gp_get_put_pixel.h File Reference

Pixel manipulations. More...

#include <core/gp_types.h>
#include <core/gp_pixel.h>
#include <core/gp_pixel_pack.gen.h>
#include <core/gp_get_put_pixel.gen.h>

Go to the source code of this file.

Functions
gp_pixel	gp_getpixel (const gp_pixmap *pixmap, gp_coord x, gp_coord y)
	Gets a pixel value.
static gp_pixel	gp_getpixel_raw (const gp_pixmap *pixmap, gp_coord x, gp_coord y)
	Gets a pixel value.
void	gp_putpixel (gp_pixmap *pixmap, gp_coord x, gp_coord y, gp_pixel p)
	Puts a pixel value.
static void	gp_putpixel_raw (gp_pixmap *pixmap, gp_coord x, gp_coord y, gp_pixel p)
	Puts a pixel value.
uint8_t	gp_pixel_addr_offset (const gp_pixmap *pixmap, gp_coord x)
	Returns a pixel offset in a byte (in pixels).

Detailed Description

Pixel manipulations.

Definition in file gp_get_put_pixel.h.

Function Documentation

gp_pixel_addr_offset()

uint8_t gp_pixel_addr_offset	(	const gp_pixmap *	pixmap,
		gp_coord	x
	)

Returns a pixel offset in a byte (in pixels).

This function is internally used in gp_sub_pixmap() to compute starting offset for a subpixmap to a first pixel in a row. Returns zero for pixel types aligned to bytes.

Parameters

pixmap	A pixmap.
x	A x coordinate in a pixmap.

Returns

An offset to the first pixel in byte.