是比GDI更快的DirectDraw屏幕截图了吗? [英] is screenshotting by DirectDraw faster than GDI way?

问题描述

为了节省时间，可能有人尝试过此操作或看到了一些相关信息.

just to save some time, probably anybody tried this or saw somewhere related info.

询问DirectDraw而不是DirectX，因为我需要支持Win2000及更高版本，并且我无法在目标PC上安装DirectX

asking about DirectDraw and not about DirectX because I need to support Win2000 and up, and I cannot install DirectX on target PC

推荐答案

尝试通过Direct3D捕获并与GDI方法进行比较.结果并不明确.在具有相当不错的显卡的Win7 x64上，D3D方式显示性能提高了约2倍.在装有未集成但旧的视频卡D3D的WinXP 32位笔记本电脑上，工作时间长得多.在另一个WinXP上(我不知道任何硬件细节)，D3D的运行速度慢了将近2倍.

tried capturing by Direct3D and compared with GDI way. Results are not unambiguous. On my Win7 x64 with rather good video card D3D way shows ~2 times performance boost. On my WinXP 32bits laptop with not-integrated but old video card D3D works much much much longer. On another WinXP (I don't know any hardware details) D3D works almost 2 times slower.

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