If your texture is larger than the screen: (eg 2048x2048)
Just split it into parts fitting your screen... then do what GfK said (but displaced so the part you want to alter is drawn on the screen)
Afterwards just paste the pixmaps into the textures pixmap.
Remember: this is in no way a thing for realtime displayment.
PS: don't forget to displace the text too (-x and -y so the already drawn parts of the text will be "out of sight" too).
bye MB
Just split it into parts fitting your screen... then do what GfK said (but displaced so the part you want to alter is drawn on the screen)
Afterwards just paste the pixmaps into the textures pixmap.
Remember: this is in no way a thing for realtime displayment.
PS: don't forget to displace the text too (-x and -y so the already drawn parts of the text will be "out of sight" too).
bye MB