third_party/WebKit/Source/platform/graphics/paint/TransformDisplayItem.h

   1 // Copyright 2014 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 #ifndef TransformDisplayItem_h
   6 #define TransformDisplayItem_h
   7
   8 #include "platform/graphics/paint/DisplayItem.h"
   9 #include "platform/transforms/AffineTransform.h"
  10 #include "wtf/PassOwnPtr.h"
  11
  12 namespace blink {
  13
  14 class PLATFORM_EXPORT BeginTransformDisplayItem final : public PairedBeginDisplayItem {
  15 public:
  16     BeginTransformDisplayItem(const DisplayItemClientWrapper& client, const AffineTransform& transform)
  17         : PairedBeginDisplayItem(client, BeginTransform, sizeof(*this))
  18         , m_transform(transform) { }
  19
  20     void replay(GraphicsContext&) override;
  21     void appendToWebDisplayItemList(WebDisplayItemList*) const override;
  22
  23     const AffineTransform& transform() const { return m_transform; }
  24
  25 private:
  26 #ifndef NDEBUG
  27     void dumpPropertiesAsDebugString(WTF::StringBuilder&) const final;
  28 #endif
  29 #if ENABLE(ASSERT)
  30     bool equals(const DisplayItem& other) const final
  31     {
  32         return DisplayItem::equals(other)
  33             && m_transform == static_cast<const BeginTransformDisplayItem&>(other).m_transform;
  34     }
  35 #endif
  36
  37     const AffineTransform m_transform;
  38 };
  39
  40 class PLATFORM_EXPORT EndTransformDisplayItem final : public PairedEndDisplayItem {
  41 public:
  42     EndTransformDisplayItem(const DisplayItemClientWrapper& client)
  43         : PairedEndDisplayItem(client, EndTransform, sizeof(*this)) { }
  44
  45     void replay(GraphicsContext&) override;
  46     void appendToWebDisplayItemList(WebDisplayItemList*) const override;
  47
  48 private:
  49 #if ENABLE(ASSERT)
  50     bool isEndAndPairedWith(DisplayItem::Type otherType) const final { return otherType == BeginTransform; }
  51 #endif
  52 };
  53
  54 } // namespace blink
  55
  56 #endif // TransformDisplayItem_h