// Purpose: interface of wxImageHandler and wxImage
// Author: wxWidgets team
// RCS-ID: $Id$
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
/**
/**
Returns @true if this handler supports the image format contained in the
given stream.
-
+
This function doesn't modify the current stream position (because it
restores the original position before returning; this however requires the
stream to be seekable; see wxStreamBase::IsSeekable).
*/
- bool CanRead( wxInputStream& stream );
+ bool CanRead( wxInputStream& stream );
/**
Returns @true if this handler supports the image format contained in the
file with the given name.
-
+
This function doesn't modify the current stream position (because it
restores the original position before returning; this however requires the
stream to be seekable; see wxStreamBase::IsSeekable).
*/
bool CanRead( const wxString& filename );
-
+
/**
Gets the preferred file extension associated with this handler.
{
public:
/**
- A simple class which stores red, green and blue values as 8 bit unsigned integers
+ A simple class which stores red, green and blue values as 8 bit unsigned integers
in the range of 0-255.
*/
class RGBValue
If @true, initialize the image to black.
*/
wxImage(int width, int height, bool clear = true);
-
+
/**
@overload
*/
@overload
*/
wxImage(const wxSize& sz, unsigned char* data, bool static_data = false);
-
+
/**
Creates an image from data in memory. If @a static_data is @false
then the wxImage will take ownership of the data and free it
*/
wxImage(const wxSize& sz, unsigned char* data, unsigned char* data, unsigned char* alpha,
bool static_data = false);
-
+
/**
Creates an image from XPM data.
@param xpmData
A pointer to XPM image data.
+
+ @beginWxPerlOnly
+ Not supported by wxPerl.
+ @endWxPerlOnly
*/
wxImage(const char* const* xpmData);
*/
virtual ~wxImage();
-
-
+
+
/**
@name Image creation, initialization and deletion functions
*/
//@{
-
+
/**
Returns an identical copy of this image.
*/
/**
Creates a fresh image.
See wxImage::wxImage(int,int,unsigned char*,bool) for more info.
-
+
@return @true if the call succeeded, @false otherwise.
*/
bool Create( int width, int height, unsigned char* data, bool static_data = false );
/**
Creates a fresh image.
See wxImage::wxImage(int,int,unsigned char*,unsigned char*,bool) for more info.
-
+
@return @true if the call succeeded, @false otherwise.
*/
bool Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data = false );
-
+
/**
@overload
*/
bool Create( const wxSize& sz, unsigned char* data, unsigned char* alpha, bool static_data = false );
-
+
/**
Initialize the image data with zeroes (the default) or with the
byte value given as @a value.
Destroys the image data.
*/
void Destroy();
-
+
/**
Initializes the image alpha channel data.
*/
wxImage Scale(int width, int height,
wxImageResizeQuality quality = wxIMAGE_QUALITY_NORMAL) const;
-
+
/**
Returns a resized version of this image without scaling it by adding either a
border with the given colour or cropping as necessary.
FindFirstUnusedColour() by this function, see the overload below if you
this is not appropriate.
- @return @false if FindFirstUnusedColour returns @false, @true otherwise.
+ @return Returns @true on success, @false on error.
*/
bool ConvertAlphaToMask(unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD);
are set. Pixels with the alpha values above the threshold are
considered to be opaque.
+ @return Returns @true on success, @false on error.
*/
- void ConvertAlphaToMask(unsigned char mr, unsigned char mg, unsigned char mb,
+ bool ConvertAlphaToMask(unsigned char mr, unsigned char mg, unsigned char mb,
unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD);
/**
The returned image uses the luminance component of the original to
calculate the greyscale. Defaults to using the standard ITU-T BT.601
when converting to YUV, where every pixel equals
- (R * @a lr) + (G * @a lg) + (B * @a lb).
+ (R * @a weight_r) + (G * @a weight_g) + (B * @a weight_b).
*/
- wxImage ConvertToGreyscale(double lr = 0.299, double lg = 0.587, double lb = 1.114) const;
+ wxImage ConvertToGreyscale(double weight_r, double weight_g, double weight_b) const;
+
+ /**
+ Returns a greyscale version of the image.
+ @since 2.9.0
+ */
+ wxImage ConvertToGreyscale() const;
/**
Returns monochromatic version of the image.
colour and black colour everywhere else.
*/
wxImage ConvertToMono(unsigned char r, unsigned char g, unsigned char b) const;
-
+
+ /**
+ Returns disabled (dimmed) version of the image.
+ @since 2.9.0
+ */
+ wxImage ConvertToDisabled(unsigned char brightness = 255) const;
+
//@}
-
-
+
+
/**
@name Miscellaneous functions
*/
//@{
-
+
/**
Computes the histogram of the image. @a histogram is a reference to
wxImageHistogram object. wxImageHistogram is a specialization of
@return Returns number of colours in the histogram.
*/
unsigned long ComputeHistogram(wxImageHistogram& histogram) const;
-
+
/**
Finds the first colour that is never used in the image.
The search begins at given initial colour and continues by increasing
@return Returns 'this' object.
*/
wxImage& operator=(const wxImage& image);
-
+
//@}
-
-
+
+
/**
@name Getters
*/
@see GetHeight(), GetWidth()
*/
wxSize GetSize() const;
-
+
/**
Gets a user-defined string-valued option.
*/
void SetAlpha(int x, int y, unsigned char alpha);
+ /**
+ Removes the alpha channel from the image.
+
+ This function should only be called if the image has alpha channel data,
+ use HasAlpha() to check for this.
+
+ @since 2.9.1
+ */
+ void ClearAlpha();
+
/**
Sets the image data without performing checks.
The data must have been allocated with @c malloc(), @b NOT with
@c operator new.
- If @a static_data is @false, after this call the pointer to the data is
+ If @a static_data is @false, after this call the pointer to the data is
owned by the wxImage object, that will be responsible for deleting it.
Do not pass to this function a pointer obtained through GetData().
*/
void SetData(unsigned char* data, bool static_data = false);
-
+
/**
@overload
*/
@see GetOption(), GetOptionInt(), HasOption()
*/
void SetOption(const wxString& name, const wxString& value);
-
- /**
+
+ /**
@overload
*/
void SetOption(const wxString& name, int value);
void SetType(wxBitmapType type);
//@}
-
-
-
+
+
+
/**
@name Handler management functions
*/
//@{
-
+
/**
Register an image handler.
See @ref image_handlers for a list of the available handlers.
This function is called by wxWidgets on exit.
*/
static void CleanUpHandlers();
-
+
/**
Finds the handler with the given name.
@see wxImageHandler
*/
static bool RemoveHandler(const wxString& name);
-
+
//@}
-
-
+
+
/**
- Returns @true if at least one of the available image handlers can read
+ Returns @true if at least one of the available image handlers can read
the file with the given name.
-
+
See wxImageHandler::CanRead for more info.
*/
static bool CanRead(const wxString& filename);
-
+
/**
- Returns @true if at least one of the available image handlers can read
+ Returns @true if at least one of the available image handlers can read
the data in the given stream.
-
+
See wxImageHandler::CanRead for more info.
*/
static bool CanRead(wxInputStream& stream);
of the file to query.
For the overload taking the parameter @a stream, that's the opened input
stream with image data.
-
+
See wxImageHandler::GetImageCount() for more info.
The parameter @a type may be one of the following values:
@see wxImageHandler
*/
static wxString GetImageExtWildcard();
-
+
/**
Converts a color in RGB color space to HSV color space.
*/
static wxImage::HSVValue RGBtoHSV(const wxImage::RGBValue& rgb);
-
+
/**
Converts a color in HSV color space to RGB color space.
*/
/**
Initializes all available image handlers. For a list of available handlers,
see wxImage.
- If you don't need/want all image handlers loaded
+ If you don't need/want all image handlers loaded
@see wxImage, wxImageHandler
projects / wxWidgets.git / blobdiff