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Diffstat (limited to 'vcl/headless/BitmapHelper.cxx')
| -rw-r--r-- | vcl/headless/BitmapHelper.cxx | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/vcl/headless/BitmapHelper.cxx b/vcl/headless/BitmapHelper.cxx new file mode 100644 index 000000000..2b9c670df --- /dev/null +++ b/vcl/headless/BitmapHelper.cxx @@ -0,0 +1,268 @@ +/* -*- 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 <headless/BitmapHelper.hxx> +#include <svdata.hxx> + +BitmapHelper::BitmapHelper(const SalBitmap& rSourceBitmap, const bool bForceARGB32) +#ifdef HAVE_CAIRO_FORMAT_RGB24_888 + : m_bForceARGB32(bForceARGB32) +#endif +{ + const SvpSalBitmap& rSrcBmp = static_cast<const SvpSalBitmap&>(rSourceBitmap); +#ifdef HAVE_CAIRO_FORMAT_RGB24_888 + if ((rSrcBmp.GetBitCount() != 32 && rSrcBmp.GetBitCount() != 24) || bForceARGB32) +#else + (void)bForceARGB32; + if (rSrcBmp.GetBitCount() != 32) +#endif + { + //big stupid copy here + const BitmapBuffer* pSrc = rSrcBmp.GetBuffer(); + const SalTwoRect aTwoRect + = { 0, 0, pSrc->mnWidth, pSrc->mnHeight, 0, 0, pSrc->mnWidth, pSrc->mnHeight }; + std::unique_ptr<BitmapBuffer> pTmp + = (pSrc->mnFormat == SVP_24BIT_FORMAT + ? FastConvert24BitRgbTo32BitCairo(pSrc) + : StretchAndConvert(*pSrc, aTwoRect, SVP_CAIRO_FORMAT)); + aTmpBmp.Create(std::move(pTmp)); + + assert(aTmpBmp.GetBitCount() == 32); + implSetSurface(CairoCommon::createCairoSurface(aTmpBmp.GetBuffer())); + } + else + { + implSetSurface(CairoCommon::createCairoSurface(rSrcBmp.GetBuffer())); + } +} + +void BitmapHelper::mark_dirty() { cairo_surface_mark_dirty(implGetSurface()); } + +unsigned char* BitmapHelper::getBits(sal_Int32& rStride) +{ + cairo_surface_flush(implGetSurface()); + + unsigned char* mask_data = cairo_image_surface_get_data(implGetSurface()); + + const cairo_format_t nFormat = cairo_image_surface_get_format(implGetSurface()); +#ifdef HAVE_CAIRO_FORMAT_RGB24_888 + if (!m_bForceARGB32) + assert(nFormat == CAIRO_FORMAT_RGB24_888 && "Expected RGB24_888 image"); + else +#endif + { + assert(nFormat == CAIRO_FORMAT_ARGB32 + && "need to implement CAIRO_FORMAT_A1 after all here"); + } + + rStride + = cairo_format_stride_for_width(nFormat, cairo_image_surface_get_width(implGetSurface())); + + return mask_data; +} + +MaskHelper::MaskHelper(const SalBitmap& rAlphaBitmap) +{ + const SvpSalBitmap& rMask = static_cast<const SvpSalBitmap&>(rAlphaBitmap); + const BitmapBuffer* pMaskBuf = rMask.GetBuffer(); + + if (rAlphaBitmap.GetBitCount() == 8) + { + // the alpha values need to be inverted for Cairo + // so big stupid copy and invert here + const int nImageSize = pMaskBuf->mnHeight * pMaskBuf->mnScanlineSize; + pAlphaBits.reset(new unsigned char[nImageSize]); + memcpy(pAlphaBits.get(), pMaskBuf->mpBits, nImageSize); + + // TODO: make upper layers use standard alpha + sal_uInt32* pLDst = reinterpret_cast<sal_uInt32*>(pAlphaBits.get()); + for (int i = nImageSize / sizeof(sal_uInt32); --i >= 0; ++pLDst) + *pLDst = ~*pLDst; + assert(reinterpret_cast<unsigned char*>(pLDst) == pAlphaBits.get() + nImageSize); + + implSetSurface(cairo_image_surface_create_for_data(pAlphaBits.get(), CAIRO_FORMAT_A8, + pMaskBuf->mnWidth, pMaskBuf->mnHeight, + pMaskBuf->mnScanlineSize)); + } + else + { + // the alpha values need to be inverted for Cairo + // so big stupid copy and invert here + const int nImageSize = pMaskBuf->mnHeight * pMaskBuf->mnScanlineSize; + pAlphaBits.reset(new unsigned char[nImageSize]); + memcpy(pAlphaBits.get(), pMaskBuf->mpBits, nImageSize); + + const sal_Int32 nBlackIndex = pMaskBuf->maPalette.GetBestIndex(BitmapColor(COL_BLACK)); + if (nBlackIndex == 0) + { + // TODO: make upper layers use standard alpha + unsigned char* pDst = pAlphaBits.get(); + for (int i = nImageSize; --i >= 0; ++pDst) + *pDst = ~*pDst; + } + + implSetSurface(cairo_image_surface_create_for_data(pAlphaBits.get(), CAIRO_FORMAT_A1, + pMaskBuf->mnWidth, pMaskBuf->mnHeight, + pMaskBuf->mnScanlineSize)); + } +} + +namespace +{ +// check for env var that decides for using downscale pattern +const char* pDisableDownScale(getenv("SAL_DISABLE_CAIRO_DOWNSCALE")); +bool bDisableDownScale(nullptr != pDisableDownScale); + +sal_Int64 estimateUsageInBytesForSurfaceHelper(const SurfaceHelper* pHelper) +{ + sal_Int64 nRetval(0); + + if (nullptr != pHelper) + { + cairo_surface_t* pSurface(pHelper->getSurface()); + + if (pSurface) + { + const tools::Long nStride(cairo_image_surface_get_stride(pSurface)); + const tools::Long nHeight(cairo_image_surface_get_height(pSurface)); + + nRetval = nStride * nHeight; + + // if we do downscale, size will grow by 1/4 + 1/16 + 1/32 + ..., + // rough estimation just multiplies by 1.25, should be good enough + // for estimation of buffer survival time + if (!bDisableDownScale) + { + nRetval = (nRetval * 5) / 4; + } + } + } + + return nRetval; +} + +} // end anonymous namespace + +SystemDependentData_BitmapHelper::SystemDependentData_BitmapHelper( + basegfx::SystemDependentDataManager& rSystemDependentDataManager, + const std::shared_ptr<BitmapHelper>& rBitmapHelper) + : basegfx::SystemDependentData(rSystemDependentDataManager) + , maBitmapHelper(rBitmapHelper) +{ +} + +sal_Int64 SystemDependentData_BitmapHelper::estimateUsageInBytes() const +{ + return estimateUsageInBytesForSurfaceHelper(maBitmapHelper.get()); +} + +SystemDependentData_MaskHelper::SystemDependentData_MaskHelper( + basegfx::SystemDependentDataManager& rSystemDependentDataManager, + const std::shared_ptr<MaskHelper>& rMaskHelper) + : basegfx::SystemDependentData(rSystemDependentDataManager) + , maMaskHelper(rMaskHelper) +{ +} + +sal_Int64 SystemDependentData_MaskHelper::estimateUsageInBytes() const +{ + return estimateUsageInBytesForSurfaceHelper(maMaskHelper.get()); +} + +namespace +{ +// MM02 decide to use buffers or not +const char* pDisableMM02Goodies(getenv("SAL_DISABLE_MM02_GOODIES")); +bool bUseBuffer(nullptr == pDisableMM02Goodies); +const tools::Long nMinimalSquareSizeToBuffer(64 * 64); +} + +void tryToUseSourceBuffer(const SalBitmap& rSourceBitmap, std::shared_ptr<BitmapHelper>& rSurface) +{ + // MM02 try to access buffered BitmapHelper + std::shared_ptr<SystemDependentData_BitmapHelper> pSystemDependentData_BitmapHelper; + const bool bBufferSource(bUseBuffer + && rSourceBitmap.GetSize().Width() * rSourceBitmap.GetSize().Height() + > nMinimalSquareSizeToBuffer); + + if (bBufferSource) + { + const SvpSalBitmap& rSrcBmp(static_cast<const SvpSalBitmap&>(rSourceBitmap)); + pSystemDependentData_BitmapHelper + = rSrcBmp.getSystemDependentData<SystemDependentData_BitmapHelper>(); + + if (pSystemDependentData_BitmapHelper) + { + // reuse buffered data + rSurface = pSystemDependentData_BitmapHelper->getBitmapHelper(); + } + } + + if (rSurface) + return; + + // create data on-demand + rSurface = std::make_shared<BitmapHelper>(rSourceBitmap); + + if (bBufferSource) + { + // add to buffering mechanism to potentially reuse next time + const SvpSalBitmap& rSrcBmp(static_cast<const SvpSalBitmap&>(rSourceBitmap)); + rSrcBmp.addOrReplaceSystemDependentData<SystemDependentData_BitmapHelper>( + ImplGetSystemDependentDataManager(), rSurface); + } +} + +void tryToUseMaskBuffer(const SalBitmap& rMaskBitmap, std::shared_ptr<MaskHelper>& rMask) +{ + // MM02 try to access buffered MaskHelper + std::shared_ptr<SystemDependentData_MaskHelper> pSystemDependentData_MaskHelper; + const bool bBufferMask(bUseBuffer + && rMaskBitmap.GetSize().Width() * rMaskBitmap.GetSize().Height() + > nMinimalSquareSizeToBuffer); + + if (bBufferMask) + { + const SvpSalBitmap& rSrcBmp(static_cast<const SvpSalBitmap&>(rMaskBitmap)); + pSystemDependentData_MaskHelper + = rSrcBmp.getSystemDependentData<SystemDependentData_MaskHelper>(); + + if (pSystemDependentData_MaskHelper) + { + // reuse buffered data + rMask = pSystemDependentData_MaskHelper->getMaskHelper(); + } + } + + if (rMask) + return; + + // create data on-demand + rMask = std::make_shared<MaskHelper>(rMaskBitmap); + + if (bBufferMask) + { + // add to buffering mechanism to potentially reuse next time + const SvpSalBitmap& rSrcBmp(static_cast<const SvpSalBitmap&>(rMaskBitmap)); + rSrcBmp.addOrReplaceSystemDependentData<SystemDependentData_MaskHelper>( + ImplGetSystemDependentDataManager(), rMask); + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |