mirror of
https://github.com/slint-ui/slint.git
synced 2025-08-31 07:37:24 +00:00
2d2eb70b51
When using repeaters - like in the slide puzzle - and during renderer a component gets deleted, we call free_graphics_resources and try to free the dirty rectangle list in the partial renderer cache. At that point the cache is already mutably borrowed, which causes a panic. As remedy, apply the mutable borrow more fine grained and not right when calling render().
861 lines
33 KiB
Rust
861 lines
33 KiB
Rust
// Copyright © SixtyFPS GmbH <info@slint-ui.com>
|
|
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-commercial
|
|
|
|
mod draw_functions;
|
|
pub mod fonts;
|
|
|
|
use crate::graphics::{FontRequest, IntRect, PixelFormat, Rect as RectF};
|
|
use crate::item_rendering::{ItemRenderer, PartialRenderingCache};
|
|
use crate::items::{ImageFit, ItemRc};
|
|
use crate::lengths::{
|
|
LogicalItemGeometry, LogicalLength, LogicalPoint, LogicalRect, PhysicalLength, PhysicalPoint,
|
|
PhysicalPx, PhysicalRect, PhysicalSize, PointLengths, RectLengths, ScaleFactor, SizeLengths,
|
|
};
|
|
use crate::textlayout::{FontMetrics as _, TextParagraphLayout};
|
|
use crate::{Color, Coord, ImageInner, StaticTextures};
|
|
use alloc::rc::Rc;
|
|
use alloc::{vec, vec::Vec};
|
|
use core::cell::RefCell;
|
|
use core::pin::Pin;
|
|
pub use draw_functions::TargetPixel;
|
|
|
|
type DirtyRegion = PhysicalRect;
|
|
|
|
pub trait LineBufferProvider {
|
|
/// The pixel type of the buffer
|
|
type TargetPixel: TargetPixel;
|
|
|
|
/// Called before the frame is being drawn, with the dirty region. Return the actual dirty region
|
|
///
|
|
/// The default implementation simply returns the dirty_region
|
|
fn set_dirty_region(&mut self, dirty_region: PhysicalRect) -> PhysicalRect {
|
|
dirty_region
|
|
}
|
|
|
|
/// Called once per line, you will have to call the render_fn back with the buffer.
|
|
fn process_line(
|
|
&mut self,
|
|
line: PhysicalLength,
|
|
render_fn: impl FnOnce(&mut [Self::TargetPixel]),
|
|
);
|
|
}
|
|
|
|
#[derive(Default)]
|
|
pub struct LineRenderer {
|
|
partial_cache: RefCell<crate::item_rendering::PartialRenderingCache>,
|
|
}
|
|
|
|
impl LineRenderer {
|
|
/// Render the window, line by line, into the buffer provided by the `line_buffer` function.
|
|
///
|
|
/// The renderer uses a cache internally and will only render the part of the window
|
|
/// which are dirty. The `initial_dirty_region` is an extra dirty regin which will also
|
|
/// be rendered.
|
|
///
|
|
/// TODO: the window should be the public slint::Window type
|
|
/// TODO: what about async and threading.
|
|
/// (can we call the line_buffer function from different thread?)
|
|
/// TODO: should `initial_dirty_region` be set from a different call?
|
|
pub fn render(
|
|
&self,
|
|
window: Rc<crate::window::Window>,
|
|
initial_dirty_region: crate::item_rendering::DirtyRegion,
|
|
line_buffer: impl LineBufferProvider,
|
|
) {
|
|
let component_rc = window.component();
|
|
let component = crate::component::ComponentRc::borrow_pin(&component_rc);
|
|
if let Some(window_item) = crate::items::ItemRef::downcast_pin::<crate::items::WindowItem>(
|
|
component.as_ref().get_item_ref(0),
|
|
) {
|
|
let size = euclid::size2(window_item.width() as f32, window_item.height() as f32)
|
|
* ScaleFactor::new(window.scale_factor());
|
|
render_window_frame(
|
|
window,
|
|
window_item.background(),
|
|
size.cast(),
|
|
initial_dirty_region,
|
|
&self.partial_cache,
|
|
line_buffer,
|
|
);
|
|
}
|
|
}
|
|
|
|
pub fn free_graphics_resources(
|
|
&self,
|
|
items: &mut dyn Iterator<Item = Pin<crate::items::ItemRef<'_>>>,
|
|
) {
|
|
for item in items {
|
|
let cache_entry =
|
|
item.cached_rendering_data_offset().release(&mut self.partial_cache.borrow_mut());
|
|
drop(cache_entry);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn render_window_frame(
|
|
runtime_window: Rc<crate::window::Window>,
|
|
background: Color,
|
|
size: PhysicalSize,
|
|
initial_dirty_region: crate::item_rendering::DirtyRegion,
|
|
cache: &RefCell<PartialRenderingCache>,
|
|
mut line_buffer: impl LineBufferProvider,
|
|
) {
|
|
let mut scene =
|
|
prepare_scene(runtime_window, size, initial_dirty_region, &mut line_buffer, cache);
|
|
|
|
let dirty_region = scene.dirty_region;
|
|
|
|
debug_assert!(scene.current_line >= dirty_region.origin.y_length());
|
|
while scene.current_line < dirty_region.origin.y_length() + dirty_region.size.height_length() {
|
|
line_buffer.process_line(scene.current_line, |line_buffer| {
|
|
TargetPixel::blend_buffer(&mut line_buffer[dirty_region.min_x() as usize..dirty_region.max_x() as usize] , background);
|
|
|
|
for span in scene.items[0..scene.current_items_index].iter().rev() {
|
|
debug_assert!(scene.current_line >= span.pos.y_length());
|
|
debug_assert!(scene.current_line < span.pos.y_length() + span.size.height_length(),);
|
|
match span.command {
|
|
SceneCommand::Rectangle { color } => {
|
|
TargetPixel::blend_buffer(
|
|
&mut line_buffer[span.pos.x as usize
|
|
..(span.pos.x_length() + span.size.width_length()).get() as usize],
|
|
color,
|
|
);
|
|
}
|
|
SceneCommand::Texture { texture_index } => {
|
|
let texture = &scene.textures[texture_index as usize];
|
|
draw_functions::draw_texture_line(
|
|
span,
|
|
scene.current_line,
|
|
texture,
|
|
line_buffer,
|
|
);
|
|
}
|
|
SceneCommand::RoundedRectangle { rectangle_index } => {
|
|
let rr = &scene.rounded_rectangles[rectangle_index as usize];
|
|
draw_functions::draw_rounded_rectangle_line(
|
|
span,
|
|
scene.current_line,
|
|
rr,
|
|
line_buffer,
|
|
);
|
|
}
|
|
}
|
|
}
|
|
});
|
|
|
|
if scene.current_line < dirty_region.origin.y_length() + dirty_region.size.height_length() {
|
|
scene.next_line();
|
|
}
|
|
}
|
|
}
|
|
|
|
struct Scene {
|
|
/// the next line to be processed
|
|
current_line: PhysicalLength,
|
|
|
|
/// The items are sorted like so:
|
|
/// - `items[future_items_index..]` are the items that have `y > current_line`.
|
|
/// They must be sorted by `y` (top to bottom), then by `z` (front to back)
|
|
/// - `items[..current_items_index]` are the items that overlap with the current_line,
|
|
/// sorted by z (front to back)
|
|
items: Vec<SceneItem>,
|
|
|
|
future_items_index: usize,
|
|
current_items_index: usize,
|
|
|
|
textures: Vec<SceneTexture>,
|
|
rounded_rectangles: Vec<RoundedRectangle>,
|
|
dirty_region: DirtyRegion,
|
|
}
|
|
|
|
impl Scene {
|
|
pub fn new(
|
|
mut items: Vec<SceneItem>,
|
|
textures: Vec<SceneTexture>,
|
|
rounded_rectangles: Vec<RoundedRectangle>,
|
|
dirty_region: DirtyRegion,
|
|
) -> Self {
|
|
let current_line = dirty_region.origin.y_length();
|
|
items.retain(|i| i.pos.y_length() + i.size.height_length() > current_line);
|
|
items.sort_unstable_by(|a, b| compare_scene_item(a, b));
|
|
let current_items_index = items.partition_point(|i| i.pos.y_length() <= current_line);
|
|
items[..current_items_index].sort_unstable_by(|a, b| b.z.cmp(&a.z));
|
|
Self {
|
|
items,
|
|
current_line,
|
|
current_items_index,
|
|
future_items_index: current_items_index,
|
|
textures,
|
|
rounded_rectangles,
|
|
dirty_region,
|
|
}
|
|
}
|
|
|
|
/// Updates `current_items_index` and `future_items_index` to match the invariant
|
|
pub fn next_line(&mut self) {
|
|
self.current_line += PhysicalLength::new(1);
|
|
|
|
// The items array is split in part:
|
|
// 1. [0..i] are the items that have already been processed, that are on this line
|
|
// 2. [j..current_items_index] are the items from the previous line that might still be
|
|
// valid on this line
|
|
// 3. [tmp1, tmp2] is a buffer where we swap items so we can make room for the items in [0..i]
|
|
// 4. [future_items_index..] are the items which might get processed now
|
|
// 5. [current_items_index..tmp1], [tmp2..future_items_index] and [i..j] is garbage
|
|
//
|
|
// At each step, we selecting the item with the higher z from the list 2 or 3 or 4 and take it from
|
|
// that list. Then we add it to the list [0..i] if it needs more processing. If needed,
|
|
// we move the first item from list 2. to list 3. to make some room
|
|
|
|
let (mut i, mut j, mut tmp1, mut tmp2) =
|
|
(0, 0, self.current_items_index, self.current_items_index);
|
|
|
|
'outer: loop {
|
|
let future_next_z = self
|
|
.items
|
|
.get(self.future_items_index)
|
|
.filter(|i| i.pos.y_length() <= self.current_line)
|
|
.map(|i| i.z);
|
|
let item = loop {
|
|
if tmp1 != tmp2 {
|
|
if future_next_z.map_or(true, |z| self.items[tmp1].z > z) {
|
|
let idx = tmp1;
|
|
tmp1 += 1;
|
|
if tmp1 == tmp2 {
|
|
tmp1 = self.current_items_index;
|
|
tmp2 = self.current_items_index;
|
|
}
|
|
break self.items[idx];
|
|
}
|
|
} else if j < self.current_items_index {
|
|
let item = &self.items[j];
|
|
if item.pos.y_length() + item.size.height_length() <= self.current_line {
|
|
j += 1;
|
|
continue;
|
|
}
|
|
if future_next_z.map_or(true, |z| item.z > z) {
|
|
j += 1;
|
|
break *item;
|
|
}
|
|
}
|
|
if future_next_z.is_some() {
|
|
self.future_items_index += 1;
|
|
break self.items[self.future_items_index - 1];
|
|
}
|
|
break 'outer;
|
|
};
|
|
if i != j {
|
|
// there is room
|
|
} else if j >= self.current_items_index && tmp1 == tmp2 {
|
|
// the current_items list is empty
|
|
j += 1
|
|
} else if self.items[j].pos.y_length() + self.items[j].size.height_length()
|
|
<= self.current_line
|
|
{
|
|
// next item in the current_items array is no longer in this line
|
|
j += 1;
|
|
} else if tmp2 < self.future_items_index && j < self.current_items_index {
|
|
// move the next item in current_items
|
|
let to_move = self.items[j];
|
|
self.items[tmp2] = to_move;
|
|
j += 1;
|
|
tmp2 += 1;
|
|
} else {
|
|
debug_assert!(tmp1 >= self.current_items_index);
|
|
let sort_begin = i;
|
|
// merge sort doesn't work because we don't have enough tmp space, just bring all items and use a normal sort.
|
|
while j < self.current_items_index {
|
|
let item = self.items[j];
|
|
if item.pos.y_length() + item.size.height_length() > self.current_line {
|
|
self.items[i] = item;
|
|
i += 1;
|
|
}
|
|
j += 1;
|
|
}
|
|
self.items.copy_within(tmp1..tmp2, i);
|
|
i += tmp2 - tmp1;
|
|
debug_assert!(i < self.future_items_index);
|
|
self.items[i] = item;
|
|
i += 1;
|
|
while self.future_items_index < self.items.len() {
|
|
let item = self.items[self.future_items_index];
|
|
if item.pos.y_length() > self.current_line {
|
|
break;
|
|
}
|
|
self.items[i] = item;
|
|
i += 1;
|
|
self.future_items_index += 1;
|
|
}
|
|
self.items[sort_begin..i].sort_unstable_by(|a, b| b.z.cmp(&a.z));
|
|
break;
|
|
}
|
|
self.items[i] = item;
|
|
i += 1;
|
|
}
|
|
self.current_items_index = i;
|
|
// check that current items are properly sorted
|
|
debug_assert!(self.items[0..self.current_items_index].windows(2).all(|x| x[0].z >= x[1].z));
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Copy, Debug)]
|
|
struct SceneItem {
|
|
pos: PhysicalPoint,
|
|
size: PhysicalSize,
|
|
// this is the order of the item from which it is in the item tree
|
|
z: u16,
|
|
command: SceneCommand,
|
|
}
|
|
|
|
fn compare_scene_item(a: &SceneItem, b: &SceneItem) -> core::cmp::Ordering {
|
|
// First, order by line (top to bottom)
|
|
match a.pos.y.partial_cmp(&b.pos.y) {
|
|
None | Some(core::cmp::Ordering::Equal) => {}
|
|
Some(ord) => return ord,
|
|
}
|
|
// Then by the reverse z (front to back)
|
|
match a.z.partial_cmp(&b.z) {
|
|
None | Some(core::cmp::Ordering::Equal) => {}
|
|
Some(ord) => return ord.reverse(),
|
|
}
|
|
|
|
// anything else, we don't care
|
|
core::cmp::Ordering::Equal
|
|
}
|
|
|
|
#[derive(Clone, Copy, Debug)]
|
|
#[repr(u8)]
|
|
enum SceneCommand {
|
|
Rectangle {
|
|
color: Color,
|
|
},
|
|
/// texture_index is an index in the Scene::textures array
|
|
Texture {
|
|
texture_index: u16,
|
|
},
|
|
/// rectangle_index is an index in the Scene::rounded_rectangle array
|
|
RoundedRectangle {
|
|
rectangle_index: u16,
|
|
},
|
|
}
|
|
|
|
struct SceneTexture {
|
|
data: &'static [u8],
|
|
format: PixelFormat,
|
|
/// bytes between two lines in the source
|
|
stride: u16,
|
|
source_size: PhysicalSize,
|
|
color: Color,
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
struct RoundedRectangle {
|
|
radius: PhysicalLength,
|
|
/// the border's width
|
|
width: PhysicalLength,
|
|
border_color: Color,
|
|
inner_color: Color,
|
|
/// The clips is the amount of pixels of the rounded rectangle that is clipped away.
|
|
/// For example, if left_clip > width, then the left border will not be visible, and
|
|
/// if left_clip > radius, then no radius will be seen in the left side
|
|
left_clip: PhysicalLength,
|
|
right_clip: PhysicalLength,
|
|
top_clip: PhysicalLength,
|
|
bottom_clip: PhysicalLength,
|
|
}
|
|
|
|
fn prepare_scene(
|
|
runtime_window: Rc<crate::window::Window>,
|
|
size: PhysicalSize,
|
|
initial_dirty_region: crate::item_rendering::DirtyRegion,
|
|
line_buffer: &mut impl LineBufferProvider,
|
|
cache: &RefCell<PartialRenderingCache>,
|
|
) -> Scene {
|
|
let factor = ScaleFactor::new(runtime_window.scale_factor());
|
|
let prepare_scene = PrepareScene::new(size, factor, runtime_window.default_font_properties());
|
|
let mut renderer =
|
|
crate::item_rendering::PartialRenderer::new(cache, initial_dirty_region, prepare_scene);
|
|
|
|
let mut dirty_region = PhysicalRect::default();
|
|
runtime_window.draw_contents(|components| {
|
|
for (component, origin) in components {
|
|
renderer.compute_dirty_regions(component, *origin);
|
|
}
|
|
|
|
dirty_region = (LogicalRect::from_untyped(&renderer.dirty_region.to_rect()).cast()
|
|
* factor)
|
|
.round_out()
|
|
.cast()
|
|
.intersection(&PhysicalRect { origin: euclid::point2(0, 0), size })
|
|
.unwrap_or_default();
|
|
dirty_region = line_buffer.set_dirty_region(dirty_region);
|
|
|
|
renderer.combine_clip((dirty_region.cast() / factor).to_untyped().cast(), 0 as _, 0 as _);
|
|
for (component, origin) in components {
|
|
crate::item_rendering::render_component_items(component, &mut renderer, *origin);
|
|
}
|
|
});
|
|
|
|
let prepare_scene = renderer.into_inner();
|
|
Scene::new(
|
|
prepare_scene.items,
|
|
prepare_scene.textures,
|
|
prepare_scene.rounded_rectangles,
|
|
dirty_region,
|
|
)
|
|
}
|
|
|
|
struct PrepareScene {
|
|
items: Vec<SceneItem>,
|
|
textures: Vec<SceneTexture>,
|
|
rounded_rectangles: Vec<RoundedRectangle>,
|
|
state_stack: Vec<RenderState>,
|
|
current_state: RenderState,
|
|
scale_factor: ScaleFactor,
|
|
default_font: FontRequest,
|
|
}
|
|
|
|
impl PrepareScene {
|
|
fn new(size: PhysicalSize, scale_factor: ScaleFactor, default_font: FontRequest) -> Self {
|
|
Self {
|
|
items: vec![],
|
|
rounded_rectangles: vec![],
|
|
textures: vec![],
|
|
state_stack: vec![],
|
|
current_state: RenderState {
|
|
alpha: 1.,
|
|
offset: LogicalPoint::default(),
|
|
clip: LogicalRect::new(
|
|
LogicalPoint::default(),
|
|
(size.cast() / scale_factor).cast(),
|
|
),
|
|
},
|
|
scale_factor,
|
|
default_font,
|
|
}
|
|
}
|
|
|
|
fn should_draw(&self, rect: &LogicalRect) -> bool {
|
|
!rect.size.is_empty()
|
|
&& self.current_state.alpha > 0.01
|
|
&& self.current_state.clip.intersects(rect)
|
|
}
|
|
|
|
fn new_scene_texture(&mut self, geometry: PhysicalRect, texture: SceneTexture) {
|
|
let size = geometry.size;
|
|
if !size.is_empty() {
|
|
let texture_index = self.textures.len() as u16;
|
|
self.textures.push(texture);
|
|
self.items.push(SceneItem {
|
|
pos: geometry.origin,
|
|
size,
|
|
z: self.items.len() as u16,
|
|
command: SceneCommand::Texture { texture_index },
|
|
});
|
|
}
|
|
}
|
|
|
|
fn new_scene_item(&mut self, geometry: LogicalRect, command: SceneCommand) {
|
|
let geometry = (geometry.translate(self.current_state.offset.to_vector()).cast()
|
|
* self.scale_factor)
|
|
.round()
|
|
.cast();
|
|
let size = geometry.size;
|
|
if !size.is_empty() {
|
|
let z = self.items.len() as u16;
|
|
let pos = geometry.origin;
|
|
self.items.push(SceneItem { pos, size, z, command });
|
|
}
|
|
}
|
|
|
|
fn draw_image_impl(
|
|
&mut self,
|
|
geom: LogicalRect,
|
|
source: &crate::graphics::Image,
|
|
mut source_rect: IntRect,
|
|
image_fit: ImageFit,
|
|
colorize: Color,
|
|
) {
|
|
let image_inner: &ImageInner = source.into();
|
|
match image_inner {
|
|
ImageInner::None => (),
|
|
ImageInner::AbsoluteFilePath(_) | ImageInner::EmbeddedData { .. } => {
|
|
unimplemented!()
|
|
}
|
|
ImageInner::EmbeddedImage(_) => todo!(),
|
|
ImageInner::StaticTextures(StaticTextures { data, textures, .. }) => {
|
|
let size: euclid::default::Size2D<u32> = source_rect.size.cast();
|
|
let phys_size = geom.size_length().cast() * self.scale_factor;
|
|
let source_to_target_x = phys_size.width / (size.width as f32);
|
|
let source_to_target_y = phys_size.height / (size.height as f32);
|
|
let mut image_fit_offset = euclid::Vector2D::default();
|
|
let (source_to_target_x, source_to_target_y) = match image_fit {
|
|
ImageFit::fill => (source_to_target_x, source_to_target_y),
|
|
ImageFit::cover => {
|
|
let ratio = f32::max(source_to_target_x, source_to_target_y);
|
|
if size.width as f32 > phys_size.width / ratio {
|
|
let diff = (size.width as f32 - phys_size.width / ratio) as i32;
|
|
source_rect.origin.x += diff / 2;
|
|
source_rect.size.width -= diff;
|
|
}
|
|
if size.height as f32 > phys_size.height / ratio {
|
|
let diff = (size.height as f32 - phys_size.height / ratio) as i32;
|
|
source_rect.origin.y += diff / 2;
|
|
source_rect.size.height -= diff;
|
|
}
|
|
(ratio, ratio)
|
|
}
|
|
ImageFit::contain => {
|
|
let ratio = f32::min(source_to_target_x, source_to_target_y);
|
|
if (size.width as f32) < phys_size.width / ratio {
|
|
image_fit_offset.x = (phys_size.width - size.width as f32 * ratio) / 2.;
|
|
}
|
|
if (size.height as f32) < phys_size.height / ratio {
|
|
image_fit_offset.y =
|
|
(phys_size.height - size.height as f32 * ratio) / 2.;
|
|
}
|
|
(ratio, ratio)
|
|
}
|
|
};
|
|
|
|
let offset = self.current_state.offset.to_vector().cast() * self.scale_factor
|
|
+ image_fit_offset;
|
|
|
|
let renderer_clip_in_source_rect_space = (self.current_state.clip.cast()
|
|
* self.scale_factor)
|
|
.scale(1. / source_to_target_x, 1. / source_to_target_y);
|
|
|
|
for t in textures.as_slice() {
|
|
if let Some(clipped_relative_source_rect) =
|
|
t.rect.intersection(&source_rect).and_then(|clipped_source_rect| {
|
|
let relative_clipped_source_rect = clipped_source_rect
|
|
.translate(-source_rect.origin.to_vector())
|
|
.cast();
|
|
euclid::Rect::<_, PhysicalPx>::from_untyped(
|
|
&relative_clipped_source_rect,
|
|
)
|
|
.intersection(&renderer_clip_in_source_rect_space)
|
|
})
|
|
{
|
|
let target_rect = clipped_relative_source_rect
|
|
.scale(source_to_target_x, source_to_target_y)
|
|
.translate(offset)
|
|
.round();
|
|
|
|
let actual_x = clipped_relative_source_rect.origin.x as usize
|
|
+ source_rect.origin.x as usize
|
|
- t.rect.origin.x as usize;
|
|
let actual_y = clipped_relative_source_rect.origin.y as usize
|
|
+ source_rect.origin.y as usize
|
|
- t.rect.origin.y as usize;
|
|
let stride = t.rect.width() as u16 * bpp(t.format);
|
|
self.new_scene_texture(
|
|
target_rect.cast(),
|
|
SceneTexture {
|
|
data: &data.as_slice()[(t.index
|
|
+ (stride as usize) * actual_y
|
|
+ (bpp(t.format) as usize) * actual_x)..],
|
|
stride,
|
|
source_size: clipped_relative_source_rect.size.ceil().cast(),
|
|
format: t.format,
|
|
color: if colorize.alpha() > 0 { colorize } else { t.color },
|
|
},
|
|
);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Copy)]
|
|
struct RenderState {
|
|
alpha: f32,
|
|
offset: LogicalPoint,
|
|
clip: LogicalRect,
|
|
}
|
|
|
|
impl crate::item_rendering::ItemRenderer for PrepareScene {
|
|
fn draw_rectangle(&mut self, rect: Pin<&crate::items::Rectangle>, _: &ItemRc) {
|
|
let geom = LogicalRect::new(LogicalPoint::default(), rect.logical_geometry().size_length());
|
|
if self.should_draw(&geom) {
|
|
let geom = match geom.intersection(&self.current_state.clip) {
|
|
Some(geom) => geom,
|
|
None => return,
|
|
};
|
|
|
|
// FIXME: gradients
|
|
let color = rect.background().color();
|
|
if color.alpha() == 0 {
|
|
return;
|
|
}
|
|
self.new_scene_item(geom, SceneCommand::Rectangle { color: color });
|
|
}
|
|
}
|
|
|
|
fn draw_border_rectangle(&mut self, rect: Pin<&crate::items::BorderRectangle>, _: &ItemRc) {
|
|
let geom = LogicalRect::new(LogicalPoint::default(), rect.logical_geometry().size_length());
|
|
if self.should_draw(&geom) {
|
|
let border = rect.border_width();
|
|
let radius = rect.border_radius();
|
|
// FIXME: gradients
|
|
let color = rect.background().color();
|
|
if radius > 0 as _ {
|
|
let radius = LogicalLength::new(radius)
|
|
.min(geom.width_length() / 2 as Coord)
|
|
.min(geom.height_length() / 2 as Coord);
|
|
if let Some(clipped) = geom.intersection(&self.current_state.clip) {
|
|
let geom2 = geom.cast() * self.scale_factor;
|
|
let clipped2 = clipped.cast() * self.scale_factor;
|
|
let rectangle_index = self.rounded_rectangles.len() as u16;
|
|
// Add a small value to make sure that the clip is always positive despite floating point shenanigans
|
|
const E: f32 = 0.00001;
|
|
self.rounded_rectangles.push(RoundedRectangle {
|
|
radius: (radius.cast() * self.scale_factor).cast(),
|
|
width: (LogicalLength::new(border).cast() * self.scale_factor).cast(),
|
|
border_color: rect.border_color().color(),
|
|
inner_color: color,
|
|
top_clip: PhysicalLength::new((clipped2.min_y() - geom2.min_y() + E) as _),
|
|
bottom_clip: PhysicalLength::new(
|
|
(geom2.max_y() - clipped2.max_y() + E) as _,
|
|
),
|
|
left_clip: PhysicalLength::new((clipped2.min_x() - geom2.min_x() + E) as _),
|
|
right_clip: PhysicalLength::new(
|
|
(geom2.max_x() - clipped2.max_x() + E) as _,
|
|
),
|
|
});
|
|
self.new_scene_item(
|
|
clipped,
|
|
SceneCommand::RoundedRectangle { rectangle_index },
|
|
);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if color.alpha() > 0 {
|
|
if let Some(r) =
|
|
geom.inflate(-border, -border).intersection(&self.current_state.clip)
|
|
{
|
|
self.new_scene_item(r, SceneCommand::Rectangle { color });
|
|
}
|
|
}
|
|
if border > 0.01 as Coord {
|
|
// FIXME: radius
|
|
// FIXME: gradients
|
|
let border_color = rect.border_color().color();
|
|
if border_color.alpha() > 0 {
|
|
let mut add_border = |r: LogicalRect| {
|
|
if let Some(r) = r.intersection(&self.current_state.clip) {
|
|
self.new_scene_item(r, SceneCommand::Rectangle { color: border_color });
|
|
}
|
|
};
|
|
let b = border;
|
|
add_border(euclid::rect(0 as _, 0 as _, geom.width(), b));
|
|
add_border(euclid::rect(0 as _, geom.height() - b, geom.width(), b));
|
|
add_border(euclid::rect(0 as _, b, b, geom.height() - b - b));
|
|
add_border(euclid::rect(geom.width() - b, b, b, geom.height() - b - b));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn draw_image(&mut self, image: Pin<&crate::items::ImageItem>, _: &ItemRc) {
|
|
let geom =
|
|
LogicalRect::new(LogicalPoint::default(), image.logical_geometry().size_length());
|
|
if self.should_draw(&geom) {
|
|
let source = image.source();
|
|
self.draw_image_impl(
|
|
geom,
|
|
&source,
|
|
euclid::Rect::new(Default::default(), source.size().cast()),
|
|
image.image_fit(),
|
|
Default::default(),
|
|
);
|
|
}
|
|
}
|
|
|
|
fn draw_clipped_image(&mut self, image: Pin<&crate::items::ClippedImage>, _: &ItemRc) {
|
|
let geom =
|
|
LogicalRect::new(LogicalPoint::default(), image.logical_geometry().size_length());
|
|
if self.should_draw(&geom) {
|
|
let source = image.source();
|
|
|
|
let source_clip_x = image.source_clip_x();
|
|
let source_clip_y = image.source_clip_y();
|
|
let source_size = source.size();
|
|
let mut source_clip_width = image.source_clip_width();
|
|
// when the source_clip size is empty, make it full
|
|
if source_clip_width == 0 {
|
|
source_clip_width = source_size.width as i32 - source_clip_x;
|
|
}
|
|
let mut source_clip_height = image.source_clip_height();
|
|
if source_clip_height == 0 {
|
|
source_clip_height = source_size.height as i32 - source_clip_y;
|
|
}
|
|
|
|
self.draw_image_impl(
|
|
geom,
|
|
&source,
|
|
euclid::rect(source_clip_x, source_clip_y, source_clip_width, source_clip_height),
|
|
image.image_fit(),
|
|
image.colorize().color(),
|
|
);
|
|
}
|
|
}
|
|
|
|
fn draw_text(&mut self, text: Pin<&crate::items::Text>, _: &ItemRc) {
|
|
let string = text.text();
|
|
if string.trim().is_empty() {
|
|
return;
|
|
}
|
|
let geom = LogicalRect::new(LogicalPoint::default(), text.logical_geometry().size_length());
|
|
if !self.should_draw(&geom) {
|
|
return;
|
|
}
|
|
|
|
let font_request = text.unresolved_font_request().merge(&self.default_font);
|
|
let font = fonts::match_font(&font_request, self.scale_factor);
|
|
let layout = fonts::text_layout_for_font(&font, &font_request, self.scale_factor);
|
|
|
|
let color = text.color().color();
|
|
let max_size = (geom.size.cast() * self.scale_factor).cast();
|
|
|
|
let paragraph = TextParagraphLayout {
|
|
string: &string,
|
|
layout,
|
|
max_width: max_size.width_length(),
|
|
max_height: max_size.height_length(),
|
|
horizontal_alignment: text.horizontal_alignment(),
|
|
vertical_alignment: text.vertical_alignment(),
|
|
wrap: text.wrap(),
|
|
overflow: text.overflow(),
|
|
single_line: false,
|
|
};
|
|
|
|
let clip = self.current_state.clip.cast() * self.scale_factor;
|
|
let offset = self.current_state.offset.to_vector().cast() * self.scale_factor;
|
|
|
|
paragraph.layout_lines(|glyphs, line_x, line_y| {
|
|
let baseline_y = line_y + font.ascent();
|
|
while let Some(positioned_glyph) = glyphs.next() {
|
|
let src_rect = PhysicalRect::new(
|
|
PhysicalPoint::from_lengths(
|
|
line_x + positioned_glyph.x + positioned_glyph.platform_glyph.x(),
|
|
baseline_y
|
|
- positioned_glyph.platform_glyph.y()
|
|
- positioned_glyph.platform_glyph.height(),
|
|
),
|
|
positioned_glyph.platform_glyph.size(),
|
|
)
|
|
.cast();
|
|
|
|
if let Some(clipped_src) = src_rect.intersection(&clip) {
|
|
let geometry = clipped_src.translate(offset).round();
|
|
let origin = (geometry.origin - offset.round()).cast::<usize>();
|
|
let actual_x = origin.x - src_rect.origin.x as usize;
|
|
let actual_y = origin.y - src_rect.origin.y as usize;
|
|
let stride = positioned_glyph.platform_glyph.width().get() as u16;
|
|
let geometry = geometry.cast();
|
|
self.new_scene_texture(
|
|
geometry,
|
|
SceneTexture {
|
|
data: &positioned_glyph.platform_glyph.data().as_slice()
|
|
[actual_x + actual_y * stride as usize..],
|
|
stride,
|
|
source_size: geometry.size,
|
|
format: PixelFormat::AlphaMap,
|
|
color,
|
|
},
|
|
);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
fn draw_text_input(&mut self, text_input: Pin<&crate::items::TextInput>, _: &ItemRc) {
|
|
text_input.logical_geometry();
|
|
// TODO
|
|
}
|
|
|
|
#[cfg(feature = "std")]
|
|
fn draw_path(&mut self, path: Pin<&crate::items::Path>, _: &ItemRc) {
|
|
path.logical_geometry();
|
|
// TODO
|
|
}
|
|
|
|
fn draw_box_shadow(&mut self, box_shadow: Pin<&crate::items::BoxShadow>, _: &ItemRc) {
|
|
box_shadow.logical_geometry();
|
|
// TODO
|
|
}
|
|
|
|
fn combine_clip(&mut self, other: RectF, _radius: Coord, _border_width: Coord) {
|
|
match self.current_state.clip.intersection(&LogicalRect::from_untyped(&other)) {
|
|
Some(r) => {
|
|
self.current_state.clip = r;
|
|
}
|
|
None => {
|
|
self.current_state.clip = LogicalRect::default();
|
|
}
|
|
};
|
|
// TODO: handle radius and border
|
|
}
|
|
|
|
fn get_current_clip(&self) -> crate::graphics::Rect {
|
|
self.current_state.clip.to_untyped()
|
|
}
|
|
|
|
fn translate(&mut self, x: Coord, y: Coord) {
|
|
self.current_state.offset.x += x;
|
|
self.current_state.offset.y += y;
|
|
self.current_state.clip = self.current_state.clip.translate((-x, -y).into())
|
|
}
|
|
|
|
fn rotate(&mut self, _angle_in_degrees: f32) {
|
|
todo!()
|
|
}
|
|
|
|
fn apply_opacity(&mut self, opacity: f32) {
|
|
self.current_state.alpha *= opacity;
|
|
}
|
|
|
|
fn save_state(&mut self) {
|
|
self.state_stack.push(self.current_state);
|
|
}
|
|
|
|
fn restore_state(&mut self) {
|
|
self.current_state = self.state_stack.pop().unwrap();
|
|
}
|
|
|
|
fn scale_factor(&self) -> f32 {
|
|
self.scale_factor.0
|
|
}
|
|
|
|
fn draw_cached_pixmap(
|
|
&mut self,
|
|
_: &ItemRc,
|
|
_update_fn: &dyn Fn(&mut dyn FnMut(u32, u32, &[u8])),
|
|
) {
|
|
todo!()
|
|
}
|
|
|
|
fn draw_string(&mut self, _string: &str, _color: Color) {
|
|
todo!()
|
|
}
|
|
|
|
fn window(&self) -> crate::window::WindowRc {
|
|
unreachable!("this backend don't query the window")
|
|
}
|
|
|
|
fn as_any(&mut self) -> &mut dyn core::any::Any {
|
|
self
|
|
}
|
|
}
|
|
|
|
/// bytes per pixels
|
|
fn bpp(format: PixelFormat) -> u16 {
|
|
match format {
|
|
PixelFormat::Rgb => 3,
|
|
PixelFormat::Rgba => 4,
|
|
PixelFormat::AlphaMap => 1,
|
|
}
|
|
}
|