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/*
* Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "TiledImageOpenVG.h"
#include "FloatRect.h"
#include "IntRect.h"
#include "VGUtils.h"
namespace WebCore {
TiledImageOpenVG::TiledImageOpenVG(const IntSize& size, const IntSize& tileSize)
: SharedResourceOpenVG()
, m_size(size)
, m_maxTileSize(tileSize)
, m_numColumns((m_size.width() - 1) / m_maxTileSize.width() + 1)
, m_tiles(((m_size.height() - 1) / m_maxTileSize.height() + 1) * m_numColumns, VG_INVALID_HANDLE)
{
}
TiledImageOpenVG::TiledImageOpenVG(const TiledImageOpenVG& other)
: SharedResourceOpenVG()
, m_size(other.m_size)
, m_maxTileSize(other.m_maxTileSize)
, m_numColumns(other.m_numColumns)
, m_tiles(other.m_tiles)
{
detachTiles();
}
TiledImageOpenVG& TiledImageOpenVG::operator=(const TiledImageOpenVG& other)
{
if (&other != this) {
destroyTiles();
m_size = other.m_size;
m_maxTileSize = other.m_maxTileSize;
m_numColumns = other.m_numColumns;
m_tiles = other.m_tiles;
detachTiles();
}
return *this;
}
TiledImageOpenVG::~TiledImageOpenVG()
{
destroyTiles();
}
int TiledImageOpenVG::numTiles() const
{
return m_tiles.size();
}
int TiledImageOpenVG::numColumns() const
{
return m_numColumns;
}
int TiledImageOpenVG::numRows() const
{
return m_tiles.size() / m_numColumns;
}
void TiledImageOpenVG::setTile(int xIndex, int yIndex, VGImage image)
{
ASSERT(xIndex < m_numColumns);
int i = (yIndex * m_numColumns) + xIndex;
ASSERT(i < m_tiles.size());
m_tiles.at(i) = image;
}
IntRect TiledImageOpenVG::tilesInRect(const FloatRect& rect) const
{
int leftIndex = static_cast<int>(rect.x()) / m_maxTileSize.width();
int topIndex = static_cast<int>(rect.y()) / m_maxTileSize.height();
if (leftIndex < 0)
leftIndex = 0;
if (topIndex < 0)
topIndex = 0;
// Round rect edges up to get the outer pixel boundaries.
int rightIndex = (static_cast<int>(ceil(rect.right())) - 1) / m_maxTileSize.width();
int bottomIndex = (static_cast<int>(ceil(rect.bottom())) - 1) / m_maxTileSize.height();
int columns = (rightIndex - leftIndex) + 1;
int rows = (bottomIndex - topIndex) + 1;
return IntRect(leftIndex, topIndex,
(columns <= m_numColumns) ? columns : m_numColumns,
(rows <= (m_tiles.size() / m_numColumns)) ? rows : (m_tiles.size() / m_numColumns));
}
VGImage TiledImageOpenVG::tile(int xIndex, int yIndex) const
{
ASSERT(xIndex < m_numColumns);
int i = (yIndex * m_numColumns) + xIndex;
ASSERT(i < m_tiles.size());
return m_tiles.at(i);
}
IntRect TiledImageOpenVG::tileRect(int xIndex, int yIndex) const
{
ASSERT(xIndex < m_numColumns);
ASSERT((yIndex * m_numColumns) + xIndex < m_tiles.size());
int x = xIndex * m_maxTileSize.width();
int y = yIndex * m_maxTileSize.height();
return IntRect(x, y,
((m_maxTileSize.width() < m_size.width() - x) ? m_maxTileSize.width() : (m_size.width() - x)),
((m_maxTileSize.height() < m_size.height() - y) ? m_maxTileSize.height() : (m_size.height() - y)));
}
void TiledImageOpenVG::detachTiles()
{
makeSharedContextCurrent(); // because we create new images
int numTiles = m_tiles.size();
VGImage newTile, originalTile;
for (int i = 0; i < numTiles; ++i) {
originalTile = m_tiles.at(i);
if (originalTile == VG_INVALID_HANDLE)
continue;
VGImageFormat format = (VGImageFormat) vgGetParameteri(originalTile, VG_IMAGE_FORMAT);
VGint width = vgGetParameteri(originalTile, VG_IMAGE_WIDTH);
VGint height = vgGetParameteri(originalTile, VG_IMAGE_HEIGHT);
ASSERT_VG_NO_ERROR();
newTile = vgCreateImage(format, width, height, VG_IMAGE_QUALITY_FASTER);
ASSERT_VG_NO_ERROR();
vgCopyImage(newTile, 0, 0, originalTile, 0, 0, width, height, VG_FALSE /* dither */);
ASSERT_VG_NO_ERROR();
m_tiles.at(i) = newTile;
}
}
void TiledImageOpenVG::destroyTiles()
{
makeCompatibleContextCurrent();
Vector<VGImage>::const_iterator it = m_tiles.begin();
Vector<VGImage>::const_iterator end = m_tiles.end();
for (; it != end; ++it) {
if (*it != VG_INVALID_HANDLE)
vgDestroyImage(*it);
}
ASSERT_VG_NO_ERROR();
m_tiles.fill(VG_INVALID_HANDLE);
}
}
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