Index: conformance/ogles/GL/mat/mat4_frag.frag |
=================================================================== |
--- conformance/ogles/GL/mat/mat4_frag.frag (revision 0) |
+++ conformance/ogles/GL/mat/mat4_frag.frag (working copy) |
@@ -0,0 +1,92 @@ |
+ |
+/* |
+** 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. |
+*/ |
+ |
+ |
+#ifdef GL_ES |
+precision mediump float; |
+#endif |
+ |
+/* This epsilon will work as long as the magnitude of the float is < 128. |
+ * This can be seen by taking the spec relative mediump precision of 2^-10: |
+ * 0.125 / 2^-10 = 128 |
+ */ |
+#define ERROR_EPSILON (0.125) |
+ |
+void main (void) |
+{ |
+ float x; |
+ // Declare a 4 by 4 matrix with unique elements. |
+ mat4 a = mat4( 1.0, 2.0, 3.0, 4.0, |
+ 5.0, 6.0, 7.0, 8.0, |
+ 9.0, 10.0, 11.0, 12.0, |
+ 13.0, 14.0, 15.0, 16.0); |
+ |
+ // Check each element. |
+ bool elms = true; |
+ if(a[0][0] != 1.0) elms = false; |
+ if(a[0][1] != 2.0) elms = false; |
+ if(a[0][2] != 3.0) elms = false; |
+ if(a[0][3] != 4.0) elms = false; |
+ if(a[1][0] != 5.0) elms = false; |
+ if(a[1][1] != 6.0) elms = false; |
+ if(a[1][2] != 7.0) elms = false; |
+ if(a[1][3] != 8.0) elms = false; |
+ if(a[2][0] != 9.0) elms = false; |
+ if(a[2][1] != 10.0) elms = false; |
+ if(a[2][2] != 11.0) elms = false; |
+ if(a[2][3] != 12.0) elms = false; |
+ if(a[3][0] != 13.0) elms = false; |
+ if(a[3][1] != 14.0) elms = false; |
+ if(a[3][2] != 15.0) elms = false; |
+ if(a[3][3] != 16.0) elms = false; |
+ |
+ // Add up each row. |
+ bool rows = true; |
+ x = a[0][0] + a[1][0] + a[2][0] + a[3][0]; |
+ if(x < 28.0-ERROR_EPSILON || x > 28.0+ERROR_EPSILON) rows = false; |
+ x = a[0][1] + a[1][1] + a[2][1] + a[3][1]; |
+ if(x < 32.0-ERROR_EPSILON || x > 32.0+ERROR_EPSILON) rows = false; |
+ x = a[0][2] + a[1][2] + a[2][2] + a[3][2]; |
+ if(x < 36.0-ERROR_EPSILON || x > 36.0+ERROR_EPSILON) rows = false; |
+ x = a[0][3] + a[1][3] + a[2][3] + a[3][3]; |
+ if(x < 40.0-ERROR_EPSILON || x > 40.0+ERROR_EPSILON) rows = false; |
+ |
+ // Add up each column of the copy. |
+ bool cols = true; |
+ x = a[0][0] + a[0][1] + a[0][2] + a[0][3]; |
+ if(x < 10.0-ERROR_EPSILON || x > 10.0+ERROR_EPSILON) cols = false; |
+ x = a[1][0] + a[1][1] + a[1][2] + a[1][3]; |
+ if(x < 26.0-ERROR_EPSILON || x > 26.0+ERROR_EPSILON) cols = false; |
+ x = a[2][0] + a[2][1] + a[2][2] + a[2][3]; |
+ if(x < 42.0-ERROR_EPSILON || x > 42.0+ERROR_EPSILON) cols = false; |
+ x = a[3][0] + a[3][1] + a[3][2] + a[3][3]; |
+ if(x < 58.0-ERROR_EPSILON || x > 58.0+ERROR_EPSILON) cols = false; |
+ |
+ // Check if all of the operations were successful. |
+ float gray = elms && rows && cols ? 1.0 : 0.0; |
+ |
+ // Assign the fragment color. |
+ gl_FragColor = vec4(gray, gray, gray, 1.0); |
+} |
+ |