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Diffstat (limited to 'vcl/source/gdi/bmpacc.cxx')
| -rw-r--r-- | vcl/source/gdi/bmpacc.cxx | 464 |
1 files changed, 464 insertions, 0 deletions
diff --git a/vcl/source/gdi/bmpacc.cxx b/vcl/source/gdi/bmpacc.cxx new file mode 100644 index 000000000..6910c6e3e --- /dev/null +++ b/vcl/source/gdi/bmpacc.cxx @@ -0,0 +1,464 @@ +/* -*- 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 <vcl/bitmap.hxx> +#include <vcl/bitmapaccess.hxx> + +#include <bitmapwriteaccess.hxx> +#include <salbmp.hxx> +#include <svdata.hxx> +#include <salinst.hxx> + +#include <string.h> +#include <sal/log.hxx> +#include <tools/debug.hxx> + +BitmapInfoAccess::BitmapInfoAccess( Bitmap& rBitmap, BitmapAccessMode nMode ) : + mpBuffer ( nullptr ), + mnAccessMode ( nMode ) +{ + std::shared_ptr<SalBitmap> xImpBmp = rBitmap.ImplGetSalBitmap(); + + assert( xImpBmp && "Forbidden Access to empty bitmap!" ); + + if( !xImpBmp ) + return; + + if (mnAccessMode == BitmapAccessMode::Write) + { + xImpBmp->DropScaledCache(); + + if (xImpBmp.use_count() > 2) + { + xImpBmp.reset(); + rBitmap.ImplMakeUnique(); + xImpBmp = rBitmap.ImplGetSalBitmap(); + } + } + + mpBuffer = xImpBmp->AcquireBuffer( mnAccessMode ); + + if( !mpBuffer ) + { + std::shared_ptr<SalBitmap> xNewImpBmp(ImplGetSVData()->mpDefInst->CreateSalBitmap()); + if (xNewImpBmp->Create(*xImpBmp, rBitmap.GetBitCount())) + { + xImpBmp = xNewImpBmp; + rBitmap.ImplSetSalBitmap( xImpBmp ); + mpBuffer = xImpBmp->AcquireBuffer( mnAccessMode ); + } + } + + maBitmap = rBitmap; +} + +BitmapInfoAccess::~BitmapInfoAccess() +{ + std::shared_ptr<SalBitmap> xImpBmp = maBitmap.ImplGetSalBitmap(); + + if (mpBuffer && xImpBmp) + { + xImpBmp->ReleaseBuffer( mpBuffer, mnAccessMode ); + } +} + +sal_uInt16 BitmapInfoAccess::GetBestPaletteIndex( const BitmapColor& rBitmapColor ) const +{ + return( HasPalette() ? mpBuffer->maPalette.GetBestIndex( rBitmapColor ) : 0 ); +} + +BitmapReadAccess::BitmapReadAccess( Bitmap& rBitmap, BitmapAccessMode nMode ) : + BitmapInfoAccess( rBitmap, nMode ), + mFncGetPixel ( nullptr ), + mFncSetPixel ( nullptr ) +{ + if (!mpBuffer) + return; + + const std::shared_ptr<SalBitmap>& xImpBmp = rBitmap.ImplGetSalBitmap(); + if (!xImpBmp) + return; + + maColorMask = mpBuffer->maColorMask; + + bool bOk = ImplSetAccessPointers(RemoveScanline(mpBuffer->mnFormat)); + + if (!bOk) + { + xImpBmp->ReleaseBuffer( mpBuffer, mnAccessMode ); + mpBuffer = nullptr; + } +} + +BitmapReadAccess::~BitmapReadAccess() +{ +} + +namespace +{ + bool Bitmap32IsPreMultipled() + { + auto pBackendCapabilities = ImplGetSVData()->mpDefInst->GetBackendCapabilities(); + return pBackendCapabilities->mbSupportsBitmap32; + } +} + +bool BitmapReadAccess::ImplSetAccessPointers( ScanlineFormat nFormat ) +{ + bool bRet = true; + + switch( nFormat ) + { + case ScanlineFormat::N1BitMsbPal: + { + mFncGetPixel = GetPixelForN1BitMsbPal; + mFncSetPixel = SetPixelForN1BitMsbPal; + } + break; + case ScanlineFormat::N1BitLsbPal: + { + mFncGetPixel = GetPixelForN1BitLsbPal; + mFncSetPixel = SetPixelForN1BitLsbPal; + } + break; + case ScanlineFormat::N4BitMsnPal: + { + mFncGetPixel = GetPixelForN4BitMsnPal; + mFncSetPixel = SetPixelForN4BitMsnPal; + } + break; + case ScanlineFormat::N4BitLsnPal: + { + mFncGetPixel = GetPixelForN4BitLsnPal; + mFncSetPixel = SetPixelForN4BitLsnPal; + } + break; + case ScanlineFormat::N8BitPal: + { + mFncGetPixel = GetPixelForN8BitPal; + mFncSetPixel = SetPixelForN8BitPal; + } + break; + case ScanlineFormat::N8BitTcMask: + { + mFncGetPixel = GetPixelForN8BitTcMask; + mFncSetPixel = SetPixelForN8BitTcMask; + } + break; + case ScanlineFormat::N24BitTcBgr: + { + mFncGetPixel = GetPixelForN24BitTcBgr; + mFncSetPixel = SetPixelForN24BitTcBgr; + } + break; + case ScanlineFormat::N24BitTcRgb: + { + mFncGetPixel = GetPixelForN24BitTcRgb; + mFncSetPixel = SetPixelForN24BitTcRgb; + } + break; + case ScanlineFormat::N32BitTcAbgr: + { + if (Bitmap32IsPreMultipled()) + { + mFncGetPixel = GetPixelForN32BitTcAbgr; + mFncSetPixel = SetPixelForN32BitTcAbgr; + } + else + { + mFncGetPixel = GetPixelForN32BitTcXbgr; + mFncSetPixel = SetPixelForN32BitTcXbgr; + } + } + break; + case ScanlineFormat::N32BitTcArgb: + { + if (Bitmap32IsPreMultipled()) + { + mFncGetPixel = GetPixelForN32BitTcArgb; + mFncSetPixel = SetPixelForN32BitTcArgb; + } + else + { + mFncGetPixel = GetPixelForN32BitTcXrgb; + mFncSetPixel = SetPixelForN32BitTcXrgb; + } + } + break; + case ScanlineFormat::N32BitTcBgra: + { + if (Bitmap32IsPreMultipled()) + { + mFncGetPixel = GetPixelForN32BitTcBgra; + mFncSetPixel = SetPixelForN32BitTcBgra; + } + else + { + mFncGetPixel = GetPixelForN32BitTcBgrx; + mFncSetPixel = SetPixelForN32BitTcBgrx; + } + } + break; + case ScanlineFormat::N32BitTcRgba: + { + if (Bitmap32IsPreMultipled()) + { + mFncGetPixel = GetPixelForN32BitTcRgba; + mFncSetPixel = SetPixelForN32BitTcRgba; + } + else + { + mFncGetPixel = GetPixelForN32BitTcRgbx; + mFncSetPixel = SetPixelForN32BitTcRgbx; + } + } + break; + case ScanlineFormat::N32BitTcMask: + { + mFncGetPixel = GetPixelForN32BitTcMask; + mFncSetPixel = SetPixelForN32BitTcMask; + } + break; + + default: + bRet = false; + break; + } + + return bRet; +} + +BitmapColor BitmapReadAccess::GetInterpolatedColorWithFallback( double fY, double fX, const BitmapColor& rFallback ) const +{ + // ask directly doubles >= 0.0 here to avoid rounded values of 0 at small negative + // double values, e.g. static_cast< sal_Int32 >(-0.25) is 0, not -1, but *has* to be outside (!) + if(mpBuffer && fX >= 0.0 && fY >= 0.0) + { + const sal_Int64 nX(static_cast<sal_Int64>(fX)); + const sal_Int64 nY(static_cast<sal_Int64>(fY)); + + if(nX < mpBuffer->mnWidth && nY < mpBuffer->mnHeight) + { + // get base-return value from inside pixel + BitmapColor aRetval(GetColor(nY, nX)); + + // calculate deltas and indices for neighbour accesses + sal_Int16 nDeltaX((fX - (nX + 0.5)) * 255.0); // [-255 .. 255] + sal_Int16 nDeltaY((fY - (nY + 0.5)) * 255.0); // [-255 .. 255] + sal_Int16 nIndX(0); + sal_Int16 nIndY(0); + + if(nDeltaX > 0) + { + nIndX = nX + 1; + } + else + { + nIndX = nX - 1; + nDeltaX = -nDeltaX; + } + + if(nDeltaY > 0) + { + nIndY = nY + 1; + } + else + { + nIndY = nY - 1; + nDeltaY = -nDeltaY; + } + + // get right/left neighbour + BitmapColor aXCol(rFallback); + + if(nDeltaX && nIndX >= 0 && nIndX < mpBuffer->mnWidth) + { + aXCol = GetColor(nY, nIndX); + } + + // get top/bottom neighbour + BitmapColor aYCol(rFallback); + + if(nDeltaY && nIndY >= 0 && nIndY < mpBuffer->mnHeight) + { + aYCol = GetColor(nIndY, nX); + } + + // get one of four edge neighbours + BitmapColor aXYCol(rFallback); + + if(nDeltaX && nDeltaY && nIndX >=0 && nIndY >= 0 && nIndX < mpBuffer->mnWidth && nIndY < mpBuffer->mnHeight) + { + aXYCol = GetColor(nIndY, nIndX); + } + + // merge return value with right/left neighbour + if(aXCol != aRetval) + { + aRetval.Merge(aXCol, 255 - nDeltaX); + } + + // merge top/bottom neighbour with edge + if(aYCol != aXYCol) + { + aYCol.Merge(aXYCol, 255 - nDeltaX); + } + + // merge return value with already merged top/bottom neighbour + if(aRetval != aYCol) + { + aRetval.Merge(aYCol, 255 - nDeltaY); + } + + return aRetval; + } + } + + return rFallback; +} + +BitmapColor BitmapReadAccess::GetColorWithFallback( double fY, double fX, const BitmapColor& rFallback ) const +{ + // ask directly doubles >= 0.0 here to avoid rounded values of 0 at small negative + // double values, e.g. static_cast< sal_Int32 >(-0.25) is 0, not -1, but *has* to be outside (!) + if(mpBuffer && fX >= 0.0 && fY >= 0.0) + { + const sal_Int32 nX(static_cast< sal_Int32 >(fX)); + const sal_Int32 nY(static_cast< sal_Int32 >(fY)); + + if(nX < mpBuffer->mnWidth && nY < mpBuffer->mnHeight) + { + return GetColor(nY, nX); + } + } + + return rFallback; +} + +BitmapWriteAccess::BitmapWriteAccess(Bitmap& rBitmap) + : BitmapReadAccess(rBitmap, BitmapAccessMode::Write) +{ +} + +BitmapWriteAccess::~BitmapWriteAccess() +{ +} + +void BitmapWriteAccess::CopyScanline( long nY, const BitmapReadAccess& rReadAcc ) +{ + assert(nY >= 0 && nY < mpBuffer->mnHeight && "y-coordinate in destination out of range!"); + SAL_WARN_IF( nY >= rReadAcc.Height(), "vcl", "y-coordinate in source out of range!" ); + SAL_WARN_IF( ( !HasPalette() || !rReadAcc.HasPalette() ) && ( HasPalette() || rReadAcc.HasPalette() ), "vcl", "No copying possible between palette bitmap and TC bitmap!" ); + + if( ( GetScanlineFormat() == rReadAcc.GetScanlineFormat() ) && + ( GetScanlineSize() >= rReadAcc.GetScanlineSize() ) ) + { + memcpy(GetScanline(nY), rReadAcc.GetScanline(nY), rReadAcc.GetScanlineSize()); + } + else + { + // TODO: use fastbmp infrastructure + Scanline pScanline = GetScanline( nY ); + Scanline pScanlineRead = rReadAcc.GetScanline(nY); + for( long nX = 0, nWidth = std::min( mpBuffer->mnWidth, rReadAcc.Width() ); nX < nWidth; nX++ ) + SetPixelOnData( pScanline, nX, rReadAcc.GetPixelFromData( pScanlineRead, nX ) ); + } +} + +void BitmapWriteAccess::CopyScanline( long nY, ConstScanline aSrcScanline, + ScanlineFormat nSrcScanlineFormat, sal_uInt32 nSrcScanlineSize ) +{ + const ScanlineFormat nFormat = RemoveScanline( nSrcScanlineFormat ); + + assert(nY >= 0 && nY < mpBuffer->mnHeight && "y-coordinate in destination out of range!"); + DBG_ASSERT( ( HasPalette() && nFormat <= ScanlineFormat::N8BitPal ) || + ( !HasPalette() && nFormat > ScanlineFormat::N8BitPal ), + "No copying possible between palette and non palette scanlines!" ); + + const sal_uLong nCount = std::min( GetScanlineSize(), nSrcScanlineSize ); + + if( nCount ) + { + if( GetScanlineFormat() == RemoveScanline( nSrcScanlineFormat ) ) + memcpy(GetScanline(nY), aSrcScanline, nCount); + else + { + DBG_ASSERT( nFormat != ScanlineFormat::N8BitTcMask && + nFormat != ScanlineFormat::N32BitTcMask, + "No support for pixel formats with color masks yet!" ); + + // TODO: use fastbmp infrastructure + FncGetPixel pFncGetPixel; + + switch( nFormat ) + { + case ScanlineFormat::N1BitMsbPal: pFncGetPixel = GetPixelForN1BitMsbPal; break; + case ScanlineFormat::N1BitLsbPal: pFncGetPixel = GetPixelForN1BitLsbPal; break; + case ScanlineFormat::N4BitMsnPal: pFncGetPixel = GetPixelForN4BitMsnPal; break; + case ScanlineFormat::N4BitLsnPal: pFncGetPixel = GetPixelForN4BitLsnPal; break; + case ScanlineFormat::N8BitPal: pFncGetPixel = GetPixelForN8BitPal; break; + case ScanlineFormat::N8BitTcMask: pFncGetPixel = GetPixelForN8BitTcMask; break; + case ScanlineFormat::N24BitTcBgr: pFncGetPixel = GetPixelForN24BitTcBgr; break; + case ScanlineFormat::N24BitTcRgb: pFncGetPixel = GetPixelForN24BitTcRgb; break; + case ScanlineFormat::N32BitTcAbgr: + if (Bitmap32IsPreMultipled()) + pFncGetPixel = GetPixelForN32BitTcAbgr; + else + pFncGetPixel = GetPixelForN32BitTcXbgr; + break; + case ScanlineFormat::N32BitTcArgb: + if (Bitmap32IsPreMultipled()) + pFncGetPixel = GetPixelForN32BitTcArgb; + else + pFncGetPixel = GetPixelForN32BitTcXrgb; + break; + case ScanlineFormat::N32BitTcBgra: + if (Bitmap32IsPreMultipled()) + pFncGetPixel = GetPixelForN32BitTcBgra; + else + pFncGetPixel = GetPixelForN32BitTcBgrx; + break; + case ScanlineFormat::N32BitTcRgba: + if (Bitmap32IsPreMultipled()) + pFncGetPixel = GetPixelForN32BitTcRgba; + else + pFncGetPixel = GetPixelForN32BitTcRgbx; + break; + case ScanlineFormat::N32BitTcMask: + pFncGetPixel = GetPixelForN32BitTcMask; + break; + + default: + assert(false); + pFncGetPixel = nullptr; + break; + } + + if( pFncGetPixel ) + { + const ColorMask aDummyMask; + Scanline pScanline = GetScanline(nY); + for (long nX = 0, nWidth = mpBuffer->mnWidth; nX < nWidth; ++nX) + SetPixelOnData(pScanline, nX, pFncGetPixel(aSrcScanline, nX, aDummyMask)); + } + } + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |