cc/resources/layer_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/resources/layer_quad.h"
   6
   7 #include "testing/gtest/include/gtest/gtest.h"
   8 #include "ui/gfx/geometry/quad_f.h"
   9
  10 namespace cc {
  11 namespace {
  12
  13 TEST(LayerQuadTest, QuadFConversion) {
  14   gfx::PointF p1(-0.5f, -0.5f);
  15   gfx::PointF p2(0.5f, -0.5f);
  16   gfx::PointF p3(0.5f, 0.5f);
  17   gfx::PointF p4(-0.5f, 0.5f);
  18
  19   gfx::QuadF quad_cw(p1, p2, p3, p4);
  20   LayerQuad layer_quad_cw(quad_cw);
  21   EXPECT_EQ(layer_quad_cw.ToQuadF(), quad_cw);
  22
  23   gfx::QuadF quad_ccw(p1, p4, p3, p2);
  24   LayerQuad layer_quad_ccw(quad_ccw);
  25   EXPECT_EQ(layer_quad_ccw.ToQuadF(), quad_ccw);
  26 }
  27
  28 TEST(LayerQuadTest, Inflate) {
  29   gfx::PointF p1(-0.5f, -0.5f);
  30   gfx::PointF p2(0.5f, -0.5f);
  31   gfx::PointF p3(0.5f, 0.5f);
  32   gfx::PointF p4(-0.5f, 0.5f);
  33
  34   gfx::QuadF quad(p1, p2, p3, p4);
  35   LayerQuad layer_quad(quad);
  36   quad.Scale(2.f, 2.f);
  37   layer_quad.Inflate(0.5f);
  38   EXPECT_EQ(layer_quad.ToQuadF(), quad);
  39 }
  40
  41 TEST(LayerQuadTest, Degenerate) {
  42   gfx::QuadF quad;
  43   gfx::PointF p1(1.0f, 1.0f);
  44   gfx::PointF p2(0.0f, 1.0f);
  45   gfx::PointF p3(1.0f, 0.0f);
  46   gfx::QuadF triangle(p1, p2, p3, p1);
  47
  48   LayerQuad::Edge e1d(p1, p1);
  49   LayerQuad::Edge e2d(p2, p2);
  50   LayerQuad::Edge e2(p1, p2);
  51   LayerQuad::Edge e3(p2, p3);
  52   LayerQuad::Edge e4(p3, p1);
  53   EXPECT_TRUE(e1d.degenerate());
  54   EXPECT_TRUE(e2d.degenerate());
  55   EXPECT_FALSE(e2.degenerate());
  56   EXPECT_FALSE(e3.degenerate());
  57   EXPECT_FALSE(e4.degenerate());
  58
  59   LayerQuad degenerate_quad(e1d, e2d, e2, e3);
  60   // With more than one degenerate edge, we expect the quad to be zero.
  61   EXPECT_EQ(quad, degenerate_quad.ToQuadF());
  62
  63   LayerQuad triangle_quad(e1d, e2, e3, e4);
  64   // With only one degenerate edge, we expect the quad to be a triangle.
  65   EXPECT_EQ(triangle, triangle_quad.ToQuadF());
  66 }
  67
  68 }  // namespace
  69 }  // namespace cc