Add a glow effect to the cyberpunk-splash line drawing #48
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@ -143,6 +143,15 @@ impl SplashPrivate {
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}
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fn redraw_background(&self) {
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let pen = GlowPen::new(
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*self.width.borrow(),
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*self.height.borrow(),
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2.,
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8.,
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8.,
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(0.7, 0., 1.),
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);
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let background =
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ImageSurface::create(Format::Rgb24, *self.width.borrow(), *self.height.borrow())
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.unwrap();
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@ -152,55 +161,89 @@ impl SplashPrivate {
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let _ = context.paint();
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context.select_font_face("Alegreya Sans SC", FontSlant::Normal, FontWeight::Bold);
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context.set_font_size(128.);
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let center_x = *self.width.borrow() as f64 / 2.;
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let center_y = *self.height.borrow() as f64 / 2.;
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let title_extents = context.text_extents(&self.text.borrow()).unwrap();
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let title_width = title_extents.width();
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let title_height = title_extents.height();
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{
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let start_length = center_x - title_width / 2. - title_height - 20.;
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context.set_source_rgb(0.7, 0., 1.);
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let title_cutout = AsymLineCutout {
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let hashtag = "#CodingTogether";
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context.set_font_size(64.);
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let extents = context.text_extents(hashtag).unwrap();
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context.move_to(20., extents.height() + 40.);
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let _ = context.show_text(hashtag);
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AsymLine {
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orientation: gtk::Orientation::Horizontal,
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start_x: 10.,
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start_y: extents.height() + 10.,
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start_length: 0.,
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height: extents.height() / 2.,
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total_length: extents.width() + extents.height() / 2.,
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invert: false,
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}
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.draw(&pen);
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pen.stroke();
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AsymLine {
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orientation: gtk::Orientation::Horizontal,
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start_x: 20.,
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start_y: center_y - 20. - title_height / 2.,
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start_length,
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total_length: *self.width.borrow() as f64 - 120.,
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cutout_length: title_width,
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height: title_height,
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start_y: extents.height() + 60.,
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start_length: extents.width(),
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height: extents.height() / 2.,
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total_length: extents.width() + extents.height() / 2.,
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invert: false,
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};
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context.set_line_cap(LineCap::Round);
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context.set_source_rgb(0.7, 0., 1.);
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context.set_line_width(2.);
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title_cutout.draw(&context);
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let _ = context.stroke();
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}
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.draw(&pen);
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pen.stroke();
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}
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{
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let title_baseline_x = center_x - title_width / 2.;
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let title_baseline_y = center_y - 20.;
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context.set_font_size(128.);
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let gradient = LinearGradient::new(
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title_baseline_x,
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title_baseline_y - title_height,
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title_baseline_x,
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title_baseline_y,
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);
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gradient.add_color_stop_rgb(0.2, 0.7, 0.0, 1.0);
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gradient.add_color_stop_rgb(0.8, 0.2, 0.0, 1.0);
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context.move_to(title_baseline_x, title_baseline_y);
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let _ = context.set_source(gradient);
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let _ = context.show_text(&self.text.borrow());
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let center_x = *self.width.borrow() as f64 / 2.;
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let center_y = *self.height.borrow() as f64 / 2.;
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let title_extents = context.text_extents(&self.text.borrow()).unwrap();
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let title_width = title_extents.width();
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let title_height = title_extents.height();
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{
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let start_length = center_x - title_width / 2. - title_height - 20.;
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let title_cutout = AsymLineCutout {
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orientation: gtk::Orientation::Horizontal,
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start_x: 20.,
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start_y: center_y - 20. - title_height / 2.,
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start_length,
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total_length: *self.width.borrow() as f64 - 120.,
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cutout_length: title_width,
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height: title_height,
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invert: false,
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};
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title_cutout.draw(&pen);
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pen.stroke();
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}
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{
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let title_baseline_x = center_x - title_width / 2.;
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let title_baseline_y = center_y - 20.;
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let gradient = LinearGradient::new(
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title_baseline_x,
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title_baseline_y - title_height,
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title_baseline_x,
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title_baseline_y,
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);
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gradient.add_color_stop_rgb(0.2, 0.7, 0.0, 1.0);
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gradient.add_color_stop_rgb(0.8, 0.2, 0.0, 1.0);
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context.move_to(title_baseline_x, title_baseline_y);
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let _ = context.set_source(gradient);
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let _ = context.show_text(&self.text.borrow());
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}
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}
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{
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context.set_source_rgb(0.7, 0., 1.);
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AsymLine {
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orientation: gtk::Orientation::Horizontal,
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start_x: 100.,
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@ -210,8 +253,8 @@ impl SplashPrivate {
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total_length: 650.,
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invert: true,
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}
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.draw(&context);
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let _ = context.stroke();
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.draw(&pen);
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pen.stroke();
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}
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{
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@ -225,10 +268,14 @@ impl SplashPrivate {
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total_length: 650.,
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invert: false,
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}
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.draw(&context);
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let _ = context.stroke();
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.draw(&pen);
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pen.stroke();
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}
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let tracery = pen.finish();
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let _ = context.set_source(tracery);
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let _ = context.paint();
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let background = context.pop_group().unwrap();
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*self.background.borrow_mut() = background;
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@ -394,7 +441,7 @@ struct AsymLineCutout {
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}
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impl AsymLineCutout {
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fn draw(&self, context: &Context) {
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fn draw(&self, pen: &impl Pen) {
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let dodge = if self.invert {
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self.height
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} else {
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@ -402,17 +449,17 @@ impl AsymLineCutout {
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};
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match self.orientation {
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gtk::Orientation::Horizontal => {
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context.move_to(self.start_x, self.start_y);
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context.line_to(self.start_x + self.start_length, self.start_y);
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context.line_to(
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pen.move_to(self.start_x, self.start_y);
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pen.line_to(self.start_x + self.start_length, self.start_y);
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pen.line_to(
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self.start_x + self.start_length + self.height,
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self.start_y + dodge,
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);
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context.line_to(
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pen.line_to(
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self.start_x + self.start_length + self.height + self.cutout_length,
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self.start_y + dodge,
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);
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context.line_to(
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pen.line_to(
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self.start_x
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+ self.start_length
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+ self.height
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@ -420,20 +467,20 @@ impl AsymLineCutout {
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+ (self.height / 2.),
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self.start_y + dodge / 2.,
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);
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context.line_to(self.total_length, self.start_y + dodge / 2.);
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pen.line_to(self.total_length, self.start_y + dodge / 2.);
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}
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gtk::Orientation::Vertical => {
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context.move_to(self.start_x, self.start_y);
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context.line_to(self.start_x, self.start_y + self.start_length);
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context.line_to(
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pen.move_to(self.start_x, self.start_y);
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pen.line_to(self.start_x, self.start_y + self.start_length);
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pen.line_to(
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self.start_x + dodge,
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self.start_y + self.start_length + self.height,
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);
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context.line_to(
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pen.line_to(
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self.start_x + dodge,
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self.start_y + self.start_length + self.height + self.cutout_length,
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);
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context.line_to(
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pen.line_to(
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self.start_x + dodge / 2.,
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self.start_y
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+ self.start_length
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@ -441,7 +488,7 @@ impl AsymLineCutout {
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+ self.cutout_length
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+ (self.height / 2.),
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);
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context.line_to(self.start_x + dodge / 2., self.total_length);
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pen.line_to(self.start_x + dodge / 2., self.total_length);
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}
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_ => panic!("unknown orientation"),
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}
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@ -459,7 +506,7 @@ struct AsymLine {
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}
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impl AsymLine {
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fn draw(&self, context: &Context) {
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fn draw(&self, pen: &impl Pen) {
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let dodge = if self.invert {
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self.height
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} else {
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@ -467,13 +514,13 @@ impl AsymLine {
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};
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match self.orientation {
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gtk::Orientation::Horizontal => {
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context.move_to(self.start_x, self.start_y);
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context.line_to(self.start_x + self.start_length, self.start_y);
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context.line_to(
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pen.move_to(self.start_x, self.start_y);
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pen.line_to(self.start_x + self.start_length, self.start_y);
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pen.line_to(
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self.start_x + self.start_length + self.height,
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self.start_y + dodge,
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);
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context.line_to(self.start_x + self.total_length, self.start_y + dodge);
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pen.line_to(self.start_x + self.total_length, self.start_y + dodge);
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}
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gtk::Orientation::Vertical => {}
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_ => panic!("unknown orientation"),
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@ -481,36 +528,6 @@ impl AsymLine {
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}
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}
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struct RoundedRectangle {
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x: f64,
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y: f64,
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width: f64,
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height: f64,
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}
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impl RoundedRectangle {
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fn draw(&self, context: &Context) {
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context.arc(
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self.x,
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self.y - self.height / 2.,
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self.height / 2.,
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0.5 * std::f64::consts::PI,
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1.5 * std::f64::consts::PI,
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);
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let _ = context.fill();
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context.arc(
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self.x + self.width,
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self.y - self.height / 2.,
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self.height / 2.,
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1.5 * std::f64::consts::PI,
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0.5 * std::f64::consts::PI,
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);
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let _ = context.fill();
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context.rectangle(self.x, self.y, self.width, -self.height);
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let _ = context.fill();
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}
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}
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struct SlashMeter {
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orientation: gtk::Orientation,
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start_x: f64,
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@ -551,6 +568,80 @@ impl SlashMeter {
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}
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}
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trait Pen {
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fn move_to(&self, x: f64, y: f64);
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fn line_to(&self, x: f64, y: f64);
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fn stroke(&self);
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fn finish(self) -> Pattern;
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}
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struct GlowPen {
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blur_context: Context,
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draw_context: Context,
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line_width: f64,
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blur_line_width: f64,
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||||
blur_size: f64,
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}
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impl GlowPen {
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fn new(
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||||
width: i32,
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||||
height: i32,
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||||
line_width: f64,
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||||
blur_line_width: f64,
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blur_size: f64,
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color: (f64, f64, f64),
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) -> Self {
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||||
let blur_context =
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Context::new(ImageSurface::create(Format::Rgb24, width, height).unwrap()).unwrap();
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blur_context.set_line_width(blur_line_width);
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||||
blur_context.set_source_rgba(color.0, color.1, color.2, 0.5);
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||||
blur_context.push_group();
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||||
blur_context.set_line_cap(LineCap::Round);
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||||
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||||
let draw_context =
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||||
Context::new(ImageSurface::create(Format::Rgb24, width, height).unwrap()).unwrap();
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||||
draw_context.set_line_width(line_width);
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||||
draw_context.set_source_rgb(color.0, color.1, color.2);
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||||
draw_context.push_group();
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draw_context.set_line_cap(LineCap::Round);
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Self {
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||||
blur_context,
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||||
draw_context,
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||||
line_width,
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||||
blur_line_width,
|
||||
blur_size,
|
||||
}
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||||
}
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||||
}
|
||||
|
||||
impl Pen for GlowPen {
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||||
fn move_to(&self, x: f64, y: f64) {
|
||||
self.blur_context.move_to(x, y);
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||||
self.draw_context.move_to(x, y);
|
||||
}
|
||||
|
||||
fn line_to(&self, x: f64, y: f64) {
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||||
self.blur_context.line_to(x, y);
|
||||
self.draw_context.line_to(x, y);
|
||||
}
|
||||
|
||||
fn stroke(&self) {
|
||||
self.blur_context.stroke();
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||||
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() {
|
||||
let app = gtk::Application::builder()
|
||||
.application_id("com.luminescent-dreams.cyberpunk-splash")
|
||||
|
|
|
|||
Loading…
Reference in New Issue