GpiQueryLineJoin

This function returns the current line-join attribute, as set by the GpiSetLineJoin function.

Syntax

GpiQueryLineJoin(hps)

Parameters

hps (HPS) - input: Presentation-space handle.

Return Value

lLineJoin (LONG) - returns

Line join.

LINEJOIN_DEFAULT (0L): Default
LINEJOIN_BEVEL (1L): Bevel
LINEJOIN_ROUND (2L): Round
LINEJOIN_MITRE (3L): Miter
LINEJOIN_ERROR (-1L): Error.

Remarks

This function is invalid when the drawing mode (see GpiSetDrawingMode) is set to retain.

Errors

Possible returns from WinGetLastError:

PMERR_INV_HPS (0x207F): An invalid presentation-space handle was specified.
PMERR_PS_BUSY (0x20F4): An attempt was made to access the presentation space from more than one thread simultaneously.
PMERR_INV_IN_RETAIN_MODE (0x208C): An attempt was made to issue a function (for example, query) that is invalid when the actual drawing mode is not draw or draw-and-retain.
PMERR_INV_DC_TYPE (0x2060): An invalid type parameter was specified with DevOpenDC, or a function was issued that is invalid for a OD_METAFILE_NOQUERY device context.

Example Code

#define INCL_GPIPRIMITIVES /* Or use INCL_GPI, INCL_PM, */
#include <os2.h>

HPS     hps;       /* Presentation-space handle. */
LONG    lLineJoin; /* Line join. */

lLineJoin = GpiQueryLineJoin(hps);

This example uses GpiQueryLineJoin to return the current line-join attribute after setting the draw mode to DRAW.

#define INCL_GPIPRIMITIVES /* Primitive functions */
#define INCL_GPICONTROL /* Control functions */
#include <os2.h>

HPS hps; /* Presentation-space handle */
LONG lLineJoin; /* Line join */

if (GpiSetDrawingMode(hps, DM_DRAW) == TRUE)
  lLineJoin = GpiQueryLineJoin(hps);

Related Functions

GpiSetLineJoin