Add ToT WebGL conformance tests : part 9

conformance/ogles/GL/mat/const_mat3_copy_frag.frag

+
+/*
+** 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 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);
+}
+