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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 <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: */