feat: Add additional color conversions for tinybmp support (#16)

feat: add additional color conversions for tinybmp support
avsaase · Aug 22, 2024 · 712d3b5 · 712d3b5
1 parent bdb2825
commit 712d3b5
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Showing 3 changed files with 63 additions and 3 deletions.
diff --git a/examples/rp2040/Cargo.lock b/examples/rp2040/Cargo.lock
diff --git a/examples/stm32g431/Cargo.lock b/examples/stm32g431/Cargo.lock
diff --git a/src/color.rs b/src/color.rs
@@ -1,5 +1,5 @@
 #[cfg(feature = "graphics")]
-use embedded_graphics::pixelcolor::{BinaryColor, Rgb888, RgbColor};
+use embedded_graphics::pixelcolor::{BinaryColor, Rgb888, RgbColor, Rgb565, Rgb555};
 use sealed::sealed;
 
 /// Color definition for B/W displays
@@ -50,6 +50,66 @@ impl From<Rgb888> for Color {
     }
 }
 
+/// Conversion from Rgb565 to use `Color` with tinybmp
+#[cfg(feature = "graphics")]
+impl From<Rgb565> for Color {
+    fn from(rgb: Rgb565) -> Self {
+        if rgb == RgbColor::BLACK {
+            Color::White
+        } else if rgb == RgbColor::WHITE {
+            Color::Black
+        } else {
+            // choose closest color
+            if (rgb.r() as u16 + rgb.g() as u16 + rgb.b() as u16) > 255 * 3 / 2 {
+                Color::Black
+            } else {
+                Color::White
+            }
+        }
+    }
+}
+
+/// Conversion to Rgb565 to use `Color` with tinybmp
+#[cfg(feature = "graphics")]
+impl From<Color> for Rgb565 {
+    fn from(color: Color) -> Self {
+        match color {
+            Color::Black => Self::WHITE,
+            Color::White => Self::BLACK,
+        }
+    }
+}
+
+/// Conversion from Rgb555 to use `Color` with tinybmp
+#[cfg(feature = "graphics")]
+impl From<Rgb555> for Color {
+    fn from(rgb: Rgb555) -> Self {
+        if rgb == RgbColor::BLACK {
+            Color::White
+        } else if rgb == RgbColor::WHITE {
+            Color::Black
+        } else {
+            // choose closest color
+            if (rgb.r() as u16 + rgb.g() as u16 + rgb.b() as u16) > 255 * 3 / 2 {
+                Color::Black
+            } else {
+                Color::White
+            }
+        }
+    }
+}
+
+/// Conversion to Rgb555 to use `Color` with tinybmp
+#[cfg(feature = "graphics")]
+impl From<Color> for Rgb555 {
+    fn from(color: Color) -> Self {
+        match color {
+            Color::Black => Self::WHITE,
+            Color::White => Self::BLACK,
+        }
+    }
+}
+
 /// Color for tri-color displays
 #[derive(Debug, Clone, Copy, PartialEq, Default)]
 pub enum TriColor {