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better writing

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Lokathor 2018-11-20 03:18:41 -07:00
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6
book/src/ch03/tile_data.md
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@ -11,8 +11,8 @@ need to arrange several tiles so that it looks like whatever you're trying to
draw. draw.
As was already mentioned, the GBA supports two different color modes: 4 bits per As was already mentioned, the GBA supports two different color modes: 4 bits per
pixel and 8 bits per pixel. So already we have two types of tile that we need to pixel and 8 bits per pixel. This means that we have two types of tile that we
model. The pixel bits always represent an index into the PALRAM. need to model. The pixel bits always represent an index into the PALRAM.
* With 4 bits per pixel, the PALRAM is imagined to be 16 **palbank** sections of * With 4 bits per pixel, the PALRAM is imagined to be 16 **palbank** sections of
16 palette entries each. The image data selects the index within the palbank, 16 palette entries each. The image data selects the index within the palbank,
@ -20,7 +20,7 @@ model. The pixel bits always represent an index into the PALRAM.
* With 8 bits per pixel, the PALRAM is imagined to be a single 256 entry array * With 8 bits per pixel, the PALRAM is imagined to be a single 256 entry array
and the index just directly picks which of the 256 colors is used. and the index just directly picks which of the 256 colors is used.
So, already we have some Rust types we can define: Knowing this, we can write the following definitions:
```rust ```rust
#[derive(Debug, Clone, Copy, Default)] #[derive(Debug, Clone, Copy, Default)]