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OpenGL Screensaver

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first you can use the glReadPixels() read the Screen's image,
then you can save the data as any format as you like.

for example:
CIMAGE screenshot;

//allocate the memory
screenshot.Create( m_iWidth+10, m_iHeight, 24 );

//read the screen data
glReadPixels( 0, 0, m_iWidth+10, m_iHeight, GL_RGB, GL_UNSIGNED_BYTE, screenshot.GetData( ) );

//write the image data
screenshot.Save( szFilename );

if you are interesting in the detail of CIMAGE, you can email to me.

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