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L_DiffuseGlowBitmap

Summary

Adds a colored glow to a bitmap's light or dark areas, making these areas shine with a neon glow.

Syntax

#include "l_bitmap.h"

L_LTIMGSFX_API L_INT L_DiffuseGlowBitmap(pBitmap, nGlowAmount, uClearAmount, uSpreadAmount, uWhiteNoise, crGlowColor, uFlags)

Parameters

pBITMAPHANDLE pBitmap

Pointer to the bitmap handle that references the bitmap on which to apply the effect.

L_INT nGlowAmount

Glow intensity, expressed in tenths of a percent. Possible values range from -1000 1000. Use positive values to add glow to the brighter regions of the image, and negative values to add glow to the darker regions of the image.

L_UINT uClearAmount

Value that represents how deeply the glow will penetrate into the non-glowing areas, expressed in tenths of a percent. Possible values range from 0 1000. A value of 0 indicates total glow diffusion, whereas a value of 1000 indicates the glow does not penetrate into any of the non-glowing areas.

L_UINT uSpreadAmount

Value that represents the amount of blur in the glow diffusion, from 0 to 100 pixels. Possible values range from 0 1000. A value of 0 indicates none of the glow is diffused, whereas a value of 1000 indicates maximum diffusion.

L_UINT uWhiteNoise

Percent of the bitmap to be covered with added pixels, expressed in tenths of a percent. The pixels will be added randomly. Possible values range from 0 1000.

COLORREF crGlowColor

The COLORREF value that specifies the glow color. You can specify a COLORREF value, such as the return value of the Windows RGB macro, or you can use the PALETTEINDEX macro to specify a palette color.

L_UINT32 uFlags

Reserved for future use. Must be 0.

Returns

Value	Meaning
SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

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 filter adds pixels randomly to the bitmap. A glow is added based on a combination of the pixel colors and the glow color.

For an example, click here

If the bitmap has a region, the effect will be applied on the region only.

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.

Diffuse Glow Function - Before

Diffuse Glow Function - After

View additional platform support for this Diffuse Glow function.

Required DLLs and Libraries

LTIMGSFX
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

Win32, x64.

Example

L_INT DiffuseGlowBitmapExample(L_VOID) 
{ 
   L_INT nRet; 
   BITMAPHANDLE LeadBitmap;   /* Bitmap handle for the image */ 
 
   /* Load a bitmap at its own bits per pixel  */ 
   nRet = L_LoadBitmap(MAKE_IMAGE_PATH(TEXT("sample5.cmp")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL); 
   if (nRet != SUCCESS) 
      return nRet; 
 
   /* Add Diffuse Glow to the image*/ 
   nRet = L_DiffuseGlowBitmap(&LeadBitmap, 500, 500, 200, 50, RGB(255, 255, 255), 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; 
}