931e716b97
Based on https://github.com/hasenbanck/egui_wgpu_backend `egui-wgpu` is now an official backend for `eframe` (opt-in). Use the `wgpu` feature flag on `eframe` and the `NativeOptions::renderer` settings to pick it. Co-authored-by: Nils Hasenbanck <nils@hasenbanck.de> Co-authored-by: Sven Niederberger <niederberger@embotech.com> Co-authored-by: Sven Niederberger <73159570+s-nie@users.noreply.github.com>
86 lines
2.2 KiB
WebGPU Shading Language
86 lines
2.2 KiB
WebGPU Shading Language
// Vertex shader bindings
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struct VertexOutput {
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[[location(0)]] tex_coord: vec2<f32>;
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[[location(1)]] color: vec4<f32>;
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[[builtin(position)]] position: vec4<f32>;
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};
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struct Locals {
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screen_size: vec2<f32>;
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};
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[[group(0), binding(0)]] var<uniform> r_locals: Locals;
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// 0-1 from 0-255
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fn linear_from_srgb(srgb: vec3<f32>) -> vec3<f32> {
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let cutoff = srgb < vec3<f32>(10.31475);
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let lower = srgb / vec3<f32>(3294.6);
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let higher = pow((srgb + vec3<f32>(14.025)) / vec3<f32>(269.025), vec3<f32>(2.4));
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return select(higher, lower, cutoff);
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}
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[[stage(vertex)]]
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fn vs_main(
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[[location(0)]] a_pos: vec2<f32>,
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[[location(1)]] a_tex_coord: vec2<f32>,
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[[location(2)]] a_color: u32,
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) -> VertexOutput {
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var out: VertexOutput;
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out.tex_coord = a_tex_coord;
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// [u8; 4] SRGB as u32 -> [r, g, b, a]
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let color = vec4<f32>(
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f32(a_color & 255u),
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f32((a_color >> 8u) & 255u),
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f32((a_color >> 16u) & 255u),
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f32((a_color >> 24u) & 255u),
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);
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out.color = vec4<f32>(linear_from_srgb(color.rgb), color.a / 255.0);
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out.position = vec4<f32>(
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2.0 * a_pos.x / r_locals.screen_size.x - 1.0,
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1.0 - 2.0 * a_pos.y / r_locals.screen_size.y,
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0.0,
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1.0,
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);
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return out;
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}
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[[stage(vertex)]]
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fn vs_conv_main(
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[[location(0)]] a_pos: vec2<f32>,
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[[location(1)]] a_tex_coord: vec2<f32>,
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[[location(2)]] a_color: u32,
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) -> VertexOutput {
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var out: VertexOutput;
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out.tex_coord = a_tex_coord;
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// [u8; 4] SRGB as u32 -> [r, g, b, a]
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let color = vec4<f32>(
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f32(a_color & 255u),
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f32((a_color >> 8u) & 255u),
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f32((a_color >> 16u) & 255u),
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f32((a_color >> 24u) & 255u),
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);
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out.color = vec4<f32>(color.rgba / 255.0);
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out.position = vec4<f32>(
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2.0 * a_pos.x / r_locals.screen_size.x - 1.0,
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1.0 - 2.0 * a_pos.y / r_locals.screen_size.y,
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0.0,
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1.0,
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);
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return out;
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}
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// Fragment shader bindings
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[[group(1), binding(0)]] var r_tex_color: texture_2d<f32>;
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[[group(1), binding(1)]] var r_tex_sampler: sampler;
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[[stage(fragment)]]
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fn fs_main(in: VertexOutput) -> [[location(0)]] vec4<f32> {
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return in.color * textureSample(r_tex_color, r_tex_sampler, in.tex_coord);
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}
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