use std::mem::size_of;
use ribir_geom::{rect_corners, DevicePoint, DeviceRect, DeviceSize};
use ribir_painter::Vertex;
use wgpu::{include_wgsl, StoreOp};
use zerocopy::AsBytes;
use super::vertex_buffer::new_vertices;
use crate::{command_encoder, gpu_backend::Texture, vertices_coord, WgpuImpl, WgpuTexture};
pub struct CopyTexturePass {
pipeline: Option<wgpu::RenderPipeline>,
shader: wgpu::ShaderModule,
layout: wgpu::PipelineLayout,
pub(crate) bind_layout: wgpu::BindGroupLayout,
format: Option<wgpu::TextureFormat>,
vertices_buffer: wgpu::Buffer,
}
impl CopyTexturePass {
pub fn new(device: &wgpu::Device) -> Self {
let shader = device.create_shader_module(include_wgsl!("./shaders/copy_texture.wgsl"));
let bind_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
entries: &[
wgpu::BindGroupLayoutEntry {
binding: 0,
visibility: wgpu::ShaderStages::FRAGMENT,
ty: wgpu::BindingType::Texture {
sample_type: wgpu::TextureSampleType::Float { filterable: true },
view_dimension: wgpu::TextureViewDimension::D2,
multisampled: false,
},
count: None,
},
wgpu::BindGroupLayoutEntry {
binding: 1,
visibility: wgpu::ShaderStages::FRAGMENT,
ty: wgpu::BindingType::Sampler(wgpu::SamplerBindingType::Filtering),
count: None,
},
],
label: Some("Copy texture"),
});
let layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
label: Some("Copy texture"),
bind_group_layouts: &[&bind_layout],
push_constant_ranges: &[],
});
let vertices_buffer = new_vertices::<[f32; 2]>(device, 4);
Self { pipeline: None, shader, format: None, bind_layout, layout, vertices_buffer }
}
pub fn update(&mut self, format: wgpu::TextureFormat, device: &wgpu::Device) {
if Some(format) != self.format {
self.format = Some(format);
self.pipeline.take();
}
if self.pipeline.is_none() {
let pipeline = tex_render_pipeline::<[f32; 2]>(
"Copy texture",
device,
&self.layout,
&self.shader,
&[
wgpu::VertexAttribute {
offset: 0,
shader_location: 0,
format: wgpu::VertexFormat::Float32x2,
},
wgpu::VertexAttribute {
offset: (size_of::<[f32; 2]>()) as wgpu::BufferAddress,
shader_location: 1,
format: wgpu::VertexFormat::Float32x2,
},
],
format,
wgpu::PrimitiveTopology::TriangleStrip,
);
self.pipeline = Some(pipeline);
}
}
}
pub struct ClearTexturePass {
pipeline: Option<wgpu::RenderPipeline>,
shader: wgpu::ShaderModule,
layout: wgpu::PipelineLayout,
format: Option<wgpu::TextureFormat>,
vertices_buffer: wgpu::Buffer,
}
impl ClearTexturePass {
pub fn new(device: &wgpu::Device) -> Self {
let shader = device.create_shader_module(include_wgsl!("./shaders/clear_texture.wgsl"));
let layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
label: Some("Clear texture areas"),
bind_group_layouts: &[],
push_constant_ranges: &[],
});
let vertices_buffer = new_vertices::<()>(device, 256);
Self { pipeline: None, shader, format: None, layout, vertices_buffer }
}
pub fn update(&mut self, format: wgpu::TextureFormat, device: &wgpu::Device) {
if Some(format) != self.format {
self.format = Some(format);
self.pipeline.take();
}
if self.pipeline.is_none() {
let pipeline = tex_render_pipeline::<()>(
"Clear texture areas",
device,
&self.layout,
&self.shader,
&[wgpu::VertexAttribute {
offset: 0,
shader_location: 0,
format: wgpu::VertexFormat::Float32x2,
}],
format,
wgpu::PrimitiveTopology::TriangleList,
);
self.pipeline = Some(pipeline);
}
}
}
impl WgpuImpl {
pub(crate) fn draw_texture_to_texture(
&mut self, dist_tex: &WgpuTexture, dist_at: DevicePoint, from_tex: &WgpuTexture,
src_rect: &DeviceRect,
) {
let pass = self
.copy_tex_pass
.get_or_insert_with(|| CopyTexturePass::new(&self.device));
pass.update(dist_tex.format(), &self.device);
let [d_lt, d_rt, d_rb, d_lb] =
vertices_corners(&DeviceRect::new(dist_at, src_rect.size), Texture::size(dist_tex));
let [s_lt, s_rt, s_rb, s_lb] = vertices_corners(src_rect, Texture::size(from_tex));
self.queue.write_buffer(
&pass.vertices_buffer,
0,
[
Vertex::new(d_lt, s_lt),
Vertex::new(d_lb, s_lb),
Vertex::new(d_rt, s_rt),
Vertex::new(d_rb, s_rb),
]
.as_bytes(),
);
let bind_group = self
.device
.create_bind_group(&wgpu::BindGroupDescriptor {
layout: &pass.bind_layout,
entries: &[
wgpu::BindGroupEntry {
binding: 0,
resource: wgpu::BindingResource::TextureView(from_tex.view()),
},
wgpu::BindGroupEntry {
binding: 1,
resource: wgpu::BindingResource::Sampler(&self.sampler),
},
],
label: Some("Color primitives storage bind group"),
});
let color_attachments = wgpu::RenderPassColorAttachment {
view: dist_tex.view(),
resolve_target: None,
ops: wgpu::Operations { load: wgpu::LoadOp::Load, store: StoreOp::Store },
};
let encoder = command_encoder!(self);
let mut rpass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
label: Some("Copy texture"),
color_attachments: &[Some(color_attachments)],
depth_stencil_attachment: None,
timestamp_writes: None,
occlusion_query_set: None,
});
rpass.set_vertex_buffer(0, pass.vertices_buffer.slice(..));
rpass.set_bind_group(0, &bind_group, &[]);
rpass.set_scissor_rect(
dist_at.x as u32,
dist_at.y as u32,
src_rect.width() as u32,
src_rect.height() as u32,
);
rpass.set_pipeline(pass.pipeline.as_ref().unwrap());
rpass.draw(0..4, 0..1)
}
pub(crate) fn clear_tex_areas(&mut self, clear_areas: &[DeviceRect], tex: &WgpuTexture) {
self.finish_command();
let Self { clear_tex_pass: pass, device, queue, .. } = self;
pass.update(tex.format(), device);
let tex_size = tex.size();
let mut vertices: Vec<[f32; 2]> = Vec::with_capacity(clear_areas.len() * 4);
for area in clear_areas {
let [d_lt, d_rt, d_rb, d_lb] = vertices_corners(area, tex_size);
vertices.push(d_lt);
vertices.push(d_lb);
vertices.push(d_rb);
vertices.push(d_rb);
vertices.push(d_rt);
vertices.push(d_lt);
}
let vertices_data = vertices.as_bytes();
if pass.vertices_buffer.size() < vertices_data.len() as wgpu::BufferAddress {
pass.vertices_buffer = new_vertices::<()>(device, vertices.len());
}
queue.write_buffer(&pass.vertices_buffer, 0, vertices_data);
let color_attachments = wgpu::RenderPassColorAttachment {
view: tex.view(),
resolve_target: None,
ops: wgpu::Operations { load: wgpu::LoadOp::Load, store: StoreOp::Store },
};
let encoder = command_encoder!(self);
let mut rpass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
label: Some("Clear texture areas"),
color_attachments: &[Some(color_attachments)],
depth_stencil_attachment: None,
timestamp_writes: None,
occlusion_query_set: None,
});
rpass.set_vertex_buffer(0, pass.vertices_buffer.slice(..));
rpass.set_pipeline(pass.pipeline.as_ref().unwrap());
rpass.draw(0..vertices.len() as u32, 0..1);
}
}
fn tex_render_pipeline<T>(
label: &str, device: &wgpu::Device, layout: &wgpu::PipelineLayout, shader: &wgpu::ShaderModule,
vertex_attrs: &[wgpu::VertexAttribute], format: wgpu::TextureFormat,
topology: wgpu::PrimitiveTopology,
) -> wgpu::RenderPipeline {
device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
label: Some(label),
layout: Some(layout),
vertex: wgpu::VertexState {
module: shader,
entry_point: "vs_main",
buffers: &[wgpu::VertexBufferLayout {
array_stride: size_of::<Vertex<T>>() as wgpu::BufferAddress,
step_mode: wgpu::VertexStepMode::Vertex,
attributes: vertex_attrs,
}],
compilation_options: Default::default(),
},
fragment: Some(wgpu::FragmentState {
module: shader,
entry_point: "fs_main",
targets: &[Some(wgpu::ColorTargetState {
format,
blend: Some(wgpu::BlendState::REPLACE),
write_mask: wgpu::ColorWrites::all(),
})],
compilation_options: Default::default(),
}),
primitive: wgpu::PrimitiveState {
topology,
strip_index_format: None,
front_face: wgpu::FrontFace::Ccw,
cull_mode: None,
unclipped_depth: false,
polygon_mode: wgpu::PolygonMode::Fill,
conservative: false,
},
depth_stencil: None,
multisample: wgpu::MultisampleState { count: 1, mask: !0, alpha_to_coverage_enabled: false },
multiview: None,
})
}
fn vertices_corners(rect: &DeviceRect, tex_size: DeviceSize) -> [[f32; 2]; 4] {
let [a, b, c, d] = rect_corners(&rect.to_f32().cast_unit());
[
vertices_coord(a, tex_size),
vertices_coord(b, tex_size),
vertices_coord(c, tex_size),
vertices_coord(d, tex_size),
]
}