office-gobmx/vcl/headless/svpbmp.cxx
Noel Grandin c4228a798e pass BitmapBuffer around by std::optional
instead of allocating on the heap, it is small

Change-Id: I79eec6605a04c09d9a984cd1a719affb5b06dff3
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/160195
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
2023-12-02 09:07:15 +01:00

272 lines
6.7 KiB
C++

/* -*- 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 .
*/
#include <sal/config.h>
#include <sal/log.hxx>
#include <cstring>
#include <headless/svpbmp.hxx>
#include <headless/svpgdi.hxx>
#include <headless/svpinst.hxx>
#include <basegfx/vector/b2ivector.hxx>
#include <basegfx/range/b2ibox.hxx>
#include <o3tl/safeint.hxx>
#include <tools/helpers.hxx>
#include <vcl/bitmap.hxx>
using namespace basegfx;
SvpSalBitmap::SvpSalBitmap()
{
}
SvpSalBitmap::~SvpSalBitmap()
{
Destroy();
}
static std::optional<BitmapBuffer> ImplCreateDIB(
const Size& rSize,
vcl::PixelFormat ePixelFormat,
const BitmapPalette& rPal,
bool bClear)
{
if (!rSize.Width() || !rSize.Height())
return std::nullopt;
std::optional<BitmapBuffer> pDIB(std::in_place);
switch (ePixelFormat)
{
case vcl::PixelFormat::N8_BPP:
pDIB->mnFormat = ScanlineFormat::N8BitPal;
break;
case vcl::PixelFormat::N24_BPP:
pDIB->mnFormat = SVP_24BIT_FORMAT;
break;
case vcl::PixelFormat::N32_BPP:
pDIB->mnFormat = SVP_CAIRO_FORMAT;
break;
case vcl::PixelFormat::INVALID:
assert(false);
pDIB->mnFormat = SVP_CAIRO_FORMAT;
break;
}
sal_uInt16 nColors = 0;
if (ePixelFormat <= vcl::PixelFormat::N8_BPP)
nColors = vcl::numberOfColors(ePixelFormat);
pDIB->mnFormat |= ScanlineFormat::TopDown;
pDIB->mnWidth = rSize.Width();
pDIB->mnHeight = rSize.Height();
tools::Long nScanlineBase;
bool bFail = o3tl::checked_multiply<tools::Long>(pDIB->mnWidth, vcl::pixelFormatBitCount(ePixelFormat), nScanlineBase);
if (bFail)
{
SAL_WARN("vcl.gdi", "checked multiply failed");
return std::nullopt;
}
pDIB->mnScanlineSize = AlignedWidth4Bytes(nScanlineBase);
if (pDIB->mnScanlineSize < nScanlineBase/8)
{
SAL_WARN("vcl.gdi", "scanline calculation wraparound");
return std::nullopt;
}
pDIB->mnBitCount = vcl::pixelFormatBitCount(ePixelFormat);
if (nColors)
{
pDIB->maPalette = rPal;
pDIB->maPalette.SetEntryCount( nColors );
}
size_t size;
bFail = o3tl::checked_multiply<size_t>(pDIB->mnHeight, pDIB->mnScanlineSize, size);
SAL_WARN_IF(bFail, "vcl.gdi", "checked multiply failed");
if (bFail || size > SAL_MAX_INT32/2)
{
return std::nullopt;
}
try
{
pDIB->mpBits = new sal_uInt8[size];
#ifdef __SANITIZE_ADDRESS__
if (!pDIB->mpBits)
{ // can only happen with ASAN allocator_may_return_null=1
pDIB.reset();
}
else
#endif
if (bClear)
{
std::memset(pDIB->mpBits, 0, size);
}
}
catch (const std::bad_alloc&)
{
pDIB.reset();
}
return pDIB;
}
void SvpSalBitmap::Create(const std::optional<BitmapBuffer>& pBuf)
{
Destroy();
moDIB = pBuf;
}
bool SvpSalBitmap::ImplCreate(const Size& rSize, vcl::PixelFormat ePixelFormat,
const BitmapPalette& rPal, bool bClear)
{
Destroy();
moDIB = ImplCreateDIB(rSize, ePixelFormat, rPal, bClear);
return moDIB.has_value();
}
bool SvpSalBitmap::Create(const Size& rSize, vcl::PixelFormat ePixelFormat, const BitmapPalette& rPal)
{
return ImplCreate(rSize, ePixelFormat, rPal, true);
}
bool SvpSalBitmap::Create(const SalBitmap& rBmp)
{
Destroy();
const SvpSalBitmap& rSalBmp = static_cast<const SvpSalBitmap&>(rBmp);
if (rSalBmp.moDIB)
{
// TODO: reference counting...
moDIB.emplace( *rSalBmp.moDIB );
const size_t size = moDIB->mnScanlineSize * moDIB->mnHeight;
if (size > SAL_MAX_INT32/2)
{
moDIB.reset();
return false;
}
// TODO: get rid of this when BitmapBuffer gets copy constructor
try
{
moDIB->mpBits = new sal_uInt8[size];
std::memcpy(moDIB->mpBits, rSalBmp.moDIB->mpBits, size);
}
catch (const std::bad_alloc&)
{
moDIB.reset();
}
}
return !rSalBmp.moDIB.has_value() || moDIB.has_value();
}
bool SvpSalBitmap::Create( const SalBitmap& /*rSalBmp*/,
SalGraphics* /*pGraphics*/ )
{
return false;
}
bool SvpSalBitmap::Create(const SalBitmap& /*rSalBmp*/,
vcl::PixelFormat /*eNewPixelFormat*/)
{
return false;
}
bool SvpSalBitmap::Create( const css::uno::Reference< css::rendering::XBitmapCanvas >& /*xBitmapCanvas*/, Size& /*rSize*/, bool /*bMask*/ )
{
return false;
}
void SvpSalBitmap::Destroy()
{
if (moDIB.has_value())
{
delete[] moDIB->mpBits;
moDIB.reset();
}
}
Size SvpSalBitmap::GetSize() const
{
Size aSize;
if (moDIB.has_value())
{
aSize.setWidth( moDIB->mnWidth );
aSize.setHeight( moDIB->mnHeight );
}
return aSize;
}
sal_uInt16 SvpSalBitmap::GetBitCount() const
{
sal_uInt16 nBitCount;
if (moDIB.has_value())
nBitCount = moDIB->mnBitCount;
else
nBitCount = 0;
return nBitCount;
}
BitmapBuffer* SvpSalBitmap::AcquireBuffer(BitmapAccessMode)
{
return moDIB ? &*moDIB : nullptr;
}
void SvpSalBitmap::ReleaseBuffer(BitmapBuffer*, BitmapAccessMode nMode)
{
if( nMode == BitmapAccessMode::Write )
InvalidateChecksum();
}
bool SvpSalBitmap::GetSystemData( BitmapSystemData& )
{
return false;
}
bool SvpSalBitmap::ScalingSupported() const
{
return false;
}
bool SvpSalBitmap::Scale( const double& /*rScaleX*/, const double& /*rScaleY*/, BmpScaleFlag /*nScaleFlag*/ )
{
return false;
}
bool SvpSalBitmap::Replace( const ::Color& /*rSearchColor*/, const ::Color& /*rReplaceColor*/, sal_uInt8 /*nTol*/ )
{
return false;
}
const basegfx::SystemDependentDataHolder* SvpSalBitmap::accessSystemDependentDataHolder() const
{
return this;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */