text: // Copyright 2011 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 "FloatQuad.h"
  #include "cc/math_util.h"
  #include "testing/gtest/include/gtest/gtest.h"
  #include "ui/gfx/rect_f.h"
  #include <public/WebTransformationMatrix.h>
  
  using namespace cc;
  using WebKit::WebTransformationMatrix;
  
  namespace {
  
  TEST(FloatQuadTest, IsRectilinearTest)
  {
      const int numRectilinear = 8;
      WebTransformationMatrix rectilinearTrans[numRectilinear];
      rectilinearTrans[1].rotate(90);
      rectilinearTrans[2].rotate(180);
      rectilinearTrans[3].rotate(270);
      rectilinearTrans[4].skewX(0.00000000001);
      rectilinearTrans[5].skewY(0.00000000001);
      rectilinearTrans[6].scale(0.00001);
      rectilinearTrans[6].rotate(180);
      rectilinearTrans[7].scale(100000);
      rectilinearTrans[7].rotate(180);
  
      for (int i = 0; i < numRectilinear; ++i) {
          bool clipped = false;
          FloatQuad quad = MathUtil::mapQuad(rectilinearTrans[i], gfx::RectF(0.01010101f, 0.01010101f, 100.01010101f, 100.01010101f), clipped);
          ASSERT_TRUE(!clipped);
          EXPECT_TRUE(quad.isRectilinear());
      }
  
      const int numNonRectilinear = 10;
      WebTransformationMatrix nonRectilinearTrans[numNonRectilinear];
      nonRectilinearTrans[0].rotate(359.999);
      nonRectilinearTrans[1].rotate(0.0000001);
      nonRectilinearTrans[2].rotate(89.999999);
      nonRectilinearTrans[3].rotate(90.0000001);
      nonRectilinearTrans[4].rotate(179.999999);
      nonRectilinearTrans[5].rotate(180.0000001);
      nonRectilinearTrans[6].rotate(269.999999);
      nonRectilinearTrans[7].rotate(270.0000001);
      nonRectilinearTrans[8].skewX(0.00001);
      nonRectilinearTrans[9].skewY(0.00001);
  
      for (int i = 0; i < numNonRectilinear; ++i) {
          bool clipped = false;
          FloatQuad quad = MathUtil::mapQuad(nonRectilinearTrans[i], gfx::RectF(0.01010101f, 0.01010101f, 100.01010101f, 100.01010101f), clipped);
          ASSERT_TRUE(!clipped);
          EXPECT_FALSE(quad.isRectilinear());
      }
  }
  
  } // empty namespace
  