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Unified Diff: cc/CCMathUtilTest.cpp

Issue 11108020: [cc] Change cc_tests.gyp filenames to Chromium style (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Rebase Created 8 years, 2 months ago
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Index: cc/CCMathUtilTest.cpp
diff --git a/cc/CCMathUtilTest.cpp b/cc/CCMathUtilTest.cpp
deleted file mode 100644
index 5fd1e8ec82262107ff60c2d76212fda662e0d10d..0000000000000000000000000000000000000000
--- a/cc/CCMathUtilTest.cpp
+++ /dev/null
@@ -1,182 +0,0 @@
-// 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
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