DEVESC BREAK EXTRA

GreEscape DEVESC_BREAK_EXTRA changes the width of the break character on a hardcopy device.

Simulation support

This function is mandatory for hardcopy drivers, but may simply return a DEVESC_NOTIMPLEMENTED code. For other drivers, it is simulated by a handling routine in the graphics engine.

Syntax

GreEscape(hdc, lEscape, cInCount, pInData, pcOutCount, pOutData, pInstance, lFunction)

Parameters

hdc (HDC) - input

Device context handle.

lEscape (LONG) - input

DEVESC_BREAK_EXTRA escape code.

cInCount (LONG) - input

Number of bytes pointed to by pInData. When cInCount=0, the handling routine resets the extra width to 0.

pInData (PBYTE) - input

If cInCount is not equal to 0, pInData is a pointer to a fixed value. This value is the required extra width defined in world coordinates.

pcOutCount (PLONG) - input

The handling routine ignores this parameter.

pOutData (PLONG) - input

The handling routine ignores this parameter.

pInstance (PVOID) - input

Pointer to instance data.

lFunction (ULONG) - input

High-order WORD=flags; low-order WORD=NGreEscape.

Returns

rc (LONG) - returns

Return Code.

The handling routine returns:

DEV_OK - Successful

DEVESC_NOTIMPLEMENTED - Escape not implemented for specified code

DEVESC_ERROR - Error

Remarks

The handling routine sets or resets, as determined by the value of cInCount, an extra width value for the break character. Upon completion, the width of the break character is the default width specified by the font plus any extra widths set by DEVESC_BREAK_EXTRA and DEVESC_CHAR_EXTRA. The extra widths can be positive, zero, or negative.

This escape code is implemented by old hardcopy drivers. The function of this escape code is replaced by the character attribute fxBreakExtra. See Character Attributes.

This escape code is metafiled and recorded.

Source Code Sample

Declaration:

#define INCL_GRE_DEVICE
#include <os2.h>

HDC      hdc;         /* Device context handle. */
LONG     lEscape;     /* DEVESC_BREAK_EXTRA escape code. */
LONG     cInCount;    /* Number of bytes pointed to by pInData. */
PBYTE    pInData;     /* If cInCount is not equal to 0, pInData is a pointer to a fixed value. */
PLONG    pcOutCount;  /* The handling routine ignores this parameter. */
PLONG    pOutData;    /* The handling routine ignores this parameter. */
PVOID    pInstance;   /* Pointer to instance data. */
ULONG    lFunction;   /* High-order WORD=flags; low-order WORD=NGreEscape. */
LONG     rc;          /* Return Code. */

rc = GreEscape(hdc, lEscape, cInCount, pInData, count, pOutData, pInstance, lFunction);