This function assigns new values to red, green, and blue look-up tables.
Declaration:
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AT_ERRCOUNT ACCUAPI IG_dspl_LUT_set(
[IN] HIGEAR hIGear,
[IN] DWORD dwGrpID,
[IN] AT_MODE nFlags,
[IN] const LPBYTE lpRLUT,
[IN] const LPBYTE lpGLUT,
[IN] const LPBYTE lpBLUT
);
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Arguments:
| Name |
Type |
Description |
| hIGear |
HIGEAR |
ImageGear handle of image. |
| dwGrpID |
DWORD |
Identifier of group in which to set LUT options. |
| nFlags |
AT_MODE |
Specify which look-up tables to set. Possible value is 0 or a combination of flags IG_DSPL_R_CHANNEL - if this flag is set then the lpRLUT parameter of this function is not ignored IG_DSPL_G_CHANNEL - if this flag is set then the lpGLUT parameter of this function is not ignored IG_DSPL_B_CHANNEL - if this flag is set then the lpBLUT parameter of this function is not ignored The constant IG_DSPL_ALL_CHANNELS is defined for convenience and can be used to set all three channels.
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#define IG_DSPL_ALL_CHANNELS
(IG_DSPL_R_CHANNEL|IG_DSPL_G_CHANNEL|IG_
DSPL_B_CHANNEL)
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| lpRLUT |
const LPBYTE |
Pointer to a 256 element array of a red look-up table to set. If NULL, then identity the array is assigned to RedLut option. |
| lpGLUT |
const LPBYTE |
Pointer to a 256 element array of a green look-up table to set. If NULL, then identity the array is assigned to GreenLut option. |
| lpBLUT |
const LPBYTE |
Pointer to a 256 element array of a blue look-up table to set. If NULL, then identity the array is assigned to BlueLut option. |
Return Value:
Returns the number of ImageGear errors that occurred during this function call.
Supported Raster Image Formats:
All pixel formats supported by ImageGear Professional.
Sample:
None
Example:
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HIGEAR hIGear; /* HIGEAR handle of image */
DWORD nGrpID; /* display group identifier */
BYTE lut[256]; /* lookup array */
INT i;
...
/* set inverted look-up table */
for( i = 0; i<256; i++ )
lut[i] = 255 - i;
IG_dspl_LUT_set( hIGear, nGrpID, IG_DSPL_ALL_CHANNELS, lut, lut, lut );
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Remarks:
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ImageGear always makes a copy of lpRLUT, lpGLUT and lpBLUT in case they are needed, but does not assign pointers directly so that the application should cleanup the memory allocated for them. |
