From 01862d07ae242b4dab4016a5e279a4946666622b Mon Sep 17 00:00:00 2001 From: Emil Ernerfeldt Date: Tue, 12 Mar 2019 22:59:55 +0100 Subject: [PATCH] Add native glium backend --- Cargo.lock | 658 ++++++++++++++++++++++++++++++++++++++ Cargo.toml | 1 + README.md | 19 +- emigui/src/layout.rs | 14 + example_glium/Cargo.toml | 13 + example_glium/src/main.rs | 277 ++++++++++++++++ 6 files changed, 977 insertions(+), 5 deletions(-) create mode 100644 example_glium/Cargo.toml create mode 100644 example_glium/src/main.rs diff --git a/Cargo.lock b/Cargo.lock index c387eb01..997ae2fa 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -6,6 +6,24 @@ dependencies = [ "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)", ] +[[package]] +name = "andrew" +version = "0.2.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)", + "line_drawing 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)", + "rusttype 0.7.5 (registry+https://github.com/rust-lang/crates.io-index)", + "walkdir 2.2.7 (registry+https://github.com/rust-lang/crates.io-index)", + "xdg 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)", + "xml-rs 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "android_glue" +version = "0.2.3" +source = "registry+https://github.com/rust-lang/crates.io-index" + [[package]] name = "approx" version = "0.3.1" @@ -59,6 +77,16 @@ dependencies = [ "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", ] +[[package]] +name = "bitflags" +version = "1.0.4" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "block" +version = "0.1.6" +source = "registry+https://github.com/rust-lang/crates.io-index" + [[package]] name = "byteorder" version = "1.3.1" @@ -74,6 +102,75 @@ name = "cfg-if" version = "0.1.7" source = "registry+https://github.com/rust-lang/crates.io-index" +[[package]] +name = "cgl" +version = "0.2.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "gleam 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)", + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "cloudabi" +version = "0.0.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "cocoa" +version = "0.18.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)", + "block 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)", + "core-foundation 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)", + "core-graphics 0.17.3 (registry+https://github.com/rust-lang/crates.io-index)", + "foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)", + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", + "objc 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "core-foundation" +version = "0.6.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "core-foundation-sys 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)", + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "core-foundation-sys" +version = "0.6.2" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "core-graphics" +version = "0.17.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)", + "core-foundation 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)", + "foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)", + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "dlib" +version = "0.4.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "libloading 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "downcast-rs" +version = "1.0.3" +source = "registry+https://github.com/rust-lang/crates.io-index" + [[package]] name = "emigui" version = "0.1.0" @@ -118,6 +215,14 @@ dependencies = [ "wasm-bindgen 0.2.38 (registry+https://github.com/rust-lang/crates.io-index)", ] +[[package]] +name = "example_glium" +version = "0.1.0" +dependencies = [ + "emigui 0.1.0", + "glium 0.23.0 (registry+https://github.com/rust-lang/crates.io-index)", +] + [[package]] name = "failure" version = "0.1.5" @@ -138,6 +243,82 @@ dependencies = [ "synstructure 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)", ] +[[package]] +name = "fnv" +version = "1.0.6" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "foreign-types" +version = "0.3.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "foreign-types-shared 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "foreign-types-shared" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "fuchsia-cprng" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "gl_generator" +version = "0.10.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "khronos_api 3.0.0 (registry+https://github.com/rust-lang/crates.io-index)", + "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)", + "xml-rs 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "gleam" +version = "0.6.12" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "gl_generator 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "glium" +version = "0.23.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "backtrace 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)", + "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)", + "gl_generator 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)", + "glutin 0.19.0 (registry+https://github.com/rust-lang/crates.io-index)", + "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)", + "smallvec 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "glutin" +version = "0.19.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "android_glue 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)", + "cgl 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)", + "cocoa 0.18.4 (registry+https://github.com/rust-lang/crates.io-index)", + "core-foundation 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)", + "core-graphics 0.17.3 (registry+https://github.com/rust-lang/crates.io-index)", + "gl_generator 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)", + "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)", + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", + "objc 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)", + "osmesa-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)", + "shared_library 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)", + "wayland-client 0.21.11 (registry+https://github.com/rust-lang/crates.io-index)", + "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)", + "winit 0.18.1 (registry+https://github.com/rust-lang/crates.io-index)", + "x11-dl 2.18.3 (registry+https://github.com/rust-lang/crates.io-index)", +] + [[package]] name = "heck" version = "0.3.1" @@ -167,6 +348,11 @@ dependencies = [ "wasm-bindgen 0.2.38 (registry+https://github.com/rust-lang/crates.io-index)", ] +[[package]] +name = "khronos_api" +version = "3.0.0" +source = "registry+https://github.com/rust-lang/crates.io-index" + [[package]] name = "lazy_static" version = "1.3.0" @@ -177,6 +363,32 @@ name = "libc" version = "0.2.50" source = "registry+https://github.com/rust-lang/crates.io-index" +[[package]] +name = "libloading" +version = "0.5.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "cc 1.0.30 (registry+https://github.com/rust-lang/crates.io-index)", + "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "line_drawing" +version = "0.7.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "lock_api" +version = "0.1.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "owning_ref 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)", + "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)", +] + [[package]] name = "log" version = "0.4.6" @@ -185,11 +397,52 @@ dependencies = [ "cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)", ] +[[package]] +name = "malloc_buf" +version = "0.0.6" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", +] + [[package]] name = "memchr" version = "2.2.0" source = "registry+https://github.com/rust-lang/crates.io-index" +[[package]] +name = "memmap" +version = "0.7.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", + "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "nix" +version = "0.12.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)", + "cc 1.0.30 (registry+https://github.com/rust-lang/crates.io-index)", + "cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)", + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", + "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "nix" +version = "0.13.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)", + "cc 1.0.30 (registry+https://github.com/rust-lang/crates.io-index)", + "cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)", + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", + "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)", +] + [[package]] name = "nodrop" version = "0.1.13" @@ -209,6 +462,14 @@ name = "num-traits" version = "0.2.6" source = "registry+https://github.com/rust-lang/crates.io-index" +[[package]] +name = "objc" +version = "0.2.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "malloc_buf 0.0.6 (registry+https://github.com/rust-lang/crates.io-index)", +] + [[package]] name = "ordered-float" version = "1.0.1" @@ -217,6 +478,53 @@ dependencies = [ "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)", ] +[[package]] +name = "osmesa-sys" +version = "0.1.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "shared_library 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "owning_ref" +version = "0.4.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "parking_lot" +version = "0.7.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "lock_api 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)", + "parking_lot_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "parking_lot_core" +version = "0.4.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", + "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)", + "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)", + "smallvec 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)", + "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "percent-encoding" +version = "1.0.1" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "pkg-config" +version = "0.3.14" +source = "registry+https://github.com/rust-lang/crates.io-index" + [[package]] name = "proc-macro2" version = "0.4.27" @@ -238,6 +546,110 @@ dependencies = [ "proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)", ] +[[package]] +name = "rand" +version = "0.6.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)", + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", + "rand_chacha 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)", + "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)", + "rand_hc 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)", + "rand_isaac 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)", + "rand_jitter 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)", + "rand_os 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)", + "rand_pcg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)", + "rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)", + "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "rand_chacha" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)", + "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "rand_core" +version = "0.3.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "rand_core" +version = "0.4.0" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "rand_hc" +version = "0.1.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "rand_isaac" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "rand_jitter" +version = "0.1.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", + "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)", + "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "rand_os" +version = "0.1.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)", + "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)", + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", + "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)", + "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)", + "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "rand_pcg" +version = "0.1.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)", + "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "rand_xorshift" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "rdrand" +version = "0.4.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)", +] + [[package]] name = "redox_syscall" version = "0.1.51" @@ -276,6 +688,14 @@ name = "rustc-demangle" version = "0.1.13" source = "registry+https://github.com/rust-lang/crates.io-index" +[[package]] +name = "rustc_version" +version = "0.2.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)", +] + [[package]] name = "rusttype" version = "0.7.5" @@ -292,6 +712,32 @@ name = "ryu" version = "0.2.7" source = "registry+https://github.com/rust-lang/crates.io-index" +[[package]] +name = "same-file" +version = "1.0.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "scopeguard" +version = "0.3.3" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "semver" +version = "0.9.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "semver-parser" +version = "0.7.0" +source = "registry+https://github.com/rust-lang/crates.io-index" + [[package]] name = "serde" version = "1.0.89" @@ -317,11 +763,46 @@ dependencies = [ "serde 1.0.89 (registry+https://github.com/rust-lang/crates.io-index)", ] +[[package]] +name = "shared_library" +version = "0.1.9" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)", + "libc 0.2.50 (registry+https://github.com/rust-lang/crates.io-index)", +] + 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a/Cargo.toml b/Cargo.toml index 94ad9b7e..58ce780d 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -3,6 +3,7 @@ members = [ "emigui", "emigui_wasm", "example", + "example_glium", ] # Optimize for small code size: diff --git a/README.md b/README.md index 7653a9d7..c8e09b16 100644 --- a/README.md +++ b/README.md @@ -1,11 +1,11 @@ # Emigui (Experimental, Modularized Immediate mode Graphical User Interface) -An immediate mode GUI library written in Rust. Compiles to WASM. +An immediate mode GUI library written in Rust. For web apps or native apps. ## Goals: * Easy to use -* Platform independent (the same code should run on web and native) +* Platform independent (the same code works on the web and as a native app) * Responsive ## How it works: @@ -13,7 +13,16 @@ Loop: * Gather input: mouse, touches, screen size, ... * Run application code (Immediate Mode GUI) * Output is a triangle mesh -* Render with WebGL +* Render with e.g. OpenGL + +## Available backends: +Wherever you can render textured triangles you can use Emigui. + +Currently two backends have been tested: +* WebAssembly (emigui_wasm) for making a web app +* [Glium](https://github.com/glium/glium) for native apps (see example_glium). + +The same application code can thus be compiled to either into a native app or a web app. ## Demos [Emigui feature demo](https://emilk.github.io/emigui/index.html), source: https://github.com/emilk/emigui/blob/master/example/src/app.rs @@ -33,8 +42,8 @@ Features: * Anti-aliased rendering of circles, rounded rectangles and lines. ## Roadmap: -* Native backend -* Some examples / documentation +* Turn the [Glium](https://github.com/glium/glium) backend into a library +* Some examples and documentation * Text input ## Inspiration diff --git a/emigui/src/layout.rs b/emigui/src/layout.rs index 0d9c75de..e1101f0e 100644 --- a/emigui/src/layout.rs +++ b/emigui/src/layout.rs @@ -419,6 +419,20 @@ impl Region { self.reserve_space_without_padding(indent + size); } + /// A left-aligned column on the left + pub fn left_column(&mut self, width: f32) -> Region { + Region { + data: self.data.clone(), + style: self.style, + id: self.id, + dir: self.dir, + cursor: self.cursor, + align: Align::Min, + bounding_size: vec2(0.0, 0.0), + available_space: vec2(width, self.available_space.y), + } + } + /// A horizontally centered region of the given width. pub fn centered_column(&mut self, width: f32, align: Align) -> Region { Region { diff --git a/example_glium/Cargo.toml b/example_glium/Cargo.toml new file mode 100644 index 00000000..86248377 --- /dev/null +++ b/example_glium/Cargo.toml @@ -0,0 +1,13 @@ +[package] +name = "example_glium" +version = "0.1.0" +authors = ["Emil Ernerfeldt "] +edition = "2018" + +[dependencies] +emigui = { path = "../emigui" } +# gl = "0.11.0" +# glutin = "0.20" +# winit = "0.19.0" +glium = "0.23" + diff --git a/example_glium/src/main.rs b/example_glium/src/main.rs new file mode 100644 index 00000000..758ad42d --- /dev/null +++ b/example_glium/src/main.rs @@ -0,0 +1,277 @@ +// #![deny(warnings)] + +use { + emigui::{ + label, + math::vec2, + widgets::{Button, Label}, + Emigui, Mesh, + }, + glium::{glutin, implement_vertex, index::PrimitiveType, program, texture, uniform, Surface}, +}; + +struct Painter { + program: glium::Program, + texture: texture::texture2d::Texture2d, + current_texture_id: Option, +} + +impl Painter { + fn new(facade: &glium::backend::Facade) -> Painter { + let program = program!(facade, + 140 => { + vertex: " + #version 140 + uniform vec2 u_screen_size; + uniform vec2 u_tex_size; + in vec2 a_pos; + in vec4 a_color; + in vec2 a_tc; + out vec4 v_color; + out vec2 v_tc; + void main() { + gl_Position = vec4( + 2.0 * a_pos.x / u_screen_size.x - 1.0, + 1.0 - 2.0 * a_pos.y / u_screen_size.y, + 0.0, + 1.0); + v_color = a_color / 255.0; + v_tc = a_tc / u_tex_size; + } + ", + + fragment: " + #version 140 + uniform sampler2D u_sampler; + in vec4 v_color; + in vec2 v_tc; + out vec4 f_color; + void main() { + f_color = v_color; + f_color.a *= texture(u_sampler, v_tc).r; + } + " + }, + + 110 => { + vertex: " + #version 110 + uniform vec2 u_screen_size; + uniform vec2 u_tex_size; + attribute vec2 a_pos; + attribute vec4 a_color; + attribute vec2 a_tc; + varying vec4 v_color; + varying vec2 v_tc; + void main() { + gl_Position = vec4( + 2.0 * a_pos.x / u_screen_size.x - 1.0, + 1.0 - 2.0 * a_pos.y / u_screen_size.y, + 0.0, + 1.0); + v_color = a_color / 255.0; + v_tc = a_tc / u_tex_size; + } + ", + + fragment: " + #version 110 + uniform sampler2D u_sampler; + varying vec4 v_color; + varying vec2 v_tc; + void main() { + gl_FragColor = v_color; + gl_FragColor.a *= texture2D(u_sampler, v_tc).r; + } + ", + }, + + 100 => { + vertex: " + #version 100 + uniform mediump vec2 u_screen_size; + uniform mediump vec2 u_tex_size; + attribute mediump vec2 a_pos; + attribute mediump vec4 a_color; + attribute mediump vec2 a_tc; + varying mediump vec4 v_color; + varying mediump vec2 v_tc; + void main() { + gl_Position = vec4( + 2.0 * a_pos.x / u_screen_size.x - 1.0, + 1.0 - 2.0 * a_pos.y / u_screen_size.y, + 0.0, + 1.0); + v_color = a_color / 255.0; + v_tc = a_tc / u_tex_size; + } + ", + + fragment: " + #version 100 + uniform sampler2D u_sampler; + varying mediump vec4 v_color; + varying mediump vec2 v_tc; + void main() { + gl_FragColor = v_color; + gl_FragColor.a *= texture2D(u_sampler, v_tc).r; + } + ", + }, + ) + .unwrap(); + + let pixels = vec![vec![255u8, 0u8], vec![0u8, 255u8]]; + let format = texture::UncompressedFloatFormat::U8; + let mipmaps = texture::MipmapsOption::NoMipmap; + let texture = + texture::texture2d::Texture2d::with_format(facade, pixels, format, mipmaps).unwrap(); + + Painter { + program, + texture, + current_texture_id: None, + } + } + + fn upload_texture(&mut self, facade: &glium::backend::Facade, texture: &emigui::Texture) { + if self.current_texture_id == Some(texture.id) { + return; // No change + } + + let pixels: Vec> = texture + .pixels + .chunks(texture.width as usize) + .map(|row| row.to_vec()) + .collect(); + + let format = texture::UncompressedFloatFormat::U8; + let mipmaps = texture::MipmapsOption::NoMipmap; + self.texture = + texture::texture2d::Texture2d::with_format(facade, pixels, format, mipmaps).unwrap(); + self.current_texture_id = Some(texture.id); + } + + fn paint(&mut self, display: &glium::Display, mesh: Mesh, texture: &emigui::Texture) { + self.upload_texture(display, texture); + + let vertex_buffer = { + #[derive(Copy, Clone)] + struct Vertex { + a_pos: [f32; 2], + a_color: [u8; 4], + a_tc: [u16; 2], + } + implement_vertex!(Vertex, a_pos, a_color, a_tc); + + let vertices: Vec = mesh + .vertices + .iter() + .map(|v| Vertex { + a_pos: [v.pos.x, v.pos.y], + a_color: [v.color.r, v.color.g, v.color.b, v.color.a], + a_tc: [v.uv.0, v.uv.1], + }) + .collect(); + + glium::VertexBuffer::new(display, &vertices).unwrap() + }; + + let indices: Vec = mesh.indices.iter().map(|idx| *idx as u16).collect(); + + let index_buffer = + glium::IndexBuffer::new(display, PrimitiveType::TrianglesList, &indices).unwrap(); + + let (width, height) = display.get_framebuffer_dimensions(); + + let uniforms = uniform! { + u_screen_size: [width as f32, height as f32], + u_tex_size: [texture.width as f32, texture.height as f32], + u_sampler: &self.texture, + }; + + let params = glium::DrawParameters { + blend: glium::Blend::alpha_blending(), + ..Default::default() + }; + + let mut target = display.draw(); + target.clear_color(0.0, 0.0, 0.0, 0.0); + target + .draw( + &vertex_buffer, + &index_buffer, + &self.program, + &uniforms, + ¶ms, + ) + .unwrap(); + target.finish().unwrap(); + } +} + +fn main() { + let mut events_loop = glutin::EventsLoop::new(); + let window = glutin::WindowBuilder::new().with_title("Emigui example"); + let context = glutin::ContextBuilder::new(); + let display = glium::Display::new(window, context, &events_loop).unwrap(); + + let pixels_per_point = display.gl_window().get_hidpi_factor() as f32; + + let mut emigui = Emigui::new(pixels_per_point); + let mut painter = Painter::new(&display); + + let mut raw_input = emigui::RawInput { + mouse_down: false, + mouse_pos: None, + screen_size: { + let (width, height) = display.get_framebuffer_dimensions(); + vec2(width as f32, height as f32) + }, + pixels_per_point, + }; + + let mut paint = |raw_input| { + emigui.new_frame(raw_input); + let mut region = emigui.whole_screen_region(); + let mut region = region.left_column(region.width().min(480.0)); + region.add(label!("Emigui!").text_style(emigui::TextStyle::Heading)); + let exit = region.add(Button::new("Quit")).clicked; + emigui.example(&mut region); + let mesh = emigui.paint(); + painter.paint(&display, mesh, emigui.texture()); + exit + }; + + paint(raw_input); + + events_loop.run_forever(|event| { + match event { + glutin::Event::WindowEvent { event, .. } => match event { + glutin::WindowEvent::CloseRequested => return glutin::ControlFlow::Break, + + glutin::WindowEvent::Resized(glutin::dpi::LogicalSize { width, height }) => { + raw_input.screen_size = vec2(width as f32, height as f32); + if paint(raw_input) { + return glutin::ControlFlow::Break; + } + } + glutin::WindowEvent::MouseInput { state, .. } => { + raw_input.mouse_down = state == glutin::ElementState::Pressed; + if paint(raw_input) { + return glutin::ControlFlow::Break; + } + } + glutin::WindowEvent::CursorMoved { position, .. } => { + raw_input.mouse_pos = Some(vec2(position.x as f32, position.y as f32)); + if paint(raw_input) { + return glutin::ControlFlow::Break; + } + } + _ => (), + }, + _ => (), + } + glutin::ControlFlow::Continue + }); +}