/* -*- 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 #include #include #include #include #include #include #include using namespace basegfx; SvpSalBitmap::SvpSalBitmap() { } SvpSalBitmap::~SvpSalBitmap() { Destroy(); } static std::optional ImplCreateDIB( const Size& rSize, vcl::PixelFormat ePixelFormat, const BitmapPalette& rPal, bool bClear) { if (!rSize.Width() || !rSize.Height()) return std::nullopt; std::optional pDIB(std::in_place); switch (ePixelFormat) { case vcl::PixelFormat::N8_BPP: pDIB->meFormat = ScanlineFormat::N8BitPal; break; case vcl::PixelFormat::N24_BPP: pDIB->meFormat = SVP_24BIT_FORMAT; break; case vcl::PixelFormat::N32_BPP: pDIB->meFormat = SVP_CAIRO_FORMAT; break; case vcl::PixelFormat::INVALID: assert(false); pDIB->meFormat = SVP_CAIRO_FORMAT; break; } sal_uInt16 nColors = 0; if (ePixelFormat <= vcl::PixelFormat::N8_BPP) nColors = vcl::numberOfColors(ePixelFormat); pDIB->meDirection = ScanlineDirection::TopDown; pDIB->mnWidth = rSize.Width(); pDIB->mnHeight = rSize.Height(); tools::Long nScanlineBase; bool bFail = o3tl::checked_multiply(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(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& 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(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: */ >distro/lhm/libreoffice-7-4+backports LibreOffice 核心代码仓库文档基金会

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