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/*
* Copyright (C) 2007-2009 Torch Mobile, Inc. All rights reserved.
* Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
*
* 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.
*/
#ifndef SharedBitmap_h
#define SharedBitmap_h
#include "AffineTransform.h"
#include "BitmapInfo.h"
#include "ColorSpace.h"
#include "GraphicsTypes.h"
#include <wtf/PassOwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/OwnArrayPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>
#include <wingdi.h>
namespace WebCore {
class FloatPoint;
class FloatRect;
class GraphicsContext;
class IntRect;
class IntSize;
class TransformationMatrix;
class SharedBitmap: public RefCounted<SharedBitmap> {
public:
~SharedBitmap();
static PassRefPtr<SharedBitmap> create(const IntSize&, BitmapInfo::BitCount = BitmapInfo::BitCount32, bool initPixels = true);
static PassRefPtr<SharedBitmap> create(const Vector<unsigned>&, const IntSize&, bool hasAlpha = true);
const BitmapInfo& bitmapInfo() const { return m_bmpInfo; }
void* bytes() { return m_pixels; }
const void* bytes() const { return m_pixels; }
unsigned width() const { return m_bmpInfo.width(); }
unsigned height() const { return m_bmpInfo.height(); }
unsigned validHeight() const { return m_validHeight; }
void setValidHeight(unsigned validHeight) { m_validHeight = validHeight; }
void resetPixels(bool black = false);
void clearPixels(const IntRect& r);
bool locked() const { return m_locked; }
void lock() { m_locked = true; }
void unlock() { m_locked = false; }
bool freeMemory();
bool is16bit() const { return m_bmpInfo.is16bit(); }
bool is32bit() const { return m_bmpInfo.is32bit(); }
bool to16bit();
bool hasAlpha() const { return m_hasAlpha; }
void setHasAlpha(bool alpha) { m_hasAlpha = alpha; }
bool ensureHandle();
HBITMAP getHandle() { return m_hbitmap.get(); }
PassOwnPtr<HBITMAP> createHandle(void** pixels, BitmapInfo* bmpInfo, int h = -1, bool use16bit = true) const;
bool usesTransparentColor() const { return m_usesTransparentColor; }
COLORREF transparentColor() const { return m_transparentColor; }
void setTransparentColor(COLORREF c)
{
m_usesTransparentColor = true;
m_transparentColor = c;
}
bool canUseDIBits() const { return !hasAlpha() && !usesTransparentColor(); }
PassOwnPtr<HBITMAP> clipBitmap(const IntRect& rect, bool useAlpha, BitmapInfo& bmpInfo, void*& pixels);
PassRefPtr<SharedBitmap> clipBitmap(const IntRect& rect, bool useAlpha);
void draw(GraphicsContext* ctxt, const IntRect& dstRect, const IntRect& srcRect, ColorSpace styleColorSpace, CompositeOperator compositeOp);
void drawPattern(GraphicsContext* ctxt, const FloatRect& tileRectIn, const AffineTransform& patternTransform,
const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator op, const FloatRect& destRect, const IntSize& origSourceSize);
void draw(HDC, const IntRect& dstRect, const IntRect& srcRect, CompositeOperator compositeOp);
void drawPattern(HDC, const AffineTransform&, const FloatRect& tileRectIn, const AffineTransform& patternTransform,
const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator op, const FloatRect& destRect, const IntSize& origSourceSize);
class DCProvider {
public:
virtual HDC getDC(SharedBitmap*, unsigned*);
virtual void releaseDC(SharedBitmap*, HDC, unsigned);
};
static DCProvider* s_dcProvider;
HDC getDC(unsigned* key1) { return s_dcProvider->getDC(this, key1); }
void releaseDC(HDC hdc, unsigned key1) { s_dcProvider->releaseDC(this, hdc, key1); }
class DCHolder {
public:
DCHolder(SharedBitmap* bmp = 0) { setInternal(bmp); }
~DCHolder() { clearInternal(); }
void set(SharedBitmap* bmp = 0)
{
clearInternal();
setInternal(bmp);
}
HDC get() const { return m_hdc; }
private:
DCHolder& operator=(const DCHolder&);
DCHolder(const DCHolder&);
void clearInternal()
{
if (m_hdc)
m_bitmap->releaseDC(m_hdc, m_key);
}
void setInternal(SharedBitmap* bmp)
{
m_bitmap = bmp;
m_hdc = bmp ? bmp->getDC(&m_key) : 0;
}
SharedBitmap* m_bitmap;
HDC m_hdc;
unsigned m_key;
};
private:
SharedBitmap(const IntSize&, BitmapInfo::BitCount, bool initPixels);
BitmapInfo m_bmpInfo;
OwnPtr<HBITMAP> m_hbitmap;
void* m_pixels;
OwnArrayPtr<unsigned> m_pixelData;
COLORREF m_transparentColor;
int m_validHeight;
bool m_locked;
bool m_usesTransparentColor;
bool m_hasAlpha;
};
} // namespace WebCore
#endif // SharedBitmap_h
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