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So the short answer to my own question is, "Yes." The long answer is... Using Metal—and, I assume, OpenGL ES—you can create no-copy data buffers from memory-mapped files on disk. From there, you can create textures from those buffers. There are constraints, however, in that the texture data must be an uncompressed pixel format, can only have one mipmap ...


Tiles and icons (even in UIs like window systems) are often in a size like 16x16 or 24x24 to make it easier to modify the tiles. Most times the tile size is a multiple of 8 because of the folowing reasons. It is relatively easy to shrink a tile with the size 32x32 to 16x16 by simply putting 4 pixels together (e.g. create the median/average of the 4 ...

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