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livetrax/libs/gtkmm2/gdk/gdkmm/pixbuf.h
Taybin Rutkin 76450f35b1 Upgraded gtkmm to gtkmm-2.10.7. 
git-svn-id: svn://localhost/ardour2/branches/2.1-staging@1416 d708f5d6-7413-0410-9779-e7cbd77b26cf
2007-02-03 04:14:20 +00:00

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// -*- c++ -*-
// Generated by gtkmmproc -- DO NOT MODIFY!
#ifndef _GDKMM_PIXBUF_H
#define _GDKMM_PIXBUF_H
#include <glibmm.h>
/* $Id$ */
/* Copyright (C) 1998-2002 The gtkmm Development Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <gdkmm/drawable.h>
#include <gdkmm/image.h>
#include <gdkmm/pixmap.h>
#include <gdkmm/bitmap.h>
#include <gdkmm/pixbufformat.h>
#include <gdkmm/types.h>
#ifndef DOXYGEN_SHOULD_SKIP_THIS
typedef struct _GdkPixbuf GdkPixbuf;
typedef struct _GdkPixbufClass GdkPixbufClass;
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
namespace Gdk
{ class Pixbuf_Class; } // namespace Gdk
namespace Gdk
{
/** @addtogroup gdkmmEnums Enums and Flags */
/**
* @ingroup gdkmmEnums
*/
enum Colorspace
{
COLORSPACE_RGB
};
} // namespace Gdk
#ifndef DOXYGEN_SHOULD_SKIP_THIS
namespace Glib
{
template <>
class Value<Gdk::Colorspace> : public Glib::Value_Enum<Gdk::Colorspace>
{
public:
static GType value_type() G_GNUC_CONST;
};
} // namespace Glib
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
namespace Gdk
{
/**
* @ingroup gdkmmEnums
*/
enum InterpType
{
INTERP_NEAREST,
INTERP_TILES,
INTERP_BILINEAR,
INTERP_HYPER
};
} // namespace Gdk
#ifndef DOXYGEN_SHOULD_SKIP_THIS
namespace Glib
{
template <>
class Value<Gdk::InterpType> : public Glib::Value_Enum<Gdk::InterpType>
{
public:
static GType value_type() G_GNUC_CONST;
};
} // namespace Glib
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
namespace Gdk
{
/**
* @ingroup gdkmmEnums
*/
enum PixbufAlphaMode
{
PIXBUF_ALPHA_BILEVEL,
PIXBUF_ALPHA_FULL
};
} // namespace Gdk
#ifndef DOXYGEN_SHOULD_SKIP_THIS
namespace Glib
{
template <>
class Value<Gdk::PixbufAlphaMode> : public Glib::Value_Enum<Gdk::PixbufAlphaMode>
{
public:
static GType value_type() G_GNUC_CONST;
};
} // namespace Glib
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
namespace Gdk
{
/**
* @ingroup gdkmmEnums
*/
enum PixbufRotation
{
PIXBUF_ROTATE_NONE = 0,
PIXBUF_ROTATE_COUNTERCLOCKWISE = 90,
PIXBUF_ROTATE_UPSIDEDOWN = 180,
PIXBUF_ROTATE_CLOCKWISE = 270
};
} // namespace Gdk
#ifndef DOXYGEN_SHOULD_SKIP_THIS
namespace Glib
{
template <>
class Value<Gdk::PixbufRotation> : public Glib::Value_Enum<Gdk::PixbufRotation>
{
public:
static GType value_type() G_GNUC_CONST;
};
} // namespace Glib
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
namespace Gdk
{
/** Exception class for Gdk::Pixbuf errors.
*/
class PixbufError : public Glib::Error
{
public:
enum Code
{
CORRUPT_IMAGE,
INSUFFICIENT_MEMORY,
BAD_OPTION,
UNKNOWN_TYPE,
UNSUPPORTED_OPERATION,
FAILED
};
PixbufError(Code error_code, const Glib::ustring& error_message);
explicit PixbufError(GError* gobject);
Code code() const;
#ifndef DOXYGEN_SHOULD_SKIP_THIS
private:
#ifdef GLIBMM_EXCEPTIONS_ENABLED
static void throw_func(GError* gobject);
#else
//When not using exceptions, we just pass the Exception object around without throwing it:
static std::auto_ptr<Glib::Error> throw_func(GError* gobject);
#endif //GLIBMM_EXCEPTIONS_ENABLED
friend void wrap_init(); // uses throw_func()
#endif
};
} // namespace Gdk
#ifndef DOXYGEN_SHOULD_SKIP_THIS
namespace Glib
{
template <>
class Value<Gdk::PixbufError::Code> : public Glib::Value_Enum<Gdk::PixbufError::Code>
{
public:
static GType value_type() G_GNUC_CONST;
};
} // namespace Glib
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
namespace Gdk
{
#ifndef DOXYGEN_SHOULD_SKIP_THIS
struct PixbufFormatTraits
{
typedef PixbufFormat CppType;
typedef const GdkPixbufFormat* CType;
typedef GdkPixbufFormat* CTypeNonConst;
static CType to_c_type (const CppType& obj) { return obj.gobj(); }
static CType to_c_type (CType ptr) { return ptr; }
static CppType to_cpp_type (CType ptr) { return PixbufFormat(ptr); /* Does not take ownership */ }
static void release_c_type (CType /* ptr */) { /* Doesn't happen */ }
};
#endif //DOXYGEN_SHOULD_SKIP_THIS
class Pixbuf : public Glib::Object
{
#ifndef DOXYGEN_SHOULD_SKIP_THIS
public:
typedef Pixbuf CppObjectType;
typedef Pixbuf_Class CppClassType;
typedef GdkPixbuf BaseObjectType;
typedef GdkPixbufClass BaseClassType;
private: friend class Pixbuf_Class;
static CppClassType pixbuf_class_;
private:
// noncopyable
Pixbuf(const Pixbuf&);
Pixbuf& operator=(const Pixbuf&);
protected:
explicit Pixbuf(const Glib::ConstructParams& construct_params);
explicit Pixbuf(GdkPixbuf* castitem);
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
public:
virtual ~Pixbuf();
#ifndef DOXYGEN_SHOULD_SKIP_THIS
static GType get_type() G_GNUC_CONST;
static GType get_base_type() G_GNUC_CONST;
#endif
///Provides access to the underlying C GObject.
GdkPixbuf* gobj() { return reinterpret_cast<GdkPixbuf*>(gobject_); }
///Provides access to the underlying C GObject.
const GdkPixbuf* gobj() const { return reinterpret_cast<GdkPixbuf*>(gobject_); }
///Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
GdkPixbuf* gobj_copy();
private:
protected:
//TODO: Document these, based on the docs for the C functions.
Pixbuf(const Glib::RefPtr<Drawable>& src, const Glib::RefPtr<Colormap>& cmap,
int src_x, int src_y, int dest_x, int dest_y, int width, int height);
Pixbuf(const Glib::RefPtr<Image>& src, const Glib::RefPtr<Colormap>& cmap,
int src_x, int src_y, int dest_x, int dest_y, int width, int height);
public:
typedef sigc::slot<void, const guint8*> SlotDestroyData;
static Glib::RefPtr<Pixbuf> create(const Glib::RefPtr<Drawable>& src, const Glib::RefPtr<Colormap>& cmap, int src_x, int src_y, int dest_x, int dest_y, int width, int height);
static Glib::RefPtr<Pixbuf> create(const Glib::RefPtr<Image>& src, const Glib::RefPtr<Colormap>& cmap, int src_x, int src_y, int dest_x, int dest_y, int width, int height);
/** Creates a new Gdk::Pixbuf with a copy of the information in the specified
* @a pixbuf .
* @return A newly-created pixbuf with a reference count of 1, or <tt>0</tt> if
* not enough memory could be allocated.
*/
Glib::RefPtr<Pixbuf> copy() const;
/** Creates a new Gdk::Pixbuf structure and allocates a buffer for it. The
* buffer has an optimal rowstride. Note that the buffer is not cleared;
* you will have to fill it completely yourself.
* @param colorspace Color space for image.
* @param has_alpha Whether the image should have transparency information.
* @param bits_per_sample Number of bits per color sample.
* @param width Width of image in pixels.
* @param height Height of image in pixels.
* @return A newly-created Gdk::Pixbuf with a reference count of 1, or
* <tt>0</tt> if not enough memory could be allocated for the image buffer.
*/
static Glib::RefPtr<Pixbuf> create(
Colorspace colorspace, bool has_alpha,
int bits_per_sample, int width, int height);
/** Creates a new pixbuf which represents a sub-region of
* @a src_pixbuf . The new pixbuf shares its pixels with the
* original pixbuf, so writing to one affects both.
* The new pixbuf holds a reference to @a src_pixbuf , so
* @a src_pixbuf will not be finalized until the new pixbuf
* is finalized.
* @param src_pixbuf A Gdk::Pixbuf.
* @param src_x X coord in @a src_pixbuf .
* @param src_y Y coord in @a src_pixbuf .
* @param width Width of region in @a src_pixbuf .
* @param height Height of region in @a src_pixbuf .
* @return A new pixbuf.
*/
static Glib::RefPtr<Pixbuf> create_subpixbuf(
const Glib::RefPtr<Pixbuf>& src_pixbuf,
int src_x, int src_y, int width, int height);
/** Creates a new pixbuf by loading an image from a file. The file format is detected automatically.
* @param filename The path to the pixbuf file.
*
* @throw Glib::FileError
* @throw Gdk::PixbufError
*/
/** Creates a new pixbuf by loading an image from a file. The file format is
* detected automatically. If <tt>0</tt> is returned, then @a error will be set.
* Possible errors are in the Gdk::PIXBUF_ERROR and G::FILE_ERROR domains.
* @param filename Name of file to load, in the GLib file name encoding.
* @param error Return location for an error.
* @return A newly-created pixbuf with a reference count of 1, or <tt>0</tt> if
* any of several error conditions occurred: the file could not be opened,
* there was no loader for the file's format, there was not enough memory to
* allocate the image buffer, or the image file contained invalid data.
*/
#ifdef GLIBMM_EXCEPTIONS_ENABLED
static Glib::RefPtr<Pixbuf> create_from_file(const std::string& filename);
#else
static Glib::RefPtr<Pixbuf> create_from_file(const std::string& filename, std::auto_ptr<Glib::Error>& error);
#endif //GLIBMM_EXCEPTIONS_ENABLED
/** Creates a new pixbuf by loading an image from a file. The file format is detected automatically.
* The image will be scaled to fit in the requested size.
* @param filename The path to the pixbuf file.
* @param width The desired width
* @param height The desired height
* @param preserve_aspect_ratio: Whether the image's aspect ratio will be preserved when scaling.
*
* @throw Glib::FileError
* @throw Gdk::PixbufError
*/
/** Creates a new pixbuf by loading an image from a file. The file format is
* detected automatically. If <tt>0</tt> is returned, then @a error will be set.
* Possible errors are in the Gdk::PIXBUF_ERROR and G::FILE_ERROR domains.
* The image will be scaled to fit in the requested size, optionally preserving
* the image's aspect ratio.
*
* When preserving the aspect ratio, a @a width of -1 will cause the image
* to be scaled to the exact given height, and a @a height of -1 will cause
* the image to be scaled to the exact given width. When not preserving
* aspect ratio, a @a width or @a height of -1 means to not scale the image
* at all in that dimension. Negative values for @a width and @a height are
* allowed since 2.8.
* @param filename Name of file to load, in the GLib file name encoding.
* @param width The width the image should have or -1 to not constrain the width.
* @param height The height the image should have or -1 to not constrain the height.
* @param preserve_aspect_ratio <tt>true</tt> to preserve the image's aspect ratio.
* @param error Return location for an error.
* @return A newly-created pixbuf with a reference count of 1, or <tt>0</tt>
* if any of several error conditions occurred: the file could not be opened,
* there was no loader for the file's format, there was not enough memory to
* allocate the image buffer, or the image file contained invalid data.
*
* @newin2p6.
*/
#ifdef GLIBMM_EXCEPTIONS_ENABLED
static Glib::RefPtr<Pixbuf> create_from_file(const std::string& filename, int width, int height, bool preserve_aspect_ratio = true);
#else
static Glib::RefPtr<Pixbuf> create_from_file(const std::string& filename, int width, int height, bool preserve_aspect_ratio, std::auto_ptr<Glib::Error>& error);
#endif //GLIBMM_EXCEPTIONS_ENABLED
//gdk_pixbuf_new_from_file_at_size() just calls gdk_pixbuf_new_from_file_at_scale().
/** Creates a new Gdk::Pixbuf out of in-memory image data.
* Currently only RGB images with 8 bits per sample are supported.
*
* @param data %Image data in 8-bit/sample packed format.
* @param colorspace Colorspace for the image data.
* @param has_alpha Whether the data has an opacity channel.
* @param bits_per_sample Number of bits per sample.
* @param width Width of the image in pixels.
* @param height Height of the image in pixels.
* @param rowstride Distance in bytes between rows.
* @return A newly-created Gdk::Pixbuf object.
*/
static Glib::RefPtr<Pixbuf> create_from_data(const guint8* data, Colorspace colorspace,
bool has_alpha, int bits_per_sample,
int width, int height, int rowstride);
/** Creates a new Gdk::Pixbuf out of in-memory image data.
* Currently only RGB images with 8 bits per sample are supported.
*
* @param data %Image data in 8-bit/sample packed format.
* @param colorspace Colorspace for the image data.
* @param has_alpha Whether the data has an opacity channel.
* @param bits_per_sample Number of bits per sample.
* @param width Width of the image in pixels.
* @param height Height of the image in pixels.
* @param rowstride Distance in bytes between rows.
* @param destroy_slot Slot used to free the data when the pixbuf's
* reference count drops to zero.
* @return A newly-created Gdk::Pixbuf object.
*/
static Glib::RefPtr<Pixbuf> create_from_data(const guint8* data, Colorspace colorspace,
bool has_alpha, int bits_per_sample,
int width, int height, int rowstride,
const SlotDestroyData& destroy_slot);
/** Creates a new pixbuf by parsing XPM data in memory. This data is commonly
* the result of including an XPM file into a program's C source.
* @param data Pointer to inline XPM data.
* @return A newly-created pixbuf with a reference count of 1.
*/
static Glib::RefPtr<Pixbuf> create_from_xpm_data(const char *const * data);
/** Create a Gdk::Pixbuf from a flat representation that is suitable for
* storing as inline data in a program. This is useful if you want to ship a
* program with images, but don't want to depend on any external files.
*
* GTK+ ships with a program called <tt>gdk-pixbuf-csource</tt> which allows
* for conversion of GdkPixbufs into such a inline representation. In almost
* all cases, you should pass the <tt>--raw</tt> flag to
* <tt>gdk-pixbuf-csource</tt>. A sample invocation would be:
*
* <tt>gdk-pixbuf-csource --raw --name=myimage_inline myimage.png</tt>
*
* For the typical case where the inline pixbuf is read-only static data, you
* don't need to copy the pixel data unless you intend to write to it, so you
* can pass <tt>false</tt> for @a copy_pixels. (If you pass <tt>--rle</tt> to
* <tt>gdk-pixbuf-csource</tt>, a copy will be made even if @a copy_pixels is
* <tt>false</tt>, so using this option is generally a bad idea.)
*
* If you create a pixbuf from const inline data compiled into your program,
* it's probably safe to ignore errors, since things will always succeed. For
* non-const inline data, you could get out of memory. For untrusted inline
* data located at runtime, you could have corrupt inline data in addition.
*
* @param data_length Length in bytes of the @a data argument.
* @param data Byte data containing a serialized GdkPixdata structure.
* @param copy_pixels Whether to copy the pixel data, or use direct pointers
* to @a data for the resulting pixbuf.
* @throw Gdk::PixbufError
*/
/** Create a Gdk::Pixbuf from a flat representation that is suitable for
* storing as inline data in a program. This is useful if you want to
* ship a program with images, but don't want to depend on any
* external files.
*
* GTK+ ships with a program called &lt;command&gt;gdk-pixbuf-csource&lt;/command&gt;
* which allows for conversion of Gdk::Pixbufs into such a inline representation.
* In almost all cases, you should pass the &lt;option&gt;--raw&lt;/option&gt; flag to
* &lt;command&gt;gdk-pixbuf-csource&lt;/command&gt;. A sample invocation would be:
*
* @code
* gdk-pixbuf-csource --raw --name=myimage_inline myimage.png
* @endcode
*
* For the typical case where the inline pixbuf is read-only static data,
* you don't need to copy the pixel data unless you intend to write to
* it, so you can pass <tt>false</tt> for @a copy_pixels . (If you pass
* &lt;option&gt;--rle&lt;/option&gt; to &lt;command&gt;gdk-pixbuf-csource&lt;/command&gt;, a copy
* will be made even if @a copy_pixels is <tt>false</tt>, so using this option is
* generally a bad idea.)
*
* If you create a pixbuf from const inline data compiled into your
* program, it's probably safe to ignore errors and disable length checks,
* since things will always succeed:
* @code
* pixbuf = gdk_pixbuf_new_from_inline (-1, myimage_inline, <tt>false</tt>, <tt>0</tt>);
* @endcode
*
* For non-const inline data, you could get out of memory. For untrusted
* inline data located at runtime, you could have corrupt inline data in
* addition.
* @param data_length Length in bytes of the @a data argument or -1 to
* disable length checks.
* @param data Byte data containing a serialized Gdk::Pixdata structure.
* @param copy_pixels Whether to copy the pixel data, or use direct pointers
* @a data for the resulting pixbuf.
* @param error G::Error return location, may be <tt>0</tt> to ignore errors.
* @return A newly-created Gdk::Pixbuf structure with a reference,
* count of 1, or <tt>0</tt> if an error occurred.
*/
#ifdef GLIBMM_EXCEPTIONS_ENABLED
static Glib::RefPtr<Pixbuf> create_from_inline(int data_length, const guint8* data,
bool copy_pixels = false);
#else
static Glib::RefPtr<Pixbuf> create_from_inline(int data_length, const guint8* data, bool copy_pixels, std::auto_ptr<Glib::Error>& error);
#endif //GLIBMM_EXCEPTIONS_ENABLED
/** Queries the color space of a pixbuf.
* @return Color space.
*/
Colorspace get_colorspace() const;
/** Queries the number of channels of a pixbuf.
* @return Number of channels.
*/
int get_n_channels() const;
/** Queries whether a pixbuf has an alpha channel (opacity information).
* @return <tt>true</tt> if it has an alpha channel, <tt>false</tt> otherwise.
*/
bool get_has_alpha() const;
/** Queries the number of bits per color sample in a pixbuf.
* @return Number of bits per color sample.
*/
int get_bits_per_sample() const;
/** Queries a pointer to the pixel data of a pixbuf.
* @return A pointer to the pixbuf's pixel data. Please see &lt;xref linkend="image-data"/&gt;
* for information about how the pixel data is stored in
* memory.
*/
guint8* get_pixels() const;
/** Queries the width of a pixbuf.
* @return Width in pixels.
*/
int get_width() const;
/** Queries the height of a pixbuf.
* @return Height in pixels.
*/
int get_height() const;
/** Queries the rowstride of a pixbuf, which is the number of bytes between the start of a row
* and the start of the next row.
* @return Distance between row starts.
*/
int get_rowstride() const;
/** Clears a pixbuf to the given RGBA value, converting the RGBA value into
* the pixbuf's pixel format. The alpha will be ignored if the pixbuf
* doesn't have an alpha channel.
* @param pixel RGBA pixel to clear to
* (0xffffffff is opaque white, 0x00000000 transparent black).
*/
void fill(guint32 pixel);
/** Saves pixbuf to a file in format @a type.
* By default, "jpeg", "png", "ico" and "bmp" are possible file formats to save in, but more formats may be installed.
* TThe list of all writable formats can be determined by using Gdk::Pixbuf::get_formats() with
* Gdk::PixbufFormat::is_writable().
*
* @param filename The path of the file to be created.
* @param type The file type.
*
* @throw Glib::FileError
* @throw Gdk::PixbufError
*/
#ifdef GLIBMM_EXCEPTIONS_ENABLED
void save(const std::string& filename, const Glib::ustring& type);
#else
void save(const std::string& filename, const Glib::ustring& type, std::auto_ptr<Glib::Error>& error);
#endif //GLIBMM_EXCEPTIONS_ENABLED
/** Saves pixbuf to a file in format @a type.
* By default, "jpeg", "png", "ico" and "bmp" are possible file formats to save in, but more formats may be installed.
* TThe list of all writable formats can be determined by using Gdk::Pixbuf::get_formats() with
* Gdk::PixbufFormat::is_writable().
*
* The @a option_keys and @option_values, if not empty, should contain pairs of strings that modify the save parameters.
* For example, "quality", "100".
*
* Currently only a few parameters exist. JPEG images can be saved with a "quality" parameter;
* its value should be in the range [0,100]. Text chunks can be attached to PNG images by specifying parameters of the
* form "tEXt::key", where key is an ASCII string of length 1-79. The values are UTF-8 encoded strings. ICO images can be
* saved in depth 16, 24, or 32, by using the "depth" parameter. When the ICO saver is given "x_hot" and "y_hot"
* parameters, it produces a CUR instead of an ICO.
*
* @param filename The path of the file to be created.
* @param type The file type.
* @param option_keys
* @param option_values
*
* @throw Glib::FileError
* @throw Gdk::PixbufError
*/
#ifdef GLIBMM_EXCEPTIONS_ENABLED
void save(const std::string& filename, const Glib::ustring& type,
const Glib::StringArrayHandle& option_keys,
const Glib::StringArrayHandle& option_values);
#else
void save(const std::string& filename, const Glib::ustring& type,
const Glib::StringArrayHandle& option_keys,
const Glib::StringArrayHandle& option_values, std::auto_ptr<Glib::Error>& error);
#endif //GLIBMM_EXCEPTIONS_ENABLED
/* TODO:
typedef gboolean (*GdkPixbufSaveFunc) (const gchar *buf,
gsize count,
GError **error,
gpointer data);
gboolean gdk_pixbuf_save_to_callback (GdkPixbuf *pixbuf,
GdkPixbufSaveFunc save_func,
gpointer user_data,
const char *type,
GError **error,
...);
gboolean gdk_pixbuf_save_to_callbackv (GdkPixbuf *pixbuf,
GdkPixbufSaveFunc save_func,
gpointer user_data,
const char *type,
char **option_keys,
char **option_values,
GError **error);
*/
/* Saves the pixbuf to a new buffer in format @a type.
* Note that the buffer is not nul-terminated and may contain embedded nulls.
* @see save().
*
* @param buffer This will be set to the address of a new buffer.
* @param size This will be set to the size of the @a buffer.
* @param type Currently "jpeg", "png", "ico" or "bmp".
*
* @throw Glib::FileError
* @throw Gdk::PixbufError
*/
#ifdef GLIBMM_EXCEPTIONS_ENABLED
void save_to_buffer(gchar*& buffer, gsize& buffer_size,
const Glib::ustring& type = "png");
#else
void save_to_buffer(gchar*& buffer, gsize& buffer_size,
const Glib::ustring& type, std::auto_ptr<Glib::Error>& error);
#endif //GLIBMM_EXCEPTIONS_ENABLED
/* Saves the pixbuf to a new buffer in format @a type.
* Note that the buffer is not nul-terminated and may contain embedded nulls.
* @see save().
*
* @param buffer This will be set to the address of a new buffer.
* @param size This will be set to the size of the @a buffer.
* @param type Currently "jpeg", "png", "ico" or "bmp".
*
* @throw Glib::FileError
* @throw Gdk::PixbufError
*/
#ifdef GLIBMM_EXCEPTIONS_ENABLED
void save_to_buffer(gchar*& buffer, gsize& buffer_size,
const Glib::ustring& type,
const Glib::StringArrayHandle& option_keys,
const Glib::StringArrayHandle& option_values);
#else
void save_to_buffer(gchar*& buffer, gsize& buffer_size,
const Glib::ustring& type,
const Glib::StringArrayHandle& option_keys,
const Glib::StringArrayHandle& option_values, std::auto_ptr<Glib::Error>& error);
#endif //GLIBMM_EXCEPTIONS_ENABLED
/** Takes an existing pixbuf and adds an alpha channel to it.
* If the existing pixbuf already had an alpha channel, the channel
* values are copied from the original; otherwise, the alpha channel
* is initialized to 255 (full opacity).
*
* If @a substitute_color is <tt>true</tt>, then the color specified by ( @a r , @a g , @a b ) will be
* assigned zero opacity. That is, if you pass (255, 255, 255) for the
* substitute color, all white pixels will become fully transparent.
* @param substitute_color Whether to set a color to zero opacity. If this
* is <tt>false</tt>, then the ( @a r , @a g , @a b ) arguments will be ignored.
* @param r Red value to substitute.
* @param g Green value to substitute.
* @param b Blue value to substitute.
* @return A newly-created pixbuf with a reference count of 1.
*/
Glib::RefPtr<Gdk::Pixbuf> add_alpha(
bool substitute_color, guint8 r, guint8 g, guint8 b) const;
/** Copies a rectangular area from @a src_pixbuf to @a dest_pixbuf . Conversion of
* pixbuf formats is done automatically.
* @param src_x Source X coordinate within @a src_pixbuf .
* @param src_y Source Y coordinate within @a src_pixbuf .
* @param width Width of the area to copy.
* @param height Height of the area to copy.
* @param dest_pixbuf Destination pixbuf.
* @param dest_x X coordinate within @a dest_pixbuf .
* @param dest_y Y coordinate within @a dest_pixbuf .
*/
void copy_area(
int src_x, int src_y, int width, int height,
const Glib::RefPtr<Gdk::Pixbuf>& dest_pixbuf,
int dest_x, int dest_y) const;
/** Modifies saturation and optionally pixelates @a src , placing the
* result in @a dest . @a src and @a dest may be the same pixbuf with no ill
* effects. If @a saturation is 1.0 then saturation is not changed. If
* it's less than 1.0, saturation is reduced (the image is darkened);
* if greater than 1.0, saturation is increased (the image is
* brightened). If @a pixelate is <tt>true</tt>, then pixels are faded in a
* checkerboard pattern to create a pixelated image. @a src and @a dest
* must have the same image format, size, and rowstride.
* @param dest Place to write modified version of @a src .
* @param saturation Saturation factor.
* @param pixelate Whether to pixelate.
*/
void saturate_and_pixelate(
const Glib::RefPtr<Gdk::Pixbuf>& dest,
float saturation, bool pixelate) const;
/** Creates a transformation of the source image @a src by scaling by
* @a scale_x and @a scale_y then translating by @a offset_x and @a offset_y ,
* then renders the rectangle ( @a dest_x , @a dest_y , @a dest_width ,
* @a dest_height ) of the resulting image onto the destination image
* replacing the previous contents.
*
* Try to use scale_simple() first, this function is
* the industrial-strength power tool you can fall back to if
* scale_simple() isn't powerful enough.
* @param dest The Gdk::Pixbuf into which to render the results.
* @param dest_x The left coordinate for region to render.
* @param dest_y The top coordinate for region to render.
* @param dest_width The width of the region to render.
* @param dest_height The height of the region to render.
* @param offset_x The offset in the X direction (currently rounded to an integer).
* @param offset_y The offset in the Y direction (currently rounded to an integer).
* @param scale_x The scale factor in the X direction.
* @param scale_y The scale factor in the Y direction.
* @param interp_type The interpolation type for the transformation.
*/
void scale(const Glib::RefPtr<Gdk::Pixbuf>& dest,
int dest_x, int dest_y,
int dest_width, int dest_height,
double offset_x, double offset_y,
double scale_x, double scale_y,
InterpType interp_type) const;
/** Creates a transformation of the source image @a src by scaling by
* @a scale_x and @a scale_y then translating by @a offset_x and @a offset_y .
* This gives an image in the coordinates of the destination pixbuf.
* The rectangle ( @a dest_x , @a dest_y , @a dest_width , @a dest_height )
* is then composited onto the corresponding rectangle of the
* original destination image.
*
* When the destination rectangle contains parts not in the source
* image, the data at the edges of the source image is replicated
* to infinity.
*
* &lt;figure id="pixbuf-composite-diagram"&gt;
* &lt;title&gt;Compositing of pixbufs&lt;/title&gt;
* &lt;graphic fileref="composite.png" format="PNG"/&gt;
* &lt;/figure&gt;
* @param dest The Gdk::Pixbuf into which to render the results.
* @param dest_x The left coordinate for region to render.
* @param dest_y The top coordinate for region to render.
* @param dest_width The width of the region to render.
* @param dest_height The height of the region to render.
* @param offset_x The offset in the X direction (currently rounded to an integer).
* @param offset_y The offset in the Y direction (currently rounded to an integer).
* @param scale_x The scale factor in the X direction.
* @param scale_y The scale factor in the Y direction.
* @param interp_type The interpolation type for the transformation.
* @param overall_alpha Overall alpha for source image (0..255).
*/
void composite(const Glib::RefPtr<Gdk::Pixbuf>& dest,
int dest_x, int dest_y,
int dest_width, int dest_height,
double offset_x, double offset_y,
double scale_x, double scale_y,
InterpType interp_type,
int overall_alpha) const;
/** Creates a transformation of the source image @a src by scaling by
* @a scale_x and @a scale_y then translating by @a offset_x and @a offset_y ,
* then composites the rectangle ( @a dest_x , @a dest_y , @a dest_width ,
* @a dest_height ) of the resulting image with a checkboard of the
* colors @a color1 and @a color2 and renders it onto the destination
* image.
*
* See composite_color_simple() for a simpler variant of this
* function suitable for many tasks.
* @param dest The Gdk::Pixbuf into which to render the results.
* @param dest_x The left coordinate for region to render.
* @param dest_y The top coordinate for region to render.
* @param dest_width The width of the region to render.
* @param dest_height The height of the region to render.
* @param offset_x The offset in the X direction (currently rounded to an integer).
* @param offset_y The offset in the Y direction (currently rounded to an integer).
* @param scale_x The scale factor in the X direction.
* @param scale_y The scale factor in the Y direction.
* @param interp_type The interpolation type for the transformation.
* @param overall_alpha Overall alpha for source image (0..255).
* @param check_x The X offset for the checkboard (origin of checkboard is at - @a check_x , - @a check_y ).
* @param check_y The Y offset for the checkboard.
* @param check_size The size of checks in the checkboard (must be a power of two).
* @param color1 The color of check at upper left.
* @param color2 The color of the other check.
*/
void composite_color(const Glib::RefPtr<Gdk::Pixbuf>& dest,
int dest_x, int dest_y,
int dest_width, int dest_height,
double offset_x, double offset_y,
double scale_x, double scale_y,
InterpType interp_type,
int overall_alpha,
int check_x, int check_y,
int check_size,
guint32 color1, guint32 color2) const;
/** Create a new Gdk::Pixbuf containing a copy of @a src scaled to
* @a dest_width x @a dest_height . Leaves @a src unaffected. @a interp_type
* should be Gdk::INTERP_NEAREST if you want maximum speed (but when
* scaling down Gdk::INTERP_NEAREST is usually unusably ugly). The
* default @a interp_type should be Gdk::INTERP_BILINEAR which offers
* reasonable quality and speed.
*
* You can scale a sub-portion of @a src by creating a sub-pixbuf
* pointing into @a src ; see new_subpixbuf().
*
* For more complicated scaling/compositing see scale()
* and composite().
* @param dest_width The width of destination image.
* @param dest_height The height of destination image.
* @param interp_type The interpolation type for the transformation.
* @return The new Gdk::Pixbuf, or <tt>0</tt> if not enough memory could be
* allocated for it.
*/
Glib::RefPtr<Gdk::Pixbuf> scale_simple(
int dest_width, int dest_height,
InterpType interp_type) const;
/** Creates a new Gdk::Pixbuf by scaling @a src to @a dest_width x
* @a dest_height and compositing the result with a checkboard of colors
* @a color1 and @a color2 .
* @param dest_width The width of destination image.
* @param dest_height The height of destination image.
* @param interp_type The interpolation type for the transformation.
* @param overall_alpha Overall alpha for source image (0..255).
* @param check_size The size of checks in the checkboard (must be a power of two).
* @param color1 The color of check at upper left.
* @param color2 The color of the other check.
* @return The new Gdk::Pixbuf, or <tt>0</tt> if not enough memory could be
* allocated for it.
*/
Glib::RefPtr<Gdk::Pixbuf> composite_color_simple(
int dest_width, int dest_height,
InterpType interp_type,
int overall_alpha, int check_size,
guint32 color1, guint32 color2) const;
/** Rotates a pixbuf by a multiple of 90 degrees, and returns the
* result in a new pixbuf.
* @param angle The angle to rotate by.
* @return A new pixbuf
*
* @newin2p6.
*/
Glib::RefPtr<Gdk::Pixbuf> rotate_simple(PixbufRotation angle) const;
/** Flips a pixbuf horizontally or vertically and returns the
* result in a new pixbuf.
* @param horizontal <tt>true</tt> to flip horizontally, <tt>false</tt> to flip vertically.
* @return A new pixbuf.
*
* @newin2p6.
*/
Glib::RefPtr<Gdk::Pixbuf> flip(bool horizontal = true) const;
/** Takes the opacity values in a rectangular portion of a pixbuf and thresholds
* them to produce a bi-level alpha mask that can be used as a clipping mask for
* a drawable.
* @param bitmap Bitmap where the bilevel mask will be painted to.
* @param src_x Source X coordinate.
* @param src_y Source Y coordinate.
* @param dest_x Destination X coordinate.
* @param dest_y Destination Y coordinate.
* @param width Width of region to threshold, or -1 to use pixbuf width.
* @param height Height of region to threshold, or -1 to use pixbuf height.
* @param alpha_threshold Opacity values below this will be painted as zero; all
* other values will be painted as one.
*/
void render_threshold_alpha(const Glib::RefPtr<Gdk::Bitmap>& bitmap,
int src_x, int src_y,
int dest_x, int dest_y,
int width, int height,
int alpha_threshold);
/** Renders a rectangular portion of a pixbuf to a drawable while using the
* specified GC. This is done using GdkRGB, so the specified drawable must have
* the GdkRGB visual and colormap. Note that this function will ignore the
* opacity information for images with an alpha channel; the GC must already
* have the clipping mask set if you want transparent regions to show through.
*
* For an explanation of dither offsets, see the GdkRGB documentation. In
* brief, the dither offset is important when re-rendering partial regions of an
* image to a rendered version of the full image, or for when the offsets to a
* base position change, as in scrolling. The dither matrix has to be shifted
* for consistent visual results. If you do not have any of these cases, the
* dither offsets can be both zero.
*
* Deprecated: This function is obsolete. Use gdk_draw_pixbuf() instead.
* @param drawable Destination drawable.
* @param gc GC used for rendering.
* @param src_x Source X coordinate within pixbuf.
* @param src_y Source Y coordinate within pixbuf.
* @param dest_x Destination X coordinate within drawable.
* @param dest_y Destination Y coordinate within drawable.
* @param width Width of region to render, in pixels, or -1 to use pixbuf width.
* @param height Height of region to render, in pixels, or -1 to use pixbuf height.
* @param dither Dithering mode for GdkRGB.
* @param x_dither X offset for dither.
* @param y_dither Y offset for dither.
*/
void render_to_drawable(const Glib::RefPtr<Drawable>& drawable,
const Glib::RefPtr<Gdk::GC>& gc,
int src_x, int src_y,
int dest_x, int dest_y,
int width, int height,
RgbDither dither,
int x_dither, int y_dither);
/** Renders a rectangular portion of a pixbuf to a drawable. The destination
* drawable must have a colormap. All windows have a colormap, however, pixmaps
* only have colormap by default if they were created with a non-<tt>0</tt> window argument.
* Otherwise a colormap must be set on them with gdk_drawable_set_colormap.
*
* On older X servers, rendering pixbufs with an alpha channel involves round trips
* to the X server, and may be somewhat slow.
*
* Deprecated: This function is obsolete. Use gdk_draw_pixbuf() instead.
* @param drawable Destination drawable.
* @param src_x Source X coordinate within pixbuf.
* @param src_y Source Y coordinates within pixbuf.
* @param dest_x Destination X coordinate within drawable.
* @param dest_y Destination Y coordinate within drawable.
* @param width Width of region to render, in pixels, or -1 to use pixbuf width.
* @param height Height of region to render, in pixels, or -1 to use pixbuf height.
* @param alpha_mode Ignored. Present for backwards compatibility.
* @param alpha_threshold Ignored. Present for backwards compatibility.
* @param dither Dithering mode for GdkRGB.
* @param x_dither X offset for dither.
* @param y_dither Y offset for dither.
*/
void render_to_drawable_alpha(const Glib::RefPtr<Drawable>& drawable,
int src_x, int src_y,
int dest_x, int dest_y,
int width, int height,
PixbufAlphaMode alpha_mode,
int alpha_threshold,
RgbDither dither,
int x_dither, int y_dither);
void render_pixmap_and_mask_for_colormap(const Glib::RefPtr<Colormap>& colormap,
Glib::RefPtr<Pixmap>& pixmap_return,
Glib::RefPtr<Bitmap>& mask_return,
int alpha_threshold);
void render_pixmap_and_mask(Glib::RefPtr<Pixmap>& pixmap_return,
Glib::RefPtr<Bitmap>& mask_return, int alpha_threshold);
/** Looks up @a key in the list of options that may have been attached to the
* @a pixbuf when it was loaded.
* @param key A nul-terminated string.
* @return The value associated with @a key . This is a nul-terminated
* string that should not be freed or <tt>0</tt> if @a key was not found.
*/
Glib::ustring get_option(const Glib::ustring& key) const;
typedef Glib::SListHandle< Glib::RefPtr<PixbufFormat>, PixbufFormatTraits > SListHandle_PixbufFormat;
static SListHandle_PixbufFormat get_formats();
public:
public:
//C++ methods used to invoke GTK+ virtual functions:
#ifdef GLIBMM_VFUNCS_ENABLED
#endif //GLIBMM_VFUNCS_ENABLED
protected:
//GTK+ Virtual Functions (override these to change behaviour):
#ifdef GLIBMM_VFUNCS_ENABLED
#endif //GLIBMM_VFUNCS_ENABLED
//Default Signal Handlers::
#ifdef GLIBMM_DEFAULT_SIGNAL_HANDLERS_ENABLED
#endif //GLIBMM_DEFAULT_SIGNAL_HANDLERS_ENABLED
};
} // namespace Gdk
namespace Glib
{
/** @relates Gdk::Pixbuf
* @param object The C instance
* @param take_copy False if the result should take ownership of the C instance. True if it should take a new copy or ref.
* @result A C++ instance that wraps this C instance.
*/
Glib::RefPtr<Gdk::Pixbuf> wrap(GdkPixbuf* object, bool take_copy = false);
}
#endif /* _GDKMM_PIXBUF_H */
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