Description
Syntax
| Visual Basic |
|---|
Public Sub LoadBufferPtr( _ ByRef pBuffer As Byte, _ ByVal BufferSize As Long _ ) |
Parameters
- pBuffer
- An unsigned char pointer to a memory buffer containing the image file data in memory.
- BufferSize
- The size of the memory buffer pointed to by pBuffer.
Remarks
The result of setting the LoadBufferPtr method is identical to setting the FileName property, except that the LoadBufferPtr method loads image data from memory while the FileName property loads image data from a disk file.
The LoadBufferPtr method is also the same as the LoadBlob and LoadBufferPtr methods, except that the interfaces are different:
-
LoadBlob is typically used to interface with the Visual Basic Data control
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LoadBuffer is used in applications where a locked global handle to the image data stored in memory is available
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LoadBufferPtr is used in applications where a pointer to the image data stored in memory is available.
Like the other methods however, when an image is loaded using the LoadBufferPtr method, the image is converted to a Device Independent Bitmap (DIB). The hDIB property is set to the handle of DIB. The DIB is converted to a Device Dependent Bitmap (DDB) and the Picture property is set to the resulting DDB. If an Undo DIB resides in memory, it is deleted and the hDIBUndo property is set to NULL.
Note: CameraRAW images can only be loaded from a filename. Loading from a stream is not supported as the entire image must be loaded before the raw format can be recognized.