cfx_windowsrenderdevice_embeddertest.cpp

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// Copyright 2019 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "core/fxge/cfx_windowsrenderdevice.h"
 
#include <windows.h>
 
#include <memory>
 
#include "core/fxge/cfx_fillrenderoptions.h"
#include "core/fxge/cfx_path.h"
#include "core/fxge/win32/cfx_psfonttracker.h"
#include "testing/embedder_test.h"
#include "testing/gtest/include/gtest/gtest.h"
 
namespace {
 
constexpr CFX_Matrix kIdentityMatrix;
 
}  // namespace
 
class CFX_WindowsRenderDeviceTest : public EmbedderTest {
 public:
  void SetUp() override {
    EmbedderTest::SetUp();
 
    // Get a device context with Windows GDI.
    m_hDC = CreateCompatibleDC(nullptr);
    ASSERT_TRUE(m_hDC);
    m_driver = std::make_unique<CFX_WindowsRenderDevice>(
        m_hDC, &m_PSFontTracker, /*encoder_iface=*/nullptr);
    m_driver->SaveState();
  }
 
  void TearDown() override {
    m_driver->RestoreState(false);
    m_driver.reset();
    DeleteDC(m_hDC);
    EmbedderTest::TearDown();
  }
 
 protected:
  HDC m_hDC;
  CFX_PSFontTracker m_PSFontTracker;
  std::unique_ptr<CFX_WindowsRenderDevice> m_driver;
};
 
TEST_F(CFX_WindowsRenderDeviceTest, SimpleClipTriangle) {
  CFX_Path path_data;
  CFX_PointF p1(0.0f, 0.0f);
  CFX_PointF p2(0.0f, 100.0f);
  CFX_PointF p3(100.0f, 100.0f);
 
  path_data.AppendLine(p1, p2);
  path_data.AppendLine(p2, p3);
  path_data.AppendLine(p3, p1);
  path_data.ClosePath();
  EXPECT_TRUE(m_driver->SetClip_PathFill(
      path_data, &kIdentityMatrix, CFX_FillRenderOptions::WindingOptions()));
}
 
TEST_F(CFX_WindowsRenderDeviceTest, SimpleClipRect) {
  CFX_Path path_data;
 
  path_data.AppendRect(0.0f, 100.0f, 200.0f, 0.0f);
  path_data.ClosePath();
  EXPECT_TRUE(m_driver->SetClip_PathFill(
      path_data, &kIdentityMatrix, CFX_FillRenderOptions::WindingOptions()));
}
 
TEST_F(CFX_WindowsRenderDeviceTest, GargantuanClipRect) {
  CFX_Path path_data;
 
  path_data.AppendRect(-257698020.0f, -257697252.0f, 257698044.0f,
                       257698812.0f);
  path_data.ClosePath();
  // These coordinates for a clip path are valid, just very large. Using these
  // for a clip path should allow IntersectClipRect() to return success;
  // however they do not because the GDI API IntersectClipRect() errors out and
  // affect subsequent imaging.  crbug.com/1019026
  EXPECT_FALSE(m_driver->SetClip_PathFill(
      path_data, &kIdentityMatrix, CFX_FillRenderOptions::WindingOptions()));
}
 
TEST_F(CFX_WindowsRenderDeviceTest, GargantuanClipRectWithBaseClip) {
  CFX_Path path_data;
  const FX_RECT kBaseClip(0, 0, 5100, 6600);
 
  m_driver->SetBaseClip(kBaseClip);
  path_data.AppendRect(-257698020.0f, -257697252.0f, 257698044.0f,
                       257698812.0f);
  path_data.ClosePath();
  // Use of a reasonable base clip ensures that we avoid getting an error back
  // from GDI API IntersectClipRect().
  EXPECT_TRUE(m_driver->SetClip_PathFill(
      path_data, &kIdentityMatrix, CFX_FillRenderOptions::WindingOptions()));
}