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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/.
*/
#pragma once
#include <o3tl/safeint.hxx>
#include <vcl/BitmapColor.hxx>
#include <vcl/bitmapex.hxx>
namespace vcl::bitmap
{
/**
* 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 maSize;
sal_uInt8 mnBitCount;
public:
RawBitmap(Size const& rSize, sal_uInt8 nBitCount)
: maSize(rSize)
, mnBitCount(nBitCount)
{
assert(nBitCount == 24 || nBitCount == 32);
if (rSize.getWidth() > std::numeric_limits<sal_Int32>::max() || rSize.getWidth() < 0)
throw std::bad_alloc();
if (rSize.getHeight() > std::numeric_limits<sal_Int32>::max() || rSize.getHeight() < 0)
throw std::bad_alloc();
sal_Int32 nRowSize, nDataSize;
if (o3tl::checked_multiply<sal_Int32>(rSize.getWidth(), nBitCount / 8, nRowSize)
|| o3tl::checked_multiply<sal_Int32>(nRowSize, rSize.getHeight(), nDataSize)
|| nDataSize < 0)
{
throw std::bad_alloc();
}
mpData.reset(new sal_uInt8[nDataSize]);
}
void SetPixel(tools::Long nY, tools::Long nX, Color nColor)
{
tools::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.GetAlpha();
}
void SetAlpha(tools::Long nY, tools::Long nX, sal_uInt8 nAlpha)
{
assert(mnBitCount == 32);
tools::Long p = (nY * maSize.getWidth() + nX) * (mnBitCount / 8) + 3;
mpData[p] = nAlpha;
}
Color GetPixel(tools::Long nY, tools::Long nX) const
{
tools::Long p = (nY * maSize.getWidth() + nX) * mnBitCount / 8;
if (mnBitCount == 24)
return Color(mpData[p], mpData[p + 1], mpData[p + 2]);
else
return Color(ColorAlpha, 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(tools::Long nY, tools::Long nX, BitmapColor nColor) = delete;
tools::Long Height() const { return maSize.Height(); }
tools::Long Width() const { return maSize.Width(); }
sal_uInt8 GetBitCount() const { return mnBitCount; }
};
} // end vcl::bitmap
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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