render boxes

text_rendering/box_vertshader.glsl

@@ -0,0 +1,19 @@
+#version 330 core
+
+uniform ivec2 viewsize;
+
+layout(location = 0) in vec2 position;
+layout(location = 2) in vec4 color;
+
+out vec4 col;
+
+
+void main()
+{
+	vec2 v = vec2(float(viewsize.x), float(viewsize.y));
+	vec2 p = vec2(position.x*2.0/v.x - 1.0, 1.0 - position.y*2.0/v.y);
+	vec4 pos = vec4(p.x, p.y, 0.0f, 1.0f);
+
+	gl_Position = pos;
+	col = color;
+}