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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 : #ifdef CAIRO_HAS_XLIB_SURFACE
31 : # include "cairo_xlib_cairo.hxx"
32 : #elif defined CAIRO_HAS_QUARTZ_SURFACE
33 : # include "cairo_quartz_cairo.hxx"
34 : #elif defined CAIRO_HAS_WIN32_SURFACE
35 : # include "cairo_win32_cairo.hxx"
36 : # include <cairo-win32.h>
37 : #else
38 : # error Native API needed.
39 : #endif
40 :
41 : using namespace ::cairo;
42 : using namespace ::com::sun::star;
43 :
44 : #ifdef CAIRO_HAS_WIN32_SURFACE
45 : namespace
46 : {
47 : HBITMAP surface2HBitmap( const SurfaceSharedPtr& rSurface, const basegfx::B2ISize& rSize )
48 : {
49 : // cant seem to retrieve HBITMAP from cairo. copy content then
50 : HDC hScreenDC=GetDC(NULL);
51 : HBITMAP hBmpBitmap = CreateCompatibleBitmap( hScreenDC,
52 : rSize.getX(),
53 : rSize.getY() );
54 :
55 : HDC hBmpDC = CreateCompatibleDC( 0 );
56 : HBITMAP hBmpOld = (HBITMAP) SelectObject( hBmpDC, hBmpBitmap );
57 :
58 : BitBlt( hBmpDC, 0, 0, rSize.getX(), rSize.getX(),
59 : cairo_win32_surface_get_dc(rSurface->getCairoSurface().get()),
60 : 0, 0, SRCCOPY );
61 :
62 : SelectObject( hBmpDC, hBmpOld );
63 : DeleteDC( hBmpDC );
64 :
65 : return hBmpBitmap;
66 : }
67 : }
68 : #endif
69 :
70 : namespace cairocanvas
71 : {
72 0 : CanvasBitmap::CanvasBitmap( const ::basegfx::B2ISize& rSize,
73 : const SurfaceProviderRef& rSurfaceProvider,
74 : rendering::XGraphicDevice* pDevice,
75 : bool bHasAlpha ) :
76 : mpSurfaceProvider( rSurfaceProvider ),
77 : mpBufferSurface(),
78 : mpBufferCairo(),
79 : maSize(rSize),
80 0 : mbHasAlpha(bHasAlpha)
81 : {
82 0 : ENSURE_OR_THROW( mpSurfaceProvider.is(),
83 : "CanvasBitmap::CanvasBitmap(): Invalid surface or device" );
84 :
85 : OSL_TRACE( "bitmap size: %dx%d", rSize.getX(), rSize.getY() );
86 :
87 0 : mpBufferSurface = mpSurfaceProvider->createSurface( rSize, bHasAlpha ? CAIRO_CONTENT_COLOR_ALPHA : CAIRO_CONTENT_COLOR );
88 0 : mpBufferCairo = mpBufferSurface->getCairo();
89 :
90 0 : maCanvasHelper.init( rSize, *mpSurfaceProvider, pDevice );
91 0 : maCanvasHelper.setSurface( mpBufferSurface, bHasAlpha );
92 :
93 : // clear bitmap to 100% transparent
94 0 : maCanvasHelper.clear();
95 0 : }
96 :
97 0 : void CanvasBitmap::disposeThis()
98 : {
99 0 : mpSurfaceProvider.clear();
100 :
101 0 : mpBufferCairo.reset();
102 0 : mpBufferSurface.reset();
103 :
104 : // forward to parent
105 0 : CanvasBitmap_Base::disposeThis();
106 0 : }
107 :
108 0 : SurfaceSharedPtr CanvasBitmap::getSurface()
109 : {
110 0 : return mpBufferSurface;
111 : }
112 :
113 0 : SurfaceSharedPtr CanvasBitmap::createSurface( const ::basegfx::B2ISize& rSize, Content aContent )
114 : {
115 0 : return mpSurfaceProvider->createSurface(rSize,aContent);
116 : }
117 :
118 0 : SurfaceSharedPtr CanvasBitmap::createSurface( ::Bitmap& rBitmap )
119 : {
120 0 : return mpSurfaceProvider->createSurface(rBitmap);
121 : }
122 :
123 0 : SurfaceSharedPtr CanvasBitmap::changeSurface( bool, bool )
124 : {
125 : // non-modifiable surface here
126 0 : return SurfaceSharedPtr();
127 : }
128 :
129 0 : OutputDevice* CanvasBitmap::getOutputDevice()
130 : {
131 0 : return mpSurfaceProvider->getOutputDevice();
132 : }
133 :
134 0 : bool CanvasBitmap::repaint( const SurfaceSharedPtr& pSurface,
135 : const rendering::ViewState& viewState,
136 : const rendering::RenderState& renderState )
137 : {
138 0 : return maCanvasHelper.repaint( pSurface, viewState, renderState );
139 : }
140 :
141 0 : uno::Any SAL_CALL CanvasBitmap::getFastPropertyValue( sal_Int32 nHandle ) throw (uno::RuntimeException, std::exception)
142 : {
143 0 : uno::Any aRV( sal_Int32(0) );
144 : // 0 ... get BitmapEx
145 : // 1 ... get Pixbuf with bitmap RGB content
146 : // 2 ... get Pixbuf with bitmap alpha mask
147 0 : switch( nHandle )
148 : {
149 : case 0:
150 : {
151 0 : aRV = uno::Any( reinterpret_cast<sal_Int64>( (BitmapEx *) NULL ) );
152 0 : if ( !mbHasAlpha )
153 0 : break;
154 :
155 0 : ::Size aSize( maSize.getX(), maSize.getY() );
156 : // FIXME: if we could teach VCL/ about cairo handles, life could
157 : // be significantly better here perhaps.
158 : cairo_surface_t *pPixels;
159 : pPixels = cairo_image_surface_create( CAIRO_FORMAT_ARGB32,
160 0 : aSize.Width(), aSize.Height() );
161 0 : cairo_t *pCairo = cairo_create( pPixels );
162 0 : if( !pPixels || !pCairo )
163 : break;
164 :
165 : // suck ourselves from the X server to this buffer so then we can fiddle with
166 : // Alpha to turn it into the ultra-lame vcl required format and then push it
167 : // all back again later at vast expense [ urgh ]
168 0 : cairo_set_source_surface( pCairo, getSurface()->getCairoSurface().get(), 0, 0 );
169 0 : cairo_set_operator( pCairo, CAIRO_OPERATOR_SOURCE );
170 0 : cairo_paint( pCairo );
171 :
172 0 : ::Bitmap aRGB( aSize, 24 );
173 0 : ::AlphaMask aMask( aSize );
174 :
175 0 : BitmapWriteAccess *pRGBWrite( aRGB.AcquireWriteAccess() );
176 0 : if( pRGBWrite )
177 : {
178 0 : BitmapWriteAccess *pMaskWrite( aMask.AcquireWriteAccess() );
179 0 : if( pMaskWrite )
180 : {
181 0 : cairo_surface_flush(pPixels);
182 0 : unsigned char *pSrc = cairo_image_surface_get_data( pPixels );
183 0 : unsigned int nStride = cairo_image_surface_get_stride( pPixels );
184 0 : for( unsigned long y = 0; y < (unsigned long) aSize.Height(); y++ )
185 : {
186 0 : sal_uInt32 *pPix = (sal_uInt32 *)(pSrc + nStride * y);
187 0 : for( unsigned long x = 0; x < (unsigned long) aSize.Width(); x++ )
188 : {
189 0 : sal_uInt8 nAlpha = (*pPix >> 24);
190 0 : sal_uInt8 nR = (*pPix >> 16) & 0xff;
191 0 : sal_uInt8 nG = (*pPix >> 8) & 0xff;
192 0 : sal_uInt8 nB = *pPix & 0xff;
193 0 : if( nAlpha != 0 && nAlpha != 255 )
194 : {
195 : // Cairo uses pre-multiplied alpha - we do not => re-multiply
196 0 : nR = (sal_uInt8) MinMax( ((sal_uInt32)nR * 255) / nAlpha, 0, 255 );
197 0 : nG = (sal_uInt8) MinMax( ((sal_uInt32)nG * 255) / nAlpha, 0, 255 );
198 0 : nB = (sal_uInt8) MinMax( ((sal_uInt32)nB * 255) / nAlpha, 0, 255 );
199 : }
200 0 : pRGBWrite->SetPixel( y, x, BitmapColor( nR, nG, nB ) );
201 0 : pMaskWrite->SetPixelIndex( y, x, 255 - nAlpha );
202 0 : pPix++;
203 : }
204 : }
205 0 : aMask.ReleaseAccess( pMaskWrite );
206 : }
207 0 : aRGB.ReleaseAccess( pRGBWrite );
208 : }
209 :
210 : // ignore potential errors above. will get caller a
211 : // uniformely white bitmap, but not that there would
212 : // be error handling in calling code ...
213 0 : ::BitmapEx *pBitmapEx = new ::BitmapEx( aRGB, aMask );
214 :
215 0 : cairo_destroy( pCairo );
216 0 : cairo_surface_destroy( pPixels );
217 :
218 0 : aRV = uno::Any( reinterpret_cast<sal_Int64>( pBitmapEx ) );
219 0 : break;
220 : }
221 : case 1:
222 : {
223 : #ifdef CAIRO_HAS_XLIB_SURFACE
224 0 : X11Surface* pXlibSurface=dynamic_cast<X11Surface*>(mpBufferSurface.get());
225 : OSL_ASSERT(pXlibSurface);
226 0 : uno::Sequence< uno::Any > args( 3 );
227 0 : args[0] = uno::Any( false ); // do not call XFreePixmap on it
228 0 : args[1] = uno::Any( pXlibSurface->getPixmap()->mhDrawable );
229 0 : args[2] = uno::Any( sal_Int32( pXlibSurface->getDepth() ) );
230 :
231 0 : aRV = uno::Any( args );
232 : #elif defined CAIRO_HAS_QUARTZ_SURFACE
233 : QuartzSurface* pQuartzSurface = dynamic_cast<QuartzSurface*>(mpBufferSurface.get());
234 : OSL_ASSERT(pQuartzSurface);
235 : uno::Sequence< uno::Any > args( 1 );
236 : args[0] = uno::Any( sal_IntPtr (pQuartzSurface->getCGContext()) );
237 : aRV = uno::Any( args );
238 : #elif defined CAIRO_HAS_WIN32_SURFACE
239 : // TODO(F2): check whether under all circumstances,
240 : // the alpha channel is ignored here.
241 : uno::Sequence< uno::Any > args( 1 );
242 : args[1] = uno::Any( sal_Int64(surface2HBitmap(mpBufferSurface,maSize)) );
243 :
244 : aRV = uno::Any( args );
245 : // caller frees the bitmap
246 : #else
247 : # error Please define fast prop retrieval for your platform!
248 : #endif
249 0 : break;
250 : }
251 : case 2:
252 : {
253 : // Always return nothing - for the RGB surface support.
254 : // Alpha code paths go via the above case 0.
255 0 : aRV = uno::Any();
256 0 : break;
257 : }
258 : }
259 :
260 0 : return aRV;
261 : }
262 :
263 0 : OUString SAL_CALL CanvasBitmap::getImplementationName( ) throw (uno::RuntimeException, std::exception)
264 : {
265 0 : return OUString( "CairoCanvas.CanvasBitmap" );
266 : }
267 :
268 0 : sal_Bool SAL_CALL CanvasBitmap::supportsService( const OUString& ServiceName ) throw (uno::RuntimeException, std::exception)
269 : {
270 0 : return cppu::supportsService( this, ServiceName );
271 : }
272 :
273 0 : uno::Sequence< OUString > SAL_CALL CanvasBitmap::getSupportedServiceNames( ) throw (uno::RuntimeException, std::exception)
274 : {
275 0 : uno::Sequence< OUString > aRet(1);
276 0 : aRet[0] = "com.sun.star.rendering.CanvasBitmap";
277 :
278 0 : return aRet;
279 : }
280 :
281 0 : }
282 :
283 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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