L_LTVKRN_API L_INT L_VecSetViewport(pVector, pViewport)
Sets the current view port.
Pointer to a vector handle.
Pointer to a RECT structure that contains data on the new view port.
|SUCCESS||The function was successful.|
|< 1||An error occurred. Refer to Return Codes.|
Use this function to set the view port associated with a vector.
If pVector is attached to a window, you must call this function when processing WM_SIZE messages, since the VECTOR library needs to know when the window size has changed (DirectX), or when the double buffer mode is selected in the current VECTOR engine.
This function and L_VecSetCamera are required to complete the projection process from a vector image onto a 2D surface.
Required DLLs and Libraries
This example will use L_VecSetViewport to realize a vector drawing into the upper left corner of a BITMAPHANDLE.
L_LTVKRNTEX_API L_INT VecSetViewportExample(
/* Setup the viewport rectangle */
rect.left = 0;
rect.top = 0;
rect.right = pBitmap->Width / 2;
rect.bottom = pBitmap->Height / 2;
/* Set the viewport */
nRet = L_VecSetViewport( pVector, &rect );
if (nRet != SUCCESS)
/* Realize */
nRet = L_VecRealize( pBitmap, pVector, FALSE );