summaryrefslogtreecommitdiff
path: root/vcl/inc/salbmp.hxx
blob: 5b020f617c4da8c6627762ed1bd871faf9a8864a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
/* -*- 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_INC_SALBMP_HXX
#define INCLUDED_VCL_INC_SALBMP_HXX

#include <tools/gen.hxx>
#include <tools/solar.h>
#include <vcl/checksum.hxx>
#include <vcl/salbtype.hxx>

#include <com/sun/star/rendering/XBitmapCanvas.hpp>

struct BitmapBuffer;
class Color;
class SalGraphics;
class BitmapPalette;
struct BitmapSystemData;
enum class BmpScaleFlag;

extern const sal_uLong nVCLRLut[ 6 ];
extern const sal_uLong nVCLGLut[ 6 ];
extern const sal_uLong nVCLBLut[ 6 ];
extern const sal_uLong nVCLDitherLut[ 256 ];
extern const sal_uLong nVCLLut[ 256 ];

class VCL_PLUGIN_PUBLIC SalBitmap
{
public:

    SalBitmap()
        : mnChecksum(0)
        , mbChecksumValid(false)
    {
    }

    virtual                 ~SalBitmap();

    virtual bool            Create( const Size& rSize,
                                    sal_uInt16 nBitCount,
                                    const BitmapPalette& rPal ) = 0;
    virtual bool            Create( const SalBitmap& rSalBmp ) = 0;
    virtual bool            Create( const SalBitmap& rSalBmp,
                                    SalGraphics* pGraphics ) = 0;
    virtual bool            Create( const SalBitmap& rSalBmp,
                                    sal_uInt16 nNewBitCount ) = 0;
    virtual bool            Create( const css::uno::Reference< css::rendering::XBitmapCanvas >& rBitmapCanvas,
                                    Size& rSize,
                                    bool bMask = false ) = 0;
    virtual void            Destroy() = 0;
    virtual Size            GetSize() const = 0;
    virtual sal_uInt16      GetBitCount() const = 0;

    virtual BitmapBuffer*   AcquireBuffer( BitmapAccessMode nMode ) = 0;
    virtual void            ReleaseBuffer( BitmapBuffer* pBuffer, BitmapAccessMode nMode ) = 0;
    virtual bool            GetSystemData( BitmapSystemData& rData ) = 0;

    virtual bool            ScalingSupported() const = 0;
    virtual bool            Scale( const double& rScaleX, const double& rScaleY, BmpScaleFlag nScaleFlag ) = 0;
    void                    DropScaledCache();

    virtual bool            Replace( const Color& rSearchColor, const Color& rReplaceColor, sal_uInt8 nTol ) = 0;

    virtual bool            ConvertToGreyscale()
    {
        return false;
    }

    void GetChecksum(BitmapChecksum& rChecksum) const
    {
        updateChecksum();
        if (!mbChecksumValid)
            rChecksum = 0; // back-compat
        else
            rChecksum = mnChecksum;
    }

    void InvalidateChecksum()
    {
        mbChecksumValid = false;
    }

protected:
    BitmapChecksum mnChecksum;
    bool           mbChecksumValid;

protected:
    virtual void updateChecksum() const
    {
        if (mbChecksumValid)
            return;

        BitmapChecksum nCrc = 0;
        SalBitmap* pThis = const_cast<SalBitmap*>(this);
        BitmapBuffer* pBuf = pThis->AcquireBuffer(BitmapAccessMode::Read);
        if (pBuf)
        {
            nCrc = pBuf->maPalette.GetChecksum();
            nCrc = vcl_get_checksum(nCrc, pBuf->mpBits, pBuf->mnScanlineSize * pBuf->mnHeight);
            pThis->ReleaseBuffer(pBuf, BitmapAccessMode::Read);
            pThis->mnChecksum = nCrc;
            pThis->mbChecksumValid = true;
        }
        else
        {
            pThis->mbChecksumValid = false;
        }
    }


};

#endif

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */