Cargo.toml

[package]
name = "minimal"
version = "0.1.0"

[dependencies]
sdl2-sys = "0.27"
sdl2 = "0.27"
gfx = "0.14"
gfx_core = "*"
gfx_device_gl = "0.12"
gfx_window_sdl = "0.4"

main.rs

#[macro_use]
extern crate gfx;
extern crate gfx_core;
extern crate gfx_device_gl;
extern crate gfx_window_sdl;
extern crate sdl2;

use std::fmt;
use std::path;
use std::collections::BTreeMap;
use std::io::Read;

use sdl2::pixels;
use sdl2::render;
use sdl2::surface;



// This is all placeholder for now just to get us going,
// taken from the instancing example.
const QUAD_VERTICES: [Vertex; 4] = [Vertex { position: [-0.5, 0.5] },
                                    Vertex { position: [-0.5, -0.5] },
                                    Vertex { position: [0.5, -0.5] },
                                    Vertex { position: [0.5, 0.5] }];

const QUAD_INDICES: [u16; 6] = [0, 1, 2, 2, 3, 0];

pub type ColorFormat = gfx::format::Rgba8;
pub type DepthFormat = gfx::format::DepthStencil;

gfx_defines!{
    vertex Vertex {
        position: [f32; 2] = "a_Position",
    }

    // color format: 0xRRGGBBAA
    vertex Instance {
        translate: [f32; 2] = "a_Translate",
        color: u32 = "a_Color",
    }

    constant Locals {
        scale: f32 = "u_Scale",
    }

    pipeline pipe {
        vertex: gfx::VertexBuffer<Vertex> = (),
        instance: gfx::InstanceBuffer<Instance> = (),
        scale: gfx::Global<f32> = "u_Scale",
        locals: gfx::ConstantBuffer<Locals> = "Locals",
        out: gfx::RenderTarget<ColorFormat> = "Target0",
    }
}

// This works fine unless I uncomment color_view or depth_view
pub struct GraphicsContext {
    background: pixels::Color,
    foreground: pixels::Color,
    window: sdl2::video::Window,
    gl_context: sdl2::video::GLContext,
    device: gfx_device_gl::Device,
    factory: gfx_device_gl::Factory,
    //color_view: gfx::handle::RenderTargetView<gfx_device_gl::Resources, gfx::format::Srgba8>,
    //depth_view: gfx::handle::DepthStencilView<gfx_device_gl::Resources, gfx::format::DepthStencil>,
}


// This compiles fine until I try to use it, see new_context2() below
pub struct GraphicsContextGeneric<R, F, C, D> where R: gfx::Resources, F: gfx::Factory<R>, C: gfx::CommandBuffer<R>, D: gfx::Device<Resources=R, CommandBuffer=C> {
    background: pixels::Color,
    foreground: pixels::Color,
    window: sdl2::video::Window,
    gl_context: sdl2::video::GLContext,
    device: Box<D>,
    factory: Box<F>,
    color_view: gfx::handle::RenderTargetView<R, gfx::format::Srgba8>,
    depth_view: gfx::handle::DepthStencilView<R, gfx::format::DepthStencil>,
}

// GL only
pub type GraphicsContext2 = GraphicsContextGeneric<gfx_device_gl::Resources, gfx_device_gl::Factory, gfx_device_gl::CommandBuffer, gfx_device_gl::Device>;


pub fn new_context(video: sdl2::VideoSubsystem, window_title: &str, screen_width: u32, screen_height: u32) -> GraphicsContext {
    let window_builder = &mut video.window(window_title, screen_width, screen_height);
    let (mut window, mut gl_context, mut device, mut factory, color_view, depth_view) =
        gfx_window_sdl::init(window_builder);
    
    GraphicsContext {
        background: pixels::Color::RGB(0u8, 0u8, 255u8),
        foreground: pixels::Color::RGB(255, 255, 255),
        window: window,
        gl_context: gl_context,
        device: device,
        factory: factory,
        //color_view: color_view,
        //depth_view: depth_view,
    }
}


// This gives trait-not-found errors
// pub fn new_context2(video: sdl2::VideoSubsystem, window_title: &str, screen_width: u32, screen_height: u32) -> GraphicsContext2 {
//     let window_builder = &mut video.window(window_title, screen_width, screen_height);
//     let (mut window, mut gl_context, mut device, mut factory, color_view, depth_view) =
//         gfx_window_sdl::init(window_builder);
    
//     GraphicsContext2 {
//         background: pixels::Color::RGB(0u8, 0u8, 255u8),
//         foreground: pixels::Color::RGB(255, 255, 255),
//         window: window,
//         gl_context: gl_context,
//         device: device,
//         factory: factory,
//         color_view: color_view,
//         depth_view: depth_view,
//     }
// }



fn main() {
    println!("Hello world!");
}