#[path = "../framework.rs"]
mod framework;
#[derive(Clone, Copy)]
struct Vertex {
_pos: [f32; 4],
_tex_coord: [f32; 2],
}
fn vertex(pos: [i8; 3], tc: [i8; 2]) -> Vertex {
Vertex {
_pos: [pos[0] as f32, pos[1] as f32, pos[2] as f32, 1.0],
_tex_coord: [tc[0] as f32, tc[1] as f32],
}
}
fn create_vertices() -> (Vec<Vertex>, Vec<u16>) {
let vertex_data = [
vertex([-1, -1, 1], [0, 0]),
vertex([1, -1, 1], [1, 0]),
vertex([1, 1, 1], [1, 1]),
vertex([-1, 1, 1], [0, 1]),
vertex([-1, 1, -1], [1, 0]),
vertex([1, 1, -1], [0, 0]),
vertex([1, -1, -1], [0, 1]),
vertex([-1, -1, -1], [1, 1]),
vertex([1, -1, -1], [0, 0]),
vertex([1, 1, -1], [1, 0]),
vertex([1, 1, 1], [1, 1]),
vertex([1, -1, 1], [0, 1]),
vertex([-1, -1, 1], [1, 0]),
vertex([-1, 1, 1], [0, 0]),
vertex([-1, 1, -1], [0, 1]),
vertex([-1, -1, -1], [1, 1]),
vertex([1, 1, -1], [1, 0]),
vertex([-1, 1, -1], [0, 0]),
vertex([-1, 1, 1], [0, 1]),
vertex([1, 1, 1], [1, 1]),
vertex([1, -1, 1], [0, 0]),
vertex([-1, -1, 1], [1, 0]),
vertex([-1, -1, -1], [1, 1]),
vertex([1, -1, -1], [0, 1]),
];
let index_data: &[u16] = &[
0, 1, 2, 2, 3, 0, 4, 5, 6, 6, 7, 4, 8, 9, 10, 10, 11, 8, 12, 13, 14, 14, 15, 12, 16, 17, 18, 18, 19, 16, 20, 21, 22, 22, 23, 20, ];
(vertex_data.to_vec(), index_data.to_vec())
}
fn create_texels(size: usize) -> Vec<u8> {
use std::iter;
(0 .. size * size)
.flat_map(|id| {
let cx = 3.0 * (id % size) as f32 / (size - 1) as f32 - 2.0;
let cy = 2.0 * (id / size) as f32 / (size - 1) as f32 - 1.0;
let (mut x, mut y, mut count) = (cx, cy, 0);
while count < 0xFF && x * x + y * y < 4.0 {
let old_x = x;
x = x * x - y * y + cx;
y = 2.0 * old_x * y + cy;
count += 1;
}
iter::once(0xFF - (count * 5) as u8)
.chain(iter::once(0xFF - (count * 15) as u8))
.chain(iter::once(0xFF - (count * 50) as u8))
.chain(iter::once(1))
})
.collect()
}
struct Example {
vertex_buf: wgpu::Buffer,
index_buf: wgpu::Buffer,
index_count: usize,
bind_group: wgpu::BindGroup,
uniform_buf: wgpu::Buffer,
pipeline: wgpu::RenderPipeline,
}
impl Example {
fn generate_matrix(aspect_ratio: f32) -> cgmath::Matrix4<f32> {
let mx_projection = cgmath::perspective(cgmath::Deg(45f32), aspect_ratio, 1.0, 10.0);
let mx_view = cgmath::Matrix4::look_at(
cgmath::Point3::new(1.5f32, -5.0, 3.0),
cgmath::Point3::new(0f32, 0.0, 0.0),
cgmath::Vector3::unit_z(),
);
let mx_correction = framework::OPENGL_TO_WGPU_MATRIX;
mx_correction * mx_projection * mx_view
}
}
impl framework::Example for Example {
fn init(sc_desc: &wgpu::SwapChainDescriptor, device: &mut wgpu::Device) -> Self {
use std::mem;
let mut init_encoder =
device.create_command_encoder(&wgpu::CommandEncoderDescriptor { todo: 0 });
let vertex_size = mem::size_of::<Vertex>();
let (vertex_data, index_data) = create_vertices();
let vertex_buf = device
.create_buffer_mapped(vertex_data.len(), wgpu::BufferUsage::VERTEX)
.fill_from_slice(&vertex_data);
let index_buf = device
.create_buffer_mapped(index_data.len(), wgpu::BufferUsage::INDEX)
.fill_from_slice(&index_data);
let bind_group_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
bindings: &[
wgpu::BindGroupLayoutBinding {
binding: 0,
visibility: wgpu::ShaderStage::VERTEX,
ty: wgpu::BindingType::UniformBuffer {
dynamic: false,
},
},
wgpu::BindGroupLayoutBinding {
binding: 1,
visibility: wgpu::ShaderStage::FRAGMENT,
ty: wgpu::BindingType::SampledTexture {
multisampled: false,
dimension: wgpu::TextureViewDimension::D2,
},
},
wgpu::BindGroupLayoutBinding {
binding: 2,
visibility: wgpu::ShaderStage::FRAGMENT,
ty: wgpu::BindingType::Sampler,
},
],
});
let pipeline_layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
bind_group_layouts: &[&bind_group_layout],
});
let size = 256u32;
let texels = create_texels(size as usize);
let texture_extent = wgpu::Extent3d {
width: size,
height: size,
depth: 1,
};
let texture = device.create_texture(&wgpu::TextureDescriptor {
size: texture_extent,
array_layer_count: 1,
mip_level_count: 1,
sample_count: 1,
dimension: wgpu::TextureDimension::D2,
format: wgpu::TextureFormat::Rgba8UnormSrgb,
usage: wgpu::TextureUsage::SAMPLED | wgpu::TextureUsage::COPY_DST,
});
let texture_view = texture.create_default_view();
let temp_buf = device
.create_buffer_mapped(texels.len(), wgpu::BufferUsage::COPY_SRC)
.fill_from_slice(&texels);
init_encoder.copy_buffer_to_texture(
wgpu::BufferCopyView {
buffer: &temp_buf,
offset: 0,
row_pitch: 4 * size,
image_height: size,
},
wgpu::TextureCopyView {
texture: &texture,
mip_level: 0,
array_layer: 0,
origin: wgpu::Origin3d {
x: 0.0,
y: 0.0,
z: 0.0,
},
},
texture_extent,
);
let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
address_mode_u: wgpu::AddressMode::ClampToEdge,
address_mode_v: wgpu::AddressMode::ClampToEdge,
address_mode_w: wgpu::AddressMode::ClampToEdge,
mag_filter: wgpu::FilterMode::Nearest,
min_filter: wgpu::FilterMode::Linear,
mipmap_filter: wgpu::FilterMode::Nearest,
lod_min_clamp: -100.0,
lod_max_clamp: 100.0,
compare_function: wgpu::CompareFunction::Always,
});
let mx_total = Self::generate_matrix(sc_desc.width as f32 / sc_desc.height as f32);
let mx_ref: &[f32; 16] = mx_total.as_ref();
let uniform_buf = device
.create_buffer_mapped(
16,
wgpu::BufferUsage::UNIFORM | wgpu::BufferUsage::COPY_DST,
)
.fill_from_slice(mx_ref);
let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
layout: &bind_group_layout,
bindings: &[
wgpu::Binding {
binding: 0,
resource: wgpu::BindingResource::Buffer {
buffer: &uniform_buf,
range: 0 .. 64,
},
},
wgpu::Binding {
binding: 1,
resource: wgpu::BindingResource::TextureView(&texture_view),
},
wgpu::Binding {
binding: 2,
resource: wgpu::BindingResource::Sampler(&sampler),
},
],
});
let vs_bytes =
framework::load_glsl(include_str!("shader.vert"), framework::ShaderStage::Vertex);
let fs_bytes = framework::load_glsl(
include_str!("shader.frag"),
framework::ShaderStage::Fragment,
);
let vs_module = device.create_shader_module(&vs_bytes);
let fs_module = device.create_shader_module(&fs_bytes);
let pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
layout: &pipeline_layout,
vertex_stage: wgpu::ProgrammableStageDescriptor {
module: &vs_module,
entry_point: "main",
},
fragment_stage: Some(wgpu::ProgrammableStageDescriptor {
module: &fs_module,
entry_point: "main",
}),
rasterization_state: Some(wgpu::RasterizationStateDescriptor {
front_face: wgpu::FrontFace::Ccw,
cull_mode: wgpu::CullMode::Back,
depth_bias: 0,
depth_bias_slope_scale: 0.0,
depth_bias_clamp: 0.0,
}),
primitive_topology: wgpu::PrimitiveTopology::TriangleList,
color_states: &[wgpu::ColorStateDescriptor {
format: sc_desc.format,
color_blend: wgpu::BlendDescriptor::REPLACE,
alpha_blend: wgpu::BlendDescriptor::REPLACE,
write_mask: wgpu::ColorWrite::ALL,
}],
depth_stencil_state: None,
index_format: wgpu::IndexFormat::Uint16,
vertex_buffers: &[wgpu::VertexBufferDescriptor {
stride: vertex_size as wgpu::BufferAddress,
step_mode: wgpu::InputStepMode::Vertex,
attributes: &[
wgpu::VertexAttributeDescriptor {
format: wgpu::VertexFormat::Float4,
offset: 0,
shader_location: 0,
},
wgpu::VertexAttributeDescriptor {
format: wgpu::VertexFormat::Float2,
offset: 4 * 4,
shader_location: 1,
},
],
}],
sample_count: 1,
sample_mask: !0,
alpha_to_coverage_enabled: false,
});
let init_command_buf = init_encoder.finish();
device.get_queue().submit(&[init_command_buf]);
Example {
vertex_buf,
index_buf,
index_count: index_data.len(),
bind_group,
uniform_buf,
pipeline,
}
}
fn update(&mut self, _event: winit::event::WindowEvent) {
}
fn resize(&mut self, sc_desc: &wgpu::SwapChainDescriptor, device: &mut wgpu::Device) {
let mx_total = Self::generate_matrix(sc_desc.width as f32 / sc_desc.height as f32);
let mx_ref: &[f32; 16] = mx_total.as_ref();
let temp_buf = device
.create_buffer_mapped(16, wgpu::BufferUsage::COPY_SRC)
.fill_from_slice(mx_ref);
let mut encoder =
device.create_command_encoder(&wgpu::CommandEncoderDescriptor { todo: 0 });
encoder.copy_buffer_to_buffer(&temp_buf, 0, &self.uniform_buf, 0, 64);
device.get_queue().submit(&[encoder.finish()]);
}
fn render(&mut self, frame: &wgpu::SwapChainOutput, device: &mut wgpu::Device) {
let mut encoder =
device.create_command_encoder(&wgpu::CommandEncoderDescriptor { todo: 0 });
{
let mut rpass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
color_attachments: &[wgpu::RenderPassColorAttachmentDescriptor {
attachment: &frame.view,
resolve_target: None,
load_op: wgpu::LoadOp::Clear,
store_op: wgpu::StoreOp::Store,
clear_color: wgpu::Color {
r: 0.1,
g: 0.2,
b: 0.3,
a: 1.0,
},
}],
depth_stencil_attachment: None,
});
rpass.set_pipeline(&self.pipeline);
rpass.set_bind_group(0, &self.bind_group, &[]);
rpass.set_index_buffer(&self.index_buf, 0);
rpass.set_vertex_buffers(0, &[(&self.vertex_buf, 0)]);
rpass.draw_indexed(0 .. self.index_count as u32, 0, 0 .. 1);
}
device.get_queue().submit(&[encoder.finish()]);
}
}
fn main() {
framework::run::<Example>("cube");
}