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office-gobmx/include/vcl/bitmap.hxx
Noel Grandin 0dca402563 loplugin:constparam in vcl,svtools 
Change-Id: I7a3eb2bfda869e9e66db919f929ead60cf8890a4
Reviewed-on: https://gerrit.libreoffice.org/44209
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
2017-11-03 10:30:00 +01:00

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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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_VCL_BITMAP_HXX
#define INCLUDED_VCL_BITMAP_HXX
#include <tools/link.hxx>
#include <tools/solar.h>
#include <vcl/checksum.hxx>
#include <vcl/dllapi.h>
#include <vcl/mapmod.hxx>
#include <vcl/region.hxx>
#include <vcl/scopedbitmapaccess.hxx>
#include <o3tl/typed_flags_set.hxx>
class Color;
enum class BmpMirrorFlags
{
NONE = 0x00,
Horizontal = 0x01,
Vertical = 0x02,
};
namespace o3tl
{
template<> struct typed_flags<BmpMirrorFlags> : is_typed_flags<BmpMirrorFlags, 0x03> {};
}
enum class BmpScaleFlag
{
// Try to preferably use these.
Default = 1,
Fast,
BestQuality,
// Specific algorithms, use only if you really need to.
Interpolate,
Lanczos,
BiCubic,
BiLinear
};
enum class BmpDitherFlags
{
NONE = 0x0000,
Matrix = 0x0001,
Floyd = 0x0002,
Floyd16 = 0x0004,
};
namespace o3tl
{
template<> struct typed_flags<BmpDitherFlags> : is_typed_flags<BmpDitherFlags, 0x07> {};
}
#define BMP_COL_TRANS Color( 252, 3, 251 )
enum class BmpConversion
{
NNONE,
N1BitThreshold,
N4BitGreys,
N4BitColors,
N8BitGreys,
N8BitColors,
N24Bit,
N8BitTrans,
Ghosted
};
enum class BmpCombine
{
Or, And
};
enum BmpReduce
{
BMP_REDUCE_SIMPLE = 0,
BMP_REDUCE_POPULAR = 1
};
enum class BmpFilter
{
Smooth = 0,
Sharpen = 1,
RemoveNoise = 2,
SobelGrey = 3,
EmbossGrey = 4,
Solarize = 5,
Sepia = 6,
Mosaic = 7,
PopArt = 8,
DuoTone = 9,
Unknown = 65535
};
class VCL_DLLPUBLIC BmpFilterParam
{
public:
BmpFilterParam( sal_uLong nProgressStart = 0, sal_uLong nProgressEnd = 0 ) :
meFilter( BmpFilter::Unknown ), mnProgressStart( nProgressStart ), mnProgressEnd( nProgressEnd ) {}
BmpFilterParam( sal_uInt8 cSolarGreyThreshold, sal_uLong nProgressStart = 0, sal_uLong nProgressEnd = 0 ) :
meFilter( BmpFilter::Solarize ), mnProgressStart( nProgressStart ), mnProgressEnd( nProgressEnd ),
mcSolarGreyThreshold( cSolarGreyThreshold ) {}
BmpFilterParam( double nRadius, sal_uLong nProgressStart = 0, sal_uLong nProgressEnd = 0 ) :
meFilter( BmpFilter::Smooth ), mnProgressStart( nProgressStart ), mnProgressEnd( nProgressEnd ),
mnRadius( nRadius ) {}
BmpFilterParam( sal_uInt16 nSepiaPercent, sal_uLong nProgressStart = 0, sal_uLong nProgressEnd = 0 ) :
meFilter( BmpFilter::Sepia ), mnProgressStart( nProgressStart ), mnProgressEnd( nProgressEnd ),
mnSepiaPercent( nSepiaPercent )
{
assert(nSepiaPercent<=100);
}
BmpFilterParam( const Size& rMosaicTileSize, sal_uLong nProgressStart = 0, sal_uLong nProgressEnd = 0 ) :
meFilter( BmpFilter::Mosaic ), mnProgressStart( nProgressStart ), mnProgressEnd( nProgressEnd )
{
maMosaicTileSize.mnTileWidth = rMosaicTileSize.Width();
maMosaicTileSize.mnTileHeight= rMosaicTileSize.Height();
}
BmpFilterParam( sal_uInt16 nEmbossAzimuthAngle100, sal_uInt16 nEmbossElevationAngle100,
sal_uLong nProgressStart = 0, sal_uLong nProgressEnd = 0 ) :
meFilter( BmpFilter::EmbossGrey ), mnProgressStart( nProgressStart ), mnProgressEnd( nProgressEnd )
{
maEmbossAngles.mnAzimuthAngle100 = nEmbossAzimuthAngle100;
maEmbossAngles.mnElevationAngle100 = nEmbossElevationAngle100;
}
private:
friend class ::Bitmap;
friend class BitmapEx;
friend class Animation;
private:
BmpFilter meFilter;
sal_uLong mnProgressStart;
sal_uLong mnProgressEnd;
public:
struct MosaicTileSize
{
sal_uLong mnTileWidth;
sal_uLong mnTileHeight;
};
struct EmbossAngles
{
sal_uInt16 mnAzimuthAngle100;
sal_uInt16 mnElevationAngle100;
};
private:
union
{
sal_uInt16 mnSepiaPercent;
sal_uInt8 mcSolarGreyThreshold;
double mnRadius;
MosaicTileSize maMosaicTileSize;
EmbossAngles maEmbossAngles;
};
};
class BitmapInfoAccess;
class BitmapReadAccess;
class BitmapWriteAccess;
class BitmapPalette;
class ImpBitmap;
class Color;
class GDIMetaFile;
class AlphaMask;
class OutputDevice;
class SalBitmap;
namespace vcl
{
class Kernel;
}
struct BitmapSystemData
{
#if defined(_WIN32)
void* pDIB; // device independent byte buffer
void* pDDB; // if not NULL then this is actually an HBITMAP
#elif defined( MACOSX ) || defined( IOS )
void* rImageContext; //Image context (CGContextRef)
#else
void* aPixmap;
#endif
int mnWidth;
int mnHeight;
};
class VCL_DLLPUBLIC Bitmap
{
public:
Bitmap();
Bitmap( const Bitmap& rBitmap );
Bitmap( const Size& rSizePixel, sal_uInt16 nBitCount, const BitmapPalette* pPal = nullptr );
Bitmap( SalBitmap* pSalBitmap );
virtual ~Bitmap();
Bitmap& operator=( const Bitmap& rBitmap );
Bitmap& operator=( Bitmap&& rBitmap );
inline bool operator!() const;
bool operator==( const Bitmap& rBitmap ) const;
bool operator!=( const Bitmap& rBitmap ) const { return !operator==(rBitmap); }
// only compares if we are using the same internal copy-on-write Impl class
bool ShallowEquals( const Bitmap& rBitmap ) const { return mxImpBmp == rBitmap.mxImpBmp; }
inline bool IsEmpty() const;
void SetEmpty();
inline const MapMode& GetPrefMapMode() const;
inline void SetPrefMapMode( const MapMode& rMapMode );
inline const Size& GetPrefSize() const;
inline void SetPrefSize( const Size& rSize );
Size GetSizePixel() const;
sal_uInt16 GetBitCount() const;
inline sal_uLong GetColorCount() const;
inline sal_uLong GetSizeBytes() const;
bool HasGreyPalette() const;
/** get system dependent bitmap data
@param rData
The system dependent BitmapSystemData structure to be filled
@return true if the bitmap has a valid system object (e.g. not empty)
*/
bool GetSystemData( BitmapSystemData& rData ) const;
BitmapChecksum GetChecksum() const;
Bitmap CreateDisplayBitmap( OutputDevice* pDisplay );
static const BitmapPalette&
GetGreyPalette( int nEntries );
public:
bool MakeMono( sal_uInt8 cThreshold );
/** Convert bitmap format
@param eConversion
The format this bitmap should be converted to.
@return true, if the conversion was completed successfully.
*/
bool Convert( BmpConversion eConversion );
/** Reduce number of colors for the bitmap
@param nNewColorCount
Maximal number of bitmap colors after the reduce operation
@param eReduce
Algorithm to use for color reduction
@return true, if the color reduction operation was completed successfully.
*/
bool ReduceColors(
sal_uInt16 nNewColorCount,
BmpReduce eReduce = BMP_REDUCE_SIMPLE );
/** Apply a dither algorithm to the bitmap
This method dithers the bitmap inplace, i.e. a true color
bitmap is converted to a paletted bitmap, reducing the color
deviation by error diffusion.
@param nDitherFlags
The algorithm to be used for dithering
*/
bool Dither( BmpDitherFlags nDitherFlags = BmpDitherFlags::Matrix );
/** Crop the bitmap
@param rRectPixel
A rectangle specifying the crop amounts on all four sides of
the bitmap. If the upper left corner of the bitmap is assigned
(0,0), then this method cuts out the given rectangle from the
bitmap. Note that the rectangle is clipped to the bitmap's
dimension, i.e. negative left,top rectangle coordinates or
exceeding width or height is ignored.
@return true, if cropping was performed successfully. If
nothing had to be cropped, because e.g. the crop rectangle
included the bitmap, false is returned, too!
*/
bool Crop( const tools::Rectangle& rRectPixel );
/** Expand the bitmap by pixel padding
@param nDX
Number of pixel to pad at the right border of the bitmap
@param nDY
Number of scanlines to pad at the bottom border of the bitmap
@param pInitColor
Color to use for padded pixel
@return true, if padding was performed successfully. false is
not only returned when the operation failed, but also if
nothing had to be done, e.g. because nDX and nDY were zero.
*/
bool Expand(
sal_uLong nDX, sal_uLong nDY,
const Color* pInitColor = nullptr );
/** Copy a rectangular area from another bitmap
@param rRectDst
Destination rectangle in this bitmap. This is clipped to the
bitmap dimensions.
@param rRectSrc
Source rectangle in pBmpSrc. This is clipped to the source
bitmap dimensions. Note further that no scaling takes place
during this copy operation, i.e. only the minimum of source
and destination rectangle's width and height are used.
@param pBmpSrc
The source bitmap to copy from. If this argument is NULL, or
equal to the object this method is called on, copying takes
place within the same bitmap.
@return true, if the operation completed successfully. false
is not only returned when the operation failed, but also if
nothing had to be done, e.g. because one of the rectangles are
empty.
*/
bool CopyPixel(
const tools::Rectangle& rRectDst,
const tools::Rectangle& rRectSrc,
const Bitmap* pBmpSrc = nullptr );
bool CopyPixel_AlphaOptimized(
const tools::Rectangle& rRectDst,
const tools::Rectangle& rRectSrc,
const Bitmap* pBmpSrc );
/** Perform boolean operations with another bitmap
@param rMask
The mask bitmap in the selected combine operation
@param eCombine
The combine operation to perform on the bitmap
@return true, if the operation was completed successfully.
*/
bool CombineSimple(
const Bitmap& rMask,
BmpCombine eCombine );
/** Alpha-blend the given bitmap against a specified uniform
background color.
@attention This method might convert paletted bitmaps to
truecolor, to be able to represent every necessary color. Note
that during alpha blending, lots of colors not originally
included in the bitmap can be generated.
@param rAlpha
Alpha mask to blend with
@param rBackgroundColor
Background color to use for every pixel during alpha blending
@return true, if blending was successful, false otherwise
*/
bool Blend(
const AlphaMask& rAlpha,
const Color& rBackgroundColor );
/** Fill the entire bitmap with the given color
@param rFillColor
Color value to use for filling
@return true, if the operation was completed successfully.
*/
bool Erase( const Color& rFillColor );
/** Perform the Invert operation on every pixel
@return true, if the operation was completed successfully.
*/
bool Invert();
/** Mirror the bitmap
@param nMirrorFlags
About which axis (horizontal, vertical, or both) to mirror
@return true, if the operation was completed successfully.
*/
bool Mirror( BmpMirrorFlags nMirrorFlags );
/** Scale the bitmap
@param rNewSize
The resulting size of the scaled bitmap
@param nScaleFlag
The algorithm to be used for scaling
@return true, if the operation was completed successfully.
*/
bool Scale( const Size& rNewSize, BmpScaleFlag nScaleFlag = BmpScaleFlag::Default );
/** Scale the bitmap
@param rScaleX
The scale factor in x direction.
@param rScaleY
The scale factor in y direction.
@param nScaleFlag
Method of scaling - it is recommended that either BmpScaleFlag::Default or BmpScaleFlag::BestQuality be used.
@return true, if the operation was completed successfully.
*/
bool Scale( const double& rScaleX, const double& rScaleY, BmpScaleFlag nScaleFlag = BmpScaleFlag::Default );
/**
Returns true if bitmap scaling is considered to be fast.
Currently this returns true if OpenGL is used for scaling, otherwise false (CPU scaling is slower).
@since 4.5
*/
static bool HasFastScale();
// Adapt the BitCount of rNew to BitCount of total, including grey or color palette
// Can be used to create alpha/mask bitmaps after their processing in 24bit
void AdaptBitCount(Bitmap& rNew) const;
/** Rotate bitmap by the specified angle
@param nAngle10
The rotation angle in tenth of a degree. The bitmap is always rotated around its center.
@param rFillColor
The color to use for filling blank areas. During rotation, the
bitmap is enlarged such that the whole rotation result fits
in. The empty spaces around that rotated original bitmap are
then filled with this color.
@return true, if the operation was completed successfully.
*/
bool Rotate( long nAngle10, const Color& rFillColor );
/** Create on-off mask from bitmap
This method creates a bitmask from the bitmap, where every
pixel that equals rTransColor is set transparent, the rest
opaque.
@param rTransColor
Color value where the bitmask should be transparent
@param nTol
Tolerance value. Specifies the maximal difference between
rTransColor and the individual pixel values, such that the
corresponding pixel is still regarded transparent.
@return the resulting bitmask.
*/
Bitmap CreateMask( const Color& rTransColor, sal_uLong nTol = 0 ) const;
/** Create region of similar colors in a given rectangle
@param rColor
All pixel which have this color are included in the calculated region
@param rRect
The rectangle within which matching pixel are looked for. This
rectangle is always clipped to the bitmap dimensions.
@return the generated region.
*/
vcl::Region CreateRegion( const Color& rColor, const tools::Rectangle& rRect ) const;
/** Replace all pixel where the given mask is on with the specified color
@param rMask
Mask specifying which pixel should be replaced
@param rReplaceColor
Color to be placed in all changed pixel
@return true, if the operation was completed successfully.
*/
bool Replace( const Bitmap& rMask, const Color& rReplaceColor );
/** Merge bitmap with given background color according to specified alpha mask
@param rAlpha
Alpha mask specifying the amount of background color to merge in
@param rMergeColor
Background color to be used for merging
@return true, if the operation was completed successfully.
*/
bool Replace( const AlphaMask& rAlpha, const Color& rMergeColor );
/** Replace all pixel having the search color with the specified color
@param rSearchColor
Color specifying which pixel should be replaced
@param rReplaceColor
Color to be placed in all changed pixel
@param nTol
Tolerance value. Specifies the maximal difference between
rSearchColor and the individual pixel values, such that the
corresponding pixel is still regarded a match.
@return true, if the operation was completed successfully.
*/
bool Replace( const Color& rSearchColor, const Color& rReplaceColor, sal_uLong nTol = 0 );
/** Replace all pixel having one the search colors with the corresponding replace color
@param pSearchColors
Array of colors specifying which pixel should be replaced
@param rReplaceColors
Array of colors to be placed in all changed pixel
@param nColorCount
Size of the aforementioned color arrays
@param pTols
Tolerance value. Specifies the maximal difference between
pSearchColor colors and the individual pixel values, such that
the corresponding pixel is still regarded a match.
@return true, if the operation was completed successfully.
*/
bool Replace(
const Color* pSearchColors,
const Color* rReplaceColors,
sal_uLong nColorCount,
sal_uLong* pTols = nullptr );
/** Convert the bitmap to a meta file
This works by putting continuous areas of the same color into
polygons painted in this color, by tracing the area's bounding
line.
@param rMtf
The resulting meta file
@param cReduce
If non-null, minimal size of bound rects for individual polygons. Smaller ones are ignored.
@param pProgress
A callback for showing the progress of the vectorization
@return true, if the operation was completed successfully.
*/
bool Vectorize(
GDIMetaFile& rMtf,
sal_uInt8 cReduce,
const Link<long,void>* pProgress );
/** Change various global color characteristics
@param nLuminancePercent
Percent of luminance change, valid range [-100,100]. Values outside this range are clipped to the valid range.
@param nContrastPercent
Percent of contrast change, valid range [-100,100]. Values outside this range are clipped to the valid range.
@param nChannelRPercent
Percent of red channel change, valid range [-100,100]. Values outside this range are clipped to the valid range.
@param nChannelGPercent
Percent of green channel change, valid range [-100,100]. Values outside this range are clipped to the valid range.
@param nChannelBPercent
Percent of blue channel change, valid range [-100,100]. Values outside this range are clipped to the valid range.
@param fGamma
Exponent of the gamma function applied to the bitmap. The
value 1.0 results in no change, the valid range is
(0.0,10.0]. Values outside this range are regarded as 1.0.
@param bInvert
If true, invert the channel values with the logical 'not' operator
@param msoBrightness
Use the same formula for brightness as used by MSOffice.
@return true, if the operation was completed successfully.
*/
bool Adjust(
short nLuminancePercent,
short nContrastPercent = 0,
short nChannelRPercent = 0,
short nChannelGPercent = 0,
short nChannelBPercent = 0,
double fGamma = 1.0,
bool bInvert = false,
bool msoBrightness = false );
/** Apply specified filter to the bitmap
@param eFilter
The filter algorithm to apply
@param pFilterParam
Various parameter for the different bitmap filter algorithms
@return true, if the operation was completed successfully.
*/
bool Filter(
BmpFilter eFilter,
const BmpFilterParam* pFilterParam = nullptr );
public:
SAL_DLLPRIVATE void ImplMakeUnique();
const std::shared_ptr<ImpBitmap>& ImplGetImpBitmap() const { return mxImpBmp; }
SAL_DLLPRIVATE void ImplSetImpBitmap( const std::shared_ptr<ImpBitmap>& xImpBmp );
SAL_DLLPRIVATE void ImplAssignWithSize( const Bitmap& rBitmap );
SAL_DLLPRIVATE void ImplAdaptBitCount(Bitmap& rNew) const;
SAL_DLLPRIVATE bool ImplScaleFast( const double& rScaleX, const double& rScaleY );
SAL_DLLPRIVATE bool ImplScaleInterpolate( const double& rScaleX, const double& rScaleY );
SAL_DLLPRIVATE bool ImplConvolutionPass(
Bitmap& aNewBitmap,
BitmapReadAccess const * pReadAcc,
int aNumberOfContributions,
const double* pWeights,
int const * pPixels,
const int* pCount );
SAL_DLLPRIVATE bool ImplMakeMono( sal_uInt8 cThreshold );
SAL_DLLPRIVATE bool ImplMakeGreyscales( sal_uInt16 nGreyscales );
SAL_DLLPRIVATE bool ImplConvertUp( sal_uInt16 nBitCount, Color const * pExtColor = nullptr );
SAL_DLLPRIVATE bool ImplConvertDown( sal_uInt16 nBitCount, Color const * pExtColor = nullptr );
SAL_DLLPRIVATE bool ImplConvertGhosted();
SAL_DLLPRIVATE bool ImplDitherMatrix();
SAL_DLLPRIVATE bool ImplDitherFloyd();
SAL_DLLPRIVATE bool ImplDitherFloyd16();
SAL_DLLPRIVATE bool ImplReduceSimple( sal_uInt16 nColorCount );
SAL_DLLPRIVATE bool ImplReducePopular( sal_uInt16 nColorCount );
SAL_DLLPRIVATE bool ImplReduceMedian( sal_uInt16 nColorCount );
SAL_DLLPRIVATE void ImplMedianCut(
sal_uLong* pColBuf,
BitmapPalette& rPal,
long nR1, long nR2, long nG1, long nG2, long nB1, long nB2,
long nColors, long nPixels, long& rIndex );
SAL_DLLPRIVATE bool ImplConvolute3( const long* pMatrix );
SAL_DLLPRIVATE bool ImplMedianFilter();
SAL_DLLPRIVATE bool ImplSobelGrey();
SAL_DLLPRIVATE bool ImplEmbossGrey( const BmpFilterParam* pFilterParam );
SAL_DLLPRIVATE bool ImplSolarize( const BmpFilterParam* pFilterParam );
SAL_DLLPRIVATE bool ImplSepia( const BmpFilterParam* pFilterParam );
SAL_DLLPRIVATE bool ImplMosaic( const BmpFilterParam* pFilterParam );
SAL_DLLPRIVATE bool ImplPopArt();
SAL_DLLPRIVATE bool ImplSeparableBlurFilter( const double aRadius );
SAL_DLLPRIVATE bool ImplSeparableUnsharpenFilter( const double aRadius );
SAL_DLLPRIVATE bool ImplDuotoneFilter( const sal_uLong nColorOne, sal_uLong nColorTwo );
SAL_DLLPRIVATE static void ImplBlurContributions(
const int aSize,
const int aNumberOfContributions,
const double* pBlurVector,
double*& pWeights,
int*& pPixels,
int*& pCount );
public:
BitmapInfoAccess* AcquireInfoAccess();
BitmapReadAccess* AcquireReadAccess();
BitmapWriteAccess* AcquireWriteAccess();
static void ReleaseAccess( BitmapInfoAccess* pAccess );
typedef vcl::ScopedBitmapAccess<BitmapReadAccess, Bitmap, &Bitmap::AcquireReadAccess> ScopedReadAccess;
typedef vcl::ScopedBitmapAccess<BitmapWriteAccess, Bitmap, &Bitmap::AcquireWriteAccess> ScopedWriteAccess;
typedef vcl::ScopedBitmapAccess<BitmapInfoAccess, Bitmap, &Bitmap::AcquireInfoAccess> ScopedInfoAccess;
private:
std::shared_ptr<ImpBitmap> mxImpBmp;
MapMode maPrefMapMode;
Size maPrefSize;
};
inline bool Bitmap::operator!() const
{
return( mxImpBmp == nullptr );
}
inline bool Bitmap::IsEmpty() const
{
return( mxImpBmp == nullptr );
}
inline const MapMode& Bitmap::GetPrefMapMode() const
{
return maPrefMapMode;
}
inline void Bitmap::SetPrefMapMode( const MapMode& rMapMode )
{
maPrefMapMode = rMapMode;
}
inline const Size& Bitmap::GetPrefSize() const
{
return maPrefSize;
}
inline void Bitmap::SetPrefSize( const Size& rSize )
{
maPrefSize = rSize;
}
inline sal_uLong Bitmap::GetColorCount() const
{
return( (sal_uLong)1 << (sal_uLong) GetBitCount() );
}
inline sal_uLong Bitmap::GetSizeBytes() const
{
const Size aSizePix( GetSizePixel() );
return( ( (sal_uLong) aSizePix.Width() * aSizePix.Height() * GetBitCount() ) >> 3 );
}
#endif // INCLUDED_VCL_BITMAP_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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