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| 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 "platform/graphics/paint/SubtreeRecorder.h" | |
| 7 | |
| 8 #include "platform/RuntimeEnabledFeatures.h" | |
| 9 #include "platform/graphics/GraphicsContext.h" | |
| 10 #include "platform/graphics/paint/CachedDisplayItem.h" | |
| 11 #include "platform/graphics/paint/DisplayItemList.h" | |
| 12 #include "platform/graphics/paint/SubtreeDisplayItem.h" | |
| 13 | |
| 14 namespace blink { | |
| 15 | |
| 16 SubtreeRecorder::SubtreeRecorder(GraphicsContext& context, const DisplayItemClie
ntWrapper& client, int paintPhase) | |
| 17 : m_displayItemList(context.displayItemList()) | |
| 18 , m_client(client) | |
| 19 , m_paintPhase(paintPhase) | |
| 20 , m_canUseCache(false) | |
| 21 #if ENABLE(ASSERT) | |
| 22 , m_checkedCanUseCache(false) | |
| 23 #endif | |
| 24 { | |
| 25 if (!RuntimeEnabledFeatures::slimmingPaintV2Enabled()) | |
| 26 return; | |
| 27 | |
| 28 ASSERT(m_displayItemList); | |
| 29 | |
| 30 // TODO(wangxianzhu): Implement subtree caching. | |
| 31 | |
| 32 if (!m_canUseCache) | |
| 33 m_displayItemList->createAndAppend<BeginSubtreeDisplayItem>(m_client, Di
splayItem::paintPhaseToBeginSubtreeType(paintPhase)); | |
| 34 } | |
| 35 | |
| 36 SubtreeRecorder::~SubtreeRecorder() | |
| 37 { | |
| 38 if (!RuntimeEnabledFeatures::slimmingPaintV2Enabled()) | |
| 39 return; | |
| 40 | |
| 41 ASSERT(m_checkedCanUseCache); | |
| 42 if (m_canUseCache) | |
| 43 m_displayItemList->createAndAppend<CachedDisplayItem>(m_client, DisplayI
tem::paintPhaseToCachedSubtreeType(m_paintPhase)); | |
| 44 else if (m_displayItemList->lastDisplayItemIsNoopBegin()) | |
| 45 m_displayItemList->removeLastDisplayItem(); | |
| 46 else | |
| 47 m_displayItemList->createAndAppend<EndSubtreeDisplayItem>(m_client, Disp
layItem::paintPhaseToEndSubtreeType(m_paintPhase)); | |
| 48 } | |
| 49 | |
| 50 bool SubtreeRecorder::canUseCache() const | |
| 51 { | |
| 52 #if ENABLE(ASSERT) | |
| 53 m_checkedCanUseCache = true; | |
| 54 #endif | |
| 55 return m_canUseCache; | |
| 56 } | |
| 57 | |
| 58 } // namespace blink | |
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Chromium Code Reviews
Issue 1313223002:
Simplify subtree (now subsequence) caching (Closed)
Base URL: svn://svn.chromium.org/blink/trunk