375 lines
13 KiB
C++
375 lines
13 KiB
C++
// -*- c++ -*-
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// Generated by gtkmmproc -- DO NOT MODIFY!
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#ifndef _GDKMM_PIXBUFLOADER_H
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#define _GDKMM_PIXBUFLOADER_H
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#include <glibmm.h>
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/* $Id$ */
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/* Copyright (C) 1998-2002 The gtkmm Development Team
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <glibmm/object.h>
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#include <gdkmm/pixbuf.h>
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#include <gdkmm/pixbufanimation.h>
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#include <gdkmm/pixbufformat.h>
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#ifndef DOXYGEN_SHOULD_SKIP_THIS
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typedef struct _GdkPixbufLoader GdkPixbufLoader;
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typedef struct _GdkPixbufLoaderClass GdkPixbufLoaderClass;
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#endif /* DOXYGEN_SHOULD_SKIP_THIS */
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namespace Gdk
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{ class PixbufLoader_Class; } // namespace Gdk
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namespace Gdk
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{
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class PixbufLoader : public Glib::Object
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{
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#ifndef DOXYGEN_SHOULD_SKIP_THIS
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public:
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typedef PixbufLoader CppObjectType;
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typedef PixbufLoader_Class CppClassType;
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typedef GdkPixbufLoader BaseObjectType;
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typedef GdkPixbufLoaderClass BaseClassType;
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private: friend class PixbufLoader_Class;
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static CppClassType pixbufloader_class_;
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private:
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// noncopyable
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PixbufLoader(const PixbufLoader&);
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PixbufLoader& operator=(const PixbufLoader&);
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protected:
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explicit PixbufLoader(const Glib::ConstructParams& construct_params);
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explicit PixbufLoader(GdkPixbufLoader* castitem);
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#endif /* DOXYGEN_SHOULD_SKIP_THIS */
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public:
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virtual ~PixbufLoader();
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#ifndef DOXYGEN_SHOULD_SKIP_THIS
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static GType get_type() G_GNUC_CONST;
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static GType get_base_type() G_GNUC_CONST;
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#endif
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///Provides access to the underlying C GObject.
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GdkPixbufLoader* gobj() { return reinterpret_cast<GdkPixbufLoader*>(gobject_); }
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///Provides access to the underlying C GObject.
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const GdkPixbufLoader* gobj() const { return reinterpret_cast<GdkPixbufLoader*>(gobject_); }
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///Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
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GdkPixbufLoader* gobj_copy();
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private:
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protected:
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/** Constructs a pixbuf loader object.
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*/
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PixbufLoader();
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/** Constructs a pixbuf loader object for a specific image type.
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* Constructs a new pixbuf loader object that always attempts to parse image
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* data as if it were an image of type @a image_type, instead of identifying
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* the type automatically. Useful if you want an error if the image isn't the
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* expected type, for loading image formats that can't be reliably identified
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* by looking at the data, or if the user manually forces a specific type.
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*
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* The image_type can be one of the types returned by Gdk::Pixbuf::get_formats(), or a MIME type.
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*
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* Common MIME Types are listed here
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* http://www.iana.org/assignments/media-types/
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* and here:
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* http://www.freedesktop.org/Software/shared-mime-info
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*
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* The list of non-mime-type image formats depends on what image loaders
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* are installed, but typically "png", "jpeg", "gif", "tiff" and
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* "xpm" are among the supported formats. To obtain the full list of
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* supported image formats, call PixbufFormat::get_name() on each
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* of the PixbufFormats returned by Gdk::Pixbuf::get_formats().
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*
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* @param image_type Name of the image format to be loaded with the image.
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* @param mime_type If this is true then the image_type is a MIME type.
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* @throw Gdk::PixbufError
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*/
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explicit PixbufLoader(const Glib::ustring& image_type, bool mime_type = false);
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public:
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/** Creates a new pixbuf loader object.
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* @return A newly-created pixbuf loader.
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*/
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static Glib::RefPtr<PixbufLoader> create();
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/** Constructs a pixbuf loader object for a specific image type.
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* Constructs a new pixbuf loader object that always attempts to parse image
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* data as if it were an image of type @a image_type, instead of identifying
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* the type automatically. Useful if you want an error if the image isn't the
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* expected type, for loading image formats that can't be reliably identified
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* by looking at the data, or if the user manually forces a specific type.
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*
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* The image_type can be one of the types returned by Gdk::Pixbuf::get_formats(), or a MIME type.
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*
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* Common MIME Types are listed here
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* http://www.iana.org/assignments/media-types/
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* and here:
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* http://www.freedesktop.org/Software/shared-mime-info
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*
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* The list of non-mime-type image formats depends on what image loaders
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* are installed, but typically "png", "jpeg", "gif", "tiff" and
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* "xpm" are among the supported formats. To obtain the full list of
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* supported image formats, call PixbufFormat::get_name() on each
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* of the PixbufFormats returned by Gdk::Pixbuf::get_formats().
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*
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* @param image_type Name of the image format to be loaded with the image.
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* @param mime_type If this is true then the image_type is a MIME type.
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* @throw Gdk::PixbufError
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*/
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static Glib::RefPtr<PixbufLoader> create(const Glib::ustring& image_type, bool mime_type = false);
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/** Causes the image to be scaled while it is loaded. The desired
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* image size can be determined relative to the original size of
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* the image by calling set_size() from a
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* signal handler for the ::size_prepared signal.
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*
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* Attempts to set the desired image size are ignored after the
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* emission of the ::size_prepared signal.
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*
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* @newin2p2
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* @param width The desired width of the image being loaded.
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* @param height The desired height of the image being loaded.
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*/
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void set_size(int width, int height);
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/** Causes the pixbuf loader to parse the next @a count bytes of an image.
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* It will return if the data was loaded successfully, and throw an exception
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* if an error occurred. In the latter case, the loader will be closed, and
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* will not accept further writes.
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* @param buf Pointer to image data.
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* @param count Length of the @a buf buffer in bytes.
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* @throw Gdk::PixbufError
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* @throw Glib::FileError
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*/
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/** This will cause a pixbuf loader to parse the next @a count bytes of
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* an image. It will return <tt>true</tt> if the data was loaded successfully,
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* and <tt>false</tt> if an error occurred. In the latter case, the loader
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* will be closed, and will not accept further writes. If <tt>false</tt> is
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* returned, @a error will be set to an error from the Gdk::PIXBUF_ERROR
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* or G::FILE_ERROR domains.
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* @param buf Pointer to image data.
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* @param count Length of the @a buf buffer in bytes.
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* @param error Return location for errors.
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* @return <tt>true</tt> if the write was successful, or <tt>false</tt> if the loader
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* cannot parse the buffer.
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*/
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#ifdef GLIBMM_EXCEPTIONS_ENABLED
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void write(const guint8* buf, gsize count);
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#else
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void write(const guint8* buf, gsize count, std::auto_ptr<Glib::Error>& error);
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#endif //GLIBMM_EXCEPTIONS_ENABLED
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/** Informs a pixbuf loader that no further writes with PixbufLoader::write()
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* will occur, so that it can free its internal loading structures. Also,
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* tries to parse any data that hasn't yet been parsed; if the remaining data
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* is partial or corrupt, an exception will be thrown. If you're just
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* cancelling a load rather than expecting it to be finished, writing an
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* empty <tt>catch()</tt> block to ignore errors is reasonable.
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* @throw Gdk::PixbufError
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* @throw Glib::FileError
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*/
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/** Informs a pixbuf loader that no further writes with
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* write() will occur, so that it can free its
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* internal loading structures. Also, tries to parse any data that
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* hasn't yet been parsed; if the remaining data is partial or
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* corrupt, an error will be returned. If <tt>false</tt> is returned, @a error
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* will be set to an error from the Gdk::PIXBUF_ERROR or G::FILE_ERROR
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* domains. If you're just cancelling a load rather than expecting it
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* to be finished, passing <tt>0</tt> for @a error to ignore it is
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* reasonable.
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* @param error Return location for a G::Error, or <tt>0</tt> to ignore errors.
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* @return <tt>true</tt> if all image data written so far was successfully
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* passed out via the update_area signal.
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*/
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#ifdef GLIBMM_EXCEPTIONS_ENABLED
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void close();
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#else
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void close(std::auto_ptr<Glib::Error>& error);
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#endif //GLIBMM_EXCEPTIONS_ENABLED
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/** Queries the Gdk::Pixbuf that a pixbuf loader is currently creating.
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* In general it only makes sense to call this function after the
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* "area_prepared" signal has been emitted by the loader; this means
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* that enough data has been read to know the size of the image that
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* will be allocated. If the loader has not received enough data via
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* write(), then this function returns <tt>0</tt>. The
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* returned pixbuf will be the same in all future calls to the loader,
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* so simply calling Glib::object_ref() should be sufficient to continue
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* using it. Additionally, if the loader is an animation, it will
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* return the "static image" of the animation
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* (see Gdk::PixbufAnimation::get_static_image()).
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* @return The Gdk::Pixbuf that the loader is creating, or <tt>0</tt> if not
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* enough data has been read to determine how to create the image buffer.
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*/
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Glib::RefPtr<Gdk::Pixbuf> get_pixbuf();
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/** Queries the Gdk::PixbufAnimation that a pixbuf loader is currently creating.
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* In general it only makes sense to call this function after the "area_prepared"
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* signal has been emitted by the loader. If the loader doesn't have enough
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* bytes yet (hasn't emitted the "area_prepared" signal) this function will
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* return <tt>0</tt>.
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* @return The Gdk::PixbufAnimation that the loader is loading, or <tt>0</tt> if
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* not enough data has been read to determine the information.
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*/
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Glib::RefPtr<Gdk::PixbufAnimation> get_animation();
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/** Obtains the available information about the format of the
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* currently loading image file.
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* @return A Gdk::PixbufFormat or <tt>0</tt>. The return value is owned
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* by GdkPixbuf and should not be freed.
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*
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* @newin2p2.
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*/
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PixbufFormat get_format() const;
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/** This signal is emitted when the pixbuf loader has allocated the
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* pixbuf in the desired size. After this signal is emitted,
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* applications can call get_pixbuf() to fetch
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* the partially-loaded pixbuf.
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*/
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/**
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* @par Prototype:
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* <tt>void %area_prepared()</tt>
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*/
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Glib::SignalProxy0< void > signal_area_prepared();
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/** This signal is emitted when a significant area of the image being
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* loaded has been updated. Normally it means that a complete
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* scanline has been read in, but it could be a different area as
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* well. Applications can use this signal to know when to repaint
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* areas of an image that is being loaded.
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*
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* @param X offset of upper-left corner of the updated area.
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* @param y Y offset of upper-left corner of the updated area.
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* @param width Width of updated area.
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* @param height Height of updated area.
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*/
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/**
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* @par Prototype:
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* <tt>void %area_updated(int x, int y, int width, int height)</tt>
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*/
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Glib::SignalProxy4< void,int,int,int,int > signal_area_updated();
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/** This signal is emitted when close() is called.
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* It can be used by different parts of an application to receive
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* notification when an image loader is closed by the code that
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* drives it.
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*/
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/**
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* @par Prototype:
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* <tt>void %closed()</tt>
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*/
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Glib::SignalProxy0< void > signal_closed();
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//We use no_default_handler for this, because we can not add a new vfunc to 2.5 without breaking ABI.
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//TODO: Remove no_default_handler when we do an ABI-break-with-parallel-install.
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/** This signal is emitted when the pixbuf loader has been fed the
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* initial amount of data that is required to figure out the size
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* of the image that it will create. Applications can call
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* set_size() in response to this signal to set
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* the desired size to which the image should be scaled.
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*
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* @param width The original width of the image.
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* @param height The original height of the image
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*/
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/**
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* @par Prototype:
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* <tt>void %size_prepared(int width, int height)</tt>
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*/
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Glib::SignalProxy2< void,int,int > signal_size_prepared();
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public:
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public:
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//C++ methods used to invoke GTK+ virtual functions:
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#ifdef GLIBMM_VFUNCS_ENABLED
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#endif //GLIBMM_VFUNCS_ENABLED
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protected:
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//GTK+ Virtual Functions (override these to change behaviour):
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#ifdef GLIBMM_VFUNCS_ENABLED
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#endif //GLIBMM_VFUNCS_ENABLED
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//Default Signal Handlers::
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#ifdef GLIBMM_DEFAULT_SIGNAL_HANDLERS_ENABLED
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virtual void on_area_prepared();
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virtual void on_area_updated(int x, int y, int width, int height);
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virtual void on_closed();
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#endif //GLIBMM_DEFAULT_SIGNAL_HANDLERS_ENABLED
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};
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} // namespace Gdk
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namespace Glib
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{
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/** @relates Gdk::PixbufLoader
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* @param object The C instance
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* @param take_copy False if the result should take ownership of the C instance. True if it should take a new copy or ref.
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* @result A C++ instance that wraps this C instance.
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*/
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Glib::RefPtr<Gdk::PixbufLoader> wrap(GdkPixbufLoader* object, bool take_copy = false);
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}
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#endif /* _GDKMM_PIXBUFLOADER_H */
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