LibreOffice Module canvas (master)  1
cairo_canvasbitmap.cxx
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19 
20 #include <sal/config.h>
21 #include <sal/log.hxx>
22 
24 #include <tools/diagnose_ex.h>
25 #include <utility>
26 #include <vcl/bitmapex.hxx>
27 #include <vcl/BitmapTools.hxx>
28 
29 #include <cairo.h>
30 
31 #include "cairo_canvasbitmap.hxx"
32 
33 using namespace ::cairo;
34 using namespace ::com::sun::star;
35 
36 namespace cairocanvas
37 {
38  CanvasBitmap::CanvasBitmap( const ::basegfx::B2ISize& rSize,
39  SurfaceProviderRef rSurfaceProvider,
40  rendering::XGraphicDevice* pDevice,
41  bool bHasAlpha ) :
42  mpSurfaceProvider(std::move( rSurfaceProvider )),
43  maSize(rSize),
44  mbHasAlpha(bHasAlpha)
45  {
46  ENSURE_OR_THROW( mpSurfaceProvider.is(),
47  "CanvasBitmap::CanvasBitmap(): Invalid surface or device" );
48 
49  SAL_INFO(
50  "canvas.cairo",
51  "bitmap size: " << rSize.getX() << "x" << rSize.getY());
52 
53  mpBufferSurface = mpSurfaceProvider->createSurface( rSize, bHasAlpha ? CAIRO_CONTENT_COLOR_ALPHA : CAIRO_CONTENT_COLOR );
54  mpBufferCairo = mpBufferSurface->getCairo();
55 
56  maCanvasHelper.init( rSize, *mpSurfaceProvider, pDevice );
57  maCanvasHelper.setSurface( mpBufferSurface, bHasAlpha );
58 
59  // clear bitmap to 100% transparent
60  maCanvasHelper.clear();
61  }
62 
64  {
65  mpSurfaceProvider.clear();
66 
67  mpBufferCairo.reset();
68  mpBufferSurface.reset();
69 
70  // forward to parent
71  CanvasBitmap_Base::disposeThis();
72  }
73 
75  {
76  return mpBufferSurface;
77  }
78 
79  SurfaceSharedPtr CanvasBitmap::createSurface( const ::basegfx::B2ISize& rSize, int aContent )
80  {
81  return mpSurfaceProvider->createSurface(rSize,aContent);
82  }
83 
85  {
86  return mpSurfaceProvider->createSurface(rBitmap);
87  }
88 
90  {
91  // non-modifiable surface here
92  return SurfaceSharedPtr();
93  }
94 
96  {
97  return mpSurfaceProvider->getOutputDevice();
98  }
99 
100  bool CanvasBitmap::repaint( const SurfaceSharedPtr& pSurface,
101  const rendering::ViewState& viewState,
102  const rendering::RenderState& renderState )
103  {
104  return maCanvasHelper.repaint( pSurface, viewState, renderState );
105  }
106 
107  uno::Any SAL_CALL CanvasBitmap::getFastPropertyValue( sal_Int32 nHandle )
108  {
109  uno::Any aRV( sal_Int32(0) );
110  // 0 ... get BitmapEx
111  // 1 ... get Pixbuf with bitmap RGB content
112  // 2 ... return nothing (empty Any)
113  switch( nHandle )
114  {
115  case 0:
116  {
117  aRV <<= reinterpret_cast<sal_Int64>( nullptr );
118  if ( !mbHasAlpha )
119  break;
120 
121  BitmapEx* pBitmapEx = vcl::bitmap::CreateFromCairoSurface(
122  ::Size( maSize.getX(), maSize.getY() ),
123  getSurface()->getCairoSurface().get());
124  if (pBitmapEx)
125  aRV <<= reinterpret_cast<sal_Int64>( pBitmapEx );
126 
127  break;
128  }
129  case 1:
130  {
131  aRV = getOutputDevice()->GetNativeSurfaceHandle(mpBufferSurface, maSize);
132  break;
133  }
134  case 2:
135  {
136  // Always return nothing - for the RGB surface support.
137  // Alpha code paths go via the above case 0.
138  aRV = uno::Any();
139  break;
140  }
141  }
142 
143  return aRV;
144  }
145 
147  {
148  return "CairoCanvas.CanvasBitmap";
149  }
150 
151  sal_Bool SAL_CALL CanvasBitmap::supportsService( const OUString& ServiceName )
152  {
153  return cppu::supportsService( this, ServiceName );
154  }
155 
156  uno::Sequence< OUString > SAL_CALL CanvasBitmap::getSupportedServiceNames( )
157  {
158  return { "com.sun.star.rendering.CanvasBitmap" };
159  }
160 
161 }
162 
163 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
sal_Int32 getY() const
virtual void disposeThis() override
Dispose all internal references.
const ::basegfx::B2ISize maSize
virtual OUString SAL_CALL getImplementationName() override
CanvasBitmap(const ::basegfx::B2ISize &rSize, SurfaceProviderRef rDevice, css::rendering::XGraphicDevice *pDevice, bool bHasAlpha)
Create a canvas bitmap for the given surface.
virtual css::uno::Any SAL_CALL getFastPropertyValue(sal_Int32 nHandle) override
virtual ::cairo::SurfaceSharedPtr getSurface() override
virtual ::cairo::SurfaceSharedPtr createSurface(const ::basegfx::B2ISize &rSize, int aContent) override
bool CPPUHELPER_DLLPUBLIC supportsService(css::lang::XServiceInfo *implementation, rtl::OUString const &name)
virtual sal_Bool SAL_CALL supportsService(const OUString &ServiceName) override
std::shared_ptr< Surface > SurfaceSharedPtr
virtual bool repaint(const ::cairo::SurfaceSharedPtr &pSurface, const css::rendering::ViewState &viewState, const css::rendering::RenderState &renderState) override
css::uno::Any GetNativeSurfaceHandle(cairo::SurfaceSharedPtr &rSurface, const basegfx::B2ISize &rSize) const
unsigned char sal_Bool
::cairo::SurfaceSharedPtr mpBufferSurface
SurfaceProviderRef mpSurfaceProvider
#define ENSURE_OR_THROW(c, m)
virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override
#define SAL_INFO(area, stream)
virtual ::cairo::SurfaceSharedPtr changeSurface() override
::rtl::Reference< SurfaceProvider > SurfaceProviderRef
sal_Int32 getX() const
virtual OutputDevice * getOutputDevice() override
::basegfx::B2IVector maSize
Definition: dx_9rm.cxx:116
::cairo::CairoSharedPtr mpBufferCairo