add RgbaBitmap blended drawing primitives

ggdt/src/graphics/bitmap/rgb/mod.rs

@@ -5,6 +5,7 @@ use crate::graphics::color::to_rgb32;
 use crate::graphics::palette::Palette;
 
 pub mod blit;
+pub mod primitives;
 
 pub type RgbaBitmap = Bitmap<u32>;
 

ggdt/src/graphics/bitmap/rgb/primitives.rs

@@ -0,0 +1,85 @@
+use crate::graphics::bitmap::rgb::RgbaBitmap;
+use crate::graphics::color::BlendFunction;
+
+impl RgbaBitmap {
+	/// Sets the pixel at the given coordinates using a blended color via the specified blend function
+	/// If the coordinates lie outside of the bitmaps clipping region, no pixels will be changed.
+	#[inline]
+	pub fn set_blended_pixel(&mut self, x: i32, y: i32, color: u32, blend: BlendFunction) {
+		self.set_custom_pixel(
+			x, y,
+			|dest_color| {
+				blend.blend(color, dest_color)
+			}
+		);
+	}
+
+	/// Sets the pixel at the given coordinates using a blended color via the specified blend function,
+	/// The coordinates are not checked for validity, so it is up to you to ensure they lie within the
+	/// bounds of the bitmap.
+	#[inline]
+	pub unsafe fn set_blended_pixel_unchecked(&mut self, x: i32, y: i32, color: u32, blend: BlendFunction) {
+		self.set_custom_pixel_unchecked(
+			x, y,
+			|dest_color| {
+				blend.blend(color, dest_color)
+			}
+		);
+	}
+
+	/// Draws a line from x1,y1 to x2,y2 by blending the drawn pixels using the given blend function.
+	pub fn blended_line(&mut self, x1: i32, y1: i32, x2: i32, y2: i32, color: u32, blend: BlendFunction) {
+		self.line_custom(
+			x1, y1, x2, y2,
+			|dest_color| {
+				blend.blend(color, dest_color)
+			}
+		);
+	}
+
+	/// Draws a horizontal line from x1,y to x2,y by blending the drawn pixels using the given
+	/// blend function.
+	pub fn blended_horiz_line(&mut self, x1: i32, x2: i32, y: i32, color: u32, blend: BlendFunction) {
+		self.horiz_line_custom(
+			x1, x2, y,
+			|dest_color| {
+				blend.blend(color, dest_color)
+			}
+		);
+	}
+
+	/// Draws a vertical line from x,y1 to x,y2 by blending the drawn pixels using the given blend
+	/// function.
+	pub fn blended_vert_line(&mut self, x: i32, y1: i32, y2: i32, color: u32, blend: BlendFunction) {
+		self.vert_line_custom(
+			x, y1, y2,
+			|dest_color| {
+				blend.blend(color, dest_color)
+			}
+		);
+	}
+
+	/// Draws an empty box (rectangle) using the points x1,y1 and x2,y2 to form the box to be
+	/// drawn, assuming they are specifying the top-left and bottom-right corners respectively.
+	/// The box is drawn by blending the drawn pixels using the given blend function.
+	pub fn blended_rect(&mut self, x1: i32, y1: i32, x2: i32, y2: i32, color: u32, blend: BlendFunction) {
+		self.rect_custom(
+			x1, y1, x2, y2,
+			|dest_color| {
+				blend.blend(color, dest_color)
+			}
+		);
+	}
+
+	/// Draws a filled box (rectangle) using the points x1,y1 and x2,y2 to form the box to be
+	/// drawn, assuming they are specifying the top-left and bottom-right corners respectively. The
+	/// filled box is draw by blending the drawn pixels using the given blend function.
+	pub fn blended_filled_rect(&mut self, x1: i32, y1: i32, x2: i32, y2: i32, color: u32, blend: BlendFunction) {
+		self.filled_rect_custom(
+			x1, y1, x2, y2,
+			|dest_color| {
+				blend.blend(color, dest_color)
+			}
+		);
+	}
+}

ggdt/src/graphics/prelude.rs

@@ -17,6 +17,7 @@ pub use crate::graphics::{
 		rgb::{
 			*,
 			blit::*,
+			primitives::*,
 		},
 	},
 	bitmapatlas::*,