Add a pen which paints glow effects
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084a558740
commit
bce5659ceb
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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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@ -175,11 +184,8 @@ impl SplashPrivate {
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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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title_cutout.draw(&pen);
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pen.stroke();
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}
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{
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@ -200,7 +206,6 @@ impl SplashPrivate {
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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 +215,8 @@ 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 +230,14 @@ 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 +403,7 @@ 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 +411,17 @@ 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 +429,20 @@ 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 +450,7 @@ 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 +468,7 @@ 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 +476,13 @@ 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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@ -551,6 +560,80 @@ 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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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,
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blur_size,
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}
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}
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}
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impl Pen for GlowPen {
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fn move_to(&self, x: f64, y: f64) {
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self.blur_context.move_to(x, y);
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self.draw_context.move_to(x, y);
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}
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fn line_to(&self, x: f64, y: f64) {
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self.blur_context.line_to(x, y);
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self.draw_context.line_to(x, y);
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}
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fn stroke(&self) {
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self.blur_context.stroke();
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self.draw_context.stroke();
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}
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fn finish(self) -> Pattern {
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let foreground = self.draw_context.pop_group().unwrap();
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self.blur_context.set_source(foreground).unwrap();
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self.blur_context.paint().unwrap();
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self.blur_context.pop_group().unwrap()
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}
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}
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fn main() {
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let app = gtk::Application::builder()
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.application_id("com.luminescent-dreams.cyberpunk-splash")
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