/* -*- 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 <memory>
#include <cppuhelper/supportsservice.hxx>
#include <tools/diagnose_ex.h>
#include <vcl/bitmapex.hxx>
#include <canvas/canvastools.hxx>
#include "dx_canvasbitmap.hxx"
#include "dx_impltools.hxx"
using namespace ::com::sun::star;
namespace dxcanvas
{
CanvasBitmap::CanvasBitmap( const IBitmapSharedPtr& rBitmap,
const DeviceRef& rDevice ) :
mpDevice( rDevice ),
mpBitmap( rBitmap )
{
ENSURE_OR_THROW( mpDevice.is() && mpBitmap,
"CanvasBitmap::CanvasBitmap(): Invalid surface or device" );
maCanvasHelper.setDevice( *mpDevice );
maCanvasHelper.setTarget( mpBitmap );
}
void CanvasBitmap::disposeThis()
{
mpBitmap.reset();
mpDevice.clear();
// forward to parent
CanvasBitmap_Base::disposeThis();
}
namespace {
struct AlphaDIB
{
BITMAPINFOHEADER bmiHeader;
RGBQUAD bmiColors[256];
AlphaDIB()
: bmiHeader({0,0,0,1,8,BI_RGB,0,0,0,0,0})
{
for (size_t i = 0; i < 256; ++i)
{
// this here fills palette with grey level colors, starting
// from 0,0,0 up to 255,255,255
BYTE const b(i);
bmiColors[i] = { b,b,b,b };
}
}
};
}
uno::Any SAL_CALL CanvasBitmap::getFastPropertyValue( sal_Int32 nHandle )
{
uno::Any aRes;
// 0 ... get BitmapEx
// 1 ... get Pixbuf with bitmap RGB content
// 2 ... get Pixbuf with bitmap alpha mask
switch( nHandle )
{
// sorry, no BitmapEx here...
case 0:
aRes <<= reinterpret_cast<sal_Int64>( nullptr );
break;
case 1:
{
if(!mpBitmap->hasAlpha())
{
HBITMAP aHBmp;
mpBitmap->getBitmap()->GetHBITMAP(Gdiplus::Color(), &aHBmp );
uno::Sequence< uno::Any > args(1);
args[0] <<= reinterpret_cast<sal_Int64>(aHBmp);
aRes <<= args;
}
else
{
// need to copy&convert the bitmap, since dx
// canvas uses inline alpha channel
HDC hScreenDC=GetDC(nullptr);
const basegfx::B2IVector aSize(mpBitmap->getSize());
HBITMAP hBmpBitmap = CreateCompatibleBitmap( hScreenDC,
aSize.getX(),
aSize.getY() );
if( !hBmpBitmap )
return aRes;
BITMAPINFOHEADER aBIH;
aBIH.biSize = sizeof( BITMAPINFOHEADER );
aBIH.biWidth = aSize.getX();
aBIH.biHeight = -aSize.getY();
aBIH.biPlanes = 1;
aBIH.biBitCount = 32;
aBIH.biCompression = BI_RGB; // expects pixel in
// bbggrrxx format
// (little endian)
aBIH.biSizeImage = 0;
aBIH.biXPelsPerMeter = 0;
aBIH.biYPelsPerMeter = 0;
aBIH.biClrUsed = 0;
aBIH.biClrImportant = 0;
Gdiplus::BitmapData aBmpData;
aBmpData.Width = aSize.getX();
aBmpData.Height = aSize.getY();
aBmpData.Stride = 4*aBmpData.Width;
aBmpData.PixelFormat = PixelFormat32bppARGB;
aBmpData.Scan0 = nullptr;
const Gdiplus::Rect aRect( 0,0,aSize.getX(),aSize.getY() );
BitmapSharedPtr pGDIPlusBitmap=mpBitmap->getBitmap();
if( Gdiplus::Ok != pGDIPlusBitmap->LockBits( &aRect,
Gdiplus::ImageLockModeRead,
PixelFormat32bppARGB, // outputs ARGB (big endian)
&aBmpData ) )
{
// failed to lock, bail out
return aRes;
}
// now aBmpData.Scan0 contains our bits - push
// them into HBITMAP, ignoring alpha
SetDIBits( hScreenDC, hBmpBitmap, 0, aSize.getY(), aBmpData.Scan0, reinterpret_cast<PBITMAPINFO>(&aBIH), DIB_RGB_COLORS );
pGDIPlusBitmap->UnlockBits( &aBmpData );
uno::Sequence< uno::Any > args(1);
args[0] <<= reinterpret_cast<sal_Int64>(hBmpBitmap);
aRes <<= args;
}
}
break;
case 2:
{
if(!mpBitmap->hasAlpha())
{
return aRes;
}
else
{
static AlphaDIB aDIB;
// need to copy&convert the bitmap, since dx
// canvas uses inline alpha channel
HDC hScreenDC=GetDC(nullptr);
const basegfx::B2IVector aSize(mpBitmap->getSize());
HBITMAP hBmpBitmap = CreateCompatibleBitmap( hScreenDC, aSize.getX(), aSize.getY() );
if( !hBmpBitmap )
return aRes;
aDIB.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
aDIB.bmiHeader.biWidth = aSize.getX();
aDIB.bmiHeader.biHeight = -aSize.getY();
aDIB.bmiHeader.biPlanes = 1;
aDIB.bmiHeader.biBitCount = 8;
aDIB.bmiHeader.biCompression = BI_RGB;
aDIB.bmiHeader.biSizeImage = 0;
aDIB.bmiHeader.biXPelsPerMeter = 0;
aDIB.bmiHeader.biYPelsPerMeter = 0;
aDIB.bmiHeader.biClrUsed = 0;
aDIB.bmiHeader.biClrImportant = 0;
Gdiplus::BitmapData aBmpData;
aBmpData.Width = aSize.getX();
aBmpData.Height = aSize.getY();
aBmpData.Stride = 4*aBmpData.Width;
aBmpData.PixelFormat = PixelFormat32bppARGB;
aBmpData.Scan0 = nullptr;
const Gdiplus::Rect aRect( 0,0,aSize.getX(),aSize.getY() );
BitmapSharedPtr pGDIPlusBitmap=mpBitmap->getBitmap();
if( Gdiplus::Ok != pGDIPlusBitmap->LockBits( &aRect,
Gdiplus::ImageLockModeRead,
PixelFormat32bppARGB, // outputs ARGB (big endian)
&aBmpData ) )
{
// failed to lock, bail out
return aRes;
}
// copy only alpha channel to pAlphaBits
const sal_Int32 nScanWidth((aSize.getX() + 3) & ~3);
std::unique_ptr<sal_uInt8[]> pAlphaBits( new sal_uInt8[nScanWidth*aSize.getY()] );
const sal_uInt8* pInBits=static_cast<sal_uInt8*>(aBmpData.Scan0);
pInBits+=3;
for( sal_Int32 y=0; y<aSize.getY(); ++y )
{
sal_uInt8* pOutBits=pAlphaBits.get()+y*nScanWidth;
for( sal_Int32 x=0; x<aSize.getX(); ++x )
{
*pOutBits++ = 255-*pInBits;
pInBits += 4;
}
}
pGDIPlusBitmap->UnlockBits( &aBmpData );
// set bits to newly create HBITMAP
SetDIBits( hScreenDC, hBmpBitmap, 0,
aSize.getY(), pAlphaBits.get(),
reinterpret_cast<PBITMAPINFO>(&aDIB), DIB_RGB_COLORS );
uno::Sequence< uno::Any > args(1);
args[0] <<= reinterpret_cast<sal_Int64>(hBmpBitmap);
aRes <<= args;
}
}
break;
}
return aRes;
}
OUString SAL_CALL CanvasBitmap::getImplementationName( )
{
return "DXCanvas.CanvasBitmap";
}
sal_Bool SAL_CALL CanvasBitmap::supportsService( const OUString& ServiceName )
{
return cppu::supportsService( this, ServiceName );
}
uno::Sequence< OUString > SAL_CALL CanvasBitmap::getSupportedServiceNames( )
{
return { "com.sun.star.rendering.CanvasBitmap" };
}
}
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