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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 .
*/
#pragma once
#include <vcl/dllapi.h>
#include <vcl/bitmap.hxx>
#include <vcl/Scanline.hxx>
#include <vcl/BitmapBuffer.hxx>
#include <vcl/BitmapColor.hxx>
#include <vcl/BitmapAccessMode.hxx>
bool Bitmap32IsPreMultipled();
typedef BitmapColor (*FncGetPixel)(ConstScanline pScanline, tools::Long nX, const ColorMask& rMask);
typedef void (*FncSetPixel)(Scanline pScanline, tools::Long nX, const BitmapColor& rBitmapColor,
const ColorMask& rMask);
class VCL_DLLPUBLIC BitmapInfoAccess
{
friend class BitmapReadAccess;
public:
BitmapInfoAccess(const Bitmap& rBitmap, BitmapAccessMode nMode = BitmapAccessMode::Info);
BitmapInfoAccess(const AlphaMask& rBitmap, BitmapAccessMode nMode = BitmapAccessMode::Info);
virtual ~BitmapInfoAccess();
bool operator!() const { return mpBuffer == nullptr; }
explicit operator bool() const { return mpBuffer != nullptr; }
tools::Long Width() const { return mpBuffer ? mpBuffer->mnWidth : 0L; }
tools::Long Height() const { return mpBuffer ? mpBuffer->mnHeight : 0L; }
bool IsTopDown() const
{
assert(mpBuffer && "Access is not valid!");
return mpBuffer && (mpBuffer->mnFormat & ScanlineFormat::TopDown);
}
bool IsBottomUp() const { return !IsTopDown(); }
ScanlineFormat GetScanlineFormat() const
{
assert(mpBuffer && "Access is not valid!");
return mpBuffer ? RemoveScanline(mpBuffer->mnFormat) : ScanlineFormat::NONE;
}
sal_uInt32 GetScanlineSize() const
{
assert(mpBuffer && "Access is not valid!");
return mpBuffer ? mpBuffer->mnScanlineSize : 0;
}
sal_uInt16 GetBitCount() const
{
assert(mpBuffer && "Access is not valid!");
return mpBuffer ? mpBuffer->mnBitCount : 0;
}
/// Returns the BitmapColor (i.e. palette index) that is either an exact match
/// of the required color, or failing that, the entry that is the closest i.e. least error
/// as measured by Color::GetColorError.
BitmapColor GetBestMatchingColor(const BitmapColor& rBitmapColor) const
{
if (HasPalette())
return BitmapColor(static_cast<sal_uInt8>(GetBestPaletteIndex(rBitmapColor)));
else
return rBitmapColor;
}
bool HasPalette() const
{
const BitmapBuffer* pBuffer = mpBuffer;
assert(pBuffer && "Access is not valid!");
return pBuffer && !!pBuffer->maPalette;
}
const BitmapPalette& GetPalette() const
{
const BitmapBuffer* pBuffer = mpBuffer;
assert(pBuffer && "Access is not valid!");
return pBuffer->maPalette;
}
sal_uInt16 GetPaletteEntryCount() const
{
const BitmapBuffer* pBuffer = mpBuffer;
assert(HasPalette() && "Bitmap has no palette!");
return HasPalette() ? pBuffer->maPalette.GetEntryCount() : 0;
}
const BitmapColor& GetPaletteColor(sal_uInt16 nColor) const
{
const BitmapBuffer* pBuffer = mpBuffer;
assert(pBuffer && "Access is not valid!");
assert(HasPalette() && "Bitmap has no palette!");
return pBuffer->maPalette[nColor];
}
/// Returns the BitmapColor (i.e. palette index) that is either an exact match
/// of the required color, or failing that, the entry that is the closest i.e. least error
/// as measured by Color::GetColorError.
sal_uInt16 GetBestPaletteIndex(const BitmapColor& rBitmapColor) const;
/// Returns the BitmapColor (i.e. palette index) that is an exact match
/// of the required color. Returns SAL_MAX_UINT16 if nothing found.
sal_uInt16 GetMatchingPaletteIndex(const BitmapColor& rBitmapColor) const;
const ColorMask& GetColorMask() const
{
const BitmapBuffer* pBuffer = mpBuffer;
assert(pBuffer && "Access is not valid!");
return pBuffer->maColorMask;
}
private:
BitmapInfoAccess(const BitmapInfoAccess&) = delete;
BitmapInfoAccess& operator=(const BitmapInfoAccess&) = delete;
protected:
Bitmap maBitmap;
BitmapBuffer* mpBuffer;
ColorMask maColorMask;
BitmapAccessMode mnAccessMode;
};
class BitmapScopedInfoAccess
{
public:
BitmapScopedInfoAccess(const Bitmap& rBitmap)
: moAccess(rBitmap)
{
}
BitmapScopedInfoAccess(const AlphaMask& rBitmap)
: moAccess(rBitmap)
{
}
BitmapScopedInfoAccess() {}
BitmapScopedInfoAccess& operator=(const Bitmap& rBitmap)
{
moAccess.emplace(rBitmap);
return *this;
}
BitmapScopedInfoAccess& operator=(const AlphaMask& rBitmap)
{
moAccess.emplace(rBitmap);
return *this;
}
bool operator!() const { return !moAccess.has_value() || !*moAccess; }
explicit operator bool() const { return moAccess && bool(*moAccess); }
void reset() { moAccess.reset(); }
BitmapInfoAccess* get() { return moAccess ? &*moAccess : nullptr; }
const BitmapInfoAccess* get() const { return moAccess ? &*moAccess : nullptr; }
BitmapInfoAccess* operator->() { return &*moAccess; }
const BitmapInfoAccess* operator->() const { return &*moAccess; }
BitmapInfoAccess& operator*() { return *moAccess; }
const BitmapInfoAccess& operator*() const { return *moAccess; }
private:
std::optional<BitmapInfoAccess> moAccess;
};
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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