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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 // Function declarations. |
| 32 bvec4 function(in bvec4 par[3]); |
| 33 bool is_all(const in bvec4 par, const in bool value); |
| 34 bool is_all(const in bvec4 array[3], const in bvec4 value); |
| 35 void set_all(out bvec4 array[3], const in bvec4 value); |
| 36 |
| 37 void main (void) |
| 38 { |
| 39 bvec4 par[3]; |
| 40 bvec4 ret = bvec4(false, false, false, false); |
| 41 |
| 42 float gray = 0.0; |
| 43 |
| 44 // Initialize the entire array to true. |
| 45 set_all(par, bvec4(true, true, true, true)); |
| 46 |
| 47 ret = function(par); |
| 48 |
| 49 // The parameter should remain unchanged by the function and the functio
n should return true. |
| 50 if(is_all(par, bvec4(true, true, true, true)) && is_all(ret, true)) |
| 51 { |
| 52 gray = 1.0; |
| 53 } |
| 54 |
| 55 gl_FragColor = vec4(gray, gray, gray, 1.0); |
| 56 } |
| 57 |
| 58 // Function definitions. |
| 59 bvec4 function(in bvec4 par[3]) |
| 60 { |
| 61 // Return the value of the array. |
| 62 if(is_all(par, bvec4(true, true, true, true))) |
| 63 { |
| 64 // Test parameter qualifier (default is "in"). |
| 65 set_all(par, bvec4(false, false, false, false)); |
| 66 |
| 67 return bvec4(true, true, true, true); |
| 68 } |
| 69 else |
| 70 return bvec4(false, false, false, false); |
| 71 } |
| 72 |
| 73 bool is_all(const in bvec4 par, const in bool value) |
| 74 { |
| 75 bool ret = true; |
| 76 |
| 77 if(par[0] != value) |
| 78 ret = false; |
| 79 if(par[1] != value) |
| 80 ret = false; |
| 81 if(par[2] != value) |
| 82 ret = false; |
| 83 if(par[3] != value) |
| 84 ret = false; |
| 85 |
| 86 return ret; |
| 87 } |
| 88 |
| 89 bool is_all(const in bvec4 array[3], const in bvec4 value) |
| 90 { |
| 91 bool ret = true; |
| 92 |
| 93 if(array[0] != value) |
| 94 ret = false; |
| 95 if(array[1] != value) |
| 96 ret = false; |
| 97 if(array[2] != value) |
| 98 ret = false; |
| 99 |
| 100 return ret; |
| 101 } |
| 102 |
| 103 void set_all(out bvec4 array[3], const in bvec4 value) |
| 104 { |
| 105 array[0] = value; |
| 106 array[1] = value; |
| 107 array[2] = value; |
| 108 } |
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