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Remove iced_glow, glyph-brush, and wgpu_glyph dependencies

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Héctor Ramón Jiménez 2023-01-06 23:29:38 +01:00
parent 573d27eb52
commit b9a9576207
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GPG key ID: 140CC052C94F138E
47 changed files with 30 additions and 3846 deletions
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11
Cargo.toml
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@ -14,19 +14,15 @@ categories = ["gui"]
[features]
default = ["wgpu"]
# Enables the `Image` widget
image = ["iced_wgpu?/image", "iced_glow?/image", "image_rs"]
image = ["iced_wgpu?/image", "image_rs"]
# Enables the `Svg` widget
svg = ["iced_wgpu?/svg", "iced_glow?/svg"]
svg = ["iced_wgpu?/svg"]
# Enables the `Canvas` widget
canvas = ["iced_graphics/canvas"]
# Enables the `QRCode` widget
qr_code = ["iced_graphics/qr_code"]
# Enables the `iced_wgpu` renderer
wgpu = ["iced_wgpu"]
# Enables using system fonts
default_system_font = ["iced_wgpu?/default_system_font", "iced_glow?/default_system_font"]
# Enables the `iced_glow` renderer. Overrides `iced_wgpu`
glow = ["iced_glow", "iced_glutin"]
# Enables a debug view in native platforms (press F12)
debug = ["iced_winit/debug"]
# Enables `tokio` as the `executor::Default` on native platforms
@ -44,7 +40,6 @@ chrome-trace = [
"iced_winit/chrome-trace",
"iced_glutin?/trace",
"iced_wgpu?/tracing",
"iced_glow?/tracing",
]
[badges]
@ -55,7 +50,6 @@ members = [
"core",
"futures",
"graphics",
"glow",
"glutin",
"lazy",
"native",
@ -72,7 +66,6 @@ iced_native = { version = "0.9", path = "native" }
iced_graphics = { version = "0.7", path = "graphics" }
iced_winit = { version = "0.8", path = "winit", features = ["application"] }
iced_glutin = { version = "0.7", path = "glutin", optional = true }
iced_glow = { version = "0.7", path = "glow", optional = true }
thiserror = "1.0"
[dependencies.image_rs]

0
examples/integration_wgpu/.gitignore → examples/integration/.gitignore vendored
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2
examples/integration_wgpu/Cargo.toml → examples/integration/Cargo.toml
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@ -1,5 +1,5 @@
[package]
name = "integration_wgpu"
name = "integration"
version = "0.1.0"
authors = ["Héctor Ramón Jiménez <hector0193@gmail.com>"]
edition = "2021"

0
examples/integration_wgpu/README.md → examples/integration/README.md
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4
examples/integration_wgpu/index.html → examples/integration/index.html
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@ -8,8 +8,8 @@
<h1>integration_wgpu</h1>
<canvas id="iced_canvas"></canvas>
<script type="module">
import init from "./integration_wgpu.js";
init('./integration_wgpu_bg.wasm');
import init from "./integration.js";
init('./integration_bg.wasm');
</script>
<style>
body {

0
examples/integration_wgpu/src/controls.rs → examples/integration/src/controls.rs
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0
examples/integration_wgpu/src/main.rs → examples/integration/src/main.rs
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0
examples/integration_wgpu/src/scene.rs → examples/integration/src/scene.rs
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0
examples/integration_wgpu/src/shader/frag.wgsl → examples/integration/src/shader/frag.wgsl
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0
examples/integration_wgpu/src/shader/vert.wgsl → examples/integration/src/shader/vert.wgsl
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12
examples/integration_opengl/Cargo.toml
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@ -1,12 +0,0 @@
[package]
name = "integration_opengl"
version = "0.1.0"
authors = ["Héctor Ramón Jiménez <hector0193@gmail.com>"]
edition = "2021"
publish = false
[dependencies]
iced_glutin = { path = "../../glutin" }
iced_glow = { path = "../../glow" }
iced_winit = { path = "../../winit" }
env_logger = "0.8"

16
examples/integration_opengl/README.md
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@ -1,16 +0,0 @@
## OpenGL integration
A demonstration of how to integrate Iced in an existing graphical OpenGL application.
The __[`main`]__ file contains all the code of the example.
<div align="center">
<a href="https://imgbox.com/9P9ETcod" target="_blank"><img src="https://images2.imgbox.com/2a/51/9P9ETcod_o.gif" alt="image host"/></a>
</div>
You can run it with `cargo run`:
```
cargo run --package integration_opengl
```
[`main`]: src/main.rs

101
examples/integration_opengl/src/controls.rs
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@ -1,101 +0,0 @@
use iced_glow::Renderer;
use iced_glutin::widget::Slider;
use iced_glutin::widget::{Column, Row, Text};
use iced_glutin::{Alignment, Color, Command, Element, Length, Program};
pub struct Controls {
background_color: Color,
}
#[derive(Debug, Clone)]
pub enum Message {
BackgroundColorChanged(Color),
}
impl Controls {
pub fn new() -> Controls {
Controls {
background_color: Color::BLACK,
}
}
pub fn background_color(&self) -> Color {
self.background_color
}
}
impl Program for Controls {
type Renderer = Renderer;
type Message = Message;
fn update(&mut self, message: Message) -> Command<Message> {
match message {
Message::BackgroundColorChanged(color) => {
self.background_color = color;
}
}
Command::none()
}
fn view(&self) -> Element<Message, Renderer> {
let background_color = self.background_color;
let sliders = Row::new()
.width(500)
.spacing(20)
.push(
Slider::new(0.0..=1.0, background_color.r, move |r| {
Message::BackgroundColorChanged(Color {
r,
..background_color
})
})
.step(0.01),
)
.push(
Slider::new(0.0..=1.0, background_color.g, move |g| {
Message::BackgroundColorChanged(Color {
g,
..background_color
})
})
.step(0.01),
)
.push(
Slider::new(0.0..=1.0, background_color.b, move |b| {
Message::BackgroundColorChanged(Color {
b,
..background_color
})
})
.step(0.01),
);
Row::new()
.width(Length::Fill)
.height(Length::Fill)
.align_items(Alignment::End)
.push(
Column::new()
.width(Length::Fill)
.align_items(Alignment::End)
.push(
Column::new()
.padding(10)
.spacing(10)
.push(
Text::new("Background color")
.style(Color::WHITE),
)
.push(sliders)
.push(
Text::new(format!("{background_color:?}"))
.size(14)
.style(Color::WHITE),
),
),
)
.into()
}
}

187
examples/integration_opengl/src/main.rs
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@ -1,187 +0,0 @@
mod controls;
mod scene;
use controls::Controls;
use scene::Scene;
use glow::*;
use glutin::dpi::PhysicalPosition;
use glutin::event::{Event, ModifiersState, WindowEvent};
use glutin::event_loop::ControlFlow;
use iced_glow::glow;
use iced_glow::{Backend, Renderer, Settings, Viewport};
use iced_glutin::conversion;
use iced_glutin::glutin;
use iced_glutin::renderer;
use iced_glutin::{program, Clipboard, Color, Debug, Size};
pub fn main() {
env_logger::init();
let (gl, event_loop, windowed_context, shader_version) = {
let el = glutin::event_loop::EventLoop::new();
let wb = glutin::window::WindowBuilder::new()
.with_title("OpenGL integration example")
.with_inner_size(glutin::dpi::LogicalSize::new(1024.0, 768.0));
let windowed_context = glutin::ContextBuilder::new()
.with_vsync(true)
.build_windowed(wb, &el)
.unwrap();
unsafe {
let windowed_context = windowed_context.make_current().unwrap();
let gl = glow::Context::from_loader_function(|s| {
windowed_context.get_proc_address(s) as *const _
});
// Enable auto-conversion from/to sRGB
gl.enable(glow::FRAMEBUFFER_SRGB);
// Enable alpha blending
gl.enable(glow::BLEND);
gl.blend_func(glow::SRC_ALPHA, glow::ONE_MINUS_SRC_ALPHA);
// Disable multisampling by default
gl.disable(glow::MULTISAMPLE);
(gl, el, windowed_context, "#version 410")
}
};
let physical_size = windowed_context.window().inner_size();
let mut viewport = Viewport::with_physical_size(
Size::new(physical_size.width, physical_size.height),
windowed_context.window().scale_factor(),
);
let mut cursor_position = PhysicalPosition::new(-1.0, -1.0);
let mut modifiers = ModifiersState::default();
let mut clipboard = Clipboard::connect(windowed_context.window());
let mut renderer = Renderer::new(Backend::new(&gl, Settings::default()));
let mut debug = Debug::new();
let controls = Controls::new();
let mut state = program::State::new(
controls,
viewport.logical_size(),
&mut renderer,
&mut debug,
);
let mut resized = false;
let scene = Scene::new(&gl, shader_version);
event_loop.run(move |event, _, control_flow| {
*control_flow = ControlFlow::Wait;
match event {
Event::WindowEvent { event, .. } => {
match event {
WindowEvent::CursorMoved { position, .. } => {
cursor_position = position;
}
WindowEvent::ModifiersChanged(new_modifiers) => {
modifiers = new_modifiers;
}
WindowEvent::Resized(physical_size) => {
viewport = Viewport::with_physical_size(
Size::new(
physical_size.width,
physical_size.height,
),
windowed_context.window().scale_factor(),
);
resized = true;
}
WindowEvent::CloseRequested => {
scene.cleanup(&gl);
*control_flow = ControlFlow::Exit
}
_ => (),
}
// Map window event to iced event
if let Some(event) = iced_winit::conversion::window_event(
&event,
windowed_context.window().scale_factor(),
modifiers,
) {
state.queue_event(event);
}
}
Event::MainEventsCleared => {
// If there are events pending
if !state.is_queue_empty() {
// We update iced
let _ = state.update(
viewport.logical_size(),
conversion::cursor_position(
cursor_position,
viewport.scale_factor(),
),
&mut renderer,
&iced_glow::Theme::Dark,
&renderer::Style {
text_color: Color::WHITE,
},
&mut clipboard,
&mut debug,
);
// and request a redraw
windowed_context.window().request_redraw();
}
}
Event::RedrawRequested(_) => {
if resized {
let size = windowed_context.window().inner_size();
unsafe {
gl.viewport(
0,
0,
size.width as i32,
size.height as i32,
);
}
resized = false;
}
let program = state.program();
{
// We clear the frame
scene.clear(&gl, program.background_color());
// Draw the scene
scene.draw(&gl);
}
// And then iced on top
renderer.with_primitives(|backend, primitive| {
backend.present(
&gl,
primitive,
&viewport,
&debug.overlay(),
);
});
// Update the mouse cursor
windowed_context.window().set_cursor_icon(
iced_winit::conversion::mouse_interaction(
state.mouse_interaction(),
),
);
windowed_context.swap_buffers().unwrap();
}
_ => (),
}
});
}

102
examples/integration_opengl/src/scene.rs
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@ -1,102 +0,0 @@
use glow::*;
use iced_glow::glow;
use iced_glow::Color;
pub struct Scene {
program: glow::Program,
vertex_array: glow::VertexArray,
}
impl Scene {
pub fn new(gl: &glow::Context, shader_version: &str) -> Self {
unsafe {
let vertex_array = gl
.create_vertex_array()
.expect("Cannot create vertex array");
gl.bind_vertex_array(Some(vertex_array));
let program = gl.create_program().expect("Cannot create program");
let (vertex_shader_source, fragment_shader_source) = (
r#"const vec2 verts[3] = vec2[3](
vec2(0.5f, 1.0f),
vec2(0.0f, 0.0f),
vec2(1.0f, 0.0f)
);
out vec2 vert;
void main() {
vert = verts[gl_VertexID];
gl_Position = vec4(vert - 0.5, 0.0, 1.0);
}"#,
r#"precision highp float;
in vec2 vert;
out vec4 color;
void main() {
color = vec4(vert, 0.5, 1.0);
}"#,
);
let shader_sources = [
(glow::VERTEX_SHADER, vertex_shader_source),
(glow::FRAGMENT_SHADER, fragment_shader_source),
];
let mut shaders = Vec::with_capacity(shader_sources.len());
for (shader_type, shader_source) in shader_sources.iter() {
let shader = gl
.create_shader(*shader_type)
.expect("Cannot create shader");
gl.shader_source(
shader,
&format!("{shader_version}\n{shader_source}"),
);
gl.compile_shader(shader);
if !gl.get_shader_compile_status(shader) {
panic!("{}", gl.get_shader_info_log(shader));
}
gl.attach_shader(program, shader);
shaders.push(shader);
}
gl.link_program(program);
if !gl.get_program_link_status(program) {
panic!("{}", gl.get_program_info_log(program));
}
for shader in shaders {
gl.detach_shader(program, shader);
gl.delete_shader(shader);
}
gl.use_program(Some(program));
Self {
program,
vertex_array,
}
}
}
pub fn clear(&self, gl: &glow::Context, background_color: Color) {
let [r, g, b, a] = background_color.into_linear();
unsafe {
gl.clear_color(r, g, b, a);
gl.clear(glow::COLOR_BUFFER_BIT);
}
}
pub fn draw(&self, gl: &glow::Context) {
unsafe {
gl.bind_vertex_array(Some(self.vertex_array));
gl.use_program(Some(self.program));
gl.draw_arrays(glow::TRIANGLES, 0, 3);
}
}
pub fn cleanup(&self, gl: &glow::Context) {
unsafe {
gl.delete_program(self.program);
gl.delete_vertex_array(self.vertex_array);
}
}
}

51
glow/Cargo.toml
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@ -1,51 +0,0 @@
[package]
name = "iced_glow"
version = "0.7.0"
authors = ["Héctor Ramón Jiménez <hector0193@gmail.com>"]
edition = "2021"
description = "A glow renderer for iced"
license = "MIT AND OFL-1.1"
repository = "https://github.com/iced-rs/iced"
[features]
svg = ["iced_graphics/svg"]
image = ["iced_graphics/image"]
png = ["iced_graphics/png"]
jpeg = ["iced_graphics/jpeg"]
jpeg_rayon = ["iced_graphics/jpeg_rayon"]
gif = ["iced_graphics/gif"]
webp = ["iced_graphics/webp"]
pnm = ["iced_graphics/pnm"]
ico = ["iced_graphics/ico"]
bmp = ["iced_graphics/bmp"]
hdr = ["iced_graphics/hdr"]
dds = ["iced_graphics/dds"]
farbfeld = ["iced_graphics/farbfeld"]
canvas = ["iced_graphics/canvas"]
qr_code = ["iced_graphics/qr_code"]
default_system_font = ["iced_graphics/font-source"]
[dependencies]
glow = "0.11.1"
glow_glyph = "0.5.0"
glyph_brush = "0.7"
euclid = "0.22"
bytemuck = "1.4"
log = "0.4"
[dependencies.iced_native]
version = "0.9"
path = "../native"
[dependencies.iced_graphics]
version = "0.7"
path = "../graphics"
features = ["font-fallback", "font-icons", "opengl"]
[dependencies.tracing]
version = "0.1.6"
optional = true
[package.metadata.docs.rs]
rustdoc-args = ["--cfg", "docsrs"]
all-features = true

51
glow/README.md
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@ -1,51 +0,0 @@
# `iced_glow`
[![Documentation](https://docs.rs/iced_glow/badge.svg)][documentation]
[![Crates.io](https://img.shields.io/crates/v/iced_glow.svg)](https://crates.io/crates/iced_glow)
[![License](https://img.shields.io/crates/l/iced_glow.svg)](https://github.com/iced-rs/iced/blob/master/LICENSE)
[![Discord Server](https://img.shields.io/discord/628993209984614400?label=&labelColor=6A7EC2&logo=discord&logoColor=ffffff&color=7389D8)](https://discord.gg/3xZJ65GAhd)
`iced_glow` is a [`glow`] renderer for [`iced_native`]. This renderer supports OpenGL 3.0+ and OpenGL ES 2.0.
This renderer is mostly used as a fallback for hardware that doesn't support [`wgpu`] (Vulkan, Metal or DX12).
Currently, `iced_glow` supports the following primitives:
- Text, which is rendered using [`glow_glyph`]. No shaping at all.
- Quads or rectangles, with rounded borders and a solid background color.
- Clip areas, useful to implement scrollables or hide overflowing content.
- Meshes of triangles, useful to draw geometry freely.
<p align="center">
<img alt="The native target" src="../docs/graphs/native.png" width="80%">
</p>
[documentation]: https://docs.rs/iced_glow
[`iced_native`]: ../native
[`glow`]: https://github.com/grovesNL/glow
[`wgpu`]: https://github.com/gfx-rs/wgpu
[`glow_glyph`]: https://github.com/hecrj/glow_glyph
## Installation
Add `iced_glow` as a dependency in your `Cargo.toml`:
```toml
iced_glow = "0.7"
```
__Iced moves fast and the `master` branch can contain breaking changes!__ If
you want to learn about a specific release, check out [the release list].
[the release list]: https://github.com/iced-rs/iced/releases
## Current limitations
The current implementation is quite naive, it uses:
- A different pipeline/shader for each primitive
- A very simplistic layer model: every `Clip` primitive will generate new layers
- _Many_ render passes instead of preparing everything upfront
- A glyph cache that is trimmed incorrectly when there are multiple layers (a [`glyph_brush`] limitation)
Some of these issues are already being worked on! If you want to help, [get in touch!]
[get in touch!]: ../CONTRIBUTING.md
[`glyph_brush`]: https://github.com/alexheretic/glyph-brush

280
glow/src/backend.rs
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@ -1,280 +0,0 @@
#[cfg(any(feature = "image", feature = "svg"))]
use crate::image;
use crate::quad;
use crate::text;
use crate::{program, triangle};
use crate::{Settings, Transformation, Viewport};
use iced_graphics::backend;
use iced_graphics::font;
use iced_graphics::{Layer, Primitive};
use iced_native::alignment;
use iced_native::{Font, Size};
/// A [`glow`] graphics backend for [`iced`].
///
/// [`glow`]: https://github.com/grovesNL/glow
/// [`iced`]: https://github.com/iced-rs/iced
#[derive(Debug)]
pub struct Backend {
#[cfg(any(feature = "image", feature = "svg"))]
image_pipeline: image::Pipeline,
quad_pipeline: quad::Pipeline,
text_pipeline: text::Pipeline,
triangle_pipeline: triangle::Pipeline,
default_text_size: f32,
}
impl Backend {
/// Creates a new [`Backend`].
pub fn new(gl: &glow::Context, settings: Settings) -> Self {
let text_pipeline = text::Pipeline::new(
gl,
settings.default_font,
settings.text_multithreading,
);
let shader_version = program::Version::new(gl);
#[cfg(any(feature = "image", feature = "svg"))]
let image_pipeline = image::Pipeline::new(gl, &shader_version);
let quad_pipeline = quad::Pipeline::new(gl, &shader_version);
let triangle_pipeline = triangle::Pipeline::new(gl, &shader_version);
Self {
#[cfg(any(feature = "image", feature = "svg"))]
image_pipeline,
quad_pipeline,
text_pipeline,
triangle_pipeline,
default_text_size: settings.default_text_size,
}
}
/// Draws the provided primitives in the default framebuffer.
///
/// The text provided as overlay will be rendered on top of the primitives.
/// This is useful for rendering debug information.
pub fn present<T: AsRef<str>>(
&mut self,
gl: &glow::Context,
primitives: &[Primitive],
viewport: &Viewport,
overlay_text: &[T],
) {
let viewport_size = viewport.physical_size();
let scale_factor = viewport.scale_factor() as f32;
let projection = viewport.projection();
let mut layers = Layer::generate(primitives, viewport);
layers.push(Layer::overlay(overlay_text, viewport));
for layer in layers {
self.flush(
gl,
scale_factor,
projection,
&layer,
viewport_size.height,
);
}
#[cfg(any(feature = "image", feature = "svg"))]
self.image_pipeline.trim_cache(gl);
}
fn flush(
&mut self,
gl: &glow::Context,
scale_factor: f32,
transformation: Transformation,
layer: &Layer<'_>,
target_height: u32,
) {
let mut bounds = (layer.bounds * scale_factor).snap();
if bounds.width < 1 || bounds.height < 1 {
return;
}
bounds.height = bounds.height.min(target_height);
if !layer.quads.is_empty() {
self.quad_pipeline.draw(
gl,
target_height,
&layer.quads,
transformation,
scale_factor,
bounds,
);
}
if !layer.meshes.is_empty() {
let scaled = transformation
* Transformation::scale(scale_factor, scale_factor);
self.triangle_pipeline.draw(
&layer.meshes,
gl,
target_height,
scaled,
scale_factor,
);
}
#[cfg(any(feature = "image", feature = "svg"))]
if !layer.images.is_empty() {
let scaled = transformation
* Transformation::scale(scale_factor, scale_factor);
self.image_pipeline.draw(
gl,
target_height,
scaled,
scale_factor,
&layer.images,
bounds,
);
}
if !layer.text.is_empty() {
for text in layer.text.iter() {
// Target physical coordinates directly to avoid blurry text
let text = glow_glyph::Section {
// TODO: We `round` here to avoid rerasterizing text when
// its position changes slightly. This can make text feel a
// bit "jumpy". We may be able to do better once we improve
// our text rendering/caching pipeline.
screen_position: (
(text.bounds.x * scale_factor).round(),
(text.bounds.y * scale_factor).round(),
),
// TODO: Fix precision issues with some scale factors.
//
// The `ceil` here can cause some words to render on the
// same line when they should not.
//
// Ideally, `wgpu_glyph` should be able to compute layout
// using logical positions, and then apply the proper
// scaling when rendering. This would ensure that both
// measuring and rendering follow the same layout rules.
bounds: (
(text.bounds.width * scale_factor).ceil(),
(text.bounds.height * scale_factor).ceil(),
),
text: vec![glow_glyph::Text {
text: text.content,
scale: glow_glyph::ab_glyph::PxScale {
x: text.size * scale_factor,
y: text.size * scale_factor,
},
font_id: self.text_pipeline.find_font(text.font),
extra: glow_glyph::Extra {
color: text.color,
z: 0.0,
},
}],
layout: glow_glyph::Layout::default()
.h_align(match text.horizontal_alignment {
alignment::Horizontal::Left => {
glow_glyph::HorizontalAlign::Left
}
alignment::Horizontal::Center => {
glow_glyph::HorizontalAlign::Center
}
alignment::Horizontal::Right => {
glow_glyph::HorizontalAlign::Right
}
})
.v_align(match text.vertical_alignment {
alignment::Vertical::Top => {
glow_glyph::VerticalAlign::Top
}
alignment::Vertical::Center => {
glow_glyph::VerticalAlign::Center
}
alignment::Vertical::Bottom => {
glow_glyph::VerticalAlign::Bottom
}
}),
};
self.text_pipeline.queue(text);
}
self.text_pipeline.draw_queued(
gl,
transformation,
glow_glyph::Region {
x: bounds.x,
y: target_height - (bounds.y + bounds.height),
width: bounds.width,
height: bounds.height,
},
);
}
}
}
impl iced_graphics::Backend for Backend {
fn trim_measurements(&mut self) {
self.text_pipeline.trim_measurement_cache()
}
}
impl backend::Text for Backend {
const ICON_FONT: Font = font::ICONS;
const CHECKMARK_ICON: char = font::CHECKMARK_ICON;
const ARROW_DOWN_ICON: char = font::ARROW_DOWN_ICON;
fn default_size(&self) -> f32 {
self.default_text_size
}
fn measure(
&self,
contents: &str,
size: f32,
font: Font,
bounds: Size,
) -> (f32, f32) {
self.text_pipeline.measure(contents, size, font, bounds)
}
fn hit_test(
&self,
contents: &str,
size: f32,
font: Font,
bounds: Size,
point: iced_native::Point,
nearest_only: bool,
) -> Option<text::Hit> {
self.text_pipeline.hit_test(
contents,
size,
font,
bounds,
point,
nearest_only,
)
}
}
#[cfg(feature = "image")]
impl backend::Image for Backend {
fn dimensions(&self, handle: &iced_native::image::Handle) -> Size<u32> {
self.image_pipeline.dimensions(handle)
}
}
#[cfg(feature = "svg")]
impl backend::Svg for Backend {
fn viewport_dimensions(
&self,
handle: &iced_native::svg::Handle,
) -> Size<u32> {
self.image_pipeline.viewport_dimensions(handle)
}
}

254
glow/src/image.rs
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@ -1,254 +0,0 @@
mod storage;
use storage::Storage;
pub use iced_graphics::triangle::{Mesh2D, Vertex2D};
use crate::program::{self, Shader};
use crate::Transformation;
#[cfg(feature = "image")]
use iced_graphics::image::raster;
#[cfg(feature = "svg")]
use iced_graphics::image::vector;
use iced_graphics::layer;
use iced_graphics::Rectangle;
use iced_graphics::Size;
use glow::HasContext;
use std::cell::RefCell;
#[cfg(feature = "tracing")]
use tracing::info_span;
#[derive(Debug)]
pub(crate) struct Pipeline {
program: <glow::Context as HasContext>::Program,
vertex_array: <glow::Context as HasContext>::VertexArray,
vertex_buffer: <glow::Context as HasContext>::Buffer,
transform_location: <glow::Context as HasContext>::UniformLocation,
storage: Storage,
#[cfg(feature = "image")]
raster_cache: RefCell<raster::Cache<Storage>>,
#[cfg(feature = "svg")]
vector_cache: RefCell<vector::Cache<Storage>>,
}
impl Pipeline {
pub fn new(
gl: &glow::Context,
shader_version: &program::Version,
) -> Pipeline {
let program = unsafe {
let vertex_shader = Shader::vertex(
gl,
shader_version,
include_str!("shader/common/image.vert"),
);
let fragment_shader = Shader::fragment(
gl,
shader_version,
include_str!("shader/common/image.frag"),
);
program::create(
gl,
&[vertex_shader, fragment_shader],
&[(0, "i_Position")],
)
};
let transform_location =
unsafe { gl.get_uniform_location(program, "u_Transform") }
.expect("Get transform location");
unsafe {
gl.use_program(Some(program));
let transform: [f32; 16] = Transformation::identity().into();
gl.uniform_matrix_4_f32_slice(
Some(&transform_location),
false,
&transform,
);
gl.use_program(None);
}
let vertex_buffer =
unsafe { gl.create_buffer().expect("Create vertex buffer") };
let vertex_array =
unsafe { gl.create_vertex_array().expect("Create vertex array") };
unsafe {
gl.bind_vertex_array(Some(vertex_array));
gl.bind_buffer(glow::ARRAY_BUFFER, Some(vertex_buffer));
let vertices = &[0u8, 0, 1, 0, 0, 1, 1, 1];
gl.buffer_data_size(
glow::ARRAY_BUFFER,
vertices.len() as i32,
glow::STATIC_DRAW,
);
gl.buffer_sub_data_u8_slice(
glow::ARRAY_BUFFER,
0,
bytemuck::cast_slice(vertices),
);
gl.enable_vertex_attrib_array(0);
gl.vertex_attrib_pointer_f32(
0,
2,
glow::UNSIGNED_BYTE,
false,
0,
0,
);
gl.bind_buffer(glow::ARRAY_BUFFER, None);
gl.bind_vertex_array(None);
}
Pipeline {
program,
vertex_array,
vertex_buffer,
transform_location,
storage: Storage::default(),
#[cfg(feature = "image")]
raster_cache: RefCell::new(raster::Cache::default()),
#[cfg(feature = "svg")]
vector_cache: RefCell::new(vector::Cache::default()),
}
}
#[cfg(feature = "image")]
pub fn dimensions(&self, handle: &iced_native::image::Handle) -> Size<u32> {
self.raster_cache.borrow_mut().load(handle).dimensions()
}
#[cfg(feature = "svg")]
pub fn viewport_dimensions(
&self,
handle: &iced_native::svg::Handle,
) -> Size<u32> {
let mut cache = self.vector_cache.borrow_mut();
let svg = cache.load(handle);
svg.viewport_dimensions()
}
pub fn draw(
&mut self,
mut gl: &glow::Context,
target_height: u32,
transformation: Transformation,
_scale_factor: f32,
images: &[layer::Image],
layer_bounds: Rectangle<u32>,
) {
#[cfg(feature = "tracing")]
let _ = info_span!("Glow::Image", "DRAW").entered();
unsafe {
gl.use_program(Some(self.program));
gl.bind_vertex_array(Some(self.vertex_array));
gl.bind_buffer(glow::ARRAY_BUFFER, Some(self.vertex_buffer));
gl.enable(glow::SCISSOR_TEST);
}
#[cfg(feature = "image")]
let mut raster_cache = self.raster_cache.borrow_mut();
#[cfg(feature = "svg")]
let mut vector_cache = self.vector_cache.borrow_mut();
for image in images {
let (entry, bounds) = match &image {
#[cfg(feature = "image")]
layer::Image::Raster { handle, bounds } => (
raster_cache.upload(handle, &mut gl, &mut self.storage),
bounds,
),
#[cfg(not(feature = "image"))]
layer::Image::Raster { handle: _, bounds } => (None, bounds),
#[cfg(feature = "svg")]
layer::Image::Vector {
handle,
color,
bounds,
} => {
let size = [bounds.width, bounds.height];
(
vector_cache.upload(
handle,
*color,
size,
_scale_factor,
&mut gl,
&mut self.storage,
),
bounds,
)
}
#[cfg(not(feature = "svg"))]
layer::Image::Vector { bounds, .. } => (None, bounds),
};
unsafe {
gl.scissor(
layer_bounds.x as i32,
(target_height - (layer_bounds.y + layer_bounds.height))
as i32,
layer_bounds.width as i32,
layer_bounds.height as i32,
);
if let Some(storage::Entry { texture, .. }) = entry {
gl.bind_texture(glow::TEXTURE_2D, Some(*texture))
} else {
continue;
}
let translate = Transformation::translate(bounds.x, bounds.y);
let scale = Transformation::scale(bounds.width, bounds.height);
let transformation = transformation * translate * scale;
let matrix: [f32; 16] = transformation.into();
gl.uniform_matrix_4_f32_slice(
Some(&self.transform_location),
false,
&matrix,
);
gl.draw_arrays(glow::TRIANGLE_STRIP, 0, 4);
gl.bind_texture(glow::TEXTURE_2D, None);
}
}
unsafe {
gl.bind_buffer(glow::ARRAY_BUFFER, None);
gl.bind_vertex_array(None);
gl.use_program(None);
gl.disable(glow::SCISSOR_TEST);
}
}
pub fn trim_cache(&mut self, mut gl: &glow::Context) {
#[cfg(feature = "image")]
self.raster_cache
.borrow_mut()
.trim(&mut self.storage, &mut gl);
#[cfg(feature = "svg")]
self.vector_cache
.borrow_mut()
.trim(&mut self.storage, &mut gl);
}
}

78
glow/src/image/storage.rs
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@ -1,78 +0,0 @@
use iced_graphics::image;
use iced_graphics::Size;
use glow::HasContext;
#[derive(Debug, Default)]
pub struct Storage;
impl image::Storage for Storage {
type Entry = Entry;
type State<'a> = &'a glow::Context;
fn upload(
&mut self,
width: u32,
height: u32,
data: &[u8],
gl: &mut &glow::Context,
) -> Option<Self::Entry> {
unsafe {
let texture = gl.create_texture().expect("create texture");
gl.bind_texture(glow::TEXTURE_2D, Some(texture));
gl.tex_image_2d(
glow::TEXTURE_2D,
0,
glow::SRGB8_ALPHA8 as i32,
width as i32,
height as i32,
0,
glow::RGBA,
glow::UNSIGNED_BYTE,
Some(data),
);
gl.tex_parameter_i32(
glow::TEXTURE_2D,
glow::TEXTURE_WRAP_S,
glow::CLAMP_TO_EDGE as _,
);
gl.tex_parameter_i32(
glow::TEXTURE_2D,
glow::TEXTURE_WRAP_T,
glow::CLAMP_TO_EDGE as _,
);
gl.tex_parameter_i32(
glow::TEXTURE_2D,
glow::TEXTURE_MIN_FILTER,
glow::LINEAR as _,
);
gl.tex_parameter_i32(
glow::TEXTURE_2D,
glow::TEXTURE_MAG_FILTER,
glow::LINEAR as _,
);
gl.bind_texture(glow::TEXTURE_2D, None);
Some(Entry {
size: Size::new(width, height),
texture,
})
}
}
fn remove(&mut self, entry: &Entry, gl: &mut &glow::Context) {
unsafe { gl.delete_texture(entry.texture) }
}
}
#[derive(Debug)]
pub struct Entry {
size: Size<u32>,
pub(super) texture: glow::NativeTexture,
}
impl image::storage::Entry for Entry {
fn size(&self) -> Size<u32> {
self.size
}
}

53
glow/src/lib.rs
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@ -1,53 +0,0 @@
//! A [`glow`] renderer for [`iced_native`].
//!
//! ![The native path of the Iced ecosystem](https://github.com/iced-rs/iced/blob/0525d76ff94e828b7b21634fa94a747022001c83/docs/graphs/native.png?raw=true)
//!
//! [`glow`]: https://github.com/grovesNL/glow
//! [`iced_native`]: https://github.com/iced-rs/iced/tree/0.8/native
#![doc(
html_logo_url = "https://raw.githubusercontent.com/iced-rs/iced/9ab6923e943f784985e9ef9ca28b10278297225d/docs/logo.svg"
)]
#![deny(
missing_debug_implementations,
missing_docs,
unused_results,
clippy::extra_unused_lifetimes,
clippy::from_over_into,
clippy::needless_borrow,
clippy::new_without_default,
clippy::useless_conversion
)]
#![forbid(rust_2018_idioms)]
#![allow(clippy::inherent_to_string, clippy::type_complexity)]
#![cfg_attr(docsrs, feature(doc_cfg))]
pub use glow;
mod backend;
#[cfg(any(feature = "image", feature = "svg"))]
mod image;
mod program;
mod quad;
mod text;
mod triangle;
pub mod settings;
pub mod window;
pub use backend::Backend;
pub use settings::Settings;
pub(crate) use iced_graphics::Transformation;
pub use iced_graphics::{Error, Viewport};
pub use iced_native::Theme;
pub use iced_native::alignment;
pub use iced_native::{Alignment, Background, Color, Command, Length, Vector};
/// A [`glow`] graphics renderer for [`iced`].
///
/// [`glow`]: https://github.com/grovesNL/glow
/// [`iced`]: https://github.com/iced-rs/iced
pub type Renderer<Theme = iced_native::Theme> =
iced_graphics::Renderer<Backend, Theme>;

133
glow/src/program.rs
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@ -1,133 +0,0 @@
use glow::HasContext;
/// The [`Version`] of a `Program`.
pub struct Version {
vertex: String,
fragment: String,
}
impl Version {
pub fn new(gl: &glow::Context) -> Version {
let version = gl.version();
let (vertex, fragment) = match (
version.major,
version.minor,
version.is_embedded,
) {
// OpenGL 3.0+
(3, 0 | 1 | 2, false) => (
format!("#version 1{}0\n#extension GL_ARB_explicit_attrib_location : enable", version.minor + 3),
format!(
"#version 1{}0\n#extension GL_ARB_explicit_attrib_location : enable\n#define HIGHER_THAN_300 1",
version.minor + 3
),
),
// OpenGL 3.3+
(3 | 4, _, false) => (
format!("#version {}{}0\n#extension GL_ARB_explicit_attrib_location : enable", version.major, version.minor),
format!(
"#version {}{}0\n#extension GL_ARB_explicit_attrib_location : enable\n#define HIGHER_THAN_300 1",
version.major, version.minor
),
),
// OpenGL ES 3.0+
(3, _, true) => (
format!("#version 3{}0 es", version.minor),
format!(
"#version 3{}0 es\n#define HIGHER_THAN_300 1",
version.minor
),
),
// OpenGL ES 2.0+
(2, _, true) => (
String::from(
"#version 100\n#define in attribute\n#define out varying",
),
String::from("#version 100\n#define in varying"),
),
// OpenGL 2.1
(2, _, false) => (
String::from(
"#version 120\n#define in attribute\n#define out varying",
),
String::from("#version 120\n#define in varying"),
),
// OpenGL 1.1+
_ => panic!("Incompatible context version: {version:?}"),
};
log::info!("Shader directive: {}", vertex.lines().next().unwrap());
Version { vertex, fragment }
}
}
pub struct Shader(<glow::Context as HasContext>::Shader);
impl Shader {
fn compile(gl: &glow::Context, stage: u32, content: &str) -> Shader {
unsafe {
let shader = gl.create_shader(stage).expect("Cannot create shader");
gl.shader_source(shader, content);
gl.compile_shader(shader);
if !gl.get_shader_compile_status(shader) {
panic!("{}", gl.get_shader_info_log(shader));
}
Shader(shader)
}
}
/// Creates a vertex [`Shader`].
pub fn vertex(
gl: &glow::Context,
version: &Version,
content: &'static str,
) -> Self {
let content = format!("{}\n{}", version.vertex, content);
Shader::compile(gl, glow::VERTEX_SHADER, &content)
}
/// Creates a fragment [`Shader`].
pub fn fragment(
gl: &glow::Context,
version: &Version,
content: &'static str,
) -> Self {
let content = format!("{}\n{}", version.fragment, content);
Shader::compile(gl, glow::FRAGMENT_SHADER, &content)
}
}
pub unsafe fn create(
gl: &glow::Context,
shaders: &[Shader],
attributes: &[(u32, &str)],
) -> <glow::Context as HasContext>::Program {
let program = gl.create_program().expect("Cannot create program");
for shader in shaders {
gl.attach_shader(program, shader.0);
}
for (i, name) in attributes {
gl.bind_attrib_location(program, *i, name);
}
gl.link_program(program);
if !gl.get_program_link_status(program) {
panic!("{}", gl.get_program_info_log(program));
}
for shader in shaders {
gl.detach_shader(program, shader.0);
gl.delete_shader(shader.0);
}
program
}

74
glow/src/quad.rs
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@ -1,74 +0,0 @@
mod compatibility;
mod core;
use crate::program;
use crate::Transformation;
use glow::HasContext;
use iced_graphics::layer;
use iced_native::Rectangle;
#[cfg(feature = "tracing")]
use tracing::info_span;
#[derive(Debug)]
pub enum Pipeline {
Core(core::Pipeline),
Compatibility(compatibility::Pipeline),
}
impl Pipeline {
pub fn new(
gl: &glow::Context,
shader_version: &program::Version,
) -> Pipeline {
let gl_version = gl.version();
// OpenGL 3.0+ and OpenGL ES 3.0+ have instancing (which is what separates `core` from `compatibility`)
if gl_version.major >= 3 {
log::info!("Mode: core");
Pipeline::Core(core::Pipeline::new(gl, shader_version))
} else {
log::info!("Mode: compatibility");
Pipeline::Compatibility(compatibility::Pipeline::new(
gl,
shader_version,
))
}
}
pub fn draw(
&mut self,
gl: &glow::Context,
target_height: u32,
instances: &[layer::Quad],
transformation: Transformation,
scale: f32,
bounds: Rectangle<u32>,
) {
#[cfg(feature = "tracing")]
let _ = info_span!("Glow::Quad", "DRAW").enter();
match self {
Pipeline::Core(pipeline) => {
pipeline.draw(
gl,
target_height,
instances,
transformation,
scale,
bounds,
);
}
Pipeline::Compatibility(pipeline) => {
pipeline.draw(
gl,
target_height,
instances,
transformation,
scale,
bounds,
);
}
}
}
}

349
glow/src/quad/compatibility.rs
View file

@ -1,349 +0,0 @@
use crate::program::{self, Shader};
use crate::Transformation;
use glow::HasContext;
use iced_graphics::layer;
use iced_native::Rectangle;
// Only change `MAX_QUADS`, otherwise you could cause problems
// by splitting a triangle into different render passes.
const MAX_QUADS: usize = 100_000;
const MAX_VERTICES: usize = MAX_QUADS * 4;
const MAX_INDICES: usize = MAX_QUADS * 6;
#[derive(Debug)]
pub struct Pipeline {
program: <glow::Context as HasContext>::Program,
vertex_array: <glow::Context as HasContext>::VertexArray,
vertex_buffer: <glow::Context as HasContext>::Buffer,
index_buffer: <glow::Context as HasContext>::Buffer,
transform_location: <glow::Context as HasContext>::UniformLocation,
scale_location: <glow::Context as HasContext>::UniformLocation,
screen_height_location: <glow::Context as HasContext>::UniformLocation,
current_transform: Transformation,
current_scale: f32,
current_target_height: u32,
}
impl Pipeline {
pub fn new(
gl: &glow::Context,
shader_version: &program::Version,
) -> Pipeline {
let program = unsafe {
let vertex_shader = Shader::vertex(
gl,
shader_version,
include_str!("../shader/compatibility/quad.vert"),
);
let fragment_shader = Shader::fragment(
gl,
shader_version,
include_str!("../shader/compatibility/quad.frag"),
);
program::create(
gl,
&[vertex_shader, fragment_shader],
&[
(0, "i_Pos"),
(1, "i_Scale"),
(2, "i_Color"),
(3, "i_BorderColor"),
(4, "i_BorderRadius"),
(5, "i_BorderWidth"),
],
)
};
let transform_location =
unsafe { gl.get_uniform_location(program, "u_Transform") }
.expect("Get transform location");
let scale_location =
unsafe { gl.get_uniform_location(program, "u_Scale") }
.expect("Get scale location");
let screen_height_location =
unsafe { gl.get_uniform_location(program, "u_ScreenHeight") }
.expect("Get target height location");
unsafe {
gl.use_program(Some(program));
gl.uniform_matrix_4_f32_slice(
Some(&transform_location),
false,
Transformation::identity().as_ref(),
);
gl.uniform_1_f32(Some(&scale_location), 1.0);
gl.uniform_1_f32(Some(&screen_height_location), 0.0);
gl.use_program(None);
}
let (vertex_array, vertex_buffer, index_buffer) =
unsafe { create_buffers(gl, MAX_VERTICES) };
Pipeline {
program,
vertex_array,
vertex_buffer,
index_buffer,
transform_location,
scale_location,
screen_height_location,
current_transform: Transformation::identity(),
current_scale: 1.0,
current_target_height: 0,
}
}
pub fn draw(
&mut self,
gl: &glow::Context,
target_height: u32,
instances: &[layer::Quad],
transformation: Transformation,
scale: f32,
bounds: Rectangle<u32>,
) {
// TODO: Remove this allocation (probably by changing the shader and removing the need of two `position`)
let vertices: Vec<Vertex> =
instances.iter().flat_map(Vertex::from_quad).collect();
// TODO: Remove this allocation (or allocate only when needed)
let indices: Vec<i32> = (0..instances.len().min(MAX_QUADS) as i32)
.flat_map(|i| {
[i * 4, 1 + i * 4, 2 + i * 4, 2 + i * 4, 1 + i * 4, 3 + i * 4]
})
.cycle()
.take(instances.len() * 6)
.collect();
unsafe {
gl.enable(glow::SCISSOR_TEST);
gl.scissor(
bounds.x as i32,
(target_height - (bounds.y + bounds.height)) as i32,
bounds.width as i32,
bounds.height as i32,
);
gl.use_program(Some(self.program));
gl.bind_vertex_array(Some(self.vertex_array));
gl.bind_buffer(glow::ARRAY_BUFFER, Some(self.vertex_buffer));
gl.bind_buffer(glow::ELEMENT_ARRAY_BUFFER, Some(self.index_buffer));
}
if transformation != self.current_transform {
unsafe {
gl.uniform_matrix_4_f32_slice(
Some(&self.transform_location),
false,
transformation.as_ref(),
);
self.current_transform = transformation;
}
}
if scale != self.current_scale {
unsafe {
gl.uniform_1_f32(Some(&self.scale_location), scale);
}
self.current_scale = scale;
}
if target_height != self.current_target_height {
unsafe {
gl.uniform_1_f32(
Some(&self.screen_height_location),
target_height as f32,
);
}
self.current_target_height = target_height;
}
let passes = vertices
.chunks(MAX_VERTICES)
.zip(indices.chunks(MAX_INDICES));
for (vertices, indices) in passes {
unsafe {
gl.buffer_sub_data_u8_slice(
glow::ARRAY_BUFFER,
0,
bytemuck::cast_slice(vertices),
);
gl.buffer_sub_data_u8_slice(
glow::ELEMENT_ARRAY_BUFFER,
0,
bytemuck::cast_slice(indices),
);
gl.draw_elements(
glow::TRIANGLES,
indices.len() as i32,
glow::UNSIGNED_INT,
0,
);
}
}
unsafe {
gl.bind_vertex_array(None);
gl.use_program(None);
gl.disable(glow::SCISSOR_TEST);
}
}
}
unsafe fn create_buffers(
gl: &glow::Context,
size: usize,
) -> (
<glow::Context as HasContext>::VertexArray,
<glow::Context as HasContext>::Buffer,
<glow::Context as HasContext>::Buffer,
) {
let vertex_array = gl.create_vertex_array().expect("Create vertex array");
let vertex_buffer = gl.create_buffer().expect("Create vertex buffer");
let index_buffer = gl.create_buffer().expect("Create index buffer");
gl.bind_vertex_array(Some(vertex_array));
gl.bind_buffer(glow::ELEMENT_ARRAY_BUFFER, Some(index_buffer));
gl.buffer_data_size(
glow::ELEMENT_ARRAY_BUFFER,
12 * size as i32,
glow::DYNAMIC_DRAW,
);
gl.bind_buffer(glow::ARRAY_BUFFER, Some(vertex_buffer));
gl.buffer_data_size(
glow::ARRAY_BUFFER,
(size * Vertex::SIZE) as i32,
glow::DYNAMIC_DRAW,
);
let stride = Vertex::SIZE as i32;
gl.enable_vertex_attrib_array(0);
gl.vertex_attrib_pointer_f32(0, 2, glow::FLOAT, false, stride, 0);
gl.enable_vertex_attrib_array(1);
gl.vertex_attrib_pointer_f32(1, 2, glow::FLOAT, false, stride, 4 * 2);
gl.enable_vertex_attrib_array(2);
gl.vertex_attrib_pointer_f32(2, 4, glow::FLOAT, false, stride, 4 * (2 + 2));
gl.enable_vertex_attrib_array(3);
gl.vertex_attrib_pointer_f32(
3,
4,
glow::FLOAT,
false,
stride,
4 * (2 + 2 + 4),
);
gl.enable_vertex_attrib_array(4);
gl.vertex_attrib_pointer_f32(
4,
4,
glow::FLOAT,
false,
stride,
4 * (2 + 2 + 4 + 4),
);
gl.enable_vertex_attrib_array(5);
gl.vertex_attrib_pointer_f32(
5,
1,
glow::FLOAT,
false,
stride,
4 * (2 + 2 + 4 + 4 + 4),
);
gl.enable_vertex_attrib_array(6);
gl.vertex_attrib_pointer_f32(
6,
2,
glow::FLOAT,
false,
stride,
4 * (2 + 2 + 4 + 4 + 4 + 1),
);
gl.bind_vertex_array(None);
gl.bind_buffer(glow::ARRAY_BUFFER, None);
gl.bind_buffer(glow::ELEMENT_ARRAY_BUFFER, None);
(vertex_array, vertex_buffer, index_buffer)
}
/// The vertex of a colored rectangle with a border.
///
/// This type can be directly uploaded to GPU memory.
#[derive(Debug, Clone, Copy, bytemuck::Pod, bytemuck::Zeroable)]
#[repr(C)]
pub struct Vertex {
/// The position of the [`Vertex`].
pub position: [f32; 2],
/// The size of the [`Vertex`].
pub size: [f32; 2],
/// The color of the [`Vertex`], in __linear RGB__.
pub color: [f32; 4],
/// The border color of the [`Vertex`], in __linear RGB__.
pub border_color: [f32; 4],
/// The border radius of the [`Vertex`].
pub border_radius: [f32; 4],
/// The border width of the [`Vertex`].
pub border_width: f32,
/// The __quad__ position of the [`Vertex`].
pub q_position: [f32; 2],
}
impl Vertex {
const SIZE: usize = std::mem::size_of::<Self>();
fn from_quad(quad: &layer::Quad) -> [Vertex; 4] {
let base = Vertex {
position: quad.position,
size: quad.size,
color: quad.color,
border_color: quad.color,
border_radius: quad.border_radius,
border_width: quad.border_width,
q_position: [0.0, 0.0],
};
[
base,
Self {
q_position: [0.0, 1.0],
..base
},
Self {
q_position: [1.0, 0.0],
..base
},
Self {
q_position: [1.0, 1.0],
..base
},
]
}
}

244
glow/src/quad/core.rs
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@ -1,244 +0,0 @@
use crate::program::{self, Shader};
use crate::Transformation;
use glow::HasContext;
use iced_graphics::layer;
use iced_native::Rectangle;
const MAX_INSTANCES: usize = 100_000;
#[derive(Debug)]
pub struct Pipeline {
program: <glow::Context as HasContext>::Program,
vertex_array: <glow::Context as HasContext>::VertexArray,
instances: <glow::Context as HasContext>::Buffer,
transform_location: <glow::Context as HasContext>::UniformLocation,
scale_location: <glow::Context as HasContext>::UniformLocation,
screen_height_location: <glow::Context as HasContext>::UniformLocation,
current_transform: Transformation,
current_scale: f32,
current_target_height: u32,
}
impl Pipeline {
pub fn new(
gl: &glow::Context,
shader_version: &program::Version,
) -> Pipeline {
let program = unsafe {
let vertex_shader = Shader::vertex(
gl,
shader_version,
include_str!("../shader/core/quad.vert"),
);
let fragment_shader = Shader::fragment(
gl,
shader_version,
include_str!("../shader/core/quad.frag"),
);
program::create(
gl,
&[vertex_shader, fragment_shader],
&[
(0, "i_Pos"),
(1, "i_Scale"),
(2, "i_Color"),
(3, "i_BorderColor"),
(4, "i_BorderRadius"),
(5, "i_BorderWidth"),
],
)
};
let transform_location =
unsafe { gl.get_uniform_location(program, "u_Transform") }
.expect("Get transform location");
let scale_location =
unsafe { gl.get_uniform_location(program, "u_Scale") }
.expect("Get scale location");
let screen_height_location =
unsafe { gl.get_uniform_location(program, "u_ScreenHeight") }
.expect("Get target height location");
unsafe {
gl.use_program(Some(program));
gl.uniform_matrix_4_f32_slice(
Some(&transform_location),
false,
Transformation::identity().as_ref(),
);
gl.uniform_1_f32(Some(&scale_location), 1.0);
gl.uniform_1_f32(Some(&screen_height_location), 0.0);
gl.use_program(None);
}
let (vertex_array, instances) =
unsafe { create_instance_buffer(gl, MAX_INSTANCES) };
Pipeline {
program,
vertex_array,
instances,
transform_location,
scale_location,
screen_height_location,
current_transform: Transformation::identity(),
current_scale: 1.0,
current_target_height: 0,
}
}
pub fn draw(
&mut self,
gl: &glow::Context,
target_height: u32,
instances: &[layer::Quad],
transformation: Transformation,
scale: f32,
bounds: Rectangle<u32>,
) {
unsafe {
gl.enable(glow::SCISSOR_TEST);
gl.scissor(
bounds.x as i32,
(target_height - (bounds.y + bounds.height)) as i32,
bounds.width as i32,
bounds.height as i32,
);
gl.use_program(Some(self.program));
gl.bind_vertex_array(Some(self.vertex_array));
gl.bind_buffer(glow::ARRAY_BUFFER, Some(self.instances));
}
if transformation != self.current_transform {
unsafe {
gl.uniform_matrix_4_f32_slice(
Some(&self.transform_location),
false,
transformation.as_ref(),
);
self.current_transform = transformation;
}
}
if scale != self.current_scale {
unsafe {
gl.uniform_1_f32(Some(&self.scale_location), scale);
}
self.current_scale = scale;
}
if target_height != self.current_target_height {
unsafe {
gl.uniform_1_f32(
Some(&self.screen_height_location),
target_height as f32,
);
}
self.current_target_height = target_height;
}
for instances in instances.chunks(MAX_INSTANCES) {
unsafe {
gl.buffer_sub_data_u8_slice(
glow::ARRAY_BUFFER,
0,
bytemuck::cast_slice(instances),
);
gl.draw_arrays_instanced(
glow::TRIANGLE_STRIP,
0,
4,
instances.len() as i32,
);
}
}
unsafe {
gl.bind_vertex_array(None);
gl.use_program(None);
gl.disable(glow::SCISSOR_TEST);
}
}
}
unsafe fn create_instance_buffer(
gl: &glow::Context,
size: usize,
) -> (
<glow::Context as HasContext>::VertexArray,
<glow::Context as HasContext>::Buffer,
) {
let vertex_array = gl.create_vertex_array().expect("Create vertex array");
let buffer = gl.create_buffer().expect("Create instance buffer");
gl.bind_vertex_array(Some(vertex_array));
gl.bind_buffer(glow::ARRAY_BUFFER, Some(buffer));
gl.buffer_data_size(
glow::ARRAY_BUFFER,
(size * std::mem::size_of::<layer::Quad>()) as i32,
glow::DYNAMIC_DRAW,
);
let stride = std::mem::size_of::<layer::Quad>() as i32;
gl.enable_vertex_attrib_array(0);
gl.vertex_attrib_pointer_f32(0, 2, glow::FLOAT, false, stride, 0);
gl.vertex_attrib_divisor(0, 1);
gl.enable_vertex_attrib_array(1);
gl.vertex_attrib_pointer_f32(1, 2, glow::FLOAT, false, stride, 4 * 2);
gl.vertex_attrib_divisor(1, 1);
gl.enable_vertex_attrib_array(2);
gl.vertex_attrib_pointer_f32(2, 4, glow::FLOAT, false, stride, 4 * (2 + 2));
gl.vertex_attrib_divisor(2, 1);
gl.enable_vertex_attrib_array(3);
gl.vertex_attrib_pointer_f32(
3,
4,
glow::FLOAT,
false,
stride,
4 * (2 + 2 + 4),
);
gl.vertex_attrib_divisor(3, 1);
gl.enable_vertex_attrib_array(4);
gl.vertex_attrib_pointer_f32(
4,
4,
glow::FLOAT,
false,
stride,
4 * (2 + 2 + 4 + 4),
);
gl.vertex_attrib_divisor(4, 1);
gl.enable_vertex_attrib_array(5);
gl.vertex_attrib_pointer_f32(
5,
1,
glow::FLOAT,
false,
stride,
4 * (2 + 2 + 4 + 4 + 4),
);
gl.vertex_attrib_divisor(5, 1);
gl.bind_vertex_array(None);
gl.bind_buffer(glow::ARRAY_BUFFER, None);
(vertex_array, buffer)
}

61
glow/src/settings.rs
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@ -1,61 +0,0 @@
//! Configure a renderer.
pub use iced_graphics::Antialiasing;
/// The settings of a [`Backend`].
///
/// [`Backend`]: crate::Backend
#[derive(Clone, Copy, PartialEq)]
pub struct Settings {
/// The bytes of the font that will be used by default.
///
/// If `None` is provided, a default system font will be chosen.
pub default_font: Option<&'static [u8]>,
/// The default size of text.
///
/// By default, it will be set to `20.0`.
pub default_text_size: f32,
/// If enabled, spread text workload in multiple threads when multiple cores
/// are available.
///
/// By default, it is disabled.
pub text_multithreading: bool,
/// The antialiasing strategy that will be used for triangle primitives.
///
/// By default, it is `None`.
pub antialiasing: Option<Antialiasing>,
}
impl Default for Settings {
fn default() -> Settings {
Settings {
default_font: None,
default_text_size: 20.0,
text_multithreading: false,
antialiasing: None,
}
}
}
impl std::fmt::Debug for Settings {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Settings")
// Instead of printing the font bytes, we simply show a `bool` indicating if using a default font or not.
.field("default_font", &self.default_font.is_some())
.field("default_text_size", &self.default_text_size)
.field("text_multithreading", &self.text_multithreading)
.field("antialiasing", &self.antialiasing)
.finish()
}
}
impl Settings {
/// Creates new [`Settings`] using environment configuration.
///
/// Currently, this is equivalent to calling [`Settings::default`].
pub fn from_env() -> Self {
Self::default()
}
}

59
glow/src/shader/common/gradient.frag
View file

@ -1,59 +0,0 @@
#ifdef GL_ES
#ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
#else
precision mediump float;
#endif
#endif
#ifdef HIGHER_THAN_300
layout (location = 0) out vec4 fragColor;
#define gl_FragColor fragColor
#endif
in vec2 raw_position;
uniform vec4 gradient_direction;
uniform int color_stops_size;
// GLSL does not support dynamically sized arrays without SSBOs so this is capped to 16 stops
//stored as color(vec4) -> offset(vec4) sequentially;
uniform vec4 color_stops[32];
//TODO: rewrite without branching to make ALUs happy
void main() {
vec2 start = gradient_direction.xy;
vec2 end = gradient_direction.zw;
vec2 gradient_vec = vec2(end - start);
vec2 current_vec = vec2(raw_position.xy - start);
vec2 unit = normalize(gradient_vec);
float coord_offset = dot(unit, current_vec) / length(gradient_vec);
//if a gradient has a start/end stop that is identical, the mesh will have a transparent fill
gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0);
float min_offset = color_stops[1].x;
float max_offset = color_stops[color_stops_size - 1].x;
for (int i = 0; i < color_stops_size - 2; i += 2) {
float curr_offset = color_stops[i+1].x;
float next_offset = color_stops[i+3].x;
if (coord_offset <= min_offset) {
//current coordinate is before the first defined offset, set it to the start color
gl_FragColor = color_stops[0];
}
if (curr_offset <= coord_offset && coord_offset <= next_offset) {
//current fragment is between the current offset processing & the next one, interpolate colors
gl_FragColor = mix(color_stops[i], color_stops[i+2], smoothstep(
curr_offset,
next_offset,
coord_offset
));
}
if (coord_offset >= max_offset) {
//current coordinate is before the last defined offset, set it to the last color
gl_FragColor = color_stops[color_stops_size - 2];
}
}
}

9
glow/src/shader/common/gradient.vert
View file

@ -1,9 +0,0 @@
uniform mat4 u_Transform;
in vec2 i_Position;
out vec2 raw_position;
void main() {
gl_Position = u_Transform * vec4(i_Position, 0.0, 1.0);
raw_position = i_Position;
}

22
glow/src/shader/common/image.frag
View file

@ -1,22 +0,0 @@
#ifdef GL_ES
#ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
#else
precision mediump float;
#endif
#endif
uniform sampler2D tex;
in vec2 tex_pos;
#ifdef HIGHER_THAN_300
out vec4 fragColor;
#define gl_FragColor fragColor
#endif
#ifdef GL_ES
#define texture texture2D
#endif
void main() {
gl_FragColor = texture(tex, tex_pos);
}

9
glow/src/shader/common/image.vert
View file

@ -1,9 +0,0 @@
uniform mat4 u_Transform;
in vec2 i_Position;
out vec2 tex_pos;
void main() {
gl_Position = u_Transform * vec4(i_Position, 0.0, 1.0);
tex_pos = i_Position;
}

18
glow/src/shader/common/solid.frag
View file

@ -1,18 +0,0 @@
#ifdef GL_ES
#ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
#else
precision mediump float;
#endif
#endif
#ifdef HIGHER_THAN_300
out vec4 fragColor;
#define gl_FragColor fragColor
#endif
in vec4 v_Color;
void main() {
gl_FragColor = v_Color;
}

11
glow/src/shader/common/solid.vert
View file

@ -1,11 +0,0 @@
uniform mat4 u_Transform;
in vec2 i_Position;
in vec4 i_Color;
out vec4 v_Color;
void main() {
gl_Position = u_Transform * vec4(i_Position, 0.0, 1.0);
v_Color = i_Color;
}

83
glow/src/shader/compatibility/quad.frag
View file

@ -1,83 +0,0 @@
#ifdef GL_ES
#ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
#else
precision mediump float;
#endif
#endif
uniform float u_ScreenHeight;
varying vec4 v_Color;
varying vec4 v_BorderColor;
varying vec2 v_Pos;
varying vec2 v_Scale;
varying vec4 v_BorderRadius;
varying float v_BorderWidth;
float _distance(vec2 frag_coord, vec2 position, vec2 size, float radius)
{
// TODO: Try SDF approach: https://www.shadertoy.com/view/wd3XRN
vec2 inner_size = size - vec2(radius, radius) * 2.0;
vec2 top_left = position + vec2(radius, radius);
vec2 bottom_right = top_left + inner_size;
vec2 top_left_distance = top_left - frag_coord;
vec2 bottom_right_distance = frag_coord - bottom_right;
vec2 distance = vec2(
max(max(top_left_distance.x, bottom_right_distance.x), 0.0),
max(max(top_left_distance.y, bottom_right_distance.y), 0.0)
);
return sqrt(distance.x * distance.x + distance.y * distance.y);
}
float selectBorderRadius(vec4 radi, vec2 position, vec2 center)
{
float rx = radi.x;
float ry = radi.y;
rx = position.x > center.x ? radi.y : radi.x;
ry = position.x > center.x ? radi.z : radi.w;
rx = position.y > center.y ? ry : rx;
return rx;
}
void main() {
vec2 fragCoord = vec2(gl_FragCoord.x, u_ScreenHeight - gl_FragCoord.y);
float border_radius = selectBorderRadius(
v_BorderRadius,
fragCoord,
(v_Pos + v_Scale * 0.5).xy
);
float internal_border = max(border_radius - v_BorderWidth, 0.0);
float internal_distance = _distance(
fragCoord,
v_Pos + vec2(v_BorderWidth),
v_Scale - vec2(v_BorderWidth * 2.0),
internal_border
);
float border_mix = smoothstep(
max(internal_border - 0.5, 0.0),
internal_border + 0.5,
internal_distance
);
vec4 mixed_color = mix(v_Color, v_BorderColor, border_mix);
float d = _distance(
fragCoord,
v_Pos,
v_Scale,
border_radius
);
float radius_alpha =
1.0 - smoothstep(max(border_radius - 0.5, 0.0), border_radius + 0.5, d);
gl_FragColor = vec4(mixed_color.xyz, mixed_color.w * radius_alpha);
}

46
glow/src/shader/compatibility/quad.vert
View file

@ -1,46 +0,0 @@
uniform mat4 u_Transform;
uniform float u_Scale;
attribute vec2 i_Pos;
attribute vec2 i_Scale;
attribute vec4 i_Color;
attribute vec4 i_BorderColor;
attribute vec4 i_BorderRadius;
attribute float i_BorderWidth;
attribute vec2 q_Pos;
varying vec4 v_Color;
varying vec4 v_BorderColor;
varying vec2 v_Pos;
varying vec2 v_Scale;
varying vec4 v_BorderRadius;
varying float v_BorderWidth;
void main() {
vec2 p_Pos = i_Pos * u_Scale;
vec2 p_Scale = i_Scale * u_Scale;
vec4 i_BorderRadius = vec4(
min(i_BorderRadius.x, min(i_Scale.x, i_Scale.y) / 2.0),
min(i_BorderRadius.y, min(i_Scale.x, i_Scale.y) / 2.0),
min(i_BorderRadius.z, min(i_Scale.x, i_Scale.y) / 2.0),
min(i_BorderRadius.w, min(i_Scale.x, i_Scale.y) / 2.0)
);
mat4 i_Transform = mat4(
vec4(p_Scale.x + 1.0, 0.0, 0.0, 0.0),
vec4(0.0, p_Scale.y + 1.0, 0.0, 0.0),
vec4(0.0, 0.0, 1.0, 0.0),
vec4(p_Pos - vec2(0.5, 0.5), 0.0, 1.0)
);
v_Color = i_Color;
v_BorderColor = i_BorderColor;
v_Pos = p_Pos;
v_Scale = p_Scale;
v_BorderRadius = i_BorderRadius * u_Scale;
v_BorderWidth = i_BorderWidth * u_Scale;
gl_Position = u_Transform * i_Transform * vec4(q_Pos, 0.0, 1.0);
}

95
glow/src/shader/core/quad.frag
View file

@ -1,95 +0,0 @@
#ifdef GL_ES
#ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
#else
precision mediump float;
#endif
#endif
#ifdef HIGHER_THAN_300
out vec4 fragColor;
#define gl_FragColor fragColor
#endif
uniform float u_ScreenHeight;
in vec4 v_Color;
in vec4 v_BorderColor;
in vec2 v_Pos;
in vec2 v_Scale;
in vec4 v_BorderRadius;
in float v_BorderWidth;
float fDistance(vec2 frag_coord, vec2 position, vec2 size, float radius)
{
// TODO: Try SDF approach: https://www.shadertoy.com/view/wd3XRN
vec2 inner_size = size - vec2(radius, radius) * 2.0;
vec2 top_left = position + vec2(radius, radius);
vec2 bottom_right = top_left + inner_size;
vec2 top_left_distance = top_left - frag_coord;
vec2 bottom_right_distance = frag_coord - bottom_right;
vec2 distance = vec2(
max(max(top_left_distance.x, bottom_right_distance.x), 0.0),
max(max(top_left_distance.y, bottom_right_distance.y), 0.0)
);
return sqrt(distance.x * distance.x + distance.y * distance.y);
}
float selectBorderRadius(vec4 radi, vec2 position, vec2 center)
{
float rx = radi.x;
float ry = radi.y;
rx = position.x > center.x ? radi.y : radi.x;
ry = position.x > center.x ? radi.z : radi.w;
rx = position.y > center.y ? ry : rx;
return rx;
}
void main() {
vec4 mixed_color;
vec2 fragCoord = vec2(gl_FragCoord.x, u_ScreenHeight - gl_FragCoord.y);
float border_radius = selectBorderRadius(
v_BorderRadius,
fragCoord,
(v_Pos + v_Scale * 0.5).xy
);
// TODO: Remove branching (?)
if(v_BorderWidth > 0.0) {
float internal_border = max(border_radius - v_BorderWidth, 0.0);
float internal_distance = fDistance(
fragCoord,
v_Pos + vec2(v_BorderWidth),
v_Scale - vec2(v_BorderWidth * 2.0),
internal_border
);
float border_mix = smoothstep(
max(internal_border - 0.5, 0.0),
internal_border + 0.5,
internal_distance
);
mixed_color = mix(v_Color, v_BorderColor, border_mix);
} else {
mixed_color = v_Color;
}
float d = fDistance(
fragCoord,
v_Pos,
v_Scale,
border_radius
);
float radius_alpha =
1.0 - smoothstep(max(border_radius - 0.5, 0.0), border_radius + 0.5, d);
gl_FragColor = vec4(mixed_color.xyz, mixed_color.w * radius_alpha);
}

52
glow/src/shader/core/quad.vert
View file

@ -1,52 +0,0 @@
uniform mat4 u_Transform;
uniform float u_Scale;
in vec2 i_Pos;
in vec2 i_Scale;
in vec4 i_Color;
in vec4 i_BorderColor;
in vec4 i_BorderRadius;
in float i_BorderWidth;
out vec4 v_Color;
out vec4 v_BorderColor;
out vec2 v_Pos;
out vec2 v_Scale;
out vec4 v_BorderRadius;
out float v_BorderWidth;
vec2 positions[4] = vec2[](
vec2(0.0, 0.0),
vec2(0.0, 1.0),
vec2(1.0, 0.0),
vec2(1.0, 1.0)
);
void main() {
vec2 q_Pos = positions[gl_VertexID];
vec2 p_Pos = i_Pos * u_Scale;
vec2 p_Scale = i_Scale * u_Scale;
vec4 i_BorderRadius = vec4(
min(i_BorderRadius.x, min(i_Scale.x, i_Scale.y) / 2.0),
min(i_BorderRadius.y, min(i_Scale.x, i_Scale.y) / 2.0),
min(i_BorderRadius.z, min(i_Scale.x, i_Scale.y) / 2.0),
min(i_BorderRadius.w, min(i_Scale.x, i_Scale.y) / 2.0)
);
mat4 i_Transform = mat4(
vec4(p_Scale.x + 1.0, 0.0, 0.0, 0.0),
vec4(0.0, p_Scale.y + 1.0, 0.0, 0.0),
vec4(0.0, 0.0, 1.0, 0.0),
vec4(p_Pos - vec2(0.5, 0.5), 0.0, 1.0)
);
v_Color = i_Color;
v_BorderColor = i_BorderColor;
v_Pos = p_Pos;
v_Scale = p_Scale;
v_BorderRadius = i_BorderRadius * u_Scale;
v_BorderWidth = i_BorderWidth * u_Scale;
gl_Position = u_Transform * i_Transform * vec4(q_Pos, 0.0, 1.0);
}

257
glow/src/text.rs
View file

@ -1,257 +0,0 @@
use crate::Transformation;
use iced_graphics::font;
use glow_glyph::ab_glyph;
use std::{cell::RefCell, collections::HashMap};
pub use iced_native::text::Hit;
#[derive(Debug)]
pub struct Pipeline {
draw_brush: RefCell<glow_glyph::GlyphBrush>,
draw_font_map: RefCell<HashMap<String, glow_glyph::FontId>>,
measure_brush: RefCell<glyph_brush::GlyphBrush<()>>,
}
impl Pipeline {
pub fn new(
gl: &glow::Context,
default_font: Option<&[u8]>,
multithreading: bool,
) -> Self {
let default_font = default_font.map(|slice| slice.to_vec());
// TODO: Font customization
#[cfg(feature = "default_system_font")]
let default_font = {
default_font.or_else(|| {
font::Source::new()
.load(&[font::Family::SansSerif, font::Family::Serif])
.ok()
})
};
let default_font =
default_font.unwrap_or_else(|| font::FALLBACK.to_vec());
let font = ab_glyph::FontArc::try_from_vec(default_font)
.unwrap_or_else(|_| {
log::warn!(
"System font failed to load. Falling back to \
embedded font..."
);
ab_glyph::FontArc::try_from_slice(font::FALLBACK)
.expect("Load fallback font")
});
let draw_brush_builder =
glow_glyph::GlyphBrushBuilder::using_font(font.clone())
.initial_cache_size((2048, 2048))
.draw_cache_multithread(multithreading);
#[cfg(target_arch = "wasm32")]
let draw_brush_builder = draw_brush_builder.draw_cache_align_4x4(true);
let draw_brush = draw_brush_builder.build(gl);
let measure_brush =
glyph_brush::GlyphBrushBuilder::using_font(font).build();
Pipeline {
draw_brush: RefCell::new(draw_brush),
draw_font_map: RefCell::new(HashMap::new()),
measure_brush: RefCell::new(measure_brush),
}
}
pub fn queue(&mut self, section: glow_glyph::Section<'_>) {
self.draw_brush.borrow_mut().queue(section);
}
pub fn draw_queued(
&mut self,
gl: &glow::Context,
transformation: Transformation,
region: glow_glyph::Region,
) {
self.draw_brush
.borrow_mut()
.draw_queued_with_transform_and_scissoring(
gl,
transformation.into(),
region,
)
.expect("Draw text");
}
pub fn measure(
&self,
content: &str,
size: f32,
font: iced_native::Font,
bounds: iced_native::Size,
) -> (f32, f32) {
use glow_glyph::GlyphCruncher;
let glow_glyph::FontId(font_id) = self.find_font(font);
let section = glow_glyph::Section {
bounds: (bounds.width, bounds.height),
text: vec![glow_glyph::Text {
text: content,
scale: size.into(),
font_id: glow_glyph::FontId(font_id),
extra: glow_glyph::Extra::default(),
}],
..Default::default()
};
if let Some(bounds) =
self.measure_brush.borrow_mut().glyph_bounds(section)
{
(bounds.width().ceil(), bounds.height().ceil())
} else {
(0.0, 0.0)
}
}
pub fn hit_test(
&self,
content: &str,
size: f32,
font: iced_native::Font,
bounds: iced_native::Size,
point: iced_native::Point,
nearest_only: bool,
) -> Option<Hit> {
use glow_glyph::GlyphCruncher;
let glow_glyph::FontId(font_id) = self.find_font(font);
let section = glow_glyph::Section {
bounds: (bounds.width, bounds.height),
text: vec![glow_glyph::Text {
text: content,
scale: size.into(),
font_id: glow_glyph::FontId(font_id),
extra: glow_glyph::Extra::default(),
}],
..Default::default()
};
let mut mb = self.measure_brush.borrow_mut();
// The underlying type is FontArc, so clones are cheap.
use ab_glyph::{Font, ScaleFont};
let font = mb.fonts()[font_id].clone().into_scaled(size);
// Implements an iterator over the glyph bounding boxes.
let bounds = mb.glyphs(section).map(
|glow_glyph::SectionGlyph {
byte_index, glyph, ..
}| {
(
*byte_index,
iced_native::Rectangle::new(
iced_native::Point::new(
glyph.position.x - font.h_side_bearing(glyph.id),
glyph.position.y - font.ascent(),
),
iced_native::Size::new(
font.h_advance(glyph.id),
font.ascent() - font.descent(),
),
),
)
},
);
// Implements computation of the character index based on the byte index
// within the input string.
let char_index = |byte_index| {
let mut b_count = 0;
for (i, utf8_len) in
content.chars().map(|c| c.len_utf8()).enumerate()
{
if byte_index < (b_count + utf8_len) {
return i;
}
b_count += utf8_len;
}
byte_index
};
if !nearest_only {
for (idx, bounds) in bounds.clone() {
if bounds.contains(point) {
return Some(Hit::CharOffset(char_index(idx)));
}
}
}
let nearest = bounds
.map(|(index, bounds)| (index, bounds.center()))
.min_by(|(_, center_a), (_, center_b)| {
center_a
.distance(point)
.partial_cmp(&center_b.distance(point))
.unwrap_or(std::cmp::Ordering::Greater)
});
nearest.map(|(idx, center)| {
Hit::NearestCharOffset(char_index(idx), point - center)
})
}
pub fn trim_measurement_cache(&mut self) {
// TODO: We should probably use a `GlyphCalculator` for this. However,
// it uses a lifetimed `GlyphCalculatorGuard` with side-effects on drop.
// This makes stuff quite inconvenient. A manual method for trimming the
// cache would make our lives easier.
loop {
let action = self
.measure_brush
.borrow_mut()
.process_queued(|_, _| {}, |_| {});
match action {
Ok(_) => break,
Err(glyph_brush::BrushError::TextureTooSmall { suggested }) => {
let (width, height) = suggested;
self.measure_brush
.borrow_mut()
.resize_texture(width, height);
}
}
}
}
pub fn find_font(&self, font: iced_native::Font) -> glow_glyph::FontId {
match font {
iced_native::Font::Default => glow_glyph::FontId(0),
iced_native::Font::External { name, bytes } => {
if let Some(font_id) = self.draw_font_map.borrow().get(name) {
return *font_id;
}
let font = ab_glyph::FontArc::try_from_slice(bytes)
.expect("Load font");
let _ = self.measure_brush.borrow_mut().add_font(font.clone());
let font_id = self.draw_brush.borrow_mut().add_font(font);
let _ = self
.draw_font_map
.borrow_mut()
.insert(String::from(name), font_id);
font_id
}
}
}
}

595
glow/src/triangle.rs
View file

@ -1,595 +0,0 @@
//! Draw meshes of triangles.
use crate::program;
use crate::Transformation;
use iced_graphics::gradient::Gradient;
use iced_graphics::layer::mesh::{self, Mesh};
use iced_graphics::triangle::{ColoredVertex2D, Vertex2D};
use glow::HasContext;
use std::marker::PhantomData;
#[cfg(feature = "tracing")]
use tracing::info_span;
const DEFAULT_VERTICES: usize = 1_000;
const DEFAULT_INDICES: usize = 1_000;
#[derive(Debug)]
pub(crate) struct Pipeline {
indices: Buffer<u32>,
solid: solid::Program,
gradient: gradient::Program,
}
impl Pipeline {
pub fn new(gl: &glow::Context, shader_version: &program::Version) -> Self {
let mut indices = unsafe {
Buffer::new(
gl,
glow::ELEMENT_ARRAY_BUFFER,
glow::DYNAMIC_DRAW,
DEFAULT_INDICES,
)
};
let solid = solid::Program::new(gl, shader_version);
let gradient = gradient::Program::new(gl, shader_version);
unsafe {
gl.bind_vertex_array(Some(solid.vertex_array));
indices.bind(gl, 0);
gl.bind_vertex_array(Some(gradient.vertex_array));
indices.bind(gl, 0);
gl.bind_vertex_array(None);
}
Self {
indices,
solid,
gradient,
}
}
pub fn draw(
&mut self,
meshes: &[Mesh<'_>],
gl: &glow::Context,
target_height: u32,
transformation: Transformation,
scale_factor: f32,
) {
#[cfg(feature = "tracing")]
let _ = info_span!("Glow::Triangle", "DRAW").enter();
unsafe {
gl.enable(glow::MULTISAMPLE);
gl.enable(glow::SCISSOR_TEST);
}
// Count the total amount of vertices & indices we need to handle
let count = mesh::attribute_count_of(meshes);
// Then we ensure the current attribute buffers are big enough, resizing if necessary
unsafe {
self.indices.bind(gl, count.indices);
}
// We upload all the vertices and indices upfront
let mut solid_vertex_offset = 0;
let mut gradient_vertex_offset = 0;
let mut index_offset = 0;
for mesh in meshes {
let indices = mesh.indices();
unsafe {
gl.buffer_sub_data_u8_slice(
glow::ELEMENT_ARRAY_BUFFER,
(index_offset * std::mem::size_of::<u32>()) as i32,
bytemuck::cast_slice(indices),
);
index_offset += indices.len();
}
match mesh {
Mesh::Solid { buffers, .. } => {
unsafe {
self.solid.vertices.bind(gl, count.solid_vertices);
gl.buffer_sub_data_u8_slice(
glow::ARRAY_BUFFER,
(solid_vertex_offset
* std::mem::size_of::<ColoredVertex2D>())
as i32,
bytemuck::cast_slice(&buffers.vertices),
);
}
solid_vertex_offset += buffers.vertices.len();
}
Mesh::Gradient { buffers, .. } => {
unsafe {
self.gradient
.vertices
.bind(gl, count.gradient_vertices);
gl.buffer_sub_data_u8_slice(
glow::ARRAY_BUFFER,
(gradient_vertex_offset
* std::mem::size_of::<Vertex2D>())
as i32,
bytemuck::cast_slice(&buffers.vertices),
);
}
gradient_vertex_offset += buffers.vertices.len();
}
}
}
// Then we draw each mesh using offsets
let mut last_solid_vertex = 0;
let mut last_gradient_vertex = 0;
let mut last_index = 0;
for mesh in meshes {
let indices = mesh.indices();
let origin = mesh.origin();
let transform =
transformation * Transformation::translate(origin.x, origin.y);
let clip_bounds = (mesh.clip_bounds() * scale_factor).snap();
unsafe {
gl.scissor(
clip_bounds.x as i32,
(target_height - (clip_bounds.y + clip_bounds.height))
as i32,
clip_bounds.width as i32,
clip_bounds.height as i32,
);
}
match mesh {
Mesh::Solid { buffers, .. } => unsafe {
gl.use_program(Some(self.solid.program));
gl.bind_vertex_array(Some(self.solid.vertex_array));
if transform != self.solid.uniforms.transform {
gl.uniform_matrix_4_f32_slice(
Some(&self.solid.uniforms.transform_location),
false,
transform.as_ref(),
);
self.solid.uniforms.transform = transform;
}
gl.draw_elements_base_vertex(
glow::TRIANGLES,
indices.len() as i32,
glow::UNSIGNED_INT,
(last_index * std::mem::size_of::<u32>()) as i32,
last_solid_vertex as i32,
);
last_solid_vertex += buffers.vertices.len();
},
Mesh::Gradient {
buffers, gradient, ..
} => unsafe {
gl.use_program(Some(self.gradient.program));
gl.bind_vertex_array(Some(self.gradient.vertex_array));
if transform != self.gradient.uniforms.transform {
gl.uniform_matrix_4_f32_slice(
Some(&self.gradient.uniforms.locations.transform),
false,
transform.as_ref(),
);
self.gradient.uniforms.transform = transform;
}
if &self.gradient.uniforms.gradient != *gradient {
match gradient {
Gradient::Linear(linear) => {
gl.uniform_4_f32(
Some(
&self
.gradient
.uniforms
.locations
.gradient_direction,
),
linear.start.x,
linear.start.y,
linear.end.x,
linear.end.y,
);
gl.uniform_1_i32(
Some(
&self
.gradient
.uniforms
.locations
.color_stops_size,
),
(linear.color_stops.len() * 2) as i32,
);
let mut stops = [0.0; 128];
for (index, stop) in linear
.color_stops
.iter()
.enumerate()
.take(16)
{
let [r, g, b, a] = stop.color.into_linear();
stops[index * 8] = r;
stops[(index * 8) + 1] = g;
stops[(index * 8) + 2] = b;
stops[(index * 8) + 3] = a;
stops[(index * 8) + 4] = stop.offset;
stops[(index * 8) + 5] = 0.;
stops[(index * 8) + 6] = 0.;
stops[(index * 8) + 7] = 0.;
}
gl.uniform_4_f32_slice(
Some(
&self
.gradient
.uniforms
.locations
.color_stops,
),
&stops,
);
}
}
self.gradient.uniforms.gradient = (*gradient).clone();
}
gl.draw_elements_base_vertex(
glow::TRIANGLES,
indices.len() as i32,
glow::UNSIGNED_INT,
(last_index * std::mem::size_of::<u32>()) as i32,
last_gradient_vertex as i32,
);
last_gradient_vertex += buffers.vertices.len();
},
}
last_index += indices.len();
}
unsafe {
gl.bind_vertex_array(None);
gl.disable(glow::SCISSOR_TEST);
gl.disable(glow::MULTISAMPLE);
}
}
}
#[derive(Debug)]
pub struct Buffer<T> {
raw: <glow::Context as HasContext>::Buffer,
target: u32,
usage: u32,
size: usize,
phantom: PhantomData<T>,
}
impl<T> Buffer<T> {
pub unsafe fn new(
gl: &glow::Context,
target: u32,
usage: u32,
size: usize,
) -> Self {
let raw = gl.create_buffer().expect("Create buffer");
let mut buffer = Buffer {
raw,
target,
usage,
size: 0,
phantom: PhantomData,
};
buffer.bind(gl, size);
buffer
}
pub unsafe fn bind(&mut self, gl: &glow::Context, size: usize) {
gl.bind_buffer(self.target, Some(self.raw));
if self.size < size {
gl.buffer_data_size(
self.target,
(size * std::mem::size_of::<T>()) as i32,
self.usage,
);
self.size = size;
}
}
}
mod solid {
use crate::program;
use crate::triangle;
use glow::{Context, HasContext, NativeProgram};
use iced_graphics::triangle::ColoredVertex2D;
use iced_graphics::Transformation;
#[derive(Debug)]
pub struct Program {
pub program: <Context as HasContext>::Program,
pub vertex_array: <glow::Context as HasContext>::VertexArray,
pub vertices: triangle::Buffer<ColoredVertex2D>,
pub uniforms: Uniforms,
}
impl Program {
pub fn new(gl: &Context, shader_version: &program::Version) -> Self {
let program = unsafe {
let vertex_shader = program::Shader::vertex(
gl,
shader_version,
include_str!("shader/common/solid.vert"),
);
let fragment_shader = program::Shader::fragment(
gl,
shader_version,
include_str!("shader/common/solid.frag"),
);
program::create(
gl,
&[vertex_shader, fragment_shader],
&[(0, "i_Position"), (1, "i_Color")],
)
};
let vertex_array = unsafe {
gl.create_vertex_array().expect("Create vertex array")
};
let vertices = unsafe {
triangle::Buffer::new(
gl,
glow::ARRAY_BUFFER,
glow::DYNAMIC_DRAW,
super::DEFAULT_VERTICES,
)
};
unsafe {
gl.bind_vertex_array(Some(vertex_array));
let stride = std::mem::size_of::<ColoredVertex2D>() as i32;
gl.enable_vertex_attrib_array(0);
gl.vertex_attrib_pointer_f32(
0,
2,
glow::FLOAT,
false,
stride,
0,
);
gl.enable_vertex_attrib_array(1);
gl.vertex_attrib_pointer_f32(
1,
4,
glow::FLOAT,
false,
stride,
4 * 2,
);
gl.bind_vertex_array(None);
};
Self {
program,
vertex_array,
vertices,
uniforms: Uniforms::new(gl, program),
}
}
}
#[derive(Debug)]
pub struct Uniforms {
pub transform: Transformation,
pub transform_location: <Context as HasContext>::UniformLocation,
}
impl Uniforms {
fn new(gl: &Context, program: NativeProgram) -> Self {
let transform = Transformation::identity();
let transform_location =
unsafe { gl.get_uniform_location(program, "u_Transform") }
.expect("Solid - Get u_Transform.");
unsafe {
gl.use_program(Some(program));
gl.uniform_matrix_4_f32_slice(
Some(&transform_location),
false,
transform.as_ref(),
);
gl.use_program(None);
}
Self {
transform,
transform_location,
}
}
}
}
mod gradient {
use crate::program;
use crate::triangle;
use glow::{Context, HasContext, NativeProgram};
use iced_graphics::gradient::{self, Gradient};
use iced_graphics::triangle::Vertex2D;
use iced_graphics::Transformation;
#[derive(Debug)]
pub struct Program {
pub program: <Context as HasContext>::Program,
pub vertex_array: <glow::Context as HasContext>::VertexArray,
pub vertices: triangle::Buffer<Vertex2D>,
pub uniforms: Uniforms,
}
impl Program {
pub fn new(gl: &Context, shader_version: &program::Version) -> Self {
let program = unsafe {
let vertex_shader = program::Shader::vertex(
gl,
shader_version,
include_str!("shader/common/gradient.vert"),
);
let fragment_shader = program::Shader::fragment(
gl,
shader_version,
include_str!("shader/common/gradient.frag"),
);
program::create(
gl,
&[vertex_shader, fragment_shader],
&[(0, "i_Position")],
)
};
let vertex_array = unsafe {
gl.create_vertex_array().expect("Create vertex array")
};
let vertices = unsafe {
triangle::Buffer::new(
gl,
glow::ARRAY_BUFFER,
glow::DYNAMIC_DRAW,
super::DEFAULT_VERTICES,
)
};
unsafe {
gl.bind_vertex_array(Some(vertex_array));
let stride = std::mem::size_of::<Vertex2D>() as i32;
gl.enable_vertex_attrib_array(0);
gl.vertex_attrib_pointer_f32(
0,
2,
glow::FLOAT,
false,
stride,
0,
);
gl.bind_vertex_array(None);
};
Self {
program,
vertex_array,
vertices,
uniforms: Uniforms::new(gl, program),
}
}
}
#[derive(Debug)]
pub struct Uniforms {
pub gradient: Gradient,
pub transform: Transformation,
pub locations: Locations,
}
#[derive(Debug)]
pub struct Locations {
pub gradient_direction: <Context as HasContext>::UniformLocation,
pub color_stops_size: <Context as HasContext>::UniformLocation,
//currently the maximum number of stops is 16 due to lack of SSBO in GL2.1
pub color_stops: <Context as HasContext>::UniformLocation,
pub transform: <Context as HasContext>::UniformLocation,
}
impl Uniforms {
fn new(gl: &Context, program: NativeProgram) -> Self {
let gradient_direction = unsafe {
gl.get_uniform_location(program, "gradient_direction")
}
.expect("Gradient - Get gradient_direction.");
let color_stops_size =
unsafe { gl.get_uniform_location(program, "color_stops_size") }
.expect("Gradient - Get color_stops_size.");
let color_stops = unsafe {
gl.get_uniform_location(program, "color_stops")
.expect("Gradient - Get color_stops.")
};
let transform = Transformation::identity();
let transform_location =
unsafe { gl.get_uniform_location(program, "u_Transform") }
.expect("Solid - Get u_Transform.");
unsafe {
gl.use_program(Some(program));
gl.uniform_matrix_4_f32_slice(
Some(&transform_location),
false,
transform.as_ref(),
);
gl.use_program(None);
}
Self {
gradient: Gradient::Linear(gradient::Linear {
start: Default::default(),
end: Default::default(),
color_stops: vec![],
}),
transform: Transformation::identity(),
locations: Locations {
gradient_direction,
color_stops_size,
color_stops,
transform: transform_location,
},
}
}
}
}

4
glow/src/window.rs
View file

@ -1,4 +0,0 @@
//! Display rendering results on windows.
mod compositor;
pub use compositor::Compositor;

111
glow/src/window/compositor.rs
View file

@ -1,111 +0,0 @@
use crate::{Backend, Color, Error, Renderer, Settings, Viewport};
use glow::HasContext;
use iced_graphics::{compositor, Antialiasing, Size};
use core::ffi::c_void;
use std::marker::PhantomData;
/// A window graphics backend for iced powered by `glow`.
#[allow(missing_debug_implementations)]
pub struct Compositor<Theme> {
gl: glow::Context,
theme: PhantomData<Theme>,
}
impl<Theme> iced_graphics::window::GLCompositor for Compositor<Theme> {
type Settings = Settings;
type Renderer = Renderer<Theme>;
unsafe fn new(
settings: Self::Settings,
loader_function: impl FnMut(&str) -> *const c_void,
) -> Result<(Self, Self::Renderer), Error> {
let gl = glow::Context::from_loader_function(loader_function);
log::info!("{:#?}", settings);
let version = gl.version();
log::info!(
"OpenGL version: {:?} (Embedded: {})",
version,
version.is_embedded
);
let renderer = gl.get_parameter_string(glow::RENDERER);
log::info!("Renderer: {}", renderer);
// Enable auto-conversion from/to sRGB
gl.enable(glow::FRAMEBUFFER_SRGB);
// Enable alpha blending
gl.enable(glow::BLEND);
gl.blend_func_separate(
glow::SRC_ALPHA,
glow::ONE_MINUS_SRC_ALPHA,
glow::ONE,
glow::ONE_MINUS_SRC_ALPHA,
);
// Disable multisampling by default
gl.disable(glow::MULTISAMPLE);
let renderer = Renderer::new(Backend::new(&gl, settings));
Ok((
Self {
gl,
theme: PhantomData,
},
renderer,
))
}
fn sample_count(settings: &Settings) -> u32 {
settings
.antialiasing
.map(Antialiasing::sample_count)
.unwrap_or(0)
}
fn resize_viewport(&mut self, physical_size: Size<u32>) {
unsafe {
self.gl.viewport(
0,
0,
physical_size.width as i32,
physical_size.height as i32,
);
}
}
fn fetch_information(&self) -> compositor::Information {
let adapter = unsafe { self.gl.get_parameter_string(glow::RENDERER) };
compositor::Information {
backend: format!("{:?}", self.gl.version()),
adapter,
}
}
fn present<T: AsRef<str>>(
&mut self,
renderer: &mut Self::Renderer,
viewport: &Viewport,
color: Color,
overlay: &[T],
) {
let gl = &self.gl;
let [r, g, b, a] = color.into_linear();
unsafe {
gl.clear_color(r, g, b, a);
gl.clear(glow::COLOR_BUFFER_BIT);
}
renderer.with_primitives(|backend, primitive| {
backend.present(gl, primitive, viewport, overlay);
});
}
}

7
graphics/Cargo.toml
View file

@ -26,9 +26,6 @@ dds = ["image_rs/dds"]
farbfeld = ["image_rs/farbfeld"]
canvas = ["lyon"]
qr_code = ["qrcode", "canvas"]
font-source = ["font-kit"]
font-fallback = []
font-icons = []
opengl = []
image_rs = ["kamadak-exif"]
@ -60,10 +57,6 @@ version = "0.12"
optional = true
default-features = false
[dependencies.font-kit]
version = "0.10"
optional = true
[dependencies.image_rs]
version = "0.24"
package = "image"

35
graphics/src/font.rs
View file

@ -1,35 +0,0 @@
//! Find system fonts or use the built-in ones.
#[cfg(feature = "font-source")]
mod source;
#[cfg(feature = "font-source")]
#[cfg_attr(docsrs, doc(cfg(feature = "font-source")))]
pub use source::Source;
#[cfg(feature = "font-source")]
#[cfg_attr(docsrs, doc(cfg(feature = "font-source")))]
pub use font_kit::{
error::SelectionError as LoadError, family_name::FamilyName as Family,
};
/// A built-in fallback font, for convenience.
#[cfg(feature = "font-fallback")]
#[cfg_attr(docsrs, doc(cfg(feature = "font-fallback")))]
pub const FALLBACK: &[u8] = include_bytes!("../fonts/Lato-Regular.ttf");
/// A built-in icon font, for convenience.
#[cfg(feature = "font-icons")]
#[cfg_attr(docsrs, doc(cfg(feature = "font-icons")))]
pub const ICONS: iced_native::Font = iced_native::Font::External {
name: "iced_wgpu icons",
bytes: include_bytes!("../fonts/Icons.ttf"),
};
/// The `char` representing a ✔ icon in the built-in [`ICONS`] font.
#[cfg(feature = "font-icons")]
#[cfg_attr(docsrs, doc(cfg(feature = "font-icons")))]
pub const CHECKMARK_ICON: char = '\u{F00C}';
/// The `char` representing a ▼ icon in the built-in [`ICONS`] font.
#[cfg(feature = "font-icons")]
pub const ARROW_DOWN_ICON: char = '\u{E800}';

45
graphics/src/font/source.rs
View file

@ -1,45 +0,0 @@
use crate::font::{Family, LoadError};
/// A font source that can find and load system fonts.
#[allow(missing_debug_implementations)]
pub struct Source {
raw: font_kit::source::SystemSource,
}
impl Source {
/// Creates a new [`Source`].
pub fn new() -> Self {
Source {
raw: font_kit::source::SystemSource::new(),
}
}
/// Finds and loads a font matching the set of provided family priorities.
pub fn load(&self, families: &[Family]) -> Result<Vec<u8>, LoadError> {
let font = self.raw.select_best_match(
families,
&font_kit::properties::Properties::default(),
)?;
match font {
font_kit::handle::Handle::Path { path, .. } => {
use std::io::Read;
let mut buf = Vec::new();
let mut reader = std::fs::File::open(path).expect("Read font");
let _ = reader.read_to_end(&mut buf);
Ok(buf)
}
font_kit::handle::Handle::Memory { bytes, .. } => {
Ok(bytes.as_ref().clone())
}
}
}
}
impl Default for Source {
fn default() -> Self {
Self::new()
}
}

1
graphics/src/lib.rs
View file

@ -28,7 +28,6 @@ mod transformation;
mod viewport;
pub mod backend;
pub mod font;
pub mod gradient;
pub mod image;
pub mod layer;

4
wgpu/Cargo.toml
View file

@ -23,14 +23,11 @@ dds = ["iced_graphics/dds"]
farbfeld = ["iced_graphics/farbfeld"]
canvas = ["iced_graphics/canvas"]
qr_code = ["iced_graphics/qr_code"]
default_system_font = ["iced_graphics/font-source"]
spirv = ["wgpu/spirv"]
webgl = ["wgpu/webgl"]
[dependencies]
wgpu = "0.14"
wgpu_glyph = "0.18"
glyph_brush = "0.7"
raw-window-handle = "0.5"
log = "0.4"
guillotiere = "0.6"
@ -48,7 +45,6 @@ path = "../native"
[dependencies.iced_graphics]
version = "0.7"
path = "../graphics"
features = ["font-fallback", "font-icons"]
[dependencies.tracing]
version = "0.1.6"

86
wgpu/src/backend.rs
View file

@ -4,10 +4,8 @@ use crate::triangle;
use crate::{Settings, Transformation};
use iced_graphics::backend;
use iced_graphics::font;
use iced_graphics::layer::Layer;
use iced_graphics::{Primitive, Viewport};
use iced_native::alignment;
use iced_native::{Font, Size};
#[cfg(feature = "tracing")]
@ -173,83 +171,11 @@ impl Backend {
}
if !layer.text.is_empty() {
for text in layer.text.iter() {
// Target physical coordinates directly to avoid blurry text
let text = wgpu_glyph::Section {
// TODO: We `round` here to avoid rerasterizing text when
// its position changes slightly. This can make text feel a
// bit "jumpy". We may be able to do better once we improve
// our text rendering/caching pipeline.
screen_position: (
(text.bounds.x * scale_factor).round(),
(text.bounds.y * scale_factor).round(),
),
// TODO: Fix precision issues with some scale factors.
//
// The `ceil` here can cause some words to render on the
// same line when they should not.
//
// Ideally, `wgpu_glyph` should be able to compute layout
// using logical positions, and then apply the proper
// scaling when rendering. This would ensure that both
// measuring and rendering follow the same layout rules.
bounds: (
(text.bounds.width * scale_factor).ceil(),
(text.bounds.height * scale_factor).ceil(),
),
text: vec![wgpu_glyph::Text {
text: text.content,
scale: wgpu_glyph::ab_glyph::PxScale {
x: text.size * scale_factor,
y: text.size * scale_factor,
},
font_id: self.text_pipeline.find_font(text.font),
extra: wgpu_glyph::Extra {
color: text.color,
z: 0.0,
},
}],
layout: wgpu_glyph::Layout::default()
.h_align(match text.horizontal_alignment {
alignment::Horizontal::Left => {
wgpu_glyph::HorizontalAlign::Left
}
alignment::Horizontal::Center => {
wgpu_glyph::HorizontalAlign::Center
}
alignment::Horizontal::Right => {
wgpu_glyph::HorizontalAlign::Right
}
})
.v_align(match text.vertical_alignment {
alignment::Vertical::Top => {
wgpu_glyph::VerticalAlign::Top
}
alignment::Vertical::Center => {
wgpu_glyph::VerticalAlign::Center
}
alignment::Vertical::Bottom => {
wgpu_glyph::VerticalAlign::Bottom
}
}),
};
self.text_pipeline.queue(text);
for _text in layer.text.iter() {
// TODO: Queue text sections
}
self.text_pipeline.draw_queued(
device,
staging_belt,
encoder,
target,
transformation,
wgpu_glyph::Region {
x: bounds.x,
y: bounds.y,
width: bounds.width,
height: bounds.height,
},
);
// TODO: Draw queued
}
}
}
@ -261,9 +187,9 @@ impl iced_graphics::Backend for Backend {
}
impl backend::Text for Backend {
const ICON_FONT: Font = font::ICONS;
const CHECKMARK_ICON: char = font::CHECKMARK_ICON;
const ARROW_DOWN_ICON: char = font::ARROW_DOWN_ICON;
const ICON_FONT: Font = Font::Default; // TODO
const CHECKMARK_ICON: char = '✓';
const ARROW_DOWN_ICON: char = '▼';
fn default_size(&self) -> f32 {
self.default_text_size

262
wgpu/src/text.rs
View file

@ -1,265 +1,39 @@
use crate::Transformation;
use iced_graphics::font;
use std::{cell::RefCell, collections::HashMap};
use wgpu_glyph::ab_glyph;
pub use iced_native::text::Hit;
#[derive(Debug)]
pub struct Pipeline {
draw_brush: RefCell<wgpu_glyph::GlyphBrush<()>>,
draw_font_map: RefCell<HashMap<String, wgpu_glyph::FontId>>,
measure_brush: RefCell<glyph_brush::GlyphBrush<()>>,
}
pub struct Pipeline;
impl Pipeline {
pub fn new(
device: &wgpu::Device,
format: wgpu::TextureFormat,
default_font: Option<&[u8]>,
multithreading: bool,
_device: &wgpu::Device,
_format: wgpu::TextureFormat,
_default_font: Option<&[u8]>,
_multithreading: bool,
) -> Self {
let default_font = default_font.map(|slice| slice.to_vec());
// TODO: Font customization
#[cfg(not(target_os = "ios"))]
#[cfg(feature = "default_system_font")]
let default_font = {
default_font.or_else(|| {
font::Source::new()
.load(&[font::Family::SansSerif, font::Family::Serif])
.ok()
})
};
let default_font =
default_font.unwrap_or_else(|| font::FALLBACK.to_vec());
let font = ab_glyph::FontArc::try_from_vec(default_font)
.unwrap_or_else(|_| {
log::warn!(
"System font failed to load. Falling back to \
embedded font..."
);
ab_glyph::FontArc::try_from_slice(font::FALLBACK)
.expect("Load fallback font")
});
let draw_brush_builder =
wgpu_glyph::GlyphBrushBuilder::using_font(font.clone())
.initial_cache_size((2048, 2048))
.draw_cache_multithread(multithreading);
#[cfg(target_arch = "wasm32")]
let draw_brush_builder = draw_brush_builder.draw_cache_align_4x4(true);
let draw_brush = draw_brush_builder.build(device, format);
let measure_brush =
glyph_brush::GlyphBrushBuilder::using_font(font).build();
Pipeline {
draw_brush: RefCell::new(draw_brush),
draw_font_map: RefCell::new(HashMap::new()),
measure_brush: RefCell::new(measure_brush),
}
}
pub fn queue(&mut self, section: wgpu_glyph::Section<'_>) {
self.draw_brush.borrow_mut().queue(section);
}
pub fn draw_queued(
&mut self,
device: &wgpu::Device,
staging_belt: &mut wgpu::util::StagingBelt,
encoder: &mut wgpu::CommandEncoder,
target: &wgpu::TextureView,
transformation: Transformation,
region: wgpu_glyph::Region,
) {
self.draw_brush
.borrow_mut()
.draw_queued_with_transform_and_scissoring(
device,
staging_belt,
encoder,
target,
transformation.into(),
region,
)
.expect("Draw text");
Pipeline
}
pub fn measure(
&self,
content: &str,
size: f32,
font: iced_native::Font,
bounds: iced_native::Size,
_content: &str,
_size: f32,
_font: iced_native::Font,
_bounds: iced_native::Size,
) -> (f32, f32) {
use wgpu_glyph::GlyphCruncher;
let wgpu_glyph::FontId(font_id) = self.find_font(font);
let section = wgpu_glyph::Section {
bounds: (bounds.width, bounds.height),
text: vec![wgpu_glyph::Text {
text: content,
scale: size.into(),
font_id: wgpu_glyph::FontId(font_id),
extra: wgpu_glyph::Extra::default(),
}],
..Default::default()
};
if let Some(bounds) =
self.measure_brush.borrow_mut().glyph_bounds(section)
{
(bounds.width().ceil(), bounds.height().ceil())
} else {
(0.0, 0.0)
}
}
pub fn hit_test(
&self,
content: &str,
size: f32,
font: iced_native::Font,
bounds: iced_native::Size,
point: iced_native::Point,
nearest_only: bool,
_content: &str,
_size: f32,
_font: iced_native::Font,
_bounds: iced_native::Size,
_point: iced_native::Point,
_nearest_only: bool,
) -> Option<Hit> {
use wgpu_glyph::GlyphCruncher;
let wgpu_glyph::FontId(font_id) = self.find_font(font);
let section = wgpu_glyph::Section {
bounds: (bounds.width, bounds.height),
text: vec![wgpu_glyph::Text {
text: content,
scale: size.into(),
font_id: wgpu_glyph::FontId(font_id),
extra: wgpu_glyph::Extra::default(),
}],
..Default::default()
};
let mut mb = self.measure_brush.borrow_mut();
// The underlying type is FontArc, so clones are cheap.
use wgpu_glyph::ab_glyph::{Font, ScaleFont};
let font = mb.fonts()[font_id].clone().into_scaled(size);
// Implements an iterator over the glyph bounding boxes.
let bounds = mb.glyphs(section).map(
|wgpu_glyph::SectionGlyph {
byte_index, glyph, ..
}| {
(
*byte_index,
iced_native::Rectangle::new(
iced_native::Point::new(
glyph.position.x - font.h_side_bearing(glyph.id),
glyph.position.y - font.ascent(),
),
iced_native::Size::new(
font.h_advance(glyph.id),
font.ascent() - font.descent(),
),
),
)
},
);
// Implements computation of the character index based on the byte index
// within the input string.
let char_index = |byte_index| {
let mut b_count = 0;
for (i, utf8_len) in
content.chars().map(|c| c.len_utf8()).enumerate()
{
if byte_index < (b_count + utf8_len) {
return i;
}
b_count += utf8_len;
None
}
byte_index
};
if !nearest_only {
for (idx, bounds) in bounds.clone() {
if bounds.contains(point) {
return Some(Hit::CharOffset(char_index(idx)));
}
}
}
let nearest = bounds
.map(|(index, bounds)| (index, bounds.center()))
.min_by(|(_, center_a), (_, center_b)| {
center_a
.distance(point)
.partial_cmp(&center_b.distance(point))
.unwrap_or(std::cmp::Ordering::Greater)
});
nearest.map(|(idx, center)| {
Hit::NearestCharOffset(char_index(idx), point - center)
})
}
pub fn trim_measurement_cache(&mut self) {
// TODO: We should probably use a `GlyphCalculator` for this. However,
// it uses a lifetimed `GlyphCalculatorGuard` with side-effects on drop.
// This makes stuff quite inconvenient. A manual method for trimming the
// cache would make our lives easier.
loop {
let action = self
.measure_brush
.borrow_mut()
.process_queued(|_, _| {}, |_| {});
match action {
Ok(_) => break,
Err(glyph_brush::BrushError::TextureTooSmall { suggested }) => {
let (width, height) = suggested;
self.measure_brush
.borrow_mut()
.resize_texture(width, height);
}
}
}
}
pub fn find_font(&self, font: iced_native::Font) -> wgpu_glyph::FontId {
match font {
iced_native::Font::Default => wgpu_glyph::FontId(0),
iced_native::Font::External { name, bytes } => {
if let Some(font_id) = self.draw_font_map.borrow().get(name) {
return *font_id;
}
let font = ab_glyph::FontArc::try_from_slice(bytes)
.expect("Load font");
let _ = self.measure_brush.borrow_mut().add_font(font.clone());
let font_id = self.draw_brush.borrow_mut().add_font(font);
let _ = self
.draw_font_map
.borrow_mut()
.insert(String::from(name), font_id);
font_id
}
}
}
pub fn trim_measurement_cache(&mut self) {}
}