/////////////////////////////////////////////////////////////////////////////
// Name: image.h
-// Purpose: documentation for wxImageHandler class
+// Purpose: interface of wxImageHandler
// Author: wxWidgets team
// RCS-ID: $Id$
// Licence: wxWindows license
@class wxImageHandler
@wxheader{image.h}
- This is the base class for implementing image file loading/saving, and image
- creation from data.
+ This is the base class for implementing image file loading/saving, and
+ image creation from data.
It is used within wxImage and is not normally seen by the application.
If you wish to extend the capabilities of wxImage, derive a class from
- wxImageHandler
- and add the handler using wxImage::AddHandler in your
+ wxImageHandler and add the handler using wxImage::AddHandler in your
application initialisation.
+ @stdobjects
+ ::wxNullImage
+
@library{wxcore}
@category{FIXME}
- @seealso
- wxImage, wxInitAllImageHandlers
+ @see wxImage, wxInitAllImageHandlers()
+
+ @todo Document all image handler types, indicating their library.
*/
class wxImageHandler : public wxObject
{
/**
Gets the file extension associated with this handler.
*/
- const wxString GetExtension();
+ const wxString GetExtension() const;
/**
If the image file contains more than one image and the image handler is capable
of retrieving these individually, this function will return the number of
available images.
-
+
@param stream
Opened input stream for reading image data. Currently, the stream must
support seeking.
-
- @returns Number of available images. For most image handlers, this is 1
+
+ @return Number of available images. For most image handlers, this is 1
(exceptions are TIFF and ICO formats).
*/
int GetImageCount(wxInputStream& stream);
/**
Gets the MIME type associated with this handler.
*/
- const wxString GetMimeType();
+ const wxString GetMimeType() const;
/**
Gets the name of this handler.
*/
- const wxString GetName();
+ const wxString GetName() const;
/**
Gets the image type associated with this handler.
*/
- long GetType();
+ long GetType() const;
/**
Loads a image from a stream, putting the resulting data into @e image. If the
more than one image and the image handler is capable of retrieving these
individually, @e index
indicates which image to read from the stream.
-
+
@param image
The image object which is to be affected by this operation.
@param stream
wxLogMessages.
@param index
The index of the image in the file (starting from zero).
-
- @returns @true if the operation succeeded, @false otherwise.
-
+
+ @return @true if the operation succeeded, @false otherwise.
+
@see wxImage::LoadFile, wxImage::SaveFile, SaveFile()
*/
bool LoadFile(wxImage* image, wxInputStream& stream,
/**
Saves a image in the output stream.
-
+
@param image
The image object which is to be affected by this operation.
@param stream
Opened output stream for writing the data.
-
- @returns @true if the operation succeeded, @false otherwise.
-
+
+ @return @true if the operation succeeded, @false otherwise.
+
@see wxImage::LoadFile, wxImage::SaveFile, LoadFile()
*/
bool SaveFile(wxImage* image, wxOutputStream& stream);
/**
Sets the handler extension.
-
+
@param extension
Handler extension.
*/
/**
Sets the handler MIME type.
-
+
@param mimename
Handler MIME type.
*/
/**
Sets the handler name.
-
+
@param name
Handler name.
*/
};
+
/**
@class wxImage
@wxheader{image.h}
- This class encapsulates a platform-independent image. An image can be created
- from data, or using wxBitmap::ConvertToImage. An image
- can be loaded from a file in a variety of formats, and is extensible to new
- formats
- via image format handlers. Functions are available to set and get image bits, so
- it can be used for basic image manipulation.
+ This class encapsulates a platform-independent image. An image can be
+ created from data, or using wxBitmap::ConvertToImage. An image can be
+ loaded from a file in a variety of formats, and is extensible to new
+ formats via image format handlers. Functions are available to set and
+ get image bits, so it can be used for basic image manipulation.
A wxImage cannot (currently) be drawn directly to a wxDC. Instead,
a platform-specific wxBitmap object must be created from it using
the wxBitmap::wxBitmap(wxImage,int depth) constructor.
- This bitmap can then
- be drawn in a device context, using wxDC::DrawBitmap.
+ This bitmap can then be drawn in a device context, using wxDC::DrawBitmap.
One colour value of the image may be used as a mask colour which will lead to
- the automatic
- creation of a wxMask object associated to the bitmap object.
+ the automatic creation of a wxMask object associated to the bitmap object.
@library{wxcore}
@category{gdi}
- @seealso
- wxBitmap, wxInitAllImageHandlers
+ @stdobjects
+ ::wxNullImage
+
+ @see wxBitmap, wxInitAllImageHandlers(), wxPixelData
*/
class wxImage : public wxObject
{
public:
- //@{
+
/**
- Creates an image from XPM data.
+ Creates an empty wxImage object without an alpha channel.
+ */
+ wxImage();
+
+ /**
+ Creates an image with the given size and clears it if requested.
+ Does not create an alpha channel.
+
+ @param width
+ Specifies the width of the image.
+ @param height
+ Specifies the height of the image.
+ @clear
+ Clear the image with zeros.
+ */
+ wxImage(int width, int height, bool clear = true);
+
+ /**
+ Creates an image from data in memory. If static_data is false
+ then the wxImage will take ownership of the data and free it
+ afterwards. For this, it has to be allocated with @e malloc.
+
+ @param width
+ Specifies the width of the image.
+ @param height
+ Specifies the height of the image.
+ @param data
+ A pointer to RGB data
+ @param static_data
+ Indicates if the data should be free'd after use
+ */
+ wxImage(int width, int height, unsigned char* data, bool static_data = false);
+
+ /**
+ Creates an image from data in memory. If static_data is false
+ then the wxImage will take ownership of the data and free it
+ afterwards. For this, it has to be allocated with @e malloc.
+
@param width
Specifies the width of the image.
@param height
Specifies the height of the image.
+ @param data
+ A pointer to RGB data
+ @param alpha
+ A pointer to alpha-channel data
+ @param static_data
+ Indicates if the data should be free'd after use
+
+ */
+ wxImage(int width, int height, unsigned char* data, unsigned char* alpha, bool static_data = false );
+
+ /**
+ Creates an image from XPM data.
+
+ @param xpmData
+ A pointer to XPM image data.
+ */
+ wxImage(const char* const* xpmData);
+
+ /**
+ Creates an image from a file.
+
@param name
Name of the file from which to load the image.
- @param stream
- Opened input stream from which to load the image. Currently, the stream
- must support seeking.
@param type
May be one of the following:
-
-
-
-
-
-
- wxBITMAP_TYPE_BMP
-
-
-
-
- Load a Windows bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_GIF
-
-
-
-
- Load a GIF bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_JPEG
-
-
-
-
- Load a JPEG bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_PNG
-
-
-
-
- Load a PNG bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_PCX
-
-
-
-
- Load a PCX bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_PNM
-
-
-
-
- Load a PNM bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_TIF
-
-
-
-
- Load a TIFF bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_TGA
-
-
-
-
- Load a TGA bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_XPM
-
-
-
-
- Load a XPM bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_ICO
-
-
-
-
- Load a Windows icon file (ICO).
-
-
-
-
-
- wxBITMAP_TYPE_CUR
-
-
-
-
- Load a Windows cursor file (CUR).
-
-
-
-
-
- wxBITMAP_TYPE_ANI
-
-
-
-
- Load a Windows animated cursor file (ANI).
-
-
-
-
-
- wxBITMAP_TYPE_ANY
-
-
-
-
- Will try to autodetect the format.
- @param mimetype
- MIME type string (for example 'image/jpeg')
+ @li wxBITMAP_TYPE_BMP: Load a Windows bitmap file.
+ @li wxBITMAP_TYPE_GIF: Load a GIF bitmap file.
+ @li wxBITMAP_TYPE_JPEG: Load a JPEG bitmap file.
+ @li wxBITMAP_TYPE_PNG: Load a PNG bitmap file.
+ @li wxBITMAP_TYPE_PCX: Load a PCX bitmap file.
+ @li wxBITMAP_TYPE_PNM: Load a PNM bitmap file.
+ @li wxBITMAP_TYPE_TIF: Load a TIFF bitmap file.
+ @li wxBITMAP_TYPE_TGA: Load a TGA bitmap file.
+ @li wxBITMAP_TYPE_XPM: Load a XPM bitmap file.
+ @li wxBITMAP_TYPE_ICO: Load a Windows icon file (ICO).
+ @li wxBITMAP_TYPE_CUR: Load a Windows cursor file (CUR).
+ @li wxBITMAP_TYPE_ANI: Load a Windows animated cursor file (ANI).
+ @li wxBITMAP_TYPE_ANY: Will try to autodetect the format.
@param index
Index of the image to load in the case that the image file contains
- multiple images.
- This is only used by GIF, ICO and TIFF handlers. The default value (-1)
- means
- "choose the default image" and is interpreted as the first image (index=0)
- by
- the GIF and TIFF handler and as the largest and most colourful one by the
- ICO handler.
- @param xpmData
- A pointer to XPM image data.
-
+ multiple images. This is only used by GIF, ICO and TIFF handlers.
+ The default value (-1) means "choose the default image" and is
+ interpreted as the first image (index=0) by the GIF and TIFF handler
+ and as the largest and most colourful one by the ICO handler.
+
@remarks Depending on how wxWidgets has been configured, not all formats
may be available.
-
+
@see LoadFile()
*/
- wxImage();
- wxImage(const wxImage& image);
- wxImage(const wxBitmap& bitmap);
- wxImage(int width, int height, bool clear = true);
- wxImage(int width, int height, unsigned char* data,
- bool static_data = false);
- wxImage(const wxString& name, long type = wxBITMAP_TYPE_ANY,
- int index = -1);
- wxImage(const wxString& name, const wxString& mimetype,
- int index = -1);
- wxImage(wxInputStream& stream, long type = wxBITMAP_TYPE_ANY,
- int index = -1);
- wxImage(wxInputStream& stream, const wxString& mimetype,
- int index = -1);
- wxImage(const char* const* xpmData);
- //@}
+ wxImage(const wxString& name, long type = wxBITMAP_TYPE_ANY, int index = -1);
+
+ /**
+ Creates an image from a file using MIME-types to specify the type.
+
+ @param name
+ Name of the file from which to load the image.
+ @param type
+ See above
+ @param mimetype
+ MIME type string (for example 'image/jpeg')
+ @param index
+ See above
+ */
+ wxImage(const wxString& name, const wxString& mimetype, int index = -1);
+
+ /**
+ Creates an image from a stream.
+
+ @param stream
+ Opened input stream from which to load the image. Currently,
+ the stream must support seeking.
+ @param type
+ See above
+ @param index
+ See above.
+ */
+ wxImage(wxInputStream& stream, long type = wxBITMAP_TYPE_ANY, int index = -1);
+
+ /**
+ Creates an image from a stream using MIME-types to specify the type.
+
+ @param stream
+ Opened input stream from which to load the image. Currently,
+ the stream must support seeking.
+ @param mimetype
+ MIME type string (for example 'image/jpeg')
+ @param index
+ See above.
+ */
+ wxImage(wxInputStream& stream, const wxString& mimetype, int index = -1);
+
/**
Destructor.
*/
~wxImage();
- //@{
/**
- returns @true if the current image handlers can read this file
+ Register an image handler.
*/
static void AddHandler(wxImageHandler* handler);
- See also bool CanRead(const wxString& filename);
- //@}
/**
- Blurs the image in both horizontal and vertical directions by the specified
- pixel
- @e blurRadius. This should not be used when using a single mask colour
- for transparency.
-
- @see @ref horzblur() BlurHorizontal, @ref vertblur() BlurVertical
+ Blurs the image in both horizontal and vertical directions by the
+ specified pixel @e blurRadius. This should not be used when using
+ a single mask colour for transparency.
+
+ @see BlurHorizontal(), BlurVertical()
*/
wxImage Blur(int blurRadius);
/**
Blurs the image in the horizontal direction only. This should not be used
when using a single mask colour for transparency.
-
- @see Blur(), @ref vertblur() BlurVertical
+
+ @see Blur(), BlurVertical()
*/
wxImage BlurHorizontal(int blurRadius);
/**
Blurs the image in the vertical direction only. This should not be used
when using a single mask colour for transparency.
-
- @see Blur(), @ref horzblur() BlurHorizontal
+
+ @see Blur(), BlurHorizontal()
*/
wxImage BlurVertical(int blurRadius);
+
+ /**
+ Returns @true if the current image handlers can read this file
+ */
+ bool CanRead(const wxString& filename);
/**
Deletes all image handlers.
Computes the histogram of the image. @a histogram is a reference to
wxImageHistogram object. wxImageHistogram is a specialization of
wxHashMap "template" and is defined as follows:
-
- @returns Returns number of colours in the histogram.
+
+ @return Returns number of colours in the histogram.
*/
- unsigned long ComputeHistogram(wxImageHistogram& histogram);
+ unsigned long ComputeHistogram(wxImageHistogram& histogram) const;
/**
If the image has alpha channel, this method converts it to mask. All pixels
FindFirstUnusedColour().
If the image image doesn't have alpha channel,
ConvertAlphaToMask does nothing.
-
- @returns @false if FindFirstUnusedColour returns @false, @true otherwise.
+
+ @return @false if FindFirstUnusedColour returns @false, @true otherwise.
*/
bool ConvertAlphaToMask(unsigned char threshold = 128);
Deprecated, use equivalent @ref wxBitmap::ctor "wxBitmap constructor"
(which takes wxImage and depth as its arguments) instead.
*/
- wxBitmap ConvertToBitmap();
+ wxBitmap ConvertToBitmap() const;
/**
Returns a greyscale version of the image. The returned image uses the luminance
(R * @e lr) + (G * @e lg) + (B * @e lb).
*/
wxImage ConvertToGreyscale(double lr = 0.299, double lg = 0.587,
- double lb = 0.114);
+ double lb = 0.114) const;
/**
Returns monochromatic version of the image. The returned image has white
everywhere else.
*/
wxImage ConvertToMono(unsigned char r, unsigned char g,
- unsigned char b);
+ unsigned char b) const;
/**
Returns an identical copy of the image.
*/
- wxImage Copy();
+ wxImage Copy() const;
/**
Creates a fresh image. If @a clear is @true, the new image will be initialized
to black.
Otherwise, the image data will be uninitialized.
-
+
@param width
The width of the image in pixels.
@param height
The height of the image in pixels.
-
- @returns @true if the call succeeded, @false otherwise.
+
+ @return @true if the call succeeded, @false otherwise.
*/
bool Create(int width, int height, bool clear = true);
@param startR,startG,startB
Initial values of the colour. Returned colour
will have RGB values equal to or greater than these.
-
- @returns Returns @false if there is no unused colour left, @true on success.
+
+ @return Returns @false if there is no unused colour left, @true on success.
*/
bool FindFirstUnusedColour(unsigned char* r, unsigned char* g,
unsigned char* b,
//@{
/**
Finds the handler associated with the given MIME type.
-
+
@param name
The handler name.
@param extension
The image type, such as wxBITMAP_TYPE_BMP.
@param mimetype
MIME type.
-
- @returns A pointer to the handler if found, @NULL otherwise.
-
+
+ @return A pointer to the handler if found, @NULL otherwise.
+
@see wxImageHandler
*/
static wxImageHandler* FindHandler(const wxString& name);
static wxImageHandler* FindHandlerMime(const wxString& mimetype);
//@}
- //@{
+ /**
+ Return alpha value at given pixel location.
+ */
+ unsigned char GetAlpha(int x, int y) const;
+
/**
Returns pointer to the array storing the alpha values for this image. This
pointer is @NULL for the images without the alpha channel. If the image
does have it, this pointer may be used to directly manipulate the alpha values
- which are stored as the @ref getdata() RGB ones.
+ which are stored as the RGB ones.
*/
- unsigned char GetAlpha(int x, int y);
- unsigned char* GetAlpha();
- //@}
+ const unsigned char * GetAlpha() const;
/**
Returns the blue intensity at the given coordinate.
*/
- unsigned char GetBlue(int x, int y);
+ unsigned char GetBlue(int x, int y) const;
/**
Returns the image data as an array. This is most often used when doing
You should not delete the returned pointer nor pass it to
SetData().
*/
- unsigned char* GetData();
+ unsigned char* GetData() const;
/**
Returns the green intensity at the given coordinate.
*/
- unsigned char GetGreen(int x, int y);
+ unsigned char GetGreen(int x, int y) const;
/**
Returns the static list of image format handlers.
-
+
@see wxImageHandler
*/
static wxList GetHandlers();
/**
Gets the height of the image in pixels.
*/
- int GetHeight();
+ int GetHeight() const;
//@{
/**
If the image file contains more than one image and the image handler is capable
of retrieving these individually, this function will return the number of
available images.
-
+
@param name
Name of the file to query.
@param stream
- Opened input stream with image data. Currently, the stream must support
- seeking.
+ Opened input stream with image data. Currently, the stream must
+ support seeking.
@param type
May be one of the following:
-
-
-
-
-
-
- wxBITMAP_TYPE_BMP
-
-
-
-
- Load a Windows bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_GIF
-
-
-
-
- Load a GIF bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_JPEG
-
-
-
-
- Load a JPEG bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_PNG
-
-
-
-
- Load a PNG bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_PCX
-
-
-
-
- Load a PCX bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_PNM
-
-
-
-
- Load a PNM bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_TIF
-
-
-
-
- Load a TIFF bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_XPM
-
-
-
-
- Load a XPM bitmap file.
-
-
-
-
-
- wxBITMAP_TYPE_ICO
-
-
-
-
- Load a Windows icon file (ICO).
-
-
-
-
-
- wxBITMAP_TYPE_CUR
-
-
-
-
- Load a Windows cursor file (CUR).
-
-
-
-
-
- wxBITMAP_TYPE_ANI
-
-
-
-
- Load a Windows animated cursor file (ANI).
-
-
-
-
-
- wxBITMAP_TYPE_ANY
-
-
-
-
- Will try to autodetect the format.
-
- @returns Number of available images. For most image handlers, this is 1
+ @li wxBITMAP_TYPE_BMP: Load a Windows bitmap file.
+ @li wxBITMAP_TYPE_GIF: Load a GIF bitmap file.
+ @li wxBITMAP_TYPE_JPEG: Load a JPEG bitmap file.
+ @li wxBITMAP_TYPE_PNG: Load a PNG bitmap file.
+ @li wxBITMAP_TYPE_PCX: Load a PCX bitmap file.
+ @li wxBITMAP_TYPE_PNM: Load a PNM bitmap file.
+ @li wxBITMAP_TYPE_TIF: Load a TIFF bitmap file.
+ @li wxBITMAP_TYPE_TGA: Load a TGA bitmap file.
+ @li wxBITMAP_TYPE_XPM: Load a XPM bitmap file.
+ @li wxBITMAP_TYPE_ICO: Load a Windows icon file (ICO).
+ @li wxBITMAP_TYPE_CUR: Load a Windows cursor file (CUR).
+ @li wxBITMAP_TYPE_ANI: Load a Windows animated cursor file (ANI).
+ @li wxBITMAP_TYPE_ANY: Will try to autodetect the format.
+
+ @return Number of available images. For most image handlers, this is 1
(exceptions are TIFF and ICO formats).
*/
static int GetImageCount(const wxString& filename,
Iterates all registered wxImageHandler objects, and returns a string containing
file extension masks
suitable for passing to file open/save dialog boxes.
-
- @returns The format of the returned string is
+
+ @return The format of the returned string is
"(*.ext1;*.ext2)|*.ext1;*.ext2".
-
+
@see wxImageHandler
*/
static wxString GetImageExtWildcard();
/**
Gets the blue value of the mask colour.
*/
- unsigned char GetMaskBlue();
+ unsigned char GetMaskBlue() const;
/**
Gets the green value of the mask colour.
*/
- unsigned char GetMaskGreen();
+ unsigned char GetMaskGreen() const;
/**
Gets the red value of the mask colour.
*/
- unsigned char GetMaskRed();
+ unsigned char GetMaskRed() const;
/**
Gets a user-defined option. The function is case-insensitive to @e name.
For example, when saving as a JPEG file, the option @b quality is
used, which is a number between 0 and 100 (0 is terrible, 100 is very good).
-
+
@see SetOption(), GetOptionInt(), HasOption()
*/
- wxString GetOption(const wxString& name);
+ wxString GetOption(const wxString& name) const;
/**
- Gets a user-defined option as an integer. The function is case-insensitive to
- @e name.
- If the given option is not present, the function returns 0. Use
- HasOption() is 0 is a possibly valid value
- for the option.
+ Gets a user-defined option as an integer. The function is case-insensitive
+ to @e name. If the given option is not present, the function returns 0.
+ Use HasOption() is 0 is a possibly valid value for the option.
Options for wxPNGHandler
-
- wxIMAGE_OPTION_PNG_FORMAT
-
- Format for saving a PNG file.
-
- wxIMAGE_OPTION_PNG_BITDEPTH
-
- Bit depth for every channel (R/G/B/A).
+ @li wxIMAGE_OPTION_PNG_FORMAT: Format for saving a PNG file.
+ @li wxIMAGE_OPTION_PNG_BITDEPTH: Bit depth for every channel (R/G/B/A).
Supported values for wxIMAGE_OPTION_PNG_FORMAT:
-
- wxPNG_TYPE_COLOUR
-
- Stores RGB image.
-
- wxPNG_TYPE_GREY
-
- Stores grey image, converts from RGB.
-
- wxPNG_TYPE_GREY_RED
-
- Stores grey image, uses red value as grey.
-
+ @li wxPNG_TYPE_COLOUR: Stores RGB image.
+ @li wxPNG_TYPE_GREY: Stores grey image, converts from RGB.
+ @li wxPNG_TYPE_GREY_RED: Stores grey image, uses red value as grey.
+
@see SetOption(), GetOption()
*/
- int GetOptionInt(const wxString& name);
+ int GetOptionInt(const wxString& name) const;
/**
Get the current mask colour or find a suitable unused colour that could be
used as a mask colour. Returns @true if the image currently has a mask.
*/
bool GetOrFindMaskColour(unsigned char r, unsigned char g,
- unsigned char b);
+ unsigned char b) const;
/**
Returns the palette associated with the image. Currently the palette is only
have been modified to set the palette if one exists in the image file (usually
256 or less colour images in GIF or PNG format).
*/
- const wxPalette GetPalette();
+ const wxPalette GetPalette() const;
/**
Returns the red intensity at the given coordinate.
*/
- unsigned char GetRed(int x, int y);
+ unsigned char GetRed(int x, int y) const;
/**
Returns a sub image of the current one as long as the rect belongs entirely to
the image.
*/
- wxImage GetSubImage(const wxRect& rect);
+ wxImage GetSubImage(const wxRect& rect) const;
/**
Gets the width of the image in pixels.
-
+
@see GetHeight()
*/
- int GetWidth();
+ int GetWidth() const;
/**
Constructor for HSVValue, an object that contains values for hue, saturation
/**
Returns @true if this image has alpha channel, @false otherwise.
-
+
@see GetAlpha(), SetAlpha()
*/
- bool HasAlpha();
+ bool HasAlpha() const;
/**
Returns @true if there is a mask active, @false otherwise.
*/
- bool HasMask();
+ bool HasMask() const;
/**
Returns @true if the given option is present. The function is case-insensitive
to @e name.
-
+
@see SetOption(), GetOption(), GetOptionInt()
*/
- bool HasOption(const wxString& name);
+ bool HasOption(const wxString& name) const;
/**
Initializes the image alpha channel data. It is an error to call it
for the time being, which is used by wxBitmap.
This function is called by wxWidgets on startup, and shouldn't be called by
the user.
-
- @see wxImageHandler, wxInitAllImageHandlers, wxQuantize
+
+ @see wxImageHandler, wxInitAllImageHandlers(), wxQuantize
*/
static void InitStandardHandlers();
/**
Adds a handler at the start of the static list of format handlers.
-
+
@param handler
A new image format handler object. There is usually only one instance
of a given handler class in an application session.
-
+
@see wxImageHandler
*/
static void InsertHandler(wxImageHandler* handler);
/**
Returns @true if image data is present.
*/
- bool IsOk();
+ bool IsOk() const;
/**
Returns @true if the given pixel is transparent, i.e. either has the mask
colour if this image has a mask or if this image has alpha channel and alpha
value of this pixel is strictly less than @e threshold.
*/
- bool IsTransparent(int x, int y, unsigned char threshold = 128);
+ bool IsTransparent(int x, int y, unsigned char threshold = 128) const;
//@{
/**
Loads an image from an input stream.
-
+
@param name
Name of the file from which to load the image.
@param stream
- Opened input stream from which to load the image. Currently, the stream
- must support seeking.
+ Opened input stream from which to load the image. Currently, the
+ stream must support seeking.
@param type
- One of the following values:
-
-
-
-
-
-
- wxBITMAP_TYPE_BMP
-
-
-
-
- Load a Windows image file.
-
-
-
-
-
- wxBITMAP_TYPE_GIF
-
-
-
-
- Load a GIF image file.
-
-
-
-
-
- wxBITMAP_TYPE_JPEG
-
-
-
-
- Load a JPEG image file.
-
-
-
-
-
- wxBITMAP_TYPE_PCX
-
-
-
-
- Load a PCX image file.
-
-
-
-
-
- wxBITMAP_TYPE_PNG
-
-
-
-
- Load a PNG image file.
-
-
-
-
-
- wxBITMAP_TYPE_PNM
-
-
-
-
- Load a PNM image file.
-
-
-
-
-
- wxBITMAP_TYPE_TIF
-
-
-
-
- Load a TIFF image file.
-
-
-
-
-
- wxBITMAP_TYPE_XPM
-
-
-
-
- Load a XPM image file.
-
-
-
-
-
- wxBITMAP_TYPE_ICO
-
-
-
-
- Load a Windows icon file (ICO).
-
-
-
-
-
- wxBITMAP_TYPE_CUR
-
-
-
-
- Load a Windows cursor file (CUR).
-
-
-
-
-
- wxBITMAP_TYPE_ANI
-
-
-
-
- Load a Windows animated cursor file (ANI).
-
-
-
-
-
- wxBITMAP_TYPE_ANY
-
-
-
-
- Will try to autodetect the format.
+ May be one of the following:
+ @li wxBITMAP_TYPE_BMP: Load a Windows bitmap file.
+ @li wxBITMAP_TYPE_GIF: Load a GIF bitmap file.
+ @li wxBITMAP_TYPE_JPEG: Load a JPEG bitmap file.
+ @li wxBITMAP_TYPE_PNG: Load a PNG bitmap file.
+ @li wxBITMAP_TYPE_PCX: Load a PCX bitmap file.
+ @li wxBITMAP_TYPE_PNM: Load a PNM bitmap file.
+ @li wxBITMAP_TYPE_TIF: Load a TIFF bitmap file.
+ @li wxBITMAP_TYPE_TGA: Load a TGA bitmap file.
+ @li wxBITMAP_TYPE_XPM: Load a XPM bitmap file.
+ @li wxBITMAP_TYPE_ICO: Load a Windows icon file (ICO).
+ @li wxBITMAP_TYPE_CUR: Load a Windows cursor file (CUR).
+ @li wxBITMAP_TYPE_ANI: Load a Windows animated cursor file (ANI).
+ @li wxBITMAP_TYPE_ANY: Will try to autodetect the format.
@param mimetype
MIME type string (for example 'image/jpeg')
@param index
Index of the image to load in the case that the image file contains
- multiple images.
- This is only used by GIF, ICO and TIFF handlers. The default value (-1)
- means
- "choose the default image" and is interpreted as the first image (index=0)
- by
- the GIF and TIFF handler and as the largest and most colourful one by the
- ICO handler.
-
- @returns @true if the operation succeeded, @false otherwise. If the
+ multiple images. This is only used by GIF, ICO and TIFF handlers.
+ The default value (-1) means "choose the default image" and is
+ interpreted as the first image (index=0) by the GIF and TIFF handler
+ and as the largest and most colourful one by the ICO handler.
+
+ @return @true if the operation succeeded, @false otherwise. If the
optional index parameter is out of range, @false is
returned and a call to wxLogError() takes place.
-
+
@remarks Depending on how wxWidgets has been configured, not all formats
may be available.
-
+
@see SaveFile()
*/
bool LoadFile(const wxString& name,
Returns a mirrored copy of the image. The parameter @e horizontally
indicates the orientation.
*/
- wxImage Mirror(bool horizontally = true);
+ wxImage Mirror(bool horizontally = true) const;
/**
Copy the data of the given @a image to the specified position in this image.
/**
Finds the handler with the given name, and removes it. The handler
is not deleted.
-
+
@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 wxImageHandler
*/
static bool RemoveHandler(const wxString& name);
the image will have the given width and height.
For a description of the @a quality parameter, see the Scale() function.
Returns the (modified) image itself.
-
+
@see Scale()
*/
wxImage Rescale(int width, int height,
then use either the current mask colour if set or find, use, and set a
suitable mask colour for any newly exposed areas.
Returns the (modified) image itself.
-
+
@see Size()
*/
wxImage Resize(const wxSize& size, const wxPoint pos,
Returns a copy of the image rotated 90 degrees in the direction
indicated by @e clockwise.
*/
- wxImage Rotate90(bool clockwise = true);
+ wxImage Rotate90(bool clockwise = true) const;
/**
Rotates the hue of each pixel in the image by @e angle, which is a double in
//@{
/**
Saves an image in the given stream.
-
+
@param name
Name of the file to save the image to.
@param stream
Opened output stream to save the image to.
@param type
Currently these types can be used:
-
-
-
-
-
-
- wxBITMAP_TYPE_BMP
-
-
-
-
- Save a BMP image file.
-
-
-
-
-
- wxBITMAP_TYPE_JPEG
-
-
-
-
- Save a JPEG image file.
-
-
-
-
-
- wxBITMAP_TYPE_PNG
-
-
-
-
- Save a PNG image file.
-
-
-
-
-
- wxBITMAP_TYPE_PCX
-
-
-
-
- Save a PCX image file (tries to save as 8-bit if possible, falls back to
- 24-bit otherwise).
-
-
-
-
-
- wxBITMAP_TYPE_PNM
-
-
-
-
- Save a PNM image file (as raw RGB always).
-
-
-
-
-
- wxBITMAP_TYPE_TIFF
-
-
-
-
- Save a TIFF image file.
-
-
-
-
-
- wxBITMAP_TYPE_XPM
-
-
-
-
- Save a XPM image file.
-
-
-
-
-
- wxBITMAP_TYPE_ICO
-
-
-
-
- Save a Windows icon file (ICO) (the size may be up to 255 wide by 127 high.
- A single image is saved in 8 colors at the size supplied).
-
-
-
-
-
- wxBITMAP_TYPE_CUR
-
-
-
-
- Save a Windows cursor file (CUR).
+ @li wxBITMAP_TYPE_BMP: Save a BMP image file.
+ @li wxBITMAP_TYPE_JPEG: Save a JPEG image file.
+ @li wxBITMAP_TYPE_PNG: Save a PNG image file.
+ @li wxBITMAP_TYPE_PCX: Save a PCX image file (tries to save as 8-bit if possible,
+ falls back to 24-bit otherwise).
+ @li wxBITMAP_TYPE_PNM: Save a PNM image file (as raw RGB always).
+ @li wxBITMAP_TYPE_TIFF: Save a TIFF image file.
+ @li wxBITMAP_TYPE_XPM: Save a XPM image file.
+ @li wxBITMAP_TYPE_ICO: Save a Windows icon file (ICO) (the size may
+ be up to 255 wide by 127 high. A single image is saved in 8 colors
+ at the size supplied).
+ @li wxBITMAP_TYPE_CUR: Save a Windows cursor file (CUR).
@param mimetype
MIME type.
-
- @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, int type);
- bool SaveFile(const wxString& name, const wxString& mimetype);
- bool SaveFile(const wxString& name);
- bool SaveFile(wxOutputStream& stream, int type);
- bool SaveFile(wxOutputStream& stream,
- const wxString& mimetype);
+ bool SaveFile(const wxString& name, int type) const;
+ const bool SaveFile(const wxString& name,
+ const wxString& mimetype) const;
+ const bool SaveFile(const wxString& name) const;
+ const bool SaveFile(wxOutputStream& stream, int type) const;
+ const bool SaveFile(wxOutputStream& stream,
+ const wxString& mimetype) const;
//@}
/**
image and will therefore remove the mask partially. Using the alpha channel
will work.
Example:
-
+
@param quality
- Determines what method to use for resampling the image. Can be one of the
- following:
-
-
-
-
-
-
- wxIMAGE_QUALITY_NORMAL
-
-
-
-
- Uses the normal default scaling method of pixel replication
-
-
-
-
-
- wxIMAGE_QUALITY_HIGH
-
-
-
-
- Uses bicubic and box averaging resampling methods for upsampling and
- downsampling respectively
-
+ Determines what method to use for resampling the image.
+
+ Can be one of the following:
+ @li wxIMAGE_QUALITY_NORMAL: Uses the normal default scaling method of
+ pixel replication
+ @li wxIMAGE_QUALITY_HIGH: Uses bicubic and box averaging resampling
+ methods for upsampling and downsampling respectively
+
@see Rescale()
*/
wxImage Scale(int width, int height,
- int quality = wxIMAGE_QUALITY_NORMAL);
+ int quality = wxIMAGE_QUALITY_NORMAL) const;
- //@{
- /**
- Sets the alpha value for the given pixel. This function should only be called
- if the image has alpha channel data, use HasAlpha() to
- check for this.
+ /**
+ Assigns new data as alpha channel to the image.
+ If @e static_data is false the data will be
+ free()'d after use.
*/
void SetAlpha(unsigned char* alpha = NULL,
bool static_data = false);
+
+ /**
+ Sets the alpha value for the given pixel. This function should only be
+ called if the image has alpha channel data, use HasAlpha() to
+ check for this.
+ */
void SetAlpha(int x, int y, unsigned char alpha);
- //@}
/**
Sets the image data without performing checks. The data given must have
image.
@param mr,mg,mb
RGB value of pixels in mask that will be used to create the mask.
-
- @returns Returns @false if mask does not have same dimensions as the image
+
+ @return Returns @false if mask does not have same dimensions as the image
or if there is no unused colour left. Returns @true if
the mask was successfully applied.
*/
Sets a user-defined option. The function is case-insensitive to @e name.
For example, when saving as a JPEG file, the option @b quality is
used, which is a number between 0 and 100 (0 is terrible, 100 is very good).
-
+
@see GetOption(), GetOptionInt(), HasOption()
*/
void SetOption(const wxString& name, const wxString& value);
transparent by filling them with the image mask colour (which will be allocated
automatically if it isn't currently set). Otherwise, the areas will be filled
with the colour with the specified RGB components.
-
+
@see Resize()
*/
wxImage Size(const wxSize& size, const wxPoint pos, int red = -1,
- int green = -1, int blue = -1);
+ int green = -1, int blue = -1) const;
/**
Assignment operator, using @ref overview_trefcount "reference counting".
-
+
@param image
Image to assign.
-
- @returns Returns 'this' object.
+
+ @return Returns 'this' object.
*/
wxImage operator =(const wxImage& image);
};
-
// ============================================================================
// Global functions/macros
// ============================================================================
+/** @ingroup group_funcmacro_appinitterm */
+//@{
+
/**
Initializes all available image handlers. For a list of available handlers,
see wxImage.
@see wxImage, wxImageHandler
+
+ @header{wx/image.h}
*/
void wxInitAllImageHandlers();
+//@}
+
projects / wxWidgets.git / blobdiff