1/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2/*
3 * This file is part of the LibreOffice project.
4 *
5 * This Source Code Form is subject to the terms of the Mozilla Public
6 * License, v. 2.0. If a copy of the MPL was not distributed with this
7 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 */
9
10#version 130
11
12uniform sampler2D slideTexture;
13varying float v_isShadow;
14varying vec2 v_texturePosition;
15varying vec3 v_normal;
16
17void main() {
18    vec3 lightVector = vec3(0.0, 0.0, 1.0);
19    float light = max(dot(lightVector, v_normal), 0.0);
20    vec4 fragment = texture2D(slideTexture, v_texturePosition);
21    vec4 black = vec4(0.0, 0.0, 0.0, fragment.a);
22    fragment = mix(black, fragment, light);
23
24    if (v_isShadow > 0.5) {
25        if (v_texturePosition.y > 1.0 - 0.3)
26            gl_FragColor = mix(fragment, vec4(0.0, 0.0, 0.0, 0.0), (1.0 - v_texturePosition.y) / 0.3);
27        else
28            discard;
29    } else {
30        gl_FragColor = fragment;
31    }
32}
33
34/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
35