Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 322 insertions, 0 deletions

diff --git a/canvas/source/directx/dx_vcltools.cxx b/canvas/source/directx/dx_vcltools.cxx
new file mode 100644
index 000000000..1544ec916
--- /dev/null
+++ b/canvas/source/directx/dx_vcltools.cxx
@@ -0,0 +1,322 @@
+/* -*- 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: */