ac04aa9943
This method was defined in wxBitmapBase which is not used by wxMSW (and wxOS2) so it wasn't available there. Move the definition of the method inline and reuse it for all ports, making it part of either wxBitmapBase or wxBitmap as appropriate. This is clearly ugly but we still have no good solution for deriving wxBitmap from wxBitmapBase in wxMSW as it already inherits from MSW-specific wxGDIImage there. Also document that ConvertToDisabled() is only available when wxUSE_IMAGE==1. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66086 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
746 lines
23 KiB
Objective-C
746 lines
23 KiB
Objective-C
/////////////////////////////////////////////////////////////////////////////
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// Name: bitmap.h
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// Purpose: interface of wxBitmap* classes
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// Author: wxWidgets team
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// RCS-ID: $Id$
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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/**
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In wxBitmap and wxBitmapHandler context this value means: "use the screen depth".
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*/
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#define wxBITMAP_SCREEN_DEPTH (-1)
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/**
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@class wxBitmapHandler
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This is the base class for implementing bitmap file loading/saving, and
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bitmap creation from data.
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It is used within wxBitmap and is not normally seen by the application.
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If you wish to extend the capabilities of wxBitmap, derive a class from
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wxBitmapHandler and add the handler using wxBitmap::AddHandler() in your
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application initialization.
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Note that all wxBitmapHandlers provided by wxWidgets are part of the
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@ref page_libs_wxcore library.
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For details about the default handlers, please see the note in the
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wxBitmap class documentation.
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@library{wxcore}
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@category{gdi}
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@see @ref overview_bitmap, wxBitmap, wxIcon, wxCursor
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*/
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class wxBitmapHandler : public wxObject
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{
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public:
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/**
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Default constructor.
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In your own default constructor, initialise the members m_name,
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m_extension and m_type.
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*/
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wxBitmapHandler();
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/**
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Destroys the wxBitmapHandler object.
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*/
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virtual ~wxBitmapHandler();
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/**
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Creates a bitmap from the given data, which can be of arbitrary type.
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The wxBitmap object @a bitmap is manipulated by this function.
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@param bitmap
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The wxBitmap object.
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@param width
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The width of the bitmap in pixels.
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@param height
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The height of the bitmap in pixels.
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@param depth
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The depth of the bitmap in pixels.
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If this is ::wxBITMAP_SCREEN_DEPTH, the screen depth is used.
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@param data
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Data whose type depends on the value of type.
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@param type
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A bitmap type identifier - see ::wxBitmapType for a list
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of possible values.
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@return @true if the call succeeded, @false otherwise (the default).
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*/
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virtual bool Create(wxBitmap* bitmap, const void* data, wxBitmapType type,
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int width, int height, int depth = 1);
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/**
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Gets the file extension associated with this handler.
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*/
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const wxString& GetExtension() const;
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/**
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Gets the name of this handler.
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*/
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const wxString& GetName() const;
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/**
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Gets the bitmap type associated with this handler.
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*/
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wxBitmapType GetType() const;
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/**
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Loads a bitmap from a file or resource, putting the resulting data into
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@a bitmap.
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@param bitmap
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The bitmap object which is to be affected by this operation.
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@param name
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Either a filename or a Windows resource name.
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The meaning of name is determined by the type parameter.
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@param type
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See ::wxBitmapType for values this can take.
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@param desiredWidth
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The desired width for the loaded bitmap.
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@param desiredHeight
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The desired height for the loaded bitmap.
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@return @true if the operation succeeded, @false otherwise.
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@see wxBitmap::LoadFile, wxBitmap::SaveFile, SaveFile()
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*/
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virtual bool LoadFile(wxBitmap* bitmap, const wxString& name, wxBitmapType type,
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int desiredWidth, int desiredHeight);
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/**
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Saves a bitmap in the named file.
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@param bitmap
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The bitmap object which is to be affected by this operation.
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@param name
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A filename. The meaning of name is determined by the type parameter.
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@param type
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See ::wxBitmapType for values this can take.
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@param palette
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An optional palette used for saving the bitmap.
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@return @true if the operation succeeded, @false otherwise.
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@see wxBitmap::LoadFile, wxBitmap::SaveFile, LoadFile()
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*/
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virtual bool SaveFile(const wxBitmap* bitmap, const wxString& name, wxBitmapType type,
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const wxPalette* palette = NULL) const;
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/**
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Sets the handler extension.
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@param extension
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Handler extension.
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*/
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void SetExtension(const wxString& extension);
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/**
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Sets the handler name.
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@param name
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Handler name.
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*/
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void SetName(const wxString& name);
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/**
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Sets the handler type.
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@param type
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Handler type.
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*/
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void SetType(wxBitmapType type);
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};
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/**
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@class wxBitmap
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This class encapsulates the concept of a platform-dependent bitmap,
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either monochrome or colour or colour with alpha channel support.
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If you need direct access the bitmap data instead going through
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drawing to it using wxMemoryDC you need to use the wxPixelData
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class (either wxNativePixelData for RGB bitmaps or wxAlphaPixelData
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for bitmaps with an additionaly alpha channel).
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Note that many wxBitmap functions take a @e type parameter, which is a
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value of the ::wxBitmapType enumeration.
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The validity of those values depends however on the platform where your program
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is running and from the wxWidgets configuration.
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If all possible wxWidgets settings are used:
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- wxMSW supports BMP and ICO files, BMP and ICO resources;
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- wxGTK supports XPM files;
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- wxMac supports PICT resources;
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- wxX11 supports XPM files, XPM data, XBM data;
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In addition, wxBitmap can load and save all formats that wxImage can; see wxImage
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for more info. Of course, you must have loaded the wxImage handlers
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(see ::wxInitAllImageHandlers() and wxImage::AddHandler).
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Note that all available wxBitmapHandlers for a given wxWidgets port are
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automatically loaded at startup so you won't need to use wxBitmap::AddHandler.
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@library{wxcore}
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@category{gdi}
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@stdobjects
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::wxNullBitmap
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@see @ref overview_bitmap, @ref overview_bitmap_supportedformats,
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wxDC::Blit, wxIcon, wxCursor, wxMemoryDC, wxImage, wxPixelData
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*/
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class wxBitmap : public wxGDIObject
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{
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public:
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/**
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Default constructor.
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Constructs a bitmap object with no data; an assignment or another member
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function such as Create() or LoadFile() must be called subsequently.
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*/
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wxBitmap();
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/**
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Copy constructor, uses @ref overview_refcount "reference counting".
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To make a real copy, you can use:
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@code
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wxBitmap newBitmap = oldBitmap.GetSubBitmap(
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wxRect(0, 0, oldBitmap.GetWidth(), oldBitmap.GetHeight()));
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@endcode
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*/
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wxBitmap(const wxBitmap& bitmap);
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/*
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Creates a bitmap from the given @a data which is interpreted in
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platform-dependent manner.
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@param data
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Specifies the bitmap data in a platform-dependent format.
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@param type
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May be one of the ::wxBitmapType values and indicates which type of
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bitmap does @a data contains. See the note in the class
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detailed description.
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@param width
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Specifies the width of the bitmap.
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@param height
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Specifies the height of the bitmap.
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@param depth
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Specifies the depth of the bitmap.
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If this is omitted, the display depth of the screen is used.
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wxBitmap(const void* data, int type, int width, int height, int depth = -1);
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NOTE: this ctor is not implemented by all ports, is somewhat useless
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without further description of the "data" supported formats and
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uses 'int type' instead of wxBitmapType, so don't document it.
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*/
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/**
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Creates a bitmap from the given array @a bits.
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You should only use this function for monochrome bitmaps (depth 1) in
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portable programs: in this case the bits parameter should contain an XBM image.
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For other bit depths, the behaviour is platform dependent: under Windows,
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the data is passed without any changes to the underlying CreateBitmap() API.
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Under other platforms, only monochrome bitmaps may be created using this
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constructor and wxImage should be used for creating colour bitmaps from
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static data.
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@param bits
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Specifies an array of pixel values.
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@param width
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Specifies the width of the bitmap.
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@param height
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Specifies the height of the bitmap.
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@param depth
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Specifies the depth of the bitmap.
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If this is omitted, then a value of 1 (monochrome bitmap) is used.
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@beginWxPerlOnly
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In wxPerl use Wx::Bitmap->newFromBits(bits, width, height, depth).
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@endWxPerlOnly
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*/
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wxBitmap(const char bits[], int width, int height, int depth = 1);
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/**
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Creates a new bitmap. A depth of ::wxBITMAP_SCREEN_DEPTH indicates the
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depth of the current screen or visual.
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Some platforms only support 1 for monochrome and ::wxBITMAP_SCREEN_DEPTH for
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the current colour setting.
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A depth of 32 including an alpha channel is supported under MSW, Mac and GTK+.
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*/
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wxBitmap(int width, int height, int depth = wxBITMAP_SCREEN_DEPTH);
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/**
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@overload
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*/
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wxBitmap(const wxSize& sz, int depth = wxBITMAP_SCREEN_DEPTH);
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/**
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Creates a bitmap from XPM data.
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@beginWxPerlOnly
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In wxPerl use Wx::Bitmap->newFromXPM(data).
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@endWxPerlOnly
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*/
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wxBitmap(const char* const* bits);
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/**
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Loads a bitmap from a file or resource.
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@param name
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This can refer to a resource name or a filename under MS Windows and X.
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Its meaning is determined by the @a type parameter.
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@param type
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May be one of the ::wxBitmapType values and indicates which type of
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bitmap should be loaded. See the note in the class detailed description.
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Note that the wxBITMAP_DEFAULT_TYPE constant has different value under
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different wxWidgets ports. See the bitmap.h header for the value it takes
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for a specific port.
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@see LoadFile()
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*/
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wxBitmap(const wxString& name, wxBitmapType type = wxBITMAP_DEFAULT_TYPE);
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/**
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Creates this bitmap object from the given image.
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This has to be done to actually display an image as you cannot draw an
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image directly on a window.
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The resulting bitmap will use the provided colour depth (or that of the
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current system if depth is ::wxBITMAP_SCREEN_DEPTH) which entails that a
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colour reduction may take place.
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When in 8-bit mode (PseudoColour mode), the GTK port will use a color cube
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created on program start-up to look up colors. This ensures a very fast conversion,
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but the image quality won't be perfect (and could be better for photo images using
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more sophisticated dithering algorithms).
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On Windows, if there is a palette present (set with SetPalette), it will be
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used when creating the wxBitmap (most useful in 8-bit display mode).
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On other platforms, the palette is currently ignored.
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@param img
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Platform-independent wxImage object.
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@param depth
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Specifies the depth of the bitmap.
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If this is omitted, the display depth of the screen is used.
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*/
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wxBitmap(const wxImage& img, int depth = wxBITMAP_SCREEN_DEPTH);
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/**
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Destructor.
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See @ref overview_refcount_destruct for more info.
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If the application omits to delete the bitmap explicitly, the bitmap will be
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destroyed automatically by wxWidgets when the application exits.
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@warning
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Do not delete a bitmap that is selected into a memory device context.
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*/
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virtual ~wxBitmap();
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/**
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Adds a handler to the end of the static list of format handlers.
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@param handler
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A new bitmap format handler object. There is usually only one instance
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of a given handler class in an application session.
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Note that unlike wxImage::AddHandler, there's no documented list of
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the wxBitmapHandlers available in wxWidgets.
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This is because they are platform-specific and most important, they are
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all automatically loaded at startup.
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If you want to be sure that wxBitmap can load a certain type of image,
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you'd better use wxImage::AddHandler.
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@see wxBitmapHandler
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*/
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static void AddHandler(wxBitmapHandler* handler);
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/**
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Deletes all bitmap handlers.
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This function is called by wxWidgets on exit.
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*/
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static void CleanUpHandlers();
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/**
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Creates an image from a platform-dependent bitmap. This preserves
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mask information so that bitmaps and images can be converted back
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and forth without loss in that respect.
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*/
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virtual wxImage ConvertToImage() const;
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/**
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Creates the bitmap from an icon.
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*/
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virtual bool CopyFromIcon(const wxIcon& icon);
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/**
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Creates a fresh bitmap.
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If the final argument is omitted, the display depth of the screen is used.
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@return @true if the creation was successful.
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*/
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virtual bool Create(int width, int height, int depth = wxBITMAP_SCREEN_DEPTH);
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/**
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@overload
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*/
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virtual bool Create(const wxSize& sz, int depth = wxBITMAP_SCREEN_DEPTH);
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/*
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Creates a bitmap from the given data, which can be of arbitrary type.
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@param data
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Data whose type depends on the value of type.
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@param type
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A bitmap type identifier; see ::wxBitmapType for the list of values.
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See the note in the class detailed description for more info.
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@param width
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The width of the bitmap in pixels.
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@param height
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The height of the bitmap in pixels.
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@param depth
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The depth of the bitmap in pixels. If this is -1, the screen depth is used.
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@return @true if the call succeeded, @false otherwise.
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This overload depends on the @a type of data.
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virtual bool Create(const void* data, int type, int width,
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int height, int depth = -1);
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NOTE: leave this undoc for the same reason of the relative ctor.
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*/
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/**
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Finds the handler with the given @a name.
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@return A pointer to the handler if found, @NULL otherwise.
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*/
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static wxBitmapHandler* FindHandler(const wxString& name);
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/**
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Finds the handler associated with the given @a extension and @a type.
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@param extension
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The file extension, such as "bmp" (without the dot).
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@param bitmapType
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The bitmap type managed by the handler, see ::wxBitmapType.
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@return A pointer to the handler if found, @NULL otherwise.
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*/
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static wxBitmapHandler* FindHandler(const wxString& extension,
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wxBitmapType bitmapType);
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/**
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Finds the handler associated with the given bitmap type.
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@param bitmapType
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The bitmap type managed by the handler, see ::wxBitmapType.
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@return A pointer to the handler if found, @NULL otherwise.
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@see wxBitmapHandler
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*/
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static wxBitmapHandler* FindHandler(wxBitmapType bitmapType);
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/**
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Gets the colour depth of the bitmap.
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A value of 1 indicates a monochrome bitmap.
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*/
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virtual int GetDepth() const;
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/**
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Returns the static list of bitmap format handlers.
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@see wxBitmapHandler
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*/
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static wxList& GetHandlers();
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/**
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Gets the height of the bitmap in pixels.
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@see GetWidth(), GetSize()
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*/
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virtual int GetHeight() const;
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/**
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Gets the associated mask (if any) which may have been loaded from a file
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or set for the bitmap.
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@see SetMask(), wxMask
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*/
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virtual wxMask* GetMask() const;
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/**
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Gets the associated palette (if any) which may have been loaded from a file
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or set for the bitmap.
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@see wxPalette
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*/
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virtual wxPalette* GetPalette() const;
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/**
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Returns a sub bitmap of the current one as long as the rect belongs entirely to
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the bitmap. This function preserves bit depth and mask information.
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*/
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virtual wxBitmap GetSubBitmap(const wxRect& rect) const;
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/**
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Returns the size of the bitmap in pixels.
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@since 2.9.0
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@see GetHeight(), GetWidth()
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*/
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wxSize GetSize() const;
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/**
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Returns disabled (dimmed) version of the bitmap.
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This method is not available when <code>wxUSE_IMAGE == 0</code>.
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@since 2.9.0
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*/
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wxBitmap ConvertToDisabled(unsigned char brightness = 255) const;
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/**
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Gets the width of the bitmap in pixels.
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@see GetHeight(), GetSize()
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*/
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virtual int GetWidth() const;
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/**
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Adds the standard bitmap format handlers, which, depending on wxWidgets
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configuration, can be handlers for Windows bitmap, Windows bitmap resource,
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and XPM.
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This function is called by wxWidgets on startup.
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@see wxBitmapHandler
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*/
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static void InitStandardHandlers();
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/**
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|
Adds a handler at the start of the static list of format handlers.
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|
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@param handler
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A new bitmap format handler object. There is usually only one instance
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of a given handler class in an application session.
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|
|
@see wxBitmapHandler
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*/
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static void InsertHandler(wxBitmapHandler* handler);
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/**
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Returns @true if bitmap data is present.
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*/
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virtual bool IsOk() const;
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|
|
/**
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|
Loads a bitmap from a file or resource.
|
|
|
|
@param name
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|
Either a filename or a Windows resource name.
|
|
The meaning of name is determined by the @a type parameter.
|
|
@param type
|
|
One of the ::wxBitmapType values; see the note in the class
|
|
detailed description.
|
|
Note that the wxBITMAP_DEFAULT_TYPE constant has different value under
|
|
different wxWidgets ports. See the bitmap.h header for the value it takes
|
|
for a specific port.
|
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|
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@return @true if the operation succeeded, @false otherwise.
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|
|
@remarks A palette may be associated with the bitmap if one exists
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(especially for colour Windows bitmaps), and if the
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code supports it. You can check if one has been created
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|
by using the GetPalette() member.
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|
|
@see SaveFile()
|
|
*/
|
|
virtual bool LoadFile(const wxString& name, wxBitmapType type = wxBITMAP_DEFAULT_TYPE);
|
|
|
|
/**
|
|
Finds the handler with the given name, and removes it.
|
|
The handler is not deleted.
|
|
|
|
@param name
|
|
The handler name.
|
|
|
|
@return @true if the handler was found and removed, @false otherwise.
|
|
|
|
@see wxBitmapHandler
|
|
*/
|
|
static bool RemoveHandler(const wxString& name);
|
|
|
|
/**
|
|
Saves a bitmap in the named file.
|
|
|
|
@param name
|
|
A filename. The meaning of name is determined by the type parameter.
|
|
@param type
|
|
One of the ::wxBitmapType values; see the note in the class
|
|
detailed description.
|
|
@param palette
|
|
An optional palette used for saving the bitmap.
|
|
|
|
@return @true if the operation succeeded, @false otherwise.
|
|
|
|
@remarks Depending on how wxWidgets has been configured, not all formats
|
|
may be available.
|
|
|
|
@see LoadFile()
|
|
*/
|
|
virtual bool SaveFile(const wxString& name, wxBitmapType type,
|
|
const wxPalette* palette = NULL) const;
|
|
|
|
/**
|
|
Sets the depth member (does not affect the bitmap data).
|
|
|
|
@todo since these functions do not affect the bitmap data,
|
|
why they exist??
|
|
|
|
@param depth
|
|
Bitmap depth.
|
|
*/
|
|
virtual void SetDepth(int depth);
|
|
|
|
/**
|
|
Sets the height member (does not affect the bitmap data).
|
|
|
|
@param height
|
|
Bitmap height in pixels.
|
|
*/
|
|
virtual void SetHeight(int height);
|
|
|
|
/**
|
|
Sets the mask for this bitmap.
|
|
|
|
@remarks The bitmap object owns the mask once this has been called.
|
|
|
|
@see GetMask(), wxMask
|
|
*/
|
|
virtual void SetMask(wxMask* mask);
|
|
|
|
/**
|
|
Sets the associated palette. (Not implemented under GTK+).
|
|
|
|
@param palette
|
|
The palette to set.
|
|
|
|
@see wxPalette
|
|
*/
|
|
virtual void SetPalette(const wxPalette& palette);
|
|
|
|
/**
|
|
Sets the width member (does not affect the bitmap data).
|
|
|
|
@param width
|
|
Bitmap width in pixels.
|
|
*/
|
|
virtual void SetWidth(int width);
|
|
};
|
|
|
|
/**
|
|
An empty wxBitmap object.
|
|
*/
|
|
wxBitmap wxNullBitmap;
|
|
|
|
|
|
|
|
|
|
/**
|
|
@class wxMask
|
|
|
|
This class encapsulates a monochrome mask bitmap, where the masked area is
|
|
black and the unmasked area is white.
|
|
|
|
When associated with a bitmap and drawn in a device context, the unmasked
|
|
area of the bitmap will be drawn, and the masked area will not be drawn.
|
|
|
|
@library{wxcore}
|
|
@category{gdi}
|
|
|
|
@see wxBitmap, wxDC::Blit, wxMemoryDC
|
|
*/
|
|
class wxMask : public wxObject
|
|
{
|
|
public:
|
|
|
|
/**
|
|
Default constructor.
|
|
*/
|
|
wxMask();
|
|
|
|
/**
|
|
Constructs a mask from a bitmap and a palette index that indicates the
|
|
background.
|
|
Not yet implemented for GTK.
|
|
|
|
@param bitmap
|
|
A valid bitmap.
|
|
@param index
|
|
Index into a palette, specifying the transparency colour.
|
|
*/
|
|
wxMask(const wxBitmap& bitmap, int index);
|
|
|
|
/**
|
|
Constructs a mask from a monochrome bitmap.
|
|
|
|
@beginWxPythonOnly
|
|
This is the default constructor for wxMask in wxPython.
|
|
@endWxPythonOnly
|
|
*/
|
|
wxMask(const wxBitmap& bitmap);
|
|
|
|
/**
|
|
Constructs a mask from a bitmap and a colour that indicates the background.
|
|
|
|
@beginWxPythonOnly
|
|
wxPython has an alternate wxMask constructor matching this form called wxMaskColour.
|
|
@endWxPythonOnly
|
|
*/
|
|
wxMask(const wxBitmap& bitmap, const wxColour& colour);
|
|
|
|
/**
|
|
Destroys the wxMask object and the underlying bitmap data.
|
|
*/
|
|
virtual ~wxMask();
|
|
|
|
/**
|
|
Constructs a mask from a bitmap and a palette index that indicates the
|
|
background.
|
|
Not yet implemented for GTK.
|
|
|
|
@param bitmap
|
|
A valid bitmap.
|
|
@param index
|
|
Index into a palette, specifying the transparency colour.
|
|
*/
|
|
bool Create(const wxBitmap& bitmap, int index);
|
|
|
|
/**
|
|
Constructs a mask from a monochrome bitmap.
|
|
*/
|
|
bool Create(const wxBitmap& bitmap);
|
|
|
|
/**
|
|
Constructs a mask from a bitmap and a colour that indicates the background.
|
|
*/
|
|
bool Create(const wxBitmap& bitmap, const wxColour& colour);
|
|
};
|
|
|