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added imgui support, it works

ObjectDef
Milk.H 2023-03-15 15:51:30 +01:00
parent bcba7739c8
commit 82bdbdd758
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17 changed files with 3110 additions and 2 deletions
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5
Cargo.toml
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@ -11,4 +11,7 @@ image = "0.24.5"
cgmath = "0.18.0"
tobj = "2.0.0"
glow = "0.12.1"
sdl2 = "0.35.2"
sdl2 = "0.34.5"
imgui = "0.10.0"
imgui-glow-renderer = {path = "./imgui_glow_renderer"}
imgui-sdl2-support = {path = "./imgui_sdl2_support"}

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imgui_glow_renderer/Cargo.toml Normal file
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[package]
name = "imgui-glow-renderer"
version = "0.10.0"
edition = "2018"
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/Apache-2.0"
categories = ["gui", "rendering"]
[dependencies]
imgui = { version = "0.10.0" }
glow = "0.12.0"
memoffset = "0.6.4"
[dev-dependencies]
glutin = "0.29.1"
imgui-winit-support = { version = "0.10.0"}
image = "0.23"
[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 Normal file
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@ -0,0 +1,202 @@
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imgui_glow_renderer/LICENSE-MIT Normal file
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@ -0,0 +1,19 @@
Copyright (c) 2021 The imgui-rs Developers
Permission is hereby granted, free of charge, to any person obtaining a copy
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SOFTWARE.

115
imgui_glow_renderer/examples/glow_01_basic.rs Normal file
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//! A basic self-contained example to get you from zero-to-demo-window as fast
//! as possible.
use std::time::Instant;
use glow::HasContext;
use glutin::{event_loop::EventLoop, WindowedContext};
use imgui_winit_support::WinitPlatform;
const TITLE: &str = "Hello, imgui-rs!";
type Window = WindowedContext<glutin::PossiblyCurrent>;
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) = create_window();
let (mut winit_platform, mut imgui_context) = imgui_init(&window);
// OpenGL context from glow
let gl = glow_context(&window);
// 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, _, control_flow| {
match event {
glutin::event::Event::NewEvents(_) => {
let now = Instant::now();
imgui_context
.io_mut()
.update_delta_time(now.duration_since(last_frame));
last_frame = now;
}
glutin::event::Event::MainEventsCleared => {
winit_platform
.prepare_frame(imgui_context.io_mut(), window.window())
.unwrap();
window.window().request_redraw();
}
glutin::event::Event::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.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");
window.swap_buffers().unwrap();
}
glutin::event::Event::WindowEvent {
event: glutin::event::WindowEvent::CloseRequested,
..
} => {
*control_flow = glutin::event_loop::ControlFlow::Exit;
}
event => {
winit_platform.handle_event(imgui_context.io_mut(), window.window(), &event);
}
}
});
}
fn create_window() -> (EventLoop<()>, Window) {
let event_loop = glutin::event_loop::EventLoop::new();
let window = glutin::window::WindowBuilder::new()
.with_title(TITLE)
.with_inner_size(glutin::dpi::LogicalSize::new(1024, 768));
let window = glutin::ContextBuilder::new()
.with_vsync(true)
.build_windowed(window, &event_loop)
.expect("could not create window");
let window = unsafe {
window
.make_current()
.expect("could not make window context current")
};
(event_loop, window)
}
fn glow_context(window: &Window) -> glow::Context {
unsafe { glow::Context::from_loader_function(|s| window.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.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)
}

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imgui_glow_renderer/examples/glow_02_triangle.rs Normal file
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//! A basic example showing imgui rendering on top of a simple custom scene.
use std::time::Instant;
mod utils;
use utils::Triangler;
fn main() {
let (event_loop, window) = utils::create_window("Hello, triangle!", glutin::GlRequest::Latest);
let (mut winit_platform, mut imgui_context) = utils::imgui_init(&window);
let gl = utils::glow_context(&window);
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, _, control_flow| {
match event {
glutin::event::Event::NewEvents(_) => {
let now = Instant::now();
imgui_context
.io_mut()
.update_delta_time(now.duration_since(last_frame));
last_frame = now;
}
glutin::event::Event::MainEventsCleared => {
winit_platform
.prepare_frame(imgui_context.io_mut(), window.window())
.unwrap();
window.window().request_redraw();
}
glutin::event::Event::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.window());
let draw_data = imgui_context.render();
// Render imgui on top of it
ig_renderer
.render(draw_data)
.expect("error rendering imgui");
window.swap_buffers().unwrap();
}
glutin::event::Event::WindowEvent {
event: glutin::event::WindowEvent::CloseRequested,
..
} => {
*control_flow = glutin::event_loop::ControlFlow::Exit;
}
glutin::event::Event::LoopDestroyed => {
let gl = ig_renderer.gl_context();
tri_renderer.destroy(gl);
}
event => {
winit_platform.handle_event(imgui_context.io_mut(), window.window(), &event);
}
}
});
}

84
imgui_glow_renderer/examples/glow_03_triangle_gles.rs Normal file
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//! 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::time::Instant;
mod utils;
use utils::Triangler;
fn main() {
let (event_loop, window) = utils::create_window(
"Hello, triangle! (GLES 3.0)",
glutin::GlRequest::Specific(glutin::Api::OpenGlEs, (3, 0)),
);
let (mut winit_platform, mut imgui_context) = utils::imgui_init(&window);
let gl = utils::glow_context(&window);
// 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, _, control_flow| {
match event {
glutin::event::Event::NewEvents(_) => {
let now = Instant::now();
imgui_context
.io_mut()
.update_delta_time(now.duration_since(last_frame));
last_frame = now;
}
glutin::event::Event::MainEventsCleared => {
winit_platform
.prepare_frame(imgui_context.io_mut(), window.window())
.unwrap();
window.window().request_redraw();
}
glutin::event::Event::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.window());
let draw_data = imgui_context.render();
// Render imgui on top
ig_renderer
.render(&gl, &texture_map, draw_data)
.expect("error rendering imgui");
window.swap_buffers().unwrap();
}
glutin::event::Event::WindowEvent {
event: glutin::event::WindowEvent::CloseRequested,
..
} => {
*control_flow = glutin::event_loop::ControlFlow::Exit;
}
glutin::event::Event::LoopDestroyed => {
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.window(), &event);
}
}
});
}

298
imgui_glow_renderer/examples/glow_04_custom_textures.rs Normal file
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//! 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, time::Instant};
use glow::HasContext;
use image::{jpeg::JpegDecoder, ImageDecoder};
use imgui::Condition;
use imgui_glow_renderer::Renderer;
#[allow(dead_code)]
mod utils;
const LENNA_JPEG: &[u8] = include_bytes!("../../resources/Lenna.jpg");
fn main() {
let (event_loop, window) = utils::create_window("Custom textures", glutin::GlRequest::Latest);
let (mut winit_platform, mut imgui_context) = utils::imgui_init(&window);
let gl = utils::glow_context(&window);
// 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, _, control_flow| {
// 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!
*control_flow = glutin::event_loop::ControlFlow::Poll;
match event {
glutin::event::Event::NewEvents(_) => {
let now = Instant::now();
imgui_context
.io_mut()
.update_delta_time(now.duration_since(last_frame));
last_frame = now;
}
glutin::event::Event::MainEventsCleared => {
winit_platform
.prepare_frame(imgui_context.io_mut(), window.window())
.unwrap();
window.window().request_redraw();
}
glutin::event::Event::RedrawRequested(_) => {
unsafe { gl.clear(glow::COLOR_BUFFER_BIT) };
let ui = imgui_context.frame();
textures_ui.show(ui);
winit_platform.prepare_render(ui, window.window());
let draw_data = imgui_context.render();
ig_renderer
.render(&gl, &textures, draw_data)
.expect("error rendering imgui");
window.swap_buffers().unwrap();
}
glutin::event::Event::WindowEvent {
event: glutin::event::WindowEvent::CloseRequested,
..
} => {
*control_flow = glutin::event_loop::ControlFlow::Exit;
}
glutin::event::Event::LoopDestroyed => {
ig_renderer.destroy(&gl);
}
event => {
winit_platform.handle_event(imgui_context.io_mut(), window.window(), &event);
}
}
});
}
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);
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);
}
}

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use glow::HasContext;
use glutin::{event_loop::EventLoop, GlRequest};
use imgui_winit_support::WinitPlatform;
pub type Window = glutin::WindowedContext<glutin::PossiblyCurrent>;
pub fn create_window(title: &str, gl_request: GlRequest) -> (EventLoop<()>, Window) {
let event_loop = glutin::event_loop::EventLoop::new();
let window = glutin::window::WindowBuilder::new()
.with_title(title)
.with_inner_size(glutin::dpi::LogicalSize::new(1024, 768));
let window = glutin::ContextBuilder::new()
.with_gl(gl_request)
.with_vsync(true)
.build_windowed(window, &event_loop)
.expect("could not create window");
let window = unsafe {
window
.make_current()
.expect("could not make window context current")
};
(event_loop, window)
}
pub fn glow_context(window: &Window) -> glow::Context {
unsafe { glow::Context::from_loader_function(|s| window.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.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);
}
}
}

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188
imgui_glow_renderer/src/versions.rs Normal file
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#![allow(clippy::must_use_candidate)]
#[derive(PartialEq, Clone, Copy)]
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 Normal file
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[package]
name = "imgui-sdl2-support"
version = "0.10.0"
edition = "2018"
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/Apache-2.0"
categories = ["gui"]
[dependencies]
imgui = { version = "0.10.0" }
sdl2 = "0.34.5"
[dev-dependencies]
glow = "0.12.0"
imgui-glow-renderer = { version = "0.10.0", path = "../imgui-glow-renderer" }
sdl2 = { version = "0.34.5", features = ["bundled", "static-link"] }

202
imgui_sdl2_support/LICENSE-APACHE Normal file
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Apache License
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http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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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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19
imgui_sdl2_support/LICENSE-MIT Normal file
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@ -0,0 +1,19 @@
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
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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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 Normal file
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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 Normal file
View File

@ -0,0 +1,388 @@
//! 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)
}
_ => {}
}
}
}

46
src/main.rs
View File

@ -9,18 +9,25 @@ const SCR_HEIGHT: u32 = 900;
const TITLE: &str = "GLFWtest";
use imgui_glow_renderer::AutoRenderer;
use imgui_sdl2_support::SdlPlatform;
use glow::*;
use sdl2;
use sdl2::pixels::Color;
use sdl2::keyboard::Keycode;
use sdl2::event::Event;
use std::sync::mpsc::Receiver;
use std::ptr;
use std::mem;
use std::os::raw::c_void;
use std::path::Path;
use std::ffi::{CString, CStr};
mod shader;
mod model;
mod camera;
@ -77,6 +84,23 @@ fn main() {
};
let mut imgui = imgui::Context::create();
imgui
.fonts()
.add_font(&[imgui::FontSource::DefaultFontData {config: None}]);
let mut platform = SdlPlatform::init(&mut imgui);
let mut renderer = match AutoRenderer::initialize(gl.clone(), &mut imgui)
{
Ok(ret) => ret,
Err(s) => panic!("Failed to initialize Imgui Platform Renderer: {}", s),
};
// NOTE intiialize Camera
let mut camera = camera::Camera {
Position: Point3::new(0.0, 0.40, 1.0),
Pitch: -20.0,
@ -131,12 +155,32 @@ fn main() {
model = model * Matrix4::from_scale(0.2);
ourshader.setMat4("model", &model);
}
ourModel.Draw(&ourshader);
platform.prepare_frame(&mut imgui, &window, &events_loop);
let ui = imgui.new_frame();
ui.window("POLY I WILL FUCKING")
.size([500.0, 100.0], imgui::Condition::FirstUseEver)
.build(|| {
ui.text("you serve no purpose in life");
ui.text("Your Purpose in life is to suck my dick");
});
let draw_data = imgui.render();
renderer.render(draw_data).unwrap();
window.gl_swap_window();
for event in events_loop.poll_iter() {
platform.handle_event(&mut imgui, &event);
match event {
Event::Quit {..} |