| |
| /* |
| ** 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_Vertex; |
| uniform mat4 gtf_ModelViewProjectionMatrix; |
| varying vec4 color; |
| |
| #define ERROR_EPSILON 0.1 |
| |
| void main (void) |
| { |
| float x; |
| // Declare a 4 by 4 matrix with unique elements. |
| mat4 a = mat4( 1.0, 2.0, 4.0, 8.0, // 1.0 16.0 256.0 4096.0 |
| 16.0, 32.0, 64.0, 128.0, // 2.0 32.0 512.0 8192.0 |
| 256.0, 512.0, 1024.0, 2048.0, // 4.0 64.0 1024.0 16384.0 |
| 4096.0, 8192.0, 16384.0, 32768.0); // 8.0 128.0 2048.0 32768.0 |
| |
| // Copy the matrix to another non-const matrix. |
| mat4 b = a; |
| |
| // Check each element of the copy. |
| bool elms = true; |
| if(b[0][0] != 1.0) elms = false; |
| if(b[0][1] != 2.0) elms = false; |
| if(b[0][2] != 4.0) elms = false; |
| if(b[0][3] != 8.0) elms = false; |
| if(b[1][0] != 16.0) elms = false; |
| if(b[1][1] != 32.0) elms = false; |
| if(b[1][2] != 64.0) elms = false; |
| if(b[1][3] != 128.0) elms = false; |
| if(b[2][0] != 256.0) elms = false; |
| if(b[2][1] != 512.0) elms = false; |
| if(b[2][2] != 1024.0) elms = false; |
| if(b[2][3] != 2048.0) elms = false; |
| if(b[3][0] != 4096.0) elms = false; |
| if(b[3][1] != 8192.0) elms = false; |
| if(b[3][2] != 16384.0) elms = false; |
| if(b[3][3] != 32768.0) elms = false; |
| |
| // Add up each row of the copy. |
| bool rows = true; |
| x = b[0][0] + b[1][0] + b[2][0] + b[3][0]; |
| if(x < 4369.0-ERROR_EPSILON || x > 4369.0+ERROR_EPSILON) rows = false; |
| x = b[0][1] + b[1][1] + b[2][1] + b[3][1]; |
| if(x < 8738.0-ERROR_EPSILON || x > 8738.0+ERROR_EPSILON) rows = false; |
| x = b[0][2] + b[1][2] + b[2][2] + b[3][2]; |
| if(x < 17476.0-ERROR_EPSILON || x > 17476.0+ERROR_EPSILON) rows = false; |
| x = b[0][3] + b[1][3] + b[2][3] + b[3][3]; |
| if(x < 34952.0-ERROR_EPSILON || x > 34952.0+ERROR_EPSILON) rows = false; |
| |
| // Add up each column of the copy. |
| bool cols = true; |
| x = b[0][0] + b[0][1] + b[0][2] + b[0][3]; |
| if(x < 15.0-ERROR_EPSILON || x > 15.0+ERROR_EPSILON) cols = false; |
| x = b[1][0] + b[1][1] + b[1][2] + b[1][3]; |
| if(x < 240.0-ERROR_EPSILON || x > 240.0+ERROR_EPSILON) cols = false; |
| x = b[2][0] + b[2][1] + b[2][2] + b[2][3]; |
| if(x < 3840.0-ERROR_EPSILON || x > 3840.0+ERROR_EPSILON) cols = false; |
| x = b[3][0] + b[3][1] + b[3][2] + b[3][3]; |
| if(x < 61440.0-ERROR_EPSILON || x > 61440.0+ERROR_EPSILON) cols = false; |
| |
| // Check if all of the operations were successful. |
| float gray = elms && rows && cols ? 1.0 : 0.0; |
| |
| // Assign the varying variable color. |
| color = vec4(gray, gray, gray, 1.0); |
| |
| // Transform the vertex position. |
| gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex; |
| } |
| |