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Diffstat (limited to '')
| -rw-r--r-- | slideshow/source/engine/animatedsprite.cxx | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/slideshow/source/engine/animatedsprite.cxx b/slideshow/source/engine/animatedsprite.cxx new file mode 100644 index 000000000..94ee9e313 --- /dev/null +++ b/slideshow/source/engine/animatedsprite.cxx @@ -0,0 +1,199 @@ +/* -*- 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 <tools/diagnose_ex.h> + +#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> + + +using namespace ::com::sun::star; + +namespace slideshow::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(), + 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; + } + + 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.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 ) + 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: */ |