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| 1 |
| 2 /* |
| 3 ** Copyright (c) 2012 The Khronos Group Inc. |
| 4 ** |
| 5 ** Permission is hereby granted, free of charge, to any person obtaining a |
| 6 ** copy of this software and/or associated documentation files (the |
| 7 ** "Materials"), to deal in the Materials without restriction, including |
| 8 ** without limitation the rights to use, copy, modify, merge, publish, |
| 9 ** distribute, sublicense, and/or sell copies of the Materials, and to |
| 10 ** permit persons to whom the Materials are furnished to do so, subject to |
| 11 ** the following conditions: |
| 12 ** |
| 13 ** The above copyright notice and this permission notice shall be included |
| 14 ** in all copies or substantial portions of the Materials. |
| 15 ** |
| 16 ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 17 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 18 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 19 ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 20 ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 21 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 22 ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. |
| 23 */ |
| 24 |
| 25 |
| 26 #ifdef GL_ES |
| 27 precision mediump float; |
| 28 #endif |
| 29 varying vec4 color; |
| 30 |
| 31 vec3 floor_ref(vec3 x) |
| 32 { |
| 33 if(x[0] >= 0.0) |
| 34 x[0] = float(int(x[0])); |
| 35 else |
| 36 x[0] = float(int(x[0]) - 1); |
| 37 if(x[1] >= 0.0) |
| 38 x[1] = float(int(x[1])); |
| 39 else |
| 40 x[1] = float(int(x[1]) - 1); |
| 41 if(x[2] >= 0.0) |
| 42 x[2] = float(int(x[2])); |
| 43 else |
| 44 x[2] = float(int(x[2]) - 1); |
| 45 return x; |
| 46 } |
| 47 |
| 48 void main (void) |
| 49 { |
| 50 vec3 c = 10.0 * 2.0 * (color.rgb - 0.5); |
| 51 gl_FragColor = vec4((floor_ref(c) + 10.0) / 20.0, 1.0); |
| 52 } |
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