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draw_rect refactor.

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This commit is contained in:
Mark Tomlin 2023-12-25 14:58:29 -05:00 • committed by Jeremy Soller
parent aecb80eaed
commit 47aad59fe4
1 changed files with 53 additions and 34 deletions
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87
src/text_box.rs
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@ -98,15 +98,22 @@ where
TextBox::new(editor, metrics)
}
struct Canvas {
w: i32,
h: i32,
}
struct Offset {
x: i32,
y: i32,
}
//TODO: improve performance
fn draw_rect(
buffer: &mut [u32],
image_w: i32,
image_h: i32,
start_x: i32,
start_y: i32,
w: i32,
h: i32,
canvas: Canvas,
offset: Canvas,
start: Offset,
cosmic_color: cosmic_text::Color,
) {
// Grab alpha channel and green channel
@ -121,15 +128,15 @@ fn draw_rect(
// Do not draw if alpha is zero
} else if alpha >= 255 {
// Handle overwrite
for y in start_y..start_y + h {
if y < 0 || y >= image_h {
for y in start.y..start.y + offset.h {
if y < 0 || y >= canvas.h {
// Skip if y out of bounds
continue;
}
let line_offset = y as usize * image_w as usize;
for x in start_x..start_x + w {
if x < 0 || x >= image_w {
let line_offset = y as usize * canvas.w as usize;
for x in start.x..start.x + offset.w {
if x < 0 || x >= canvas.w {
// Skip if x out of bounds
continue;
}
@ -140,15 +147,15 @@ fn draw_rect(
}
} else {
let n_alpha = 255 - alpha;
for y in start_y..start_y + h {
if y < 0 || y >= image_h {
for y in start.y..start.y + offset.h {
if y < 0 || y >= canvas.h {
// Skip if y out of bounds
continue;
}
let line_offset = y as usize * image_w as usize;
for x in start_x..start_x + w {
if x < 0 || x >= image_w {
let line_offset = y as usize * canvas.w as usize;
for x in start.x..start.x + offset.w {
if x < 0 || x >= canvas.w {
// Skip if x out of bounds
continue;
}
@ -384,12 +391,15 @@ where
// Ensure fill with gutter color
draw_rect(
pixels,
image_w,
image_h,
0,
0,
editor_offset_x,
image_h,
Canvas {
w: image_w,
h: image_h,
},
Canvas {
w: editor_offset_x,
h: image_h,
},
Offset { x: 0, y: 0 },
gutter,
);
@ -437,12 +447,15 @@ where
|x, y, color| {
draw_rect(
pixels,
image_w,
image_h,
physical_glyph.x + x,
physical_glyph.y + y,
1,
1,
Canvas {
w: image_w,
h: image_h,
},
Canvas { w: 1, h: 1 },
Offset {
x: physical_glyph.x + x,
y: physical_glyph.y + y,
},
color,
);
},
@ -457,12 +470,18 @@ where
editor.draw(&mut font_system, &mut swash_cache, |x, y, w, h, color| {
draw_rect(
pixels,
image_w,
image_h,
editor_offset_x + x,
y,
w as i32,
h as i32,
Canvas {
w: image_w,
h: image_h,
},
Canvas {
w: w as i32,
h: h as i32,
},
Offset {
x: editor_offset_x + x,
y,
},
color,
);
});