Represents a bitmap.
The objects of this class are not created directly but only via
- wxGraphicsContext or wxGraphicsRenderer CreateBitmap() and
- CreateSubBitmap() methods. They can subsequently be used with
- wxGraphicsContext::DrawBitmap(). The only other operation is testing for
- the bitmap validity which can be performed using IsNull() method inherited
- from the base class.
+ wxGraphicsContext or wxGraphicsRenderer CreateBitmap(),
+ CreateBitmapFromImage() or CreateSubBitmap() methods. They can subsequently
+ be used with wxGraphicsContext::DrawBitmap(). The only other operation is
+ testing for the bitmap validity which can be performed using IsNull()
+ method inherited from the base class.
*/
class wxGraphicsBitmap : public wxGraphicsObject
{
Default constructor creates an invalid bitmap.
*/
wxGraphicsBitmap() {}
+
+ /**
+ Return the contents of this bitmap as wxImage.
+
+ Using this method is more efficient than converting wxGraphicsBitmap to
+ wxBitmap first and then to wxImage and can be useful if, for example,
+ you want to save wxGraphicsBitmap as a disk file in a format not
+ directly supported by wxBitmap.
+
+ Invalid image is returned if the bitmap is invalid.
+
+ @since 2.9.3
+ */
+ wxImage ConvertToImage() const;
+
+ /**
+ Return the pointer to the native bitmap data. (CGImageRef for Core Graphics,
+ cairo_surface_t for Cairo, Bitmap* for GDI+.)
+
+ @since 2.9.4
+ */
+ void* GetNativeBitmap() const;
};
/**
@see wxGraphicsRenderer::CreateContext()
*/
- static wxGraphicsContext* Create(const wxWindowDC& dc);
+ static wxGraphicsContext* Create(const wxWindowDC& windowDC);
/**
Creates a wxGraphicsContext from a wxMemoryDC
@see wxGraphicsRenderer::CreateContext()
*/
- static wxGraphicsContext* Create(const wxMemoryDC& dc);
+ static wxGraphicsContext* Create(const wxMemoryDC& memoryDC);
/**
Creates a wxGraphicsContext from a wxPrinterDC. Under GTK+, this will
@see wxGraphicsRenderer::CreateContext(), @ref overview_unixprinting
*/
- static wxGraphicsContext* Create(const wxPrinterDC& dc);
+ static wxGraphicsContext* Create(const wxPrinterDC& printerDC);
/**
Creates a wxGraphicsContext from a wxEnhMetaFileDC.
@see wxGraphicsRenderer::CreateContext()
*/
- static wxGraphicsContext* Create(const wxEnhMetaFileDC& dc);
+ static wxGraphicsContext* Create(const wxEnhMetaFileDC& metaFileDC);
+
+ /**
+ Creates a wxGraphicsContext associated with a wxImage.
+
+ The image specifies the size of the context as well as whether alpha is
+ supported (if wxImage::HasAlpha()) or not and the initial contents of
+ the context. The @a image object must have a life time greater than
+ that of the new context as the context copies its contents back to the
+ image when it is destroyed.
+
+ @since 2.9.3
+ */
+ static wxGraphicsContext* Create(wxImage& image);
/**
Clips drawings to the specified region.
*/
virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap ) = 0;
+ /**
+ 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.
+
+ @since 2.9.3
+ */
+ virtual wxGraphicsBitmap CreateBitmapFromImage(const wxImage& image);
+
/**
Extracts a sub-bitmap from an existing bitmap.
virtual wxGraphicsFont CreateFont(const wxFont& font,
const wxColour& col = *wxBLACK) const;
+ /**
+ Creates a font object with the specified attributes.
+
+ The use of overload taking wxFont is preferred, see
+ wxGraphicsRenderer::CreateFont() for more details.
+
+ @since 2.9.3
+ */
+ virtual wxGraphicsFont CreateFont(double sizeInPixels,
+ const wxString& facename,
+ int flags = wxFONTFLAG_DEFAULT,
+ const wxColour& col = *wxBLACK) const;
+
/**
Creates a wxGraphicsContext from a native context. This native context
must be a CGContextRef for Core Graphics, a Graphics pointer for
wxDouble tx = 0.0,
wxDouble ty = 0.0) const;
+ /**
+ Creates a native affine transformation matrix from the passed
+ generic one.
+
+ @since 2.9.4
+ */
+ wxGraphicsMatrix CreateMatrix(const wxAffineMatrix2DBase& mat) const;
+
/**
Creates a native graphics path which is initially empty.
*/
virtual wxAntialiasMode GetAntialiasMode() const ;
/**
- Sets the interpolation quality, returns true if it supported
+ Sets the interpolation quality, returns true if it is supported.
+
+ Not implemented in Cairo backend currently.
*/
virtual bool SetInterpolationQuality(wxInterpolationQuality interpolation) = 0;
-
+
/**
- Returns the current interpolation quality
+ Returns the current interpolation quality.
*/
virtual wxInterpolationQuality GetInterpolationQuality() const;
-
+
/**
Sets the compositing operator, returns true if it supported
*/
*/
virtual wxCompositionMode GetCompositionMode() const;
+
+ /**
+ Push the current state of the context's transformation matrix on a
+ stack.
+
+ @see wxGraphicsContext::PopState
+ */
+ virtual void PushState() = 0;
+
+ /**
+ Pops a stored state from the stack and sets the current transformation
+ matrix to that state.
+
+ @see wxGraphicsContext::PopState
+ */
+ virtual void PopState() = 0;
+
+
+ virtual void EnableOffset(bool enable = true);
+ void DisableOffset();
+ bool OffsetEnabled();
+
};
/**
*/
virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap ) = 0;
+ /**
+ 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.
+
+ @since 2.9.3
+ */
+ virtual wxGraphicsBitmap CreateBitmapFromImage(const wxImage& image) = 0;
+
+ /**
+ Creates a wxImage from a wxGraphicsBitmap.
+
+ This method is used by the more convenient wxGraphicsBitmap::ConvertToImage.
+ */
+ virtual wxImage CreateImageFromBitmap(const wxGraphicsBitmap& bmp) = 0;
+
/**
Creates wxGraphicsBitmap from a native bitmap handle.
/**
Creates a wxGraphicsContext from a wxWindowDC
*/
- virtual wxGraphicsContext* CreateContext(const wxWindowDC& dc) = 0 ;
+ virtual wxGraphicsContext* CreateContext(const wxWindowDC& windowDC) = 0 ;
/**
Creates a wxGraphicsContext from a wxMemoryDC
*/
- virtual wxGraphicsContext* CreateContext(const wxMemoryDC& dc) = 0 ;
+ virtual wxGraphicsContext* CreateContext(const wxMemoryDC& memoryDC) = 0 ;
/**
Creates a wxGraphicsContext from a wxPrinterDC
*/
- virtual wxGraphicsContext* CreateContext(const wxPrinterDC& dc) = 0 ;
+ virtual wxGraphicsContext* CreateContext(const wxPrinterDC& printerDC) = 0 ;
/**
Creates a wxGraphicsContext from a wxEnhMetaFileDC.
This function, as wxEnhMetaFileDC class itself, is only available only
under MSW.
*/
- virtual wxGraphicsContext* CreateContext(const wxEnhMetaFileDC& dc) = 0;
+ virtual wxGraphicsContext* CreateContext(const wxEnhMetaFileDC& metaFileDC) = 0;
+
+ /**
+ Creates a wxGraphicsContext associated with a wxImage.
+
+ This function is used by wxContext::CreateFromImage() and is not
+ normally called directly.
+
+ @since 2.9.3
+ */
+ wxGraphicsContext* CreateContextFromImage(wxImage& image);
/**
Creates a native brush from a wxBrush.
virtual wxGraphicsFont CreateFont(const wxFont& font,
const wxColour& col = *wxBLACK) = 0;
+ /**
+ 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.
+
+ @param 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.
+ @param 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.
+ @param flags
+ Combination of wxFontFlag enum elements. Currently only
+ @c wxFONTFLAG_ITALIC and @c wxFONTFLAG_BOLD are supported. By
+ default the normal font version is used.
+ @param col
+ The font colour, black by default.
+
+ @since 2.9.3
+ */
+ virtual wxGraphicsFont CreateFont(double sizeInPixels,
+ const wxString& facename,
+ int flags = wxFONTFLAG_DEFAULT,
+ const wxColour& col = *wxBLACK) = 0;
+
/**
Creates a native brush with a linear gradient.
on GTK we currently default to the cairo renderer.
*/
static wxGraphicsRenderer* GetDefaultRenderer();
+ static wxGraphicsRenderer* GetCairoRenderer();
+
};
virtual bool IsIdentity() const;
/**
- Rotates this matrix (in radians).
+ Rotates this matrix clockwise (in radians).
+
+ @param radians
+ Rotation angle in radians, clockwise.
*/
virtual void Rotate(wxDouble angle);
virtual void Translate(wxDouble dx, wxDouble dy);
};
+
+const wxGraphicsPen wxNullGraphicsPen;
+const wxGraphicsBrush wxNullGraphicsBrush;
+const wxGraphicsFont wxNullGraphicsFont;
+const wxGraphicsBitmap wxNullGraphicsBitmap;
+const wxGraphicsMatrix wxNullGraphicsMatrix;
+const wxGraphicsPath wxNullGraphicsPath;
projects / wxWidgets.git / blobdiff