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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 :
21 : #include "SlideRenderer.hxx"
22 : #include "sdpage.hxx"
23 : #include <toolkit/helper/vclunohelper.hxx>
24 : #include <com/sun/star/rendering/XBitmapCanvas.hpp>
25 : #include <osl/mutex.hxx>
26 : #include <vcl/svapp.hxx>
27 : #include <cppcanvas/vclfactory.hxx>
28 :
29 : using namespace ::com::sun::star;
30 : using namespace ::com::sun::star::uno;
31 :
32 : namespace sd { namespace presenter {
33 :
34 : //===== Service ===============================================================
35 :
36 0 : Reference<XInterface> SAL_CALL SlideRenderer_createInstance (
37 : const Reference<XComponentContext>& rxContext)
38 : {
39 0 : return Reference<XInterface>(static_cast<XWeak*>(new SlideRenderer(rxContext)));
40 : }
41 :
42 :
43 :
44 :
45 0 : OUString SlideRenderer_getImplementationName (void) throw(RuntimeException)
46 : {
47 0 : return OUString("com.sun.star.comp.Draw.SlideRenderer");
48 : }
49 :
50 :
51 :
52 :
53 0 : Sequence<OUString> SAL_CALL SlideRenderer_getSupportedServiceNames (void)
54 : throw (RuntimeException)
55 : {
56 0 : static const OUString sServiceName("com.sun.star.drawing.SlideRenderer");
57 0 : return Sequence<OUString>(&sServiceName, 1);
58 : }
59 :
60 :
61 :
62 :
63 : //===== SlideRenderer ==========================================================
64 :
65 0 : SlideRenderer::SlideRenderer (const Reference<XComponentContext>& rxContext)
66 : : SlideRendererInterfaceBase(m_aMutex),
67 0 : maPreviewRenderer()
68 : {
69 : (void)rxContext;
70 0 : }
71 :
72 :
73 :
74 :
75 0 : SlideRenderer::~SlideRenderer (void)
76 : {
77 0 : }
78 :
79 :
80 :
81 :
82 0 : void SAL_CALL SlideRenderer::disposing (void)
83 : {
84 0 : }
85 :
86 :
87 :
88 :
89 : //----- XInitialization -------------------------------------------------------
90 :
91 0 : void SAL_CALL SlideRenderer::initialize (const Sequence<Any>& rArguments)
92 : throw (Exception, RuntimeException, std::exception)
93 : {
94 0 : ThrowIfDisposed();
95 :
96 0 : if (rArguments.getLength() != 0)
97 : {
98 : throw RuntimeException("SlideRenderer: invalid number of arguments",
99 0 : static_cast<XWeak*>(this));
100 : }
101 0 : }
102 :
103 :
104 :
105 :
106 : //----- XSlideRenderer --------------------------------------------------------
107 :
108 0 : Reference<awt::XBitmap> SlideRenderer::createPreview (
109 : const Reference<drawing::XDrawPage>& rxSlide,
110 : const awt::Size& rMaximalSize,
111 : sal_Int16 nSuperSampleFactor)
112 : throw (css::uno::RuntimeException, std::exception)
113 : {
114 0 : ThrowIfDisposed();
115 0 : SolarMutexGuard aGuard;
116 :
117 : return VCLUnoHelper::CreateBitmap(
118 0 : CreatePreview(rxSlide, rMaximalSize, nSuperSampleFactor));
119 : }
120 :
121 :
122 :
123 :
124 0 : Reference<rendering::XBitmap> SlideRenderer::createPreviewForCanvas (
125 : const Reference<drawing::XDrawPage>& rxSlide,
126 : const awt::Size& rMaximalSize,
127 : sal_Int16 nSuperSampleFactor,
128 : const Reference<rendering::XCanvas>& rxCanvas)
129 : throw (css::uno::RuntimeException, std::exception)
130 : {
131 0 : ThrowIfDisposed();
132 0 : SolarMutexGuard aGuard;
133 :
134 : cppcanvas::CanvasSharedPtr pCanvas (
135 0 : cppcanvas::VCLFactory::getInstance().createCanvas(rxCanvas));
136 0 : if (pCanvas.get() != NULL)
137 0 : return cppcanvas::VCLFactory::getInstance().createBitmap(
138 : pCanvas,
139 0 : CreatePreview(rxSlide, rMaximalSize, nSuperSampleFactor))->getUNOBitmap();
140 : else
141 0 : return NULL;
142 : }
143 :
144 :
145 :
146 :
147 0 : awt::Size SAL_CALL SlideRenderer::calculatePreviewSize (
148 : double nSlideAspectRatio,
149 : const awt::Size& rMaximalSize)
150 : throw (css::uno::RuntimeException, std::exception)
151 : {
152 0 : if (rMaximalSize.Width <= 0
153 0 : || rMaximalSize.Height <= 0
154 0 : || nSlideAspectRatio <= 0)
155 : {
156 0 : return awt::Size(0,0);
157 : }
158 :
159 0 : const double nWindowAspectRatio (double(rMaximalSize.Width) / double(rMaximalSize.Height));
160 0 : if (nSlideAspectRatio < nWindowAspectRatio)
161 : return awt::Size(
162 0 : sal::static_int_cast<sal_Int32>(rMaximalSize.Height * nSlideAspectRatio),
163 0 : rMaximalSize.Height);
164 : else
165 : return awt::Size(
166 : rMaximalSize.Width,
167 0 : sal::static_int_cast<sal_Int32>(rMaximalSize.Width / nSlideAspectRatio));
168 : }
169 :
170 :
171 :
172 :
173 :
174 :
175 0 : BitmapEx SlideRenderer::CreatePreview (
176 : const Reference<drawing::XDrawPage>& rxSlide,
177 : const awt::Size& rMaximalSize,
178 : sal_Int16 nSuperSampleFactor)
179 : throw (css::uno::RuntimeException)
180 : {
181 0 : const SdPage* pPage = SdPage::getImplementation(rxSlide);
182 0 : if (pPage == NULL)
183 : throw lang::IllegalArgumentException("SlideRenderer::createPreview() called with invalid slide",
184 : static_cast<XWeak*>(this),
185 0 : 0);
186 :
187 : // Determine the size of the current slide and its aspect ratio.
188 0 : Size aPageSize = pPage->GetSize();
189 0 : if (aPageSize.Height() <= 0)
190 : throw lang::IllegalArgumentException("SlideRenderer::createPreview() called with invalid size",
191 : static_cast<XWeak*>(this),
192 0 : 1);
193 :
194 : // Compare with the aspect ratio of the window (which rMaximalSize
195 : // assumed to be) and calculate the size of the preview so that it
196 : // a) will have the aspect ratio of the page and
197 : // b) will be as large as possible.
198 : awt::Size aPreviewSize (calculatePreviewSize(
199 0 : double(aPageSize.Width()) / double(aPageSize.Height()),
200 0 : rMaximalSize));
201 0 : if (aPreviewSize.Width <= 0 || aPreviewSize.Height <= 0)
202 0 : return BitmapEx();
203 :
204 : // Make sure that the super sample factor has a sane value.
205 0 : sal_Int16 nFactor (nSuperSampleFactor);
206 0 : if (nFactor < 1)
207 0 : nFactor = 1;
208 0 : else if (nFactor > 10)
209 0 : nFactor = 10;
210 :
211 : // Create the preview. When the super sample factor n is greater than 1
212 : // then a preview is created in size (n*width, n*height) and then scaled
213 : // down to (width, height). This is a poor mans antialiasing for the
214 : // time being. When we have true antialiasing support this workaround
215 : // can be removed.
216 : const Image aPreview = maPreviewRenderer.RenderPage (
217 : pPage,
218 : Size(aPreviewSize.Width*nFactor, aPreviewSize.Height*nFactor),
219 0 : OUString());
220 0 : if (nFactor == 1)
221 0 : return aPreview.GetBitmapEx();
222 : else
223 : {
224 0 : BitmapEx aScaledPreview = aPreview.GetBitmapEx();
225 : aScaledPreview.Scale(
226 : Size(aPreviewSize.Width,aPreviewSize.Height),
227 0 : BMP_SCALE_BESTQUALITY);
228 0 : return aScaledPreview;
229 0 : }
230 : }
231 :
232 :
233 :
234 :
235 0 : void SlideRenderer::ThrowIfDisposed (void)
236 : throw (::com::sun::star::lang::DisposedException)
237 : {
238 0 : if (SlideRendererInterfaceBase::rBHelper.bDisposed || SlideRendererInterfaceBase::rBHelper.bInDispose)
239 : {
240 : throw lang::DisposedException ("SlideRenderer object has already been disposed",
241 0 : static_cast<uno::XWeak*>(this));
242 : }
243 0 : }
244 :
245 :
246 : } } // end of namespace ::sd::presenter
247 :
248 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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