| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "platform/graphics/paint/SubsequenceRecorder.h" |
| |
| #include "platform/RuntimeEnabledFeatures.h" |
| #include "platform/graphics/GraphicsContext.h" |
| #include "platform/graphics/paint/PaintController.h" |
| #include "platform/graphics/paint/SubsequenceDisplayItem.h" |
| |
| namespace blink { |
| |
| SubsequenceRecorder::SubsequenceRecorder(GraphicsContext& context, |
| const DisplayItemClient& client) |
| : m_paintController(context.getPaintController()), |
| m_client(client), |
| m_beginSubsequenceIndex(0) { |
| if (m_paintController.displayItemConstructionIsDisabled()) |
| return; |
| |
| m_beginSubsequenceIndex = m_paintController.newDisplayItemList().size(); |
| m_paintController.createAndAppend<BeginSubsequenceDisplayItem>(m_client); |
| } |
| |
| SubsequenceRecorder::~SubsequenceRecorder() { |
| if (m_paintController.displayItemConstructionIsDisabled()) |
| return; |
| |
| if (m_paintController.lastDisplayItemIsNoopBegin()) { |
| ASSERT(m_beginSubsequenceIndex == |
| m_paintController.newDisplayItemList().size() - 1); |
| // Remove uncacheable no-op BeginSubsequence/EndSubsequence pairs. |
| // Don't remove cacheable no-op pairs because we need to match them later |
| // with CachedSubsequences. |
| if (m_paintController.newDisplayItemList().last().skippedCache()) { |
| m_paintController.removeLastDisplayItem(); |
| return; |
| } |
| } |
| |
| m_paintController.createAndAppend<EndSubsequenceDisplayItem>(m_client); |
| } |
| |
| } // namespace blink |
