L_VignetteBitmap
#include "l_bitmap.h"
L_INT EXT_FUNCTION L_VignetteBitmap(pBitmap, pVignetteInfo)
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pBITMAPHANDLE pBitmap; |
/* pointer to the bitmap handle */ |
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LPVIGNETTEINFO pVignetteInfo; |
/* pointer to a structure */ |
Draws a specified shape and feathers it to the bitmap. This function is available in the Raster Pro and above toolkits.
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Parameter |
Description |
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pBitmap |
Pointer to the bitmap handle that references the bitmap to which to apply the effect. |
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pVignetteInfo |
Pointer to the VIGNETTEINFO structure that contains information about the vignette effect. |
Returns
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SUCCESS |
The function was successful. |
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< 1 |
An error occurred. Refer to Return Codes. |
Comments
This function can be used to draw a circle, ellipse, rectangle or square to create a vignette shape and then a color is feathered to the bitmap, filling either the inside or the outside of the vignette shape.
As an example, if you use the following figure:
and you call L_RomanMosaicBitmap using the following values:
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Parameter |
Value |
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ptCenter |
(144, 181) |
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nFading |
50 |
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uFadingRate |
33 |
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uWidth |
145 |
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uHeight |
181 |
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crVigColor |
White |
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uFlags |
VIG_ELLIPSE | VIG_FILLIN |
The following figure results:
This function can process the whole image or a region of the image. If a bitmap has a region, the effect is applied only to the region.
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
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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
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Functions: |
L_UnderlayBitmap, L_CombineBitmap, L_FeatherAlphaBlendBitmap, L_CreateFadedMask, L_TextureAlphaBlendBitmap |
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Topics: |
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Example
BITMAPHANDLE LeadBitmap;/* Bitmap handle for the image */
VIGNETTEINFO VignetteInfo; /* Structure which store the required parameters*/
/* Load a bitmap at its own bits per pixel */
L_LoadBitmap(TEXT("Image1.cmp"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGRORGRAY, NULL, NULL);
/*Fill the structures with the required parameters, Vignette shape is ellipse, Feathering inside the vignette object, the ellipse is centered, fading color is blue*/
VignetteInfo.uStructSize = sizeof(VIGNETTEINFO);
VignetteInfo.crVigColor = RGB(0,0,255);
VignetteInfo.nFading = 50;
VignetteInfo.uFlags = VIG_ELLIPSE | VIG_FILLIN;
VignetteInfo.uFadingRate = 100;
VignetteInfo.uHeight = LeadBitmap.Height / 2;
VignetteInfo.uWidth = LeadBitmap.Width / 2;
VignetteInfo.ptCenter.x = LeadBitmap.Width / 2;
VignetteInfo.ptCenter.y = LeadBitmap.Height / 2;
L_VignetteBitmap(&LeadBitmap, &VignetteInfo);