34 lines
1 KiB
GLSL
34 lines
1 KiB
GLSL
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#version 130
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uniform sampler2D slideTexture;
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varying float v_isShadow;
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varying vec2 v_texturePosition;
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varying vec3 v_normal;
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void main() {
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vec3 lightVector = vec3(0.0, 0.0, 1.0);
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float light = max(dot(lightVector, v_normal), 0.0);
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vec4 fragment = texture2D(slideTexture, v_texturePosition);
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vec4 black = vec4(0.0, 0.0, 0.0, fragment.a);
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fragment = mix(black, fragment, light);
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if (v_isShadow > 0.5) {
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if (v_texturePosition.y > 1.0 - 0.3)
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gl_FragColor = mix(fragment, vec4(0.0, 0.0, 0.0, 0.0), (1.0 - v_texturePosition.y) / 0.3);
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else
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discard;
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} else {
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gl_FragColor = fragment;
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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