#include <wx/graphics.h>
A wxGraphicsRenderer is the instance corresponding to the rendering engine used.
There may be multiple instances on a system, if there are different rendering engines present, but there is always only one instance per engine. This instance is pointed back to by all objects created by it (wxGraphicsContext, wxGraphicsPath etc) and can be retrieved through their wxGraphicsObject::GetRenderer() method. Therefore you can create an additional instance of a path etc. by calling wxGraphicsObject::GetRenderer() and then using the appropriate CreateXXX() function of that renderer.
Public Member Functions | |
virtual wxGraphicsBitmap | CreateBitmap (const wxBitmap &bitmap)=0 |
Creates wxGraphicsBitmap from an existing wxBitmap. More... | |
virtual wxGraphicsBitmap | CreateBitmapFromImage (const wxImage &image)=0 |
Creates wxGraphicsBitmap from an existing wxImage. More... | |
virtual wxImage | CreateImageFromBitmap (const wxGraphicsBitmap &bmp)=0 |
Creates a wxImage from a wxGraphicsBitmap. More... | |
virtual wxGraphicsBitmap | CreateBitmapFromNativeBitmap (void *bitmap)=0 |
Creates wxGraphicsBitmap from a native bitmap handle. More... | |
virtual wxGraphicsContext * | CreateContext (wxWindow *window)=0 |
Creates a wxGraphicsContext from a wxWindow. More... | |
virtual wxGraphicsContext * | CreateContext (const wxWindowDC &windowDC)=0 |
Creates a wxGraphicsContext from a wxWindowDC. More... | |
virtual wxGraphicsContext * | CreateContext (const wxMemoryDC &memoryDC)=0 |
Creates a wxGraphicsContext from a wxMemoryDC. More... | |
virtual wxGraphicsContext * | CreateContext (const wxPrinterDC &printerDC)=0 |
Creates a wxGraphicsContext from a wxPrinterDC. More... | |
virtual wxGraphicsContext * | CreateContext (const wxEnhMetaFileDC &metaFileDC)=0 |
Creates a wxGraphicsContext from a wxEnhMetaFileDC. More... | |
wxGraphicsContext * | CreateContextFromImage (wxImage &image) |
Creates a wxGraphicsContext associated with a wxImage. More... | |
virtual wxGraphicsBrush | CreateBrush (const wxBrush &brush)=0 |
Creates a native brush from a wxBrush. More... | |
virtual wxGraphicsContext * | CreateContextFromNativeContext (void *context)=0 |
Creates a wxGraphicsContext from a native context. More... | |
virtual wxGraphicsContext * | CreateContextFromNativeWindow (void *window)=0 |
Creates a wxGraphicsContext from a native window. More... | |
virtual wxGraphicsContext * | CreateMeasuringContext ()=0 |
Creates a wxGraphicsContext that can be used for measuring texts only. More... | |
virtual wxGraphicsFont | CreateFont (const wxFont &font, const wxColour &col=*wxBLACK)=0 |
Creates a native graphics font from a wxFont and a text colour. More... | |
virtual wxGraphicsFont | CreateFont (double sizeInPixels, const wxString &facename, int flags=wxFONTFLAG_DEFAULT, const wxColour &col=*wxBLACK)=0 |
Creates a graphics font with the given characteristics. More... | |
virtual wxGraphicsBrush | CreateLinearGradientBrush (wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxGraphicsGradientStops &stops)=0 |
Creates a native brush with a linear gradient. More... | |
virtual wxGraphicsMatrix | CreateMatrix (wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0, wxDouble tx=0.0, wxDouble ty=0.0)=0 |
Creates a native affine transformation matrix from the passed in values. More... | |
virtual wxGraphicsPath | CreatePath ()=0 |
Creates a native graphics path which is initially empty. More... | |
virtual wxGraphicsPen | CreatePen (const wxPen &pen)=0 |
Creates a native pen from a wxPen. More... | |
virtual wxGraphicsBrush | CreateRadialGradientBrush (wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius, const wxGraphicsGradientStops &stops)=0 |
Creates a native brush with a radial gradient. More... | |
virtual wxGraphicsBitmap | CreateSubBitmap (const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h)=0 |
Extracts a sub-bitmap from an existing bitmap. More... | |
virtual wxString | GetName () const =0 |
Returns the name of the technology used by the renderer. More... | |
virtual void | GetVersion (int *major, int *minor=NULL, int *micro=NULL) const =0 |
Returns the version major, minor and micro/build of the technology used by the renderer. More... | |
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wxObject () | |
Default ctor; initializes to NULL the internal reference data. More... | |
wxObject (const wxObject &other) | |
Copy ctor. More... | |
virtual | ~wxObject () |
Destructor. More... | |
virtual wxClassInfo * | GetClassInfo () const |
This virtual function is redefined for every class that requires run-time type information, when using the wxDECLARE_CLASS macro (or similar). More... | |
wxObjectRefData * | GetRefData () const |
Returns the wxObject::m_refData pointer, i.e. the data referenced by this object. More... | |
bool | IsKindOf (const wxClassInfo *info) const |
Determines whether this class is a subclass of (or the same class as) the given class. More... | |
bool | IsSameAs (const wxObject &obj) const |
Returns true if this object has the same data pointer as obj. More... | |
void | Ref (const wxObject &clone) |
Makes this object refer to the data in clone. More... | |
void | SetRefData (wxObjectRefData *data) |
Sets the wxObject::m_refData pointer. More... | |
void | UnRef () |
Decrements the reference count in the associated data, and if it is zero, deletes the data. More... | |
void | UnShare () |
This is the same of AllocExclusive() but this method is public. More... | |
void | operator delete (void *buf) |
The delete operator is defined for debugging versions of the library only, when the identifier WXDEBUG is defined. More... | |
void * | operator new (size_t size, const wxString &filename=NULL, int lineNum=0) |
The new operator is defined for debugging versions of the library only, when the identifier WXDEBUG is defined. More... | |
Static Public Member Functions | |
static wxGraphicsRenderer * | GetDefaultRenderer () |
Returns the default renderer on this platform. More... | |
static wxGraphicsRenderer * | GetCairoRenderer () |
Additional Inherited Members | |
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void | AllocExclusive () |
Ensure that this object's data is not shared with any other object. More... | |
virtual wxObjectRefData * | CreateRefData () const |
Creates a new instance of the wxObjectRefData-derived class specific to this object and returns it. More... | |
virtual wxObjectRefData * | CloneRefData (const wxObjectRefData *data) const |
Creates a new instance of the wxObjectRefData-derived class specific to this object and initializes it copying data. More... | |
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wxObjectRefData * | m_refData |
Pointer to an object which is the object's reference-counted data. More... | |
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pure virtual |
Creates wxGraphicsBitmap from an existing wxBitmap.
Returns an invalid wxNullGraphicsBitmap on failure.
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pure virtual |
Creates wxGraphicsBitmap from an existing wxImage.
This method is more efficient than converting wxImage to wxBitmap first and then calling CreateBitmap() but otherwise has the same effect.
Returns an invalid wxNullGraphicsBitmap on failure.
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pure virtual |
Creates wxGraphicsBitmap from a native bitmap handle.
bitmap meaning is platform-dependent. Currently it's a GDI+ Bitmap
pointer under MSW, CGImage
pointer under OS X or a cairo_surface_t
pointer when using Cairo under any platform.
Notice that this method takes ownership of bitmap, i.e. it will be destroyed when the returned wxGraphicsBitmap is.
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pure virtual |
Creates a native brush from a wxBrush.
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pure virtual |
Creates a wxGraphicsContext from a wxWindow.
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pure virtual |
Creates a wxGraphicsContext from a wxWindowDC.
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pure virtual |
Creates a wxGraphicsContext from a wxMemoryDC.
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pure virtual |
Creates a wxGraphicsContext from a wxPrinterDC.
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pure virtual |
Creates a wxGraphicsContext from a wxEnhMetaFileDC.
This function, as wxEnhMetaFileDC class itself, is only available only under MSW.
wxGraphicsContext* wxGraphicsRenderer::CreateContextFromImage | ( | wxImage & | image | ) |
Creates a wxGraphicsContext associated with a wxImage.
This function is used by wxContext::CreateFromImage() and is not normally called directly.
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pure virtual |
Creates a wxGraphicsContext from a native context.
This native context must be a CGContextRef for Core Graphics, a Graphics pointer for GDIPlus, or a cairo_t pointer for cairo.
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pure virtual |
Creates a wxGraphicsContext from a native window.
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pure virtual |
Creates a native graphics font from a wxFont and a text colour.
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pure virtual |
Creates a graphics font with the given characteristics.
If possible, the CreateFont() overload taking wxFont should be used instead. The main advantage of this overload is that it can be used without X server connection under Unix when using Cairo.
sizeInPixels | Height of the font in user space units, i.e. normally pixels. Notice that this is different from the overload taking wxFont as wxFont size is specified in points. |
facename | The name of the font. The same font name might not be available under all platforms so the font name can also be empty to use the default platform font. |
flags | Combination of wxFontFlag enum elements. Currently only wxFONTFLAG_ITALIC and wxFONTFLAG_BOLD are supported. By default the normal font version is used. |
col | The font colour, black by default. |
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pure virtual |
Creates a wxImage from a wxGraphicsBitmap.
This method is used by the more convenient wxGraphicsBitmap::ConvertToImage.
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pure virtual |
Creates a native brush with a linear gradient.
Stops support is new since wxWidgets 2.9.1, previously only the start and end colours could be specified.
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pure virtual |
Creates a native affine transformation matrix from the passed in values.
The defaults result in an identity matrix.
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pure virtual |
Creates a wxGraphicsContext that can be used for measuring texts only.
No drawing commands are allowed.
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pure virtual |
Creates a native graphics path which is initially empty.
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pure virtual |
Creates a native pen from a wxPen.
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pure virtual |
Creates a native brush with a radial gradient.
Stops support is new since wxWidgets 2.9.1, previously only the start and end colours could be specified.
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pure virtual |
Extracts a sub-bitmap from an existing bitmap.
Currently this function is implemented in the native MSW and OS X versions but not when using Cairo.
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static |
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static |
Returns the default renderer on this platform.
On OS X this is the Core Graphics (a.k.a. Quartz 2D) renderer, on MSW the GDIPlus renderer, and on GTK we currently default to the cairo renderer.
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pure virtual |
Returns the name of the technology used by the renderer.
Currently this function returns "gdiplus" for Windows GDI+ implementation, "cairo" for Cairo implementation and "cg" for OS X CoreGraphics implementation.
Note: the string returned by this method is not user-readable and is expected to be used internally by the program only.
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pure virtual |
Returns the version major, minor and micro/build of the technology used by the renderer.
Currently this function returns the OS major and minor versions in the parameters with the matching names and sets micro to 0 for the GDI+ and CoreGraphics engines which are considered to be parts of their respective OS.
For Cairo, this is the major,minor,micro version of the Cairo library which is returned.