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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 .
*/
// must be first
#include <comphelper/diagnose_ex.hxx>
#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>
#include <utility>
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 aCanvasTransform(
mpViewLayer->getTransformation() );
if( !mxBitmap.is() ||
rMtf != mpLastMtf ||
aCanvasTransform != maLastTransformation )
{
// buffered bitmap is invalid, re-create
// determine transformed page bounds
::basegfx::B2DRectangle aTmpRect = ::canvas::tools::calcTransformedRectBounds(
maBounds,
aCanvasTransform );
// 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( aCanvasTransform );
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 = aCanvasTransform;
return mxBitmap.is();
}
ViewBackgroundShape::ViewBackgroundShape( ViewLayerSharedPtr xViewLayer,
const ::basegfx::B2DRectangle& rShapeBounds ) :
mpViewLayer(std::move( xViewLayer )),
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 xDestinationCanvas( mpViewLayer->getCanvas() );
if( !prefetch( xDestinationCanvas, 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
{
xDestinationCanvas->getUNOCanvas()->drawBitmap( mxBitmap,
xDestinationCanvas->getViewState(),
aRenderState );
}
catch( uno::Exception& )
{
TOOLS_WARN_EXCEPTION( "slideshow", "" );
return false;
}
return true;
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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