vcl/inc/salbmp.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_VCL_INC_SALBMP_HXX
  21 #define INCLUDED_VCL_INC_SALBMP_HXX
  22
  23 #include <tools/gen.hxx>
  24 #include <tools/solar.h>
  25 #include <vcl/checksum.hxx>
  26 #include <vcl/BitmapAccessMode.hxx>
  27 #include <vcl/BitmapBuffer.hxx>
  28 #include <vcl/bitmap/BitmapTypes.hxx>
  29 #include <com/sun/star/rendering/XBitmapCanvas.hpp>
  30
  31 struct BitmapBuffer;
  32 class Color;
  33 class SalGraphics;
  34 class BitmapPalette;
  35 struct BitmapSystemData;
  36 enum class BmpScaleFlag;
  37
  38 extern const sal_uLong nVCLRLut[ 6 ];
  39 extern const sal_uLong nVCLGLut[ 6 ];
  40 extern const sal_uLong nVCLBLut[ 6 ];
  41 extern const sal_uLong nVCLDitherLut[ 256 ];
  42 extern const sal_uLong nVCLLut[ 256 ];
  43
  44 class VCL_PLUGIN_PUBLIC SalBitmap
  45 {
  46 public:
  47
  48     SalBitmap()
  49         : mnChecksum(0)
  50         , mbChecksumValid(false)
  51     {
  52     }
  53
  54     virtual                 ~SalBitmap();
  55
  56     virtual bool            Create( const Size& rSize,
  57                                     vcl::PixelFormat ePixelFormat,
  58                                     const BitmapPalette& rPal ) = 0;
  59     virtual bool            Create( const SalBitmap& rSalBmp ) = 0;
  60     virtual bool            Create( const SalBitmap& rSalBmp,
  61                                     SalGraphics* pGraphics ) = 0;
  62     virtual bool            Create( const SalBitmap& rSalBmp,
  63                                     vcl::PixelFormat eNewPixelFormat) = 0;
  64     virtual bool            Create( const css::uno::Reference< css::rendering::XBitmapCanvas >& rBitmapCanvas,
  65                                     Size& rSize,
  66                                     bool bMask = false ) = 0;
  67     virtual void            Destroy() = 0;
  68     virtual Size            GetSize() const = 0;
  69     virtual sal_uInt16      GetBitCount() const = 0;
  70
  71     virtual BitmapBuffer*   AcquireBuffer( BitmapAccessMode nMode ) = 0;
  72     virtual void            ReleaseBuffer( BitmapBuffer* pBuffer, BitmapAccessMode nMode ) = 0;
  73     virtual bool            GetSystemData( BitmapSystemData& rData ) = 0;
  74
  75     virtual bool            ScalingSupported() const = 0;
  76     virtual bool            Scale( const double& rScaleX, const double& rScaleY, BmpScaleFlag nScaleFlag ) = 0;
  77     void                    DropScaledCache();
  78
  79     virtual bool            Replace( const Color& rSearchColor, const Color& rReplaceColor, sal_uInt8 nTol ) = 0;
  80
  81     virtual bool            ConvertToGreyscale()
  82     {
  83         return false;
  84     }
  85     virtual bool            InterpretAs8Bit()
  86     {
  87         return false;
  88     }
  89
  90     virtual bool            Erase( const Color& /*color*/ )
  91     {
  92         return false;
  93     }
  94     // Optimized case for AlphaMask::BlendWith().
  95     virtual bool            AlphaBlendWith( const SalBitmap& /*rSalBmp*/ )
  96     {
  97         return false;
  98     }
  99
 100     void GetChecksum(BitmapChecksum& rChecksum) const
 101     {
 102         updateChecksum();
 103         if (!mbChecksumValid)
 104             rChecksum = 0; // back-compat
 105         else
 106             rChecksum = mnChecksum;
 107     }
 108
 109     void InvalidateChecksum()
 110     {
 111         mbChecksumValid = false;
 112     }
 113
 114 protected:
 115     BitmapChecksum mnChecksum;
 116     bool           mbChecksumValid;
 117
 118 protected:
 119     void updateChecksum() const;
 120     // helper function to convert data in 1,2,4 bpp formats to a 8/24/32bpp format
 121     enum class BitConvert
 122     {
 123         A8,
 124         RGBA,
 125         BGRA,
 126         LAST = BGRA
 127     };
 128     static std::unique_ptr< sal_uInt8[] > convertDataBitCount( const sal_uInt8* src,
 129         int width, int height, int bitCount, int bytesPerRow, const BitmapPalette& palette,
 130         BitConvert type );
 131 };
 132
 133 #endif
 134
 135 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */