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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 "SlideRenderer.hxx"
#include <sdpage.hxx>
#include <toolkit/helper/vclunohelper.hxx>
#include <vcl/svapp.hxx>
#include <cppcanvas/vclfactory.hxx>
#include <cppuhelper/supportsservice.hxx>
using namespace ::com::sun::star;
using namespace ::com::sun::star::uno;
namespace sd::presenter {
//===== SlideRenderer ==========================================================
SlideRenderer::SlideRenderer ()
: SlideRendererInterfaceBase(m_aMutex),
maPreviewRenderer()
{
}
SlideRenderer::~SlideRenderer()
{
}
void SAL_CALL SlideRenderer::disposing()
{
}
//----- XInitialization -------------------------------------------------------
void SAL_CALL SlideRenderer::initialize (const Sequence<Any>& rArguments)
{
ThrowIfDisposed();
if (rArguments.hasElements())
{
throw RuntimeException("SlideRenderer: invalid number of arguments",
static_cast<XWeak*>(this));
}
}
OUString SlideRenderer::getImplementationName()
{
return "com.sun.star.comp.Draw.SlideRenderer";
}
sal_Bool SlideRenderer::supportsService(OUString const & ServiceName)
{
return cppu::supportsService(this, ServiceName);
}
css::uno::Sequence<OUString> SlideRenderer::getSupportedServiceNames()
{
return css::uno::Sequence<OUString>{"com.sun.star.drawing.SlideRenderer"};
}
//----- XSlideRenderer --------------------------------------------------------
Reference<awt::XBitmap> SlideRenderer::createPreview (
const Reference<drawing::XDrawPage>& rxSlide,
const awt::Size& rMaximalSize,
sal_Int16 nSuperSampleFactor)
{
ThrowIfDisposed();
SolarMutexGuard aGuard;
return VCLUnoHelper::CreateBitmap(
CreatePreview(rxSlide, rMaximalSize, nSuperSampleFactor));
}
Reference<rendering::XBitmap> SlideRenderer::createPreviewForCanvas (
const Reference<drawing::XDrawPage>& rxSlide,
const awt::Size& rMaximalSize,
sal_Int16 nSuperSampleFactor,
const Reference<rendering::XCanvas>& rxCanvas)
{
ThrowIfDisposed();
SolarMutexGuard aGuard;
cppcanvas::CanvasSharedPtr pCanvas (
cppcanvas::VCLFactory::createCanvas(rxCanvas));
if (pCanvas.get() != nullptr)
return cppcanvas::VCLFactory::createBitmap(
pCanvas,
CreatePreview(rxSlide, rMaximalSize, nSuperSampleFactor))->getUNOBitmap();
else
return nullptr;
}
awt::Size SAL_CALL SlideRenderer::calculatePreviewSize (
double nSlideAspectRatio,
const awt::Size& rMaximalSize)
{
if (rMaximalSize.Width <= 0
|| rMaximalSize.Height <= 0
|| nSlideAspectRatio <= 0)
{
return awt::Size(0,0);
}
const double nWindowAspectRatio (double(rMaximalSize.Width) / double(rMaximalSize.Height));
if (nSlideAspectRatio < nWindowAspectRatio)
return awt::Size(
sal::static_int_cast<sal_Int32>(rMaximalSize.Height * nSlideAspectRatio),
rMaximalSize.Height);
else
return awt::Size(
rMaximalSize.Width,
sal::static_int_cast<sal_Int32>(rMaximalSize.Width / nSlideAspectRatio));
}
BitmapEx SlideRenderer::CreatePreview (
const Reference<drawing::XDrawPage>& rxSlide,
const awt::Size& rMaximalSize,
sal_Int16 nSuperSampleFactor)
{
const SdPage* pPage = SdPage::getImplementation(rxSlide);
if (pPage == nullptr)
throw lang::IllegalArgumentException("SlideRenderer::createPreview() called with invalid slide",
static_cast<XWeak*>(this),
0);
// Determine the size of the current slide and its aspect ratio.
Size aPageSize = pPage->GetSize();
if (aPageSize.Height() <= 0)
throw lang::IllegalArgumentException("SlideRenderer::createPreview() called with invalid size",
static_cast<XWeak*>(this),
1);
// Compare with the aspect ratio of the window (which rMaximalSize
// assumed to be) and calculate the size of the preview so that it
// a) will have the aspect ratio of the page and
// b) will be as large as possible.
awt::Size aPreviewSize (calculatePreviewSize(
double(aPageSize.Width()) / double(aPageSize.Height()),
rMaximalSize));
if (aPreviewSize.Width <= 0 || aPreviewSize.Height <= 0)
return BitmapEx();
// Make sure that the super sample factor has a sane value.
sal_Int16 nFactor (nSuperSampleFactor);
if (nFactor < 1)
nFactor = 1;
else if (nFactor > 10)
nFactor = 10;
// Create the preview. When the super sample factor n is greater than 1
// then a preview is created in size (n*width, n*height) and then scaled
// down to (width, height). This is a poor mans antialiasing for the
// time being. When we have true antialiasing support this workaround
// can be removed.
const Image aPreview = maPreviewRenderer.RenderPage (
pPage,
Size(aPreviewSize.Width*nFactor, aPreviewSize.Height*nFactor),
true);
if (nFactor == 1)
return aPreview.GetBitmapEx();
else
{
BitmapEx aScaledPreview = aPreview.GetBitmapEx();
aScaledPreview.Scale(
Size(aPreviewSize.Width,aPreviewSize.Height),
BmpScaleFlag::BestQuality);
return aScaledPreview;
}
}
void SlideRenderer::ThrowIfDisposed()
{
if (SlideRendererInterfaceBase::rBHelper.bDisposed || SlideRendererInterfaceBase::rBHelper.bInDispose)
{
throw lang::DisposedException ("SlideRenderer object has already been disposed",
static_cast<uno::XWeak*>(this));
}
}
} // end of namespace ::sd::presenter
extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
com_sun_star_comp_Draw_SlideRenderer_get_implementation(css::uno::XComponentContext*,
css::uno::Sequence<css::uno::Any> const &)
{
return cppu::acquire(new sd::presenter::SlideRenderer);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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