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// Copyright (c) 2017 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.
//! This example contains the source code of the fourth part of the guide at http://vulkano.rs.
//!
//! It is not commented, as the explanations can be found in the guide itself.
extern crate image;
#[macro_use]
extern crate vulkano;
#[macro_use]
extern crate vulkano_shader_derive;
use std::sync::Arc;
use image::ImageBuffer;
use image::Rgba;
use vulkano::buffer::BufferUsage;
use vulkano::buffer::CpuAccessibleBuffer;
use vulkano::command_buffer::AutoCommandBufferBuilder;
use vulkano::command_buffer::CommandBuffer;
use vulkano::command_buffer::DynamicState;
use vulkano::device::Device;
use vulkano::device::DeviceExtensions;
use vulkano::format::Format;
use vulkano::framebuffer::Framebuffer;
use vulkano::framebuffer::Subpass;
use vulkano::image::Dimensions;
use vulkano::image::StorageImage;
use vulkano::instance::Features;
use vulkano::instance::Instance;
use vulkano::instance::InstanceExtensions;
use vulkano::instance::PhysicalDevice;
use vulkano::pipeline::GraphicsPipeline;
use vulkano::pipeline::viewport::Viewport;
use vulkano::sync::GpuFuture;
fn main() {
let instance = Instance::new(None, &InstanceExtensions::none(), None)
.expect("failed to create instance");
let physical = PhysicalDevice::enumerate(&instance).next().expect("no device available");
let queue_family = physical.queue_families()
.find(|&q| q.supports_graphics())
.expect("couldn't find a graphical queue family");
let (device, mut queues) = {
Device::new(physical, &Features::none(), &DeviceExtensions::none(),
[(queue_family, 0.5)].iter().cloned()).expect("failed to create device")
};
let queue = queues.next().unwrap();
let image = StorageImage::new(device.clone(), Dimensions::Dim2d { width: 1024, height: 1024 },
Format::R8G8B8A8Unorm, Some(queue.family())).unwrap();
let buf = CpuAccessibleBuffer::from_iter(device.clone(), BufferUsage::all(),
(0 .. 1024 * 1024 * 4).map(|_| 0u8))
.expect("failed to create buffer");
#[derive(Copy, Clone)]
struct Vertex {
position: [f32; 2],
}
impl_vertex!(Vertex, position);
let vertex1 = Vertex { position: [-0.5, -0.5] };
let vertex2 = Vertex { position: [ 0.0, 0.5] };
let vertex3 = Vertex { position: [ 0.5, -0.25] };
let vertex_buffer = CpuAccessibleBuffer::from_iter(device.clone(), BufferUsage::all(),
vec![vertex1, vertex2, vertex3].into_iter()).unwrap();
let render_pass = Arc::new(single_pass_renderpass!(device.clone(),
attachments: {
color: {
load: Clear,
store: Store,
format: Format::R8G8B8A8Unorm,
samples: 1,
}
},
pass: {
color: [color],
depth_stencil: {}
}
).unwrap());
let framebuffer = Arc::new(Framebuffer::start(render_pass.clone())
.add(image.clone()).unwrap()
.build().unwrap());
mod vs {
#[derive(VulkanoShader)]
#[ty = "vertex"]
#[src = "
#version 450
layout(location = 0) in vec2 position;
void main() {
gl_Position = vec4(position, 0.0, 1.0);
}
"]
#[allow(dead_code)]
struct Dummy;
}
mod fs {
#[derive(VulkanoShader)]
#[ty = "fragment"]
#[src = "
#version 450
layout(location = 0) out vec4 f_color;
void main() {
f_color = vec4(1.0, 0.0, 0.0, 1.0);
}
"]
#[allow(dead_code)]
struct Dummy;
}
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 pipeline = Arc::new(GraphicsPipeline::start()
.vertex_input_single_buffer::<Vertex>()
.vertex_shader(vs.main_entry_point(), ())
.viewports_dynamic_scissors_irrelevant(1)
.fragment_shader(fs.main_entry_point(), ())
.render_pass(Subpass::from(render_pass.clone(), 0).unwrap())
.build(device.clone())
.unwrap());
let dynamic_state = DynamicState {
viewports: Some(vec![Viewport {
origin: [0.0, 0.0],
dimensions: [1024.0, 1024.0],
depth_range: 0.0 .. 1.0,
}]),
.. DynamicState::none()
};
let command_buffer = AutoCommandBufferBuilder::primary_one_time_submit(device.clone(), queue.family()).unwrap()
.begin_render_pass(framebuffer.clone(), false, vec![[0.0, 0.0, 1.0, 1.0].into()])
.unwrap()
.draw(pipeline.clone(), &dynamic_state, vertex_buffer.clone(), (), ())
.unwrap()
.end_render_pass()
.unwrap()
.copy_image_to_buffer(image.clone(), buf.clone())
.unwrap()
.build()
.unwrap();
let finished = command_buffer.execute(queue.clone()).unwrap();
finished.then_signal_fence_and_flush().unwrap()
.wait(None).unwrap();
let buffer_content = buf.read().unwrap();
let image = ImageBuffer::<Rgba<u8>, _>::from_raw(1024, 1024, &buffer_content[..]).unwrap();
image.save("image.png").unwrap();
}