a2623abe07
Change-Id: I498c10e8bc134b41e3606d8a05cf3103a9274735 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/166937 Tested-by: Jenkins Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>
257 lines
9.9 KiB
C++
257 lines
9.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <sal/config.h>
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#include <memory>
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#include <cppuhelper/supportsservice.hxx>
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#include <comphelper/diagnose_ex.hxx>
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#include <vcl/bitmapex.hxx>
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#include <canvas/canvastools.hxx>
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#include "dx_canvasbitmap.hxx"
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#include "dx_impltools.hxx"
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using namespace ::com::sun::star;
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namespace dxcanvas
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{
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CanvasBitmap::CanvasBitmap( const IBitmapSharedPtr& rBitmap,
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const DeviceRef& rDevice ) :
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mpDevice( rDevice ),
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mpBitmap( rBitmap )
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{
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ENSURE_OR_THROW( mpDevice.is() && mpBitmap,
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"CanvasBitmap::CanvasBitmap(): Invalid surface or device" );
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maCanvasHelper.setDevice( *mpDevice );
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maCanvasHelper.setTarget( mpBitmap );
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}
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void CanvasBitmap::disposeThis()
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{
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mpBitmap.reset();
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mpDevice.clear();
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// forward to parent
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CanvasBitmap_Base::disposeThis();
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}
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namespace {
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struct AlphaDIB
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{
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BITMAPINFOHEADER bmiHeader;
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RGBQUAD bmiColors[256];
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AlphaDIB()
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: bmiHeader({0,0,0,1,8,BI_RGB,0,0,0,0,0})
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{
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for (size_t i = 0; i < 256; ++i)
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{
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// this here fills palette with grey level colors, starting
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// from 0,0,0 up to 255,255,255
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BYTE const b(i);
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bmiColors[i] = { b,b,b,b };
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}
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}
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};
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}
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uno::Any SAL_CALL CanvasBitmap::getFastPropertyValue( sal_Int32 nHandle )
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{
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uno::Any aRes;
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// 0 ... get BitmapEx
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// 1 ... get Pixbuf with bitmap RGB content
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// 2 ... get Pixbuf with bitmap alpha mask
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switch( nHandle )
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{
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// sorry, no BitmapEx here...
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case 0:
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aRes <<= reinterpret_cast<sal_Int64>( nullptr );
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break;
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case 1:
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{
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if(!mpBitmap->hasAlpha())
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{
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HBITMAP aHBmp;
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mpBitmap->getBitmap()->GetHBITMAP(Gdiplus::Color(), &aHBmp );
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uno::Sequence< uno::Any > args{ uno::Any(reinterpret_cast<sal_Int64>(aHBmp)) };
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aRes <<= args;
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}
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else
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{
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// need to copy&convert the bitmap, since dx
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// canvas uses inline alpha channel
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HDC hScreenDC=GetDC(nullptr);
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const basegfx::B2ISize aSize = mpBitmap->getSize();
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HBITMAP hBmpBitmap = CreateCompatibleBitmap( hScreenDC,
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aSize.getWidth(),
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aSize.getHeight() );
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if( !hBmpBitmap )
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return aRes;
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BITMAPINFOHEADER aBIH;
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aBIH.biSize = sizeof( BITMAPINFOHEADER );
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aBIH.biWidth = aSize.getWidth();
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aBIH.biHeight = -aSize.getHeight();
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aBIH.biPlanes = 1;
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aBIH.biBitCount = 32;
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aBIH.biCompression = BI_RGB; // expects pixel in
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// bbggrrxx format
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// (little endian)
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aBIH.biSizeImage = 0;
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aBIH.biXPelsPerMeter = 0;
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aBIH.biYPelsPerMeter = 0;
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aBIH.biClrUsed = 0;
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aBIH.biClrImportant = 0;
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Gdiplus::BitmapData aBmpData;
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aBmpData.Width = aSize.getWidth();
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aBmpData.Height = aSize.getHeight();
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aBmpData.Stride = 4*aBmpData.Width;
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aBmpData.PixelFormat = PixelFormat32bppARGB;
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aBmpData.Scan0 = nullptr;
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const Gdiplus::Rect aRect( 0,0,aSize.getWidth(),aSize.getHeight() );
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BitmapSharedPtr pGDIPlusBitmap=mpBitmap->getBitmap();
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if( Gdiplus::Ok != pGDIPlusBitmap->LockBits( &aRect,
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Gdiplus::ImageLockModeRead,
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PixelFormat32bppARGB, // outputs ARGB (big endian)
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&aBmpData ) )
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{
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// failed to lock, bail out
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return aRes;
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}
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// now aBmpData.Scan0 contains our bits - push
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// them into HBITMAP, ignoring alpha
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SetDIBits( hScreenDC, hBmpBitmap, 0, aSize.getHeight(), aBmpData.Scan0, reinterpret_cast<PBITMAPINFO>(&aBIH), DIB_RGB_COLORS );
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pGDIPlusBitmap->UnlockBits( &aBmpData );
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uno::Sequence< uno::Any > args{ uno::Any(reinterpret_cast<sal_Int64>(hBmpBitmap)) };
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aRes <<= args;
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}
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}
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break;
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case 2:
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{
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if(!mpBitmap->hasAlpha())
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{
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return aRes;
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}
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else
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{
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static AlphaDIB aDIB;
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// need to copy&convert the bitmap, since dx
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// canvas uses inline alpha channel
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HDC hScreenDC=GetDC(nullptr);
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const basegfx::B2ISize aSize = mpBitmap->getSize();
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HBITMAP hBmpBitmap = CreateCompatibleBitmap( hScreenDC, aSize.getWidth(), aSize.getHeight() );
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if( !hBmpBitmap )
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return aRes;
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aDIB.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
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aDIB.bmiHeader.biWidth = aSize.getWidth();
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aDIB.bmiHeader.biHeight = -aSize.getHeight();
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aDIB.bmiHeader.biPlanes = 1;
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aDIB.bmiHeader.biBitCount = 8;
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aDIB.bmiHeader.biCompression = BI_RGB;
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aDIB.bmiHeader.biSizeImage = 0;
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aDIB.bmiHeader.biXPelsPerMeter = 0;
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aDIB.bmiHeader.biYPelsPerMeter = 0;
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aDIB.bmiHeader.biClrUsed = 0;
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aDIB.bmiHeader.biClrImportant = 0;
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Gdiplus::BitmapData aBmpData;
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aBmpData.Width = aSize.getWidth();
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aBmpData.Height = aSize.getHeight();
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aBmpData.Stride = 4*aBmpData.Width;
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aBmpData.PixelFormat = PixelFormat32bppARGB;
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aBmpData.Scan0 = nullptr;
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const Gdiplus::Rect aRect( 0,0,aSize.getWidth(),aSize.getHeight() );
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BitmapSharedPtr pGDIPlusBitmap=mpBitmap->getBitmap();
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if( Gdiplus::Ok != pGDIPlusBitmap->LockBits( &aRect,
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Gdiplus::ImageLockModeRead,
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PixelFormat32bppARGB, // outputs ARGB (big endian)
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&aBmpData ) )
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{
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// failed to lock, bail out
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return aRes;
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}
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// copy only alpha channel to pAlphaBits
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const sal_Int32 nScanWidth((aSize.getWidth() + 3) & ~3);
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std::unique_ptr<sal_uInt8[]> pAlphaBits( new sal_uInt8[nScanWidth*aSize.getHeight()] );
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const sal_uInt8* pInBits=static_cast<sal_uInt8*>(aBmpData.Scan0);
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assert(pInBits);
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pInBits+=3;
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for( sal_Int32 y=0; y<aSize.getHeight(); ++y )
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{
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sal_uInt8* pOutBits=pAlphaBits.get()+y*nScanWidth;
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for( sal_Int32 x=0; x<aSize.getWidth(); ++x )
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{
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*pOutBits++ = *pInBits;
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pInBits += 4;
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}
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}
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pGDIPlusBitmap->UnlockBits( &aBmpData );
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// set bits to newly create HBITMAP
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SetDIBits( hScreenDC, hBmpBitmap, 0,
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aSize.getHeight(), pAlphaBits.get(),
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reinterpret_cast<PBITMAPINFO>(&aDIB), DIB_RGB_COLORS );
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uno::Sequence< uno::Any > args{ uno::Any(reinterpret_cast<sal_Int64>(hBmpBitmap)) };
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aRes <<= args;
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}
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}
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break;
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}
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return aRes;
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}
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OUString SAL_CALL CanvasBitmap::getImplementationName( )
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{
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return "DXCanvas.CanvasBitmap";
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}
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sal_Bool SAL_CALL CanvasBitmap::supportsService( const OUString& ServiceName )
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{
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return cppu::supportsService( this, ServiceName );
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}
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uno::Sequence< OUString > SAL_CALL CanvasBitmap::getSupportedServiceNames( )
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{
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return { "com.sun.star.rendering.CanvasBitmap" };
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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