|pow2integer||The scale factor to use (1, no scale, 2, half scale, 4, quarter scale, etc...)|
This function allows you to control the scaling of the texture pages on load from the WAD file that is part of your final game executable. The input value must be a power of two value and will work such that:
In this way you can better control texture page memory usage on
platforms with low memory issues. Note that textures pages are
created on demand from the WAD, and so you can either call this at
the start of the game to load all textures scaled, or you can call
it at specific times to load specific textures, in which case you'd
probably want to call draw_texture_flush before
calling this function, then use the pre-fetch functions to get the
correct texture pages into memory.
The above code will flush all textures from memory, then set the texture scaling to 2 (so texture pages are half size) and then finally pre-fetch the texture page that the sprite "spr_Trees" is contained within.