diff options
Diffstat (limited to 'dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/mat4_frag.frag')
| -rw-r--r-- | dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/mat4_frag.frag | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/mat4_frag.frag b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/mat4_frag.frag new file mode 100644 index 0000000000..92c3f7c890 --- /dev/null +++ b/dom/canvas/test/webgl-conf/checkout/conformance/ogles/GL/mat/mat4_frag.frag @@ -0,0 +1,75 @@ + +/* +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 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); +} + |