imgGrab
Usage
rval imgGrab(SESSION_ID sid, void** bufAddr, uInt32 waitForNext);
Purpose
Acquires the most current frame into the specified buffer. Call this function only after calling imgGrabSetup.
Parameters
| Name | Type | Direction |
| sid | SESSION_ID | input |
| bufAddr | void** | input/output |
| waitForNext | uInt32 | input |
| rval | Int32 | output |
Parameter Discussion
sid: valid SESSION_ID.
bufAddr: pointer to a pointer to an area of memory in which to store the image. If bufAddr points to a NULL pointer, this call allocates a buffer, acquires an image, and returns the buffer address in the location specified by bufAddr. If bufAddr points to a non-NULL pointer, this function acquires into that buffer.
waitForNext: if zero, the function returns the most recently acquired image. If non-zero, the function waits for and returns the next acquired image.
Return Value
This function returns 0 on success. On failure, this function returns an error code. For more information about the error code, call imgShowError.