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Gets the current brightness, highlight and contrast values used when transferring images from the current TWAIN source.
#include "ltwrappr.h"
L_INT LTwain::GetImageEffects (ulFlags, pBrightness, pContrast, pHighlight)
Flags that indicate which capability values to get. Possible values are:
| Value | Meaning |
|---|---|
| TWAIN_NEGOTIATE_BRIGHTNESS | [0x0010] Gets the brightness capability value. |
| TWAIN_NEGOTIATE_CONTRAST | [0x0020] Gets the contrast capability value. |
| TWAIN_NEGOTIATE_HIGHLIGHT | [0x0040] Gets the highlight capability value. |
Pointer to a variable to be updated with the current brightness capability value. For more information on possible values, refer to the TWAIN specification.
Pointer to a variable to be updated with the current contrast capability value. For more information on possible values, refer to the TWAIN specification.
Pointer to a variable to be updated with the current highlight capability value. For more information on possible values, refer to the TWAIN specification.
| Value | Meaning |
|---|---|
| SUCCESS | The function was successful. |
| < 1 | An error occurred. Refer to Return Codes. |
This function gets the current brightness capability ICAP_BRIGHTNESS, highlight capability ICAP_HIGHLIGHT, and contrast capability ICAP_CONTRAST values. For more information on these capabilities, refer to the TWAIN specification.
To set these capabilities, call the LTwain::SetImageEffects function.
For an example, refer to LTwain::SetImageEffects.