cc/base/float_quad_unittest.cc

   1 // Copyright 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/base/math_util.h"
   6 #include "testing/gtest/include/gtest/gtest.h"
   7 #include "ui/gfx/quad_f.h"
   8 #include "ui/gfx/rect_f.h"
   9 #include "ui/gfx/transform.h"
  10
  11 namespace cc {
  12 namespace {
  13
  14 // TODO(danakj) Move this test to ui/gfx/ when we don't need MathUtil::MapQuad.
  15 TEST(FloatQuadTest, IsRectilinearTest) {
  16   const int kNumRectilinear = 8;
  17   gfx::Transform rectilinear_trans[kNumRectilinear];
  18   rectilinear_trans[1].Rotate(90.0);
  19   rectilinear_trans[2].Rotate(180.0);
  20   rectilinear_trans[3].Rotate(270.0);
  21   rectilinear_trans[4].SkewX(0.00000000001);
  22   rectilinear_trans[5].SkewY(0.00000000001);
  23   rectilinear_trans[6].Scale(0.00001, 0.00001);
  24   rectilinear_trans[6].Rotate(180.0);
  25   rectilinear_trans[7].Scale(100000, 100000);
  26   rectilinear_trans[7].Rotate(180.0);
  27
  28   gfx::QuadF original(
  29       gfx::RectF(0.01010101f, 0.01010101f, 100.01010101f, 100.01010101f));
  30
  31   for (int i = 0; i < kNumRectilinear; ++i) {
  32     bool clipped = false;
  33     gfx::QuadF quad =
  34         MathUtil::MapQuad(rectilinear_trans[i], original, &clipped);
  35     ASSERT_TRUE(!clipped) << "case " << i;
  36     EXPECT_TRUE(quad.IsRectilinear()) << "case " << i;
  37   }
  38
  39   const int kNumNonRectilinear = 10;
  40   gfx::Transform non_rectilinear_trans[kNumNonRectilinear];
  41   non_rectilinear_trans[0].Rotate(359.999);
  42   non_rectilinear_trans[1].Rotate(0.0000001);
  43   non_rectilinear_trans[2].Rotate(89.999999);
  44   non_rectilinear_trans[3].Rotate(90.0000001);
  45   non_rectilinear_trans[4].Rotate(179.999999);
  46   non_rectilinear_trans[5].Rotate(180.0000001);
  47   non_rectilinear_trans[6].Rotate(269.999999);
  48   non_rectilinear_trans[7].Rotate(270.0000001);
  49   non_rectilinear_trans[8].SkewX(0.00001);
  50   non_rectilinear_trans[9].SkewY(0.00001);
  51
  52   for (int i = 0; i < kNumNonRectilinear; ++i) {
  53     bool clipped = false;
  54     gfx::QuadF quad =
  55         MathUtil::MapQuad(non_rectilinear_trans[i], original, &clipped);
  56     ASSERT_TRUE(!clipped) << "case " << i;
  57     EXPECT_FALSE(quad.IsRectilinear()) << "case " << i;
  58   }
  59 }
  60
  61 }  // namespace
  62 }  // namespace cc