glRasterPos2f(-1,-1);
glDrawPixels(640,480,GL_RGB,GL_UNSIGNED_BYTE,View.DataP());
Slow OpenGL backdrop...
Author
I''m using a windowed OpenGL app and using
glDrawPixels() is just a very slow command, and you''ll have to learn to live with that. Directly writing to the framebuffer is not recommended, so you''ll have to deal with it in a slightly different way.
What you can do is decompress your video data (640x480) to a 1024x512 buffer. This wastes some memory, but you can use that buffer as a texture, and you can then display the video by rendering a single texturemapped quad that fills your window. For best performance, use glCopyTexSubImage2D() to update only the 640x480 portion of the texture for every frame.
- Tom
What you can do is decompress your video data (640x480) to a 1024x512 buffer. This wastes some memory, but you can use that buffer as a texture, and you can then display the video by rendering a single texturemapped quad that fills your window. For best performance, use glCopyTexSubImage2D() to update only the 640x480 portion of the texture for every frame.
- Tom
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