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it's going, but it doesn't actually work

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Jonathan Spira 2024-06-13 21:32:12 -04:00
parent 8e3da3ba15
commit 4a8bf5cd9b
45 changed files with 4 additions and 6560 deletions
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5
Cargo.toml
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@ -2,11 +2,6 @@
members = [
"imgui",
"imgui-sys",
"imgui-glium-renderer",
"imgui-glow-renderer",
"imgui-sdl2-support",
"imgui-winit-support",
"imgui-winit-glow-renderer-viewports",
"imgui-examples",
"xtask",
]

13
imgui-examples/Cargo.toml
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@ -13,13 +13,8 @@ copypasta = "0.8"
glium = { version = "0.34.0", default-features = true }
image = "0.23"
imgui = { path = "../imgui", features = ["tables-api"] }
imgui-glium-renderer = { path = "../imgui-glium-renderer" }
imgui-winit-support = { path = "../imgui-winit-support" }
# Pin indirect dependency scoped-tls to 1.0.0
# as 1.0.1 bumped MSRV to 1.59
# Used only in
# imgui-examples -> glium -> glutin -> wayland-client -> scoped-tls
# so not worth bumping MSRV for this basically to keep CI happy
# FIXME: Remove this for imgui-rs v0.10 and bump MSRV
scoped-tls = "=1.0.0"
[dependencies]
imgui-glium-renderer = "0.12.0"
# imgui-glium-renderer = { path = "../imgui-glium-renderer" }
# imgui-winit-support = { path = "../imgui-winit-support" }

22
imgui-glium-renderer/Cargo.toml
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@ -1,22 +0,0 @@
[package]
name = "imgui-glium-renderer"
version = "0.12.0"
edition = "2021"
description = "Glium renderer for the imgui crate"
homepage = "https://github.com/imgui-rs/imgui-rs"
repository = "https://github.com/imgui-rs/imgui-rs"
documentation = "https://docs.rs/imgui-glium-renderer"
license = "MIT OR Apache-2.0"
categories = ["gui", "rendering"]
[dependencies]
glium = { version = "0.34.0", default-features = false }
imgui = { version = "0.12.0", path = "../imgui" }
[dev-dependencies]
glium = { version = "0.34.0", default-features = false, features = ["glutin_backend"] }
imgui-winit-support = {path = "../imgui-winit-support"}
glutin = "0.31"
glutin-winit = "0.4.2"
winit = { version = "0.29.3", features = ["rwh_05"] }
raw-window-handle = "0.5.0"

202
imgui-glium-renderer/LICENSE-APACHE
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@ -1,202 +0,0 @@
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19
imgui-glium-renderer/LICENSE-MIT
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@ -1,19 +0,0 @@
Copyright (c) 2021 The imgui-rs Developers
Permission is hereby granted, free of charge, to any person obtaining a copy
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

149
imgui-glium-renderer/examples/glium_01_basic.rs
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@ -1,149 +0,0 @@
use std::num::NonZeroU32;
use glium::Surface;
use glutin::{
config::ConfigTemplateBuilder,
context::{ContextAttributesBuilder, NotCurrentGlContext},
display::{GetGlDisplay, GlDisplay},
surface::{SurfaceAttributesBuilder, WindowSurface},
};
use imgui_winit_support::winit::{dpi::LogicalSize, event_loop::EventLoop, window::WindowBuilder};
use raw_window_handle::HasRawWindowHandle;
use winit::{
event::{Event, WindowEvent},
window::Window,
};
const TITLE: &str = "Hello, imgui-rs!";
fn main() {
// Common setup for creating a winit window and imgui context, not specifc
// to this renderer at all except that glutin is used to create the window
// since it will give us access to a GL context
let (event_loop, window, display) = create_window();
let (mut winit_platform, mut imgui_context) = imgui_init(&window);
// Create renderer from this crate
let mut renderer = imgui_glium_renderer::Renderer::init(&mut imgui_context, &display)
.expect("Failed to initialize renderer");
// Timer for FPS calculation
let mut last_frame = std::time::Instant::now();
// Standard winit event loop
event_loop
.run(move |event, window_target| match event {
Event::NewEvents(_) => {
let now = std::time::Instant::now();
imgui_context.io_mut().update_delta_time(now - last_frame);
last_frame = now;
}
Event::AboutToWait => {
winit_platform
.prepare_frame(imgui_context.io_mut(), &window)
.expect("Failed to prepare frame");
window.request_redraw();
}
Event::WindowEvent {
event: WindowEvent::RedrawRequested,
..
} => {
// Create frame for the all important `&imgui::Ui`
let ui = imgui_context.frame();
// Draw our example content
ui.show_demo_window(&mut true);
// Setup for drawing
let mut target = display.draw();
// Renderer doesn't automatically clear window
target.clear_color_srgb(1.0, 1.0, 1.0, 1.0);
// Perform rendering
winit_platform.prepare_render(ui, &window);
let draw_data = imgui_context.render();
renderer
.render(&mut target, draw_data)
.expect("Rendering failed");
target.finish().expect("Failed to swap buffers");
}
Event::WindowEvent {
event: WindowEvent::CloseRequested,
..
} => window_target.exit(),
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::Resized(new_size),
..
} => {
if new_size.width > 0 && new_size.height > 0 {
display.resize((new_size.width, new_size.height));
}
winit_platform.handle_event(imgui_context.io_mut(), &window, &event);
}
event => {
winit_platform.handle_event(imgui_context.io_mut(), &window, &event);
}
})
.expect("EventLoop error");
}
fn create_window() -> (EventLoop<()>, Window, glium::Display<WindowSurface>) {
let event_loop = EventLoop::new().expect("Failed to create EventLoop");
let window_builder = WindowBuilder::new()
.with_title(TITLE)
.with_inner_size(LogicalSize::new(1024, 768));
let (window, cfg) = glutin_winit::DisplayBuilder::new()
.with_window_builder(Some(window_builder))
.build(&event_loop, ConfigTemplateBuilder::new(), |mut configs| {
configs.next().unwrap()
})
.expect("Failed to create OpenGL window");
let window = window.unwrap();
let context_attribs = ContextAttributesBuilder::new().build(Some(window.raw_window_handle()));
let context = unsafe {
cfg.display()
.create_context(&cfg, &context_attribs)
.expect("Failed to create OpenGL context")
};
let surface_attribs = SurfaceAttributesBuilder::<WindowSurface>::new().build(
window.raw_window_handle(),
NonZeroU32::new(1024).unwrap(),
NonZeroU32::new(768).unwrap(),
);
let surface = unsafe {
cfg.display()
.create_window_surface(&cfg, &surface_attribs)
.expect("Failed to create OpenGL surface")
};
let context = context
.make_current(&surface)
.expect("Failed to make OpenGL context current");
let display = glium::Display::from_context_surface(context, surface)
.expect("Failed to create glium Display");
(event_loop, window, display)
}
fn imgui_init(window: &Window) -> (imgui_winit_support::WinitPlatform, imgui::Context) {
let mut imgui_context = imgui::Context::create();
imgui_context.set_ini_filename(None);
let mut winit_platform = imgui_winit_support::WinitPlatform::init(&mut imgui_context);
let dpi_mode = imgui_winit_support::HiDpiMode::Default;
winit_platform.attach_window(imgui_context.io_mut(), window, dpi_mode);
imgui_context
.fonts()
.add_font(&[imgui::FontSource::DefaultFontData { config: None }]);
(winit_platform, imgui_context)
}

349
imgui-glium-renderer/src/lib.rs
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@ -1,349 +0,0 @@
pub extern crate glium;
pub extern crate imgui;
use glium::backend::{Context, Facade};
use glium::index::{self, PrimitiveType};
use glium::program::ProgramChooserCreationError;
use glium::texture::{ClientFormat, MipmapsOption, RawImage2d, TextureCreationError};
use glium::uniforms::{
MagnifySamplerFilter, MinifySamplerFilter, Sampler, SamplerBehavior, SamplerWrapFunction,
};
use glium::{
program, uniform, vertex, Blend, BlendingFunction, DrawError, DrawParameters, IndexBuffer,
LinearBlendingFactor, Program, Rect, Surface, Texture2d, VertexBuffer,
};
use imgui::internal::RawWrapper;
use imgui::{BackendFlags, DrawCmd, DrawCmdParams, DrawData, TextureId, Textures};
use std::borrow::Cow;
use std::error::Error;
use std::fmt;
use std::rc::Rc;
use std::usize;
#[derive(Clone, Debug)]
pub enum RendererError {
Vertex(vertex::BufferCreationError),
Index(index::BufferCreationError),
Program(ProgramChooserCreationError),
Texture(TextureCreationError),
Draw(DrawError),
BadTexture(TextureId),
}
impl Error for RendererError {
fn source(&self) -> Option<&(dyn Error + 'static)> {
use self::RendererError::*;
match *self {
Vertex(ref e) => Some(e),
Index(ref e) => Some(e),
Program(ref e) => Some(e),
Texture(ref e) => Some(e),
Draw(ref e) => Some(e),
BadTexture(_) => None,
}
}
}
impl fmt::Display for RendererError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::RendererError::*;
match *self {
Vertex(_) => write!(f, "Vertex buffer creation failed"),
Index(_) => write!(f, "Index buffer creation failed"),
Program(ref e) => write!(f, "Program creation failed: {}", e),
Texture(_) => write!(f, "Texture creation failed"),
Draw(ref e) => write!(f, "Drawing failed: {}", e),
BadTexture(ref t) => write!(f, "Bad texture ID: {}", t.id()),
}
}
}
impl From<vertex::BufferCreationError> for RendererError {
fn from(e: vertex::BufferCreationError) -> RendererError {
RendererError::Vertex(e)
}
}
impl From<index::BufferCreationError> for RendererError {
fn from(e: index::BufferCreationError) -> RendererError {
RendererError::Index(e)
}
}
impl From<ProgramChooserCreationError> for RendererError {
fn from(e: ProgramChooserCreationError) -> RendererError {
RendererError::Program(e)
}
}
impl From<TextureCreationError> for RendererError {
fn from(e: TextureCreationError) -> RendererError {
RendererError::Texture(e)
}
}
impl From<DrawError> for RendererError {
fn from(e: DrawError) -> RendererError {
RendererError::Draw(e)
}
}
pub struct Texture {
pub texture: Rc<Texture2d>,
pub sampler: SamplerBehavior,
}
pub struct Renderer {
ctx: Rc<Context>,
program: Program,
font_texture: Texture,
textures: Textures<Texture>,
}
#[repr(C)]
#[derive(Copy, Clone, Debug, PartialEq)]
pub struct GliumDrawVert {
pub pos: [f32; 2],
pub uv: [f32; 2],
pub col: [u8; 4],
}
// manual impl to avoid an allocation, and to reduce macro wonkiness.
impl glium::vertex::Vertex for GliumDrawVert {
#[inline]
fn build_bindings() -> glium::vertex::VertexFormat {
use std::borrow::Cow::*;
&[
(
Borrowed("pos"),
0,
-1,
glium::vertex::AttributeType::F32F32,
false,
),
(
Borrowed("uv"),
8,
-1,
glium::vertex::AttributeType::F32F32,
false,
),
(
Borrowed("col"),
16,
-1,
glium::vertex::AttributeType::U8U8U8U8,
false,
),
]
}
}
impl Renderer {
pub fn init<F: Facade>(
ctx: &mut imgui::Context,
facade: &F,
) -> Result<Renderer, RendererError> {
let program = compile_default_program(facade)?;
let font_texture = upload_font_texture(ctx.fonts(), facade.get_context())?;
ctx.set_renderer_name(Some(format!(
"imgui-glium-renderer {}",
env!("CARGO_PKG_VERSION")
)));
ctx.io_mut()
.backend_flags
.insert(BackendFlags::RENDERER_HAS_VTX_OFFSET);
Ok(Renderer {
ctx: Rc::clone(facade.get_context()),
program,
font_texture,
textures: Textures::new(),
})
}
pub fn reload_font_texture(&mut self, ctx: &mut imgui::Context) -> Result<(), RendererError> {
self.font_texture = upload_font_texture(ctx.fonts(), &self.ctx)?;
Ok(())
}
pub fn textures(&mut self) -> &mut Textures<Texture> {
&mut self.textures
}
fn lookup_texture(&self, texture_id: TextureId) -> Result<&Texture, RendererError> {
if texture_id.id() == usize::MAX {
Ok(&self.font_texture)
} else if let Some(texture) = self.textures.get(texture_id) {
Ok(texture)
} else {
Err(RendererError::BadTexture(texture_id))
}
}
pub fn render<T: Surface>(
&mut self,
target: &mut T,
draw_data: &DrawData,
) -> Result<(), RendererError> {
let fb_width = draw_data.display_size[0] * draw_data.framebuffer_scale[0];
let fb_height = draw_data.display_size[1] * draw_data.framebuffer_scale[1];
if !(fb_width > 0.0 && fb_height > 0.0) {
return Ok(());
}
let _ = self.ctx.insert_debug_marker("imgui-rs: starting rendering");
let left = draw_data.display_pos[0];
let right = draw_data.display_pos[0] + draw_data.display_size[0];
let top = draw_data.display_pos[1];
let bottom = draw_data.display_pos[1] + draw_data.display_size[1];
let matrix = [
[(2.0 / (right - left)), 0.0, 0.0, 0.0],
[0.0, (2.0 / (top - bottom)), 0.0, 0.0],
[0.0, 0.0, -1.0, 0.0],
[
(right + left) / (left - right),
(top + bottom) / (bottom - top),
0.0,
1.0,
],
];
let clip_off = draw_data.display_pos;
let clip_scale = draw_data.framebuffer_scale;
for draw_list in draw_data.draw_lists() {
let vtx_buffer = VertexBuffer::immutable(&self.ctx, unsafe {
draw_list.transmute_vtx_buffer::<GliumDrawVert>()
})?;
let idx_buffer = IndexBuffer::immutable(
&self.ctx,
PrimitiveType::TrianglesList,
draw_list.idx_buffer(),
)?;
for cmd in draw_list.commands() {
match cmd {
DrawCmd::Elements {
count,
cmd_params:
DrawCmdParams {
clip_rect,
texture_id,
vtx_offset,
idx_offset,
..
},
} => {
let clip_rect = [
(clip_rect[0] - clip_off[0]) * clip_scale[0],
(clip_rect[1] - clip_off[1]) * clip_scale[1],
(clip_rect[2] - clip_off[0]) * clip_scale[0],
(clip_rect[3] - clip_off[1]) * clip_scale[1],
];
if clip_rect[0] < fb_width
&& clip_rect[1] < fb_height
&& clip_rect[2] >= 0.0
&& clip_rect[3] >= 0.0
{
let texture = self.lookup_texture(texture_id)?;
target.draw(
vtx_buffer
.slice(vtx_offset..)
.expect("Invalid vertex buffer range"),
idx_buffer
.slice(idx_offset..(idx_offset + count))
.expect("Invalid index buffer range"),
&self.program,
&uniform! {
matrix: matrix,
tex: Sampler(texture.texture.as_ref(), texture.sampler)
},
&DrawParameters {
blend: Blend {
alpha: BlendingFunction::Addition {
source: LinearBlendingFactor::One,
destination: LinearBlendingFactor::OneMinusSourceAlpha,
},
..Blend::alpha_blending()
},
scissor: Some(Rect {
left: f32::max(0.0, clip_rect[0]).floor() as u32,
bottom: f32::max(0.0, fb_height - clip_rect[3]).floor()
as u32,
width: (clip_rect[2] - clip_rect[0]).abs().ceil() as u32,
height: (clip_rect[3] - clip_rect[1]).abs().ceil() as u32,
}),
..DrawParameters::default()
},
)?;
}
}
DrawCmd::ResetRenderState => (), // TODO
DrawCmd::RawCallback { callback, raw_cmd } => unsafe {
callback(draw_list.raw(), raw_cmd)
},
}
}
}
let _ = self.ctx.insert_debug_marker("imgui-rs: rendering finished");
Ok(())
}
}
fn upload_font_texture(
fonts: &mut imgui::FontAtlas,
ctx: &Rc<Context>,
) -> Result<Texture, RendererError> {
let texture = fonts.build_rgba32_texture();
let data = RawImage2d {
data: Cow::Borrowed(texture.data),
width: texture.width,
height: texture.height,
format: ClientFormat::U8U8U8U8,
};
let font_texture = Texture2d::with_mipmaps(ctx, data, MipmapsOption::NoMipmap)?;
fonts.tex_id = TextureId::from(usize::MAX);
Ok(Texture {
texture: Rc::new(font_texture),
sampler: SamplerBehavior {
minify_filter: MinifySamplerFilter::Linear,
magnify_filter: MagnifySamplerFilter::Linear,
wrap_function: (
SamplerWrapFunction::BorderClamp,
SamplerWrapFunction::BorderClamp,
SamplerWrapFunction::BorderClamp,
),
..Default::default()
},
})
}
fn compile_default_program<F: Facade>(facade: &F) -> Result<Program, ProgramChooserCreationError> {
program!(
facade,
400 => {
vertex: include_str!("shader/glsl_400.vert"),
fragment: include_str!("shader/glsl_400.frag"),
outputs_srgb: true,
},
150 => {
vertex: include_str!("shader/glsl_150.vert"),
fragment: include_str!("shader/glsl_150.frag"),
outputs_srgb: true,
},
130 => {
vertex: include_str!("shader/glsl_130.vert"),
fragment: include_str!("shader/glsl_130.frag"),
outputs_srgb: true,
},
110 => {
vertex: include_str!("shader/glsl_110.vert"),
fragment: include_str!("shader/glsl_110.frag"),
outputs_srgb: true,
},
300 es => {
vertex: include_str!("shader/glsles_300.vert"),
fragment: include_str!("shader/glsles_300.frag"),
outputs_srgb: true,
},
100 es => {
vertex: include_str!("shader/glsles_100.vert"),
fragment: include_str!("shader/glsles_100.frag"),
outputs_srgb: true,
},
)
}

13
imgui-glium-renderer/src/shader/glsl_110.frag
View File

@ -1,13 +0,0 @@
#version 110
uniform sampler2D tex;
varying vec2 f_uv;
varying vec4 f_color;
// Built-in:
// vec4 gl_FragColor
void main() {
gl_FragColor = f_color * texture2D(tex, f_uv.st);
}

19
imgui-glium-renderer/src/shader/glsl_110.vert
View File

@ -1,19 +0,0 @@
#version 110
uniform mat4 matrix;
attribute vec2 pos;
attribute vec2 uv;
attribute vec4 col;
varying vec2 f_uv;
varying vec4 f_color;
// Built-in:
// vec4 gl_Position
void main() {
f_uv = uv;
f_color = col / 255.0;
gl_Position = matrix * vec4(pos.xy, 0, 1);
}

12
imgui-glium-renderer/src/shader/glsl_130.frag
View File

@ -1,12 +0,0 @@
#version 130
uniform sampler2D tex;
in vec2 f_uv;
in vec4 f_color;
out vec4 out_color;
void main() {
out_color = f_color * texture(tex, f_uv.st);
}

19
imgui-glium-renderer/src/shader/glsl_130.vert
View File

@ -1,19 +0,0 @@
#version 130
uniform mat4 matrix;
in vec2 pos;
in vec2 uv;
in vec4 col;
out vec2 f_uv;
out vec4 f_color;
// Built-in:
// vec4 gl_Position
void main() {
f_uv = uv;
f_color = col / 255.0;
gl_Position = matrix * vec4(pos.xy, 0, 1);
}

12
imgui-glium-renderer/src/shader/glsl_150.frag
View File

@ -1,12 +0,0 @@
#version 150
uniform sampler2D tex;
in vec2 f_uv;
in vec4 f_color;
out vec4 out_color;
void main() {
out_color = f_color * texture(tex, f_uv.st);
}

19
imgui-glium-renderer/src/shader/glsl_150.vert
View File

@ -1,19 +0,0 @@
#version 150
uniform mat4 matrix;
in vec2 pos;
in vec2 uv;
in vec4 col;
out vec2 f_uv;
out vec4 f_color;
// Built-in:
// vec4 gl_Position
void main() {
f_uv = uv;
f_color = col / 255.0;
gl_Position = matrix * vec4(pos.xy, 0, 1);
}

12
imgui-glium-renderer/src/shader/glsl_400.frag
View File

@ -1,12 +0,0 @@
#version 400
uniform sampler2D tex;
in vec2 f_uv;
in vec4 f_color;
out vec4 out_color;
void main() {
out_color = f_color * texture(tex, f_uv.st);
}

19
imgui-glium-renderer/src/shader/glsl_400.vert
View File

@ -1,19 +0,0 @@
#version 400
uniform mat4 matrix;
in vec2 pos;
in vec2 uv;
in vec4 col;
out vec2 f_uv;
out vec4 f_color;
// Built-in:
// vec4 gl_Position
void main() {
f_uv = uv;
f_color = col / 255.0;
gl_Position = matrix * vec4(pos.xy, 0, 1);
}

13
imgui-glium-renderer/src/shader/glsles_100.frag
View File

@ -1,13 +0,0 @@
#version 100
uniform sampler2D tex;
varying mediump vec2 f_uv;
varying lowp vec4 f_color;
// Built-in:
// vec4 gl_FragColor
void main() {
gl_FragColor = f_color * texture2D(tex, f_uv.st);
}

19
imgui-glium-renderer/src/shader/glsles_100.vert
View File

@ -1,19 +0,0 @@
#version 100
uniform mat4 matrix;
attribute mediump vec2 pos;
attribute mediump vec2 uv;
attribute lowp vec4 col;
varying mediump vec2 f_uv;
varying lowp vec4 f_color;
// Built-in:
// vec4 gl_Position
void main() {
f_uv = uv;
f_color = col / 255.0;
gl_Position = matrix * vec4(pos.xy, 0, 1);
}

12
imgui-glium-renderer/src/shader/glsles_300.frag
View File

@ -1,12 +0,0 @@
#version 300 es
uniform sampler2D tex;
in mediump vec2 f_uv;
in lowp vec4 f_color;
out lowp vec4 out_color;
void main() {
out_color = f_color * texture(tex, f_uv.st);
}

19
imgui-glium-renderer/src/shader/glsles_300.vert
View File

@ -1,19 +0,0 @@
#version 300 es
uniform mat4 matrix;
in mediump vec2 pos;
in mediump vec2 uv;
in lowp vec4 col;
out mediump vec2 f_uv;
out lowp vec4 f_color;
// Built-in:
// vec4 gl_Position
void main() {
f_uv = uv;
f_color = col / 255.0;
gl_Position = matrix * vec4(pos.xy, 0, 1);
}

55
imgui-glow-renderer/Cargo.toml
View File

@ -1,55 +0,0 @@
[package]
name = "imgui-glow-renderer"
version = "0.12.0"
edition = "2021"
description = "glow renderer for the imgui crate"
homepage = "https://github.com/imgui-rs/imgui-rs"
repository = "https://github.com/imgui-rs/imgui-rs"
license = "MIT OR Apache-2.0"
categories = ["gui", "rendering"]
[dependencies]
imgui = { version = "0.12.0", path = "../imgui" }
glow = "0.13.1"
memoffset = "0.9"
[dev-dependencies]
glutin = "0.31.1"
glutin-winit = "0.4.2"
imgui-winit-support = { version = "0.12.0", path = "../imgui-winit-support" }
image = "0.23"
raw-window-handle = "0.5.0"
winit = { version = "0.29.3", features = ["rwh_05"] }
[features]
# Features here are used to opt-out of compiling code that depends on certain
# OpenGL features. If the features are enabled, the renderer will check that the
# feature is supported before attempting to use it. Only opt-out of any of these
# if you are certain you will only target platforms that lack the corresponding
# feature.
default = [
"gl_extensions_support",
"debug_message_insert_support",
"bind_vertex_array_support",
"vertex_offset_support",
"clip_origin_support",
"bind_sampler_support",
"polygon_mode_support",
"primitive_restart_support",
]
# Enable checking for OpenGL extensions
gl_extensions_support = []
# Support for `gl.debug_message_insert`
debug_message_insert_support = []
# Support for `glBindVertexArray`
bind_vertex_array_support = []
# Support for `glDrawElementsBaseVertex`
vertex_offset_support = []
# Support for `GL_CLIP_ORIGIN`
clip_origin_support = []
# Support for `glBindSampler`
bind_sampler_support = []
# Support for `glPolygonMode`
polygon_mode_support = []
# Support for `GL_PRIMITIVE_RESTART`
primitive_restart_support = []

202
imgui-glow-renderer/LICENSE-APACHE
View File

@ -1,202 +0,0 @@
Apache License
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http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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5. Submission of Contributions. Unless You explicitly state otherwise,
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6. Trademarks. This License does not grant permission to use the trade
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7. Disclaimer of Warranty. Unless required by applicable law or
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on Your own behalf and on Your sole responsibility, not on behalf
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END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "{}"
replaced with your own identifying information. (Don't include
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Copyright 2021 the imgui-rs developers
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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See the License for the specific language governing permissions and
limitations under the License.

19
imgui-glow-renderer/LICENSE-MIT
View File

@ -1,19 +0,0 @@
Copyright (c) 2021 The imgui-rs Developers
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

178
imgui-glow-renderer/examples/glow_01_basic.rs
View File

@ -1,178 +0,0 @@
//! A basic self-contained example to get you from zero-to-demo-window as fast
//! as possible.
use std::{num::NonZeroU32, time::Instant};
use glow::HasContext;
use glutin::{
config::ConfigTemplateBuilder,
context::{ContextAttributesBuilder, NotCurrentGlContext, PossiblyCurrentContext},
display::{GetGlDisplay, GlDisplay},
surface::{GlSurface, Surface, SurfaceAttributesBuilder, WindowSurface},
};
use imgui_winit_support::{
winit::{
dpi::LogicalSize,
event_loop::EventLoop,
window::{Window, WindowBuilder},
},
WinitPlatform,
};
use raw_window_handle::HasRawWindowHandle;
const TITLE: &str = "Hello, imgui-rs!";
fn main() {
// Common setup for creating a winit window and imgui context, not specifc
// to this renderer at all except that glutin is used to create the window
// since it will give us access to a GL context
let (event_loop, window, surface, context) = create_window();
let (mut winit_platform, mut imgui_context) = imgui_init(&window);
// OpenGL context from glow
let gl = glow_context(&context);
// OpenGL renderer from this crate
let mut ig_renderer = imgui_glow_renderer::AutoRenderer::initialize(gl, &mut imgui_context)
.expect("failed to create renderer");
let mut last_frame = Instant::now();
// Standard winit event loop
event_loop
.run(move |event, window_target| {
match event {
winit::event::Event::NewEvents(_) => {
let now = Instant::now();
imgui_context
.io_mut()
.update_delta_time(now.duration_since(last_frame));
last_frame = now;
}
winit::event::Event::AboutToWait => {
winit_platform
.prepare_frame(imgui_context.io_mut(), &window)
.unwrap();
window.request_redraw();
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::RedrawRequested,
..
} => {
// The renderer assumes you'll be clearing the buffer yourself
unsafe { ig_renderer.gl_context().clear(glow::COLOR_BUFFER_BIT) };
let ui = imgui_context.frame();
ui.show_demo_window(&mut true);
winit_platform.prepare_render(ui, &window);
let draw_data = imgui_context.render();
// This is the only extra render step to add
ig_renderer
.render(draw_data)
.expect("error rendering imgui");
surface
.swap_buffers(&context)
.expect("Failed to swap buffers");
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::CloseRequested,
..
} => {
window_target.exit();
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::Resized(new_size),
..
} => {
if new_size.width > 0 && new_size.height > 0 {
surface.resize(
&context,
NonZeroU32::new(new_size.width).unwrap(),
NonZeroU32::new(new_size.height).unwrap(),
);
}
winit_platform.handle_event(imgui_context.io_mut(), &window, &event);
}
event => {
winit_platform.handle_event(imgui_context.io_mut(), &window, &event);
}
}
})
.expect("EventLoop error");
}
fn create_window() -> (
EventLoop<()>,
Window,
Surface<WindowSurface>,
PossiblyCurrentContext,
) {
let event_loop = EventLoop::new().unwrap();
let window_builder = WindowBuilder::new()
.with_title(TITLE)
.with_inner_size(LogicalSize::new(1024, 768));
let (window, cfg) = glutin_winit::DisplayBuilder::new()
.with_window_builder(Some(window_builder))
.build(&event_loop, ConfigTemplateBuilder::new(), |mut configs| {
configs.next().unwrap()
})
.expect("Failed to create OpenGL window");
let window = window.unwrap();
let context_attribs = ContextAttributesBuilder::new().build(Some(window.raw_window_handle()));
let context = unsafe {
cfg.display()
.create_context(&cfg, &context_attribs)
.expect("Failed to create OpenGL context")
};
let surface_attribs = SurfaceAttributesBuilder::<WindowSurface>::new()
.with_srgb(Some(true))
.build(
window.raw_window_handle(),
NonZeroU32::new(1024).unwrap(),
NonZeroU32::new(768).unwrap(),
);
let surface = unsafe {
cfg.display()
.create_window_surface(&cfg, &surface_attribs)
.expect("Failed to create OpenGL surface")
};
let context = context
.make_current(&surface)
.expect("Failed to make OpenGL context current");
(event_loop, window, surface, context)
}
fn glow_context(context: &PossiblyCurrentContext) -> glow::Context {
unsafe {
glow::Context::from_loader_function_cstr(|s| context.display().get_proc_address(s).cast())
}
}
fn imgui_init(window: &Window) -> (WinitPlatform, imgui::Context) {
let mut imgui_context = imgui::Context::create();
imgui_context.set_ini_filename(None);
let mut winit_platform = WinitPlatform::init(&mut imgui_context);
winit_platform.attach_window(
imgui_context.io_mut(),
window,
imgui_winit_support::HiDpiMode::Rounded,
);
imgui_context
.fonts()
.add_font(&[imgui::FontSource::DefaultFontData { config: None }]);
imgui_context.io_mut().font_global_scale = (1.0 / winit_platform.hidpi_factor()) as f32;
(winit_platform, imgui_context)
}

89
imgui-glow-renderer/examples/glow_02_triangle.rs
View File

@ -1,89 +0,0 @@
//! A basic example showing imgui rendering on top of a simple custom scene.
use std::{num::NonZeroU32, time::Instant};
mod utils;
use glutin::surface::GlSurface;
use utils::Triangler;
fn main() {
let (event_loop, window, surface, context) = utils::create_window("Hello, triangle!", None);
let (mut winit_platform, mut imgui_context) = utils::imgui_init(&window);
let gl = utils::glow_context(&context);
let mut ig_renderer = imgui_glow_renderer::AutoRenderer::initialize(gl, &mut imgui_context)
.expect("failed to create renderer");
let tri_renderer = Triangler::new(ig_renderer.gl_context(), "#version 330");
let mut last_frame = Instant::now();
event_loop
.run(move |event, window_target| {
match event {
winit::event::Event::NewEvents(_) => {
let now = Instant::now();
imgui_context
.io_mut()
.update_delta_time(now.duration_since(last_frame));
last_frame = now;
}
winit::event::Event::AboutToWait => {
winit_platform
.prepare_frame(imgui_context.io_mut(), &window)
.unwrap();
window.request_redraw();
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::RedrawRequested,
..
} => {
// Render your custom scene, note we need to borrow the OpenGL
// context from the `AutoRenderer`, which takes ownership of it.
tri_renderer.render(ig_renderer.gl_context());
let ui = imgui_context.frame();
ui.show_demo_window(&mut true);
winit_platform.prepare_render(ui, &window);
let draw_data = imgui_context.render();
// Render imgui on top of it
ig_renderer
.render(draw_data)
.expect("error rendering imgui");
surface
.swap_buffers(&context)
.expect("Failed to swap buffers");
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::CloseRequested,
..
} => {
window_target.exit();
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::Resized(new_size),
..
} => {
if new_size.width > 0 && new_size.height > 0 {
surface.resize(
&context,
NonZeroU32::new(new_size.width).unwrap(),
NonZeroU32::new(new_size.height).unwrap(),
);
}
winit_platform.handle_event(imgui_context.io_mut(), &window, &event);
}
winit::event::Event::LoopExiting => {
let gl = ig_renderer.gl_context();
tri_renderer.destroy(gl);
}
event => {
winit_platform.handle_event(imgui_context.io_mut(), &window, &event);
}
}
})
.expect("EventLoop error");
}

108
imgui-glow-renderer/examples/glow_03_triangle_gles.rs
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@ -1,108 +0,0 @@
//! A basic example showing imgui rendering on top of a simple custom scene
//! using OpenGL ES, rather than full-fat OpenGL.
//!
//! Note this example uses `Renderer` rather than `AutoRenderer` and
//! therefore requries more lifetime-management of the OpenGL context.
use std::{num::NonZeroU32, time::Instant};
mod utils;
use glutin::{
context::{ContextApi, Version},
surface::GlSurface,
};
use utils::Triangler;
fn main() {
let (event_loop, window, surface, context) = utils::create_window(
"Hello, triangle! (GLES 3.0)",
Some(ContextApi::Gles(Some(Version::new(3, 0)))),
);
let (mut winit_platform, mut imgui_context) = utils::imgui_init(&window);
let gl = utils::glow_context(&context);
// When using `Renderer`, we need to create a texture map
let mut texture_map = imgui_glow_renderer::SimpleTextureMap::default();
// When using `Renderer`, we specify whether or not to output sRGB colors.
// Since we're drawing to screen and using OpenGL ES (which doesn't support
// `GL_FRAMEBUFFER_SRGB`) then we do need to convert to sRGB in the shader.
let mut ig_renderer =
imgui_glow_renderer::Renderer::initialize(&gl, &mut imgui_context, &mut texture_map, true)
.expect("failed to create renderer");
// Note the shader header now needs a precision specifier
let tri_renderer = Triangler::new(&gl, "#version 300 es\nprecision mediump float;");
let mut last_frame = Instant::now();
event_loop
.run(move |event, window_target| {
match event {
winit::event::Event::NewEvents(_) => {
let now = Instant::now();
imgui_context
.io_mut()
.update_delta_time(now.duration_since(last_frame));
last_frame = now;
}
winit::event::Event::AboutToWait => {
winit_platform
.prepare_frame(imgui_context.io_mut(), &window)
.unwrap();
window.request_redraw();
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::RedrawRequested,
..
} => {
// Draw custom scene
tri_renderer.render(&gl);
let ui = imgui_context.frame();
ui.show_demo_window(&mut true);
winit_platform.prepare_render(ui, &window);
let draw_data = imgui_context.render();
// Render imgui on top
ig_renderer
.render(&gl, &texture_map, draw_data)
.expect("error rendering imgui");
surface
.swap_buffers(&context)
.expect("Failed to swap buffers");
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::CloseRequested,
..
} => {
window_target.exit();
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::Resized(new_size),
..
} => {
if new_size.width > 0 && new_size.height > 0 {
surface.resize(
&context,
NonZeroU32::new(new_size.width).unwrap(),
NonZeroU32::new(new_size.height).unwrap(),
);
}
winit_platform.handle_event(imgui_context.io_mut(), &window, &event);
}
winit::event::Event::LoopExiting => {
tri_renderer.destroy(&gl);
// Note, to be good citizens we should manually call destroy
// when the renderer does not own the GL context
ig_renderer.destroy(&gl);
}
event => {
winit_platform.handle_event(imgui_context.io_mut(), &window, &event);
}
}
})
.expect("EventLoop error");
}

320
imgui-glow-renderer/examples/glow_04_custom_textures.rs
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@ -1,320 +0,0 @@
//! Example showing the same functionality as
//! `imgui-examples/examples/custom_textures.rs`
//!
//! Not that the texture uses the internal format `glow::SRGB`, so that
//! OpenGL automatically converts colors to linear space before the shaders.
//! The renderer assumes you set this internal format correctly like this.
use std::{io::Cursor, num::NonZeroU32, time::Instant};
use glow::HasContext;
use glutin::surface::GlSurface;
use image::{jpeg::JpegDecoder, ImageDecoder};
use imgui::Condition;
use imgui_glow_renderer::Renderer;
use winit::event_loop::ControlFlow;
#[allow(dead_code)]
mod utils;
const LENNA_JPEG: &[u8] = include_bytes!("../../resources/Lenna.jpg");
fn main() {
let (event_loop, window, surface, context) = utils::create_window("Custom textures", None);
let (mut winit_platform, mut imgui_context) = utils::imgui_init(&window);
let gl = utils::glow_context(&context);
// This time, we tell OpenGL this is an sRGB framebuffer and OpenGL will
// do the conversion to sSGB space for us after the fragment shader.
unsafe { gl.enable(glow::FRAMEBUFFER_SRGB) };
let mut textures = imgui::Textures::<glow::Texture>::default();
// Note that `output_srgb` is `false`. This is because we set
// `glow::FRAMEBUFFER_SRGB` so we don't have to manually do the conversion
// in the shader.
let mut ig_renderer = Renderer::initialize(&gl, &mut imgui_context, &mut textures, false)
.expect("failed to create renderer");
let textures_ui = TexturesUi::new(&gl, &mut textures);
let mut last_frame = Instant::now();
event_loop
.run(move |event, window_target| {
// Note we can potentially make the loop more efficient by
// changing the `Poll` (default) value to `ControlFlow::Wait`
// but be careful to test on all target platforms!
window_target.set_control_flow(ControlFlow::Poll);
match event {
winit::event::Event::NewEvents(_) => {
let now = Instant::now();
imgui_context
.io_mut()
.update_delta_time(now.duration_since(last_frame));
last_frame = now;
}
winit::event::Event::AboutToWait => {
winit_platform
.prepare_frame(imgui_context.io_mut(), &window)
.unwrap();
window.request_redraw();
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::RedrawRequested,
..
} => {
unsafe { gl.clear(glow::COLOR_BUFFER_BIT) };
let ui = imgui_context.frame();
textures_ui.show(ui);
winit_platform.prepare_render(ui, &window);
let draw_data = imgui_context.render();
ig_renderer
.render(&gl, &textures, draw_data)
.expect("error rendering imgui");
surface
.swap_buffers(&context)
.expect("Failed to swap buffers");
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::Resized(new_size),
..
} => {
if new_size.width > 0 && new_size.height > 0 {
surface.resize(
&context,
NonZeroU32::new(new_size.width).unwrap(),
NonZeroU32::new(new_size.height).unwrap(),
);
}
winit_platform.handle_event(imgui_context.io_mut(), &window, &event);
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::CloseRequested,
..
} => {
window_target.exit();
}
winit::event::Event::LoopExiting => {
ig_renderer.destroy(&gl);
}
event => {
winit_platform.handle_event(imgui_context.io_mut(), &window, &event);
}
}
})
.expect("EventLoop error");
}
struct TexturesUi {
generated_texture: imgui::TextureId,
lenna: Lenna,
}
impl TexturesUi {
fn new(gl: &glow::Context, textures: &mut imgui::Textures<glow::Texture>) -> Self {
Self {
generated_texture: Self::generate(gl, textures),
lenna: Lenna::load(gl, textures),
}
}
/// Generate dummy texture
fn generate(
gl: &glow::Context,
textures: &mut imgui::Textures<glow::Texture>,
) -> imgui::TextureId {
const WIDTH: usize = 100;
const HEIGHT: usize = 100;
let mut data = Vec::with_capacity(WIDTH * HEIGHT * 3);
for i in 0..WIDTH {
for j in 0..HEIGHT {
// Insert RGB values
data.push(i as u8);
data.push(j as u8);
data.push((i + j) as u8);
}
}
let gl_texture = unsafe { gl.create_texture() }.expect("unable to create GL texture");
unsafe {
gl.bind_texture(glow::TEXTURE_2D, Some(gl_texture));
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.tex_image_2d(
glow::TEXTURE_2D,
0,
glow::RGB as _, // When generating a texture like this, you're probably working in linear color space
WIDTH as _,
HEIGHT as _,
0,
glow::RGB,
glow::UNSIGNED_BYTE,
Some(&data),
)
}
textures.insert(gl_texture)
}
fn show(&self, ui: &imgui::Ui) {
ui.window("Hello textures")
.size([400.0, 400.0], Condition::FirstUseEver)
.build(|| {
ui.text("Hello textures!");
ui.text("Some generated texture");
imgui::Image::new(self.generated_texture, [100.0, 100.0]).build(ui);
ui.text("Say hello to Lenna.jpg");
self.lenna.show(ui);
// Example of using custom textures on a button
ui.text("The Lenna buttons");
{
ui.invisible_button("Boring Button", [100.0, 100.0]);
// See also `imgui::Ui::style_color`
let tint_none = [1.0, 1.0, 1.0, 1.0];
let tint_green = [0.5, 1.0, 0.5, 1.0];
let tint_red = [1.0, 0.5, 0.5, 1.0];
let tint = match (
ui.is_item_hovered(),
ui.is_mouse_down(imgui::MouseButton::Left),
) {
(false, _) => tint_none,
(true, false) => tint_green,
(true, true) => tint_red,
};
let draw_list = ui.get_window_draw_list();
draw_list
.add_image(
self.lenna.texture_id,
ui.item_rect_min(),
ui.item_rect_max(),
)
.col(tint)
.build();
}
{
ui.same_line();
// Button using quad positioned image
ui.invisible_button("Exciting Button", [100.0, 100.0]);
// Button bounds
let min = ui.item_rect_min();
let max = ui.item_rect_max();
// get corner coordinates
let tl = [
min[0],
min[1] + (ui.frame_count() as f32 / 10.0).cos() * 10.0,
];
let tr = [
max[0],
min[1] + (ui.frame_count() as f32 / 10.0).sin() * 10.0,
];
let bl = [min[0], max[1]];
let br = max;
let draw_list = ui.get_window_draw_list();
draw_list
.add_image_quad(self.lenna.texture_id, tl, tr, br, bl)
.build();
}
// Rounded image
{
ui.same_line();
ui.invisible_button("Smooth Button", [100.0, 100.0]);
let draw_list = ui.get_window_draw_list();
draw_list
.add_image_rounded(
self.lenna.texture_id,
ui.item_rect_min(),
ui.item_rect_max(),
16.0,
)
// Tint brighter for visiblity of corners
.col([2.0, 0.5, 0.5, 1.0])
// Rounding on each corner can be changed separately
.round_top_left(ui.frame_count() / 60 % 4 == 0)
.round_top_right((ui.frame_count() + 1) / 60 % 4 == 1)
.round_bot_right((ui.frame_count() + 3) / 60 % 4 == 2)
.round_bot_left((ui.frame_count() + 2) / 60 % 4 == 3)
.build();
}
});
}
}
struct Lenna {
texture_id: imgui::TextureId,
size: [f32; 2],
}
impl Lenna {
fn load(gl: &glow::Context, textures: &mut imgui::Textures<glow::Texture>) -> Self {
let decoder = JpegDecoder::new(Cursor::new(LENNA_JPEG)).expect("could not create decoder");
let (width, height) = decoder.dimensions();
let lenna_image = {
let mut bytes = vec![0; decoder.total_bytes() as usize];
decoder
.read_image(&mut bytes)
.expect("unable to decode jpeg");
bytes
};
let gl_texture = unsafe { gl.create_texture() }.expect("unable to create GL texture");
unsafe {
gl.bind_texture(glow::TEXTURE_2D, Some(gl_texture));
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.tex_image_2d(
glow::TEXTURE_2D,
0,
glow::SRGB as _, // image file has sRGB encoded colors
width as _,
height as _,
0,
glow::RGB,
glow::UNSIGNED_BYTE,
Some(&lenna_image),
)
}
Self {
texture_id: textures.insert(gl_texture),
size: [width as _, height as _],
}
}
fn show(&self, ui: &imgui::Ui) {
imgui::Image::new(self.texture_id, self.size).build(ui);
}
}

179
imgui-glow-renderer/examples/glow_05_framebufferobject.rs
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@ -1,179 +0,0 @@
//! A basic example showing imgui rendering on top of a simple custom scene.
use std::{cell::RefCell, num::NonZeroU32, rc::Rc, time::Instant};
mod utils;
use glow::HasContext;
use glutin::surface::GlSurface;
use utils::Triangler;
struct UserData {
gl: Rc<glow::Context>,
fbo: glow::NativeFramebuffer,
_rbo: glow::NativeRenderbuffer,
}
const FBO_SIZE: i32 = 128;
fn main() {
let (event_loop, window, surface, context) = utils::create_window("Hello, FBO!", None);
let (mut winit_platform, mut imgui_context) = utils::imgui_init(&window);
let gl = utils::glow_context(&context);
let mut ig_renderer = imgui_glow_renderer::AutoRenderer::initialize(gl, &mut imgui_context)
.expect("failed to create renderer");
let tri_renderer = Triangler::new(ig_renderer.gl_context(), "#version 330");
let fbo;
let rbo;
unsafe {
let gl = ig_renderer.gl_context();
fbo = gl.create_framebuffer().unwrap();
rbo = gl.create_renderbuffer().unwrap();
gl.bind_framebuffer(glow::DRAW_FRAMEBUFFER, Some(fbo));
gl.bind_renderbuffer(glow::RENDERBUFFER, Some(rbo));
gl.renderbuffer_storage(glow::RENDERBUFFER, glow::RGBA8, FBO_SIZE, FBO_SIZE);
gl.framebuffer_renderbuffer(
glow::DRAW_FRAMEBUFFER,
glow::COLOR_ATTACHMENT0,
glow::RENDERBUFFER,
Some(rbo),
);
gl.bind_renderbuffer(glow::RENDERBUFFER, None);
gl.viewport(0, 0, FBO_SIZE, FBO_SIZE);
tri_renderer.render(gl);
gl.bind_framebuffer(glow::DRAW_FRAMEBUFFER, None);
}
let data = Rc::new(RefCell::new(UserData {
gl: Rc::clone(ig_renderer.gl_context()),
fbo,
_rbo: rbo,
}));
let mut last_frame = Instant::now();
event_loop
.run(move |event, window_target| {
match event {
winit::event::Event::NewEvents(_) => {
let now = Instant::now();
imgui_context
.io_mut()
.update_delta_time(now.duration_since(last_frame));
last_frame = now;
}
winit::event::Event::AboutToWait => {
winit_platform
.prepare_frame(imgui_context.io_mut(), &window)
.unwrap();
window.request_redraw();
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::RedrawRequested,
..
} => {
// Render your custom scene, note we need to borrow the OpenGL
// context from the `AutoRenderer`, which takes ownership of it.
unsafe {
ig_renderer.gl_context().clear(glow::COLOR_BUFFER_BIT);
}
let ui = imgui_context.frame();
ui.show_demo_window(&mut true);
ui.window("FBO").resizable(false).build(|| {
let pos = ui.cursor_screen_pos();
ui.set_cursor_screen_pos([
pos[0] + FBO_SIZE as f32,
pos[1] + FBO_SIZE as f32,
]);
let draws = ui.get_window_draw_list();
let scale = ui.io().display_framebuffer_scale;
let dsp_size = ui.io().display_size;
draws
.add_callback({
let data = Rc::clone(&data);
move || {
let data = data.borrow();
let gl = &*data.gl;
unsafe {
let x = pos[0] * scale[0];
let y = (dsp_size[1] - pos[1]) * scale[1];
let dst_x0 = x as i32;
let dst_y0 = (y - FBO_SIZE as f32 * scale[1]) as i32;
let dst_x1 = (x + FBO_SIZE as f32 * scale[0]) as i32;
let dst_y1 = y as i32;
gl.scissor(
dst_x0,
dst_y0,
dst_x1 - dst_x0,
dst_y1 - dst_y0,
);
gl.enable(glow::SCISSOR_TEST);
gl.bind_framebuffer(glow::READ_FRAMEBUFFER, Some(data.fbo));
gl.blit_framebuffer(
0,
0,
FBO_SIZE,
FBO_SIZE,
dst_x0,
dst_y0,
dst_x1,
dst_y1,
glow::COLOR_BUFFER_BIT,
glow::NEAREST,
);
gl.bind_framebuffer(glow::READ_FRAMEBUFFER, None);
}
}
})
.build();
});
winit_platform.prepare_render(ui, &window);
let draw_data = imgui_context.render();
// Render imgui on top of it
ig_renderer
.render(draw_data)
.expect("error rendering imgui");
surface
.swap_buffers(&context)
.expect("Failed to swap buffers");
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::CloseRequested,
..
} => {
window_target.exit();
}
winit::event::Event::WindowEvent {
event: winit::event::WindowEvent::Resized(new_size),
..
} => {
if new_size.width > 0 && new_size.height > 0 {
surface.resize(
&context,
NonZeroU32::new(new_size.width).unwrap(),
NonZeroU32::new(new_size.height).unwrap(),
);
}
winit_platform.handle_event(imgui_context.io_mut(), &window, &event);
}
winit::event::Event::LoopExiting => {
let gl = ig_renderer.gl_context();
tri_renderer.destroy(gl);
}
event => {
winit_platform.handle_event(imgui_context.io_mut(), &window, &event);
}
}
})
.expect("EventLoop error");
}

215
imgui-glow-renderer/examples/utils/mod.rs
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@ -1,215 +0,0 @@
use std::num::NonZeroU32;
use glow::HasContext;
use glutin::{
config::ConfigTemplateBuilder,
context::{ContextApi, ContextAttributesBuilder, NotCurrentGlContext, PossiblyCurrentContext},
display::{GetGlDisplay, GlDisplay},
surface::{GlSurface, Surface, SurfaceAttributesBuilder, SwapInterval, WindowSurface},
};
use imgui_winit_support::WinitPlatform;
use raw_window_handle::HasRawWindowHandle;
use winit::{
dpi::LogicalSize,
event_loop::EventLoop,
window::{Window, WindowBuilder},
};
pub fn create_window(
title: &str,
context_api: Option<ContextApi>,
) -> (
EventLoop<()>,
Window,
Surface<WindowSurface>,
PossiblyCurrentContext,
) {
let event_loop = EventLoop::new().unwrap();
let window_builder = WindowBuilder::new()
.with_title(title)
.with_inner_size(LogicalSize::new(1024, 768));
let (window, cfg) = glutin_winit::DisplayBuilder::new()
.with_window_builder(Some(window_builder))
.build(&event_loop, ConfigTemplateBuilder::new(), |mut configs| {
configs.next().unwrap()
})
.expect("Failed to create OpenGL window");
let window = window.unwrap();
let mut context_attribs = ContextAttributesBuilder::new();
if let Some(context_api) = context_api {
context_attribs = context_attribs.with_context_api(context_api);
}
let context_attribs = context_attribs.build(Some(window.raw_window_handle()));
let context = unsafe {
cfg.display()
.create_context(&cfg, &context_attribs)
.expect("Failed to create OpenGL context")
};
let surface_attribs = SurfaceAttributesBuilder::<WindowSurface>::new()
.with_srgb(Some(true))
.build(
window.raw_window_handle(),
NonZeroU32::new(1024).unwrap(),
NonZeroU32::new(768).unwrap(),
);
let surface = unsafe {
cfg.display()
.create_window_surface(&cfg, &surface_attribs)
.expect("Failed to create OpenGL surface")
};
let context = context
.make_current(&surface)
.expect("Failed to make OpenGL context current");
surface
.set_swap_interval(&context, SwapInterval::Wait(NonZeroU32::new(1).unwrap()))
.expect("Failed to set swap interval");
(event_loop, window, surface, context)
}
pub fn glow_context(context: &PossiblyCurrentContext) -> glow::Context {
unsafe {
glow::Context::from_loader_function_cstr(|s| context.display().get_proc_address(s).cast())
}
}
pub fn imgui_init(window: &Window) -> (WinitPlatform, imgui::Context) {
let mut imgui_context = imgui::Context::create();
imgui_context.set_ini_filename(None);
let mut winit_platform = WinitPlatform::init(&mut imgui_context);
winit_platform.attach_window(
imgui_context.io_mut(),
window,
imgui_winit_support::HiDpiMode::Rounded,
);
imgui_context
.fonts()
.add_font(&[imgui::FontSource::DefaultFontData { config: None }]);
imgui_context.io_mut().font_global_scale = (1.0 / winit_platform.hidpi_factor()) as f32;
(winit_platform, imgui_context)
}
pub struct Triangler {
pub program: <glow::Context as HasContext>::Program,
pub vertex_array: <glow::Context as HasContext>::VertexArray,
}
impl Triangler {
pub fn new(gl: &glow::Context, shader_header: &str) -> Self {
const VERTEX_SHADER_SOURCE: &str = 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;
out vec4 color;
vec4 srgb_to_linear(vec4 srgb_color) {
// Calcuation as documented by OpenGL
vec3 srgb = srgb_color.rgb;
vec3 selector = ceil(srgb - 0.04045);
vec3 less_than_branch = srgb / 12.92;
vec3 greater_than_branch = pow((srgb + 0.055) / 1.055, vec3(2.4));
return vec4(
mix(less_than_branch, greater_than_branch, selector),
srgb_color.a
);
}
void main() {
vert = verts[gl_VertexID];
color = srgb_to_linear(vec4(vert, 0.5, 1.0));
gl_Position = vec4(vert - 0.5, 0.0, 1.0);
}
"#;
const FRAGMENT_SHADER_SOURCE: &str = r#"
in vec2 vert;
in vec4 color;
out vec4 frag_color;
vec4 linear_to_srgb(vec4 linear_color) {
vec3 linear = linear_color.rgb;
vec3 selector = ceil(linear - 0.0031308);
vec3 less_than_branch = linear * 12.92;
vec3 greater_than_branch = pow(linear, vec3(1.0/2.4)) * 1.055 - 0.055;
return vec4(
mix(less_than_branch, greater_than_branch, selector),
linear_color.a
);
}
void main() {
frag_color = linear_to_srgb(color);
}
"#;
let mut shaders = [
(glow::VERTEX_SHADER, VERTEX_SHADER_SOURCE, None),
(glow::FRAGMENT_SHADER, FRAGMENT_SHADER_SOURCE, None),
];
unsafe {
let vertex_array = gl
.create_vertex_array()
.expect("Cannot create vertex array");
let program = gl.create_program().expect("Cannot create program");
for (kind, source, handle) in &mut shaders {
let shader = gl.create_shader(*kind).expect("Cannot create shader");
gl.shader_source(shader, &format!("{}\n{}", shader_header, *source));
gl.compile_shader(shader);
if !gl.get_shader_compile_status(shader) {
panic!("{}", gl.get_shader_info_log(shader));
}
gl.attach_shader(program, shader);
*handle = Some(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.unwrap());
gl.delete_shader(shader.unwrap());
}
Self {
program,
vertex_array,
}
}
}
pub fn render(&self, gl: &glow::Context) {
unsafe {
gl.clear_color(0.05, 0.05, 0.1, 1.0);
gl.clear(glow::COLOR_BUFFER_BIT);
gl.use_program(Some(self.program));
gl.bind_vertex_array(Some(self.vertex_array));
gl.draw_arrays(glow::TRIANGLES, 0, 3);
}
}
pub fn destroy(&self, gl: &glow::Context) {
unsafe {
gl.delete_program(self.program);
gl.delete_vertex_array(self.vertex_array);
}
}
}

1164
imgui-glow-renderer/src/lib.rs
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File diff suppressed because it is too large Load Diff

188
imgui-glow-renderer/src/versions.rs
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@ -1,188 +0,0 @@
#![allow(clippy::must_use_candidate)]
#[derive(PartialEq, Clone, Copy, Eq)]
pub struct GlVersion {
pub major: u16,
pub minor: u16,
pub is_gles: bool,
}
impl GlVersion {
pub const fn gl(major: u16, minor: u16) -> Self {
Self {
major,
minor,
is_gles: false,
}
}
pub const fn gles(major: u16, minor: u16) -> Self {
Self {
major,
minor,
is_gles: true,
}
}
pub fn read<G: glow::HasContext>(gl: &G) -> Self {
Self::parse(&unsafe { gl.get_parameter_string(glow::VERSION) })
}
/// Parse the OpenGL version from the version string queried from the driver
/// via the `GL_VERSION` enum.
///
/// Version strings are documented to be in the form
/// `<major>.<minor>[.<release>][ <vendor specific information>]`
/// for full-fat OpenGL, and
/// `OpenGL ES <major>.<minor>[.<release>][ <vendor specific information>]`
/// for OpenGL ES.
///
/// Examples based on strings found in the wild:
/// ```rust
/// # use imgui_glow_renderer::versions::GlVersion;
/// let version = GlVersion::parse("4.6.0 NVIDIA 465.27");
/// assert!(!version.is_gles);
/// assert_eq!(version.major, 4);
/// assert_eq!(version.minor, 6);
/// let version = GlVersion::parse("OpenGL ES 3.2 NVIDIA 465.27");
/// assert!(version.is_gles);
/// assert_eq!(version.major, 3);
/// assert_eq!(version.minor, 2);
/// ```
pub fn parse(gl_version_string: &str) -> Self {
let (version_string, is_gles) = gl_version_string
.strip_prefix("OpenGL ES ")
.map_or_else(|| (gl_version_string, false), |version| (version, true));
let mut parts = version_string.split(|c: char| !c.is_numeric());
let major = parts.next().unwrap_or("0").parse().unwrap_or(0);
let minor = parts.next().unwrap_or("0").parse().unwrap_or(0);
Self {
major,
minor,
is_gles,
}
}
/// Debug messages are provided by `glDebugMessageInsert`, which is only
/// present in OpenGL >= 4.3
#[cfg(feature = "debug_message_insert_support")]
pub fn debug_message_insert_support(self) -> bool {
self >= Self::gl(4, 3)
}
/// Vertex array binding is provided by `glBindVertexArray`, which is
/// not present in OpenGL (ES) <3.0
#[cfg(feature = "bind_vertex_array_support")]
pub fn bind_vertex_array_support(self) -> bool {
self.major >= 3
}
/// Vertex offset support is provided by `glDrawElementsBaseVertex`, which is
/// only present from OpenGL 3.2 and above.
#[cfg(feature = "vertex_offset_support")]
pub fn vertex_offset_support(self) -> bool {
self >= Self::gl(3, 2)
}
/// Vertex arrays (e.g. `glBindVertexArray`) are supported from OpenGL 3.0
/// and OpenGL ES 3.0
#[cfg(feature = "vertex_array_support")]
pub fn vertex_array_support(self) -> bool {
self >= Self::gl(3, 0) || self >= Self::gles(3, 0)
}
/// Separate binding of sampler (`glBindSampler`) is supported from OpenGL
/// 3.2 or ES 3.0
#[cfg(feature = "bind_sampler_support")]
pub fn bind_sampler_support(self) -> bool {
self >= GlVersion::gl(3, 2) || self >= GlVersion::gles(3, 0)
}
/// Setting the clip origin (`GL_CLIP_ORIGIN`) is suppoted from OpenGL 4.5
#[cfg(feature = "clip_origin_support")]
pub fn clip_origin_support(self) -> bool {
self >= GlVersion::gl(4, 5)
}
#[cfg(feature = "polygon_mode_support")]
pub fn polygon_mode_support(self) -> bool {
!self.is_gles
}
#[cfg(feature = "primitive_restart_support")]
pub fn primitive_restart_support(self) -> bool {
self >= GlVersion::gl(3, 1)
}
}
impl PartialOrd for GlVersion {
fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
if self.is_gles == other.is_gles {
Some(
self.major
.cmp(&other.major)
.then(self.minor.cmp(&other.minor)),
)
} else {
None
}
}
}
pub struct GlslVersion {
pub major: u16,
pub minor: u16,
pub is_gles: bool,
}
impl GlslVersion {
pub fn read<G: glow::HasContext>(gl: &G) -> Self {
Self::parse(&unsafe { gl.get_parameter_string(glow::SHADING_LANGUAGE_VERSION) })
}
/// Parse the OpenGL version from the version string queried from the driver
/// via the `GL_SHADING_LANGUAGE_VERSION` enum.
///
/// Version strings are documented to be in the form
/// `<major>.<minor>[.<release>][ <vendor specific information>]`
/// for full-fat OpenGL, and
/// `OpenGL ES GLSL ES <major>.<minor>[.<release>][ <vendor specific information>]`
/// for OpenGL ES (however, strings omitting that prefix have been observed).
///
/// Examples based on strings found in the wild:
/// ```rust
/// # use imgui_glow_renderer::versions::GlslVersion;
/// let version = GlslVersion::parse("4.60 NVIDIA");
/// assert!(!version.is_gles);
/// assert_eq!(version.major, 4);
/// assert_eq!(version.minor, 6);
/// let version = GlslVersion::parse("OpenGL ES GLSL ES 3.20");
/// assert!(version.is_gles);
/// assert_eq!(version.major, 3);
/// assert_eq!(version.minor, 2);
/// ```
pub fn parse(gl_shading_language_version: &str) -> Self {
let (version_string, is_gles) = gl_shading_language_version
.strip_prefix("OpenGL ES GLSL ES ")
.map_or_else(
|| (gl_shading_language_version, false),
|version| (version, true),
);
let mut parts = version_string.split(|c: char| !c.is_numeric());
let major = parts.next().unwrap_or("0").parse().unwrap_or(0);
let minor = parts.next().unwrap_or("0").parse().unwrap_or(0);
// The minor version has been observed specified as both a single- or
// double-digit version
let minor = if minor >= 10 { minor / 10 } else { minor };
Self {
major,
minor,
is_gles,
}
}
}

20
imgui-sdl2-support/Cargo.toml
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@ -1,20 +0,0 @@
[package]
name = "imgui-sdl2-support"
version = "0.12.0"
edition = "2021"
authors = ["The imgui-rs Developers"]
description = "sdl2 support code for the imgui crate"
homepage = "https://github.com/imgui-rs/imgui-rs"
repository = "https://github.com/imgui-rs/imgui-rs"
documentation = "https://docs.rs/imgui-sdl2-support"
license = "MIT OR Apache-2.0"
categories = ["gui"]
[dependencies]
imgui = { version = "0.12.0", path = "../imgui" }
sdl2 = "0.36"
[dev-dependencies]
glow = "0.13.1"
imgui-glow-renderer = { version = "0.12.0", path = "../imgui-glow-renderer" }
sdl2 = { version = "0.36", features = ["bundled", "static-link"] }

202
imgui-sdl2-support/LICENSE-APACHE
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@ -1,202 +0,0 @@
Apache License
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TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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6. Trademarks. This License does not grant permission to use the trade
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END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
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Copyright 2021 the imgui-rs developers
Licensed under the Apache License, Version 2.0 (the "License");
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See the License for the specific language governing permissions and
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19
imgui-sdl2-support/LICENSE-MIT
View File

@ -1,19 +0,0 @@
Copyright (c) 2021 The imgui-rs Developers
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

92
imgui-sdl2-support/examples/sdl2_01_basic.rs
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@ -1,92 +0,0 @@
use glow::HasContext;
use imgui::Context;
use imgui_glow_renderer::AutoRenderer;
use imgui_sdl2_support::SdlPlatform;
use sdl2::{
event::Event,
video::{GLProfile, Window},
};
// Create a new glow context.
fn glow_context(window: &Window) -> glow::Context {
unsafe {
glow::Context::from_loader_function(|s| window.subsystem().gl_get_proc_address(s) as _)
}
}
fn main() {
/* initialize SDL and its video subsystem */
let sdl = sdl2::init().unwrap();
let video_subsystem = sdl.video().unwrap();
/* hint SDL to initialize an OpenGL 3.3 core profile context */
let gl_attr = video_subsystem.gl_attr();
gl_attr.set_context_version(3, 3);
gl_attr.set_context_profile(GLProfile::Core);
/* create a new window, be sure to call opengl method on the builder when using glow! */
let window = video_subsystem
.window("Hello imgui-rs!", 1280, 720)
.allow_highdpi()
.opengl()
.position_centered()
.resizable()
.build()
.unwrap();
/* create a new OpenGL context and make it current */
let gl_context = window.gl_create_context().unwrap();
window.gl_make_current(&gl_context).unwrap();
/* enable vsync to cap framerate */
window.subsystem().gl_set_swap_interval(1).unwrap();
/* create new glow and imgui contexts */
let gl = glow_context(&window);
/* create context */
let mut imgui = Context::create();
/* disable creation of files on disc */
imgui.set_ini_filename(None);
imgui.set_log_filename(None);
/* setup platform and renderer, and fonts to imgui */
imgui
.fonts()
.add_font(&[imgui::FontSource::DefaultFontData { config: None }]);
/* create platform and renderer */
let mut platform = SdlPlatform::init(&mut imgui);
let mut renderer = AutoRenderer::initialize(gl, &mut imgui).unwrap();
/* start main loop */
let mut event_pump = sdl.event_pump().unwrap();
'main: loop {
for event in event_pump.poll_iter() {
/* pass all events to imgui platfrom */
platform.handle_event(&mut imgui, &event);
if let Event::Quit { .. } = event {
break 'main;
}
}
/* call prepare_frame before calling imgui.new_frame() */
platform.prepare_frame(&mut imgui, &window, &event_pump);
let ui = imgui.new_frame();
/* create imgui UI here */
ui.show_demo_window(&mut true);
/* render */
let draw_data = imgui.render();
unsafe { renderer.gl_context().clear(glow::COLOR_BUFFER_BIT) };
renderer.render(draw_data).unwrap();
window.gl_swap_window();
}
}

388
imgui-sdl2-support/src/lib.rs
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@ -1,388 +0,0 @@
//! This crate provides a SDL 2 based backend platform for imgui-rs.
//!
//! A backend platform handles window/input device events and manages their
//! state.
//!
//! # Using the library
//!
//! There are three things you need to do to use this library correctly:
//!
//! 1. Initialize a `SdlPlatform` instance
//! 2. Pass events to the platform (every frame)
//! 3. Call frame preparation callback (every frame)
//!
//! For a complete example, take a look at the imgui-rs' GitHub repository.
use std::time::Instant;
use imgui::{BackendFlags, ConfigFlags, Context, Io, MouseCursor};
use sdl2::{
event::Event,
keyboard::{Mod, Scancode},
mouse::{Cursor, MouseState, SystemCursor},
video::Window,
EventPump,
};
/// Handle changes in the key states.
fn handle_key(io: &mut Io, key: &Scancode, pressed: bool) {
let igkey = match key {
Scancode::A => imgui::Key::A,
Scancode::B => imgui::Key::B,
Scancode::C => imgui::Key::C,
Scancode::D => imgui::Key::D,
Scancode::E => imgui::Key::E,
Scancode::F => imgui::Key::F,
Scancode::G => imgui::Key::G,
Scancode::H => imgui::Key::H,
Scancode::I => imgui::Key::I,
Scancode::J => imgui::Key::J,
Scancode::K => imgui::Key::K,
Scancode::L => imgui::Key::L,
Scancode::M => imgui::Key::M,
Scancode::N => imgui::Key::N,
Scancode::O => imgui::Key::O,
Scancode::P => imgui::Key::P,
Scancode::Q => imgui::Key::Q,
Scancode::R => imgui::Key::R,
Scancode::S => imgui::Key::S,
Scancode::T => imgui::Key::T,
Scancode::U => imgui::Key::U,
Scancode::V => imgui::Key::V,
Scancode::W => imgui::Key::W,
Scancode::X => imgui::Key::X,
Scancode::Y => imgui::Key::Y,
Scancode::Z => imgui::Key::Z,
Scancode::Num1 => imgui::Key::Keypad1,
Scancode::Num2 => imgui::Key::Keypad2,
Scancode::Num3 => imgui::Key::Keypad3,
Scancode::Num4 => imgui::Key::Keypad4,
Scancode::Num5 => imgui::Key::Keypad5,
Scancode::Num6 => imgui::Key::Keypad6,
Scancode::Num7 => imgui::Key::Keypad7,
Scancode::Num8 => imgui::Key::Keypad8,
Scancode::Num9 => imgui::Key::Keypad9,
Scancode::Num0 => imgui::Key::Keypad0,
Scancode::Return => imgui::Key::Enter, // TODO: Should this be treated as alias?
Scancode::Escape => imgui::Key::Escape,
Scancode::Backspace => imgui::Key::Backspace,
Scancode::Tab => imgui::Key::Tab,
Scancode::Space => imgui::Key::Space,
Scancode::Minus => imgui::Key::Minus,
Scancode::Equals => imgui::Key::Equal,
Scancode::LeftBracket => imgui::Key::LeftBracket,
Scancode::RightBracket => imgui::Key::RightBracket,
Scancode::Backslash => imgui::Key::Backslash,
Scancode::Semicolon => imgui::Key::Semicolon,
Scancode::Apostrophe => imgui::Key::Apostrophe,
Scancode::Grave => imgui::Key::GraveAccent,
Scancode::Comma => imgui::Key::Comma,
Scancode::Period => imgui::Key::Period,
Scancode::Slash => imgui::Key::Slash,
Scancode::CapsLock => imgui::Key::CapsLock,
Scancode::F1 => imgui::Key::F1,
Scancode::F2 => imgui::Key::F2,
Scancode::F3 => imgui::Key::F3,
Scancode::F4 => imgui::Key::F4,
Scancode::F5 => imgui::Key::F5,
Scancode::F6 => imgui::Key::F6,
Scancode::F7 => imgui::Key::F7,
Scancode::F8 => imgui::Key::F8,
Scancode::F9 => imgui::Key::F9,
Scancode::F10 => imgui::Key::F10,
Scancode::F11 => imgui::Key::F11,
Scancode::F12 => imgui::Key::F12,
Scancode::PrintScreen => imgui::Key::PrintScreen,
Scancode::ScrollLock => imgui::Key::ScrollLock,
Scancode::Pause => imgui::Key::Pause,
Scancode::Insert => imgui::Key::Insert,
Scancode::Home => imgui::Key::Home,
Scancode::PageUp => imgui::Key::PageUp,
Scancode::Delete => imgui::Key::Delete,
Scancode::End => imgui::Key::End,
Scancode::PageDown => imgui::Key::PageDown,
Scancode::Right => imgui::Key::RightArrow,
Scancode::Left => imgui::Key::LeftArrow,
Scancode::Down => imgui::Key::DownArrow,
Scancode::Up => imgui::Key::UpArrow,
Scancode::KpDivide => imgui::Key::KeypadDivide,
Scancode::KpMultiply => imgui::Key::KeypadMultiply,
Scancode::KpMinus => imgui::Key::KeypadSubtract,
Scancode::KpPlus => imgui::Key::KeypadAdd,
Scancode::KpEnter => imgui::Key::KeypadEnter,
Scancode::Kp1 => imgui::Key::Keypad1,
Scancode::Kp2 => imgui::Key::Keypad2,
Scancode::Kp3 => imgui::Key::Keypad3,
Scancode::Kp4 => imgui::Key::Keypad4,
Scancode::Kp5 => imgui::Key::Keypad5,
Scancode::Kp6 => imgui::Key::Keypad6,
Scancode::Kp7 => imgui::Key::Keypad7,
Scancode::Kp8 => imgui::Key::Keypad8,
Scancode::Kp9 => imgui::Key::Keypad9,
Scancode::Kp0 => imgui::Key::Keypad0,
Scancode::KpPeriod => imgui::Key::KeypadDecimal,
Scancode::Application => imgui::Key::Menu,
Scancode::KpEquals => imgui::Key::KeypadEqual,
Scancode::Menu => imgui::Key::Menu,
Scancode::LCtrl => imgui::Key::LeftCtrl,
Scancode::LShift => imgui::Key::LeftShift,
Scancode::LAlt => imgui::Key::LeftAlt,
Scancode::LGui => imgui::Key::LeftSuper,
Scancode::RCtrl => imgui::Key::RightCtrl,
Scancode::RShift => imgui::Key::RightShift,
Scancode::RAlt => imgui::Key::RightAlt,
Scancode::RGui => imgui::Key::RightSuper,
_ => {
// Ignore unknown keys
return;
}
};
io.add_key_event(igkey, pressed);
}
/// Handle changes in the key modifier states.
fn handle_key_modifier(io: &mut Io, keymod: &Mod) {
io.add_key_event(
imgui::Key::ModShift,
keymod.intersects(Mod::LSHIFTMOD | Mod::RSHIFTMOD),
);
io.add_key_event(
imgui::Key::ModCtrl,
keymod.intersects(Mod::LCTRLMOD | Mod::RCTRLMOD),
);
io.add_key_event(
imgui::Key::ModAlt,
keymod.intersects(Mod::LALTMOD | Mod::RALTMOD),
);
io.add_key_event(
imgui::Key::ModSuper,
keymod.intersects(Mod::LGUIMOD | Mod::RGUIMOD),
);
}
/// Map an imgui::MouseCursor to an equivalent sdl2::mouse::SystemCursor.
fn to_sdl_cursor(cursor: MouseCursor) -> SystemCursor {
match cursor {
MouseCursor::Arrow => SystemCursor::Arrow,
MouseCursor::TextInput => SystemCursor::IBeam,
MouseCursor::ResizeAll => SystemCursor::SizeAll,
MouseCursor::ResizeNS => SystemCursor::SizeNS,
MouseCursor::ResizeEW => SystemCursor::SizeWE,
MouseCursor::ResizeNESW => SystemCursor::SizeNESW,
MouseCursor::ResizeNWSE => SystemCursor::SizeNWSE,
MouseCursor::Hand => SystemCursor::Hand,
MouseCursor::NotAllowed => SystemCursor::No,
}
}
/// Returns `true` if the provided event is associated with the provided window.
///
/// # Example
/// ```rust,no_run
/// # let mut event_pump: sdl2::EventPump = unimplemented!();
/// # let window: sdl2::video::Window = unimplemented!();
/// # let mut imgui = imgui::Context::create();
/// # let mut platform = SdlPlatform::init(&mut imgui);
/// use imgui_sdl2_support::{SdlPlatform, filter_event};
/// // Assuming there are multiple windows, we only want to provide the events
/// // of the window where we are rendering to imgui-rs
/// for event in event_pump.poll_iter().filter(|event| filter_event(&window, event)) {
/// platform.handle_event(&mut imgui, &event);
/// }
/// ```
pub fn filter_event(window: &Window, event: &Event) -> bool {
Some(window.id()) == event.get_window_id()
}
/// SDL 2 backend platform state.
///
/// A backend platform handles window/input device events and manages their
/// state.
///
/// There are three things you need to do to use this library correctly:
///
/// 1. Initialize a `SdlPlatform` instance
/// 2. Pass events to the platform (every frame)
/// 3. Call frame preparation callback (every frame)
pub struct SdlPlatform {
cursor_instance: Option<Cursor>, /* to avoid dropping cursor instances */
last_frame: Instant,
}
impl SdlPlatform {
/// Initializes a SDL platform instance and configures imgui.
///
/// This function configures imgui-rs in the following ways:
///
/// * backend flags are updated
/// * keys are configured
/// * platform name is set
pub fn init(imgui: &mut Context) -> SdlPlatform {
let io = imgui.io_mut();
io.backend_flags.insert(BackendFlags::HAS_MOUSE_CURSORS);
io.backend_flags.insert(BackendFlags::HAS_SET_MOUSE_POS);
imgui.set_platform_name(Some(format!(
"imgui-sdl2-support {}",
env!("CARGO_PKG_VERSION")
)));
SdlPlatform {
cursor_instance: None,
last_frame: Instant::now(),
}
}
/// Handles a SDL event.
///
/// This function performs the following actions (depends on the event):
///
/// * keyboard state is updated
/// * mouse state is updated
pub fn handle_event(&mut self, context: &mut Context, event: &Event) -> bool {
let io = context.io_mut();
match *event {
Event::MouseWheel { x, y, .. } => {
io.add_mouse_wheel_event([x as f32, y as f32]);
true
}
Event::MouseButtonDown { mouse_btn, .. } => {
self.handle_mouse_button(io, &mouse_btn, true);
true
}
Event::MouseButtonUp { mouse_btn, .. } => {
self.handle_mouse_button(io, &mouse_btn, false);
true
}
Event::TextInput { ref text, .. } => {
text.chars().for_each(|c| io.add_input_character(c));
true
}
Event::KeyDown {
scancode: Some(key),
keymod,
..
} => {
handle_key_modifier(io, &keymod);
handle_key(io, &key, true);
true
}
Event::KeyUp {
scancode: Some(key),
keymod,
..
} => {
handle_key_modifier(io, &keymod);
handle_key(io, &key, false);
true
}
_ => false,
}
}
/// Frame preparation callback.
///
/// Call this before calling the imgui-rs context `frame` function.
/// This function performs the following actions:
///
/// * display size and the framebuffer scale is set
/// * mouse cursor is repositioned (if requested by imgui-rs)
/// * current mouse cursor position is passed to imgui-rs
/// * changes mouse cursor icon (if requested by imgui-rs)
pub fn prepare_frame(
&mut self,
context: &mut Context,
window: &Window,
event_pump: &EventPump,
) {
let mouse_cursor = context.mouse_cursor();
let io = context.io_mut();
// Update delta time
let now = Instant::now();
io.update_delta_time(now.duration_since(self.last_frame));
self.last_frame = now;
let mouse_state = MouseState::new(event_pump);
let window_size = window.size();
let window_drawable_size = window.drawable_size();
// Set display size and scale here, since SDL 2 doesn't have
// any easy way to get the scale factor, and changes in said
// scale factor
io.display_size = [window_size.0 as f32, window_size.1 as f32];
io.display_framebuffer_scale = [
(window_drawable_size.0 as f32) / (window_size.0 as f32),
(window_drawable_size.1 as f32) / (window_size.1 as f32),
];
// Set mouse position if requested by imgui-rs
if io.want_set_mouse_pos {
let mouse_util = window.subsystem().sdl().mouse();
mouse_util.warp_mouse_in_window(window, io.mouse_pos[0] as i32, io.mouse_pos[1] as i32);
}
// Update mouse cursor position
io.mouse_pos = [mouse_state.x() as f32, mouse_state.y() as f32];
// Update mouse cursor icon if requested
if !io
.config_flags
.contains(ConfigFlags::NO_MOUSE_CURSOR_CHANGE)
{
let mouse_util = window.subsystem().sdl().mouse();
match mouse_cursor {
Some(mouse_cursor) if !io.mouse_draw_cursor => {
let cursor = Cursor::from_system(to_sdl_cursor(mouse_cursor)).unwrap();
cursor.set();
mouse_util.show_cursor(true);
self.cursor_instance = Some(cursor);
}
_ => {
mouse_util.show_cursor(false);
self.cursor_instance = None;
}
}
}
}
}
impl SdlPlatform {
fn handle_mouse_button(
&mut self,
io: &mut Io,
button: &sdl2::mouse::MouseButton,
pressed: bool,
) {
match button {
sdl2::mouse::MouseButton::Left => {
io.add_mouse_button_event(imgui::MouseButton::Left, pressed)
}
sdl2::mouse::MouseButton::Right => {
io.add_mouse_button_event(imgui::MouseButton::Right, pressed)
}
sdl2::mouse::MouseButton::Middle => {
io.add_mouse_button_event(imgui::MouseButton::Middle, pressed)
}
sdl2::mouse::MouseButton::X1 => {
io.add_mouse_button_event(imgui::MouseButton::Extra1, pressed)
}
sdl2::mouse::MouseButton::X2 => {
io.add_mouse_button_event(imgui::MouseButton::Extra2, pressed)
}
_ => {}
}
}
}

20
imgui-winit-glow-renderer-viewports/Cargo.toml
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@ -1,20 +0,0 @@
[package]
name = "imgui-winit-glow-renderer-viewports"
version = "0.12.0"
edition = "2021"
description = "combined platform + renderer using the docking branch viewport feature"
homepage = "https://github.com/imgui-rs/imgui-rs"
repository = "https://github.com/imgui-rs/imgui-rs"
license = "MIT OR Apache-2.0"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
imgui = { version = "0.12.0", path="../imgui", features=["docking"] }
glow = "0.13.1"
glutin = "0.31.1"
glutin-winit = "0.4.2"
raw-window-handle = "0.5.0"
winit = "0.29.3"
thiserror = "1.0.38"

170
imgui-winit-glow-renderer-viewports/examples/viewports_basic.rs
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@ -1,170 +0,0 @@
use std::{ffi::CString, num::NonZeroU32, time::Instant};
use glow::{Context, HasContext};
use glutin::{
config::ConfigTemplateBuilder,
context::{ContextAttributesBuilder, NotCurrentGlContext, PossiblyCurrentGlContext},
display::GetGlDisplay,
prelude::GlDisplay,
surface::{GlSurface, SurfaceAttributesBuilder, WindowSurface},
};
use glutin_winit::DisplayBuilder;
use imgui::ConfigFlags;
use imgui_winit_glow_renderer_viewports::Renderer;
use raw_window_handle::HasRawWindowHandle;
use winit::{
dpi::LogicalSize,
event::WindowEvent,
event_loop::{ControlFlow, EventLoop},
window::WindowBuilder,
};
fn main() {
let event_loop = EventLoop::new().expect("Failed to create EventLoop");
let window_builder = WindowBuilder::new()
.with_inner_size(LogicalSize::new(800.0, 600.0))
.with_visible(true)
.with_resizable(true)
.with_title("Viewports example");
let template_builder = ConfigTemplateBuilder::new();
let (window, gl_config) = DisplayBuilder::new()
.with_window_builder(Some(window_builder))
.build(&event_loop, template_builder, |mut configs| {
configs.next().unwrap()
})
.expect("Failed to create main window");
let window = window.unwrap();
let context_attribs = ContextAttributesBuilder::new().build(Some(window.raw_window_handle()));
let context = unsafe {
gl_config
.display()
.create_context(&gl_config, &context_attribs)
.expect("Failed to create main context")
};
let size = window.inner_size();
let surface_attribs = SurfaceAttributesBuilder::<WindowSurface>::new().build(
window.raw_window_handle(),
NonZeroU32::new(size.width).unwrap(),
NonZeroU32::new(size.height).unwrap(),
);
let surface = unsafe {
gl_config
.display()
.create_window_surface(&gl_config, &surface_attribs)
.expect("Failed to create main surface")
};
let context = context
.make_current(&surface)
.expect("Failed to make current");
let glow = unsafe {
Context::from_loader_function(|name| {
let name = CString::new(name).unwrap();
context.display().get_proc_address(&name)
})
};
let mut imgui = imgui::Context::create();
imgui
.io_mut()
.config_flags
.insert(ConfigFlags::DOCKING_ENABLE);
imgui
.io_mut()
.config_flags
.insert(ConfigFlags::VIEWPORTS_ENABLE);
imgui.set_ini_filename(None);
let mut renderer = Renderer::new(&mut imgui, &window, &glow).expect("Failed to init Renderer");
let mut last_frame = Instant::now();
event_loop
.run(move |event, window_target| {
window_target.set_control_flow(ControlFlow::Poll);
renderer.handle_event(&mut imgui, &window, &event);
match event {
winit::event::Event::NewEvents(_) => {
let now = Instant::now();
imgui.io_mut().update_delta_time(now - last_frame);
last_frame = now;
}
winit::event::Event::WindowEvent {
window_id,
event: WindowEvent::CloseRequested,
} if window_id == window.id() => {
window_target.exit();
}
winit::event::Event::WindowEvent {
window_id,
event: WindowEvent::Resized(new_size),
} if window_id == window.id() => {
surface.resize(
&context,
NonZeroU32::new(new_size.width).unwrap(),
NonZeroU32::new(new_size.height).unwrap(),
);
}
winit::event::Event::AboutToWait => {
window.request_redraw();
}
winit::event::Event::WindowEvent {
event: WindowEvent::RedrawRequested,
..
} => {
let ui = imgui.frame();
ui.dockspace_over_main_viewport();
ui.show_demo_window(&mut true);
ui.window("Style Editor").build(|| {
ui.show_default_style_editor();
});
ui.end_frame_early();
renderer.prepare_render(&mut imgui, &window);
imgui.update_platform_windows();
renderer
.update_viewports(&mut imgui, window_target, &glow)
.expect("Failed to update viewports");
let draw_data = imgui.render();
if let Err(e) = context.make_current(&surface) {
// For some reason make_current randomly throws errors on windows.
// Until the reason for this is found, we just print it out instead of panicing.
eprintln!("Failed to make current: {e}");
}
unsafe {
glow.disable(glow::SCISSOR_TEST);
glow.clear(glow::COLOR_BUFFER_BIT);
}
renderer
.render(&window, &glow, draw_data)
.expect("Failed to render main viewport");
surface
.swap_buffers(&context)
.expect("Failed to swap buffers");
renderer
.render_viewports(&glow, &mut imgui)
.expect("Failed to render viewports");
}
_ => {}
}
})
.expect("EventLoop error");
}

13
imgui-winit-glow-renderer-viewports/src/fragment_shader.glsl
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@ -1,13 +0,0 @@
#version 330
in vec2 v2f_UV;
in vec4 v2f_Color;
uniform sampler2D u_FontTexture;
layout(location = 0) out vec4 out_Color;
void main() {
vec4 tex = texture(u_FontTexture, v2f_UV);
out_Color = v2f_Color * tex;
}

1144
imgui-winit-glow-renderer-viewports/src/lib.rs
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File diff suppressed because it is too large Load Diff

16
imgui-winit-glow-renderer-viewports/src/vertex_shader.glsl
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@ -1,16 +0,0 @@
#version 330
layout(location = 0) in vec2 in_Position;
layout(location = 1) in vec2 in_UV;
layout(location = 2) in vec4 in_Color;
uniform mat4 u_Matrix;
out vec2 v2f_UV;
out vec4 v2f_Color;
void main() {
gl_Position = u_Matrix * vec4(in_Position, 0.0, 1.0);
v2f_UV = in_UV;
v2f_Color = in_Color;
}

14
imgui-winit-support/Cargo.toml
View File

@ -1,14 +0,0 @@
[package]
name = "imgui-winit-support"
version = "0.12.0"
edition = "2021"
description = "winit support code for the imgui crate"
homepage = "https://github.com/imgui-rs/imgui-rs"
repository = "https://github.com/imgui-rs/imgui-rs"
documentation = "https://docs.rs/imgui-winit-support"
license = "MIT OR Apache-2.0"
categories = ["gui"]
[dependencies]
imgui = { version = "0.12.0", path = "../imgui" }
winit = { version = "0.29.3", default-features = false }

202
imgui-winit-support/LICENSE-APACHE
View File

@ -1,202 +0,0 @@
Apache License
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http://www.apache.org/licenses/
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APPENDIX: How to apply the Apache License to your work.
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Copyright 2021 the imgui-rs developers
Licensed under the Apache License, Version 2.0 (the "License");
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See the License for the specific language governing permissions and
limitations under the License.

19
imgui-winit-support/LICENSE-MIT
View File

@ -1,19 +0,0 @@
Copyright (c) 2021 The imgui-rs Developers
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

5
imgui-winit-support/examples/README.md
View File

@ -1,5 +0,0 @@
See the examples for [`imgui-glium-renderer`][glium] or [`imgui-glow-renderer`][glow]
for simple examples of this platform backend with different renderers
[glium]: ../../imgui-glium-renderer/examples
[glow]: ../../imgui-glow-renderer/examples

576
imgui-winit-support/src/lib.rs
View File

@ -1,576 +0,0 @@
//! This crate provides a winit-based backend platform for imgui-rs.
//!
//! A backend platform handles window/input device events and manages their
//! state.
//!
//! # Using the library
//!
//! There are five things you need to do to use this library correctly:
//!
//! 1. Initialize a `WinitPlatform` instance
//! 2. Attach it to a winit `Window`
//! 3. Pass events to the platform (every frame)
//! 4. Call frame preparation callback (every frame)
//! 5. Call render preparation callback (every frame)
//!
//! ## Complete example (without a renderer)
//!
//! ```no_run
//! use imgui::Context;
//! use imgui_winit_support::{HiDpiMode, WinitPlatform};
//! use std::time::Instant;
//! use winit::event::{Event, WindowEvent};
//! use winit::event_loop::{ControlFlow, EventLoop};
//! use winit::window::Window;
//!
//! let mut event_loop = EventLoop::new().expect("Failed to create EventLoop");
//! let mut window = Window::new(&event_loop).unwrap();
//!
//! let mut imgui = Context::create();
//! // configure imgui-rs Context if necessary
//!
//! let mut platform = WinitPlatform::init(&mut imgui); // step 1
//! platform.attach_window(imgui.io_mut(), &window, HiDpiMode::Default); // step 2
//!
//! let mut last_frame = Instant::now();
//! let mut run = true;
//! event_loop.run(move |event, window_target| {
//! match event {
//! Event::NewEvents(_) => {
//! // other application-specific logic
//! let now = Instant::now();
//! imgui.io_mut().update_delta_time(now - last_frame);
//! last_frame = now;
//! },
//! Event::AboutToWait => {
//! // other application-specific logic
//! platform.prepare_frame(imgui.io_mut(), &window) // step 4
//! .expect("Failed to prepare frame");
//! window.request_redraw();
//! }
//! Event::WindowEvent { event: WindowEvent::RedrawRequested, .. } => {
//! let ui = imgui.frame();
//! // application-specific rendering *under the UI*
//!
//! // construct the UI
//!
//! platform.prepare_render(&ui, &window); // step 5
//! // render the UI with a renderer
//! let draw_data = imgui.render();
//! // renderer.render(..., draw_data).expect("UI rendering failed");
//!
//! // application-specific rendering *over the UI*
//! },
//! Event::WindowEvent { event: WindowEvent::CloseRequested, .. } => {
//! window_target.exit();
//! }
//! // other application-specific event handling
//! event => {
//! platform.handle_event(imgui.io_mut(), &window, &event); // step 3
//! // other application-specific event handling
//! }
//! }
//! }).expect("EventLoop error");
//! ```
use imgui::{self, BackendFlags, ConfigFlags, Context, Io, Key, Ui};
use std::cmp::Ordering;
// Re-export winit to make it easier for users to use the correct version.
pub use winit;
use winit::{
dpi::{LogicalPosition, LogicalSize},
keyboard::{Key as WinitKey, KeyLocation, NamedKey},
platform::modifier_supplement::KeyEventExtModifierSupplement,
};
use winit::{
error::ExternalError,
event::{ElementState, Event, MouseButton, MouseScrollDelta, TouchPhase, WindowEvent},
window::{CursorIcon as MouseCursor, Window},
};
/// winit backend platform state
#[derive(Debug)]
pub struct WinitPlatform {
hidpi_mode: ActiveHiDpiMode,
hidpi_factor: f64,
cursor_cache: Option<CursorSettings>,
}
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
struct CursorSettings {
cursor: Option<imgui::MouseCursor>,
draw_cursor: bool,
}
fn to_winit_cursor(cursor: imgui::MouseCursor) -> MouseCursor {
match cursor {
imgui::MouseCursor::Arrow => MouseCursor::Default,
imgui::MouseCursor::TextInput => MouseCursor::Text,
imgui::MouseCursor::ResizeAll => MouseCursor::Move,
imgui::MouseCursor::ResizeNS => MouseCursor::NsResize,
imgui::MouseCursor::ResizeEW => MouseCursor::EwResize,
imgui::MouseCursor::ResizeNESW => MouseCursor::NeswResize,
imgui::MouseCursor::ResizeNWSE => MouseCursor::NwseResize,
imgui::MouseCursor::Hand => MouseCursor::Grab,
imgui::MouseCursor::NotAllowed => MouseCursor::NotAllowed,
}
}
impl CursorSettings {
fn apply(&self, window: &Window) {
match self.cursor {
Some(mouse_cursor) if !self.draw_cursor => {
window.set_cursor_visible(true);
window.set_cursor_icon(to_winit_cursor(mouse_cursor));
}
_ => window.set_cursor_visible(false),
}
}
}
#[derive(Copy, Clone, Debug, PartialEq)]
enum ActiveHiDpiMode {
Default,
Rounded,
Locked,
}
/// DPI factor handling mode.
///
/// Applications that use imgui-rs might want to customize the used DPI factor and not use
/// directly the value coming from winit.
///
/// **Note: if you use a mode other than default and the DPI factor is adjusted, winit and imgui-rs
/// will use different logical coordinates, so be careful if you pass around logical size or
/// position values.**
#[derive(Copy, Clone, Debug, PartialEq)]
pub enum HiDpiMode {
/// The DPI factor from winit is used directly without adjustment
Default,
/// The DPI factor from winit is rounded to an integer value.
///
/// This prevents the user interface from becoming blurry with non-integer scaling.
Rounded,
/// The DPI factor from winit is ignored, and the included value is used instead.
///
/// This is useful if you want to force some DPI factor (e.g. 1.0) and not care about the value
/// coming from winit.
Locked(f64),
}
impl HiDpiMode {
fn apply(&self, hidpi_factor: f64) -> (ActiveHiDpiMode, f64) {
match *self {
HiDpiMode::Default => (ActiveHiDpiMode::Default, hidpi_factor),
HiDpiMode::Rounded => (ActiveHiDpiMode::Rounded, hidpi_factor.round()),
HiDpiMode::Locked(value) => (ActiveHiDpiMode::Locked, value),
}
}
}
fn to_imgui_mouse_button(button: MouseButton) -> Option<imgui::MouseButton> {
match button {
MouseButton::Left | MouseButton::Other(0) => Some(imgui::MouseButton::Left),
MouseButton::Right | MouseButton::Other(1) => Some(imgui::MouseButton::Right),
MouseButton::Middle | MouseButton::Other(2) => Some(imgui::MouseButton::Middle),
MouseButton::Other(3) => Some(imgui::MouseButton::Extra1),
MouseButton::Other(4) => Some(imgui::MouseButton::Extra2),
_ => None,
}
}
fn to_imgui_key(key: winit::keyboard::Key, location: KeyLocation) -> Option<Key> {
match (key.as_ref(), location) {
(WinitKey::Named(NamedKey::Tab), _) => Some(Key::Tab),
(WinitKey::Named(NamedKey::ArrowLeft), _) => Some(Key::LeftArrow),
(WinitKey::Named(NamedKey::ArrowRight), _) => Some(Key::RightArrow),
(WinitKey::Named(NamedKey::ArrowUp), _) => Some(Key::UpArrow),
(WinitKey::Named(NamedKey::ArrowDown), _) => Some(Key::DownArrow),
(WinitKey::Named(NamedKey::PageUp), _) => Some(Key::PageUp),
(WinitKey::Named(NamedKey::PageDown), _) => Some(Key::PageDown),
(WinitKey::Named(NamedKey::Home), _) => Some(Key::Home),
(WinitKey::Named(NamedKey::End), _) => Some(Key::End),
(WinitKey::Named(NamedKey::Insert), _) => Some(Key::Insert),
(WinitKey::Named(NamedKey::Delete), _) => Some(Key::Delete),
(WinitKey::Named(NamedKey::Backspace), _) => Some(Key::Backspace),
(WinitKey::Named(NamedKey::Space), _) => Some(Key::Space),
(WinitKey::Named(NamedKey::Enter), KeyLocation::Standard) => Some(Key::Enter),
(WinitKey::Named(NamedKey::Enter), KeyLocation::Numpad) => Some(Key::KeypadEnter),
(WinitKey::Named(NamedKey::Escape), _) => Some(Key::Escape),
(WinitKey::Named(NamedKey::Control), KeyLocation::Left) => Some(Key::LeftCtrl),
(WinitKey::Named(NamedKey::Control), KeyLocation::Right) => Some(Key::RightCtrl),
(WinitKey::Named(NamedKey::Shift), KeyLocation::Left) => Some(Key::LeftShift),
(WinitKey::Named(NamedKey::Shift), KeyLocation::Right) => Some(Key::RightShift),
(WinitKey::Named(NamedKey::Alt), KeyLocation::Left) => Some(Key::LeftAlt),
(WinitKey::Named(NamedKey::Alt), KeyLocation::Right) => Some(Key::RightAlt),
(WinitKey::Named(NamedKey::Super), KeyLocation::Left) => Some(Key::LeftSuper),
(WinitKey::Named(NamedKey::Super), KeyLocation::Right) => Some(Key::RightSuper),
(WinitKey::Named(NamedKey::ContextMenu), _) => Some(Key::Menu),
(WinitKey::Named(NamedKey::F1), _) => Some(Key::F1),
(WinitKey::Named(NamedKey::F2), _) => Some(Key::F2),
(WinitKey::Named(NamedKey::F3), _) => Some(Key::F3),
(WinitKey::Named(NamedKey::F4), _) => Some(Key::F4),
(WinitKey::Named(NamedKey::F5), _) => Some(Key::F5),
(WinitKey::Named(NamedKey::F6), _) => Some(Key::F6),
(WinitKey::Named(NamedKey::F7), _) => Some(Key::F7),
(WinitKey::Named(NamedKey::F8), _) => Some(Key::F8),
(WinitKey::Named(NamedKey::F9), _) => Some(Key::F9),
(WinitKey::Named(NamedKey::F10), _) => Some(Key::F10),
(WinitKey::Named(NamedKey::F11), _) => Some(Key::F11),
(WinitKey::Named(NamedKey::F12), _) => Some(Key::F12),
(WinitKey::Named(NamedKey::CapsLock), _) => Some(Key::CapsLock),
(WinitKey::Named(NamedKey::ScrollLock), _) => Some(Key::ScrollLock),
(WinitKey::Named(NamedKey::NumLock), _) => Some(Key::NumLock),
(WinitKey::Named(NamedKey::PrintScreen), _) => Some(Key::PrintScreen),
(WinitKey::Named(NamedKey::Pause), _) => Some(Key::Pause),
(WinitKey::Character("0"), KeyLocation::Standard) => Some(Key::Alpha0),
(WinitKey::Character("1"), KeyLocation::Standard) => Some(Key::Alpha1),
(WinitKey::Character("2"), KeyLocation::Standard) => Some(Key::Alpha2),
(WinitKey::Character("3"), KeyLocation::Standard) => Some(Key::Alpha3),
(WinitKey::Character("4"), KeyLocation::Standard) => Some(Key::Alpha4),
(WinitKey::Character("5"), KeyLocation::Standard) => Some(Key::Alpha5),
(WinitKey::Character("6"), KeyLocation::Standard) => Some(Key::Alpha6),
(WinitKey::Character("7"), KeyLocation::Standard) => Some(Key::Alpha7),
(WinitKey::Character("8"), KeyLocation::Standard) => Some(Key::Alpha8),
(WinitKey::Character("9"), KeyLocation::Standard) => Some(Key::Alpha9),
(WinitKey::Character("0"), KeyLocation::Numpad) => Some(Key::Keypad0),
(WinitKey::Character("1"), KeyLocation::Numpad) => Some(Key::Keypad1),
(WinitKey::Character("2"), KeyLocation::Numpad) => Some(Key::Keypad2),
(WinitKey::Character("3"), KeyLocation::Numpad) => Some(Key::Keypad3),
(WinitKey::Character("4"), KeyLocation::Numpad) => Some(Key::Keypad4),
(WinitKey::Character("5"), KeyLocation::Numpad) => Some(Key::Keypad5),
(WinitKey::Character("6"), KeyLocation::Numpad) => Some(Key::Keypad6),
(WinitKey::Character("7"), KeyLocation::Numpad) => Some(Key::Keypad7),
(WinitKey::Character("8"), KeyLocation::Numpad) => Some(Key::Keypad8),
(WinitKey::Character("9"), KeyLocation::Numpad) => Some(Key::Keypad9),
(WinitKey::Character("a"), _) => Some(Key::A),
(WinitKey::Character("b"), _) => Some(Key::B),
(WinitKey::Character("c"), _) => Some(Key::C),
(WinitKey::Character("d"), _) => Some(Key::D),
(WinitKey::Character("e"), _) => Some(Key::E),
(WinitKey::Character("f"), _) => Some(Key::F),
(WinitKey::Character("g"), _) => Some(Key::G),
(WinitKey::Character("h"), _) => Some(Key::H),
(WinitKey::Character("i"), _) => Some(Key::I),
(WinitKey::Character("j"), _) => Some(Key::J),
(WinitKey::Character("k"), _) => Some(Key::K),
(WinitKey::Character("l"), _) => Some(Key::L),
(WinitKey::Character("m"), _) => Some(Key::M),
(WinitKey::Character("n"), _) => Some(Key::N),
(WinitKey::Character("o"), _) => Some(Key::O),
(WinitKey::Character("p"), _) => Some(Key::P),
(WinitKey::Character("q"), _) => Some(Key::Q),
(WinitKey::Character("r"), _) => Some(Key::R),
(WinitKey::Character("s"), _) => Some(Key::S),
(WinitKey::Character("t"), _) => Some(Key::T),
(WinitKey::Character("u"), _) => Some(Key::U),
(WinitKey::Character("v"), _) => Some(Key::V),
(WinitKey::Character("w"), _) => Some(Key::W),
(WinitKey::Character("x"), _) => Some(Key::X),
(WinitKey::Character("y"), _) => Some(Key::Y),
(WinitKey::Character("z"), _) => Some(Key::Z),
(WinitKey::Character("'"), _) => Some(Key::Apostrophe),
(WinitKey::Character(","), KeyLocation::Standard) => Some(Key::Comma),
(WinitKey::Character("-"), KeyLocation::Standard) => Some(Key::Minus),
(WinitKey::Character("-"), KeyLocation::Numpad) => Some(Key::KeypadSubtract),
(WinitKey::Character("."), KeyLocation::Standard) => Some(Key::Period),
(WinitKey::Character("."), KeyLocation::Numpad) => Some(Key::KeypadDecimal),
(WinitKey::Character("/"), KeyLocation::Standard) => Some(Key::Slash),
(WinitKey::Character("/"), KeyLocation::Numpad) => Some(Key::KeypadDivide),
(WinitKey::Character(";"), _) => Some(Key::Semicolon),
(WinitKey::Character("="), KeyLocation::Standard) => Some(Key::Equal),
(WinitKey::Character("="), KeyLocation::Numpad) => Some(Key::KeypadEqual),
(WinitKey::Character("["), _) => Some(Key::LeftBracket),
(WinitKey::Character("\\"), _) => Some(Key::Backslash),
(WinitKey::Character("]"), _) => Some(Key::RightBracket),
(WinitKey::Character("`"), _) => Some(Key::GraveAccent),
(WinitKey::Character("*"), KeyLocation::Numpad) => Some(Key::KeypadMultiply),
(WinitKey::Character("+"), KeyLocation::Numpad) => Some(Key::KeypadAdd),
_ => None,
}
}
fn handle_key_modifier(io: &mut Io, key: &WinitKey, down: bool) {
match key {
WinitKey::Named(NamedKey::Shift) => io.add_key_event(imgui::Key::ModShift, down),
WinitKey::Named(NamedKey::Control) => io.add_key_event(imgui::Key::ModCtrl, down),
WinitKey::Named(NamedKey::Alt) => io.add_key_event(imgui::Key::ModAlt, down),
WinitKey::Named(NamedKey::Super) => io.add_key_event(imgui::Key::ModSuper, down),
_ => {}
}
}
impl WinitPlatform {
/// Initializes a winit platform instance and configures imgui.
///
/// This function configures imgui-rs in the following ways:
///
/// * backend flags are updated
/// * keys are configured
/// * platform name is set
pub fn init(imgui: &mut Context) -> WinitPlatform {
let io = imgui.io_mut();
io.backend_flags.insert(BackendFlags::HAS_MOUSE_CURSORS);
io.backend_flags.insert(BackendFlags::HAS_SET_MOUSE_POS);
imgui.set_platform_name(Some(format!(
"imgui-winit-support {}",
env!("CARGO_PKG_VERSION")
)));
WinitPlatform {
hidpi_mode: ActiveHiDpiMode::Default,
hidpi_factor: 1.0,
cursor_cache: None,
}
}
/// Attaches the platform instance to a winit window.
///
/// This function configures imgui-rs in the following ways:
///
/// * framebuffer scale (= DPI factor) is set
/// * display size is set
pub fn attach_window(&mut self, io: &mut Io, window: &Window, hidpi_mode: HiDpiMode) {
let (hidpi_mode, hidpi_factor) = hidpi_mode.apply(window.scale_factor());
self.hidpi_mode = hidpi_mode;
self.hidpi_factor = hidpi_factor;
io.display_framebuffer_scale = [hidpi_factor as f32, hidpi_factor as f32];
let logical_size = window.inner_size().to_logical(hidpi_factor);
let logical_size = self.scale_size_from_winit(window, logical_size);
io.display_size = [logical_size.width as f32, logical_size.height as f32];
}
/// Returns the current DPI factor.
///
/// The value might not be the same as the winit DPI factor (depends on the used DPI mode)
pub fn hidpi_factor(&self) -> f64 {
self.hidpi_factor
}
/// Scales a logical size coming from winit using the current DPI mode.
///
/// This utility function is useful if you are using a DPI mode other than default, and want
/// your application to use the same logical coordinates as imgui-rs.
pub fn scale_size_from_winit(
&self,
window: &Window,
logical_size: LogicalSize<f64>,
) -> LogicalSize<f64> {
match self.hidpi_mode {
ActiveHiDpiMode::Default => logical_size,
_ => logical_size
.to_physical::<f64>(window.scale_factor())
.to_logical(self.hidpi_factor),
}
}
/// Scales a logical position coming from winit using the current DPI mode.
///
/// This utility function is useful if you are using a DPI mode other than default, and want
/// your application to use the same logical coordinates as imgui-rs.
pub fn scale_pos_from_winit(
&self,
window: &Window,
logical_pos: LogicalPosition<f64>,
) -> LogicalPosition<f64> {
match self.hidpi_mode {
ActiveHiDpiMode::Default => logical_pos,
_ => logical_pos
.to_physical::<f64>(window.scale_factor())
.to_logical(self.hidpi_factor),
}
}
/// Scales a logical position for winit using the current DPI mode.
///
/// This utility function is useful if you are using a DPI mode other than default, and want
/// your application to use the same logical coordinates as imgui-rs.
pub fn scale_pos_for_winit(
&self,
window: &Window,
logical_pos: LogicalPosition<f64>,
) -> LogicalPosition<f64> {
match self.hidpi_mode {
ActiveHiDpiMode::Default => logical_pos,
_ => logical_pos
.to_physical::<f64>(self.hidpi_factor)
.to_logical(window.scale_factor()),
}
}
/// Handles a winit event.
///
/// This function performs the following actions (depends on the event):
///
/// * window size / dpi factor changes are applied
/// * keyboard state is updated
/// * mouse state is updated
pub fn handle_event<T>(&mut self, io: &mut Io, window: &Window, event: &Event<T>) {
match *event {
Event::WindowEvent {
window_id,
ref event,
} if window_id == window.id() => {
self.handle_window_event(io, window, event);
}
// Track key release events outside our window. If we don't do this,
// we might never see the release event if some other window gets focus.
// Event::DeviceEvent {
// event:
// DeviceEvent::Key(RawKeyEvent {
// physical_key,
// state: ElementState::Released,
// }),
// ..
// } => {
// if let Some(key) = to_imgui_key(key) {
// io.add_key_event(key, false);
// }
// }
_ => (),
}
}
fn handle_window_event(&mut self, io: &mut Io, window: &Window, event: &WindowEvent) {
match *event {
WindowEvent::Resized(physical_size) => {
let logical_size = physical_size.to_logical(window.scale_factor());
let logical_size = self.scale_size_from_winit(window, logical_size);
io.display_size = [logical_size.width as f32, logical_size.height as f32];
}
WindowEvent::ScaleFactorChanged { scale_factor, .. } => {
let hidpi_factor = match self.hidpi_mode {
ActiveHiDpiMode::Default => scale_factor,
ActiveHiDpiMode::Rounded => scale_factor.round(),
_ => return,
};
// Mouse position needs to be changed while we still have both the old and the new
// values
if io.mouse_pos[0].is_finite() && io.mouse_pos[1].is_finite() {
io.mouse_pos = [
io.mouse_pos[0] * (hidpi_factor / self.hidpi_factor) as f32,
io.mouse_pos[1] * (hidpi_factor / self.hidpi_factor) as f32,
];
}
self.hidpi_factor = hidpi_factor;
io.display_framebuffer_scale = [hidpi_factor as f32, hidpi_factor as f32];
// Window size might change too if we are using DPI rounding
let logical_size = window.inner_size().to_logical(scale_factor);
let logical_size = self.scale_size_from_winit(window, logical_size);
io.display_size = [logical_size.width as f32, logical_size.height as f32];
}
WindowEvent::ModifiersChanged(modifiers) => {
let state = modifiers.state();
// We need to track modifiers separately because some system like macOS, will
// not reliably send modifier states during certain events like ScreenCapture.
// Gotta let the people show off their pretty imgui widgets!
io.add_key_event(Key::ModShift, state.shift_key());
io.add_key_event(Key::ModCtrl, state.control_key());
io.add_key_event(Key::ModAlt, state.alt_key());
io.add_key_event(Key::ModSuper, state.super_key());
}
WindowEvent::KeyboardInput { ref event, .. } => {
if let Some(txt) = &event.text {
for ch in txt.chars() {
if ch != '\u{7f}' {
io.add_input_character(ch)
}
}
}
let key = event.key_without_modifiers();
let pressed = event.state == ElementState::Pressed;
// We map both left and right ctrl to `ModCtrl`, etc.
// imgui is told both "left control is pressed" and
// "consider the control key is pressed". Allows
// applications to use either general "ctrl" or a
// specific key. Same applies to other modifiers.
// https://github.com/ocornut/imgui/issues/5047
handle_key_modifier(io, &key, pressed);
// Add main key event
if let Some(key) = to_imgui_key(key, event.location) {
io.add_key_event(key, pressed);
}
}
WindowEvent::CursorMoved { position, .. } => {
let position = position.to_logical(window.scale_factor());
let position = self.scale_pos_from_winit(window, position);
io.add_mouse_pos_event([position.x as f32, position.y as f32]);
}
WindowEvent::MouseWheel {
delta,
phase: TouchPhase::Moved,
..
} => {
let (h, v) = match delta {
MouseScrollDelta::LineDelta(h, v) => (h, v),
MouseScrollDelta::PixelDelta(pos) => {
let pos = pos.to_logical::<f64>(self.hidpi_factor);
let h = match pos.x.partial_cmp(&0.0) {
Some(Ordering::Greater) => 1.0,
Some(Ordering::Less) => -1.0,
_ => 0.0,
};
let v = match pos.y.partial_cmp(&0.0) {
Some(Ordering::Greater) => 1.0,
Some(Ordering::Less) => -1.0,
_ => 0.0,
};
(h, v)
}
};
io.add_mouse_wheel_event([h, v]);
}
WindowEvent::MouseInput { state, button, .. } => {
if let Some(mb) = to_imgui_mouse_button(button) {
let pressed = state == ElementState::Pressed;
io.add_mouse_button_event(mb, pressed);
}
}
WindowEvent::Focused(newly_focused) => {
if !newly_focused {
// Set focus-lost to avoid stuck keys (like 'alt'
// when alt-tabbing)
io.app_focus_lost = true;
}
}
_ => (),
}
}
/// Frame preparation callback.
///
/// Call this before calling the imgui-rs context `frame` function.
/// This function performs the following actions:
///
/// * mouse cursor is repositioned (if requested by imgui-rs)
pub fn prepare_frame(&self, io: &mut Io, window: &Window) -> Result<(), ExternalError> {
if io.want_set_mouse_pos {
let logical_pos = self.scale_pos_for_winit(
window,
LogicalPosition::new(f64::from(io.mouse_pos[0]), f64::from(io.mouse_pos[1])),
);
window.set_cursor_position(logical_pos)
} else {
Ok(())
}
}
/// Render preparation callback.
///
/// Call this before calling the imgui-rs UI `render_with`/`render` function.
/// This function performs the following actions:
///
/// * mouse cursor is changed and/or hidden (if requested by imgui-rs)
pub fn prepare_render(&mut self, ui: &Ui, window: &Window) {
let io = ui.io();
if !io
.config_flags
.contains(ConfigFlags::NO_MOUSE_CURSOR_CHANGE)
{
let cursor = CursorSettings {
cursor: ui.mouse_cursor(),
draw_cursor: io.mouse_draw_cursor,
};
if self.cursor_cache != Some(cursor) {
cursor.apply(window);
self.cursor_cache = Some(cursor);
}
}
}
}