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- /*
- * cocos2d for iPhone: http://www.cocos2d-iphone.org
- *
- * Copyright (c) 2011 Ricardo Quesada
- * Copyright (c) 2012 Zynga Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
- #include "ccParamIO.glsl"
-
- #ifdef OPENGL_ES
- precision lowp float;
- #endif
-
- varying vec2 v_texCoord;
-
- void main()
- {
- gl_FragColor = texture2D(CC_Texture0, v_texCoord);
- // ±ä»Ò
- #ifdef GREY
- // Convert to greyscale using NTSC weightings
- float grey = dot(gl_FragColor.rgb, vec3(0.299, 0.587, 0.114));
- gl_FragColor.rgb = vec3(grey, grey, grey);
- #endif
-
- }
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