mirror of https://github.com/axmolengine/axmol.git
48 lines
1.6 KiB
GLSL
48 lines
1.6 KiB
GLSL
/*
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* cocos2d for iPhone: http://www.cocos2d-iphone.org
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*
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* Copyright (c) 2011 Brian Chapados
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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const char* ccPositionTextureColorAlphaTest_frag = STRINGIFY(
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\n#ifdef GL_ES\n
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precision lowp float;
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\n#endif\n
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varying vec4 v_fragmentColor;
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varying vec2 v_texCoord;
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uniform float CC_alpha_value;
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void main()
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{
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vec4 texColor = texture2D(CC_Texture0, v_texCoord);
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\n// mimic: glAlphaFunc(GL_GREATER)
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\n// pass if ( incoming_pixel >= CC_alpha_value ) => fail if incoming_pixel < CC_alpha_value\n
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if ( texColor.a <= CC_alpha_value )
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discard;
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gl_FragColor = texColor * v_fragmentColor;
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}
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);
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