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// Copyright 2011 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"
#if USE(ACCELERATED_COMPOSITING)
#include "CCLayerTilingData.h"
using namespace std;
namespace cc {
PassOwnPtr<CCLayerTilingData> CCLayerTilingData::create(const IntSize& tileSize, BorderTexelOption border)
{
return adoptPtr(new CCLayerTilingData(tileSize, border));
}
CCLayerTilingData::CCLayerTilingData(const IntSize& tileSize, BorderTexelOption border)
: m_tilingData(tileSize, IntSize(), border == HasBorderTexels)
{
setTileSize(tileSize);
}
void CCLayerTilingData::setTileSize(const IntSize& size)
{
if (tileSize() == size)
return;
reset();
m_tilingData.setMaxTextureSize(size);
}
IntSize CCLayerTilingData::tileSize() const
{
return m_tilingData.maxTextureSize();
}
void CCLayerTilingData::setBorderTexelOption(BorderTexelOption borderTexelOption)
{
bool borderTexels = borderTexelOption == HasBorderTexels;
if (hasBorderTexels() == borderTexels)
return;
reset();
m_tilingData.setHasBorderTexels(borderTexels);
}
const CCLayerTilingData& CCLayerTilingData::operator=(const CCLayerTilingData& tiler)
{
m_tilingData = tiler.m_tilingData;
return *this;
}
void CCLayerTilingData::addTile(PassOwnPtr<Tile> tile, int i, int j)
{
ASSERT(!tileAt(i, j));
tile->moveTo(i, j);
m_tiles.add(make_pair(i, j), tile);
}
PassOwnPtr<CCLayerTilingData::Tile> CCLayerTilingData::takeTile(int i, int j)
{
return m_tiles.take(make_pair(i, j));
}
CCLayerTilingData::Tile* CCLayerTilingData::tileAt(int i, int j) const
{
return m_tiles.get(make_pair(i, j));
}
void CCLayerTilingData::reset()
{
m_tiles.clear();
}
void CCLayerTilingData::contentRectToTileIndices(const IntRect& contentRect, int& left, int& top, int& right, int& bottom) const
{
// An empty rect doesn't result in an empty set of tiles, so don't pass an empty rect.
// FIXME: Possibly we should fill a vector of tiles instead,
// since the normal use of this function is to enumerate some tiles.
ASSERT(!contentRect.isEmpty());
left = m_tilingData.tileXIndexFromSrcCoord(contentRect.x());
top = m_tilingData.tileYIndexFromSrcCoord(contentRect.y());
right = m_tilingData.tileXIndexFromSrcCoord(contentRect.maxX() - 1);
bottom = m_tilingData.tileYIndexFromSrcCoord(contentRect.maxY() - 1);
}
IntRect CCLayerTilingData::tileRect(const Tile* tile) const
{
IntRect tileRect = m_tilingData.tileBoundsWithBorder(tile->i(), tile->j());
tileRect.setSize(tileSize());
return tileRect;
}
Region CCLayerTilingData::opaqueRegionInContentRect(const IntRect& contentRect) const
{
if (contentRect.isEmpty())
return Region();
Region opaqueRegion;
int left, top, right, bottom;
contentRectToTileIndices(contentRect, left, top, right, bottom);
for (int j = top; j <= bottom; ++j) {
for (int i = left; i <= right; ++i) {
Tile* tile = tileAt(i, j);
if (!tile)
continue;
IntRect tileOpaqueRect = intersection(contentRect, tile->opaqueRect());
opaqueRegion.unite(tileOpaqueRect);
}
}
return opaqueRegion;
}
void CCLayerTilingData::setBounds(const IntSize& size)
{
m_tilingData.setTotalSize(size);
if (size.isEmpty()) {
m_tiles.clear();
return;
}
// Any tiles completely outside our new bounds are invalid and should be dropped.
int left, top, right, bottom;
contentRectToTileIndices(IntRect(IntPoint(), size), left, top, right, bottom);
Vector<TileMapKey> invalidTileKeys;
for (TileMap::const_iterator it = m_tiles.begin(); it != m_tiles.end(); ++it) {
#if WTF_NEW_HASHMAP_ITERATORS_INTERFACE
if (it->key.first > right || it->key.second > bottom)
invalidTileKeys.append(it->key);
#else
if (it->first.first > right || it->first.second > bottom)
invalidTileKeys.append(it->first);
#endif
}
for (size_t i = 0; i < invalidTileKeys.size(); ++i)
m_tiles.remove(invalidTileKeys[i]);
}
IntSize CCLayerTilingData::bounds() const
{
return m_tilingData.totalSize();
}
} // namespace cc
#endif // USE(ACCELERATED_COMPOSITING)
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