ccShader_ETC1AS_PositionTextureGray.frag 1.7 KB

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  1. /*
  2. * cocos2d for iPhone: http://www.cocos2d-iphone.org
  3. *
  4. * Copyright (c) 2011 Ricardo Quesada
  5. * Copyright (c) 2012 Zynga Inc.
  6. *
  7. * Permission is hereby granted, free of charge, to any person obtaining a copy
  8. * of this software and associated documentation files (the "Software"), to deal
  9. * in the Software without restriction, including without limitation the rights
  10. * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11. * copies of the Software, and to permit persons to whom the Software is
  12. * furnished to do so, subject to the following conditions:
  13. *
  14. * The above copyright notice and this permission notice shall be included in
  15. * all copies or substantial portions of the Software.
  16. *
  17. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20. * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21. * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22. * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23. * THE SOFTWARE.
  24. */
  25. const char* ccETC1ASPositionTextureGray_frag = R"(
  26. #ifdef GL_ES
  27. precision mediump float;
  28. #endif
  29. varying vec4 v_fragmentColor;
  30. varying vec2 v_texCoord;
  31. void main()
  32. {
  33. vec4 texColor = texture2D(CC_Texture0, v_texCoord);
  34. texColor.a = texture2D(CC_Texture1, v_texCoord).r;
  35. texColor.rgb *= texColor.a; // premultiply alpha channel
  36. texColor = v_fragmentColor * texColor;
  37. gl_FragColor.rgb = vec3(0.2126*texColor.r + 0.7152*texColor.g + 0.0722*texColor.b);
  38. gl_FragColor.a = texColor.a;
  39. }
  40. )";