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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: animatedsprite.cxx,v $
* $Revision: 1.14 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_slideshow.hxx"
// must be first
#include <canvas/debug.hxx>
#include <tools/diagnose_ex.h>
#include <animatedsprite.hxx>
#include <cppcanvas/canvas.hxx>
#include <canvas/canvastools.hxx>
#include <basegfx/vector/b2dvector.hxx>
#include <basegfx/point/b2dpoint.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/numeric/ftools.hxx>
using namespace ::com::sun::star;
namespace slideshow
{
namespace internal
{
AnimatedSprite::AnimatedSprite( const ViewLayerSharedPtr& rViewLayer,
const ::basegfx::B2DSize& rSpriteSizePixel,
double nSpritePrio ) :
mpViewLayer( rViewLayer ),
mpSprite(),
maEffectiveSpriteSizePixel( rSpriteSizePixel ),
maContentPixelOffset(),
mnSpritePrio(nSpritePrio),
mnAlpha(0.0),
maPosPixel(),
maClip(),
maTransform(),
mbSpriteVisible( false )
{
ENSURE_OR_THROW( mpViewLayer, "AnimatedSprite::AnimatedSprite(): Invalid view layer" );
// Add half a pixel tolerance to sprite size, since we later on compare
// against it in resize(). And view transformations will almost never yield
// the same data bits when transforming to device coordinates
maEffectiveSpriteSizePixel += ::basegfx::B2DSize(0.5, 0.5);
mpSprite = mpViewLayer->createSprite( maEffectiveSpriteSizePixel,
mnSpritePrio );
ENSURE_OR_THROW( mpSprite, "AnimatedSprite::AnimatedSprite(): Could not create sprite" );
}
::cppcanvas::CanvasSharedPtr AnimatedSprite::getContentCanvas() const
{
ENSURE_OR_THROW( mpViewLayer->getCanvas(), "AnimatedSprite::getContentCanvas(): No view layer canvas" );
const ::cppcanvas::CanvasSharedPtr pContentCanvas( mpSprite->getContentCanvas() );
pContentCanvas->clear();
// extract linear part of canvas view transformation
// (linear means: without translational components). The
// only translation that is imposed at the view transform
// is the local content pixel offset.
//
// We can apply that directly here, no need to call
// aLinearTransform.translate(), since, as said above, the
// last column of aLinearTransform is assumed [0 0 1]
::basegfx::B2DHomMatrix aLinearTransform( mpViewLayer->getTransformation() );
aLinearTransform.set( 0, 2, maContentPixelOffset.getX() );
aLinearTransform.set( 1, 2, maContentPixelOffset.getY() );
// apply linear part of canvas view transformation to sprite canvas
pContentCanvas->setTransformation( aLinearTransform );
return pContentCanvas;
}
bool AnimatedSprite::resize( const ::basegfx::B2DSize& rSpriteSizePixel )
{
// Enlarge or reduce the sprite size, if necessary. This
// method employs a strategy similar to container, when
// allocating memory: size is doubled or halved everytime
// the limit is reached. This makes for amortized constant
// time in runtime complexity. Note that we take exact
// powers of two here, since several HW-accelerated canvas
// implementations are limited to such sprite sizes
// (otherwise, those implementations would internally
// round up, too, wasting precious mem).
::basegfx::B2DSize aNewSize( maEffectiveSpriteSizePixel );
bool bNeedResize( false );
if( rSpriteSizePixel.getX() > maEffectiveSpriteSizePixel.getX() ||
rSpriteSizePixel.getX() < 0.5*maEffectiveSpriteSizePixel.getX() )
{
// enlarge or shrink width
aNewSize.setX( ::canvas::tools::nextPow2( ::basegfx::fround(rSpriteSizePixel.getX()) ) );
bNeedResize = true;
}
if( rSpriteSizePixel.getY() > maEffectiveSpriteSizePixel.getY() ||
rSpriteSizePixel.getY() < 0.5*maEffectiveSpriteSizePixel.getY() )
{
// enlarge or shrink height, by doubling it
aNewSize.setY( ::canvas::tools::nextPow2( ::basegfx::fround(rSpriteSizePixel.getY()) ) );
bNeedResize = true;
}
if( bNeedResize )
{
// as the old sprite might have already been altered
// (and therefore been placed in the update list of
// the spritecanvas for this frame), must hide it
// here, to ensure it's not visible on screen any
// longer.
mpSprite->hide();
maEffectiveSpriteSizePixel = aNewSize;
mpSprite = mpViewLayer->createSprite( maEffectiveSpriteSizePixel,
mnSpritePrio );
ENSURE_OR_THROW( mpSprite,
"AnimatedSprite::resize(): Could not create new sprite" );
// set attributes similar to previous sprite
if( mpSprite && mbSpriteVisible )
{
mpSprite->show();
mpSprite->setAlpha( mnAlpha );
if( maPosPixel )
mpSprite->movePixel( *maPosPixel );
if( maClip )
mpSprite->setClip( *maClip );
}
}
return mpSprite;
}
void AnimatedSprite::setPixelOffset( const ::basegfx::B2DSize& rPixelOffset )
{
maContentPixelOffset = rPixelOffset;
}
::basegfx::B2DSize AnimatedSprite::getPixelOffset() const
{
return maContentPixelOffset;
}
void AnimatedSprite::movePixel( const ::basegfx::B2DPoint& rNewPos )
{
maPosPixel.reset( rNewPos );
mpSprite->movePixel( rNewPos );
}
void AnimatedSprite::setAlpha( double nAlpha )
{
mnAlpha = nAlpha;
mpSprite->setAlpha( nAlpha );
}
void AnimatedSprite::clip( const ::basegfx::B2DPolyPolygon& rClip )
{
maClip.reset( rClip );
mpSprite->setClipPixel( rClip );
}
void AnimatedSprite::clip()
{
maClip.reset();
mpSprite->setClip();
}
void AnimatedSprite::transform( const ::basegfx::B2DHomMatrix& rTransform )
{
maTransform.reset( rTransform );
mpSprite->transform( rTransform );
}
void AnimatedSprite::setPriority( double nPrio )
{
mpSprite->setPriority( nPrio );
}
void AnimatedSprite::hide()
{
mpSprite->hide();
mbSpriteVisible = false;
}
void AnimatedSprite::show()
{
mbSpriteVisible = true;
mpSprite->show();
}
}
}
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