mirror of
https://github.com/slint-ui/slint.git
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ed3419ac0e
We need to use round_in() instead of cast() as cast() discard too much data if both the x position and the width position are 0.5 then we loose one pixel of width
734 lines
27 KiB
Rust
734 lines
27 KiB
Rust
// Copyright © SixtyFPS GmbH <info@slint-ui.com>
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// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-commercial
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mod draw_functions;
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use crate::{
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profiler, Devices, LogicalItemGeometry, LogicalLength, LogicalPoint, LogicalRect,
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PhysicalLength, PhysicalPoint, PhysicalRect, PhysicalSize, PointLengths, RectLengths,
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ScaleFactor, SizeLengths,
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};
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use alloc::rc::Rc;
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use alloc::{vec, vec::Vec};
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use core::pin::Pin;
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pub use draw_functions::TargetPixel;
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use embedded_graphics::pixelcolor::Rgb888;
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use i_slint_core::graphics::{FontRequest, IntRect, PixelFormat, Rect as RectF};
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use i_slint_core::item_rendering::{ItemRenderer, PartialRenderingCache};
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use i_slint_core::textlayout::TextParagraphLayout;
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use i_slint_core::{Color, ImageInner, StaticTextures};
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type DirtyRegion = PhysicalRect;
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pub fn render_window_frame(
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runtime_window: Rc<i_slint_core::window::Window>,
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background: super::TargetPixel,
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devices: &mut dyn Devices,
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cache: &mut PartialRenderingCache,
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) {
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let size = devices.screen_size();
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let mut scene = prepare_scene(runtime_window, size, devices, cache);
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let mut line_processing_profiler = profiler::Timer::new_stopped();
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let mut span_drawing_profiler = profiler::Timer::new_stopped();
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let mut screen_fill_profiler = profiler::Timer::new_stopped();
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let mut line_buffer = vec![background; size.width as usize];
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let dirty_region = scene.dirty_region;
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debug_assert!(scene.current_line >= dirty_region.origin.y_length());
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while scene.current_line < dirty_region.origin.y_length() + dirty_region.size.height_length() {
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line_buffer[dirty_region.min_x() as usize..dirty_region.max_x() as usize].fill(background);
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span_drawing_profiler.start(devices);
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for span in scene.items[0..scene.current_items_index].iter().rev() {
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debug_assert!(scene.current_line >= span.pos.y_length());
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debug_assert!(scene.current_line < span.pos.y_length() + span.size.height_length(),);
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match span.command {
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SceneCommand::Rectangle { color } => {
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TargetPixel::blend_buffer(
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&mut line_buffer[span.pos.x as usize
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..(span.pos.x_length() + span.size.width_length()).get() as usize],
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color,
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);
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}
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SceneCommand::Texture { texture_index } => {
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let texture = &scene.textures[texture_index as usize];
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draw_functions::draw_texture_line(
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span,
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scene.current_line,
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texture,
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&mut line_buffer,
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);
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}
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SceneCommand::RoundedRectangle { rectangle_index } => {
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let rr = &scene.rounded_rectangles[rectangle_index as usize];
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draw_functions::draw_rounded_rectangle_line(
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span,
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scene.current_line,
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rr,
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&mut line_buffer,
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);
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}
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}
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}
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span_drawing_profiler.stop(devices);
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screen_fill_profiler.start(devices);
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devices.fill_region(
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euclid::rect(
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dirty_region.origin.x,
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scene.current_line.get() as i16,
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dirty_region.size.width,
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1,
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),
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&line_buffer[dirty_region.min_x() as usize..dirty_region.max_x() as usize],
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);
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screen_fill_profiler.stop(devices);
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line_processing_profiler.start(devices);
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if scene.current_line < dirty_region.origin.y_length() + dirty_region.size.height_length() {
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scene.next_line();
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}
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line_processing_profiler.stop(devices);
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}
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line_processing_profiler.stop_profiling(devices, "line processing");
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span_drawing_profiler.stop_profiling(devices, "span drawing");
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screen_fill_profiler.stop_profiling(devices, "screen fill");
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}
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struct Scene {
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/// the next line to be processed
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current_line: PhysicalLength,
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/// The items are sorted like so:
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/// - `items[future_items_index..]` are the items that have `y > current_line`.
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/// They must be sorted by `y` (top to bottom), then by `z` (front to back)
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/// - `items[..current_items_index]` are the items that overlap with the current_line,
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/// sorted by z (front to back)
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items: Vec<SceneItem>,
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future_items_index: usize,
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current_items_index: usize,
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textures: Vec<SceneTexture>,
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rounded_rectangles: Vec<RoundedRectangle>,
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dirty_region: DirtyRegion,
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}
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impl Scene {
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pub fn new(
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mut items: Vec<SceneItem>,
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textures: Vec<SceneTexture>,
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rounded_rectangles: Vec<RoundedRectangle>,
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dirty_region: DirtyRegion,
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) -> Self {
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let current_line = dirty_region.origin.y_length();
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items.retain(|i| i.pos.y_length() + i.size.height_length() > current_line);
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items.sort_unstable_by(|a, b| compare_scene_item(a, b));
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let current_items_index = items.partition_point(|i| i.pos.y_length() <= current_line);
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items[..current_items_index].sort_unstable_by(|a, b| b.z.cmp(&a.z));
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Self {
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items,
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current_line,
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current_items_index,
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future_items_index: current_items_index,
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textures,
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rounded_rectangles,
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dirty_region,
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}
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}
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/// Updates `current_items_index` and `future_items_index` to match the invariant
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pub fn next_line(&mut self) {
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self.current_line += PhysicalLength::new(1);
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// The items array is split in part:
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// 1. [0..i] are the items that have already been processed, that are on this line
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// 2. [j..current_items_index] are the items from the previous line that might still be
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// valid on this line
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// 3. [tmp1, tmp2] is a buffer where we swap items so we can make room for the items in [0..i]
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// 4. [future_items_index..] are the items which might get processed now
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// 5. [current_items_index..tmp1], [tmp2..future_items_index] and [i..j] is garbage
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//
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// At each step, we selecting the item with the higher z from the list 2 or 3 or 4 and take it from
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// that list. Then we add it to the list [0..i] if it needs more processing. If needed,
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// we move the first item from list 2. to list 3. to make some room
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let (mut i, mut j, mut tmp1, mut tmp2) =
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(0, 0, self.current_items_index, self.current_items_index);
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'outer: loop {
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let future_next_z = self
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.items
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.get(self.future_items_index)
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.filter(|i| i.pos.y_length() <= self.current_line)
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.map(|i| i.z);
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let item = loop {
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if tmp1 != tmp2 {
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if future_next_z.map_or(true, |z| self.items[tmp1].z > z) {
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let idx = tmp1;
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tmp1 += 1;
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if tmp1 == tmp2 {
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tmp1 = self.current_items_index;
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tmp2 = self.current_items_index;
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}
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break self.items[idx];
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}
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} else if j < self.current_items_index {
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let item = &self.items[j];
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if item.pos.y_length() + item.size.height_length() <= self.current_line {
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j += 1;
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continue;
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}
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if future_next_z.map_or(true, |z| item.z > z) {
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j += 1;
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break *item;
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}
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}
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if future_next_z.is_some() {
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self.future_items_index += 1;
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break self.items[self.future_items_index - 1];
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}
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break 'outer;
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};
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if i != j {
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// there is room
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} else if j >= self.current_items_index && tmp1 == tmp2 {
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// the current_items list is empty
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j += 1
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} else if self.items[j].pos.y_length() + self.items[j].size.height_length()
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<= self.current_line
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{
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// next item in the current_items array is no longer in this line
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j += 1;
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} else if tmp2 < self.future_items_index && j < self.current_items_index {
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// move the next item in current_items
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let to_move = self.items[j];
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self.items[tmp2] = to_move;
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j += 1;
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tmp2 += 1;
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} else {
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debug_assert!(tmp1 >= self.current_items_index);
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let sort_begin = i;
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// merge sort doesn't work because we don't have enough tmp space, just bring all items and use a normal sort.
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while j < self.current_items_index {
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let item = self.items[j];
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if item.pos.y_length() + item.size.height_length() > self.current_line {
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self.items[i] = item;
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i += 1;
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}
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j += 1;
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}
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self.items.copy_within(tmp1..tmp2, i);
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i += tmp2 - tmp1;
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debug_assert!(i < self.future_items_index);
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self.items[i] = item;
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i += 1;
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while self.future_items_index < self.items.len() {
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let item = self.items[self.future_items_index];
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if item.pos.y_length() > self.current_line {
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break;
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}
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self.items[i] = item;
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i += 1;
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self.future_items_index += 1;
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}
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self.items[sort_begin..i].sort_unstable_by(|a, b| b.z.cmp(&a.z));
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break;
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}
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self.items[i] = item;
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i += 1;
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}
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self.current_items_index = i;
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// check that current items are properly sorted
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debug_assert!(self.items[0..self.current_items_index].windows(2).all(|x| x[0].z >= x[1].z));
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}
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}
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#[derive(Clone, Copy, Debug)]
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struct SceneItem {
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pos: PhysicalPoint,
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size: PhysicalSize,
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// this is the order of the item from which it is in the item tree
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z: u16,
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command: SceneCommand,
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}
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fn compare_scene_item(a: &SceneItem, b: &SceneItem) -> core::cmp::Ordering {
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// First, order by line (top to bottom)
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match a.pos.y.partial_cmp(&b.pos.y) {
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None | Some(core::cmp::Ordering::Equal) => {}
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Some(ord) => return ord,
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}
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// Then by the reverse z (front to back)
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match a.z.partial_cmp(&b.z) {
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None | Some(core::cmp::Ordering::Equal) => {}
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Some(ord) => return ord.reverse(),
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}
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// anything else, we don't care
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core::cmp::Ordering::Equal
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}
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#[derive(Clone, Copy, Debug)]
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#[repr(u8)]
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enum SceneCommand {
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Rectangle {
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color: Color,
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},
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/// texture_index is an index in the Scene::textures array
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Texture {
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texture_index: u16,
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},
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/// rectangle_index is an index in the Scene::rounded_rectangle array
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RoundedRectangle {
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rectangle_index: u16,
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},
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}
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struct SceneTexture {
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data: &'static [u8],
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format: PixelFormat,
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/// bytes between two lines in the source
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stride: u16,
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source_size: PhysicalSize,
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color: Color,
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}
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struct RoundedRectangle {
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radius: PhysicalLength,
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/// the border's width
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width: PhysicalLength,
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border_color: Color,
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inner_color: Color,
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/// The clips is the amount of pixels of the rounded rectangle that is clipped away.
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/// For example, if left_clip > width, then the left border will not be visible, and
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/// if left_clip > radius, then no radius will be seen in the left side
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left_clip: PhysicalLength,
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right_clip: PhysicalLength,
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top_clip: PhysicalLength,
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bottom_clip: PhysicalLength,
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}
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fn prepare_scene(
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runtime_window: Rc<i_slint_core::window::Window>,
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size: PhysicalSize,
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devices: &dyn Devices,
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cache: &mut PartialRenderingCache,
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) -> Scene {
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let prepare_scene_profiler = profiler::Timer::new(devices);
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let mut compute_dirty_region_profiler = profiler::Timer::new_stopped();
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let factor = ScaleFactor::new(runtime_window.scale_factor());
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let prepare_scene = PrepareScene::new(size, factor, runtime_window.default_font_properties());
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let mut renderer = i_slint_core::item_rendering::PartialRenderer::new(cache, prepare_scene);
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runtime_window.draw_contents(|components| {
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compute_dirty_region_profiler.start(devices);
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for (component, origin) in components {
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renderer.compute_dirty_regions(component, *origin);
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}
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renderer.combine_clip(
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((LogicalRect::from_untyped(&renderer.dirty_region.to_rect()) * factor).round_out()
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/ factor)
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.to_untyped(),
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0.,
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0.,
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);
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compute_dirty_region_profiler.stop(devices);
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for (component, origin) in components {
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i_slint_core::item_rendering::render_component_items(component, &mut renderer, *origin);
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}
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});
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let dirty_region = (LogicalRect::from_untyped(&renderer.dirty_region.to_rect()) * factor)
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.round_out()
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.cast()
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.intersection(&PhysicalRect { origin: euclid::point2(0, 0), size })
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.unwrap_or_default();
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prepare_scene_profiler.stop_profiling(devices, "prepare_scene");
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compute_dirty_region_profiler.stop_profiling(devices, "+ dirty_region");
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let prepare_scene = renderer.into_inner();
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Scene::new(
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prepare_scene.items,
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prepare_scene.textures,
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prepare_scene.rounded_rectangles,
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dirty_region,
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)
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}
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struct PrepareScene {
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items: Vec<SceneItem>,
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textures: Vec<SceneTexture>,
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rounded_rectangles: Vec<RoundedRectangle>,
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state_stack: Vec<RenderState>,
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current_state: RenderState,
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scale_factor: ScaleFactor,
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default_font: FontRequest,
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}
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impl PrepareScene {
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fn new(size: PhysicalSize, scale_factor: ScaleFactor, default_font: FontRequest) -> Self {
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Self {
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items: vec![],
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rounded_rectangles: vec![],
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textures: vec![],
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state_stack: vec![],
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current_state: RenderState {
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alpha: 1.,
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offset: LogicalPoint::default(),
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clip: LogicalRect::new(LogicalPoint::default(), size.cast() / scale_factor),
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},
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scale_factor,
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default_font,
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}
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}
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fn should_draw(&self, rect: &LogicalRect) -> bool {
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!rect.size.is_empty()
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&& self.current_state.alpha > 0.01
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&& self.current_state.clip.intersects(rect)
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}
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fn new_scene_rectangle(&mut self, geometry: LogicalRect, color: Color) {
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self.new_scene_item(geometry, SceneCommand::Rectangle { color });
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}
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fn new_scene_texture(&mut self, geometry: LogicalRect, texture: SceneTexture) {
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let texture_index = self.textures.len() as u16;
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self.textures.push(texture);
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self.new_scene_item(geometry, SceneCommand::Texture { texture_index });
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}
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fn new_scene_item(&mut self, geometry: LogicalRect, command: SceneCommand) {
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let geometry = (geometry.translate(self.current_state.offset.to_vector())
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* self.scale_factor)
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.round_in()
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.cast();
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let size = geometry.size;
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if !size.is_empty() {
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let z = self.items.len() as u16;
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let pos = geometry.origin;
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self.items.push(SceneItem { pos, size, z, command });
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}
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}
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fn draw_image_impl(
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&mut self,
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geom: LogicalRect,
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source: &i_slint_core::graphics::Image,
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source_clip: IntRect,
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colorize: Color,
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) {
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let image_inner: &ImageInner = source.into();
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match image_inner {
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ImageInner::None => (),
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ImageInner::AbsoluteFilePath(_) | ImageInner::EmbeddedData { .. } => {
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unimplemented!()
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}
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ImageInner::EmbeddedImage(_) => todo!(),
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ImageInner::StaticTextures(StaticTextures { size, data, textures, .. }) => {
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let sx = geom.width() / (size.width as f32);
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let sy = geom.height() / (size.height as f32);
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for t in textures.as_slice() {
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if let Some(dest_rect) = t.rect.intersection(&source_clip).and_then(|r| {
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r.cast().intersection(
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&self.current_state.clip.to_untyped().scale(1. / sx, 1. / sy),
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)
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}) {
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let actual_x = dest_rect.origin.x as usize - t.rect.origin.x as usize;
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let actual_y = dest_rect.origin.y as usize - t.rect.origin.y as usize;
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let stride = t.rect.width() as u16 * bpp(t.format);
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self.new_scene_texture(
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LogicalRect::from_untyped(&dest_rect.scale(sx, sy)),
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SceneTexture {
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data: &data.as_slice()[(t.index
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+ (stride as usize) * actual_y
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+ (bpp(t.format) as usize) * actual_x)..],
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stride,
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source_size: PhysicalSize::from_untyped(dest_rect.size.cast()),
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format: t.format,
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color: if colorize.alpha() > 0 { colorize } else { t.color },
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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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#[derive(Clone, Copy)]
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struct RenderState {
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alpha: f32,
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offset: LogicalPoint,
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clip: LogicalRect,
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}
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impl i_slint_core::item_rendering::ItemRenderer for PrepareScene {
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fn draw_rectangle(&mut self, rect: Pin<&i_slint_core::items::Rectangle>) {
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let geom = LogicalRect::new(LogicalPoint::default(), rect.logical_geometry().size_length());
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if self.should_draw(&geom) {
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let geom = match geom.intersection(&self.current_state.clip) {
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Some(geom) => geom,
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None => return,
|
|
};
|
|
|
|
// FIXME: gradients
|
|
let color = rect.background().color();
|
|
if color.alpha() == 0 {
|
|
return;
|
|
}
|
|
self.new_scene_rectangle(geom, color);
|
|
}
|
|
}
|
|
|
|
fn draw_border_rectangle(&mut self, rect: Pin<&i_slint_core::items::BorderRectangle>) {
|
|
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. {
|
|
if let Some(clipped) = geom.intersection(&self.current_state.clip) {
|
|
let geom2 = geom * self.scale_factor;
|
|
let clipped2 = clipped * self.scale_factor;
|
|
let rectangle_index = self.rounded_rectangles.len() as u16;
|
|
self.rounded_rectangles.push(RoundedRectangle {
|
|
radius: (LogicalLength::new(radius) * self.scale_factor).cast(),
|
|
width: (LogicalLength::new(border) * self.scale_factor).cast(),
|
|
border_color: rect.border_color().color(),
|
|
inner_color: color,
|
|
top_clip: PhysicalLength::new((clipped2.min_y() - geom2.min_y()) as _),
|
|
bottom_clip: PhysicalLength::new((geom2.max_y() - clipped2.max_y()) as _),
|
|
left_clip: PhysicalLength::new((clipped2.min_x() - geom2.min_x()) as _),
|
|
right_clip: PhysicalLength::new((geom2.max_x() - clipped2.max_x()) 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_rectangle(r, color);
|
|
}
|
|
}
|
|
if border > 0.01 {
|
|
// 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_rectangle(r, border_color);
|
|
}
|
|
};
|
|
add_border(euclid::rect(0., 0., geom.width(), border));
|
|
add_border(euclid::rect(0., geom.height() - border, geom.width(), border));
|
|
add_border(euclid::rect(0., border, border, geom.height() - border - border));
|
|
add_border(euclid::rect(
|
|
geom.width() - border,
|
|
border,
|
|
border,
|
|
geom.height() - border - border,
|
|
));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn draw_image(&mut self, image: Pin<&i_slint_core::items::ImageItem>) {
|
|
let geom =
|
|
LogicalRect::new(LogicalPoint::default(), image.logical_geometry().size_length());
|
|
if self.should_draw(&geom) {
|
|
self.draw_image_impl(
|
|
geom,
|
|
&image.source(),
|
|
euclid::rect(0, 0, i32::MAX, i32::MAX),
|
|
Default::default(),
|
|
);
|
|
}
|
|
}
|
|
|
|
fn draw_clipped_image(&mut self, image: Pin<&i_slint_core::items::ClippedImage>) {
|
|
// when the source_clip size is empty, make it full
|
|
let a = |v| if v == 0 { i32::MAX } else { v };
|
|
|
|
let geom =
|
|
LogicalRect::new(LogicalPoint::default(), image.logical_geometry().size_length());
|
|
if self.should_draw(&geom) {
|
|
self.draw_image_impl(
|
|
geom,
|
|
&image.source(),
|
|
euclid::rect(
|
|
image.source_clip_x(),
|
|
image.source_clip_y(),
|
|
a(image.source_clip_width()),
|
|
a(image.source_clip_height()),
|
|
),
|
|
image.colorize().color(),
|
|
);
|
|
}
|
|
}
|
|
|
|
fn draw_text(&mut self, text: Pin<&i_slint_core::items::Text>) {
|
|
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 = crate::fonts::match_font(&font_request, self.scale_factor);
|
|
|
|
let color = text.color().color();
|
|
let max_size = (geom.size * self.scale_factor).cast();
|
|
|
|
let paragraph = TextParagraphLayout {
|
|
string: &string,
|
|
font: &font,
|
|
font_height: font.height(),
|
|
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,
|
|
};
|
|
|
|
paragraph.layout_lines(|glyphs, line_x, line_y| {
|
|
let baseline_y = line_y + font.ascent();
|
|
while let Some((glyph_baseline_x, glyph)) = glyphs.next() {
|
|
let bitmap_glyph = match glyph {
|
|
Some(g) => g,
|
|
None => continue,
|
|
};
|
|
let src_rect = PhysicalRect::new(
|
|
PhysicalPoint::from_lengths(
|
|
line_x + glyph_baseline_x + bitmap_glyph.x(),
|
|
baseline_y - bitmap_glyph.y() - bitmap_glyph.height(),
|
|
),
|
|
bitmap_glyph.size(),
|
|
)
|
|
.cast();
|
|
|
|
if let Some(clipped_rect) =
|
|
src_rect.intersection(&(self.current_state.clip * self.scale_factor))
|
|
{
|
|
let actual_x = clipped_rect.origin.x as usize - src_rect.origin.x as usize;
|
|
let actual_y = clipped_rect.origin.y as usize - src_rect.origin.y as usize;
|
|
|
|
let stride = bitmap_glyph.width().get() as u16;
|
|
|
|
self.new_scene_texture(
|
|
clipped_rect / self.scale_factor,
|
|
SceneTexture {
|
|
data: &bitmap_glyph.data().as_slice()
|
|
[actual_x + actual_y * stride as usize..],
|
|
stride,
|
|
source_size: clipped_rect.size.cast(),
|
|
format: PixelFormat::AlphaMap,
|
|
color,
|
|
},
|
|
);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
fn draw_text_input(&mut self, _text_input: Pin<&i_slint_core::items::TextInput>) {
|
|
// TODO
|
|
}
|
|
|
|
#[cfg(feature = "std")]
|
|
fn draw_path(&mut self, _path: Pin<&i_slint_core::items::Path>) {
|
|
// TODO
|
|
}
|
|
|
|
fn draw_box_shadow(&mut self, _box_shadow: Pin<&i_slint_core::items::BoxShadow>) {
|
|
// TODO
|
|
}
|
|
|
|
fn combine_clip(&mut self, other: RectF, _radius: f32, _border_width: f32) {
|
|
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) -> i_slint_core::graphics::Rect {
|
|
self.current_state.clip.to_untyped()
|
|
}
|
|
|
|
fn translate(&mut self, x: f32, y: f32) {
|
|
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,
|
|
_item_cache: &i_slint_core::item_rendering::CachedRenderingData,
|
|
_update_fn: &dyn Fn(&mut dyn FnMut(u32, u32, &[u8])),
|
|
) {
|
|
todo!()
|
|
}
|
|
|
|
fn draw_string(&mut self, _string: &str, _color: Color) {
|
|
todo!()
|
|
}
|
|
|
|
fn window(&self) -> i_slint_core::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,
|
|
}
|
|
}
|
|
|
|
pub fn to_rgb888_color_discard_alpha(col: Color) -> Rgb888 {
|
|
Rgb888::new(col.red(), col.green(), col.blue())
|
|
}
|