third_party/WebKit/Source/web/WebGraphicsContextImpl.cpp

   1 // Copyright 2015 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 "config.h"
   6 #include "web/WebGraphicsContextImpl.h"
   7
   8 #include "platform/graphics/GraphicsContext.h"
   9 #include "platform/graphics/paint/DrawingRecorder.h"
  10
  11 namespace blink {
  12
  13 WebGraphicsContextImpl::WebGraphicsContextImpl(GraphicsContext& graphicsContext, const DisplayItemClientWrapper& client, DisplayItem::Type type)
  14     : m_graphicsContext(graphicsContext)
  15     , m_client(client)
  16     , m_type(type)
  17 #ifndef NDEBUG
  18     , m_hasBegunDrawing(false)
  19 #endif
  20 {
  21 }
  22
  23 WebGraphicsContextImpl::~WebGraphicsContextImpl()
  24 {
  25 }
  26
  27 WebCanvas* WebGraphicsContextImpl::beginDrawing(const WebFloatRect& bounds)
  28 {
  29 #ifndef NDEBUG
  30     ASSERT(!m_hasBegunDrawing);
  31     m_hasBegunDrawing = true;
  32 #endif
  33     ASSERT(!DrawingRecorder::useCachedDrawingIfPossible(m_graphicsContext, m_client, m_type));
  34     m_drawingRecorder = adoptPtr(new DrawingRecorder(m_graphicsContext, m_client, m_type, bounds));
  35     WebCanvas* canvas = m_graphicsContext.canvas();
  36     ASSERT(canvas);
  37     return canvas;
  38 }
  39
  40 void WebGraphicsContextImpl::endDrawing()
  41 {
  42     ASSERT(m_drawingRecorder);
  43     m_drawingRecorder.clear();
  44 }
  45
  46 } // namespace blink