L_ColorSeparateBitmap
#include "l_bitmap.h"
L_INT EXT_FUNCTION L_ColorSeparateBitmap(pBitmap, ppBitmap, uStructSize, uFlags)
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pBITMAPHANDLE pBitmap; |
/* pointer to the source bitmap handle */ |
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pBITMAPHANDLE L_FAR * ppBitmap; |
/* pointers to the grayscale bitmaps */ |
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L_UINT uStructSize; |
/* size in bytes, of the structures pointed to by ppBitmap */ |
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L_UINT32 uFlags; |
/* type of separation */ |
Separates the specified bitmap by color plane to produce one grayscale image per plane. You can specify any of several color-space models, including CMYK.
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Parameter |
Description |
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pBitmap |
Pointer to the bitmap handle referencing the bitmap to separate. |
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ppBitmap |
An array of pointers to the bitmap handles that will reference the grayscale bitmaps when they are created. |
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uStructSize |
Size in bytes, of the structures pointed to by ppBitmap, for versioning. Use sizeof(BITMAPHANDLE). |
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The pointers in the array should be in the appropriate order, which in most cases is the order of the letters in the name. For example, for CMY separation, the first pointer should be for the cyan plane, the second for magenta, and the third for yellow. The only exception is RGB, which should be in BGR (blue, green, red) order. |
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uFlags |
The type of separation. Valid values are: |
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Value |
Meaning |
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COLORSEP_RGB |
[0x0000] Create images for three RGB planes. |
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COLORSEP_CMYK |
[0x0001] Create images for four CMYK planes. |
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COLORSEP_HSV |
[0x0002] Create images for three HSV planes. |
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COLORSEP_HLS |
[0x0003] Create images for three HLS planes. |
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COLORSEP_CMY |
[0x0004] Create images for three CMY planes. |
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COLORSEP_YUV |
[0x0005] Create images for three YUV planes. |
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COLORSEP_XYZ |
[0x0006] Create images for three XYZ planes. |
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COLORSEP_LAB |
[0x0007] Create images for three LAB planes. |
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COLORSEP_YCrCb |
[0x0008] Create images for three YCrCb planes. |
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COLORSEP_SCT |
[0x0009] Create images for three SCT planes. |
Returns
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SUCCESS |
The function was successful. |
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< 1 |
An error occurred. Refer to Return Codes. |
Comments
The supported color-space models are RGB, CMYK, CMY, HSV, HLS, YUV, XYZ, LAB, YCrCb and SCT.
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.
If the pBitmap is a 48 or 64 bit bitmap, then the created bitmaps are 16 bit grayscale. Otherwise the created bitmaps are 8 bit grayscale.
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
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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
For complete sample code, refer to the CHILD.C module of the DEMO example.
/* This example creates color separations and merges them */
BITMAPHANDLE LeadBitmap; /* Bitmap handle to hold the loaded image */
BITMAPHANDLE ColorPlanes[4]; /* Array of bitmap handles */
pBITMAPHANDLE pColorPlanes[4]; /* Array of pointers to bitmap handles */
/* Assign bitmap handle addresses to the pointers */
pColorPlanes[0] = &ColorPlanes[0];
pColorPlanes[1] = &ColorPlanes[1];
pColorPlanes[2] = &ColorPlanes[2];
pColorPlanes[3] = &ColorPlanes[3];
/* Load the bitmap, at its own bits per pixel */
L_LoadBitmap (TEXT("IMAGE3.CMP"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
/* Separate the color planes */
L_ColorSeparateBitmap(&LeadBitmap, pColorPlanes, sizeof(BITMAPHANDLE), COLORSEP_CMYK);
/* Free the bitmap */
L_FreeBitmap(&LeadBitmap);
/* Merge the color planes */
L_ColorMergeBitmap(&LeadBitmap, pColorPlanes, sizeof(BITMAPHANDLE), COLORSEP_CMYK);
/* Free the bitmaps used for color planes */
L_FreeBitmap(pColorPlanes[0]);
L_FreeBitmap(pColorPlanes[1]);
L_FreeBitmap(pColorPlanes[2]);
L_FreeBitmap(pColorPlanes[3]);