view shaders/default.f.glsl @ 1466:f2ee46d08b01

Push correct PC onto stack on divide by zero for pc-relative case
author Michael Pavone <pavone@retrodev.com>
date Wed, 13 Sep 2017 21:13:11 -0700
parents 957325c990d5
children fa9ae059e4d3
line wrap: on
line source

#version 110

uniform sampler2D textures[2];

varying vec2 texcoord;

void main()
{
	vec2 modifiedCoord0 = vec2(texcoord.x, (floor(texcoord.y * 512.0 + 0.25) + 0.5)/512.0);
	vec2 modifiedCoord1 = vec2(texcoord.x, (floor(texcoord.y * 512.0 - 0.25) + 0.5)/512.0);
	gl_FragColor = mix(
		texture2D(textures[1], modifiedCoord1),
		texture2D(textures[0], modifiedCoord0),
		(sin(texcoord.y * 1024.0 * 3.14159265359) + 1.0) * 0.5
	);
}