renderer now uses a single pipeline for ugui

resources/shaders/source/ugui.vert.glsl

@@ -0,0 +1,47 @@
+#version 450
+
+/* Combined vertex shader to render UGUI commands */
+
+// Viewport size in pixels
+layout(set = 1, binding = 0) uniform Viewport {
+	ivec2 view;
+};
+
+// inputs
+layout(location = 0) in ivec2 in_position;
+layout(location = 1) in ivec4 in_attr; // quad x,y,w,h
+layout(location = 2) in ivec2 in_uv;
+layout(location = 3) in uvec4 in_color;
+layout(location = 4) in uint  in_type;
+
+// outputs
+layout(location = 0) out vec4  out_color;
+layout(location = 1) out vec2  out_uv;
+layout(location = 2) out vec4  out_quad_size;
+layout(location = 3) out float out_radius;
+layout(location = 4) out uint  out_type;
+
+
+void main()
+{
+	// vertex position
+	ivec2 px_pos = in_attr.xy + in_position.xy * in_attr.zw;
+	vec2 clip_pos;
+	clip_pos.x = float(px_pos.x)*2.0 / view.x - 1.0;
+	clip_pos.y = -(float(px_pos.y)*2.0 / view.y - 1.0);
+	gl_Position = vec4(clip_pos, 0.0, 1.0);
+
+	// color output
+	out_color = vec4(in_color) / 255.0;
+
+	// uv output. only useful if the type is SPRITE
+	vec2 px_uv = in_uv.xy + in_position.xy * in_attr.zw;
+	out_uv = vec2(px_uv);
+
+	// quad size and radius output, only useful if type is RECT
+	out_quad_size = vec4(in_attr);
+	out_radius = float(abs(in_uv.x));
+
+	// type output
+	out_type = in_type;
+}