diff options
Diffstat (limited to 'vcl/opengl/blendedTextureFragmentShader.glsl')
| -rw-r--r-- | vcl/opengl/blendedTextureFragmentShader.glsl | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/vcl/opengl/blendedTextureFragmentShader.glsl b/vcl/opengl/blendedTextureFragmentShader.glsl new file mode 100644 index 000000000000..b46f6ce5fb9d --- /dev/null +++ b/vcl/opengl/blendedTextureFragmentShader.glsl @@ -0,0 +1,27 @@ +/* -*- 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/. + */ + +varying vec2 tex_coord; +varying vec2 alpha_coord; +uniform sampler2D sampler; +uniform sampler2D mask; +uniform sampler2D alpha; + +void main() { + vec4 texel0, texel1, texel2; + texel0 = texture2D(sampler, tex_coord); + texel1 = texture2D(mask, tex_coord); + texel2 = texture2D(alpha, alpha_coord); + gl_FragColor = texel0; + + /* Only blend if the the alpha texture wasn't fully transparent */ + gl_FragColor.a = 1.0 - (1.0 - floor(texel2.r)) * texel1.r; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |