#include "l_bitmap.h"
L_LTIMGSFX_API L_INT L_FunctionalLightBitmap(pBitmap, pLightParams, uFlags)
pBITMAPHANDLE pBitmap; |
pointer to the bitmap handle |
pLIGHTPARAMS pLightParams; |
lighting parameters |
L_UINT32 uFlags; |
flags |
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.
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. |
uFlags |
Reserved for future use. Must be 0. |
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
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.
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 in the Document and Medical Imaging 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 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.
Required DLLs and Libraries
For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Win32, x64.
This example loads a bitmap and generates a linear lighting effect with a center at (uXOrigin,uYOrigin).
#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName
L_INT FunctionalLightBitmapExample(L_VOID)
{
L_INT nRet;
BITMAPHANDLE LeadBitmap; /* Bitmap handle to hold the loaded image. */
LIGHTPARAMS LightParams;
/* Load the bitmap, keeping the bits per pixel of the file */
nRet = L_LoadBitmap (MAKE_IMAGE_PATH(TEXT("IMAGE1.CMP")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
if(nRet !=SUCCESS)
return nRet;
/* 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 */
nRet = L_FunctionalLightBitmap (&LeadBitmap, & LightParams, 0);
if(nRet !=SUCCESS)
return nRet;
nRet = L_SaveBitmap(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL);
if(nRet !=SUCCESS)
return nRet;
//free bitmap
if(LeadBitmap.Flags.Allocated)
L_FreeBitmap(&LeadBitmap);
return SUCCESS;
}
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