From f8ffb92f2857677e4a9986ef154800ddb2e233fd Mon Sep 17 00:00:00 2001
From: Dylan <boss@tehbox.org>
Date: Thu, 25 Jun 2026 13:42:49 +1200
Subject: feat: Added conversion between different color types and depths

---
 src/image.rs | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 58 insertions(+), 5 deletions(-)

(limited to 'src/image.rs')

diff --git a/src/image.rs b/src/image.rs
index ab5dc99..9b42b27 100644
--- a/src/image.rs
+++ b/src/image.rs
@@ -2,18 +2,31 @@ use std::ops;
 
 use crate::{reader::FileReader, writer::FileWriter};
 
+type FullColorDepth = u32;
 pub trait ColorDepth: Clone
 {
 	const DEFAULT: Self;
+	fn from_full_color(x: FullColorDepth) -> Self;
+	fn to_full_color(&self) -> FullColorDepth;
+	fn convert<T: ColorDepth>(&self) -> T
+	{
+		T::from_full_color(self.to_full_color())
+	}
 }
 impl ColorDepth for u8 {
     const DEFAULT: Self = 0;
+    fn from_full_color(x: FullColorDepth) -> Self {(x>>24) as Self}
+    fn to_full_color(&self) -> FullColorDepth { (*self as FullColorDepth) << 24 }
 }
 impl ColorDepth for u16 {
     const DEFAULT: Self = 0;
+    fn from_full_color(x: FullColorDepth) -> Self {(x>>16) as Self}
+	fn to_full_color(&self) -> FullColorDepth { (*self as FullColorDepth) << 16 }
 }
 impl ColorDepth for u32 {
     const DEFAULT: Self = 0;
+    fn from_full_color(x: FullColorDepth) -> Self {x}
+	fn to_full_color(&self) -> FullColorDepth { *self }
 }
 
 #[derive(Debug, Clone, Copy)]
@@ -32,17 +45,57 @@ pub struct RGB<T: ColorDepth>
 	pub b: T,
 }
 
+type FullColorPixel = RGBA<FullColorDepth>;
 pub trait ColorType: Clone
 {
 	const DEFAULT: Self;
+	fn from_full_color(x: FullColorPixel) -> Self;
+	fn to_full_color(&self) -> FullColorPixel;
+	fn convert<T: ColorType>(&self) -> T
+	{
+		T::from_full_color(self.to_full_color())
+	}
 }
 impl<T: ColorDepth> ColorType for RGBA<T>
 {
 	const DEFAULT: Self = Self { r: T::DEFAULT, g: T::DEFAULT, b: T::DEFAULT, a: T::DEFAULT };
+	fn from_full_color(x: FullColorPixel) -> Self {
+		Self
+		{
+			r: T::from_full_color(x.r),
+			g: T::from_full_color(x.g),
+			b: T::from_full_color(x.b),
+			a: T::from_full_color(x.a),
+		}
+	}
+	fn to_full_color(&self) -> FullColorPixel {
+		RGBA {
+			r: T::to_full_color(&self.r),
+			g: T::to_full_color(&self.g),
+			b: T::to_full_color(&self.b),
+			a: T::to_full_color(&self.a),
+		}
+    }
 }
 impl<T: ColorDepth> ColorType for RGB<T>
 {
 	const DEFAULT: Self = Self { r: T::DEFAULT, g: T::DEFAULT, b: T::DEFAULT};
+	fn from_full_color(x: FullColorPixel) -> Self {
+		Self
+		{
+			r: T::from_full_color(x.r),
+			g: T::from_full_color(x.g),
+			b: T::from_full_color(x.b)
+		}
+	}
+	fn to_full_color(&self) -> FullColorPixel {
+		RGBA {
+			r: T::to_full_color(&self.r),
+			g: T::to_full_color(&self.g),
+			b: T::to_full_color(&self.b),
+			a: u32::max_value()
+		}
+    }
 }
 
 #[derive(Debug)]
@@ -76,14 +129,14 @@ impl<T: ColorType> ops::IndexMut<(usize, usize)> for PixelArr<T>
 }
 
 #[derive(Debug)]
-pub struct ImageBase
+pub struct ImageBase<T: ColorType>
 {
 	pub bit_depth: u8,
-	pub pixels: PixelArr<RGB<u8>>
+	pub pixels: PixelArr<T>
 }
 
-pub trait Image
+pub trait Image<T: ColorType>
 {
-	fn read_image(reader: &mut FileReader) -> Result<ImageBase, &'static str>;
-	fn write_image(image: &ImageBase, writer: &mut FileWriter)-> ();
+	fn read_image(reader: &mut FileReader) -> Result<ImageBase<T>, &'static str>;
+	fn write_image(image: &ImageBase<T>, writer: &mut FileWriter)-> ();
 }
-- 
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