LBitmap::Perspective
#include "ltwrappr.h"
L_INT LBitmap::Perspective(pPoints, crBkgColor, uFlag)
POINT L_FAR* pPoints; |
/* pointer to an array of points */ |
COLORREF crBkgColor; |
/* background color */ |
L_UINT uFlag; |
/* flag */ |
Gives a bitmap a 3-D effect, as if it exists on a flat plane and has been skewed into a different shape. This function is available in the Raster Pro and above toolkits.
Parameter |
Description | |
pPoints |
Pointer to an array of points that determine the new locations of 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. | |
uFlag |
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. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
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 LBase::EnableStatusCallback.
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 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 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
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. |
See Also
Example
POINT pNewLocations [4];
pNewLocations [0].x=m_LBitmapWnd.GetWidth()*3/9;
pNewLocations [0].y=m_LBitmapWnd.GetHeight()*1/12;
pNewLocations [1].x=m_LBitmapWnd.GetWidth()*3/4;
pNewLocations [1].y=m_LBitmapWnd.GetHeight()*2/12;
pNewLocations [2].x=m_LBitmapWnd.GetWidth()*2/10;
pNewLocations [2].y=m_LBitmapWnd.GetHeight()*8/10;
pNewLocations [3].x=m_LBitmapWnd.GetWidth()*10/11;
pNewLocations [3].y=m_LBitmapWnd.GetHeight()*7/10;
LBitmap LeadBitmap;
LeadBitmap.Load(TEXT("C:\\IMAGE4.CMP"), 0,ORDER_BGR);
LeadBitmap.Perspective(pNewLocations,RGB(255,255,255), PERSPECTIVE_IMAGE);