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Inline data

Inline data — Functions for inlined pixbuf handling.

Includes

#include <gdk-pixbuf/gdk-pixdata.h>

Description

Using GdkPixdata, images can be compiled into an application, making it unnecessary to refer to external image files at runtime. GdkPixBuf includes a utility named gdk-pixbuf-csource, which can be used to convert image files into GdkPixdata structures suitable for inclusion in C sources. To convert the GdkPixdata structures back into GdkPixbufs, use gdk_pixbuf_from_pixdata.

GdkPixdata should not be used any more. GResource should be used to save the original compressed images inside the program's binary.

Functions

gdk_pixdata_from_pixbuf ()

gpointer
gdk_pixdata_from_pixbuf (GdkPixdata *pixdata,
                         const GdkPixbuf *pixbuf,
                         gboolean use_rle);

gdk_pixdata_from_pixbuf has been deprecated since version 2.32 and should not be used in newly-written code.

Use GResource instead.

Converts a GdkPixbuf to a GdkPixdata. If use_rle is TRUE, the pixel data is run-length encoded into newly-allocated memory and a pointer to that memory is returned.

[skip]

Parameters

pixdata

a GdkPixdata to fill.

 

pixbuf

the data to fill pixdata with.

 

use_rle

whether to use run-length encoding for the pixel data.

 

Returns

If use_rle is TRUE, a pointer to the newly-allocated memory for the run-length encoded pixel data, otherwise NULL.

[nullable]


gdk_pixbuf_from_pixdata ()

GdkPixbuf *
gdk_pixbuf_from_pixdata (const GdkPixdata *pixdata,
                         gboolean copy_pixels,
                         GError **error);

gdk_pixbuf_from_pixdata has been deprecated since version 2.32 and should not be used in newly-written code.

Use GResource instead.

Converts a GdkPixdata to a GdkPixbuf. If copy_pixels is TRUE or if the pixel data is run-length-encoded, the pixel data is copied into newly-allocated memory; otherwise it is reused.

Parameters

pixdata

a GdkPixdata to convert into a GdkPixbuf.

 

copy_pixels

whether to copy raw pixel data; run-length encoded pixel data is always copied.

 

error

location to store possible errors.

 

Returns

a new GdkPixbuf.

[transfer full]


gdk_pixdata_serialize ()

guint8 *
gdk_pixdata_serialize (const GdkPixdata *pixdata,
                       guint *stream_length_p);

gdk_pixdata_serialize has been deprecated since version 2.32 and should not be used in newly-written code.

Use GResource instead.

Serializes a GdkPixdata structure into a byte stream. The byte stream consists of a straightforward writeout of the GdkPixdata fields in network byte order, plus the pixel_data bytes the structure points to.

Parameters

pixdata

a valid GdkPixdata structure to serialize.

 

stream_length_p

location to store the resulting stream length in.

 

Returns

A newly-allocated string containing the serialized GdkPixdata structure.

[array length=stream_length_p][transfer full]


gdk_pixdata_deserialize ()

gboolean
gdk_pixdata_deserialize (GdkPixdata *pixdata,
                         guint stream_length,
                         const guint8 *stream,
                         GError **error);

gdk_pixdata_deserialize has been deprecated since version 2.32 and should not be used in newly-written code.

Use GResource instead.

Deserializes (reconstruct) a GdkPixdata structure from a byte stream. The byte stream consists of a straightforward writeout of the GdkPixdata fields in network byte order, plus the pixel_data bytes the structure points to. The pixdata contents are reconstructed byte by byte and are checked for validity. This function may fail with GDK_PIXBUF_ERROR_CORRUPT_IMAGE or GDK_PIXBUF_ERROR_UNKNOWN_TYPE.

Parameters

pixdata

a GdkPixdata structure to be filled in.

 

stream_length

length of the stream used for deserialization.

 

stream

stream of bytes containing a serialized GdkPixdata structure.

[array length=stream_length]

error

GError location to indicate failures (maybe NULL to ignore errors).

 

Returns

Upon successful deserialization TRUE is returned, FALSE otherwise.


gdk_pixdata_to_csource ()

GString *
gdk_pixdata_to_csource (GdkPixdata *pixdata,
                        const gchar *name,
                        GdkPixdataDumpType dump_type);

gdk_pixdata_to_csource has been deprecated since version 2.32 and should not be used in newly-written code.

Use GResource instead.

Generates C source code suitable for compiling images directly into programs.

gdk-pixbuf ships with a program called gdk-pixbuf-csource, which offers a command line interface to this function.

Parameters

pixdata

a GdkPixdata to convert to C source.

 

name

used for naming generated data structures or macros.

 

dump_type

a GdkPixdataDumpType determining the kind of C source to be generated.

 

Returns

a newly-allocated string containing the C source form of pixdata .

Types and Values

struct GdkPixdata

struct GdkPixdata {
  guint32 magic;        /* GDK_PIXBUF_MAGIC_NUMBER */
  gint32  length;       /* <1 to disable length checks, otherwise:
			 * GDK_PIXDATA_HEADER_LENGTH + pixel_data length
			 */
  guint32 pixdata_type; /* GdkPixdataType */
  guint32 rowstride;
  guint32 width;
  guint32 height;
  guint8 *pixel_data;
};

GdkPixdata is deprecated and should not be used in newly-written code.

A GdkPixdata contains pixbuf information in a form suitable for serialization and streaming.

Members

guint32 magic;

magic number. A valid GdkPixdata structure must have GDK_PIXBUF_MAGIC_NUMBER here.

 

gint32 length;

less than 1 to disable length checks, otherwise GDK_PIXDATA_HEADER_LENGTH + length of pixel_data .

 

guint32 pixdata_type;

information about colorspace, sample width and encoding, in a GdkPixdataType.

 

guint32 rowstride;

Distance in bytes between rows.

 

guint32 width;

Width of the image in pixels.

 

guint32 height;

Height of the image in pixels.

 

guint8 *pixel_data;

width x height pixels, encoded according to pixdata_type and rowstride .

[array][element-type guint8]

enum GdkPixdataType

GdkPixdataType is deprecated and should not be used in newly-written code.

An enumeration containing three sets of flags for a GdkPixdata struct: one for the used colorspace, one for the width of the samples and one for the encoding of the pixel data.

Members

GDK_PIXDATA_COLOR_TYPE_RGB

each pixel has red, green and blue samples.

 

GDK_PIXDATA_COLOR_TYPE_RGBA

each pixel has red, green and blue samples and an alpha value.

 

GDK_PIXDATA_COLOR_TYPE_MASK

mask for the colortype flags of the enum.

 

GDK_PIXDATA_SAMPLE_WIDTH_8

each sample has 8 bits.

 

GDK_PIXDATA_SAMPLE_WIDTH_MASK

mask for the sample width flags of the enum.

 

GDK_PIXDATA_ENCODING_RAW

the pixel data is in raw form.

 

GDK_PIXDATA_ENCODING_RLE

the pixel data is run-length encoded. Runs may be up to 127 bytes long; their length is stored in a single byte preceding the pixel data for the run. If a run is constant, its length byte has the high bit set and the pixel data consists of a single pixel which must be repeated.

 

GDK_PIXDATA_ENCODING_MASK

mask for the encoding flags of the enum.

 

enum GdkPixdataDumpType

GdkPixdataDumpType is deprecated and should not be used in newly-written code.

An enumeration which is used by gdk_pixdata_to_csource() to determine the form of C source to be generated. The three values GDK_PIXDATA_DUMP_PIXDATA_STREAM , GDK_PIXDATA_DUMP_PIXDATA_STRUCT and GDK_PIXDATA_DUMP_MACROS are mutually exclusive, as are GDK_PIXBUF_DUMP_GTYPES and GDK_PIXBUF_DUMP_CTYPES . The remaining elements are optional flags that can be freely added.

Members

GDK_PIXDATA_DUMP_PIXDATA_STREAM

Generate pixbuf data stream (a single string containing a serialized GdkPixdata structure in network byte order).

 

GDK_PIXDATA_DUMP_PIXDATA_STRUCT

Generate GdkPixdata structure (needs the GdkPixdata structure definition from gdk-pixdata.h).

 

GDK_PIXDATA_DUMP_MACROS

Generate <function>*_ROWSTRIDE</function>, <function>*_WIDTH</function>, <function>*_HEIGHT</function>, <function>*_BYTES_PER_PIXEL</function> and <function>*_RLE_PIXEL_DATA</function> or <function>*_PIXEL_DATA</function> macro definitions for the image.

 

GDK_PIXDATA_DUMP_GTYPES

Generate GLib data types instead of standard C data types.

 

GDK_PIXDATA_DUMP_CTYPES

Generate standard C data types instead of GLib data types.

 

GDK_PIXDATA_DUMP_STATIC

Generate static symbols.

 

GDK_PIXDATA_DUMP_CONST

Generate const symbols.

 

GDK_PIXDATA_DUMP_RLE_DECODER

Provide a <function>*_RUN_LENGTH_DECODE(image_buf, rle_data, size, bpp)</function> macro definition to decode run-length encoded image data.

 

GDK_PIXBUF_MAGIC_NUMBER

#define GDK_PIXBUF_MAGIC_NUMBER (0x47646b50)    /* 'GdkP' */

GDK_PIXBUF_MAGIC_NUMBER is deprecated and should not be used in newly-written code.

Magic number for GdkPixdata structures.


GDK_PIXDATA_HEADER_LENGTH

#define GDK_PIXDATA_HEADER_LENGTH (4 + 4 + 4 + 4 + 4 + 4)

GDK_PIXDATA_HEADER_LENGTH is deprecated and should not be used in newly-written code.

The length of a GdkPixdata structure without the pixel_data pointer.

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