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Diffstat (limited to 'slideshow/source/engine/shapes/viewbackgroundshape.cxx')
| -rw-r--r-- | slideshow/source/engine/shapes/viewbackgroundshape.cxx | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/slideshow/source/engine/shapes/viewbackgroundshape.cxx b/slideshow/source/engine/shapes/viewbackgroundshape.cxx new file mode 100644 index 000000000..e0ca333ad --- /dev/null +++ b/slideshow/source/engine/shapes/viewbackgroundshape.cxx @@ -0,0 +1,188 @@ +/* -*- 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 . + */ + + +// must be first +#include <tools/diagnose_ex.h> +#include <sal/log.hxx> + +#include "viewbackgroundshape.hxx" +#include <tools.hxx> + +#include <basegfx/numeric/ftools.hxx> +#include <basegfx/matrix/b2dhommatrix.hxx> +#include <basegfx/matrix/b2dhommatrixtools.hxx> + +#include <com/sun/star/rendering/XCanvas.hpp> + +#include <canvas/canvastools.hxx> +#include <cppcanvas/vclfactory.hxx> +#include <cppcanvas/basegfxfactory.hxx> +#include <cppcanvas/renderer.hxx> +#include <cppcanvas/bitmap.hxx> + +using namespace ::com::sun::star; + + +namespace slideshow::internal +{ + + bool ViewBackgroundShape::prefetch( const ::cppcanvas::CanvasSharedPtr& rDestinationCanvas, + const GDIMetaFileSharedPtr& rMtf ) const + { + SAL_INFO( "slideshow", "::presentation::internal::ViewBackgroundShape::prefetch()" ); + ENSURE_OR_RETURN_FALSE( rMtf, + "ViewBackgroundShape::prefetch(): no valid metafile!" ); + + const ::basegfx::B2DHomMatrix& rCanvasTransform( + mpViewLayer->getTransformation() ); + + if( !mxBitmap.is() || + rMtf != mpLastMtf || + rCanvasTransform != maLastTransformation ) + { + // buffered bitmap is invalid, re-create + + // determine transformed page bounds + ::basegfx::B2DRectangle aTmpRect; + ::canvas::tools::calcTransformedRectBounds( aTmpRect, + maBounds, + rCanvasTransform ); + + // determine pixel size of bitmap (choose it one pixel + // larger, as polygon rendering takes one pixel more + // to the right and to the bottom) + const ::basegfx::B2ISize aBmpSizePixel( + ::basegfx::fround( aTmpRect.getRange().getX() + 1), + ::basegfx::fround( aTmpRect.getRange().getY() + 1) ); + + // create a bitmap of appropriate size + ::cppcanvas::BitmapSharedPtr pBitmap( + ::cppcanvas::BaseGfxFactory::createBitmap( + rDestinationCanvas, + aBmpSizePixel ) ); + + ENSURE_OR_THROW( pBitmap, + "ViewBackgroundShape::prefetch(): Cannot create background bitmap" ); + + ::cppcanvas::BitmapCanvasSharedPtr pBitmapCanvas( pBitmap->getBitmapCanvas() ); + + ENSURE_OR_THROW( pBitmapCanvas, + "ViewBackgroundShape::prefetch(): Cannot create background bitmap canvas" ); + + // clear bitmap + initSlideBackground( pBitmapCanvas, + aBmpSizePixel ); + + // apply linear part of destination canvas transformation (linear means in this context: + // transformation without any translational components) + ::basegfx::B2DHomMatrix aLinearTransform( rCanvasTransform ); + aLinearTransform.set( 0, 2, 0.0 ); + aLinearTransform.set( 1, 2, 0.0 ); + pBitmapCanvas->setTransformation( aLinearTransform ); + + const basegfx::B2DHomMatrix aShapeTransform(basegfx::utils::createScaleTranslateB2DHomMatrix( + maBounds.getWidth(), maBounds.getHeight(), + maBounds.getMinX(), maBounds.getMinY())); + + ::cppcanvas::RendererSharedPtr pRenderer( + ::cppcanvas::VCLFactory::createRenderer( + pBitmapCanvas, + *rMtf, + ::cppcanvas::Renderer::Parameters() ) ); + + ENSURE_OR_RETURN_FALSE( pRenderer, + "ViewBackgroundShape::prefetch(): Could not create Renderer" ); + + pRenderer->setTransformation( aShapeTransform ); + pRenderer->draw(); + + mxBitmap = pBitmap->getUNOBitmap(); + } + + mpLastMtf = rMtf; + maLastTransformation = rCanvasTransform; + + return mxBitmap.is(); + } + + ViewBackgroundShape::ViewBackgroundShape( const ViewLayerSharedPtr& rViewLayer, + const ::basegfx::B2DRectangle& rShapeBounds ) : + mpViewLayer( rViewLayer ), + mxBitmap(), + mpLastMtf(), + maLastTransformation(), + maBounds( rShapeBounds ) + { + ENSURE_OR_THROW( mpViewLayer, "ViewBackgroundShape::ViewBackgroundShape(): Invalid View" ); + ENSURE_OR_THROW( mpViewLayer->getCanvas(), "ViewBackgroundShape::ViewBackgroundShape(): Invalid ViewLayer canvas" ); + } + + const ViewLayerSharedPtr& ViewBackgroundShape::getViewLayer() const + { + return mpViewLayer; + } + + bool ViewBackgroundShape::render( const GDIMetaFileSharedPtr& rMtf ) const + { + SAL_INFO( "slideshow", "::presentation::internal::ViewBackgroundShape::draw()" ); + + const ::cppcanvas::CanvasSharedPtr& rDestinationCanvas( mpViewLayer->getCanvas() ); + + if( !prefetch( rDestinationCanvas, rMtf ) ) + return false; + + ENSURE_OR_RETURN_FALSE( mxBitmap.is(), + "ViewBackgroundShape::draw(): Invalid background bitmap" ); + + ::basegfx::B2DHomMatrix aTransform( mpViewLayer->getTransformation() ); + + // invert the linear part of the view transformation + // (i.e. the view transformation without translational + // components), to be able to leave the canvas + // transformation intact (would otherwise destroy possible + // clippings, as the clip polygon is relative to the view + // coordinate system). + aTransform.set(0,2, 0.0 ); + aTransform.set(1,2, 0.0 ); + aTransform.invert(); + + rendering::RenderState aRenderState; + ::canvas::tools::initRenderState( aRenderState ); + + ::canvas::tools::setRenderStateTransform( aRenderState, aTransform ); + + try + { + rDestinationCanvas->getUNOCanvas()->drawBitmap( mxBitmap, + rDestinationCanvas->getViewState(), + aRenderState ); + } + catch( uno::Exception& ) + { + TOOLS_WARN_EXCEPTION( "slideshow", "" ); + return false; + } + + return true; + } + +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |