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Optimizing Applications for Windows 2000 Terminal Services and Windows nt server 0
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| bet | 35/49 | | Sana | 29.03.2021 | | Hajmi | 197,5 Kb. | | #13691 |
Minimize Direct Video Access
Many programmers are accustomed to the speed of a local video subsystem—a local subsystem is typically fast enough to prevent the user from seeing multiple images or windows being overlaid on the screen. This is not the case when the video stream flows over a network connection. In this case, the user will see (and be frustrated by) the amount of time it takes to render the final screen.
Applications should avoid direct input or output to the video display. If an application needs to read bits from the screen, it should maintain a separate, off-screen copy of the video buffer. Similarly, if an application needs to do elaborate screen output, such as overlaying several images to arrive at a final composite screen, the application should do that work in an off-screen buffer and then send the results to the actual video buffer.
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