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original_height: f32,
) {
let widget_width = original_width * scale_factor;
let widget_height = original_height * scale_factor;
let swash_cache = &mut swash_cache_state.swash_cache;
let mut cursor_x = 0.;
if mode == &CosmicMode::InfiniteLine {
if let Some(line) = editor.buffer().layout_runs().next() {
for (idx, glyph) in line.glyphs.iter().enumerate() {
if editor.cursor().affinity == Affinity::Before {
if idx <= editor.cursor().index {
cursor_x += glyph.w;
}
} else if idx < editor.cursor().index {
cursor_x += glyph.w;
} else {
break;
}
}
}
}
if mode == &CosmicMode::InfiniteLine && x_offset.0.is_none() {
let padding_x = match text_position {
CosmicTextPosition::Center => get_x_offset_center(widget_width, editor.buffer()),
CosmicTextPosition::TopLeft { padding } => *padding,
CosmicTextPosition::Left { padding } => *padding,
};
*x_offset = XOffset(Some((0., widget_width - 2. * padding_x as f32)));
}
if let Some((x_min, x_max)) = x_offset.0 {
if cursor_x > x_max {
let diff = cursor_x - x_max;
*x_offset = XOffset(Some((x_min + diff, cursor_x)));
}
if cursor_x < x_min {
let diff = x_min - cursor_x;
*x_offset = XOffset(Some((cursor_x, x_max - diff)));
}
}
let font_color = attrs
.0
.color_opt
.unwrap_or(cosmic_text::Color::rgb(0, 0, 0));
let mut pixels = vec![0; widget_width as usize * widget_height as usize * 4];
if let Some(bg_image) = background_image {
if let Some(image) = images.get(&bg_image) {
let mut dynamic_image = image.clone().try_into_dynamic().unwrap();
if image.size().x != widget_width || image.size().y != widget_height {
dynamic_image = dynamic_image.resize_to_fill(
widget_width as u32,
widget_height as u32,
FilterType::Triangle,
);
}
for (i, (_, _, rgba)) in dynamic_image.pixels().enumerate() {
if let Some(p) = pixels.get_mut(i * 4..(i + 1) * 4) {
p[0] = rgba[0];
p[1] = rgba[1];
p[2] = rgba[2];
p[3] = rgba[3];
}
}
}
} else {
let bg = fill_color;
for pixel in pixels.chunks_exact_mut(4) {
pixel[0] = (bg.r() * 255.) as u8; // Red component
pixel[1] = (bg.g() * 255.) as u8; // Green component
pixel[2] = (bg.b() * 255.) as u8; // Blue component
pixel[3] = (bg.a() * 255.) as u8; // Alpha component
}
}
let (padding_x, padding_y) = match text_position {
CosmicTextPosition::Center => (
get_x_offset_center(widget_width, editor.buffer()),
get_y_offset_center(widget_height, editor.buffer()),
),
CosmicTextPosition::TopLeft { padding } => (*padding, *padding),
CosmicTextPosition::Left { padding } => (
*padding,
get_y_offset_center(widget_height, editor.buffer()),
),
};
editor.draw(
&mut font_system.0,
swash_cache,
font_color,
|x, y, w, h, color| {
for row in 0..h as i32 {
for col in 0..w as i32 {
draw_pixel(
&mut pixels,
widget_width as i32,
widget_height as i32,
x + col + padding_x - x_offset.0.unwrap_or((0., 0.)).0 as i32,
y + row + padding_y,
color,
);
}
}
},
);
if let Some(prev_image) = images.get_mut(cosmic_canvas_img_handle) {
if *cosmic_canvas_img_handle == bevy::render::texture::DEFAULT_IMAGE_HANDLE.typed() {
let mut prev_image = prev_image.clone();
prev_image.data.clear();
prev_image.data.extend_from_slice(pixels.as_slice());
prev_image.resize(Extent3d {
width: widget_width as u32,
height: widget_height as u32,
depth_or_array_layers: 1,
});
let handle_id: HandleId = HandleId::random::<Image>();
let new_handle: Handle<Image> = Handle::weak(handle_id);
let new_handle = images.set(new_handle, prev_image);
*cosmic_canvas_img_handle = new_handle;
} else {
prev_image.data.clear();
prev_image.data.extend_from_slice(pixels.as_slice());
prev_image.resize(Extent3d {
width: widget_width as u32,
height: widget_height as u32,
depth_or_array_layers: 1,
});
}
}
editor.buffer_mut().set_redraw(false);
}
fn draw_pixel(
buffer: &mut [u8],
width: i32,
height: i32,
x: i32,
y: i32,
color: cosmic_text::Color,
) {
// TODO: perftest this fn against previous iteration
let a_a = color.a() as u32;
if a_a == 0 {
// Do not draw if alpha is zero
return;
}
if y < 0 || y >= height {
// Skip if y out of bounds
return;
}
if x < 0 || x >= width {
// Skip if x out of bounds
return;
}
let offset = (y as usize * width as usize + x as usize) * 4;
let bg = Color::rgba_u8(
buffer[offset],
buffer[offset + 1],
buffer[offset + 2],
buffer[offset + 3],
);
// TODO: if alpha is 100% or bg is empty skip blending
let fg = Color::rgba_u8(color.r(), color.g(), color.b(), color.a());
let premul = fg * Vec3::splat(color.a() as f32 / 255.0);
let out = premul + bg * (1.0 - fg.a());
buffer[offset + 2] = (out.b() * 255.0) as u8;
buffer[offset + 1] = (out.g() * 255.0) as u8;
buffer[offset] = (out.r() * 255.0) as u8;
buffer[offset + 3] = (bg.a() * 255.0) as u8;
#[cfg(target_arch = "wasm32")]
pub fn get_timestamp() -> f64 {
js_sys::Date::now()
}
#[cfg(not(target_arch = "wasm32"))]
pub fn get_timestamp() -> f64 {
use std::time::SystemTime;
use std::time::UNIX_EPOCH;
let duration = SystemTime::now().duration_since(UNIX_EPOCH).unwrap();
duration.as_millis() as f64
}
#[cfg(test)]
mod tests {
use crate::*;
fn test_spawn_cosmic_edit_system(mut commands: Commands) {
commands.spawn(CosmicEditUiBundle {
text_setter: CosmicText::OneStyle("Blah".into()),
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}
#[test]
fn test_spawn_cosmic_edit() {
let mut app = App::new();
app.add_plugins(TaskPoolPlugin::default());
app.add_plugins(AssetPlugin::default());
app.insert_resource(CosmicFontSystem(create_cosmic_font_system(
CosmicFontConfig::default(),
)));
app.add_systems(Update, test_spawn_cosmic_edit_system);
let input = Input::<KeyCode>::default();
app.insert_resource(input);
let mouse_input: Input<MouseButton> = Input::<MouseButton>::default();
app.insert_resource(mouse_input);
app.add_asset::<Image>();
app.add_event::<ReceivedCharacter>();
app.update();
let mut text_nodes_query = app.world.query::<&CosmicEditor>();
for cosmic_editor in text_nodes_query.iter(&app.world) {
insta::assert_debug_snapshot!(cosmic_editor
.0
.buffer()
.lines
.iter()
.map(|line| line.text())
.collect::<Vec<_>>());
}
}
}