| |
| /* |
| ** Copyright (c) 2012 The Khronos Group Inc. |
| ** |
| ** Permission is hereby granted, free of charge, to any person obtaining a |
| ** copy of this software and/or associated documentation files (the |
| ** "Materials"), to deal in the Materials without restriction, including |
| ** without limitation the rights to use, copy, modify, merge, publish, |
| ** distribute, sublicense, and/or sell copies of the Materials, and to |
| ** permit persons to whom the Materials are 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 Materials. |
| ** |
| ** THE MATERIALS ARE 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 |
| ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. |
| */ |
| |
| |
| attribute vec4 gtf_Color; |
| attribute vec4 gtf_Vertex; |
| uniform mat4 gtf_ModelViewProjectionMatrix; |
| varying vec4 color; |
| |
| bvec2 lte(in ivec2 a, in ivec2 b) |
| { |
| bvec2 result; |
| if(a[0] <= b[0]) result[0] = true; |
| else result[0] = false; |
| if(a[1] <= b[1]) result[1] = true; |
| else result[1] = false; |
| return result; |
| } |
| |
| void main (void) |
| { |
| vec2 c = floor(10.0 * gtf_Color.rg - 4.5); // round to the nearest integer |
| vec2 result = vec2(lte(ivec2(c), ivec2(0))); |
| color = vec4(result, 0.0, 1.0); |
| gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; |
| } |