diff options
Diffstat (limited to '')
| -rw-r--r-- | vcl/headless/svpbmp.cxx | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/vcl/headless/svpbmp.cxx b/vcl/headless/svpbmp.cxx new file mode 100644 index 000000000..4d881f025 --- /dev/null +++ b/vcl/headless/svpbmp.cxx @@ -0,0 +1,283 @@ +/* -*- 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() +: SalBitmap(), + basegfx::SystemDependentDataHolder(), // MM02 + mpDIB() +{ +} + +SvpSalBitmap::~SvpSalBitmap() +{ + Destroy(); +} + +static std::unique_ptr<BitmapBuffer> ImplCreateDIB( + const Size& rSize, + sal_uInt16 nBitCount, + const BitmapPalette& rPal) +{ + assert( + (nBitCount == 0 + || nBitCount == 1 + || nBitCount == 4 + || nBitCount == 8 + || nBitCount == 24 + || nBitCount == 32) + && "Unsupported BitCount!"); + + if (!rSize.Width() || !rSize.Height()) + return nullptr; + + std::unique_ptr<BitmapBuffer> pDIB; + + try + { + pDIB.reset(new BitmapBuffer); + } + catch (const std::bad_alloc&) + { + return nullptr; + } + + const sal_uInt16 nColors = ( nBitCount <= 8 ) ? ( 1 << nBitCount ) : 0; + + switch (nBitCount) + { + case 1: + pDIB->mnFormat = ScanlineFormat::N1BitLsbPal; + break; + case 4: + pDIB->mnFormat = ScanlineFormat::N4BitMsnPal; + break; + case 8: + pDIB->mnFormat = ScanlineFormat::N8BitPal; + break; + case 24: + pDIB->mnFormat = SVP_24BIT_FORMAT; + break; + default: + nBitCount = 32; + [[fallthrough]]; + case 32: + pDIB->mnFormat = SVP_CAIRO_FORMAT; + break; + } + + pDIB->mnFormat |= ScanlineFormat::TopDown; + pDIB->mnWidth = rSize.Width(); + pDIB->mnHeight = rSize.Height(); + long nScanlineBase; + bool bFail = o3tl::checked_multiply<long>(pDIB->mnWidth, nBitCount, nScanlineBase); + if (bFail) + { + SAL_WARN("vcl.gdi", "checked multiply failed"); + return nullptr; + } + pDIB->mnScanlineSize = AlignedWidth4Bytes(nScanlineBase); + if (pDIB->mnScanlineSize < nScanlineBase/8) + { + SAL_WARN("vcl.gdi", "scanline calculation wraparound"); + return nullptr; + } + pDIB->mnBitCount = nBitCount; + + 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 nullptr; + } + + 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 + { + std::memset(pDIB->mpBits, 0, size); + } + } + catch (const std::bad_alloc&) + { + pDIB.reset(); + } + + return pDIB; +} + +void SvpSalBitmap::Create(std::unique_ptr<BitmapBuffer> pBuf) +{ + Destroy(); + mpDIB = std::move(pBuf); +} + +bool SvpSalBitmap::Create(const Size& rSize, sal_uInt16 nBitCount, const BitmapPalette& rPal) +{ + Destroy(); + mpDIB = ImplCreateDIB( rSize, nBitCount, rPal ); + return mpDIB != nullptr; +} + +bool SvpSalBitmap::Create(const SalBitmap& rBmp) +{ + Destroy(); + + const SvpSalBitmap& rSalBmp = static_cast<const SvpSalBitmap&>(rBmp); + + if (rSalBmp.mpDIB) + { + // TODO: reference counting... + mpDIB.reset(new BitmapBuffer( *rSalBmp.mpDIB )); + + const size_t size = mpDIB->mnScanlineSize * mpDIB->mnHeight; + if (size > SAL_MAX_INT32/2) + { + mpDIB.reset(); + return false; + } + + // TODO: get rid of this when BitmapBuffer gets copy constructor + try + { + mpDIB->mpBits = new sal_uInt8[size]; + std::memcpy(mpDIB->mpBits, rSalBmp.mpDIB->mpBits, size); + } + catch (const std::bad_alloc&) + { + mpDIB.reset(); + } + } + + return !rSalBmp.mpDIB || (mpDIB != nullptr); +} + +bool SvpSalBitmap::Create( const SalBitmap& /*rSalBmp*/, + SalGraphics* /*pGraphics*/ ) +{ + return false; +} + +bool SvpSalBitmap::Create( const SalBitmap& /*rSalBmp*/, + sal_uInt16 /*nNewBitCount*/ ) +{ + return false; +} + +bool SvpSalBitmap::Create( const css::uno::Reference< css::rendering::XBitmapCanvas >& /*xBitmapCanvas*/, Size& /*rSize*/, bool /*bMask*/ ) +{ + return false; +} + +void SvpSalBitmap::Destroy() +{ + if (mpDIB) + { + delete[] mpDIB->mpBits; + mpDIB.reset(); + } +} + +Size SvpSalBitmap::GetSize() const +{ + Size aSize; + + if (mpDIB) + { + aSize.setWidth( mpDIB->mnWidth ); + aSize.setHeight( mpDIB->mnHeight ); + } + + return aSize; +} + +sal_uInt16 SvpSalBitmap::GetBitCount() const +{ + sal_uInt16 nBitCount; + + if (mpDIB) + nBitCount = mpDIB->mnBitCount; + else + nBitCount = 0; + + return nBitCount; +} + +BitmapBuffer* SvpSalBitmap::AcquireBuffer(BitmapAccessMode) +{ + return mpDIB.get(); +} + +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; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |