Add test fixture for GPU browser tests which do image comparisons....

chrome/test/data/gpu/webgl_teapot/teapot_files/matrix4x4.js

+/*
+ * Copyright (c) 2009, Mozilla Corp
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the <organization> nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY <copyright holder> ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Based on sample code from the OpenGL(R) ES 2.0 Programming Guide, which carriers
+ * the following header:
+ *
+ * Book:      OpenGL(R) ES 2.0 Programming Guide
+ * Authors:   Aaftab Munshi, Dan Ginsburg, Dave Shreiner
+ * ISBN-10:   0321502795
+ * ISBN-13:   9780321502797
+ * Publisher: Addison-Wesley Professional
+ * URLs:      http://safari.informit.com/9780321563835
+ *            http://www.opengles-book.com
+ */
+
+//
+// A simple 4x4 Matrix utility class
+//
+
+function Matrix4x4() {
+  this.elements = Array(16);
+  this.loadIdentity();
+}
+
+Matrix4x4.prototype = {
+  scale: function (sx, sy, sz) {
+    this.elements[0*4+0] *= sx;
+    this.elements[0*4+1] *= sx;
+    this.elements[0*4+2] *= sx;
+    this.elements[0*4+3] *= sx;
+
+    this.elements[1*4+0] *= sy;
+    this.elements[1*4+1] *= sy;
+    this.elements[1*4+2] *= sy;
+    this.elements[1*4+3] *= sy;
+
+    this.elements[2*4+0] *= sz;
+    this.elements[2*4+1] *= sz;
+    this.elements[2*4+2] *= sz;
+    this.elements[2*4+3] *= sz;
+
+    return this;
+  },
+
+  translate: function (tx, ty, tz) {
+    this.elements[3*4+0] += this.elements[0*4+0] * tx + this.elements[1*4+0] * ty + this.elements[2*4+0] * tz;
+    this.elements[3*4+1] += this.elements[0*4+1] * tx + this.elements[1*4+1] * ty + this.elements[2*4+1] * tz;
+    this.elements[3*4+2] += this.elements[0*4+2] * tx + this.elements[1*4+2] * ty + this.elements[2*4+2] * tz;
+    this.elements[3*4+3] += this.elements[0*4+3] * tx + this.elements[1*4+3] * ty + this.elements[2*4+3] * tz;
+
+    return this;
+  },
+
+  rotate: function (angle, x, y, z) {
+    var mag = Math.sqrt(x*x + y*y + z*z);
+    var sinAngle = Math.sin(angle * Math.PI / 180.0);
+    var cosAngle = Math.cos(angle * Math.PI / 180.0);
+
+    if (mag > 0) {
+      var xx, yy, zz, xy, yz, zx, xs, ys, zs;
+      var oneMinusCos;
+      var rotMat;
+
+      x /= mag;
+      y /= mag;
+      z /= mag;
+
+      xx = x * x;
+      yy = y * y;
+      zz = z * z;
+      xy = x * y;
+      yz = y * z;
+      zx = z * x;
+      xs = x * sinAngle;
+      ys = y * sinAngle;
+      zs = z * sinAngle;
+      oneMinusCos = 1.0 - cosAngle;
+
+      rotMat = new Matrix4x4();
+
+      rotMat.elements[0*4+0] = (oneMinusCos * xx) + cosAngle;
+      rotMat.elements[0*4+1] = (oneMinusCos * xy) - zs;
+      rotMat.elements[0*4+2] = (oneMinusCos * zx) + ys;
+      rotMat.elements[0*4+3] = 0.0;
+
+      rotMat.elements[1*4+0] = (oneMinusCos * xy) + zs;
+      rotMat.elements[1*4+1] = (oneMinusCos * yy) + cosAngle;
+      rotMat.elements[1*4+2] = (oneMinusCos * yz) - xs;
+      rotMat.elements[1*4+3] = 0.0;
+
+      rotMat.elements[2*4+0] = (oneMinusCos * zx) - ys;
+      rotMat.elements[2*4+1] = (oneMinusCos * yz) + xs;
+      rotMat.elements[2*4+2] = (oneMinusCos * zz) + cosAngle;
+      rotMat.elements[2*4+3] = 0.0;
+
+      rotMat.elements[3*4+0] = 0.0;
+      rotMat.elements[3*4+1] = 0.0;
+      rotMat.elements[3*4+2] = 0.0;
+      rotMat.elements[3*4+3] = 1.0;
+
+      rotMat = rotMat.multiply(this);
+      this.elements = rotMat.elements;
+    }
+
+    return this;
+  },
+
+  frustum: function (left, right, bottom, top, nearZ, farZ) {
+    var deltaX = right - left;
+    var deltaY = top - bottom;
+    var deltaZ = farZ - nearZ;
+    var frust;
+
+    if ( (nearZ <= 0.0) || (farZ <= 0.0) ||
+         (deltaX <= 0.0) || (deltaY <= 0.0) || (deltaZ <= 0.0) )
+         return this;
+
+    frust = new Matrix4x4();
+
+    frust.elements[0*4+0] = 2.0 * nearZ / deltaX;
+    frust.elements[0*4+1] = frust.elements[0*4+2] = frust.elements[0*4+3] = 0.0;
+
+    frust.elements[1*4+1] = 2.0 * nearZ / deltaY;
+    frust.elements[1*4+0] = frust.elements[1*4+2] = frust.elements[1*4+3] = 0.0;
+
+    frust.elements[2*4+0] = (right + left) / deltaX;
+    frust.elements[2*4+1] = (top + bottom) / deltaY;
+    frust.elements[2*4+2] = -(nearZ + farZ) / deltaZ;
+    frust.elements[2*4+3] = -1.0;
+
+    frust.elements[3*4+2] = -2.0 * nearZ * farZ / deltaZ;
+    frust.elements[3*4+0] = frust.elements[3*4+1] = frust.elements[3*4+3] = 0.0;
+
+    frust = frust.multiply(this);
+    this.elements = frust.elements;
+
+    return this;
+  },
+
+  perspective: function (fovy, aspect, nearZ, farZ) {
+    var frustumH = Math.tan(fovy / 360.0 * Math.PI) * nearZ;
+    var frustumW = frustumH * aspect;
+
+    return this.frustum(-frustumW, frustumW, -frustumH, frustumH, nearZ, farZ);
+  },
+
+  ortho: function (left, right, bottom, top, nearZ, farZ) {
+    var deltaX = right - left;
+    var deltaY = top - bottom;
+    var deltaZ = farZ - nearZ;
+
+    var ortho = new Matrix4x4();
+
+    if ( (deltaX == 0.0) || (deltaY == 0.0) || (deltaZ == 0.0) )
+        return this;
+
+    ortho.elements[0*4+0] = 2.0 / deltaX;
+    ortho.elements[3*4+0] = -(right + left) / deltaX;
+    ortho.elements[1*4+1] = 2.0 / deltaY;
+    ortho.elements[3*4+1] = -(top + bottom) / deltaY;
+    ortho.elements[2*4+2] = -2.0 / deltaZ;
+    ortho.elements[3*4+2] = -(nearZ + farZ) / deltaZ;
+
+    ortho = ortho.multiply(this);
+    this.elements = ortho.elements;
+
+    return this;
+  },
+
+  multiply: function (right) {
+    var tmp = new Matrix4x4();
+
+    for (var i = 0; i < 4; i++) {
+      tmp.elements[i*4+0] =
+        (this.elements[i*4+0] * right.elements[0*4+0]) +
+        (this.elements[i*4+1] * right.elements[1*4+0]) +
+        (this.elements[i*4+2] * right.elements[2*4+0]) +
+        (this.elements[i*4+3] * right.elements[3*4+0]) ;
+
+      tmp.elements[i*4+1] =
+        (this.elements[i*4+0] * right.elements[0*4+1]) +
+        (this.elements[i*4+1] * right.elements[1*4+1]) +
+        (this.elements[i*4+2] * right.elements[2*4+1]) +
+        (this.elements[i*4+3] * right.elements[3*4+1]) ;
+
+      tmp.elements[i*4+2] =
+        (this.elements[i*4+0] * right.elements[0*4+2]) +
+        (this.elements[i*4+1] * right.elements[1*4+2]) +
+        (this.elements[i*4+2] * right.elements[2*4+2]) +
+        (this.elements[i*4+3] * right.elements[3*4+2]) ;
+
+      tmp.elements[i*4+3] =
+        (this.elements[i*4+0] * right.elements[0*4+3]) +
+        (this.elements[i*4+1] * right.elements[1*4+3]) +
+        (this.elements[i*4+2] * right.elements[2*4+3]) +
+        (this.elements[i*4+3] * right.elements[3*4+3]) ;
+    }
+
+    this.elements = tmp.elements;
+    return this;
+  },
+
+  copy: function () {
+    var tmp = new Matrix4x4();
+    for (var i = 0; i < 16; i++) {
+      tmp.elements[i] = this.elements[i];
+    }
+    return tmp;
+  },
+
+  get: function (row, col) {
+    return this.elements[4*row+col];
+  },
+
+  // In-place inversion
+  invert: function () {
+    var tmp_0 = this.get(2,2) * this.get(3,3);
+    var tmp_1 = this.get(3,2) * this.get(2,3);
+    var tmp_2 = this.get(1,2) * this.get(3,3);
+    var tmp_3 = this.get(3,2) * this.get(1,3);
+    var tmp_4 = this.get(1,2) * this.get(2,3);
+    var tmp_5 = this.get(2,2) * this.get(1,3);
+    var tmp_6 = this.get(0,2) * this.get(3,3);
+    var tmp_7 = this.get(3,2) * this.get(0,3);
+    var tmp_8 = this.get(0,2) * this.get(2,3);
+    var tmp_9 = this.get(2,2) * this.get(0,3);
+    var tmp_10 = this.get(0,2) * this.get(1,3);
+    var tmp_11 = this.get(1,2) * this.get(0,3);
+    var tmp_12 = this.get(2,0) * this.get(3,1);
+    var tmp_13 = this.get(3,0) * this.get(2,1);
+    var tmp_14 = this.get(1,0) * this.get(3,1);
+    var tmp_15 = this.get(3,0) * this.get(1,1);
+    var tmp_16 = this.get(1,0) * this.get(2,1);
+    var tmp_17 = this.get(2,0) * this.get(1,1);
+    var tmp_18 = this.get(0,0) * this.get(3,1);
+    var tmp_19 = this.get(3,0) * this.get(0,1);
+    var tmp_20 = this.get(0,0) * this.get(2,1);
+    var tmp_21 = this.get(2,0) * this.get(0,1);
+    var tmp_22 = this.get(0,0) * this.get(1,1);
+    var tmp_23 = this.get(1,0) * this.get(0,1);
+
+    var t0 = ((tmp_0 * this.get(1,1) + tmp_3 * this.get(2,1) + tmp_4 * this.get(3,1)) -
+              (tmp_1 * this.get(1,1) + tmp_2 * this.get(2,1) + tmp_5 * this.get(3,1)));
+    var t1 = ((tmp_1 * this.get(0,1) + tmp_6 * this.get(2,1) + tmp_9 * this.get(3,1)) -
+              (tmp_0 * this.get(0,1) + tmp_7 * this.get(2,1) + tmp_8 * this.get(3,1)));
+    var t2 = ((tmp_2 * this.get(0,1) + tmp_7 * this.get(1,1) + tmp_10 * this.get(3,1)) -
+              (tmp_3 * this.get(0,1) + tmp_6 * this.get(1,1) + tmp_11 * this.get(3,1)));
+    var t3 = ((tmp_5 * this.get(0,1) + tmp_8 * this.get(1,1) + tmp_11 * this.get(2,1)) -
+              (tmp_4 * this.get(0,1) + tmp_9 * this.get(1,1) + tmp_10 * this.get(2,1)));
+
+    var d = 1.0 / (this.get(0,0) * t0 + this.get(1,0) * t1 + this.get(2,0) * t2 + this.get(3,0) * t3);
+
+    var out_00 = d * t0;
+    var out_01 = d * t1;
+    var out_02 = d * t2;
+    var out_03 = d * t3;
+
+    var out_10 = d * ((tmp_1 * this.get(1,0) + tmp_2 * this.get(2,0) + tmp_5 * this.get(3,0)) -
+                      (tmp_0 * this.get(1,0) + tmp_3 * this.get(2,0) + tmp_4 * this.get(3,0)));
+    var out_11 = d * ((tmp_0 * this.get(0,0) + tmp_7 * this.get(2,0) + tmp_8 * this.get(3,0)) -
+                      (tmp_1 * this.get(0,0) + tmp_6 * this.get(2,0) + tmp_9 * this.get(3,0)));
+    var out_12 = d * ((tmp_3 * this.get(0,0) + tmp_6 * this.get(1,0) + tmp_11 * this.get(3,0)) -
+                      (tmp_2 * this.get(0,0) + tmp_7 * this.get(1,0) + tmp_10 * this.get(3,0)));
+    var out_13 = d * ((tmp_4 * this.get(0,0) + tmp_9 * this.get(1,0) + tmp_10 * this.get(2,0)) -
+                      (tmp_5 * this.get(0,0) + tmp_8 * this.get(1,0) + tmp_11 * this.get(2,0)));
+
+    var out_20 = d * ((tmp_12 * this.get(1,3) + tmp_15 * this.get(2,3) + tmp_16 * this.get(3,3)) -
+                      (tmp_13 * this.get(1,3) + tmp_14 * this.get(2,3) + tmp_17 * this.get(3,3)));
+    var out_21 = d * ((tmp_13 * this.get(0,3) + tmp_18 * this.get(2,3) + tmp_21 * this.get(3,3)) -
+                      (tmp_12 * this.get(0,3) + tmp_19 * this.get(2,3) + tmp_20 * this.get(3,3)));
+    var out_22 = d * ((tmp_14 * this.get(0,3) + tmp_19 * this.get(1,3) + tmp_22 * this.get(3,3)) -
+                      (tmp_15 * this.get(0,3) + tmp_18 * this.get(1,3) + tmp_23 * this.get(3,3)));
+    var out_23 = d * ((tmp_17 * this.get(0,3) + tmp_20 * this.get(1,3) + tmp_23 * this.get(2,3)) -
+                      (tmp_16 * this.get(0,3) + tmp_21 * this.get(1,3) + tmp_22 * this.get(2,3)));
+    
+    var out_30 = d * ((tmp_14 * this.get(2,2) + tmp_17 * this.get(3,2) + tmp_13 * this.get(1,2)) -
+                      (tmp_16 * this.get(3,2) + tmp_12 * this.get(1,2) + tmp_15 * this.get(2,2)));
+    var out_31 = d * ((tmp_20 * this.get(3,2) + tmp_12 * this.get(0,2) + tmp_19 * this.get(2,2)) -
+                      (tmp_18 * this.get(2,2) + tmp_21 * this.get(3,2) + tmp_13 * this.get(0,2)));
+    var out_32 = d * ((tmp_18 * this.get(1,2) + tmp_23 * this.get(3,2) + tmp_15 * this.get(0,2)) -
+                      (tmp_22 * this.get(3,2) + tmp_14 * this.get(0,2) + tmp_19 * this.get(1,2)));
+    var out_33 = d * ((tmp_22 * this.get(2,2) + tmp_16 * this.get(0,2) + tmp_21 * this.get(1,2)) -
+                      (tmp_20 * this.get(1,2) + tmp_23 * this.get(2,2) + tmp_17 * this.get(0,2)));
+
+    this.elements[0*4+0] = out_00;
+    this.elements[0*4+1] = out_01;
+    this.elements[0*4+2] = out_02;
+    this.elements[0*4+3] = out_03;
+    this.elements[1*4+0] = out_10;
+    this.elements[1*4+1] = out_11;
+    this.elements[1*4+2] = out_12;
+    this.elements[1*4+3] = out_13;
+    this.elements[2*4+0] = out_20;
+    this.elements[2*4+1] = out_21;
+    this.elements[2*4+2] = out_22;
+    this.elements[2*4+3] = out_23;
+    this.elements[3*4+0] = out_30;
+    this.elements[3*4+1] = out_31;
+    this.elements[3*4+2] = out_32;
+    this.elements[3*4+3] = out_33;
+    return this;
+  },
+
+  // Returns new matrix which is the inverse of this
+  inverse: function () {
+    var tmp = this.copy();
+    return tmp.invert();
+  },
+  
+  // In-place transpose
+  transpose: function () {
+    var tmp = this.elements[0*4+1];
+    this.elements[0*4+1] = this.elements[1*4+0];
+    this.elements[1*4+0] = tmp;
+
+    tmp = this.elements[0*4+2];
+    this.elements[0*4+2] = this.elements[2*4+0];
+    this.elements[2*4+0] = tmp;
+
+    tmp = this.elements[0*4+3];
+    this.elements[0*4+3] = this.elements[3*4+0];
+    this.elements[3*4+0] = tmp;
+
+    tmp = this.elements[1*4+2];
+    this.elements[1*4+2] = this.elements[2*4+1];
+    this.elements[2*4+1] = tmp;
+
+    tmp = this.elements[1*4+3];
+    this.elements[1*4+3] = this.elements[3*4+1];
+    this.elements[3*4+1] = tmp;
+
+    tmp = this.elements[2*4+3];
+    this.elements[2*4+3] = this.elements[3*4+2];
+    this.elements[3*4+2] = tmp;
+
+    return this;
+  },
+
+  loadIdentity: function () {
+    for (var i = 0; i < 16; i++)
+      this.elements[i] = 0;
+    this.elements[0*4+0] = 1.0;
+    this.elements[1*4+1] = 1.0;
+    this.elements[2*4+2] = 1.0;
+    this.elements[3*4+3] = 1.0;
+    return this;
+  }
+};