vulkano/examples/src/bin/image/main.rs

// Copyright (c) 2016 The vulkano developers
// Licensed under the Apache License, Version 2.0
// <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT
// license <LICENSE-MIT or http://opensource.org/licenses/MIT>,
// at your option. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.

extern crate cgmath;
extern crate image;
extern crate winit;

#[macro_use]
extern crate vulkano;
extern crate vulkano_shaders;
extern crate vulkano_win;

use vulkano_win::VkSurfaceBuild;
use vulkano::sync::GpuFuture;
use vulkano_shaders::vulkano_shader;

use std::sync::Arc;

fn main() {
    // The start of this example is exactly the same as `triangle`. You should read the
    // `triangle` example if you haven't done so yet.

    let extensions = vulkano_win::required_extensions();
    let instance = vulkano::instance::Instance::new(None, &extensions, None).expect("failed to create instance");

    let physical = vulkano::instance::PhysicalDevice::enumerate(&instance)
                            .next().expect("no device available");
    println!("Using device: {} (type: {:?})", physical.name(), physical.ty());

    let mut events_loop = winit::EventsLoop::new();
    let surface = winit::WindowBuilder::new().build_vk_surface(&events_loop, instance.clone()).unwrap();

    let mut dimensions;

    let queue_family = physical.queue_families().find(|&q| q.supports_graphics() &&
                                                   surface.is_supported(q).unwrap_or(false))
                                                .expect("couldn't find a graphical queue family");

    let device_ext = vulkano::device::DeviceExtensions {
        khr_swapchain: true,
        .. vulkano::device::DeviceExtensions::none()
    };
    let (device, mut queues) = vulkano::device::Device::new(physical, physical.supported_features(),
                                                            &device_ext, [(queue_family, 0.5)].iter().cloned())
                               .expect("failed to create device");
    let queue = queues.next().unwrap();

    let (mut swapchain, mut images) = {
        let caps = surface.capabilities(physical).expect("failed to get surface capabilities");

        dimensions = caps.current_extent.unwrap_or([1024, 768]);
        let usage = caps.supported_usage_flags;
        let alpha = caps.supported_composite_alpha.iter().next().unwrap();
        let format = caps.supported_formats[0].0;

        vulkano::swapchain::Swapchain::new(device.clone(), surface.clone(), caps.min_image_count,
                                           format, dimensions, 1,
                                           usage, &queue, vulkano::swapchain::SurfaceTransform::Identity,
                                           alpha,
                                           vulkano::swapchain::PresentMode::Fifo, true, None).expect("failed to create swapchain")
    };


    #[derive(Debug, Clone)]
    struct Vertex { position: [f32; 2] }
    impl_vertex!(Vertex, position);

    let vertex_buffer = vulkano::buffer::cpu_access::CpuAccessibleBuffer::<[Vertex]>
                               ::from_iter(device.clone(), vulkano::buffer::BufferUsage::all(),
                                       [
                                           Vertex { position: [-0.5, -0.5 ] },
                                           Vertex { position: [-0.5,  0.5 ] },
                                           Vertex { position: [ 0.5, -0.5 ] },
                                           Vertex { position: [ 0.5,  0.5 ] },
                                       ].iter().cloned()).expect("failed to create buffer");

    let vs = vs::Shader::load(device.clone()).expect("failed to create shader module");
    let fs = fs::Shader::load(device.clone()).expect("failed to create shader module");

    let renderpass = Arc::new(
        single_pass_renderpass!(device.clone(),
            attachments: {
                color: {
                    load: Clear,
                    store: Store,
                    format: swapchain.format(),
                    samples: 1,
                }
            },
            pass: {
                color: [color],
                depth_stencil: {}
            }
        ).unwrap()
    );

    let (texture, tex_future) = {
        let image = image::load_from_memory_with_format(include_bytes!("image_img.png"),
                                                        image::ImageFormat::PNG).unwrap().to_rgba();
        let image_data = image.into_raw().clone();

        vulkano::image::immutable::ImmutableImage::from_iter(
            image_data.iter().cloned(),
            vulkano::image::Dimensions::Dim2d { width: 93, height: 93 },
            vulkano::format::R8G8B8A8Srgb,
            queue.clone()).unwrap()
    };


    let sampler = vulkano::sampler::Sampler::new(device.clone(), vulkano::sampler::Filter::Linear,
                                                 vulkano::sampler::Filter::Linear, vulkano::sampler::MipmapMode::Nearest,
                                                 vulkano::sampler::SamplerAddressMode::Repeat,
                                                 vulkano::sampler::SamplerAddressMode::Repeat,
                                                 vulkano::sampler::SamplerAddressMode::Repeat,
                                                 0.0, 1.0, 0.0, 0.0).unwrap();

    let pipeline = Arc::new(vulkano::pipeline::GraphicsPipeline::start()
        .vertex_input_single_buffer::<Vertex>()
        .vertex_shader(vs.main_entry_point(), ())
        .triangle_strip()
        .viewports_dynamic_scissors_irrelevant(1)
        .fragment_shader(fs.main_entry_point(), ())
        .blend_alpha_blending()
        .render_pass(vulkano::framebuffer::Subpass::from(renderpass.clone(), 0).unwrap())
        .build(device.clone())
        .unwrap());

    let set = Arc::new(vulkano::descriptor::descriptor_set::PersistentDescriptorSet::start(pipeline.clone(), 0)
        .add_sampled_image(texture.clone(), sampler.clone()).unwrap()
        .build().unwrap()
    );

    let mut framebuffers: Option<Vec<Arc<vulkano::framebuffer::Framebuffer<_,_>>>> = None;

    let mut recreate_swapchain = false;

    let mut previous_frame_end = Box::new(tex_future) as Box<GpuFuture>;

    let mut dynamic_state =  vulkano::command_buffer::DynamicState {
        line_width: None,
        viewports: Some(vec![vulkano::pipeline::viewport::Viewport {
            origin: [0.0, 0.0],
            dimensions: [dimensions[0] as f32, dimensions[1] as f32],
            depth_range: 0.0 .. 1.0,
        }]),
        scissors: None,
    };

    loop {
        previous_frame_end.cleanup_finished();
        if recreate_swapchain {

            dimensions = surface.capabilities(physical)
                .expect("failed to get surface capabilities")
                .current_extent.unwrap_or([1024, 768]);

            let (new_swapchain, new_images) = match swapchain.recreate_with_dimension(dimensions) {
                Ok(r) => r,
                Err(vulkano::swapchain::SwapchainCreationError::UnsupportedDimensions) => {
                    continue;
                },
                Err(err) => panic!("{:?}", err)
            };

            swapchain = new_swapchain;
            images = new_images;

            framebuffers = None;

            dynamic_state.viewports = Some(vec![vulkano::pipeline::viewport::Viewport {
                origin: [0.0, 0.0],
                dimensions: [dimensions[0] as f32, dimensions[1] as f32],
                depth_range: 0.0 .. 1.0,
            }]);

            recreate_swapchain = false;
        }

        if framebuffers.is_none() {
            framebuffers = Some(images.iter().map(|image| {
                Arc::new(vulkano::framebuffer::Framebuffer::start(renderpass.clone())
                         .add(image.clone()).unwrap()
                         .build().unwrap())
            }).collect::<Vec<_>>());
        }

        let (image_num, future) = match vulkano::swapchain::acquire_next_image(swapchain.clone(),
                                                                              None) {
            Ok(r) => r,
            Err(vulkano::swapchain::AcquireError::OutOfDate) => {
                recreate_swapchain = true;
                continue;
            },
            Err(err) => panic!("{:?}", err)
        };

        let cb = vulkano::command_buffer::AutoCommandBufferBuilder::primary_one_time_submit(device.clone(), queue.family())
            .unwrap()
            .begin_render_pass(
                framebuffers.as_ref().unwrap()[image_num].clone(), false,
                vec![[0.0, 0.0, 1.0, 1.0].into()]).unwrap()
            .draw(pipeline.clone(),
                  &dynamic_state,
                  vertex_buffer.clone(),
                  set.clone(), ()).unwrap()
            .end_render_pass().unwrap()
            .build().unwrap();

        let future = previous_frame_end.join(future)
            .then_execute(queue.clone(), cb).unwrap()
            .then_swapchain_present(queue.clone(), swapchain.clone(), image_num)
            .then_signal_fence_and_flush();

        match future {
            Ok(future) => {
                previous_frame_end = Box::new(future) as Box<_>;
            }
            Err(vulkano::sync::FlushError::OutOfDate) => {
                recreate_swapchain = true;
                previous_frame_end = Box::new(vulkano::sync::now(device.clone())) as Box<_>;
            }
            Err(e) => {
                println!("{:?}", e);
                previous_frame_end = Box::new(vulkano::sync::now(device.clone())) as Box<_>;
            }
        }

        let mut done = false;
        events_loop.poll_events(|ev| {
            match ev {
                winit::Event::WindowEvent { event: winit::WindowEvent::CloseRequested, .. } => done = true,
                _ => ()
            }
        });
        if done { return; }
    }
}

vulkano_shader!{
    mod_name: vs,
    ty: "vertex",
    src: "
#version 450

layout(location = 0) in vec2 position;
layout(location = 0) out vec2 tex_coords;

void main() {
    gl_Position = vec4(position, 0.0, 1.0);
    tex_coords = position + vec2(0.5);
}"
}

vulkano_shader!{
    mod_name: fs,
    ty: "fragment",
    src: "
#version 450

layout(location = 0) in vec2 tex_coords;
layout(location = 0) out vec4 f_color;

layout(set = 0, binding = 0) uniform sampler2D tex;

void main() {
    f_color = texture(tex, tex_coords);
}"
}