100 lines
2.9 KiB
Rust
100 lines
2.9 KiB
Rust
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use image::GenericImageView;
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use wgpu::util::DeviceExt;
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pub struct Texture {
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pub texture: wgpu::Texture,
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pub view: wgpu::TextureView,
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pub sampler: wgpu::Sampler,
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}
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impl Texture {
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pub fn from_bytes(
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device: &wgpu::Device,
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bytes: &[u8],
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label: &str,
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) -> Result<(Self, wgpu::CommandBuffer), failure::Error> {
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let img = image::load_from_memory(bytes)?;
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Self::from_image(device, &img, Some(label))
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}
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pub fn from_image(
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device: &wgpu::Device,
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img: &image::DynamicImage,
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label: Option<&str>,
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) -> Result<(Self, wgpu::CommandBuffer), failure::Error> {
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let rgba = img.as_rgba8().unwrap();
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let (width, height) = img.dimensions();
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let size = wgpu::Extent3d {
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width,
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height,
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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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label: Some("texture"),
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size,
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mip_level_count: 1,
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sample_count: 1,
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dimension: wgpu::TextureDimension::D2,
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format: wgpu::TextureFormat::Rgba8UnormSrgb,
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usage: wgpu::TextureUsage::SAMPLED | wgpu::TextureUsage::COPY_DST,
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});
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let buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
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label: Some("buffer"),
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contents: &rgba,
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usage: wgpu::BufferUsage::COPY_SRC,
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});
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let mut encoder = device.create_command_encoder(&wgpu::CommandEncoderDescriptor {
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label: Some("texture_buffer_copy_encoder"),
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});
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encoder.copy_buffer_to_texture(
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wgpu::BufferCopyView {
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buffer: &buffer,
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layout: wgpu::TextureDataLayout {
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offset: 0,
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bytes_per_row: 4 * width,
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rows_per_image: height,
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},
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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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origin: wgpu::Origin3d::ZERO,
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},
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size,
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);
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let command = encoder.finish();
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let view = texture.create_view(&Default::default());
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let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
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label: Some("sampler"),
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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::Linear,
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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: None,
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anisotropy_clamp: None,
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});
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Ok((
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Texture {
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texture,
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view,
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sampler,
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},
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command,
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))
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}
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}
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