gf_draw_spanlist()

Draw a list of spans

Synopsis:

#include <gf/gf.h>

int gf_draw_spanlist (
        gf_context_t    context,
        unsigned        nspans,
        int             x1[],
        int             x2[],
        int             y[]  );

Arguments:

context

The graphics context to use.

nspans

The number of spans in the list.

x1, x2

An array of left and right x values for the spans.

y

An array of y values for the spans.

Library:

gf

Description:

This function draws a list of spans in the current foreground color. A span is a horizontal run of pixels with fixed height of one pixel.

Returns:

GF_ERR_OK

Success.

GF_ERR_PARM

Invalid span; x1[i] and x2[i] are inverted for some value of i.

GF_ERR_NOLOCK

The hardware isn't locked; check to ensure gf_draw_begin() was called successfully.

Classification:

QNX Graphics Framework

See also:

gf_context_set_linedash(), gf_context_set_linejoin(), gf_draw_poly_fill(), gf_draw_span(), gf_point_t

“Drawing lines and polygons” in the Basic Drawing chapter