go-cairo.c File Reference

#include <goffice/utils/go-cairo.h>
#include <math.h>

Defines
#define	MULT(d, c, a, t)   G_STMT_START { t = c * a + 0x7f; d = ((t >> 8) + t) >> 8; } G_STMT_END
#define	MULT(d, c, a, t)   G_STMT_START { t = (a)? c * 255 / a: 0; d = t;} G_STMT_END
Functions
static void	skip_spaces (char **path)
static void	skip_comma_and_spaces (char **path)
static gboolean	parse_value (char **path, double *x)
static gboolean	parse_values (char **path, unsigned int n_values, double *values)
static void	emit_function_2 (char **path, cairo_t *cr, void(*cairo_func)(cairo_t *, double, double))
static void	emit_function_6 (char **path, cairo_t *cr, void(*cairo_func)(cairo_t *, double, double, double, double, double, double))
void	go_cairo_emit_svg_path (cairo_t *cr, char const *path)
	go_cairo_emit_svg_path: : a cairo context : a SVG path
gboolean	go_cairo_surface_is_vector (cairo_surface_t const *surface)
void	go_cairo_convert_data_from_pixbuf (unsigned char *dst, unsigned char const *src, int width, int height, int rowstride)
	go_cairo_convert_data_from_pixbuf: : a pointer to pixel data in pixbuf format : a pointer to pixel data in cairo format : image width : image height : data rowstride
void	go_cairo_convert_data_to_pixbuf (unsigned char *dst, unsigned char const *src, int width, int height, int rowstride)
	go_cairo_convert_data_to_pixbuf: : a pointer to pixel data in cairo format : a pointer to pixel data in pixbuf format : image width : image height : data rowstride

---

Define Documentation

#define MULT	(		d,
			c,
			a,
			t
	)			G_STMT_START { t = c * a + 0x7f; d = ((t >> 8) + t) >> 8; } G_STMT_END

Referenced by go_cairo_convert_data_from_pixbuf(), and go_cairo_convert_data_to_pixbuf().

#define MULT	(		d,
			c,
			a,
			t
	)			G_STMT_START { t = (a)? c * 255 / a: 0; d = t;} G_STMT_END

---

Function Documentation

static void emit_function_2	(	char **	path,
		cairo_t *	cr,
		void(*)(cairo_t *, double, double)	cairo_func
	)			[static]

References parse_values(), and skip_spaces().

Referenced by go_cairo_emit_svg_path().

static void emit_function_6	(	char **	path,
		cairo_t *	cr,
		void(*)(cairo_t *, double, double, double, double, double, double)	cairo_func
	)			[static]

References parse_values(), and skip_spaces().

Referenced by go_cairo_emit_svg_path().

void go_cairo_convert_data_from_pixbuf	(	unsigned char *	dst,
		unsigned char const *	src,
		int	width,
		int	height,
		int	rowstride
	)

go_cairo_convert_data_from_pixbuf: : a pointer to pixel data in pixbuf format : a pointer to pixel data in cairo format : image width : image height : data rowstride

Converts the pixel data stored in in GDK_COLORSPACE_RGB pixbuf format to CAIRO_FORMAT_ARGB32 cairo format and move them to . If == , pixel are converted in place.

References MULT.

Referenced by pixbuf_to_cairo().

void go_cairo_convert_data_to_pixbuf	(	unsigned char *	dst,
		unsigned char const *	src,
		int	width,
		int	height,
		int	rowstride
	)

go_cairo_convert_data_to_pixbuf: : a pointer to pixel data in cairo format : a pointer to pixel data in pixbuf format : image width : image height : data rowstride

Converts the pixel data stored in in CAIRO_FORMAT_ARGB32 cairo format to GDK_COLORSPACE_RGB pixbuf format and move them to . If == , pixel are converted in place.

References MULT.

void go_cairo_emit_svg_path	(	cairo_t *	cr,
		char const *	path
	)

go_cairo_emit_svg_path: : a cairo context : a SVG path

Emits a path described as a SVG path string (d property of path elements) to a cairo context.

References emit_function_2(), emit_function_6(), and skip_spaces().

gboolean go_cairo_surface_is_vector

(

cairo_surface_t const *

surface

)

References type.

static gboolean parse_value	(	char **	path,
		double *	x
	)			[static]

Referenced by parse_values().

static gboolean parse_values	(	char **	path,
		unsigned int	n_values,
		double *	values
	)			[static]

References parse_value(), and skip_comma_and_spaces().

Referenced by emit_function_2(), and emit_function_6().

static void skip_comma_and_spaces

(

char **

path

)

[static]

Referenced by parse_values().

static void skip_spaces

(

char **

path

)

[static]

Referenced by emit_function_2(), emit_function_6(), and go_cairo_emit_svg_path().