[cc] Change cc_tests.gyp filenames to Chromium style

cc/CCMathUtilTest.cpp

-// Copyright 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "config.h"
-
-#include "CCMathUtil.h"
-
-#include "CCGeometryTestUtils.h"
-#include "FloatRect.h"
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include <public/WebTransformationMatrix.h>
-
-using namespace cc;
-using WebKit::WebTransformationMatrix;
-
-namespace {
-
-TEST(CCMathUtilTest, verifyBackfaceVisibilityBasicCases)
-{
-    WebTransformationMatrix transform;
-
-    transform.makeIdentity();
-    EXPECT_FALSE(transform.isBackFaceVisible());
-
-    transform.makeIdentity();
-    transform.rotate3d(0, 80, 0);
-    EXPECT_FALSE(transform.isBackFaceVisible());
-
-    transform.makeIdentity();
-    transform.rotate3d(0, 100, 0);
-    EXPECT_TRUE(transform.isBackFaceVisible());
-
-    // Edge case, 90 degree rotation should return false.
-    transform.makeIdentity();
-    transform.rotate3d(0, 90, 0);
-    EXPECT_FALSE(transform.isBackFaceVisible());
-}
-
-TEST(CCMathUtilTest, verifyBackfaceVisibilityForPerspective)
-{
-    WebTransformationMatrix layerSpaceToProjectionPlane;
-
-    // This tests if isBackFaceVisible works properly under perspective transforms.
-    // Specifically, layers that may have their back face visible in orthographic
-    // projection, may not actually have back face visible under perspective projection.
-
-    // Case 1: Layer is rotated by slightly more than 90 degrees, at the center of the
-    //         prespective projection. In this case, the layer's back-side is visible to
-    //         the camera.
-    layerSpaceToProjectionPlane.makeIdentity();
-    layerSpaceToProjectionPlane.applyPerspective(1);
-    layerSpaceToProjectionPlane.translate3d(0, 0, 0);
-    layerSpaceToProjectionPlane.rotate3d(0, 100, 0);
-    EXPECT_TRUE(layerSpaceToProjectionPlane.isBackFaceVisible());
-
-    // Case 2: Layer is rotated by slightly more than 90 degrees, but shifted off to the
-    //         side of the camera. Because of the wide field-of-view, the layer's front
-    //         side is still visible.
-    //
-    //                       |<-- front side of layer is visible to perspective camera
-    //                    \  |            /
-    //                     \ |           /
-    //                      \|          /
-    //                       |         /
-    //                       |\       /<-- camera field of view
-    //                       | \     /
-    // back side of layer -->|  \   /
-    //                           \./ <-- camera origin
-    //
-    layerSpaceToProjectionPlane.makeIdentity();
-    layerSpaceToProjectionPlane.applyPerspective(1);
-    layerSpaceToProjectionPlane.translate3d(-10, 0, 0);
-    layerSpaceToProjectionPlane.rotate3d(0, 100, 0);
-    EXPECT_FALSE(layerSpaceToProjectionPlane.isBackFaceVisible());
-
-    // Case 3: Additionally rotating the layer by 180 degrees should of course show the
-    //         opposite result of case 2.
-    layerSpaceToProjectionPlane.rotate3d(0, 180, 0);
-    EXPECT_TRUE(layerSpaceToProjectionPlane.isBackFaceVisible());
-}
-
-TEST(CCMathUtilTest, verifyProjectionOfPerpendicularPlane)
-{
-    // In this case, the m33() element of the transform becomes zero, which could cause a
-    // divide-by-zero when projecting points/quads.
-
-    WebTransformationMatrix transform;
-    transform.makeIdentity();
-    transform.setM33(0);
-
-    FloatRect rect = FloatRect(0, 0, 1, 1);
-    FloatRect projectedRect = CCMathUtil::projectClippedRect(transform, rect);
-
-    EXPECT_EQ(0, projectedRect.x());
-    EXPECT_EQ(0, projectedRect.y());
-    EXPECT_TRUE(projectedRect.isEmpty());
-}
-
-TEST(CCMathUtilTest, verifyEnclosingClippedRectUsesCorrectInitialBounds)
-{
-    HomogeneousCoordinate h1(-100, -100, 0, 1);
-    HomogeneousCoordinate h2(-10, -10, 0, 1);
-    HomogeneousCoordinate h3(10, 10, 0, -1);
-    HomogeneousCoordinate h4(100, 100, 0, -1);
-
-    // The bounds of the enclosing clipped rect should be -100 to -10 for both x and y.
-    // However, if there is a bug where the initial xmin/xmax/ymin/ymax are initialized to
-    // numeric_limits<float>::min() (which is zero, not -flt_max) then the enclosing
-    // clipped rect will be computed incorrectly.
-    FloatRect result = CCMathUtil::computeEnclosingClippedRect(h1, h2, h3, h4);
-
-    EXPECT_FLOAT_RECT_EQ(FloatRect(FloatPoint(-100, -100), FloatSize(90, 90)), result);
-}
-
-TEST(CCMathUtilTest, verifyEnclosingRectOfVerticesUsesCorrectInitialBounds)
-{
-    FloatPoint vertices[3];
-    int numVertices = 3;
-
-    vertices[0] = FloatPoint(-10, -100);
-    vertices[1] = FloatPoint(-100, -10);
-    vertices[2] = FloatPoint(-30, -30);
-
-    // The bounds of the enclosing rect should be -100 to -10 for both x and y. However,
-    // if there is a bug where the initial xmin/xmax/ymin/ymax are initialized to
-    // numeric_limits<float>::min() (which is zero, not -flt_max) then the enclosing
-    // clipped rect will be computed incorrectly.
-    FloatRect result = CCMathUtil::computeEnclosingRectOfVertices(vertices, numVertices);
-
-    EXPECT_FLOAT_RECT_EQ(FloatRect(FloatPoint(-100, -100), FloatSize(90, 90)), result);
-}
-
-TEST(CCMathUtilTest, smallestAngleBetweenVectors)
-{
-    FloatSize x(1, 0);
-    FloatSize y(0, 1);
-    FloatSize testVector(0.5, 0.5);
-
-    // Orthogonal vectors are at an angle of 90 degress.
-    EXPECT_EQ(90, CCMathUtil::smallestAngleBetweenVectors(x, y));
-
-    // A vector makes a zero angle with itself.
-    EXPECT_EQ(0, CCMathUtil::smallestAngleBetweenVectors(x, x));
-    EXPECT_EQ(0, CCMathUtil::smallestAngleBetweenVectors(y, y));
-    EXPECT_EQ(0, CCMathUtil::smallestAngleBetweenVectors(testVector, testVector));
-
-    // Parallel but reversed vectors are at 180 degrees.
-    EXPECT_FLOAT_EQ(180, CCMathUtil::smallestAngleBetweenVectors(x, -x));
-    EXPECT_FLOAT_EQ(180, CCMathUtil::smallestAngleBetweenVectors(y, -y));
-    EXPECT_FLOAT_EQ(180, CCMathUtil::smallestAngleBetweenVectors(testVector, -testVector));
-
-    // The test vector is at a known angle.
-    EXPECT_FLOAT_EQ(45, floor(CCMathUtil::smallestAngleBetweenVectors(testVector, x)));
-    EXPECT_FLOAT_EQ(45, floor(CCMathUtil::smallestAngleBetweenVectors(testVector, y)));
-}
-
-TEST(CCMathUtilTest, vectorProjection)
-{
-    FloatSize x(1, 0);
-    FloatSize y(0, 1);
-    FloatSize testVector(0.3f, 0.7f);
-
-    // Orthogonal vectors project to a zero vector.
-    EXPECT_EQ(FloatSize(0, 0), CCMathUtil::projectVector(x, y));
-    EXPECT_EQ(FloatSize(0, 0), CCMathUtil::projectVector(y, x));
-
-    // Projecting a vector onto the orthonormal basis gives the corresponding component of the
-    // vector.
-    EXPECT_EQ(FloatSize(testVector.width(), 0), CCMathUtil::projectVector(testVector, x));
-    EXPECT_EQ(FloatSize(0, testVector.height()), CCMathUtil::projectVector(testVector, y));
-
-    // Finally check than an arbitrary vector projected to another one gives a vector parallel to
-    // the second vector.
-    FloatSize targetVector(0.5, 0.2f);
-    FloatSize projectedVector = CCMathUtil::projectVector(testVector, targetVector);
-    EXPECT_EQ(projectedVector.width() / targetVector.width(),
-              projectedVector.height() / targetVector.height());
-}
-
-} // namespace