From 68e466bb68ba5e5a748a8e86b6eaedbab400c973 Mon Sep 17 00:00:00 2001
From: Bernie Innocenti <bernie@codewiz.org>
Date: Sat, 22 Apr 2017 18:46:49 -0400
Subject: [PATCH] Switch to WebGL 2.

---
 Cargo.toml |  6 ++++--
 main.rs    | 18 +++++++++++-------
 solid.frag |  7 +++++--
 solid.vert |  6 ++++--
 4 files changed, 24 insertions(+), 13 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 5167759..44b8aec 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,8 +10,8 @@ license = "GPL-3.0+"
 
 [dependencies]
 cgmath = "*"
-glium = "0.15.0"
-glutin = "0.6.2"
+glium = "0.16.0"
+glutin = "0.7.4"
 genmesh = "0.4.1"
 image = "0.12.0"
 obj = { version = "0.5", features = ["usegenmesh"] }
@@ -28,6 +28,8 @@ backtrace = "0.2.3"
 
 [replace]
 "backtrace:0.2.3" = { git = "https://github.com/badboy/backtrace-rs", branch = "emscripten-fix" }
+"glutin:0.7.4" = { path = "/home/bernie/src/glutin" }
+"glium:0.16.0" = { path = "/home/bernie/src/glium" }
 
 [[bin]]
 name = "mandelwow"
diff --git a/main.rs b/main.rs
index d1582dc..c63add0 100644
--- a/main.rs
+++ b/main.rs
@@ -35,6 +35,15 @@ fn screenshot(display : &glium::Display) {
     image.save(&mut output, image::ImageFormat::PNG).unwrap();
 }
 
+fn gl_info(display : &glium::Display) {
+    let version = *display.get_opengl_version();
+    let api = match version {
+        glium::Version(glium::Api::Gl, _, _) => "OpenGL",
+        glium::Version(glium::Api::GlEs, _, _) => "OpenGL ES"
+    };
+    println!("{} context verson: {}", api, display.get_opengl_version_string());
+}
+
 #[allow(non_camel_case_types)]
 type em_callback_func = unsafe extern fn();
 extern {
@@ -63,7 +72,7 @@ fn main() {
     let _soundplayer = sound::start();
 
     let display = glutin::WindowBuilder::new()
-        .with_dimensions(300, 300)
+        .with_dimensions(600, 600)
         //.with_fullscreen(glutin::get_primary_monitor())
         .with_depth_buffer(24)
         .with_vsync()
@@ -71,12 +80,7 @@ fn main() {
         .build_glium()
         .unwrap();
 
-    let version = *display.get_opengl_version();
-    let api = match version {
-        glium::Version(glium::Api::Gl, _, _) => "OpenGL",
-        glium::Version(glium::Api::GlEs, _, _) => "OpenGL ES"
-    };
-    println!("{} context verson: {}", api, display.get_opengl_version_string());
+    gl_info(&display);
 
     let mandelwow_program = mandelwow::program(&display);
     let bounding_box_program = bounding_box::solid_fill_program(&display);
diff --git a/solid.frag b/solid.frag
index c7e5a51..2fed3bf 100644
--- a/solid.frag
+++ b/solid.frag
@@ -1,5 +1,8 @@
-#version 100
+#version 300 es
+precision lowp float;
+
+out vec4 color;
 
 void main() {
-    gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);
+    color = vec4(1.0, 1.0, 1.0, 1.0);
 }
diff --git a/solid.vert b/solid.vert
index e66723f..6dd30a4 100644
--- a/solid.vert
+++ b/solid.vert
@@ -1,5 +1,7 @@
-#version 100
-attribute vec3 position;
+#version 300 es
+precision lowp float;
+
+in vec3 position;
 uniform mat4 perspective;
 uniform mat4 view;
 uniform mat4 model;
-- 
2.25.1