diff options
Diffstat (limited to 'dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/const_mat3_copy_frag.frag')
-rw-r--r-- | dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/const_mat3_copy_frag.frag | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/const_mat3_copy_frag.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/const_mat3_copy_frag.frag new file mode 100644 index 0000000000..68764145ac --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/const_mat3_copy_frag.frag @@ -0,0 +1,66 @@ + +/* +Copyright (c) 2019 The Khronos Group Inc. +Use of this source code is governed by an MIT-style license that can be +found in the LICENSE.txt file. +*/ + + +#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 constant 3 by 3 matrix with unique elements. + const mat3 a = mat3( 1.0, 2.0, 3.0, + 4.0, 5.0, 6.0, + 7.0, 8.0, 9.0); + + // Copy the constant matrix to another non-const matrix. + mat3 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] != 3.0) elms = false; + if(b[1][0] != 4.0) elms = false; + if(b[1][1] != 5.0) elms = false; + if(b[1][2] != 6.0) elms = false; + if(b[2][0] != 7.0) elms = false; + if(b[2][1] != 8.0) elms = false; + if(b[2][2] != 9.0) elms = false; + + // Add up each row of the copy. + bool rows = true; + x = b[0][0] + b[1][0] + b[2][0]; + if( x < 12.0-ERROR_EPSILON || x > 12.0+ERROR_EPSILON ) rows = false; + x = b[0][1] + b[1][1] + b[2][1]; + if(x < 15.0-ERROR_EPSILON || x > 15.0+ERROR_EPSILON ) rows = false; + x = b[0][2] + b[1][2] + b[2][2]; + if(x < 18.0-ERROR_EPSILON || x > 18.0+ERROR_EPSILON ) rows = false; + + // Add up each column of the copy. + bool cols = true; + x = b[0][0] + b[0][1] + b[0][2]; + if( x < 6.0-ERROR_EPSILON || x > 6.0+ERROR_EPSILON ) cols = false; + x = b[1][0] + b[1][1] + b[1][2]; + if(x < 15.0-ERROR_EPSILON || x > 15.0+ERROR_EPSILON) cols = false; + x = b[2][0] + b[2][1] + b[2][2]; + if(x < 24.0-ERROR_EPSILON || x > 24.0+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); +} + |