It is used within wxBitmap and is not normally seen by the application.
If you wish to extend the capabilities of wxBitmap, derive a class from
- wxBitmapHandler and add the handler using wxBitmap::AddHandler in your
+ wxBitmapHandler and add the handler using wxBitmap::AddHandler() in your
application initialisation.
@library{wxcore}
/**
Destroys the wxBitmapHandler object.
*/
- ~wxBitmapHandler();
+ virtual ~wxBitmapHandler();
/**
Creates a bitmap from the given data, which can be of arbitrary type.
A bitmap type identifier - see ::wxBitmapType for a list
of possible values.
- @returns @true if the call succeeded, @false otherwise (the default).
+ @return @true if the call succeeded, @false otherwise (the default).
*/
virtual bool Create(wxBitmap* bitmap, const void* data, wxBitmapType type,
- int width, int height, int depth = wxBITMAP_SCREEN_DEPTH);
+ int width, int height, int depth = 1);
/**
Gets the file extension associated with this handler.
The meaning of name is determined by the type parameter.
@param type
See ::wxBitmapType for values this can take.
+ @param desiredWidth
+ The desired width for the loaded bitmap.
+ @param desiredHeight
+ The desired height for the loaded bitmap.
- @returns @true if the operation succeeded, @false otherwise.
+ @return @true if the operation succeeded, @false otherwise.
@see wxBitmap::LoadFile, wxBitmap::SaveFile, SaveFile()
*/
- bool LoadFile(wxBitmap* bitmap, const wxString& name, wxBitmapType type);
+ virtual bool LoadFile(wxBitmap* bitmap, const wxString& name, wxBitmapType type,
+ int desiredWidth, int desiredHeight);
/**
Saves a bitmap in the named file.
@param palette
An optional palette used for saving the bitmap.
- @returns @true if the operation succeeded, @false otherwise.
+ @return @true if the operation succeeded, @false otherwise.
@see wxBitmap::LoadFile, wxBitmap::SaveFile, LoadFile()
*/
- bool SaveFile(wxBitmap* bitmap, const wxString& name, wxBitmapType type,
- wxPalette* palette = NULL);
+ virtual bool SaveFile(const wxBitmap* bitmap, const wxString& name, wxBitmapType type,
+ const wxPalette* palette = NULL) const;
/**
Sets the handler extension.
This class encapsulates the concept of a platform-dependent bitmap,
either monochrome or colour or colour with alpha channel support.
+
+ If you need direct access the bitmap data instead going through
+ drawing to it using wxMemoryDC you need to use the wxPixelData
+ class (either wxNativePixelData for RGB bitmaps or wxAlphaPixelData
+ for bitmaps with an additionaly alpha channel).
@note
Many wxBitmap functions take a @e type parameter, which is a value of the
::wxNullBitmap
@see @ref overview_bitmap, @ref overview_bitmap_supportedformats,
- wxDC::Blit, wxIcon, wxCursor, wxBitmap, wxMemoryDC
+ wxDC::Blit, wxIcon, wxCursor, wxMemoryDC, wxImage, wxPixelData
*/
class wxBitmap : public wxGDIObject
{
wxBitmap(const void* data, int type, int width, int height, int depth = -1);
- NOTE: this ctor is not implemented by all port, is somewhat useless
+ NOTE: this ctor is not implemented by all ports, is somewhat useless
without further description of the "data" supported formats and
uses 'int type' instead of wxBitmapType, so don't document it.
*/
/**
Creates a new bitmap. A depth of ::wxBITMAP_SCREEN_DEPTH indicates the
depth of the current screen or visual.
+
Some platforms only support 1 for monochrome and ::wxBITMAP_SCREEN_DEPTH for
the current colour setting.
@warning
Do not delete a bitmap that is selected into a memory device context.
*/
- ~wxBitmap();
+ virtual ~wxBitmap();
/**
Adds a handler to the end of the static list of format handlers.
mask information so that bitmaps and images can be converted back
and forth without loss in that respect.
*/
- wxImage ConvertToImage();
+ virtual wxImage ConvertToImage() const;
/**
Creates the bitmap from an icon.
*/
- bool CopyFromIcon(const wxIcon& icon);
+ virtual bool CopyFromIcon(const wxIcon& icon);
/**
Creates a fresh bitmap.
@param depth
The depth of the bitmap in pixels. If this is -1, the screen depth is used.
- @returns @true if the call succeeded, @false otherwise.
+ @return @true if the call succeeded, @false otherwise.
This overload depends on the @a type of data.
/**
Finds the handler with the given @a name.
- @returns A pointer to the handler if found, @NULL otherwise.
+ @return A pointer to the handler if found, @NULL otherwise.
*/
static wxBitmapHandler* FindHandler(const wxString& name);
@param bitmapType
The bitmap type managed by the handler, see ::wxBitmapType.
- @returns A pointer to the handler if found, @NULL otherwise.
+ @return A pointer to the handler if found, @NULL otherwise.
*/
static wxBitmapHandler* FindHandler(const wxString& extension,
wxBitmapType bitmapType);
@param bitmapType
The bitmap type managed by the handler, see ::wxBitmapType.
- @returns A pointer to the handler if found, @NULL otherwise.
+ @return A pointer to the handler if found, @NULL otherwise.
@see wxBitmapHandler
*/
Gets the colour depth of the bitmap.
A value of 1 indicates a monochrome bitmap.
*/
- int GetDepth() const;
+ virtual int GetDepth() const;
/**
Returns the static list of bitmap format handlers.
/**
Gets the height of the bitmap in pixels.
*/
- int GetHeight() const;
+ virtual int GetHeight() const;
/**
Gets the associated mask (if any) which may have been loaded from a file
@see SetMask(), wxMask
*/
- wxMask* GetMask() const;
+ virtual wxMask* GetMask() const;
/**
Gets the associated palette (if any) which may have been loaded from a file
@see wxPalette
*/
- wxPalette* GetPalette() const;
+ virtual wxPalette* GetPalette() const;
/**
Returns a sub bitmap of the current one as long as the rect belongs entirely to
the bitmap. This function preserves bit depth and mask information.
*/
- wxBitmap GetSubBitmap(const wxRect& rect) const;
+ virtual wxBitmap GetSubBitmap(const wxRect& rect) const;
/**
Gets the width of the bitmap in pixels.
@see GetHeight()
*/
- int GetWidth() const;
+ virtual int GetWidth() const;
/**
Adds the standard bitmap format handlers, which, depending on wxWidgets
One of the ::wxBitmapType values; see the note in the class
detailed description.
- @returns @true if the operation succeeded, @false otherwise.
+ @return @true if the operation succeeded, @false otherwise.
@remarks A palette may be associated with the bitmap if one exists
(especially for colour Windows bitmaps), and if the
@see SaveFile()
*/
- bool LoadFile(const wxString& name, wxBitmapType type);
+ virtual bool LoadFile(const wxString& name, wxBitmapType type);
/**
Finds the handler with the given name, and removes it.
@param name
The handler name.
- @returns @true if the handler was found and removed, @false otherwise.
+ @return @true if the handler was found and removed, @false otherwise.
@see wxBitmapHandler
*/
@param palette
An optional palette used for saving the bitmap.
- @returns @true if the operation succeeded, @false otherwise.
+ @return @true if the operation succeeded, @false otherwise.
@remarks Depending on how wxWidgets has been configured, not all formats
may be available.
@see LoadFile()
*/
- bool SaveFile(const wxString& name, wxBitmapType type,
- const wxPalette* palette = NULL);
+ virtual bool SaveFile(const wxString& name, wxBitmapType type,
+ const wxPalette* palette = NULL) const;
/**
Sets the depth member (does not affect the bitmap data).
@param depth
Bitmap depth.
*/
- void SetDepth(int depth);
+ virtual void SetDepth(int depth);
/**
Sets the height member (does not affect the bitmap data).
@param height
Bitmap height in pixels.
*/
- void SetHeight(int height);
+ virtual void SetHeight(int height);
/**
Sets the mask for this bitmap.
@see GetMask(), wxMask
*/
- void SetMask(wxMask* mask);
+ virtual void SetMask(wxMask* mask);
/**
Sets the associated palette. (Not implemented under GTK+).
@see wxPalette
*/
- void SetPalette(const wxPalette& palette);
+ virtual void SetPalette(const wxPalette& palette);
/**
Sets the width member (does not affect the bitmap data).
@param width
Bitmap width in pixels.
*/
- void SetWidth(int width);
-
- /**
- Assignment operator, using @ref overview_refcount "reference counting".
-
- @param bitmap
- Bitmap to assign.
- */
- wxBitmap operator =(const wxBitmap& bitmap);
+ virtual void SetWidth(int width);
};
/**
/**
Destroys the wxMask object and the underlying bitmap data.
*/
- ~wxMask();
+ virtual ~wxMask();
/**
Constructs a mask from a bitmap and a palette index that indicates the
projects / wxWidgets.git / blobdiff