L_FunctionalLightBitmap
#include "l_bitmap.h"
L_INT EXT_FUNCTION L_FunctionalLightBitmap(pBitmap, pLightParams)
pBITMAPHANDLE pBitmap; |
/* pointer to the bitmap handle */ |
LPLIGHTPARAMS pLightParams; |
/* lighting parameters */ |
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. This function is available in the Raster Pro and above toolkits.
Parameter |
Description |
pBitmap |
Pointer to the bitmap handle referencing the bitmap to be modified. |
pLightParams |
Pointer to the LIGHTPARAMS structure that contains information about the required light. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
Controls the brightness of the bitmap according to the method selected for generating the light.
This function supports all bits/pixel supported by LEADTOOLS.
This function supports 12 and 16-bit grayscale and 48 and 64-bit color images. 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 L_SetStatusCallback.
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.
Required DLLs and Libraries
LTIMG For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Platforms
Windows 95 / 98 / Me, Windows 2000 / XP.
See Also
Example
/* This example loads a bitmap and generates a linear lighting effect with a center at (uXOrigin,uYOrigin). */
BITMAPHANDLE LeadBitmap; /* Bitmap handle to hold the loaded image. */
LIGHTPARAMS LightParams;
/* Load the bitmap, keeping the bits per pixel of the file */
L_LoadBitmap (TEXT("IMAGE1.CMP"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
/* 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)(LeadBitmap.Width/2);
LightParams. uYOrigin = (L_UINT)(LeadBitmap.Height/2);
/* Apply the linear lighting effect */
L_FunctionalLightBitmap (&LeadBitmap, & LightParams);