cc/CCQuadCuller.cpp

   1 // Copyright 2012 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
   7 #if USE(ACCELERATED_COMPOSITING)
   8
   9 #include "CCQuadCuller.h"
  10
  11 #include "CCAppendQuadsData.h"
  12 #include "CCDebugBorderDrawQuad.h"
  13 #include "CCLayerImpl.h"
  14 #include "CCOcclusionTracker.h"
  15 #include "CCOverdrawMetrics.h"
  16 #include "CCRenderPass.h"
  17 #include "Region.h"
  18 #include "SkColor.h"
  19 #include <public/WebTransformationMatrix.h>
  20
  21 using namespace std;
  22
  23 namespace WebCore {
  24
  25 static const int debugTileBorderWidth = 1;
  26 static const int debugTileBorderAlpha = 120;
  27 static const int debugTileBorderColorRed = 160;
  28 static const int debugTileBorderColorGreen = 100;
  29 static const int debugTileBorderColorBlue = 0;
  30
  31 CCQuadCuller::CCQuadCuller(CCQuadList& quadList, CCSharedQuadStateList& sharedQuadStateList, CCLayerImpl* layer, const CCOcclusionTrackerImpl* occlusionTracker, bool showCullingWithDebugBorderQuads, bool forSurface)
  32     : m_quadList(quadList)
  33     , m_sharedQuadStateList(sharedQuadStateList)
  34     , m_currentSharedQuadState(0)
  35     , m_layer(layer)
  36     , m_occlusionTracker(occlusionTracker)
  37     , m_showCullingWithDebugBorderQuads(showCullingWithDebugBorderQuads)
  38     , m_forSurface(forSurface)
  39 {
  40 }
  41
  42 CCSharedQuadState* CCQuadCuller::useSharedQuadState(PassOwnPtr<CCSharedQuadState> passSharedQuadState)
  43 {
  44     OwnPtr<CCSharedQuadState> sharedQuadState(passSharedQuadState);
  45     sharedQuadState->id = m_sharedQuadStateList.size();
  46
  47     // FIXME: If all quads are culled for the sharedQuadState, we can drop it from the list.
  48     m_currentSharedQuadState = sharedQuadState.get();
  49     m_sharedQuadStateList.append(sharedQuadState.release());
  50     return m_currentSharedQuadState;
  51 }
  52
  53 static inline bool appendQuadInternal(PassOwnPtr<CCDrawQuad> passDrawQuad, const IntRect& culledRect, CCQuadList& quadList, const CCOcclusionTrackerImpl& occlusionTracker, bool createDebugBorderQuads)
  54 {
  55     OwnPtr<CCDrawQuad> drawQuad(passDrawQuad);
  56     bool keepQuad = !culledRect.isEmpty();
  57     if (keepQuad)
  58         drawQuad->setQuadVisibleRect(culledRect);
  59
  60     occlusionTracker.overdrawMetrics().didCullForDrawing(drawQuad->quadTransform(), drawQuad->quadRect(), culledRect);
  61     occlusionTracker.overdrawMetrics().didDraw(drawQuad->quadTransform(), culledRect, drawQuad->opaqueRect());
  62
  63     if (keepQuad) {
  64         if (createDebugBorderQuads && !drawQuad->isDebugQuad() && drawQuad->quadVisibleRect() != drawQuad->quadRect()) {
  65             SkColor borderColor = SkColorSetARGB(debugTileBorderAlpha, debugTileBorderColorRed, debugTileBorderColorGreen, debugTileBorderColorBlue);
  66             quadList.append(CCDebugBorderDrawQuad::create(drawQuad->sharedQuadState(), drawQuad->quadVisibleRect(), borderColor, debugTileBorderWidth));
  67         }
  68
  69         // Release the quad after we're done using it.
  70         quadList.append(drawQuad.release());
  71     }
  72     return keepQuad;
  73 }
  74
  75 bool CCQuadCuller::append(PassOwnPtr<CCDrawQuad> passDrawQuad, CCAppendQuadsData& appendQuadsData)
  76 {
  77     ASSERT(passDrawQuad->sharedQuadState() == m_currentSharedQuadState);
  78     ASSERT(passDrawQuad->sharedQuadStateId() == m_currentSharedQuadState->id);
  79     ASSERT(!m_sharedQuadStateList.isEmpty());
  80     ASSERT(m_sharedQuadStateList.last().get() == m_currentSharedQuadState);
  81
  82     IntRect culledRect;
  83     bool hasOcclusionFromOutsideTargetSurface;
  84
  85     if (m_forSurface)
  86         culledRect = m_occlusionTracker->unoccludedContributingSurfaceContentRect(m_layer, false, passDrawQuad->quadRect(), &hasOcclusionFromOutsideTargetSurface);
  87     else
  88         culledRect = m_occlusionTracker->unoccludedContentRect(m_layer, passDrawQuad->quadRect(), &hasOcclusionFromOutsideTargetSurface);
  89
  90     appendQuadsData.hadOcclusionFromOutsideTargetSurface |= hasOcclusionFromOutsideTargetSurface;
  91
  92     return appendQuadInternal(passDrawQuad, culledRect, m_quadList, *m_occlusionTracker, m_showCullingWithDebugBorderQuads);
  93 }
  94
  95 } // namespace WebCore
  96 #endif // USE(ACCELERATED_COMPOSITING)