Sri

No, my application is basically an image processing solution wherein I have to, 1. read images from an external source (thru a communication port), 2. do some analysis and image transformation 3. and then display the result image with statistics. This is the complete cycle, and is iterated as long as new images are available. As I need the power of raw bitmap, I will be left with a System.Drawing.Bitmap object to be displayed at the end of processing. How can I achieve this with minimum overhead? (using directx surfaces or otherwise). Thanks for the inputs so far.

My bitmaps are System.Drawing.Bitmap objects, dynamically generated within my application and they are not files. I need to process the bitmap and display from memory as I can't afford disk access during the process cycle. And at any time, only one valid bitmap is available. Thanks.

Thanks for the inputs. I understand that the second stage which actually does the rendering to the hardware is done better in DirectX. But, considering the first stage wherein the bitmap is drawn to the surface in memory (which is where I think is my bottleneck), does DirectX have any advantage? For drawing new images repeatedly on a surface, is it worthwhile to do it by getting the DC of the surface and draw the bitmap using GDI's DrawImage? Or, is there a better way? I had to do this as I could not find any suitable method in the Surface class to pass a new bitmap to be used on an existing surface. Instead, everytime I need to destroy the surface and create a new one using the new bitmap. BTW, I'm uisng managed DirectX 9.0c on .NET Framework 1.1. Thanks.

I need to show streaming images (changing bitmaps, which are created in the app during every cycle of operation) on the screen. I thought of implementing this in DirectDraw to speed up the display, time being very critical in my app (total cycle time is in the order of 100 to 200 ms). But later realized that creating bitmap surfaces (using Surface constructor) whenever I need to show a new bitmap is very time consuming. Then I changed the way bitmaps are drawn by getting the DC of the surface and using GDI+ to DrawImage onto this DC. But even this takes too much time to blit, as my bitmaps are usually large (upto 2k x 2k). Can anyone suggest a better way of doing this? Is my choice of using DirectX for this interface justified compared to a normal GDI+ interface, to speed up the display? I'd really appreciate any light on this. Thanks.