| /************************************************************** |
| * |
| * 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 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| // MARKER(update_precomp.py): autogen include statement, do not remove |
| #include "precompiled_canvas.hxx" |
| |
| #include "bitmapbackbuffer.hxx" |
| |
| #include <osl/mutex.hxx> |
| #include <vos/mutex.hxx> |
| |
| #include <vcl/svapp.hxx> |
| #include <vcl/bitmapex.hxx> |
| #include <vcl/bmpacc.hxx> |
| |
| |
| namespace vclcanvas |
| { |
| BitmapBackBuffer::BitmapBackBuffer( const BitmapEx& rBitmap, |
| const OutputDevice& rRefDevice ) : |
| maBitmap( rBitmap ), |
| mpVDev( NULL ), |
| mrRefDevice( rRefDevice ), |
| mbBitmapContentIsCurrent( false ), |
| mbVDevContentIsCurrent( false ) |
| { |
| } |
| |
| BitmapBackBuffer::~BitmapBackBuffer() |
| { |
| // make sure solar mutex is held on deletion (other methods |
| // are supposed to be called with already locked solar mutex) |
| ::vos::OGuard aGuard( Application::GetSolarMutex() ); |
| |
| if( mpVDev ) |
| delete mpVDev; |
| } |
| |
| OutputDevice& BitmapBackBuffer::getOutDev() |
| { |
| createVDev(); |
| updateVDev(); |
| return *mpVDev; |
| } |
| |
| const OutputDevice& BitmapBackBuffer::getOutDev() const |
| { |
| createVDev(); |
| updateVDev(); |
| return *mpVDev; |
| } |
| |
| void BitmapBackBuffer::clear() |
| { |
| // force current content to bitmap, make all transparent white |
| getBitmapReference().Erase(COL_TRANSPARENT); |
| } |
| |
| BitmapEx& BitmapBackBuffer::getBitmapReference() |
| { |
| OSL_ENSURE( !mbBitmapContentIsCurrent || !mbVDevContentIsCurrent, |
| "BitmapBackBuffer::getBitmapReference(): Both bitmap and VDev are valid?!" ); |
| |
| if( mbVDevContentIsCurrent && mpVDev ) |
| { |
| // VDev content is more current than bitmap - copy contents before! |
| mpVDev->EnableMapMode( sal_False ); |
| mpVDev->SetAntialiasing( ANTIALIASING_ENABLE_B2DDRAW ); |
| const Point aEmptyPoint; |
| *maBitmap = mpVDev->GetBitmapEx( aEmptyPoint, |
| mpVDev->GetOutputSizePixel() ); |
| } |
| |
| // client queries bitmap, and will possibly alter content - |
| // next time, VDev needs to be updated |
| mbBitmapContentIsCurrent = true; |
| mbVDevContentIsCurrent = false; |
| |
| return *maBitmap; |
| } |
| |
| Size BitmapBackBuffer::getBitmapSizePixel() const |
| { |
| Size aSize = maBitmap->GetSizePixel(); |
| |
| if( mbVDevContentIsCurrent && mpVDev ) |
| { |
| mpVDev->EnableMapMode( sal_False ); |
| mpVDev->SetAntialiasing( ANTIALIASING_ENABLE_B2DDRAW ); |
| aSize = mpVDev->GetOutputSizePixel(); |
| } |
| |
| return aSize; |
| } |
| |
| void BitmapBackBuffer::createVDev() const |
| { |
| if( !mpVDev ) |
| { |
| // VDev not yet created, do it now. Create an alpha-VDev, |
| // if bitmap has transparency. |
| mpVDev = maBitmap->IsTransparent() ? |
| new VirtualDevice( mrRefDevice, 0, 0 ) : |
| new VirtualDevice( mrRefDevice ); |
| |
| OSL_ENSURE( mpVDev, |
| "BitmapBackBuffer::createVDev(): Unable to create VirtualDevice" ); |
| |
| mpVDev->SetOutputSizePixel( maBitmap->GetSizePixel() ); |
| |
| // #i95645# |
| #if defined( QUARTZ ) |
| // use AA on VCLCanvas for Mac |
| mpVDev->SetAntialiasing( ANTIALIASING_ENABLE_B2DDRAW | mpVDev->GetAntialiasing() ); |
| #else |
| // switch off AA for WIN32 and UNIX, the VCLCanvas does not look good with it and |
| // is not required to do AA. It would need to be adapted to use it correctly |
| // (especially gradient painting). This will need extra work. |
| mpVDev->SetAntialiasing(mpVDev->GetAntialiasing() & ~ANTIALIASING_ENABLE_B2DDRAW); |
| #endif |
| } |
| } |
| |
| void BitmapBackBuffer::updateVDev() const |
| { |
| OSL_ENSURE( !mbBitmapContentIsCurrent || !mbVDevContentIsCurrent, |
| "BitmapBackBuffer::updateVDev(): Both bitmap and VDev are valid?!" ); |
| |
| if( mpVDev && mbBitmapContentIsCurrent ) |
| { |
| // fill with bitmap content |
| mpVDev->EnableMapMode( sal_False ); |
| mpVDev->SetAntialiasing( ANTIALIASING_ENABLE_B2DDRAW ); |
| const Point aEmptyPoint; |
| mpVDev->DrawBitmapEx( aEmptyPoint, *maBitmap ); |
| } |
| |
| // canvas queried the VDev, and will possibly paint into |
| // it. Next time, bitmap must be updated |
| mbBitmapContentIsCurrent = false; |
| mbVDevContentIsCurrent = true; |
| } |
| } |
| |