Simulation support:

None. This function is mandatory for all drivers.

Description:

GreGetPel returns the color of a pel at a specified position.

This function must be supported by the presentation driver, and is called by GpiQueryPel. GreGetPel is used to query the value of a pel at a specified (X,Y) coordinate within the DC. This function can be handled by bit-map simulation.

#define INCL_GRE_BITMAPS
#include <os2.h>

HDC        hdc;        /*  Device context handle. */
PPOINTL    pptlPel;    /*  Pointer to the coordinate (X, Y) pair structure. */
PVOID      pInstance;  /*  Pointer to instance data. */
ULONG      lFunction;  /*  High-order WORD=flags; low-order WORD=NGreGetPel. */
LONG       rc;         /*  Return Code. */

rc = GreGetPel(hdc, pptlPel, pInstance, lFunction);