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editor.0.buffer_mut().set_redraw(true);
#[allow(clippy::too_many_arguments)]
fn redraw_buffer_common(
images: &mut ResMut<Assets<Image>>,
swash_cache_state: &mut ResMut<SwashCacheState>,
editor: &mut Editor,
background_image: Option<Handle<Image>>,
background_color: Color,
cosmic_canvas_img_handle: &mut Handle<Image>,
text_position: &CosmicTextPosition,
font_system: &mut ResMut<CosmicFontSystem>,
scale_factor: f32,
original_width: f32,
original_height: f32,
) {
let width = original_width * scale_factor;
let height = original_height * scale_factor;
let swash_cache = &mut swash_cache_state.swash_cache;
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editor.shape_as_needed(&mut font_system.0);
if editor.buffer().redraw() {
println!("REDRAW");
editor
.buffer_mut()
.set_size(&mut font_system.0, width, height);
let font_color = cosmic_text::Color::rgb(0, 0, 0);
let mut pixels = vec![0; width as usize * height as usize * 4];
if let Some(bg_image) = background_image {
let image = images.get(&bg_image).unwrap();
let mut dynamic_image = image.clone().try_into_dynamic().unwrap();
if image.size().x != width || image.size().y != height {
dynamic_image =
dynamic_image.resize_to_fill(width as u32, 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 = background_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
}
}
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let (offset_y, offset_x) = match text_position {
CosmicTextPosition::Center => {
(get_y_offset(editor.buffer()), get_x_offset(editor.buffer()))
}
CosmicTextPosition::TopLeft => (0, 0),
};
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,
width as i32,
height as i32,
x + col + offset_x,
y + row + offset_y,
color,
);
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},
);
editor.buffer_mut().set_redraw(false);
println!("TRY CLEAR");
if let Some(prev_image) = images.get_mut(cosmic_canvas_img_handle) {
if *cosmic_canvas_img_handle == bevy::render::texture::DEFAULT_IMAGE_HANDLE.typed() {
println!("SWAP HANDLE");
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: width as u32,
height: 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 {
println!("CLEAR CANVAS");
prev_image.data.clear();
prev_image.data.extend_from_slice(pixels.as_slice());
prev_image.resize(Extent3d {
width: width as u32,
height: height as u32,
depth_or_array_layers: 1,
});
}
}
}
}
fn cosmic_edit_redraw_buffer_ui(
windows: Query<&Window, With<PrimaryWindow>>,
mut images: ResMut<Assets<Image>>,
mut swash_cache_state: ResMut<SwashCacheState>,
mut cosmic_edit_query: Query<(
&mut CosmicEditor,
&CosmicBackground,
&BackgroundColor,
&CosmicTextPosition,
&mut UiImage,
&Node,
&mut Visibility,
)>,
mut font_system: ResMut<CosmicFontSystem>,
for (
mut editor,
background_image,
background_color,
text_position,
mut img,
node,
mut visibility,
) in &mut cosmic_edit_query.iter_mut()
{
// provide min sizes to prevent render panic
let width = node.size().x.max(1.);
let height = node.size().y.max(1.);
redraw_buffer_common(
&mut images,
&mut swash_cache_state,
&mut editor.0,
background_image.0.clone(),
background_color.0,
text_position,
&mut font_system,
primary_window.scale_factor() as f32,
width,
height,
);
if *visibility == Visibility::Hidden
&& img.texture.clone() != bevy::render::texture::DEFAULT_IMAGE_HANDLE.typed()
{
*visibility = Visibility::Visible;
}
}
}
fn cosmic_edit_redraw_buffer(
windows: Query<&Window, With<PrimaryWindow>>,
mut images: ResMut<Assets<Image>>,
mut swash_cache_state: ResMut<SwashCacheState>,
mut cosmic_edit_query: Query<(
&mut CosmicEditor,
&Sprite,
&CosmicBackground,
&BackgroundColor,
&CosmicTextPosition,
&mut Handle<Image>,
&mut Visibility,
)>,
mut font_system: ResMut<CosmicFontSystem>,
for (
mut editor,
sprite,
background_image,
background_color,
text_position,
mut handle,
mut visibility,
) in &mut cosmic_edit_query.iter_mut()
{
// provide min sizes to prevent render panic
let width = sprite.custom_size.unwrap().x.max(1.);
let height = sprite.custom_size.unwrap().y.max(1.);
redraw_buffer_common(
&mut images,
&mut swash_cache_state,
&mut editor.0,
background_image.0.clone(),
background_color.0,
text_position,
&mut font_system,
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primary_window.scale_factor() as f32,
width,
height,
);
if *visibility == Visibility::Hidden
&& handle.clone() != bevy::render::texture::DEFAULT_IMAGE_HANDLE.typed()
{
*visibility = Visibility::Visible;
}
}
}
fn draw_pixel(
buffer: &mut [u8],
width: i32,
height: i32,
x: i32,
y: i32,
color: cosmic_text::Color,
) {
let alpha = (color.0 >> 24) & 0xFF;
if alpha == 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 mut current = buffer[offset + 2] as u32
| (buffer[offset + 1] as u32) << 8
| (buffer[offset] as u32) << 16
| (buffer[offset + 3] as u32) << 24;
if alpha >= 255 || current == 0 {
// Alpha is 100% or current is null, replace with no blending
current = color.0;
} else {
// Alpha blend with current value
let n_alpha = 255 - alpha;
let rb = ((n_alpha * (current & 0x00FF00FF)) + (alpha * (color.0 & 0x00FF00FF))) >> 8;
let ag = (n_alpha * ((current & 0xFF00FF00) >> 8))
+ (alpha * (0x01000000 | ((color.0 & 0x0000FF00) >> 8)));
current = (rb & 0x00FF00FF) | (ag & 0xFF00FF00);
}
buffer[offset + 2] = current as u8;
buffer[offset + 1] = (current >> 8) as u8;
buffer[offset] = (current >> 16) as u8;
buffer[offset + 3] = (current >> 24) as u8;
}
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// #[cfg(test)]
// mod tests {
// use bevy::prelude::*;
// use cosmic_text::{Attrs, AttrsOwned};
// use crate::*;
// fn test_spawn_cosmic_edit_system(
// mut commands: Commands,
// mut cosmic_fonts: ResMut<Assets<CosmicFont>>,
// ) {
// let cosmic_font_config = CosmicFontConfig {
// fonts_dir_path: None,
// font_bytes: None,
// load_system_fonts: true,
// };
// let font_system = create_cosmic_font_system(cosmic_font_config);
// let font_system_handle = cosmic_fonts.add(CosmicFont(font_system));
// let cosmic_edit_meta = CosmicEditMeta {
// text: CosmicText::OneStyle("Blah".to_string()),
// attrs: AttrsOwned::new(Attrs::new()),
// metrics: CosmicMetrics {
// font_size: 14.,
// line_height: 18.,
// scale_factor: 1.,
// },
// text_pos: CosmicTextPosition::Center,
// font_system_handle,
// node: CosmicNode::Ui,
// size: None,
// bg: bevy::prelude::Color::NONE,
// readonly: false,
// bg_image: None,
// };
// spawn_cosmic_edit(&mut commands, &mut cosmic_fonts, cosmic_edit_meta);
// }
// #[test]
// fn test_spawn_cosmic_edit() {
// let mut app = App::new();
// app.add_plugins(TaskPoolPlugin::default());
// app.add_plugins(AssetPlugin::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_asset::<CosmicFont>();
// app.add_event::<ReceivedCharacter>();
// app.update();
// let mut text_nodes_query = app.world.query::<&CosmicEdit>();
// for node in text_nodes_query.iter(&app.world) {
// insta::assert_debug_snapshot!(node
// .editor
// .buffer()
// .lines
// .iter()
// .map(|line| line.text())
// .collect::<Vec<_>>());
// }
// }
// }