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Desktop add viewport texture (#2953)

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* Allow rendering viewport texture beneath ui texture

* Add viewport scale

* Update desktop/src/render/fullscreen_texture.wgsl

---------

Co-authored-by: Dennis Kobert <dennis@kobert.dev>
This commit is contained in:
Timon
2025-07-28 17:10:27 +00:00
committed by GitHub
co-authored by Dennis Kobert
parent 83d39fb320
commit 6119dea58c
5 changed files with 94 additions and 18 deletions
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desktop/src/render/fullscreen_texture.wgsl
+17 -2
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@@ -25,12 +25,27 @@ fn vs_main(@builtin(vertex_index) vertex_index: u32) -> VertexOutput {
return out;
}
struct Constants {
viewport_scale: vec2<f32>,
viewport_offset: vec2<f32>,
};
var<push_constant> constants: Constants;
@group(0) @binding(0)
var t_diffuse: texture_2d<f32>;
var t_ui: texture_2d<f32>;
@group(0) @binding(1)
var t_viewport: texture_2d<f32>;
@group(0) @binding(2)
var s_diffuse: sampler;
@fragment
fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
return textureSample(t_diffuse, s_diffuse, in.tex_coords);
let ui_color: vec4<f32> = textureSample(t_ui, s_diffuse, in.tex_coords);
if (ui_color.a == 1.0) {
return ui_color;
}
let viewport_tex_coords = (in.tex_coords - constants.viewport_offset) * constants.viewport_scale;
let viewport_color: vec4<f32> = textureSample(t_viewport, s_diffuse, viewport_tex_coords);
return ui_color * ui_color.a + viewport_color * (1.0 - ui_color.a);
}