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// Copyright 2012 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 "config.h"
#include "cc/quad_culler.h"
#include "Region.h"
#include "cc/append_quads_data.h"
#include "cc/debug_border_draw_quad.h"
#include "cc/layer_impl.h"
#include "cc/occlusion_tracker.h"
#include "cc/overdraw_metrics.h"
#include "cc/render_pass.h"
#include "third_party/skia/include/core/SkColor.h"
#include <public/WebTransformationMatrix.h>
using namespace std;
namespace cc {
static const int debugTileBorderWidth = 1;
static const int debugTileBorderAlpha = 120;
static const int debugTileBorderColorRed = 160;
static const int debugTileBorderColorGreen = 100;
static const int debugTileBorderColorBlue = 0;
QuadCuller::QuadCuller(QuadList& quadList, SharedQuadStateList& sharedQuadStateList, LayerImpl* layer, const OcclusionTrackerImpl* occlusionTracker, bool showCullingWithDebugBorderQuads, bool forSurface)
: m_quadList(quadList)
, m_sharedQuadStateList(sharedQuadStateList)
, m_currentSharedQuadState(0)
, m_layer(layer)
, m_occlusionTracker(occlusionTracker)
, m_showCullingWithDebugBorderQuads(showCullingWithDebugBorderQuads)
, m_forSurface(forSurface)
{
}
SharedQuadState* QuadCuller::useSharedQuadState(scoped_ptr<SharedQuadState> sharedQuadState)
{
sharedQuadState->id = m_sharedQuadStateList.size();
// FIXME: If all quads are culled for the sharedQuadState, we can drop it from the list.
m_currentSharedQuadState = sharedQuadState.get();
m_sharedQuadStateList.append(sharedQuadState.Pass());
return m_currentSharedQuadState;
}
static inline bool appendQuadInternal(scoped_ptr<DrawQuad> drawQuad, const IntRect& culledRect, QuadList& quadList, const OcclusionTrackerImpl& occlusionTracker, bool createDebugBorderQuads)
{
bool keepQuad = !culledRect.isEmpty();
if (keepQuad)
drawQuad->setQuadVisibleRect(culledRect);
occlusionTracker.overdrawMetrics().didCullForDrawing(drawQuad->quadTransform(), cc::IntRect(drawQuad->quadRect()), culledRect);
occlusionTracker.overdrawMetrics().didDraw(drawQuad->quadTransform(), culledRect, cc::IntRect(drawQuad->opaqueRect()));
if (keepQuad) {
if (createDebugBorderQuads && !drawQuad->isDebugQuad() && drawQuad->quadVisibleRect() != drawQuad->quadRect()) {
SkColor borderColor = SkColorSetARGB(debugTileBorderAlpha, debugTileBorderColorRed, debugTileBorderColorGreen, debugTileBorderColorBlue);
quadList.append(DebugBorderDrawQuad::create(drawQuad->sharedQuadState(), drawQuad->quadVisibleRect(), borderColor, debugTileBorderWidth).PassAs<DrawQuad>());
}
// Pass the quad after we're done using it.
quadList.append(drawQuad.Pass());
}
return keepQuad;
}
bool QuadCuller::append(scoped_ptr<DrawQuad> drawQuad, AppendQuadsData& appendQuadsData)
{
DCHECK(drawQuad->sharedQuadState() == m_currentSharedQuadState);
DCHECK(drawQuad->sharedQuadStateId() == m_currentSharedQuadState->id);
DCHECK(!m_sharedQuadStateList.isEmpty());
DCHECK(m_sharedQuadStateList.last() == m_currentSharedQuadState);
IntRect culledRect;
bool hasOcclusionFromOutsideTargetSurface;
if (m_forSurface)
culledRect = m_occlusionTracker->unoccludedContributingSurfaceContentRect(m_layer, false, cc::IntRect(drawQuad->quadRect()), &hasOcclusionFromOutsideTargetSurface);
else
culledRect = m_occlusionTracker->unoccludedContentRect(m_layer, cc::IntRect(drawQuad->quadRect()), &hasOcclusionFromOutsideTargetSurface);
appendQuadsData.hadOcclusionFromOutsideTargetSurface |= hasOcclusionFromOutsideTargetSurface;
return appendQuadInternal(drawQuad.Pass(), culledRect, m_quadList, *m_occlusionTracker, m_showCullingWithDebugBorderQuads);
}
} // namespace cc
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