References ▼
#include "l_bitmap.h"
L_LTIMGSFX_API L_INT L_PerspectiveBitmap(pBitmap, pPoints, crBkgColor, uFlags)
pBITMAPHANDLE pBitmap; |
pointer to the bitmap handle |
POINT * pPoints; |
pointer to an array of points |
COLORREF crBkgColor; |
background color |
L_UINT uFlags; |
flag |
Gives a bitmap a 3-D effect, as if it exists on a flat plane and has been skewed into a different shape.
| Parameter | Description | |
| pBitmap | Pointer to the bitmap handle referencing the bitmap to be changed. | |
| pPoints | Pointer to an array of points that determines the new locations of the image corners. It should contain four points; points at indices 0, 1, 2 and 3 determine the new locations of left-top, right-top, left-bottom and right-bottom image corners respectively. | |
| crBkgColor | Background color. | |
| uFlags | Flag that indicates how to create the background. Possible values are: | |
| Value | Meaning | |
| PERSPECTIVE_IMAGE | [0x0001] Use the same image as the background. | |
| PERSPECTIVE_COLOR | [0x0002] Fill the back ground with crBkgColor. | |
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.
The new locations for the image corners should keep the relative relation between corners. For example, the point at index 1 should be to the right of point at index 0 and above the point at index 3. Also, the point at index 2 should be to the left of the point at index 3 and below the point at index 0 and so on. All new locations should remain inside the image.
To update a status bar or detect a user interrupt during execution of this function, refer to L_SetStatusCallback.
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.
If the bitmap has a region, this function works only on the region. If the bitmap does not have a region, this function works on the entire bitmap.
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.
The following example loads a bitmap, and applies the 3D perspective effect
#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileNameL_INT PerspectiveBitmapExample(L_VOID){L_INT nRet;BITMAPHANDLE LeadBitmap;POINT pNewLocations [4];/* Load the bitmap, keeping the bits per pixel of the file */nRet = L_LoadBitmap (MAKE_IMAGE_PATH(TEXT("Sample1.CMP")), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);if(nRet !=SUCCESS)return nRet;pNewLocations [0].x=LeadBitmap.Width*3/9;pNewLocations [0].y=LeadBitmap.Height*1/12;pNewLocations [1].x=LeadBitmap.Width*3/4;pNewLocations [1].y=LeadBitmap.Height*2/12;pNewLocations [2].x=LeadBitmap.Width*2/10;pNewLocations [2].y=LeadBitmap.Height*8/10;pNewLocations [3].x=LeadBitmap.Width*10/11;pNewLocations [3].y=LeadBitmap.Height*7/10;/*Apply the filter*/nRet = L_PerspectiveBitmap(&LeadBitmap, pNewLocations,RGB(255,255,255), PERSPECTIVE_IMAGE);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 bitmapif(LeadBitmap.Flags.Allocated)L_FreeBitmap(&LeadBitmap);return SUCCESS;}
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