Virtualize StartEditor and add implementations for the ports that can do it.

[wxWidgets.git] / interface / wx / image.h

diff --git a/interface/wx/image.h b/interface/wx/image.h
index b083796d72434ae5719689c26732d057983ffb06..34808c5c15ee0651aab1322f180cdc09d314bdc6 100644 (file)
--- a/interface/wx/image.h
+++ b/interface/wx/image.h
@@ -39,10 +39,25 @@ enum wxImageResizeQuality
     /// Highest quality but slowest execution time.
     wxIMAGE_QUALITY_BICUBIC,
 
     /// Highest quality but slowest execution time.
     wxIMAGE_QUALITY_BICUBIC,
 

-    /// Default image resizing algorithm used by wxImage::Scale().
+    /**
+    Use surrounding pixels to calculate an average that will be used for
+    new pixels. This method is typically used when reducing the size of
+    an image.
+    */
+    wxIMAGE_QUALITY_BOX_AVERAGE,
+
+    /**
+    Default image resizing algorithm used by wxImage::Scale(). Currently
+    the same as wxIMAGE_QUALITY_NEAREST.
+    */

     wxIMAGE_QUALITY_NORMAL,
 
     wxIMAGE_QUALITY_NORMAL,
 

-    /// Best image resizing algorithm, currently same as wxIMAGE_QUALITY_BICUBIC.
+    /**
+    Best image resizing algorithm. Since version 2.9.2 this results in
+    wxIMAGE_QUALITY_BOX_AVERAGE being used when reducing the size of the
+    image (meaning that both the new width and height will be smaller than
+    the original size). Otherwise wxIMAGE_QUALITY_BICUBIC is used.
+    */

     wxIMAGE_QUALITY_HIGH
 };
 
     wxIMAGE_QUALITY_HIGH
 };
 


@@ -55,7 +70,8 @@ enum wxImagePNGType
 {
     wxPNG_TYPE_COLOUR = 0,      ///< Colour PNG image.
     wxPNG_TYPE_GREY = 2,        ///< Greyscale PNG image converted from RGB.
 {
     wxPNG_TYPE_COLOUR = 0,      ///< Colour PNG image.
     wxPNG_TYPE_GREY = 2,        ///< Greyscale PNG image converted from RGB.

-    wxPNG_TYPE_GREY_RED = 3     ///< Greyscale PNG image using red as grey.
+    wxPNG_TYPE_GREY_RED = 3,    ///< Greyscale PNG image using red as grey.
+    wxPNG_TYPE_PALETTE = 4      ///< Palette encoding.

 };
 
 /**
 };
 
 /**


@@ -254,6 +270,20 @@ public:
             Handler name.
     */
     void SetName(const wxString& name);
             Handler name.
     */
     void SetName(const wxString& name);

+
+    /**
+        Retrieve the version information about the image library used by this
+        handler.
+
+        This method is not present in wxImageHandler class itself but is
+        present in a few of the classes deriving from it, currently
+        wxJPEGHandler, wxPNGHandler and wxTIFFHandler. It returns the
+        information about the version of the image library being used for the
+        corresponding handler implementation.
+
+        @since 2.9.2
+     */
+     static wxVersionInfo GetLibraryVersionInfo();

 };
 
 
 };
 
 


@@ -301,10 +331,12 @@ const unsigned char wxIMAGE_ALPHA_OPAQUE = 0xff;
 
     While all images have RGB data, not all images have an alpha channel. Before
     using wxImage::GetAlpha you should check if this image contains an alpha
 
     While all images have RGB data, not all images have an alpha channel. Before
     using wxImage::GetAlpha you should check if this image contains an alpha

-    channel with wxImage::HasAlpha. Note that currently only the PNG format has
-    full alpha channel support so only the images loaded from PNG files can have
-    alpha and, if you initialize the image alpha channel yourself using
-    wxImage::SetAlpha, you should save it in PNG format to avoid losing it.
+    channel with wxImage::HasAlpha. Currently the BMP, PNG, and TIFF format
+    handlers have full alpha channel support for loading so if you want to use
+    alpha you have to use one of these formats. If you initialize the image
+    alpha channel yourself using wxImage::SetAlpha, you should save it in
+    either PNG or TGA format to avoid losing it as these are the only handlers
+    that currently support saving with alpha.

 
 
     @section image_handlers Available image handlers
 
 
     @section image_handlers Available image handlers


@@ -314,14 +346,14 @@ const unsigned char wxIMAGE_ALPHA_OPAQUE = 0xff;
     To use other image formats, install the appropriate handler with
     wxImage::AddHandler or call ::wxInitAllImageHandlers().
 
     To use other image formats, install the appropriate handler with
     wxImage::AddHandler or call ::wxInitAllImageHandlers().
 

-    - wxBMPHandler: For loading and saving, always installed.
-    - wxPNGHandler: For loading (including alpha support) and saving.
+    - wxBMPHandler: For loading (including alpha support) and saving, always installed.
+    - wxPNGHandler: For loading and saving. Includes alpha support.

     - wxJPEGHandler: For loading and saving.
     - wxJPEGHandler: For loading and saving.

-    - wxGIFHandler: Only for loading, due to legal issues.
+    - wxGIFHandler: For loading and saving (see below).

     - wxPCXHandler: For loading and saving (see below).
     - wxPNMHandler: For loading and saving (see below).
     - wxPCXHandler: For loading and saving (see below).
     - wxPNMHandler: For loading and saving (see below).

-    - wxTIFFHandler: For loading and saving.
-    - wxTGAHandler: For loading only.
+    - wxTIFFHandler: For loading (including alpha support) and saving.
+    - wxTGAHandler: For loading and saving. Includes alpha support.

     - wxIFFHandler: For loading only.
     - wxXPMHandler: For loading and saving.
     - wxICOHandler: For loading and saving.
     - wxIFFHandler: For loading only.
     - wxXPMHandler: For loading and saving.
     - wxICOHandler: For loading and saving.


@@ -335,6 +367,8 @@ const unsigned char wxIMAGE_ALPHA_OPAQUE = 0xff;
     Loading PNMs only works for ASCII or raw RGB images.
     When saving in PNM format, wxPNMHandler will always save as raw RGB.
 
     Loading PNMs only works for ASCII or raw RGB images.
     When saving in PNM format, wxPNMHandler will always save as raw RGB.
 

+    Saving GIFs requires images of maximum 8 bpp (see wxQuantize), and the alpha channel converted to a mask (see wxImage::ConvertAlphaToMask).
+    Saving an animated GIF requires images of the same size (see wxGIFHandler::SaveAnimation)

 
     @library{wxcore}
     @category{gdi}
 
     @library{wxcore}
     @category{gdi}


@@ -728,6 +762,13 @@ public:
     */
     wxImage Rotate90(bool clockwise = true) const;
 
     */
     wxImage Rotate90(bool clockwise = true) const;
 

+    /**
+        Returns a copy of the image rotated by 180 degrees.
+
+        @since 2.9.2
+    */
+    wxImage Rotate180() const;
+

     /**
         Rotates the hue of each pixel in the image by @e angle, which is a double in
         the range of -1.0 to +1.0, where -1.0 corresponds to -360 degrees and +1.0
     /**
         Rotates the hue of each pixel in the image by @e angle, which is a double in
         the range of -1.0 to +1.0, where -1.0 corresponds to -360 degrees and +1.0


@@ -1051,7 +1092,7 @@ public:
 
         The function is case-insensitive to @a name.
         If the given option is not present, the function returns 0.
 
         The function is case-insensitive to @a name.
         If the given option is not present, the function returns 0.

-        Use HasOption() is 0 is a possibly valid value for the option.
+        Use HasOption() if 0 is a possibly valid value for the option.

 
         Generic options:
         @li @c wxIMAGE_OPTION_MAX_WIDTH and @c wxIMAGE_OPTION_MAX_HEIGHT: If either
 
         Generic options:
         @li @c wxIMAGE_OPTION_MAX_WIDTH and @c wxIMAGE_OPTION_MAX_HEIGHT: If either


@@ -1110,6 +1151,12 @@ public:
             the resulting PNG file. Use this option if your application produces
             images with small size variation.
 
             the resulting PNG file. Use this option if your application produces
             images with small size variation.
 

+        Options specific to wxGIFHandler:
+        @li @c wxIMAGE_OPTION_GIF_COMMENT: The comment text that is read from
+            or written to the GIF file. In an animated GIF each frame can have
+            its own comment. If there is only a comment in the first frame of
+            a GIF it will not be repeated in other frames.
+

         @param name
             The name of the option, case-insensitive.
         @return
         @param name
             The name of the option, case-insensitive.
         @return


@@ -1535,7 +1582,19 @@ public:
 
     /**
         Register an image handler.
 
     /**
         Register an image handler.

-        See @ref image_handlers for a list of the available handlers.
+
+        Typical example of use:
+        @code
+            wxImage::AddHandler(new wxPNGHandler);
+        @endcode
+
+        See @ref image_handlers for a list of the available handlers. You can
+        also use ::wxInitAllImageHandlers() to add handlers for all the image
+        formats supported by wxWidgets at once.
+
+        @param handler
+            A heap-allocated handler object which will be deleted by wxImage
+            if it is removed later by RemoveHandler() or at program shutdown.

     */
     static void AddHandler(wxImageHandler* handler);
 
     */
     static void AddHandler(wxImageHandler* handler);
 


@@ -1627,7 +1686,8 @@ public:
 
     /**
         Finds the handler with the given name, and removes it.
 
     /**
         Finds the handler with the given name, and removes it.

-        The handler is not deleted.
+
+        The handler is also deleted.

 
         @param name
             The handler name.
 
         @param name
             The handler name.


@@ -1739,9 +1799,14 @@ wxImage wxNullImage;
 //@{
 
 /**
 //@{
 
 /**

-    Initializes all available image handlers. For a list of available handlers,
-    see wxImage.
-    If you don't need/want all image handlers loaded
+    Initializes all available image handlers.
+
+    This function calls wxImage::AddHandler() for all the available image
+    handlers (see @ref image_handlers for the full list). Calling it is the
+    simplest way to initialize wxImage but it creates and registers even the
+    handlers your program may not use. If you want to avoid the overhead of
+    doing this you need to call wxImage::AddHandler() manually just for the
+    handlers that you do want to use.

 
     @see wxImage, wxImageHandler
 
 
     @see wxImage, wxImageHandler