diff options
Diffstat (limited to 'dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/const_mat2_frag.frag')
-rw-r--r-- | dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/const_mat2_frag.frag | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/const_mat2_frag.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/const_mat2_frag.frag new file mode 100644 index 0000000000..d827f2a666 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/const_mat2_frag.frag @@ -0,0 +1,53 @@ + +/* +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 2 by 2 matrix with unique elements. + const mat2 a = mat2(1.0, 2.0, // 1.0 4.0 + 4.0, 8.0); // 2.0 8.0 + + // Check each element. + bool elms = true; + if(a[0][0] != 1.0) elms = false; + if(a[0][1] != 2.0) elms = false; + if(a[1][0] != 4.0) elms = false; + if(a[1][1] != 8.0) elms = false; + + // Add up each row. + bool rows = true; + x = a[0][0] + a[1][0]; + if(x < 5.0-ERROR_EPSILON || x > 5.0+ERROR_EPSILON) rows = false; + x = a[0][1] + a[1][1]; + if(x < 10.0-ERROR_EPSILON || x > 10.0+ERROR_EPSILON) rows = false; + + // Add up each column. + bool cols = true; + x = a[0][0] + a[0][1]; + if(x < 3.0-ERROR_EPSILON || x > 3.0+ERROR_EPSILON) cols = false; + x = a[1][0] + a[1][1]; + if(x < 12.0-ERROR_EPSILON || x > 12.0+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); +} + |