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/**************************************************************
*
* 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.
*
*************************************************************/
#ifndef _CPPCANVAS_TRANSPARENCYGROUPACTION_HXX
#define _CPPCANVAS_TRANSPARENCYGROUPACTION_HXX
#include <cppcanvas/canvas.hxx>
#include <cppcanvas/renderer.hxx>
#include <action.hxx>
#include <memory> // auto_ptr
namespace basegfx {
class B2DPoint;
class B2DVector;
}
class GDIMetaFile;
class Gradient;
/* Definition of internal::TransparencyGroupActionFactory class */
namespace cppcanvas
{
namespace internal
{
struct OutDevState;
typedef ::std::auto_ptr< GDIMetaFile > MtfAutoPtr;
typedef ::std::auto_ptr< Gradient > GradientAutoPtr;
/** Transparency group action.
This action groups a bunch of other actions, to be
rendered with the given transparency setting against the
background.
Creates encapsulated converters between GDIMetaFile and
XCanvas. The Canvas argument is deliberately placed at the
constructor, to force reconstruction of this object for a
new canvas. This considerably eases internal state
handling, since a lot of the internal state (e.g. fonts,
text layout) is Canvas-dependent.
*/
class TransparencyGroupActionFactory
{
public:
/** Create new transparency group action.
@param rGroupMtf
Metafile that groups all actions to be rendered
transparent
@param rParms
Render parameters
@param rDstPoint
Left, top edge of destination, in current state
coordinate system
@param rDstSize
Size of the transparency group object, in current
state coordinate system.
@param nAlpha
Alpha value, must be in the range [0,1]
*/
static ActionSharedPtr createTransparencyGroupAction( MtfAutoPtr& rGroupMtf,
const Renderer::Parameters& rParms,
const ::basegfx::B2DPoint& rDstPoint,
const ::basegfx::B2DVector& rDstSize,
double nAlpha,
const CanvasSharedPtr& rCanvas,
const OutDevState& rState );
/** Create new transparency group action.
@param rGroupMtf
Metafile that groups all actions to be rendered
transparent.
@param rAlphaGradient
VCL gradient, to be rendered into the action's alpha
channel.
@param rParms
Render parameters
@param rDstPoint
Left, top edge of destination, in current state
coordinate system
@param rDstSize
Size of the transparency group object, in current
state coordinate system.
*/
static ActionSharedPtr createTransparencyGroupAction( MtfAutoPtr& rGroupMtf,
GradientAutoPtr& rAlphaGradient,
const Renderer::Parameters& rParms,
const ::basegfx::B2DPoint& rDstPoint,
const ::basegfx::B2DVector& rDstSize,
const CanvasSharedPtr& rCanvas,
const OutDevState& rState );
private:
// static factory, disable big four
TransparencyGroupActionFactory();
~TransparencyGroupActionFactory();
TransparencyGroupActionFactory(const TransparencyGroupActionFactory&);
TransparencyGroupActionFactory& operator=( const TransparencyGroupActionFactory& );
};
}
}
#endif /*_CPPCANVAS_TRANSPARENCYGROUPACTION_HXX */
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