CAPTURECALLBACK Function
#include "l_bitmap.h"
L_INT pEXT_CALLBACK YourFunction (pBitmap, pCaptureInfo, pUserData)
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pBITMAPHANDLE pBitmap; |
/* pointer to the bitmap handle */ |
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pLEADCAPTUREINFO pCaptureInfo; |
/* pointer to an info structure */ |
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/* pointer to additional parameters */ |
Handles the output image data acquired by one of the image capture functions.
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Parameter |
Description |
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pBitmap |
The pointer to the bitmap handle referencing the bitmap that contains the captured image. |
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pCaptureInfo |
Pointer to a LEADCAPTUREINFO structure containing information about the source of the captured image. |
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pUserData |
Void pointer that you can use to access a variable or structure containing data that your callback function needs. This gives you a way to receive data indirectly from the function that uses this callback function. (This is the same pointer that you pass in the pUserData parameter of the calling function.) |
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Keep in mind that this is a void pointer, which must be cast to the appropriate data type within your callback function. |
Returns
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SUCCESS |
The function was successful. |
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< 1 |
An error occurred. Refer to Return Codes. |
Comments
Use this callback function to process captured image data when multiple captures are performed. Multiple captures can be done by setting the capture options using L_SetCaptureOption.
Example
For an example, refer to L_CaptureArea.