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GOCairo

GOCairo

Synopsis

void                go_cairo_emit_svg_path              (cairo_t *cr,
                                                         char const *path);
gboolean            go_cairo_surface_is_vector          (cairo_surface_t const *surface);
void                go_cairo_convert_data_to_pixbuf     (unsigned char *dst,
                                                         unsigned char const *src,
                                                         int width,
                                                         int height,
                                                         int rowstride);
void                go_cairo_convert_data_from_pixbuf   (unsigned char *dst,
                                                         unsigned char const *src,
                                                         int width,
                                                         int height,
                                                         int rowstride);
#define             GO_CAIRO_CLAMP                      (x)
#define             GO_CAIRO_CLAMP_SNAP                 (x,
                                                         even)

Description

Details

go_cairo_emit_svg_path ()

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

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

cr :

a cairo context

path :

a SVG path

go_cairo_surface_is_vector ()

gboolean            go_cairo_surface_is_vector          (cairo_surface_t const *surface);

surface :

Returns :


go_cairo_convert_data_to_pixbuf ()

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

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

dst :

a pointer to pixel data in pixbuf format

src :

a pointer to pixel data in cairo format

width :

image width

height :

image height

rowstride :

data rowstride

go_cairo_convert_data_from_pixbuf ()

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

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

dst :

a pointer to pixel data in cairo format

src :

a pointer to pixel data in pixbuf format

width :

image width

height :

image height

rowstride :

data rowstride

GO_CAIRO_CLAMP()

#define GO_CAIRO_CLAMP(x) CLAMP((x),-15000,15000)

x :


GO_CAIRO_CLAMP_SNAP()

#define GO_CAIRO_CLAMP_SNAP(x,even) GO_CAIRO_CLAMP(even ? floor (x + .5):floor (x) + .5)

x :

even :

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