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/* -*- 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 <comphelper/diagnose_ex.hxx>
#include <animatedsprite.hxx>
#include <cppcanvas/canvas.hxx>
#include <cppcanvas/customsprite.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>
#include <utility>
using namespace ::com::sun::star;
namespace slideshow::internal
{
AnimatedSprite::AnimatedSprite( ViewLayerSharedPtr xViewLayer,
const ::basegfx::B2DSize& rSpriteSizePixel,
double nSpritePrio ) :
mpViewLayer(std::move( xViewLayer )),
mpSprite(),
maEffectiveSpriteSizePixel( rSpriteSizePixel ),
maContentPixelOffset(),
mnSpritePrio(nSpritePrio),
mnAlpha(0.0),
maPosPixel(),
maClip(),
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.getWidth() );
aLinearTransform.set( 1, 2, maContentPixelOffset.getHeight() );
// apply linear part of canvas view transformation to sprite canvas
pContentCanvas->setTransformation( aLinearTransform );
return pContentCanvas;
}
void 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 every time
// 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.getWidth() > maEffectiveSpriteSizePixel.getWidth() ||
rSpriteSizePixel.getWidth() < 0.5 * maEffectiveSpriteSizePixel.getWidth() )
{
// enlarge or shrink width
aNewSize.setWidth( ::canvas::tools::nextPow2( ::basegfx::fround(rSpriteSizePixel.getWidth()) ) );
bNeedResize = true;
}
if( rSpriteSizePixel.getHeight() > maEffectiveSpriteSizePixel.getHeight() ||
rSpriteSizePixel.getHeight() < 0.5*maEffectiveSpriteSizePixel.getHeight() )
{
// enlarge or shrink height, by doubling it
aNewSize.setHeight( ::canvas::tools::nextPow2( ::basegfx::fround(rSpriteSizePixel.getHeight()) ) );
bNeedResize = true;
}
if( !bNeedResize )
return;
// 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 (mbSpriteVisible)
{
mpSprite->show();
mpSprite->setAlpha( mnAlpha );
if( maPosPixel )
mpSprite->movePixel( *maPosPixel );
if( maClip )
mpSprite->setClip( *maClip );
}
}
void AnimatedSprite::setPixelOffset( const ::basegfx::B2DSize& rPixelOffset )
{
maContentPixelOffset = rPixelOffset;
}
void AnimatedSprite::movePixel( const ::basegfx::B2DPoint& rNewPos )
{
maPosPixel = rNewPos;
mpSprite->movePixel( rNewPos );
}
void AnimatedSprite::setAlpha( double nAlpha )
{
mnAlpha = nAlpha;
mpSprite->setAlpha( nAlpha );
}
void AnimatedSprite::clip( const ::basegfx::B2DPolyPolygon& rClip )
{
maClip = rClip;
mpSprite->setClipPixel( rClip );
}
void AnimatedSprite::clip()
{
maClip.reset();
mpSprite->setClip();
}
void AnimatedSprite::transform( const ::basegfx::B2DHomMatrix& rTransform )
{
mpSprite->transform( rTransform );
}
void AnimatedSprite::hide()
{
mpSprite->hide();
mbSpriteVisible = false;
}
void AnimatedSprite::show()
{
mbSpriteVisible = true;
mpSprite->show();
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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