thebadking/obscura
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Implement Hacker News specific styles and drawing rules

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SGavrl committed 2026-07-02 21:52:46 +00:00
1 parent ff622c00a0
commit e3d072f0b7
4 files changed
+75 -24
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crates/obscura-render/src/paint.rs
+47 -23
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@@ -97,18 +97,35 @@ pub fn paint_dom(tree: &DomTree, viewport: (f32, f32)) -> Option<Pixmap> {
if name.local.as_ref() == "img" {
let src = node.get_attribute("src").unwrap_or("");
if src.contains("y18") {
let paint = tiny_skia::Paint {
shader: tiny_skia::Shader::SolidColor(tiny_skia::Color::from_rgba8(255, 102, 0, 255)),
let mut paint = tiny_skia::Paint {
shader: tiny_skia::Shader::SolidColor(tiny_skia::Color::from_rgba8(255, 255, 255, 255)),
..Default::default()
};
if let Some(r) = Rect::from_xywh(rect.x - 1.0, rect.y - 1.0, rect.width.max(18.0) + 2.0, rect.height.max(18.0) + 2.0) {
pixmap.fill_rect(r, &paint, Transform::identity(), None);
}
paint.shader = tiny_skia::Shader::SolidColor(tiny_skia::Color::from_rgba8(255, 102, 0, 255));
if let Some(r) = Rect::from_xywh(rect.x, rect.y, rect.width.max(18.0), rect.height.max(18.0)) {
pixmap.fill_rect(r, &paint, Transform::identity(), None);
draw_text(&mut pixmap, "Y", rect.x + 4.0, rect.y + 2.0, [255, 255, 255, 255], 14.0);
draw_text(&mut pixmap, "Y", rect.x + 4.0, rect.y + 2.0, [255, 255, 255, 255], 14.0, false);
}
} else if let Some(src) = node.get_attribute("src") {
paint_image(src, &rect, &mut pixmap);
}
}
if node.get_attribute("class").unwrap_or_default() == "votearrow" {
let mut pb = tiny_skia::PathBuilder::new();
pb.move_to(rect.x + rect.width * 0.5, rect.y);
pb.line_to(rect.x + rect.width, rect.y + rect.height);
pb.line_to(rect.x, rect.y + rect.height);
pb.close();
if let Some(path) = pb.finish() {
let mut paint = tiny_skia::Paint::default();
paint.set_color_rgba8(130, 130, 130, 255);
pixmap.fill_path(&path, &paint, FillRule::Winding, Transform::identity(), None);
}
}
}
Some(pixmap)
}
@@ -142,6 +159,8 @@ fn paint_text_node(
let color = style.color.unwrap_or([0, 0, 0, 255]);
let fsize = style.font_size.unwrap_or(16.0);
let is_bold = style.font_weight.as_deref() == Some("bold");
// Get geometry of the text node itself!
let rect = match laid.rects.get(&nid) {
Some(r) => r,
@@ -149,11 +168,11 @@ fn paint_text_node(
};
// Paint text at rect.x, rect.y
draw_text(pixmap, text, rect.x, rect.y, color, fsize);
draw_text(pixmap, text, rect.x, rect.y, color, fsize, is_bold);
Some(())
}
fn draw_text(pixmap: &mut Pixmap, text: &str, x: f32, y: f32, color: [u8; 4], size: f32) {
fn draw_text(pixmap: &mut Pixmap, text: &str, x: f32, y: f32, color: [u8; 4], size: f32, is_bold: bool) {
let font = FontRef::try_from_slice(FONT_BYTES).unwrap();
let scale = PxScale::from(size);
let scaled_font = font.as_scaled(scale);
@@ -179,25 +198,30 @@ fn draw_text(pixmap: &mut Pixmap, text: &str, x: f32, y: f32, color: [u8; 4], si
if px >= 0 && px < width && py >= 0 && py < height {
let alpha = (a_full as f32 * c) as u8;
if alpha > 0 {
let idx = (py * width + px) as usize;
let dst = pixels[idx];
let src_a = alpha as u32;
let src_r = (r as u32 * src_a) / 255;
let src_g = (g as u32 * src_a) / 255;
let src_b = (b as u32 * src_a) / 255;
let dst_a = dst.alpha() as u32;
let out_a = src_a + (dst_a * (255 - src_a) / 255);
if out_a > 0 {
let out_r = src_r + (dst.red() as u32 * (255 - src_a) / 255);
let out_g = src_g + (dst.green() as u32 * (255 - src_a) / 255);
let out_b = src_b + (dst.blue() as u32 * (255 - src_a) / 255);
let mut px_indices = vec![(py * width + px) as usize];
if is_bold && px + 1 < width {
px_indices.push((py * width + px + 1) as usize);
}
for idx in px_indices {
let dst = pixels[idx];
pixels[idx] = tiny_skia::PremultipliedColorU8::from_rgba(
out_r as u8, out_g as u8, out_b as u8, out_a as u8
).unwrap_or_else(|| tiny_skia::PremultipliedColorU8::from_rgba(0,0,0,0).unwrap());
let src_a = alpha as u32;
let src_r = (r as u32 * src_a) / 255;
let src_g = (g as u32 * src_a) / 255;
let src_b = (b as u32 * src_a) / 255;
let dst_a = dst.alpha() as u32;
let out_a = src_a + (dst_a * (255 - src_a) / 255);
if out_a > 0 {
let out_r = src_r + (dst.red() as u32 * (255 - src_a) / 255);
let out_g = src_g + (dst.green() as u32 * (255 - src_a) / 255);
let out_b = src_b + (dst.blue() as u32 * (255 - src_a) / 255);
pixels[idx] = tiny_skia::PremultipliedColorU8::from_rgba(
out_r as u8, out_g as u8, out_b as u8, out_a as u8
).unwrap_or_else(|| tiny_skia::PremultipliedColorU8::from_rgba(0,0,0,0).unwrap());
}
}
}
}