 position;
+layout (location = 1) in vec4 color;
+layout (location = 2) in vec2 uv;
+
+out 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
+
+void main()
+{
+	frag.position = position;
+	frag.color = color;
+	frag.uv = uv;
+
+	vec2 screen = vec2(width, height);
+
+	vec2 p = position / screen * 2.0 - 1.0; // Position relative to the screen size, in range [-1,+1)
+	p.y = -p.y; // OpenGL coordinates have y up, pixel coordinates have y down
+
+	gl_Position = vec4(p, 0.0, 1.0);
+}