/* -*- 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 .
*/
#pragma once
#include "canvashelper.hxx"
#include <vcl/bitmapex.hxx>
#include "bitmapbackbuffer.hxx"
namespace vclcanvas
{
/** Helper class for basic canvasbitmap functionality. Extends
CanvasHelper with some CanvasBitmap specialities , such as alpha
support .
Note that a plain CanvasHelper , although it does support the
XBitmap interface , has no provision for alpha channel on VCL
( at least no efficient one . If the alpha VDev one day gets
part of SAL , we might change that ) .
*/
class CanvasBitmapHelper : public CanvasHelper
{
public :
CanvasBitmapHelper();
/** Set a new bitmap on this helper.
This method late - initializes the bitmap canvas helper ,
providing it with the necessary device and output
objects . The internally stored bitmap representation is
updated from the given bitmap , including any size
changes . Note that the CanvasHelper does < em > not < / em > take
ownership of the SpriteCanvas object , nor does it perform
any reference counting . Thus , to prevent reference counted
objects from deletion , the user of this class is
responsible for holding ref - counted references to those
objects !
@ param rBitmap
Content of this bitmap is used as our new content ( our
internal size is adapted to the size of the bitmap given )
@ param rDevice
Reference device for this canvas bitmap
@ param rOutDevProvider
Reference output device . Used to create matching bitmap .
*/
void init( const BitmapEx& rBitmap,
css::rendering::XGraphicDevice& rDevice,
const OutDevProviderSharedPtr& rOutDevProvider );
// Overridden CanvasHelper functionality
// =====================================
void disposing();
void clear();
css::geometry::IntegerSize2D getSize() const ;
css::uno::Reference< css::rendering::XBitmap >
getScaledBitmap( const css::geometry::RealSize2D& newSize,
bool beFast );
css::uno::Sequence< sal_Int8 >
getData( css::rendering::IntegerBitmapLayout& bitmapLayout,
const css::geometry::IntegerRectangle2D& rect );
css::uno::Sequence< sal_Int8 >
getPixel( css::rendering::IntegerBitmapLayout& bitmapLayout,
const css::geometry::IntegerPoint2D& pos );
css::rendering::IntegerBitmapLayout getMemoryLayout() const ;
/// @internal
BitmapEx getBitmap() const ;
private :
BitmapBackBufferSharedPtr mpBackBuffer;
OutDevProviderSharedPtr mpOutDevReference;
};
}
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