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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 attribute vec4 gtf_Vertex; |
| 27 uniform mat4 gtf_ModelViewProjectionMatrix; |
| 28 varying vec4 color; |
| 29 |
| 30 // Function declarations. |
| 31 bool function(in bool par[3]); |
| 32 bool is_all(const in bool array[3], const in bool value); |
| 33 void set_all(out bool array[3], const in bool value); |
| 34 |
| 35 void main (void) |
| 36 { |
| 37 bool par[3]; |
| 38 bool ret = false; |
| 39 |
| 40 float gray = 0.0; |
| 41 |
| 42 // Initialize the entire array to true. |
| 43 set_all(par, true); |
| 44 |
| 45 ret = function(par); |
| 46 |
| 47 // The parameter should remain unchanged by the function and the functio
n should return true. |
| 48 if(is_all(par, true) && ret) |
| 49 { |
| 50 gray = 1.0; |
| 51 } |
| 52 |
| 53 color = vec4(gray, gray, gray, 1.0); |
| 54 gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; |
| 55 } |
| 56 |
| 57 // Function definition. |
| 58 bool function(in bool par[3]) |
| 59 { |
| 60 // Return the value of the array. |
| 61 if(is_all(par, true)) |
| 62 { |
| 63 // Test parameter qualifier (default is "in"). |
| 64 set_all(par, false); |
| 65 |
| 66 return true; |
| 67 } |
| 68 else |
| 69 return false; |
| 70 } |
| 71 |
| 72 bool is_all(const in bool array[3], const in bool value) |
| 73 { |
| 74 bool ret = true; |
| 75 |
| 76 if(array[0] != value) |
| 77 ret = false; |
| 78 if(array[1] != value) |
| 79 ret = false; |
| 80 if(array[2] != value) |
| 81 ret = false; |
| 82 |
| 83 return ret; |
| 84 } |
| 85 |
| 86 void set_all(out bool array[3], const in bool value) |
| 87 { |
| 88 array[0] = value; |
| 89 array[1] = value; |
| 90 array[2] = value; |
| 91 } |
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