lcd1x_sharp.vsh

/*
	lcd1x_sharp shader
	
	This is an attempt to make a shader with a non-blurry LCD effect.
	It combines the existing shader code:
	
	- Nearest neighbour scaling, taken from zfast_lcd
	  [Original code copyright (C) 2017 Greg Hogan (SoltanGris42)]
	
	- lcd3x 'grille effect', but without colour seperation
	  [Original code by Gigaherz, released into the public domain]
	  [Code here derived from PPSSPP version of lcd3x made by LunaMoo]
	
	Code mashed together by jdgleaver...
	
	This program is free software; you can redistribute it and/or modify it
	under the terms of the GNU General Public License as published by the Free
	Software Foundation; either version 2 of the License, or (at your option)
	any later version.
	
	*** Requires rendering resolution to be set to 1xPSP
	
	*** Surprisingly, looks reasonably good on low resolution (720p/768p)
	    displays...
*/

uniform vec2 u_texelDelta;
attribute vec4 a_position;
attribute vec2 a_texcoord0;
varying vec2 v_texcoord0;

// Have to use standard names to ensure compatibility with
// Vulkan backend...
varying vec2 v_texcoord1; // TextureSize

void main()
{
	v_texcoord0 = a_texcoord0;
	gl_Position = a_position;
	v_texcoord1 = 1.0 / u_texelDelta.xy; // TextureSize
}