fix a dumb text color issue

crates/yakui-vulkan/shaders/main.frag

@@ -21,13 +21,14 @@ void main() {
 
     if (workflow == WORKFLOW_TEXT) {
         vec4 coverage = texture(textures[texture_id], in_uv);
-        float alpha = max(max(coverage.r, coverage.g), coverage.b) * in_color.a;
-        float has_color = step(0.05, max(max(in_color.r, in_color.g), in_color.b));
+
+        float alpha = max(max(coverage.r, coverage.g), coverage.b) * in_color.a * coverage.a;
+        float has_color = step(0.05, max(max(in_color.r, in_color.g), max(in_color.b, in_color.a)));
         vec3 color = in_color.rgb * has_color * alpha + coverage.rgb * (1.0 - has_color);
 
         out_color = vec4(color, alpha);
     } else {
         vec4 user_texture = texture(textures[texture_id], in_uv);
         out_color = in_color * user_texture;
     }
-}
+}

crates/yakui-wgpu/shaders/text.wgsl

@@ -33,8 +33,8 @@ fn vs_main(
 fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
     let coverage = textureSample(coverage_texture, coverage_sampler, in.texcoord);
 
-    let alpha = max(max(coverage.r, coverage.g), coverage.b) * in.color.a;
-    let has_color = step(0.05, max(max(in.color.r, in.color.g), in.color.b));
+    let alpha = max(max(coverage.r, coverage.g), coverage.b) * in.color.a * coverage.a;
+    let has_color = step(0.05, max(max(in.color.r, in.color.g), max(in.color.b, in.color.a)));
 
     let color = in.color.rgb * has_color * alpha + coverage.rgb * (1.0 - has_color);
 

crates/yakui-widgets/src/widgets/render_text.rs

@@ -249,7 +249,7 @@ fn paint_text(
     if render.kind == Kind::Mask {
         rect.color = color;
     } else {
-        rect.color = Color::rgba(0, 0, 0, 255);
+        rect.color = Color::CLEAR;
     }
     rect.texture = Some((TextureId::Managed(render.texture), render.tex_rect));
     rect.pipeline = Pipeline::Text;