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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#version 120
uniform sampler2D leavingSlideTexture;
uniform sampler2D enteringSlideTexture;
uniform float time;
varying vec2 v_texturePosition;
void main() {
vec4 black = vec4(0.0, 0.0, 0.0, 1.0);
vec4 texel;
float amount;
if (time < 0.5) {
texel = texture2D(leavingSlideTexture, v_texturePosition);
amount = time * 2;
} else {
texel = texture2D(enteringSlideTexture, v_texturePosition);
amount = (1.0 - time) * 2;
}
gl_FragColor = mix(texel, black, amount);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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