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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 : #include <canvas/debug.hxx>
21 : #include <canvas/canvastools.hxx>
22 : #include <cppuhelper/supportsservice.hxx>
23 : #include <tools/diagnose_ex.h>
24 :
25 : #include "cairo_canvasbitmap.hxx"
26 :
27 : #include <vcl/bmpacc.hxx>
28 : #include <vcl/bitmapex.hxx>
29 :
30 : using namespace ::cairo;
31 : using namespace ::com::sun::star;
32 :
33 : namespace cairocanvas
34 : {
35 2 : CanvasBitmap::CanvasBitmap( const ::basegfx::B2ISize& rSize,
36 : const SurfaceProviderRef& rSurfaceProvider,
37 : rendering::XGraphicDevice* pDevice,
38 : bool bHasAlpha ) :
39 : mpSurfaceProvider( rSurfaceProvider ),
40 : mpBufferSurface(),
41 : mpBufferCairo(),
42 : maSize(rSize),
43 2 : mbHasAlpha(bHasAlpha)
44 : {
45 2 : ENSURE_OR_THROW( mpSurfaceProvider.is(),
46 : "CanvasBitmap::CanvasBitmap(): Invalid surface or device" );
47 :
48 : SAL_INFO(
49 : "canvas.cairo",
50 : "bitmap size: " << rSize.getX() << "x" << rSize.getY());
51 :
52 2 : mpBufferSurface = mpSurfaceProvider->createSurface( rSize, bHasAlpha ? CAIRO_CONTENT_COLOR_ALPHA : CAIRO_CONTENT_COLOR );
53 2 : mpBufferCairo = mpBufferSurface->getCairo();
54 :
55 2 : maCanvasHelper.init( rSize, *mpSurfaceProvider, pDevice );
56 2 : maCanvasHelper.setSurface( mpBufferSurface, bHasAlpha );
57 :
58 : // clear bitmap to 100% transparent
59 2 : maCanvasHelper.clear();
60 2 : }
61 :
62 2 : void CanvasBitmap::disposeThis()
63 : {
64 2 : mpSurfaceProvider.clear();
65 :
66 2 : mpBufferCairo.reset();
67 2 : mpBufferSurface.reset();
68 :
69 : // forward to parent
70 2 : CanvasBitmap_Base::disposeThis();
71 2 : }
72 :
73 2 : SurfaceSharedPtr CanvasBitmap::getSurface()
74 : {
75 2 : return mpBufferSurface;
76 : }
77 :
78 0 : SurfaceSharedPtr CanvasBitmap::createSurface( const ::basegfx::B2ISize& rSize, int aContent )
79 : {
80 0 : return mpSurfaceProvider->createSurface(rSize,aContent);
81 : }
82 :
83 0 : SurfaceSharedPtr CanvasBitmap::createSurface( ::Bitmap& rBitmap )
84 : {
85 0 : return mpSurfaceProvider->createSurface(rBitmap);
86 : }
87 :
88 0 : SurfaceSharedPtr CanvasBitmap::changeSurface( bool, bool )
89 : {
90 : // non-modifiable surface here
91 0 : return SurfaceSharedPtr();
92 : }
93 :
94 0 : OutputDevice* CanvasBitmap::getOutputDevice()
95 : {
96 0 : return mpSurfaceProvider->getOutputDevice();
97 : }
98 :
99 0 : bool CanvasBitmap::repaint( const SurfaceSharedPtr& pSurface,
100 : const rendering::ViewState& viewState,
101 : const rendering::RenderState& renderState )
102 : {
103 0 : return maCanvasHelper.repaint( pSurface, viewState, renderState );
104 : }
105 :
106 2 : uno::Any SAL_CALL CanvasBitmap::getFastPropertyValue( sal_Int32 nHandle ) throw (uno::RuntimeException, std::exception)
107 : {
108 2 : uno::Any aRV( sal_Int32(0) );
109 : // 0 ... get BitmapEx
110 : // 1 ... get Pixbuf with bitmap RGB content
111 : // 2 ... get Pixbuf with bitmap alpha mask
112 2 : switch( nHandle )
113 : {
114 : case 0:
115 : {
116 2 : aRV = uno::Any( reinterpret_cast<sal_Int64>( nullptr ) );
117 2 : if ( !mbHasAlpha )
118 0 : break;
119 :
120 2 : ::Size aSize( maSize.getX(), maSize.getY() );
121 : // FIXME: if we could teach VCL/ about cairo handles, life could
122 : // be significantly better here perhaps.
123 : cairo_surface_t *pPixels;
124 : pPixels = cairo_image_surface_create( CAIRO_FORMAT_ARGB32,
125 2 : aSize.Width(), aSize.Height() );
126 2 : cairo_t *pCairo = cairo_create( pPixels );
127 2 : if( !pPixels || !pCairo || cairo_status(pCairo) != CAIRO_STATUS_SUCCESS )
128 0 : break;
129 :
130 : // suck ourselves from the X server to this buffer so then we can fiddle with
131 : // Alpha to turn it into the ultra-lame vcl required format and then push it
132 : // all back again later at vast expense [ urgh ]
133 2 : cairo_set_source_surface( pCairo, getSurface()->getCairoSurface().get(), 0, 0 );
134 2 : cairo_set_operator( pCairo, CAIRO_OPERATOR_SOURCE );
135 2 : cairo_paint( pCairo );
136 :
137 2 : ::Bitmap aRGB( aSize, 24 );
138 4 : ::AlphaMask aMask( aSize );
139 :
140 2 : BitmapWriteAccess *pRGBWrite( aRGB.AcquireWriteAccess() );
141 2 : if( pRGBWrite )
142 : {
143 2 : BitmapWriteAccess *pMaskWrite( aMask.AcquireWriteAccess() );
144 2 : if( pMaskWrite )
145 : {
146 2 : cairo_surface_flush(pPixels);
147 2 : unsigned char *pSrc = cairo_image_surface_get_data( pPixels );
148 2 : unsigned int nStride = cairo_image_surface_get_stride( pPixels );
149 808 : for( unsigned long y = 0; y < (unsigned long) aSize.Height(); y++ )
150 : {
151 806 : sal_uInt32 *pPix = reinterpret_cast<sal_uInt32 *>(pSrc + nStride * y);
152 432822 : for( unsigned long x = 0; x < (unsigned long) aSize.Width(); x++ )
153 : {
154 432016 : sal_uInt8 nAlpha = (*pPix >> 24);
155 432016 : sal_uInt8 nR = (*pPix >> 16) & 0xff;
156 432016 : sal_uInt8 nG = (*pPix >> 8) & 0xff;
157 432016 : sal_uInt8 nB = *pPix & 0xff;
158 432016 : if( nAlpha != 0 && nAlpha != 255 )
159 : {
160 : // Cairo uses pre-multiplied alpha - we do not => re-multiply
161 1872 : nR = (sal_uInt8) MinMax( ((sal_uInt32)nR * 255) / nAlpha, 0, 255 );
162 1872 : nG = (sal_uInt8) MinMax( ((sal_uInt32)nG * 255) / nAlpha, 0, 255 );
163 1872 : nB = (sal_uInt8) MinMax( ((sal_uInt32)nB * 255) / nAlpha, 0, 255 );
164 : }
165 432016 : pRGBWrite->SetPixel( y, x, BitmapColor( nR, nG, nB ) );
166 432016 : pMaskWrite->SetPixelIndex( y, x, 255 - nAlpha );
167 432016 : pPix++;
168 : }
169 : }
170 2 : aMask.ReleaseAccess( pMaskWrite );
171 : }
172 2 : ::Bitmap::ReleaseAccess( pRGBWrite );
173 : }
174 :
175 : // ignore potential errors above. will get caller a
176 : // uniformely white bitmap, but not that there would
177 : // be error handling in calling code ...
178 2 : ::BitmapEx *pBitmapEx = new ::BitmapEx( aRGB, aMask );
179 :
180 2 : cairo_destroy( pCairo );
181 2 : cairo_surface_destroy( pPixels );
182 :
183 2 : aRV = uno::Any( reinterpret_cast<sal_Int64>( pBitmapEx ) );
184 4 : break;
185 : }
186 : case 1:
187 : {
188 0 : aRV = getOutputDevice()->GetNativeSurfaceHandle(mpBufferSurface, maSize);
189 0 : break;
190 : }
191 : case 2:
192 : {
193 : // Always return nothing - for the RGB surface support.
194 : // Alpha code paths go via the above case 0.
195 0 : aRV = uno::Any();
196 0 : break;
197 : }
198 : }
199 :
200 2 : return aRV;
201 : }
202 :
203 0 : OUString SAL_CALL CanvasBitmap::getImplementationName( ) throw (uno::RuntimeException, std::exception)
204 : {
205 0 : return OUString( "CairoCanvas.CanvasBitmap" );
206 : }
207 :
208 0 : sal_Bool SAL_CALL CanvasBitmap::supportsService( const OUString& ServiceName ) throw (uno::RuntimeException, std::exception)
209 : {
210 0 : return cppu::supportsService( this, ServiceName );
211 : }
212 :
213 0 : uno::Sequence< OUString > SAL_CALL CanvasBitmap::getSupportedServiceNames( ) throw (uno::RuntimeException, std::exception)
214 : {
215 0 : uno::Sequence< OUString > aRet(1);
216 0 : aRet[0] = "com.sun.star.rendering.CanvasBitmap";
217 :
218 0 : return aRet;
219 : }
220 :
221 6 : }
222 :
223 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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