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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#ifndef INCLUDED_VCL_BITMAP_TOOLS_HXX
#define INCLUDED_VCL_BITMAP_TOOLS_HXX
#include <config_cairo_canvas.h>
#include <vcl/bitmapex.hxx>
#include <vcl/ImageTree.hxx>
#include <vcl/BitmapColor.hxx>
#if ENABLE_CAIRO_CANVAS
#include <vcl/cairo.hxx>
#endif
#include <basegfx/range/b2drectangle.hxx>
#include <o3tl/safeint.hxx>
#include <array>
class SvStream;
namespace basegfx { class B2DHomMatrix; }
namespace com { namespace sun { namespace star { namespace geometry { struct IntegerRectangle2D; } } } }
namespace vcl {
namespace bitmap {
typedef sal_uInt8 (*lookup_table)[256];
lookup_table VCL_DLLPUBLIC get_premultiply_table();
lookup_table VCL_DLLPUBLIC get_unpremultiply_table();
sal_uInt8 unpremultiply(sal_uInt8 c, sal_uInt8 a);
sal_uInt8 premultiply(sal_uInt8 c, sal_uInt8 a);
/**
* Intended to be used to feed into CreateFromData to create a BitmapEx. RGB data format.
*/
class VCL_DLLPUBLIC RawBitmap
{
friend BitmapEx VCL_DLLPUBLIC CreateFromData( RawBitmap&& rawBitmap );
std::unique_ptr<sal_uInt8[]> mpData;
Size const maSize;
sal_uInt8 const mnBitCount;
public:
RawBitmap(Size const & rSize, sal_uInt8 nBitCount)
: maSize(rSize),
mnBitCount(nBitCount)
{
assert(nBitCount == 24 || nBitCount == 32);
sal_Int32 nRowSize, nDataSize;
if (o3tl::checked_multiply<sal_Int32>(rSize.getWidth(), nBitCount/8, nRowSize) ||
o3tl::checked_multiply<sal_Int32>(nRowSize, rSize.getHeight(), nDataSize))
{
throw std::bad_alloc();
}
mpData.reset(new sal_uInt8[nDataSize]);
}
void SetPixel(long nY, long nX, Color nColor)
{
long p = (nY * maSize.getWidth() + nX) * (mnBitCount/8);
mpData[ p++ ] = nColor.GetRed();
mpData[ p++ ] = nColor.GetGreen();
mpData[ p++ ] = nColor.GetBlue();
if (mnBitCount == 32)
mpData[ p ] = nColor.GetTransparency();
}
Color GetPixel(long nY, long nX) const
{
long p = (nY * maSize.getWidth() + nX) * mnBitCount/8;
if (mnBitCount == 24)
return Color( mpData[p], mpData[p+1], mpData[p+2]);
else
return Color( mpData[p+3], mpData[p], mpData[p+1], mpData[p+2]);
}
// so we don't accidentally leave any code in that uses palette color indexes
void SetPixel(long nY, long nX, BitmapColor nColor) = delete;
long Height() { return maSize.Height(); }
long Width() { return maSize.Width(); }
sal_uInt8 GetBitCount() const { return mnBitCount; }
};
BitmapEx VCL_DLLPUBLIC loadFromName(const OUString& rFileName, const ImageLoadFlags eFlags = ImageLoadFlags::NONE);
void loadFromSvg(SvStream& rStream, const OUString& sPath, BitmapEx& rBitmapEx, double fScaleFactor);
/** Copy block of image data into the bitmap.
Assumes that the Bitmap has been constructed with the desired size.
@param pData
The block of data to copy
@param nStride
The number of bytes in a scanline, must be >= (width * nBitCount / 8)
*/
BitmapEx VCL_DLLPUBLIC CreateFromData( sal_uInt8 const *pData, sal_Int32 nWidth, sal_Int32 nHeight, sal_Int32 nStride, sal_uInt16 nBitCount );
BitmapEx VCL_DLLPUBLIC CreateFromData( RawBitmap && data );
#if ENABLE_CAIRO_CANVAS
VCL_DLLPUBLIC BitmapEx* CreateFromCairoSurface(Size size, cairo_surface_t* pSurface);
#endif
VCL_DLLPUBLIC BitmapEx CanvasTransformBitmap( const BitmapEx& rBitmap,
const ::basegfx::B2DHomMatrix& rTransform,
::basegfx::B2DRectangle const & rDestRect,
::basegfx::B2DHomMatrix const & rLocalTransform );
VCL_DLLPUBLIC void DrawAlphaBitmapAndAlphaGradient(BitmapEx & rBitmapEx, bool bFixedTransparence, float fTransparence, AlphaMask & rNewMask);
VCL_DLLPUBLIC void DrawAndClipBitmap(const Point& rPos, const Size& rSize, const BitmapEx& rBitmap, BitmapEx & aBmpEx, basegfx::B2DPolyPolygon const & rClipPath);
VCL_DLLPUBLIC css::uno::Sequence< sal_Int8 > GetMaskDIB(BitmapEx const & aBmpEx);
/**
* @param data will be filled with alpha data, if xBitmap is alpha/transparent image
* @param bHasAlpha will be set to true if resulting surface has alpha
**/
VCL_DLLPUBLIC void CanvasCairoExtractBitmapData( BitmapEx const & rBmpEx, Bitmap & rBitmap, unsigned char*& data, bool& bHasAlpha, long& rnWidth, long& rnHeight );
VCL_DLLPUBLIC css::uno::Sequence< sal_Int8 > CanvasExtractBitmapData(BitmapEx const & rBitmapEx, const css::geometry::IntegerRectangle2D& rect);
// helper to construct historical 8x8 bitmaps with two colors
BitmapEx VCL_DLLPUBLIC createHistorical8x8FromArray(std::array<sal_uInt8,64> const & pArray, Color aColorPix, Color aColorBack);
bool VCL_DLLPUBLIC isHistorical8x8(const BitmapEx& rBitmapEx, Color& o_rBack, Color& o_rFront);
VCL_DLLPUBLIC bool convertBitmap32To24Plus8(BitmapEx const & rInput, BitmapEx & rResult);
}} // end vcl::bitmap
#endif // INCLUDED_VCL_BITMAP_TOOLS_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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