README.TXT

PlgBlt Demonstration 
 
 
SUMMARY 
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The PlgBlt function can copy a bit image onto an arbitrary parallelogram. 
Applications can use this function to easily rotate or shear bitmaps. The 
PLGBLT sample is an easy-to-use demonstration of how this can be done. 
 
MORE INFORMATION 
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The program presents a dialog box that displays the input parameters to the  
PlgBlt function. By choosing the "New Src" or "New Mask" button, the user  
can select a new bitmap for use as the source bitmap or as the monochrome  
mask bitmap. The client area of the window is divided into three regions.  
The region on the left contains the result of the PlgBlt operation. The  
region in the middle provides the source HDC, and the region on the right  
provides the mask bitmap for the PlgBlt operation. 
 
In each of the three regions, there is a "direct manipulation object." This  
object may be picked up and moved by clicking the left mouse button in the  
upper-left corner and dragging. The three objects are restricted in their  
response to user actions to correctly reflect the parameters to the PlgBlt  
function. The object in the mask region may be moved only. The object in the  
source region may be moved or sized. The object in the destination region  
may be moved, sized, sheared, or rotated. Please see the WXFORM sample for  
more information on how this direct manipulation is accomplished.