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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 <sal/config.h>
+
+#include <basegfx/numeric/ftools.hxx>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/rendering/XIntegerBitmap.hpp>
+#include <tools/diagnose_ex.h>
+#include <vcl/bitmap.hxx>
+#include <vcl/bitmapex.hxx>
+#include <vcl/BitmapReadAccess.hxx>
+#include <vcl/canvastools.hxx>
+
+#include "dx_impltools.hxx"
+#include "dx_vcltools.hxx"
+
+using namespace ::com::sun::star;
+
+namespace dxcanvas::tools
+{
+ namespace
+ {
+ /// Calc number of colors in given BitmapInfoHeader
+ sal_Int32 calcDIBColorCount( const BITMAPINFOHEADER& rBIH )
+ {
+ if( rBIH.biSize != sizeof( BITMAPCOREHEADER ) )
+ {
+ if( rBIH.biBitCount <= 8 )
+ {
+ if( rBIH.biClrUsed )
+ return rBIH.biClrUsed;
+ else
+ return 1 << rBIH.biBitCount;
+ }
+ }
+ else
+ {
+ BITMAPCOREHEADER const * pCoreHeader = reinterpret_cast<BITMAPCOREHEADER const *>(&rBIH);
+
+ if( pCoreHeader->bcBitCount <= 8 )
+ return 1 << pCoreHeader->bcBitCount;
+ }
+
+ return 0; // nothing known
+ }
+
+ /// Draw DI bits to given Graphics
+ bool drawDIBits( const std::shared_ptr< Gdiplus::Graphics >& rGraphics,
+ const void* hDIB )
+ {
+ bool bRet( false );
+
+ const BITMAPINFO* pBI = static_cast<BITMAPINFO*>(GlobalLock( const_cast<void *>(hDIB) ));
+
+ if( pBI )
+ {
+ const BYTE* pBits = reinterpret_cast<BYTE const *>(pBI) + pBI->bmiHeader.biSize +
+ calcDIBColorCount( pBI->bmiHeader ) * sizeof( RGBQUAD );
+
+ // forward to outsourced GDI+ rendering method
+ // (header clashes)
+ bRet = tools::drawDIBits( rGraphics, *pBI, pBits );
+
+ GlobalUnlock( const_cast<void *>(hDIB) );
+ }
+
+ return bRet;
+ }
+
+ /** Draw VCL bitmap to given Graphics
+
+ @param rBmp
+ Reference to bitmap. Might get modified, in such a way
+ that it will hold a DIB after a successful function call.
+ */
+ bool drawVCLBitmap( const std::shared_ptr< Gdiplus::Graphics >& rGraphics,
+ ::Bitmap& rBmp )
+ {
+ BitmapSystemData aBmpSysData;
+
+ if( !rBmp.GetSystemData( aBmpSysData ) ||
+ !aBmpSysData.pDIB )
+ {
+ // first of all, ensure that Bitmap contains a DIB, by
+ // acquiring a read access
+ BitmapReadAccess* pReadAcc = rBmp.AcquireReadAccess();
+
+ // TODO(P2): Acquiring a read access can actually
+ // force a read from VRAM, thus, avoiding this
+ // step somehow will increase performance
+ // here.
+ if( pReadAcc )
+ {
+ // try again: now, WinSalBitmap must have
+ // generated a DIB
+ if( rBmp.GetSystemData( aBmpSysData ) &&
+ aBmpSysData.pDIB )
+ {
+ return drawDIBits( rGraphics,
+ aBmpSysData.pDIB );
+ }
+
+ Bitmap::ReleaseAccess( pReadAcc );
+ }
+ }
+ else
+ {
+ return drawDIBits( rGraphics,
+ aBmpSysData.pDIB );
+ }
+
+ // failed to generate DIBits from vcl bitmap
+ return false;
+ }
+
+ /** Create a chunk of raw RGBA data GDI+ Bitmap from VCL BitmapEx
+ */
+ RawRGBABitmap bitmapFromVCLBitmapEx( const ::BitmapEx& rBmpEx )
+ {
+ // TODO(P2): Avoid temporary bitmap generation, maybe
+ // even ensure that created DIBs are copied back to
+ // BmpEx (currently, every AcquireReadAccess() will
+ // make the local bitmap copy unique, effectively
+ // duplicating the memory used)
+
+ ENSURE_OR_THROW( rBmpEx.IsAlpha(),
+ "::dxcanvas::tools::bitmapFromVCLBitmapEx(): "
+ "BmpEx has no alpha" );
+
+ // convert transparent bitmap to 32bit RGBA
+ // ========================================
+
+ const ::Size aBmpSize( rBmpEx.GetSizePixel() );
+
+ RawRGBABitmap aBmpData;
+ aBmpData.mnWidth = aBmpSize.Width();
+ aBmpData.mnHeight = aBmpSize.Height();
+ aBmpData.maBitmapData.resize(4*aBmpData.mnWidth*aBmpData.mnHeight);
+
+ Bitmap aBitmap( rBmpEx.GetBitmap() );
+
+ Bitmap::ScopedReadAccess pReadAccess( aBitmap );
+
+ const sal_Int32 nWidth( aBmpSize.Width() );
+ const sal_Int32 nHeight( aBmpSize.Height() );
+
+ ENSURE_OR_THROW( pReadAccess.get() != nullptr,
+ "::dxcanvas::tools::bitmapFromVCLBitmapEx(): "
+ "Unable to acquire read access to bitmap" );
+
+ Bitmap aAlpha( rBmpEx.GetAlpha().GetBitmap() );
+
+ Bitmap::ScopedReadAccess pAlphaReadAccess( aAlpha );
+
+ // By convention, the access buffer always has
+ // one of the following formats:
+
+ // ScanlineFormat::N1BitMsbPal
+ // ScanlineFormat::N8BitPal
+ // ScanlineFormat::N24BitTcBgr
+ // ScanlineFormat::N32BitTcMask
+
+ // and is always ScanlineFormat::BottomUp
+
+ // This is the way
+ // WinSalBitmap::AcquireBuffer() sets up the
+ // buffer
+
+ ENSURE_OR_THROW( pAlphaReadAccess.get() != nullptr,
+ "::dxcanvas::tools::bitmapFromVCLBitmapEx(): "
+ "Unable to acquire read access to alpha" );
+
+ ENSURE_OR_THROW( pAlphaReadAccess->GetScanlineFormat() == ScanlineFormat::N8BitPal,
+ "::dxcanvas::tools::bitmapFromVCLBitmapEx(): "
+ "Unsupported alpha scanline format" );
+
+ BitmapColor aCol;
+ sal_uInt8* pCurrOutput(aBmpData.maBitmapData.data());
+ int x, y;
+
+ for( y=0; y<nHeight; ++y )
+ {
+ switch( pReadAccess->GetScanlineFormat() )
+ {
+ case ScanlineFormat::N8BitPal:
+ {
+ Scanline pScan = pReadAccess->GetScanline( y );
+ Scanline pAScan = pAlphaReadAccess->GetScanline( y );
+
+ for( x=0; x<nWidth; ++x )
+ {
+ aCol = pReadAccess->GetPaletteColor( *pScan++ );
+
+ *pCurrOutput++ = aCol.GetBlue();
+ *pCurrOutput++ = aCol.GetGreen();
+ *pCurrOutput++ = aCol.GetRed();
+
+ // our notion of alpha is
+ // different from the rest
+ // of the world's
+ *pCurrOutput++ = 255 - static_cast<BYTE>(*pAScan++);
+ }
+ }
+ break;
+
+ case ScanlineFormat::N24BitTcBgr:
+ {
+ Scanline pScan = pReadAccess->GetScanline( y );
+ Scanline pAScan = pAlphaReadAccess->GetScanline( y );
+
+ for( x=0; x<nWidth; ++x )
+ {
+ // store as RGBA
+ *pCurrOutput++ = *pScan++;
+ *pCurrOutput++ = *pScan++;
+ *pCurrOutput++ = *pScan++;
+
+ // our notion of alpha is
+ // different from the rest
+ // of the world's
+ *pCurrOutput++ = 255 - static_cast<BYTE>(*pAScan++);
+ }
+ }
+ break;
+
+ // TODO(P2): Might be advantageous
+ // to hand-formulate the following
+ // formats, too.
+ case ScanlineFormat::N1BitMsbPal:
+ case ScanlineFormat::N32BitTcMask:
+ {
+ Scanline pAScan = pAlphaReadAccess->GetScanline( y );
+
+ // using fallback for those
+ // seldom formats
+ for( x=0; x<nWidth; ++x )
+ {
+ // yes. x and y are swapped on Get/SetPixel
+ aCol = pReadAccess->GetColor(y,x);
+
+ *pCurrOutput++ = aCol.GetBlue();
+ *pCurrOutput++ = aCol.GetGreen();
+ *pCurrOutput++ = aCol.GetRed();
+
+ // our notion of alpha is
+ // different from the rest
+ // of the world's
+ *pCurrOutput++ = 255 - static_cast<BYTE>(*pAScan++);
+ }
+ }
+ break;
+
+ case ScanlineFormat::N1BitLsbPal:
+ case ScanlineFormat::N24BitTcRgb:
+ case ScanlineFormat::N32BitTcAbgr:
+ case ScanlineFormat::N32BitTcArgb:
+ case ScanlineFormat::N32BitTcBgra:
+ case ScanlineFormat::N32BitTcRgba:
+ default:
+ ENSURE_OR_THROW( false,
+ "::dxcanvas::tools::bitmapFromVCLBitmapEx(): "
+ "Unexpected scanline format - has "
+ "WinSalBitmap::AcquireBuffer() changed?" );
+ }
+ }
+
+ return aBmpData;
+ }
+
+ bool drawVCLBitmapEx( const std::shared_ptr< Gdiplus::Graphics >& rGraphics,
+ const ::BitmapEx& rBmpEx )
+ {
+ if( !rBmpEx.IsAlpha() )
+ {
+ Bitmap aBmp( rBmpEx.GetBitmap() );
+ return drawVCLBitmap( rGraphics, aBmp );
+ }
+ else
+ {
+ return drawRGBABits( rGraphics,
+ bitmapFromVCLBitmapEx( rBmpEx ) );
+ }
+ }
+ }
+
+ bool drawVCLBitmapFromXBitmap( const std::shared_ptr< Gdiplus::Graphics >& rGraphics,
+ const uno::Reference< rendering::XBitmap >& xBitmap )
+ {
+ // TODO(F2): add support for floating point bitmap formats
+ uno::Reference< rendering::XIntegerReadOnlyBitmap > xIntBmp(
+ xBitmap, uno::UNO_QUERY );
+
+ if( !xIntBmp.is() )
+ return false;
+
+ ::BitmapEx aBmpEx = vcl::unotools::bitmapExFromXBitmap( xIntBmp );
+ if( aBmpEx.IsEmpty() )
+ return false;
+
+ return drawVCLBitmapEx( rGraphics, aBmpEx );
+ }
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-29 00:49:38 +0000