gf_draw_span()

Draw a span

Synopsis:

#include <gf/gf.h>

int gf_draw_span (
        gf_context_t    context,
        int             x1,
        int             x2,
        int             y );

Arguments:

context: The graphics context to use.
x1: The left x value of the span.
x2: The right x value of the span.
y: The y value of the span.

Library:

gf

Description:

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

Returns:

GF_ERR_OK: Success.
GF_ERR_PARM: Invalid span; x1 and x2 are inverted.
GF_ERR_NOLOCK: The hardware isn't locked; check to ensure gf_draw_begin() was called successfully.

Classification:

QNX Graphics Framework

Safety:
Interrupt handler	No
Signal handler	No
Thread	Yes

See also:

gf_context_set_linedash(), gf_context_set_linejoin(), gf_draw_poly_fill(), gf_draw_spanlist(), gf_point_t

“Drawing lines and polygons” in the Basic Drawing chapter