virtual L_INT LBitmap::FunctionalLight(pLightParams, uFlags = 0)
Adds light to the bitmap according to a function-based distribution. This light will be generated by one of the following methods: linear, quadratic, sine, cosine, or using freehand points.
Pointer to the LPLIGHTPARAMS structure that contains information about the required light.
Reserved for future use. Must be 0.
|SUCCESS||The function was successful.|
|< 1||An error occurred. Refer to Return Codes.|
Controls the brightness of the bitmap according to the method selected for generating the light.
This function supports all bits/pixel supported by LEADTOOLS.
Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
To update a status bar or detect a user interrupt during execution of this function, refer to LBase::EnableStatusCallback.
This function does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.
This function does not support 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.
L_INT LBitmap__FunctionalLightExample(LBitmap *pLeadBitmap)
/* This example generates a linear lighting effect with a center at (uXOrigin,uYOrigin). */
/* Initialize all needed members in the LIGHTPARAMS structure to achieve the linear lighting effect. */
LightParams.uStructSize = sizeof(LIGHTPARAMS);
LightParams. uRAmp = 75;
LightParams. uFlags = FL_LINEAR_QUADRATIC | FL_LINEAR_OUTER;
LightParams. uXOrigin = (L_UINT)(pLeadBitmap->GetWidth ()/2);
LightParams. uYOrigin = (L_UINT)(pLeadBitmap->GetHeight()/2);
/* Apply the linear lighting effect */
return pLeadBitmap->FunctionalLight (&LightParams);
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