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-rw-r--r--vcl/headless/BitmapHelper.cxx268
1 files changed, 268 insertions, 0 deletions
diff --git a/vcl/headless/BitmapHelper.cxx b/vcl/headless/BitmapHelper.cxx
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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/.
+ *
+ * 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: */