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https://github.com/gfx-rs/wgpu.git
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[rs] Mipmapping example
This commit is contained in:
Dzmitry Malyshau
parent
154ed3a9a5
commit
2b047f996b
3
.gitignore
vendored
3
.gitignore
vendored
@ -8,3 +8,6 @@ Cargo.lock
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# These are backup files generated by rustfmt
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**/*.rs.bk
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# Other
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.DS_Store
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@ -24,7 +24,7 @@ gl = ["wgn/gfx-backend-gl"]
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[dependencies]
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#TODO: only depend on the published version
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wgn = { package = "wgpu-native", features = ["local", "window-winit"], git = "https://github.com/gfx-rs/wgpu", rev = "8cc50253c428fb0a9aab3c74639a866465d65272" }
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wgn = { package = "wgpu-native", version = "0.2.6", features = ["local", "window-winit"], git = "https://github.com/gfx-rs/wgpu", rev = "a667d50d01c3df03b8540c523278e111da7fc82a" }
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arrayvec = "0.4"
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[dev-dependencies]
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10
wgpu/examples/mipmap/blit.frag
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10
wgpu/examples/mipmap/blit.frag
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@ -0,0 +1,10 @@
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#version 450
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layout(location = 0) in vec2 v_TexCoord;
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layout(location = 0) out vec4 o_Target;
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layout(set = 0, binding = 0) uniform texture2D t_Color;
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layout(set = 0, binding = 1) uniform sampler s_Color;
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void main() {
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o_Target = textureLod(sampler2D(t_Color, s_Color), v_TexCoord, 0.0);
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}
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15
wgpu/examples/mipmap/blit.vert
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15
wgpu/examples/mipmap/blit.vert
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@ -0,0 +1,15 @@
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#version 450
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layout(location = 0) out vec2 v_TexCoord;
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void main() {
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vec2 tc = vec2(0.0);
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switch(gl_VertexIndex) {
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case 0: tc = vec2(1.0, 0.0); break;
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case 1: tc = vec2(1.0, 1.0); break;
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case 2: tc = vec2(0.0, 0.0); break;
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case 3: tc = vec2(0.0, 1.0); break;
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}
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v_TexCoord = tc;
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gl_Position = vec4(tc * 2.0 - 1.0, 0.5, 1.0);
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}
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12
wgpu/examples/mipmap/draw.frag
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12
wgpu/examples/mipmap/draw.frag
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@ -0,0 +1,12 @@
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#version 450
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layout(location = 0) in vec2 v_TexCoord;
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layout(location = 0) out vec4 o_Target;
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layout(set = 0, binding = 1) uniform texture2D t_Color;
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layout(set = 0, binding = 2) uniform sampler s_Color;
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void main() {
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vec4 tex = texture(sampler2D(t_Color, s_Color), v_TexCoord);
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float mag = length(v_TexCoord-vec2(0.5));
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o_Target = mix(tex, vec4(0.0), mag*mag);
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}
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15
wgpu/examples/mipmap/draw.vert
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15
wgpu/examples/mipmap/draw.vert
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@ -0,0 +1,15 @@
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#version 450
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layout(location = 0) in vec4 a_Pos;
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layout(location = 0) out vec2 v_TexCoord;
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layout(set = 0, binding = 0) uniform Locals {
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mat4 u_Transform;
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};
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void main() {
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v_TexCoord = a_Pos.xy / 10.0;
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gl_Position = u_Transform * a_Pos;
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// convert from -1,1 Z to 0,1
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gl_Position.z = 0.5 * (gl_Position.z + gl_Position.w);
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}
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419
wgpu/examples/mipmap/main.rs
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419
wgpu/examples/mipmap/main.rs
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@ -0,0 +1,419 @@
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#[path = "../framework.rs"]
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mod framework;
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const TEXTURE_FORMAT: wgpu::TextureFormat = wgpu::TextureFormat::R8Unorm;
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#[derive(Clone, Copy)]
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struct Vertex {
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#[allow(dead_code)]
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pos: [f32; 4],
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}
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fn create_vertices() -> Vec<Vertex> {
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vec![
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Vertex {
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pos: [100.0, 0.0, 0.0, 1.0],
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},
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Vertex {
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pos: [100.0, 1000.0, 0.0, 1.0],
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},
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Vertex {
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pos: [-100.0, 0.0, 0.0, 1.0],
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},
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Vertex {
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pos: [-100.0, 1000.0, 0.0, 1.0],
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},
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]
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}
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fn create_texels(size: usize) -> Vec<u8> {
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(0 .. size * size)
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.map(|id| {
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if (id + id / size) % 2 == 1 {
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0xFF
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} else {
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0
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}
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})
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.collect()
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}
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struct Example {
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vertex_buf: wgpu::Buffer,
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bind_group: wgpu::BindGroup,
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uniform_buf: wgpu::Buffer,
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draw_pipeline: wgpu::RenderPipeline,
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}
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impl Example {
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fn generate_matrix(aspect_ratio: f32) -> cgmath::Matrix4<f32> {
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let mx_projection = cgmath::perspective(cgmath::Deg(45f32), aspect_ratio, 1.0, 1000.0);
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let mx_view = cgmath::Matrix4::look_at(
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cgmath::Point3::new(0f32, 0.0, 10.0),
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cgmath::Point3::new(0f32, 100.0, 0.0),
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-cgmath::Vector3::unit_z(),
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);
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mx_projection * mx_view
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}
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fn generate_mipmaps(
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device: &wgpu::Device, texture: &wgpu::Texture, mip_count: u32
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) -> wgpu::CommandBuffer {
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let bind_group_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
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bindings: &[
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wgpu::BindGroupLayoutBinding {
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binding: 0,
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visibility: wgpu::ShaderStage::FRAGMENT,
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ty: wgpu::BindingType::SampledTexture,
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},
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wgpu::BindGroupLayoutBinding {
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binding: 1,
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visibility: wgpu::ShaderStage::FRAGMENT,
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ty: wgpu::BindingType::Sampler,
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},
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],
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});
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let pipeline_layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
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bind_group_layouts: &[&bind_group_layout],
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});
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let vs_bytes = framework::load_glsl(
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include_str!("blit.vert"),
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framework::ShaderStage::Vertex,
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);
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let fs_bytes = framework::load_glsl(
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include_str!("blit.frag"),
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framework::ShaderStage::Fragment,
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);
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let vs_module = device.create_shader_module(&vs_bytes);
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let fs_module = device.create_shader_module(&fs_bytes);
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let pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
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layout: &pipeline_layout,
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vertex_stage: wgpu::PipelineStageDescriptor {
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module: &vs_module,
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entry_point: "main",
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},
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fragment_stage: Some(wgpu::PipelineStageDescriptor {
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module: &fs_module,
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entry_point: "main",
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}),
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rasterization_state: wgpu::RasterizationStateDescriptor {
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front_face: wgpu::FrontFace::Cw,
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cull_mode: wgpu::CullMode::None,
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depth_bias: 0,
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depth_bias_slope_scale: 0.0,
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depth_bias_clamp: 0.0,
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},
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primitive_topology: wgpu::PrimitiveTopology::TriangleStrip,
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color_states: &[wgpu::ColorStateDescriptor {
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format: TEXTURE_FORMAT,
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color_blend: wgpu::BlendDescriptor::REPLACE,
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alpha_blend: wgpu::BlendDescriptor::REPLACE,
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write_mask: wgpu::ColorWrite::ALL,
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}],
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depth_stencil_state: None,
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index_format: wgpu::IndexFormat::Uint16,
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vertex_buffers: &[],
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sample_count: 1,
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});
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let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
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address_mode_u: wgpu::AddressMode::ClampToEdge,
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address_mode_v: wgpu::AddressMode::ClampToEdge,
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address_mode_w: wgpu::AddressMode::ClampToEdge,
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mag_filter: wgpu::FilterMode::Nearest,
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min_filter: wgpu::FilterMode::Nearest,
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mipmap_filter: wgpu::FilterMode::Nearest,
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lod_min_clamp: -100.0,
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lod_max_clamp: 100.0,
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compare_function: wgpu::CompareFunction::Always,
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});
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let views = (0 .. mip_count)
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.map(|mip| texture.create_view(&wgpu::TextureViewDescriptor {
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format: TEXTURE_FORMAT,
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dimension: wgpu::TextureViewDimension::D2,
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aspect: wgpu::TextureAspectFlags::COLOR,
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base_mip_level: mip,
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level_count: 1,
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base_array_layer: 0,
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array_count: 1,
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}))
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.collect::<Vec<_>>();
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let mut encoder = device.create_command_encoder(
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&wgpu::CommandEncoderDescriptor { todo: 0 }
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);
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for target_mip in 1 .. mip_count as usize {
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let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
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layout: &bind_group_layout,
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bindings: &[
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wgpu::Binding {
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binding: 0,
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resource: wgpu::BindingResource::TextureView(&views[target_mip - 1]),
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},
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wgpu::Binding {
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binding: 1,
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resource: wgpu::BindingResource::Sampler(&sampler),
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},
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],
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});
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let mut rpass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
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color_attachments: &[wgpu::RenderPassColorAttachmentDescriptor {
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attachment: &views[target_mip],
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resolve_target: None,
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load_op: wgpu::LoadOp::Clear,
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store_op: wgpu::StoreOp::Store,
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clear_color: wgpu::Color::WHITE,
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}],
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depth_stencil_attachment: None,
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});
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rpass.set_pipeline(&pipeline);
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rpass.set_bind_group(0, &bind_group, &[]);
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rpass.draw(0 .. 4, 0 .. 1);
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}
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encoder.finish()
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}
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}
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impl framework::Example for Example {
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fn init(sc_desc: &wgpu::SwapChainDescriptor, device: &mut wgpu::Device) -> Self {
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use std::mem;
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let mut init_encoder =
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device.create_command_encoder(&wgpu::CommandEncoderDescriptor { todo: 0 });
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// Create the vertex and index buffers
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let vertex_size = mem::size_of::<Vertex>();
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let vertex_data = create_vertices();
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let vertex_buf = device
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.create_buffer_mapped(vertex_data.len(), wgpu::BufferUsage::VERTEX)
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.fill_from_slice(&vertex_data);
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// Create pipeline layout
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let bind_group_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
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bindings: &[
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wgpu::BindGroupLayoutBinding {
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binding: 0,
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visibility: wgpu::ShaderStage::VERTEX,
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ty: wgpu::BindingType::UniformBuffer,
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},
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wgpu::BindGroupLayoutBinding {
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binding: 1,
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visibility: wgpu::ShaderStage::FRAGMENT,
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ty: wgpu::BindingType::SampledTexture,
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},
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wgpu::BindGroupLayoutBinding {
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binding: 2,
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visibility: wgpu::ShaderStage::FRAGMENT,
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ty: wgpu::BindingType::Sampler,
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},
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],
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});
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let pipeline_layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
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bind_group_layouts: &[&bind_group_layout],
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});
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// Create the texture
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let mip_level_count = 10;
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let size = 1 << mip_level_count;
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let texels = create_texels(size as usize);
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let texture_extent = wgpu::Extent3d {
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width: size,
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height: size,
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depth: 1,
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};
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let texture = device.create_texture(&wgpu::TextureDescriptor {
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size: texture_extent,
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array_layer_count: 1,
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mip_level_count,
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sample_count: 1,
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dimension: wgpu::TextureDimension::D2,
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format: TEXTURE_FORMAT,
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usage: wgpu::TextureUsage::SAMPLED | wgpu::TextureUsage::OUTPUT_ATTACHMENT | wgpu::TextureUsage::TRANSFER_DST,
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});
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let texture_view = texture.create_default_view();
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let temp_buf = device
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.create_buffer_mapped(texels.len(), wgpu::BufferUsage::TRANSFER_SRC)
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.fill_from_slice(&texels);
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init_encoder.copy_buffer_to_texture(
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wgpu::BufferCopyView {
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buffer: &temp_buf,
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offset: 0,
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row_pitch: 1 * size,
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image_height: size,
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},
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wgpu::TextureCopyView {
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texture: &texture,
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mip_level: 0,
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array_layer: 0,
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origin: wgpu::Origin3d {
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x: 0.0,
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y: 0.0,
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z: 0.0,
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},
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},
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texture_extent,
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);
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// Create other resources
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let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
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address_mode_u: wgpu::AddressMode::Repeat,
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address_mode_v: wgpu::AddressMode::Repeat,
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address_mode_w: wgpu::AddressMode::Repeat,
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mag_filter: wgpu::FilterMode::Linear,
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min_filter: wgpu::FilterMode::Linear,
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mipmap_filter: wgpu::FilterMode::Linear,
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lod_min_clamp: -100.0,
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lod_max_clamp: 100.0,
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compare_function: wgpu::CompareFunction::Always,
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});
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let mx_total = Self::generate_matrix(sc_desc.width as f32 / sc_desc.height as f32);
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let mx_ref: &[f32; 16] = mx_total.as_ref();
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let uniform_buf = device
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.create_buffer_mapped(
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16,
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wgpu::BufferUsage::UNIFORM | wgpu::BufferUsage::TRANSFER_DST,
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)
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.fill_from_slice(mx_ref);
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// Create bind group
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let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
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layout: &bind_group_layout,
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bindings: &[
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wgpu::Binding {
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binding: 0,
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resource: wgpu::BindingResource::Buffer {
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buffer: &uniform_buf,
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range: 0 .. 64,
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},
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},
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wgpu::Binding {
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binding: 1,
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resource: wgpu::BindingResource::TextureView(&texture_view),
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},
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wgpu::Binding {
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binding: 2,
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resource: wgpu::BindingResource::Sampler(&sampler),
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},
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],
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});
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// Create the render pipeline
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let vs_bytes = framework::load_glsl(
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include_str!("draw.vert"),
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framework::ShaderStage::Vertex,
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);
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let fs_bytes = framework::load_glsl(
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include_str!("draw.frag"),
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framework::ShaderStage::Fragment,
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);
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let vs_module = device.create_shader_module(&vs_bytes);
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let fs_module = device.create_shader_module(&fs_bytes);
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let draw_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
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layout: &pipeline_layout,
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vertex_stage: wgpu::PipelineStageDescriptor {
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module: &vs_module,
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entry_point: "main",
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},
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fragment_stage: Some(wgpu::PipelineStageDescriptor {
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module: &fs_module,
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entry_point: "main",
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}),
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rasterization_state: wgpu::RasterizationStateDescriptor {
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front_face: wgpu::FrontFace::Cw,
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cull_mode: wgpu::CullMode::Back,
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depth_bias: 0,
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depth_bias_slope_scale: 0.0,
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depth_bias_clamp: 0.0,
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},
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primitive_topology: wgpu::PrimitiveTopology::TriangleStrip,
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color_states: &[wgpu::ColorStateDescriptor {
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format: sc_desc.format,
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color_blend: wgpu::BlendDescriptor::REPLACE,
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alpha_blend: wgpu::BlendDescriptor::REPLACE,
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write_mask: wgpu::ColorWrite::ALL,
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}],
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depth_stencil_state: None,
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index_format: wgpu::IndexFormat::Uint16,
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vertex_buffers: &[wgpu::VertexBufferDescriptor {
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stride: vertex_size as wgpu::BufferAddress,
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step_mode: wgpu::InputStepMode::Vertex,
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attributes: &[
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wgpu::VertexAttributeDescriptor {
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format: wgpu::VertexFormat::Float4,
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offset: 0,
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shader_location: 0,
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},
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],
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}],
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sample_count: 1,
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});
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// Done
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let init_command_buf = init_encoder.finish();
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let mipmap_command_buf = Self::generate_mipmaps(&device, &texture, mip_level_count);
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device.get_queue().submit(&[init_command_buf, mipmap_command_buf]);
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Example {
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vertex_buf,
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bind_group,
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uniform_buf,
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draw_pipeline,
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}
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}
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fn update(&mut self, _event: wgpu::winit::WindowEvent) {
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//empty
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}
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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::TRANSFER_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.draw_pipeline);
|
||||
rpass.set_bind_group(0, &self.bind_group, &[]);
|
||||
rpass.set_vertex_buffers(&[(&self.vertex_buf, 0)]);
|
||||
rpass.draw(0 .. 4, 0 .. 1);
|
||||
}
|
||||
|
||||
device.get_queue().submit(&[encoder.finish()]);
|
||||
}
|
||||
}
|
||||
|
||||
fn main() {
|
||||
framework::run::<Example>("cube");
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user