Add a glow effect to the cyberpunk-splash line drawing #48

Merged
savanni merged 2 commits from neon-glow into main 2023-07-26 13:59:22 +00:00
1 changed files with 111 additions and 28 deletions
Showing only changes of commit dfe05f86ae - Show all commits

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@ -143,6 +143,15 @@ impl SplashPrivate {
} }
fn redraw_background(&self) { fn redraw_background(&self) {
let pen = GlowPen::new(
*self.width.borrow(),
*self.height.borrow(),
2.,
8.,
8.,
(0.7, 0., 1.),
);
let background = let background =
ImageSurface::create(Format::Rgb24, *self.width.borrow(), *self.height.borrow()) ImageSurface::create(Format::Rgb24, *self.width.borrow(), *self.height.borrow())
.unwrap(); .unwrap();
@ -175,11 +184,8 @@ impl SplashPrivate {
invert: false, invert: false,
}; };
context.set_line_cap(LineCap::Round); title_cutout.draw(&pen);
context.set_source_rgb(0.7, 0., 1.); pen.stroke();
context.set_line_width(2.);
title_cutout.draw(&context);
let _ = context.stroke();
} }
{ {
@ -200,7 +206,6 @@ impl SplashPrivate {
} }
{ {
context.set_source_rgb(0.7, 0., 1.);
AsymLine { AsymLine {
orientation: gtk::Orientation::Horizontal, orientation: gtk::Orientation::Horizontal,
start_x: 100., start_x: 100.,
@ -210,8 +215,8 @@ impl SplashPrivate {
total_length: 650., total_length: 650.,
invert: true, invert: true,
} }
.draw(&context); .draw(&pen);
let _ = context.stroke(); pen.stroke();
} }
{ {
@ -225,10 +230,14 @@ impl SplashPrivate {
total_length: 650., total_length: 650.,
invert: false, invert: false,
} }
.draw(&context); .draw(&pen);
let _ = context.stroke(); pen.stroke();
} }
let tracery = pen.finish();
let _ = context.set_source(tracery);
let _ = context.paint();
let background = context.pop_group().unwrap(); let background = context.pop_group().unwrap();
*self.background.borrow_mut() = background; *self.background.borrow_mut() = background;
@ -394,7 +403,7 @@ struct AsymLineCutout {
} }
impl AsymLineCutout { impl AsymLineCutout {
fn draw(&self, context: &Context) { fn draw(&self, pen: &impl Pen) {
let dodge = if self.invert { let dodge = if self.invert {
self.height self.height
} else { } else {
@ -402,17 +411,17 @@ impl AsymLineCutout {
}; };
match self.orientation { match self.orientation {
gtk::Orientation::Horizontal => { gtk::Orientation::Horizontal => {
context.move_to(self.start_x, self.start_y); pen.move_to(self.start_x, self.start_y);
context.line_to(self.start_x + self.start_length, self.start_y); pen.line_to(self.start_x + self.start_length, self.start_y);
context.line_to( pen.line_to(
self.start_x + self.start_length + self.height, self.start_x + self.start_length + self.height,
self.start_y + dodge, self.start_y + dodge,
); );
context.line_to( pen.line_to(
self.start_x + self.start_length + self.height + self.cutout_length, self.start_x + self.start_length + self.height + self.cutout_length,
self.start_y + dodge, self.start_y + dodge,
); );
context.line_to( pen.line_to(
self.start_x self.start_x
+ self.start_length + self.start_length
+ self.height + self.height
@ -420,20 +429,20 @@ impl AsymLineCutout {
+ (self.height / 2.), + (self.height / 2.),
self.start_y + dodge / 2., self.start_y + dodge / 2.,
); );
context.line_to(self.total_length, self.start_y + dodge / 2.); pen.line_to(self.total_length, self.start_y + dodge / 2.);
} }
gtk::Orientation::Vertical => { gtk::Orientation::Vertical => {
context.move_to(self.start_x, self.start_y); pen.move_to(self.start_x, self.start_y);
context.line_to(self.start_x, self.start_y + self.start_length); pen.line_to(self.start_x, self.start_y + self.start_length);
context.line_to( pen.line_to(
self.start_x + dodge, self.start_x + dodge,
self.start_y + self.start_length + self.height, self.start_y + self.start_length + self.height,
); );
context.line_to( pen.line_to(
self.start_x + dodge, self.start_x + dodge,
self.start_y + self.start_length + self.height + self.cutout_length, self.start_y + self.start_length + self.height + self.cutout_length,
); );
context.line_to( pen.line_to(
self.start_x + dodge / 2., self.start_x + dodge / 2.,
self.start_y self.start_y
+ self.start_length + self.start_length
@ -441,7 +450,7 @@ impl AsymLineCutout {
+ self.cutout_length + self.cutout_length
+ (self.height / 2.), + (self.height / 2.),
); );
context.line_to(self.start_x + dodge / 2., self.total_length); pen.line_to(self.start_x + dodge / 2., self.total_length);
} }
_ => panic!("unknown orientation"), _ => panic!("unknown orientation"),
} }
@ -459,7 +468,7 @@ struct AsymLine {
} }
impl AsymLine { impl AsymLine {
fn draw(&self, context: &Context) { fn draw(&self, pen: &impl Pen) {
let dodge = if self.invert { let dodge = if self.invert {
self.height self.height
} else { } else {
@ -467,13 +476,13 @@ impl AsymLine {
}; };
match self.orientation { match self.orientation {
gtk::Orientation::Horizontal => { gtk::Orientation::Horizontal => {
context.move_to(self.start_x, self.start_y); pen.move_to(self.start_x, self.start_y);
context.line_to(self.start_x + self.start_length, self.start_y); pen.line_to(self.start_x + self.start_length, self.start_y);
context.line_to( pen.line_to(
self.start_x + self.start_length + self.height, self.start_x + self.start_length + self.height,
self.start_y + dodge, self.start_y + dodge,
); );
context.line_to(self.start_x + self.total_length, self.start_y + dodge); pen.line_to(self.start_x + self.total_length, self.start_y + dodge);
} }
gtk::Orientation::Vertical => {} gtk::Orientation::Vertical => {}
_ => panic!("unknown orientation"), _ => panic!("unknown orientation"),
@ -551,6 +560,80 @@ impl SlashMeter {
} }
} }
trait Pen {
fn move_to(&self, x: f64, y: f64);
fn line_to(&self, x: f64, y: f64);
fn stroke(&self);
fn finish(self) -> Pattern;
}
struct GlowPen {
blur_context: Context,
draw_context: Context,
line_width: f64,
blur_line_width: f64,
blur_size: f64,
}
impl GlowPen {
fn new(
width: i32,
height: i32,
line_width: f64,
blur_line_width: f64,
blur_size: f64,
color: (f64, f64, f64),
) -> Self {
let blur_context =
Context::new(ImageSurface::create(Format::Rgb24, width, height).unwrap()).unwrap();
blur_context.set_line_width(blur_line_width);
blur_context.set_source_rgba(color.0, color.1, color.2, 0.5);
blur_context.push_group();
blur_context.set_line_cap(LineCap::Round);
let draw_context =
Context::new(ImageSurface::create(Format::Rgb24, width, height).unwrap()).unwrap();
draw_context.set_line_width(line_width);
draw_context.set_source_rgb(color.0, color.1, color.2);
draw_context.push_group();
draw_context.set_line_cap(LineCap::Round);
Self {
blur_context,
draw_context,
line_width,
blur_line_width,
blur_size,
}
}
}
impl Pen for GlowPen {
fn move_to(&self, x: f64, y: f64) {
self.blur_context.move_to(x, y);
self.draw_context.move_to(x, y);
}
fn line_to(&self, x: f64, y: f64) {
self.blur_context.line_to(x, y);
self.draw_context.line_to(x, y);
}
fn stroke(&self) {
self.blur_context.stroke();
self.draw_context.stroke();
}
fn finish(self) -> Pattern {
let foreground = self.draw_context.pop_group().unwrap();
self.blur_context.set_source(foreground).unwrap();
self.blur_context.paint().unwrap();
self.blur_context.pop_group().unwrap()
}
}
fn main() { fn main() {
let app = gtk::Application::builder() let app = gtk::Application::builder()
.application_id("com.luminescent-dreams.cyberpunk-splash") .application_id("com.luminescent-dreams.cyberpunk-splash")