LBitmapBase::ChangeViewPerspective
#include "ltwrappr.h"
virtual L_INT LBitmapBase::ChangeViewPerspective(nViewPerspective)
virtual L_INT LBitmapBase::ChangeViewPerspective(LBitmapSrc, nViewPerspective)
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L_INT nViewPerspective; |
/* desired view perspective*/ |
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LBitmapBase& LBitmapSrc; |
/* the source bitmap object*/ |
Rotates and flips the bitmap data as necessary to achieve the desired view perspective. The ViewPerspective field in the bitmap handle is changed, and thus, the display is unchanged.
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Parameter |
Description |
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nViewPerspective |
Desired view perspective. Possible values are: |
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Constant |
Meaning |
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TOP_LEFT |
[1] Top-left of image is first in memory. |
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BOTTOM_LEFT180 |
[2] (Document/Medical only) Same as TOP_RIGHT, which is BOTTOM_LEFT rotated clockwise by 180 degrees. |
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BOTTOM_LEFT |
[4] Bottom-left of image is first in memory. |
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TOP_LEFT180 |
[3] (Document/Medical only) Same as BOTTOM_RIGHT, which is TOP_LEFT rotated clockwise by 180 degrees. |
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RIGHT_TOP |
[6] (Document/Medical only) First row is the right side, first column is top side. |
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TOP_LEFT90 |
[6] (Document/Medical only) Same as RIGHT_TOP, which is TOP_LEFT rotated clockwise by 90 degrees. |
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LEFT_TOP |
[5] (Document/Medical only) First row is the left side, first column is the top side |
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BOTTOM_LEFT90 |
[5] (Document/Medical only) Same as LEFT_TOP, which is BOTTOM_LEFT rotated clockwise by 90 degrees |
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RIGHT_BOTTOM |
[7] (Document/Medical only) First row is the right side, first column is the bottom side |
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BOTTOM_LEFT270 |
[7] (Document/Medical only) Same as RIGHT_BOTTOM, which is BOTTOM_LEFT rotated clockwise by 270 degrees |
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LEFT_BOTTOM |
[8] (Document/Medical only) First row is the left side, first column is top side. |
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TOP_LEFT270 |
[8] (Document/Medical only) Same as LEFT_BOTTOM, which is TOP_LEFT rotated clockwise by 270 degrees. |
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LBitmapSrc |
The source bitmap object. |
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Returns
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SUCCESS |
The function was successful. |
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< 1 |
An error occurred. Refer to Return Codes. |
Comments
Use this function to change the data and the ViewPerspective field in the bitmap handle. This function does not affect the image display. This can be used to simplify calculations that involve bitmap coordinates. For general information about view perspectives, refer to Accounting for View Perspective.
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Note: |
The LBitmapSrc parameter is passed by reference, and is a required parameter. |
Required DLLs and Libraries
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LTDIS 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
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Elements: |
LBitmapBase::RotateViewPerspective, LBitmapBase::GetViewPerspective, Class Members |
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Topics: |
Example
This is the example for LBitmapBase::ChangeViewPerspective(LBitmapSrc, nViewPerspective):
LBitmapBase MyBitmap,Bitmap2;
MyBitmap.SetFileName(TEXT("image1.cmp"));
MyBitmap.Load();
if(MyBitmap.IsAllocated())
Bitmap2.ChangeViewPerspective(MyBitmap, BOTTOM_LEFT);
This is the example for LBitmapBase::ChangeViewPerspective(nViewPerspective):
LBitmapBase MyBitmap;
MyBitmap.SetFileName(TEXT("image1.cmp"));
MyBitmap.Load();
if(MyBitmap.IsAllocated())
MyBitmap.ChangeViewPerspective(BOTTOM_LEFT);