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33
imgui-gfx-examples/Cargo.toml
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[package]
name = "imgui-gfx-examples"
version = "0.0.0"
edition = "2018"
authors = ["The imgui-rs Developers"]
description = "imgui crate examples"
homepage = "https://github.com/imgui-rs/imgui-rs"
repository = "https://github.com/imgui-rs/imgui-rs"
license = "MIT/Apache-2.0"
publish = false
[badges]
maintenance = { status = "deprecated" }
[features]
opengl = ["imgui-gfx-renderer/opengl"]
# FIXME
# directx = ["imgui-gfx-renderer/directx"]
default = ["opengl"]
[dev-dependencies]
gfx = "0.18"
gfx_device_gl = "0.16"
glutin = "0.27"
image = "0.23"
imgui = { path = "../imgui" }
imgui-gfx-renderer = { path = "../imgui-gfx-renderer" }
imgui-winit-support = { path = "../imgui-winit-support" }
old_school_gfx_glutin_ext = "0.27"
[target.'cfg(windows)'.dev-dependencies]
gfx_device_dx11 = "0.8"
gfx_window_dxgi = "0.19"

4
imgui-gfx-examples/README.md
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# `imgui-gfx-examples`
- Run with OpenGL backend: `cargo run --example gfx_hello_world`
- Run with DirectX backend: `cargo run --example gfx_hello_world --features directx --no-default-features`

128
imgui-gfx-examples/examples/gfx_custom_textures.rs
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use gfx::texture::{FilterMethod, SamplerInfo, WrapMode};
use image::ImageFormat;
use imgui::*;
use std::error::Error;
mod support;
#[derive(Default)]
struct CustomTexturesApp {
my_texture_id: Option<TextureId>,
lenna: Option<Lenna>,
}
struct Lenna {
texture_id: TextureId,
size: [f32; 2],
}
impl CustomTexturesApp {
fn register_textures<R, F>(
&mut self,
factory: &mut F,
textures: &mut Textures<imgui_gfx_renderer::Texture<R>>,
) -> Result<(), Box<dyn Error>>
where
R: gfx::Resources,
F: gfx::Factory<R>,
{
const WIDTH: usize = 128;
const HEIGHT: usize = 128;
if self.my_texture_id.is_none() {
// Generate dummy texture
let mut data = Vec::with_capacity(WIDTH * HEIGHT * 4);
for i in 0..WIDTH {
for j in 0..HEIGHT {
// Insert RGBA values
data.push(i as u8);
data.push(j as u8);
data.push((i + j) as u8);
data.push(255);
}
}
let (_, texture_view) = factory.create_texture_immutable_u8::<gfx::format::Srgba8>(
gfx::texture::Kind::D2(WIDTH as u16, HEIGHT as u16, gfx::texture::AaMode::Single),
gfx::texture::Mipmap::Provided,
&[data.as_slice()],
)?;
let sampler =
factory.create_sampler(SamplerInfo::new(FilterMethod::Bilinear, WrapMode::Clamp));
let texture_id = textures.insert((texture_view, sampler));
self.my_texture_id = Some(texture_id);
}
if self.lenna.is_none() {
self.lenna = Some(Lenna::new(factory, textures)?);
}
Ok(())
}
fn show_textures(&self, ui: &Ui) {
Window::new("Hello textures")
.size([400.0, 600.0], Condition::FirstUseEver)
.build(ui, || {
ui.text("Hello textures!");
if let Some(my_texture_id) = self.my_texture_id {
ui.text("Some generated texture");
Image::new(my_texture_id, [100.0, 100.0]).build(ui);
}
if let Some(lenna) = &self.lenna {
ui.text("Say hello to Lenna.jpg");
lenna.show(ui);
}
});
}
}
impl Lenna {
fn new<R, F>(
factory: &mut F,
textures: &mut Textures<imgui_gfx_renderer::Texture<R>>,
) -> Result<Self, Box<dyn Error>>
where
R: gfx::Resources,
F: gfx::Factory<R>,
{
let lenna_bytes = include_bytes!("../../resources/Lenna.jpg");
let image = image::load_from_memory_with_format(lenna_bytes, ImageFormat::Jpeg)?;
// gfx doesn't support easily RGB8 without alpha, so we need to convert
let image = image.to_rgba8();
let (width, height) = image.dimensions();
let raw_data = image.into_raw();
let (_, texture_view) = factory.create_texture_immutable_u8::<gfx::format::Srgba8>(
gfx::texture::Kind::D2(width as u16, height as u16, gfx::texture::AaMode::Single),
gfx::texture::Mipmap::Provided,
&[raw_data.as_slice()],
)?;
let sampler =
factory.create_sampler(SamplerInfo::new(FilterMethod::Bilinear, WrapMode::Clamp));
let texture_id = textures.insert((texture_view, sampler));
Ok(Lenna {
texture_id,
size: [width as f32, height as f32],
})
}
fn show(&self, ui: &Ui) {
Image::new(self.texture_id, self.size).build(ui);
}
}
fn main() {
let mut my_app = CustomTexturesApp::default();
let mut system = support::init(file!());
my_app
.register_textures(
&mut system.render_sys.factory,
system.render_sys.renderer.textures(),
)
.expect("Failed to register textures");
system.main_loop(|_, ui| my_app.show_textures(ui));
}

29
imgui-gfx-examples/examples/gfx_hello_world.rs
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use imgui::*;
mod support;
fn main() {
let system = support::init(file!());
let window_title = if cfg!(all(feature = "directx", windows)) {
"Hello world (OpenGL)"
} else {
"Hello world (DirectX)"
};
system.main_loop(|_, ui| {
Window::new(window_title)
.size([300.0, 100.0], Condition::FirstUseEver)
.build(ui, || {
ui.text("Hello world!");
ui.text("こんにちは世界！");
ui.text("This...is...imgui-rs!");
ui.separator();
let mouse_pos = ui.io().mouse_pos;
ui.text(format!(
"Mouse Position: ({:.1},{:.1})",
mouse_pos[0], mouse_pos[1]
));
});
});
}

6
imgui-gfx-examples/examples/gfx_test_window.rs
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mod support;
fn main() {
let system = support::init(file!());
system.main_loop(|run, ui| ui.show_demo_window(run));
}

286
imgui-gfx-examples/examples/support/mod.rs
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use gfx::Device;
use glutin::{
dpi::LogicalSize,
event::{Event, WindowEvent},
event_loop::{ControlFlow, EventLoop},
// XXX for easier porting...
platform::run_return::EventLoopExtRunReturn,
window::WindowBuilder,
};
use imgui::{Context, FontConfig, FontGlyphRanges, FontSource, Ui};
use imgui_gfx_renderer::{Renderer, Shaders};
use imgui_winit_support::{HiDpiMode, WinitPlatform};
use old_school_gfx_glutin_ext::*;
use std::time::Instant;
type ColorFormat = gfx::format::Rgba8;
type DepthFormat = gfx::format::DepthStencil;
// hack
type EventsLoop = EventLoop<()>;
pub struct System {
pub events_loop: EventsLoop,
pub imgui: Context,
pub platform: WinitPlatform,
pub render_sys: RenderSystem,
pub font_size: f32,
}
pub fn init(title: &str) -> System {
let title = match title.rfind('/') {
Some(idx) => title.split_at(idx + 1).1,
None => title,
};
let events_loop = EventsLoop::new();
let builder = WindowBuilder::new()
.with_title(title.to_owned())
.with_inner_size(LogicalSize::new(1024f64, 768f64));
let mut imgui = Context::create();
imgui.set_ini_filename(None);
let mut platform = WinitPlatform::init(&mut imgui);
let hidpi_factor = platform.hidpi_factor();
let font_size = (13.0 * hidpi_factor) as f32;
imgui.fonts().add_font(&[
FontSource::DefaultFontData {
config: Some(FontConfig {
size_pixels: font_size,
..FontConfig::default()
}),
},
FontSource::TtfData {
data: include_bytes!("../../../resources/mplus-1p-regular.ttf"),
size_pixels: font_size,
config: Some(FontConfig {
rasterizer_multiply: 1.75,
glyph_ranges: FontGlyphRanges::japanese(),
..FontConfig::default()
}),
},
]);
imgui.io_mut().font_global_scale = (1.0 / hidpi_factor) as f32;
let render_sys = RenderSystem::init(&mut imgui, builder, &events_loop);
platform.attach_window(imgui.io_mut(), render_sys.window(), HiDpiMode::Rounded);
System {
events_loop,
imgui,
platform,
render_sys,
font_size,
}
}
impl System {
pub fn main_loop<F: FnMut(&mut bool, &mut Ui)>(self, mut run_ui: F) {
let System {
mut events_loop,
mut imgui,
mut platform,
mut render_sys,
..
} = self;
let mut encoder: gfx::Encoder<_, _> = render_sys.factory.create_command_buffer().into();
let mut last_frame = Instant::now();
let mut run = true;
while run {
events_loop.run_return(|event, _, control_flow| {
platform.handle_event(imgui.io_mut(), render_sys.window(), &event);
if let Event::WindowEvent { event, .. } = event {
match event {
WindowEvent::Resized(_) => render_sys.update_views(),
WindowEvent::CloseRequested => {
run = false;
}
_ => (),
}
}
*control_flow = ControlFlow::Exit;
});
if !run {
break;
}
let io = imgui.io_mut();
platform
.prepare_frame(io, render_sys.window())
.expect("Failed to start frame");
let now = Instant::now();
io.update_delta_time(now - last_frame);
last_frame = now;
let mut ui = imgui.frame();
run_ui(&mut run, &mut ui);
if let Some(main_color) = render_sys.main_color.as_mut() {
encoder.clear(main_color, [1.0, 1.0, 1.0, 1.0]);
}
platform.prepare_render(&ui, render_sys.window());
let draw_data = ui.render();
if let Some(main_color) = render_sys.main_color.as_mut() {
render_sys
.renderer
.render(&mut render_sys.factory, &mut encoder, main_color, draw_data)
.expect("Rendering failed");
}
encoder.flush(&mut render_sys.device);
render_sys.swap_buffers();
render_sys.device.cleanup();
}
}
}
#[cfg(feature = "opengl")]
mod types {
pub type Device = gfx_device_gl::Device;
pub type Factory = gfx_device_gl::Factory;
pub type Resources = gfx_device_gl::Resources;
}
#[cfg(feature = "opengl")]
pub struct RenderSystem {
pub renderer: Renderer<ColorFormat, types::Resources>,
pub windowed_context: glutin::WindowedContext<glutin::PossiblyCurrent>,
pub device: types::Device,
pub factory: types::Factory,
pub main_color: Option<gfx::handle::RenderTargetView<types::Resources, ColorFormat>>,
pub main_depth: gfx::handle::DepthStencilView<types::Resources, DepthFormat>,
}
#[cfg(feature = "opengl")]
impl RenderSystem {
pub fn init(
imgui: &mut Context,
builder: WindowBuilder,
events_loop: &EventsLoop,
) -> RenderSystem {
{
// Fix incorrect colors with sRGB framebuffer
fn imgui_gamma_to_linear(col: [f32; 4]) -> [f32; 4] {
let x = col[0].powf(2.2);
let y = col[1].powf(2.2);
let z = col[2].powf(2.2);
let w = 1.0 - (1.0 - col[3]).powf(2.2);
[x, y, z, w]
}
let style = imgui.style_mut();
for col in 0..style.colors.len() {
style.colors[col] = imgui_gamma_to_linear(style.colors[col]);
}
}
let (windowed_context, device, mut factory, main_color, main_depth) =
glutin::ContextBuilder::new()
.with_vsync(true)
.with_gfx_color_depth::<ColorFormat, DepthFormat>()
.build_windowed(builder, events_loop)
.expect("Failed to initialize graphics")
.init_gfx::<ColorFormat, DepthFormat>();
let shaders = {
let version = device.get_info().shading_language;
if version.is_embedded {
if version.major >= 3 {
Shaders::GlSlEs300
} else {
Shaders::GlSlEs100
}
} else if version.major >= 4 {
Shaders::GlSl400
} else if version.major >= 3 {
if version.minor >= 2 {
Shaders::GlSl150
} else {
Shaders::GlSl130
}
} else {
Shaders::GlSl110
}
};
let renderer =
Renderer::init(imgui, &mut factory, shaders).expect("Failed to initialize renderer");
RenderSystem {
renderer,
windowed_context,
device,
factory,
main_color: Some(main_color),
main_depth,
}
}
pub fn window(&self) -> &glutin::window::Window {
self.windowed_context.window()
}
pub fn update_views(&mut self) {
if let Some(main_color) = self.main_color.as_mut() {
self.windowed_context
.update_gfx(main_color, &mut self.main_depth);
}
}
pub fn swap_buffers(&mut self) {
self.windowed_context.swap_buffers().unwrap();
}
}
#[cfg(all(feature = "directx", windows))]
mod types {
pub type Device = gfx_device_dx11::Device;
pub type Factory = gfx_device_dx11::Factory;
pub type Resources = gfx_device_dx11::Resources;
}
#[cfg(all(feature = "directx", windows))]
pub struct RenderSystem {
pub renderer: Renderer<ColorFormat, types::Resources>,
pub window: gfx_window_dxgi::Window,
pub device: types::Device,
pub factory: types::Factory,
pub main_color: Option<gfx::handle::RenderTargetView<types::Resources, ColorFormat>>,
}
#[cfg(all(feature = "directx", windows))]
impl RenderSystem {
pub fn init(
imgui: &mut Context,
builder: WindowBuilder,
events_loop: &EventsLoop,
) -> RenderSystem {
let (window, device, mut factory, main_color) =
gfx_window_dxgi::init(builder, &events_loop).expect("Failed to initialize graphics");
let renderer = Renderer::init(imgui, &mut factory, Shaders::HlslSm40)
.expect("Failed to initialize renderer");
RenderSystem {
renderer,
window,
device,
factory,
main_color: Some(main_color),
}
}
pub fn window(&self) -> &glutin::Window {
&self.window.inner
}
pub fn update_views(&mut self, size: LogicalSize) {
let physical = size.to_physical(self.window().get_hidpi_factor());
let (width, height): (u32, u32) = physical.into();
let _ = self.main_color.take(); // we need to drop main_color before calling update_views
self.main_color = Some(
gfx_window_dxgi::update_views(
&mut self.window,
&mut self.factory,
&mut self.device,
width as u16,
height as u16,
)
.expect("Failed to update resize"),
);
}
pub fn swap_buffers(&mut self) {
self.window.swap_buffers(1);
}
}

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imgui-gfx-renderer/Cargo.toml
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[package]
name = "imgui-gfx-renderer"
version = "0.8.0"
edition = "2018"
authors = ["The imgui-rs Developers"]
description = "gfx 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"]
[features]
opengl = []
directx = []
default = ["opengl"]
[badges]
maintenance = { status = "deprecated" }
[dependencies]
gfx = "0.18"
imgui = { version = "0.8.0", path = "../imgui" }
[target.'cfg(windows)'.build-dependencies]
winapi = { version = "0.3", features = ["d3dcompiler"] }

202
imgui-gfx-renderer/LICENSE-APACHE
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19
imgui-gfx-renderer/LICENSE-MIT
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@ -1,19 +0,0 @@
Copyright (c) 2015-2020 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.

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imgui-gfx-renderer/build.rs
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fn main() {
#[cfg(windows)]
{
// Note: When building on Windows, this build script will automatically recompile the HLSL shaders.
use std::env;
use std::path::PathBuf;
let src_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()).join("src");
hlsl_build::update_hlsl_shaders(
&src_dir.join("shader").join("sm_40.hlsl"),
&src_dir.join("data").join("vertex.fx"),
&src_dir.join("data").join("pixel.fx"),
);
}
}
#[cfg(windows)]
mod hlsl_build {
use std::ffi::CString;
use std::fs;
use std::path::Path;
use std::ptr;
use std::slice;
use std::str;
pub fn update_hlsl_shaders(
source_path: &Path,
vertex_destination: &Path,
pixel_destination: &Path,
) {
println!("cargo:rerun-if-changed={}", source_path.display());
let src_data = fs::read_to_string(&source_path).unwrap();
if vertex_destination.exists() {
fs::remove_file(vertex_destination).unwrap();
}
fs::write(
vertex_destination,
compile_shader(&src_data, source_path, "VertexMain", "vs_4_0").unwrap_or_else(
|error_message| {
eprintln!("{}", error_message);
panic!("Vertex shader failed to compile");
},
),
)
.unwrap();
if pixel_destination.exists() {
fs::remove_file(pixel_destination).unwrap();
}
fs::write(
pixel_destination,
compile_shader(&src_data, source_path, "PixelMain", "ps_4_0").unwrap_or_else(
|error_message| {
eprintln!("{}", error_message);
panic!("Pixel shader failed to compile");
},
),
)
.unwrap();
}
fn compile_shader(
src_data: &str,
source_path: &Path,
entry_point: &str,
target: &str,
) -> Result<Vec<u8>, String> {
use winapi::shared::minwindef::LPCVOID;
use winapi::um::d3dcommon::ID3DBlob;
use winapi::um::d3dcompiler;
unsafe {
let mut code: *mut ID3DBlob = ptr::null_mut();
let mut error_msgs: *mut ID3DBlob = ptr::null_mut();
let c_entry_point = CString::new(entry_point).unwrap();
let c_target = CString::new(target).unwrap();
let c_source_path = CString::new(source_path.to_string_lossy().to_string()).unwrap();
let hr = d3dcompiler::D3DCompile(
src_data.as_bytes().as_ptr() as LPCVOID,
src_data.as_bytes().len(),
c_source_path.as_ptr(),
ptr::null(),
ptr::null_mut(),
c_entry_point.as_ptr(),
c_target.as_ptr(),
0,
0,
&mut code,
&mut error_msgs,
);
if hr < 0 {
if !error_msgs.is_null() {
let error_msgs = error_msgs.as_ref().unwrap();
let error_msgs = str::from_utf8(slice::from_raw_parts(
error_msgs.GetBufferPointer() as *const u8,
error_msgs.GetBufferSize(),
))
.expect("error messages from D3DCompile not valid UTF-8");
Err(error_msgs.to_string())
} else {
Err(format!("hresult: {}", hr))
}
} else {
let code = code
.as_ref()
.expect("null code blob returned from D3DCompile");
Ok(slice::from_raw_parts(
code.GetBufferPointer() as *const u8,
code.GetBufferSize(),
)
.to_vec())
}
}
}
}

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imgui-gfx-renderer/src/data/pixel.fx
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imgui-gfx-renderer/src/data/vertex.fx
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imgui-gfx-renderer/src/lib.rs
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#[macro_use]
pub extern crate gfx;
pub extern crate imgui;
use gfx::format::BlendFormat;
use gfx::handle::{Buffer, RenderTargetView};
use gfx::memory::Bind;
use gfx::pso::PipelineState;
use gfx::texture::{FilterMethod, SamplerInfo, WrapMode};
use gfx::traits::FactoryExt;
use gfx::{CommandBuffer, Encoder, Factory, IntoIndexBuffer, Rect, Resources, Slice};
use imgui::internal::RawWrapper;
use imgui::{BackendFlags, DrawCmd, DrawCmdParams, DrawData, DrawIdx, TextureId, Textures};
use std::error::Error;
use std::fmt;
use std::usize;
#[derive(Clone, Debug)]
pub enum RendererError {
Update(gfx::UpdateError<usize>),
Buffer(gfx::buffer::CreationError),
Pipeline(gfx::PipelineStateError<String>),
Combined(gfx::CombinedError),
BadTexture(TextureId),
}
impl fmt::Display for RendererError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::RendererError::*;
match *self {
Update(ref e) => write!(f, "{}", e),
Buffer(ref e) => write!(f, "{}", e),
Pipeline(ref e) => write!(f, "{}", e),
Combined(ref e) => write!(f, "{}", e),
BadTexture(ref t) => write!(f, "Bad texture ID: {}", t.id()),
}
}
}
impl Error for RendererError {
fn source(&self) -> Option<&(dyn Error + 'static)> {
use self::RendererError::*;
match *self {
Update(ref e) => Some(e),
Buffer(ref e) => Some(e),
Pipeline(ref e) => Some(e),
Combined(ref e) => Some(e),
BadTexture(_) => None,
}
}
}
impl From<gfx::UpdateError<usize>> for RendererError {
fn from(e: gfx::UpdateError<usize>) -> RendererError {
RendererError::Update(e)
}
}
impl From<gfx::buffer::CreationError> for RendererError {
fn from(e: gfx::buffer::CreationError) -> RendererError {
RendererError::Buffer(e)
}
}
impl From<gfx::PipelineStateError<String>> for RendererError {
fn from(e: gfx::PipelineStateError<String>) -> RendererError {
RendererError::Pipeline(e)
}
}
impl From<gfx::CombinedError> for RendererError {
fn from(e: gfx::CombinedError) -> RendererError {
RendererError::Combined(e)
}
}
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub enum Shaders {
/// OpenGL 4.0+
GlSl400,
/// OpenGL 3.2+
GlSl150,
/// OpenGL 3.0+
GlSl130,
/// OpenGL 2.0+
GlSl110,
/// OpenGL ES 3.0+
GlSlEs300,
/// OpenGL ES 2.0+
GlSlEs100,
/// HLSL Shader Model 4.0+
HlslSm40,
}
impl Shaders {
fn get_program_code(self) -> (&'static [u8], &'static [u8]) {
use self::Shaders::*;
match self {
GlSl400 => (
include_bytes!("shader/glsl_400.vert"),
include_bytes!("shader/glsl_400.frag"),
),
GlSl150 => (
include_bytes!("shader/glsl_150.vert"),
include_bytes!("shader/glsl_150.frag"),
),
GlSl130 => (
include_bytes!("shader/glsl_130.vert"),
include_bytes!("shader/glsl_130.frag"),
),
GlSl110 => (
include_bytes!("shader/glsl_110.vert"),
include_bytes!("shader/glsl_110.frag"),
),
GlSlEs300 => (
include_bytes!("shader/glsles_300.vert"),
include_bytes!("shader/glsles_300.frag"),
),
GlSlEs100 => (
include_bytes!("shader/glsles_100.vert"),
include_bytes!("shader/glsles_100.frag"),
),
HlslSm40 => (
include_bytes!("data/vertex.fx"),
include_bytes!("data/pixel.fx"),
),
}
}
}
pub type Texture<R> = (
gfx::handle::ShaderResourceView<R, [f32; 4]>,
gfx::handle::Sampler<R>,
);
pub struct Renderer<Cf: BlendFormat, R: Resources> {
vertex_buffer: Buffer<R, GfxDrawVert>,
index_buffer: Buffer<R, DrawIdx>,
slice: Slice<R>,
pso: PipelineState<R, pipeline::Meta<Cf>>,
font_texture: Texture<R>,
textures: Textures<Texture<R>>,
#[cfg(feature = "directx")]
constants: Buffer<R, constants::Constants>,
}
impl<Cf, R> Renderer<Cf, R>
where
Cf: BlendFormat,
R: Resources,
{
pub fn init<F: Factory<R>>(
ctx: &mut imgui::Context,
factory: &mut F,
shaders: Shaders,
) -> Result<Renderer<Cf, R>, RendererError> {
let (vs_code, ps_code) = shaders.get_program_code();
let pso = factory.create_pipeline_simple(vs_code, ps_code, pipeline::new::<Cf>())?;
let vertex_buffer = factory.create_buffer::<GfxDrawVert>(
256,
gfx::buffer::Role::Vertex,
gfx::memory::Usage::Dynamic,
Bind::empty(),
)?;
let index_buffer = factory.create_buffer::<DrawIdx>(
256,
gfx::buffer::Role::Index,
gfx::memory::Usage::Dynamic,
Bind::empty(),
)?;
let font_texture = upload_font_texture(ctx.fonts(), factory)?;
let slice = Slice {
start: 0,
end: 0,
base_vertex: 0,
instances: None,
buffer: index_buffer.clone().into_index_buffer(factory),
};
ctx.set_renderer_name(Some(format!(
"imgui-gfx-renderer {}",
env!("CARGO_PKG_VERSION")
)));
ctx.io_mut()
.backend_flags
.insert(BackendFlags::RENDERER_HAS_VTX_OFFSET);
Ok(Renderer {
vertex_buffer,
index_buffer,
slice,
pso,
font_texture,
textures: Textures::new(),
#[cfg(feature = "directx")]
constants: factory.create_constant_buffer(1),
})
}
pub fn reload_font_texture<F: Factory<R>>(
&mut self,
ctx: &mut imgui::Context,
factory: &mut F,
) -> Result<(), RendererError> {
self.font_texture = upload_font_texture(ctx.fonts(), factory)?;
Ok(())
}
pub fn textures(&mut self) -> &mut Textures<Texture<R>> {
&mut self.textures
}
pub fn render<F: Factory<R>, C: CommandBuffer<R>>(
&mut self,
factory: &mut F,
encoder: &mut Encoder<R, C>,
target: &mut RenderTargetView<R, Cf>,
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 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() {
self.upload_vertex_buffer(factory, encoder, unsafe {
draw_list.transmute_vtx_buffer::<GfxDrawVert>()
})?;
self.upload_index_buffer(factory, encoder, draw_list.idx_buffer())?;
self.slice.start = 0;
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],
];
self.slice.start = idx_offset as u32;
self.slice.end = self.slice.start + count as u32;
self.slice.base_vertex = vtx_offset as u32;
if clip_rect[0] < fb_width
&& clip_rect[1] < fb_height
&& clip_rect[2] >= 0.0
&& clip_rect[3] >= 0.0
{
let scissor = Rect {
x: f32::max(0.0, clip_rect[0]).floor() as u16,
y: f32::max(0.0, clip_rect[1]).floor() as u16,
w: (clip_rect[2] - clip_rect[0]).abs().ceil() as u16,
h: (clip_rect[3] - clip_rect[1]).abs().ceil() as u16,
};
let tex = self.lookup_texture(texture_id)?;
#[cfg(feature = "directx")]
{
let constants = constants::Constants { matrix };
encoder.update_constant_buffer(&self.constants, &constants);
}
let data = pipeline::Data {
vertex_buffer: &self.vertex_buffer,
#[cfg(not(feature = "directx"))]
matrix: &matrix,
#[cfg(feature = "directx")]
constants: &self.constants,
tex,
scissor: &scissor,
target,
};
encoder.draw(&self.slice, &self.pso, &data);
}
}
DrawCmd::ResetRenderState => (), // TODO
DrawCmd::RawCallback { callback, raw_cmd } => unsafe {
callback(draw_list.raw(), raw_cmd)
},
}
}
}
Ok(())
}
fn upload_vertex_buffer<F: Factory<R>, C: CommandBuffer<R>>(
&mut self,
factory: &mut F,
encoder: &mut Encoder<R, C>,
vtx_buffer: &[GfxDrawVert],
) -> Result<(), RendererError> {
if self.vertex_buffer.len() < vtx_buffer.len() {
self.vertex_buffer = factory.create_buffer::<GfxDrawVert>(
vtx_buffer.len(),
gfx::buffer::Role::Vertex,
gfx::memory::Usage::Dynamic,
Bind::empty(),
)?;
}
encoder.update_buffer(&self.vertex_buffer, vtx_buffer, 0)?;
Ok(())
}
fn upload_index_buffer<F: Factory<R>, C: CommandBuffer<R>>(
&mut self,
factory: &mut F,
encoder: &mut Encoder<R, C>,
idx_buffer: &[DrawIdx],
) -> Result<(), RendererError> {
if self.index_buffer.len() < idx_buffer.len() {
self.index_buffer = factory.create_buffer::<DrawIdx>(
idx_buffer.len(),
gfx::buffer::Role::Index,
gfx::memory::Usage::Dynamic,
Bind::empty(),
)?;
self.slice.buffer = self.index_buffer.clone().into_index_buffer(factory);
}
encoder.update_buffer(&self.index_buffer, idx_buffer, 0)?;
Ok(())
}
fn lookup_texture(&self, texture_id: TextureId) -> Result<&Texture<R>, 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))
}
}
}
fn upload_font_texture<R: Resources, F: Factory<R>>(
mut fonts: imgui::FontAtlasRefMut,
factory: &mut F,
) -> Result<Texture<R>, RendererError> {
let texture = fonts.build_rgba32_texture();
let (_, texture_view) = factory.create_texture_immutable_u8::<gfx::format::Srgba8>(
gfx::texture::Kind::D2(
texture.width as u16,
texture.height as u16,
gfx::texture::AaMode::Single,
),
gfx::texture::Mipmap::Provided,
&[texture.data],
)?;
fonts.tex_id = TextureId::from(usize::MAX);
let sampler = factory.create_sampler(SamplerInfo::new(FilterMethod::Bilinear, WrapMode::Tile));
let font_texture = (texture_view, sampler);
Ok(font_texture)
}
#[cfg(feature = "directx")]
mod constants {
use gfx::gfx_constant_struct_meta;
use gfx::gfx_impl_struct_meta;
gfx::gfx_constant_struct! {
Constants {
// `matrix` is a reserved keyword in HLSL
matrix: [[f32; 4]; 4] = "matrix_",
}
}
}
// This is basically what gfx_pipeline generates, but with some changes:
//
// * Data struct contains references to avoid copying
// * Everything is parameterized with BlendFormat
// * Pipeline init is specialized for our structs
mod pipeline {
use super::*;
use gfx::format::BlendFormat;
use gfx::handle::Manager;
use gfx::preset::blend;
use gfx::pso::{
AccessInfo, DataBind, DataLink, Descriptor, InitError, PipelineData, PipelineInit,
RawDataSet,
};
use gfx::state::ColorMask;
use gfx::{ProgramInfo, Resources};
#[derive(Clone, Debug, PartialEq)]
pub struct Data<'a, R: Resources, Cf: BlendFormat + 'a> {
pub vertex_buffer: &'a <gfx::VertexBuffer<GfxDrawVert> as DataBind<R>>::Data,
#[cfg(not(feature = "directx"))]
pub matrix: &'a <gfx::Global<[[f32; 4]; 4]> as DataBind<R>>::Data,
#[cfg(feature = "directx")]
pub constants: &'a <gfx::ConstantBuffer<super::constants::Constants> as DataBind<R>>::Data,
pub tex: &'a <gfx::TextureSampler<[f32; 4]> as DataBind<R>>::Data,
pub target: &'a <gfx::BlendTarget<Cf> as DataBind<R>>::Data,
pub scissor: &'a <gfx::Scissor as DataBind<R>>::Data,
}
#[derive(Clone, Debug, Hash, PartialEq)]
pub struct Meta<Cf: BlendFormat> {
vertex_buffer: gfx::VertexBuffer<GfxDrawVert>,
#[cfg(not(feature = "directx"))]
matrix: gfx::Global<[[f32; 4]; 4]>,
#[cfg(feature = "directx")]
constants: gfx::ConstantBuffer<super::constants::Constants>,
tex: gfx::TextureSampler<[f32; 4]>,
target: gfx::BlendTarget<Cf>,
scissor: gfx::Scissor,
}
#[derive(Clone, Debug, PartialEq)]
pub struct Init<'a, Cf: BlendFormat> {
vertex_buffer: <gfx::VertexBuffer<GfxDrawVert> as DataLink<'a>>::Init,
#[cfg(not(feature = "directx"))]
matrix: <gfx::Global<[[f32; 4]; 4]> as DataLink<'a>>::Init,
#[cfg(feature = "directx")]
constants: <gfx::ConstantBuffer<super::constants::Constants> as DataLink<'a>>::Init,
tex: <gfx::TextureSampler<[f32; 4]> as DataLink<'a>>::Init,
target: <gfx::BlendTarget<Cf> as DataLink<'a>>::Init,
scissor: <gfx::Scissor as DataLink<'a>>::Init,
}
impl<'a, Cf: BlendFormat> PipelineInit for Init<'a, Cf> {
type Meta = Meta<Cf>;
fn link_to<'s>(
&self,
desc: &mut Descriptor,
info: &'s ProgramInfo,
) -> Result<Meta<Cf>, InitError<&'s str>> {
let mut meta = Meta {
vertex_buffer: DataLink::new(),
#[cfg(not(feature = "directx"))]
matrix: DataLink::new(),
#[cfg(feature = "directx")]
constants: DataLink::new(),
tex: DataLink::new(),
target: DataLink::new(),
scissor: DataLink::new(),
};
if let Some(d) = meta
.vertex_buffer
.link_vertex_buffer(0, &self.vertex_buffer)
{
assert!(meta.vertex_buffer.is_active());
desc.vertex_buffers[0] = Some(d);
}
for at in &info.vertex_attributes {
match meta.vertex_buffer.link_input(at, &self.vertex_buffer) {
Some(Ok(d)) => {
assert!(meta.vertex_buffer.is_active());
desc.attributes[at.slot as usize] = Some(d);
continue;
}
Some(Err(fm)) => return Err(InitError::VertexImport(&at.name, Some(fm))),
None => return Err(InitError::VertexImport(&at.name, None)),
}
}
#[cfg(feature = "directx")]
for cb in &info.constant_buffers {
match meta.constants.link_constant_buffer(cb, &self.constants) {
Some(Ok(d)) => {
assert!(meta.constants.is_active());
desc.constant_buffers[cb.slot as usize] = Some(d);
}
Some(Err(e)) => return Err(InitError::ConstantBuffer(&cb.name, Some(e))),
None => return Err(InitError::ConstantBuffer(&cb.name, None)),
}
}
#[cfg(not(feature = "directx"))]
for gc in &info.globals {
match meta.matrix.link_global_constant(gc, &self.matrix) {
Some(Ok(())) => assert!(meta.matrix.is_active()),
Some(Err(e)) => return Err(InitError::GlobalConstant(&gc.name, Some(e))),
None => return Err(InitError::GlobalConstant(&gc.name, None)),
}
}
for srv in &info.textures {
match meta.tex.link_resource_view(srv, &self.tex) {
Some(Ok(d)) => {
assert!(meta.tex.is_active());
desc.resource_views[srv.slot as usize] = Some(d);
}
Some(Err(_)) => return Err(InitError::ResourceView(&srv.name, Some(()))),
None => return Err(InitError::ResourceView(&srv.name, None)),
}
}
for sm in &info.samplers {
match meta.tex.link_sampler(sm, &self.tex) {
Some(d) => {
assert!(meta.tex.is_active());
desc.samplers[sm.slot as usize] = Some(d);
}
None => return Err(InitError::Sampler(&sm.name, None)),
}
}
for out in &info.outputs {
match meta.target.link_output(out, &self.target) {
Some(Ok(d)) => {
assert!(meta.target.is_active());
desc.color_targets[out.slot as usize] = Some(d);
}
Some(Err(fm)) => return Err(InitError::PixelExport(&out.name, Some(fm))),
None => return Err(InitError::PixelExport(&out.name, None)),
}
}
if !info.knows_outputs {
use gfx::shade::core::*;
let mut out = OutputVar {
name: String::new(),
slot: 0,
base_type: BaseType::F32,
container: ContainerType::Vector(4),
};
match meta.target.link_output(&out, &self.target) {
Some(Ok(d)) => {
assert!(meta.target.is_active());
desc.color_targets[out.slot as usize] = Some(d);
out.slot += 1;
}
Some(Err(fm)) => return Err(InitError::PixelExport("!known", Some(fm))),
None => (),
}
}
if meta.scissor.link_scissor() {
assert!(meta.scissor.is_active());
desc.scissor = true;
}
Ok(meta)
}
}
impl<'a, R: Resources, Cf: BlendFormat> PipelineData<R> for Data<'a, R, Cf> {
type Meta = Meta<Cf>;
fn bake_to(
&self,
out: &mut RawDataSet<R>,
meta: &Meta<Cf>,
man: &mut Manager<R>,
access: &mut AccessInfo<R>,
) {
meta.vertex_buffer
.bind_to(out, self.vertex_buffer, man, access);
#[cfg(not(feature = "directx"))]
{
meta.matrix.bind_to(out, self.matrix, man, access);
}
#[cfg(feature = "directx")]
{
meta.constants.bind_to(out, self.constants, man, access);
}
meta.tex.bind_to(out, self.tex, man, access);
meta.target.bind_to(out, self.target, man, access);
meta.scissor.bind_to(out, self.scissor, man, access);
}
}
pub fn new<Cf: BlendFormat>() -> Init<'static, Cf> {
Init {
vertex_buffer: (),
#[cfg(not(feature = "directx"))]
matrix: "matrix",
#[cfg(feature = "directx")]
constants: "Constants",
tex: "tex",
target: ("Target0", ColorMask::all(), blend::ALPHA),
scissor: (),
}
}
}
gfx_vertex_struct! {
GfxDrawVert {
pos: [f32; 2] = "pos",
uv: [f32; 2] = "uv",
col: [gfx::format::U8Norm; 4] = "col",
}
}

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imgui-gfx-renderer/src/shader/glsl_110.frag
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#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);
}

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imgui-gfx-renderer/src/shader/glsl_110.vert
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@ -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;
gl_Position = matrix * vec4(pos.xy, 0, 1);
}

12
imgui-gfx-renderer/src/shader/glsl_130.frag
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@ -1,12 +0,0 @@
#version 130
uniform sampler2D tex;
in vec2 f_uv;
in vec4 f_color;
out vec4 Target0;
void main() {
Target0 = f_color * texture(tex, f_uv.st);
}

19
imgui-gfx-renderer/src/shader/glsl_130.vert
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@ -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;
gl_Position = matrix * vec4(pos.xy, 0, 1);
}

12
imgui-gfx-renderer/src/shader/glsl_150.frag
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@ -1,12 +0,0 @@
#version 150
uniform sampler2D tex;
in vec2 f_uv;
in vec4 f_color;
out vec4 Target0;
void main() {
Target0 = f_color * texture(tex, f_uv.st);
}

19
imgui-gfx-renderer/src/shader/glsl_150.vert
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@ -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;
gl_Position = matrix * vec4(pos.xy, 0, 1);
}

12
imgui-gfx-renderer/src/shader/glsl_400.frag
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@ -1,12 +0,0 @@
#version 400
uniform sampler2D tex;
in vec2 f_uv;
in vec4 f_color;
out vec4 Target0;
void main() {
Target0 = f_color * texture(tex, f_uv.st);
}

19
imgui-gfx-renderer/src/shader/glsl_400.vert
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@ -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;
gl_Position = matrix * vec4(pos.xy, 0, 1);
}

13
imgui-gfx-renderer/src/shader/glsles_100.frag
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@ -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-gfx-renderer/src/shader/glsles_100.vert
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@ -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;
gl_Position = matrix * vec4(pos.xy, 0, 1);
}

12
imgui-gfx-renderer/src/shader/glsles_300.frag
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@ -1,12 +0,0 @@
#version 300 es
uniform sampler2D tex;
in mediump vec2 f_uv;
in lowp vec4 f_color;
out lowp vec4 Target0;
void main() {
Target0 = f_color * texture(tex, f_uv.st);
}

19
imgui-gfx-renderer/src/shader/glsles_300.vert
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@ -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;
gl_Position = matrix * vec4(pos.xy, 0, 1);
}

34
imgui-gfx-renderer/src/shader/sm_40.hlsl
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@ -1,34 +0,0 @@
cbuffer Constants : register(b0) {
float4x4 matrix_;
}
Texture2D tex;
SamplerState tex_;
struct VIn {
float2 position : pos;
float2 uv : uv;
float4 color : col;
};
struct VOut
{
float4 position : SV_POSITION;
float2 uv : TEXCOORD0;
float4 color : COLOR;
};
VOut VertexMain(VIn vertex)
{
VOut output;
output.position = mul(matrix_, float4(vertex.position, 0.0, 1.0));
output.uv = vertex.uv;
output.color = vertex.color;
return output;
}
float4 PixelMain(VOut vout) : SV_TARGET
{
return vout.color * tex.Sample(tex_, vout.uv);
}