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add helper/debug method to draw a palette to a bitmap

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Gered 2022-05-21 16:40:09 -04:00
parent a4e98ce108
commit 264c71677b
1 changed files with 15 additions and 0 deletions
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15
libretrogd/src/graphics/palette.rs
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@ -8,6 +8,7 @@ use byteorder::{ReadBytesExt, WriteBytesExt};
use thiserror::Error; use thiserror::Error;
use crate::NUM_COLORS; use crate::NUM_COLORS;
use crate::graphics::*;
use crate::utils::abs_diff; use crate::utils::abs_diff;
// silly "hack" (???) which allows us to alias the generic constraint `RangeBounds<u8> + Iterator<Item = u8>` to `ColorRange` // silly "hack" (???) which allows us to alias the generic constraint `RangeBounds<u8> + Iterator<Item = u8>` to `ColorRange`
@ -454,6 +455,20 @@ impl Palette {
closest closest
} }
/// Debug helper that draws this palette to the given bitmap as a 16x16 pixel grid, where each
/// pixel is one of the colors from this palette, in ascending order, left-to-right,
/// top-to-bottom. The coordinates given specify the top-left coordinate on the destination
/// bitmap to begin drawing the palette at.
pub fn draw(&self, dest: &mut Bitmap, x: i32, y: i32) {
let mut color = 0;
for yd in 0..16 {
for xd in 0..16 {
dest.set_pixel(x + xd, y + yd, color);
color = color.wrapping_add(1);
}
}
}
} }
impl Index<u8> for Palette { impl Index<u8> for Palette {