347 lines
13 KiB
Rust
347 lines
13 KiB
Rust
use imlib2::{self, Image as Image2};
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use xlib::{Display, Visual, Window};
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use errors::ScreenshotError;
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use Options;
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use Rectangle;
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use Region;
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pub struct GUI {
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pub(crate) display: Display,
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}
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impl GUI {
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pub fn new() -> Result<Self, ScreenshotError> {
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let display = Display::connect(":0")?;
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Ok(GUI { display })
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}
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/// Captures the window and produces an Image.
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pub fn capture_window(&self, opt: &Options, window: Window) -> Result<Image2, ScreenshotError> {
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let attr = window.get_attributes()?;
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let width = attr.get_width();
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let height = attr.get_height();
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let root = attr.get_root();
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let (x, y, _) = self.display.translate_coordinates(window, 0, 0, root)?;
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imlib2::context_set_display(&self.display);
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let visual = Visual::default(&self.display, 0);
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imlib2::context_set_visual(&visual);
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if let Region::Selection = opt.region {
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let capture =
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Image2::create_from_drawable(window, 0, x, y, width as i32, height as i32, true)?;
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let region = self.interactive_select(&capture)?;
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imlib2::context_set_image(&capture);
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return imlib2::create_scaled_cropped_image(
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region.x,
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region.y,
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region.width,
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region.height,
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).map_err(|err| err.into());
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}
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Image2::create_from_drawable(window, 0, x, y, width as i32, height as i32, true)
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.map_err(|err| err.into())
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}
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/// Get the active window.
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pub fn get_active_window(&self) -> Result<Window, ScreenshotError> {
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self.display
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.get_input_focus()
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.map(|(window, _)| window)
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.map_err(|err| err.into())
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}
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/// Brings up an interactive selection GUI.
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pub fn interactive_select(&self, capture: &Image2) -> Result<Rectangle, ScreenshotError> {
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// let window = SelectWindow::new(&self.display);
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// let root = self.display.get_default_root_window()?;
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// let root_im = root.get_image();
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// let mut done = 0;
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// let mut button_press = false;
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// while done == 0 && self.display.pending()? > 0 {
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// let ev = self.display.next_event()?;
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// match ev.kind() {
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// EventKind::ButtonPress => {
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// button_press = true;
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// }
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// EventKind::ButtonRelease => {
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// if button_press {
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// done = 1;
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// }
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// button_press = false;
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// }
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// _ => (),
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// }
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// }
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use gl;
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use glutin::{
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self,
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dpi::{PhysicalPosition, PhysicalSize},
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os::unix::{WindowBuilderExt, WindowExt, XWindowType},
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ElementState, Event, EventsLoop, GlContext, GlWindow, KeyboardInput, MouseButton,
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MouseCursor, VirtualKeyCode, WindowBuilder, WindowEvent,
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};
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use nanovg::{self, Image, ImagePattern, PathOptions, StrokeOptions};
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use x11;
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use std::{f32::consts, mem, slice};
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// let attr = window.get_attributes()?;
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// let width = attr.get_width();
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// let height = attr.get_height();
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// let root = attr.get_root();
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// let (x, y, _) = self.display.translate_coordinates(window, 0, 0, root)?;
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let width = capture.get_width();
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let height = capture.get_height();
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let mut evl = EventsLoop::new();
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let mon = evl.get_primary_monitor();
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// TODO: handle error
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let wb = WindowBuilder::new()
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.with_x11_window_type(XWindowType::Splash)
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.with_decorations(false)
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.with_visibility(false)
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.with_always_on_top(true)
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.with_dimensions(
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PhysicalSize::new(width.into(), height.into()).to_logical(mon.get_hidpi_factor()),
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).with_fullscreen(Some(mon));
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let ctx = glutin::ContextBuilder::new()
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.with_vsync(false)
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.with_multisampling(4)
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.with_double_buffer(Some(true))
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.with_srgb(true);
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let win = GlWindow::new(wb, ctx, &evl).expect("couldn't make window");
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win.set_position((0.0, 0.0).into());
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let f = win.get_hidpi_factor() as f64;
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// crosshair
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win.set_cursor(MouseCursor::Crosshair);
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// win.set_inner_size((width, height).into());
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// println!("size={:?} pos={:?} outer={:?}", win.get_inner_size(), win.get_inner_position(), win.get_outer_size());
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// println!("{:?}", win.get_hidpi_factor());
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let x = Display::from_handle(win.get_xlib_display().unwrap() as u64);
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let len;
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let raw_data;
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{
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let _g = x.grab();
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// let img = Image2::create_from_drawable(window, 0, 0, 0, width as i32, height as i32, true)?;
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imlib2::context_set_image(&capture);
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len = (width * height) as usize;
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// println!("{}", window.as_raw());
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raw_data = unsafe { slice::from_raw_parts(imlib2::image_get_data(), len) };
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unsafe {
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win.make_current().expect("couldn't make window");
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gl::load_with(|sym| win.get_proc_address(sym) as *const _);
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}
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}
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mem::forget(x);
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// convert ARGB to RGBA
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let mut data = vec![0u32; raw_data.len()];
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data.copy_from_slice(raw_data);
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for i in &mut data {
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// fix the colors
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*i = (*i & 0xff00ff00) | ((*i & 0xff) << 16) | ((*i >> 16) & 0xff);
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}
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// invert image
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let mut inverted = vec![0u32; raw_data.len()];
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inverted.copy_from_slice(raw_data);
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for i in &mut inverted {
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// fix the colors
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*i = (*i & 0xff000000) | !(*i & 0xffffff);
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}
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let ctx = nanovg::ContextBuilder::new()
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.build()
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.expect("couldn't init nanovg");
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let image = Image::new(&ctx)
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.build_from_rgba(width as usize, height as usize, data.as_slice())
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.expect("couldn't create image");
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let inverted_image = Image::new(&ctx)
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.build_from_rgba(width as usize, height as usize, inverted.as_slice())
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.expect("couldn't create image");
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let mut running = true;
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let mut down = false;
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// drag start
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let mut dx = -1.0f64;
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let mut dy = -1.0f64;
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// curr mouse
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let mut mx = -1.0f64;
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let mut my = -1.0f64;
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// rect
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let mut rectw = 0.0f64;
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let mut recth = 0.0f64;
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let mut delayed_down = false;
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let mut redraw = true;
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win.show();
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win.set_position(PhysicalPosition::new(0.0, 0.0).to_logical(f));
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while running {
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if redraw {
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// let size = win.get_inner_size().unwrap();
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// let (width, height) = (size.width as i32, size.height as i32);
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unsafe {
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gl::Viewport(0, 0, width as i32, height as i32);
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gl::ClearColor(0.3, 0.3, 0.32, 1.0);
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gl::Clear(gl::COLOR_BUFFER_BIT | gl::DEPTH_BUFFER_BIT | gl::STENCIL_BUFFER_BIT);
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}
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let (width, height) = (width as f64, height as f64);
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ctx.frame((width as f32, height as f32), f as f32, |frame| {
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let path_opts = PathOptions::default();
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frame.path(
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|path| {
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path.rect((0.0, 0.0), ((width * f) as f32, (height * f) as f32));
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// path.fill(Color::from_rgba(200, 200, 200, 255), Default::default());
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path.fill(
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ImagePattern {
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image: &image,
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origin: (0.0, 0.0),
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size: (width as f32, height as f32),
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angle: 0.0 / 180.0 * consts::PI,
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alpha: 1.0,
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},
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Default::default(),
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)
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},
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path_opts,
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);
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if down && rectw.abs() > 0.0 && recth.abs() > 0.0 {
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frame.path(
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|path| {
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path.rect(
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((dx * f) as f32, (dy * f) as f32),
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((rectw * f) as f32, (recth * f) as f32),
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);
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path.stroke(
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// Color::from_rgba(0, 0, 0, 255),
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ImagePattern {
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image: &inverted_image,
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origin: (0.0, 0.0),
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size: (width as f32, height as f32),
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angle: 0.0 / 180.0 * consts::PI,
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alpha: 1.0,
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},
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StrokeOptions {
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width: 1.0,
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..Default::default()
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},
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);
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},
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path_opts,
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);
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}
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});
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}
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evl.poll_events(|event| match event {
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Event::WindowEvent { event, .. } => match event {
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WindowEvent::Destroyed => running = false,
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WindowEvent::KeyboardInput {
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input:
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KeyboardInput {
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virtual_keycode,
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state,
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..
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},
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..
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} => match (virtual_keycode, state) {
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(Some(VirtualKeyCode::Escape), ElementState::Released) => {
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if down {
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down = false;
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rectw = 0.0;
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recth = 0.0;
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} else {
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unsafe {
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x11::xlib::XDestroyWindow(
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self.display.as_raw(),
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win.get_xlib_window().unwrap(),
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)
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};
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running = false;
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}
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}
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_ => (),
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},
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WindowEvent::CursorMoved { position, .. } => {
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mx = position.x;
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my = position.y;
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if down {
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if delayed_down {
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dx = mx;
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dy = my;
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delayed_down = false;
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} else {
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redraw = true;
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}
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rectw = mx - dx;
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recth = my - dy;
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}
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}
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WindowEvent::MouseInput { button, state, .. } => match button {
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MouseButton::Left => {
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down = match state {
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ElementState::Pressed => {
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delayed_down = true;
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if mx < 0.0 || my < 0.0 {
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} else {
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dx = mx;
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dy = my;
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}
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true
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}
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ElementState::Released => {
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if down && rectw.abs() > 0.0 && recth.abs() > 0.0 {
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unsafe {
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x11::xlib::XDestroyWindow(
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self.display.as_raw(),
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win.get_xlib_window().unwrap(),
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)
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};
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running = false;
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}
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false
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}
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};
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}
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_ => (),
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},
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_ => (),
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},
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_ => (),
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});
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win.swap_buffers().expect("couldn't swap buffers");
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}
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if rectw.abs() > 0.0 && recth.abs() > 0.0 {
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let mut x = dx;
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let mut y = dy;
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if rectw < 0.0 {
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x += rectw;
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}
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if recth < 0.0 {
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y += recth;
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}
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Ok(Rectangle::new(
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(x * f) as i32,
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(y * f) as i32,
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(rectw.abs() * f) as u32,
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(recth.abs() * f) as u32,
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))
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} else {
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Err(ScreenshotError::Error)
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}
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}
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}
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