egui: add integration

src/egui_adapter/egui_oklch.rs

@@ -0,0 +1,37 @@
+use {
+    crate::{
+        cmm::cmm_eotf::Eotf,
+        theme::{Color, Oklab, Oklch},
+    },
+    egui::{Color32, Rgba},
+};
+
+#[expect(dead_code)]
+pub trait Color32Ext {
+    fn to_oklab(self) -> Oklab;
+    fn to_oklch(self) -> Oklch;
+}
+
+impl Color32Ext for Color32 {
+    fn to_oklab(self) -> Oklab {
+        let [r, g, b, a] = self.to_array();
+        Color::from_srgba_premultiplied(r, g, b, a).srgb_to_oklab()
+    }
+
+    fn to_oklch(self) -> Oklch {
+        self.to_oklab().to_oklch()
+    }
+}
+
+impl Into<Color32> for Oklch {
+    fn into(self) -> Color32 {
+        self.to_oklab().into()
+    }
+}
+
+impl Into<Color32> for Oklab {
+    fn into(self) -> Color32 {
+        let [r, g, b, a] = self.to_srgb().to_array(Eotf::Linear);
+        Rgba::from_rgba_premultiplied(r, g, b, a).into()
+    }
+}

src/egui_adapter/shaders/shader.frag

@@ -0,0 +1,13 @@
+#version 450
+
+layout(location = 0) in vec4 color;
+layout(location = 1) in vec2 pos;
+
+layout(binding = 0, set = 0) uniform sampler2D tex;
+
+layout(location = 0) out vec4 res;
+
+void main() {
+    vec4 src = texture(tex, pos);
+    res = color * src;
+}

src/egui_adapter/shaders/shader.vert

@@ -0,0 +1,19 @@
+#version 450
+
+layout(location = 0) in vec2 if_pos;
+layout(location = 1) in vec2 it_pos;
+layout(location = 2) in vec4 i_color;
+
+layout(location = 0) out vec4 o_color;
+layout(location = 1) out vec2 ot_pos;
+
+void main() {
+    o_color = i_color;
+    o_color.rgb = mix(
+        o_color.rgb / vec3(12.92),
+        pow((o_color.rgb + vec3(0.055)) / vec3(1.055), vec3(2.4)),
+        greaterThan(o_color.rgb, vec3(0.04045))
+    );
+    ot_pos = it_pos;
+    gl_Position = vec4(if_pos.x, if_pos.y, 0.0, 1.0);
+}

src/egui_adapter/shaders_hash.txt

@@ -0,0 +1,2 @@
+7eb8fae39ae513bc4f6973c12227aa4aa43734bdf34c90e1b3b69294ad98db87 src/egui_adapter/shaders/shader.frag
+501f4d0c5c5f10a371659b89f12d87abb03e5b57a31dbae5f3c6ca5726e4db01 src/egui_adapter/shaders/shader.vert