gdk-pixbuf-transform.h File Reference

#include <glib.h>
#include <gdk-pixbuf/gdk-pixbuf-core.h>

Go to the source code of this file.

Enumerations
enum	GdkInterpType { GDK_INTERP_NEAREST , GDK_INTERP_TILES , GDK_INTERP_BILINEAR , GDK_INTERP_HYPER }
enum	GdkPixbufRotation { GDK_PIXBUF_ROTATE_NONE = 0 , GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE = 90 , GDK_PIXBUF_ROTATE_UPSIDEDOWN = 180 , GDK_PIXBUF_ROTATE_CLOCKWISE = 270 }

Functions
GDK_PIXBUF_AVAILABLE_IN_ALL void	gdk_pixbuf_scale (const GdkPixbuf *src, GdkPixbuf *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, GdkInterpType interp_type)
GDK_PIXBUF_AVAILABLE_IN_ALL void	gdk_pixbuf_composite (const GdkPixbuf *src, GdkPixbuf *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, GdkInterpType interp_type, int overall_alpha)
GDK_PIXBUF_AVAILABLE_IN_ALL void	gdk_pixbuf_composite_color (const GdkPixbuf *src, GdkPixbuf *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, GdkInterpType interp_type, int overall_alpha, int check_x, int check_y, int check_size, guint32 color1, guint32 color2)
GDK_PIXBUF_AVAILABLE_IN_ALL GdkPixbuf *	gdk_pixbuf_scale_simple (const GdkPixbuf *src, int dest_width, int dest_height, GdkInterpType interp_type)
GDK_PIXBUF_AVAILABLE_IN_ALL GdkPixbuf *	gdk_pixbuf_composite_color_simple (const GdkPixbuf *src, int dest_width, int dest_height, GdkInterpType interp_type, int overall_alpha, int check_size, guint32 color1, guint32 color2)
GDK_PIXBUF_AVAILABLE_IN_2_6 GdkPixbuf *	gdk_pixbuf_rotate_simple (const GdkPixbuf *src, GdkPixbufRotation angle)
GDK_PIXBUF_AVAILABLE_IN_2_6 GdkPixbuf *	gdk_pixbuf_flip (const GdkPixbuf *src, gboolean horizontal)

Enumeration Type Documentation

GdkInterpType

enum GdkInterpType

GdkInterpType: @GDK_INTERP_NEAREST: Nearest neighbor sampling; this is the fastest and lowest quality mode. Quality is normally unacceptable when scaling down, but may be OK when scaling up. @GDK_INTERP_TILES: This is an accurate simulation of the PostScript image operator without any interpolation enabled. Each pixel is rendered as a tiny parallelogram of solid color, the edges of which are implemented with antialiasing. It resembles nearest neighbor for enlargement, and bilinear for reduction. @GDK_INTERP_BILINEAR: Best quality/speed balance; use this mode by default. Bilinear interpolation. For enlargement, it is equivalent to point-sampling the ideal bilinear-interpolated image. For reduction, it is equivalent to laying down small tiles and integrating over the coverage area. @GDK_INTERP_HYPER: This is the slowest and highest quality reconstruction function. It is derived from the hyperbolic filters in Wolberg's "Digital Image Warping", and is formally defined as the hyperbolic-filter sampling the ideal hyperbolic-filter interpolated image (the filter is designed to be idempotent for 1:1 pixel mapping). Deprecated: this interpolation filter is deprecated, as in reality it has a lower quality than the @GDK_INTERP_BILINEAR filter (Since: 2.38)

Interpolation modes for scaling functions.

The GDK_INTERP_NEAREST mode is the fastest scaling method, but has horrible quality when scaling down; GDK_INTERP_BILINEAR is the best choice if you aren't sure what to choose, it has a good speed/quality balance.

Note: Cubic filtering is missing from the list; hyperbolic interpolation is just as fast and results in higher quality.

Enumerator
GDK_INTERP_NEAREST
GDK_INTERP_TILES
GDK_INTERP_BILINEAR
GDK_INTERP_HYPER

Definition at line 73 of file gdk-pixbuf-transform.h.

             {
    GDK_INTERP_NEAREST,
    GDK_INTERP_TILES,
    GDK_INTERP_BILINEAR,
    GDK_INTERP_HYPER
} GdkInterpType;

GdkPixbufRotation

enum GdkPixbufRotation

GdkPixbufRotation: @GDK_PIXBUF_ROTATE_NONE: No rotation. @GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE: Rotate by 90 degrees. @GDK_PIXBUF_ROTATE_UPSIDEDOWN: Rotate by 180 degrees. @GDK_PIXBUF_ROTATE_CLOCKWISE: Rotate by 270 degrees.

The possible rotations which can be passed to gdk_pixbuf_rotate_simple().

To make them easier to use, their numerical values are the actual degrees.

Enumerator
GDK_PIXBUF_ROTATE_NONE
GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
GDK_PIXBUF_ROTATE_UPSIDEDOWN
GDK_PIXBUF_ROTATE_CLOCKWISE

Definition at line 91 of file gdk-pixbuf-transform.h.

             {
    GDK_PIXBUF_ROTATE_NONE             =   0,
    GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE =  90,
    GDK_PIXBUF_ROTATE_UPSIDEDOWN       = 180,
    GDK_PIXBUF_ROTATE_CLOCKWISE        = 270
} GdkPixbufRotation;

Function Documentation

gdk_pixbuf_composite()

GDK_PIXBUF_AVAILABLE_IN_ALL void gdk_pixbuf_composite	(	const GdkPixbuf *	src,
		GdkPixbuf *	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,
		GdkInterpType	interp_type,
		int	overall_alpha )

gdk_pixbuf_composite_color()

GDK_PIXBUF_AVAILABLE_IN_ALL void gdk_pixbuf_composite_color	(	const GdkPixbuf *	src,
		GdkPixbuf *	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,
		GdkInterpType	interp_type,
		int	overall_alpha,
		int	check_x,
		int	check_y,
		int	check_size,
		guint32	color1,
		guint32	color2 )

gdk_pixbuf_composite_color_simple()

GDK_PIXBUF_AVAILABLE_IN_ALL GdkPixbuf * gdk_pixbuf_composite_color_simple	(	const GdkPixbuf *	src,
		int	dest_width,
		int	dest_height,
		GdkInterpType	interp_type,
		int	overall_alpha,
		int	check_size,
		guint32	color1,
		guint32	color2 )

gdk_pixbuf_flip()

GDK_PIXBUF_AVAILABLE_IN_2_6 GdkPixbuf * gdk_pixbuf_flip	(	const GdkPixbuf *	src,
		gboolean	horizontal )

gdk_pixbuf_rotate_simple()

GDK_PIXBUF_AVAILABLE_IN_2_6 GdkPixbuf * gdk_pixbuf_rotate_simple	(	const GdkPixbuf *	src,
		GdkPixbufRotation	angle )

gdk_pixbuf_scale()

GDK_PIXBUF_AVAILABLE_IN_ALL void gdk_pixbuf_scale	(	const GdkPixbuf *	src,
		GdkPixbuf *	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,
		GdkInterpType	interp_type )

gdk_pixbuf_scale_simple()

GDK_PIXBUF_AVAILABLE_IN_ALL GdkPixbuf * gdk_pixbuf_scale_simple	(	const GdkPixbuf *	src,
		int	dest_width,
		int	dest_height,
		GdkInterpType	interp_type )