fix(render): preserve transparency inheritance

Resolve ByBlock alpha independently from color and keep explicit opaque values from falling back to layer transparency.

Pin the matching cadcodec API across desktop, plugin, and web targets.

Refs HakanSeven12/cadcodec#2

Cargo.lock

@@ -72,7 +72,7 @@ checksum = "366ffbaa4442f4684d91e2cd7c5ea7c4ed8add41959a31447066e279e432b618"
 [[package]]
 name = "acadrust"
 version = "0.4.1"
-source = "git+https://git@github.com/HakanSeven12/cadcodec.git?rev=3a87743ad7b0fc74f0137ccd48f598116e2904b0#3a87743ad7b0fc74f0137ccd48f598116e2904b0"
+source = "git+https://git@github.com/HakanSeven12/cadcodec.git?rev=c91a1c1de89a0fbc006dc360ddb0251ac8c207d1#c91a1c1de89a0fbc006dc360ddb0251ac8c207d1"
 dependencies = [
  "ahash 0.8.12",
  "anyhow",

Cargo.toml

@@ -27,7 +27,7 @@ glam = { version = "0.33", features = ["bytemuck"] }
 rfd = "0.17"
 clap = { version = "4", features = ["derive"] }
 env_logger = "0.11"
-acadrust = { git = "https://github.com/HakanSeven12/cadcodec.git", rev = "3a87743ad7b0fc74f0137ccd48f598116e2904b0", features = ["serde"] }
+acadrust = { git = "https://github.com/HakanSeven12/cadcodec.git", rev = "c91a1c1de89a0fbc006dc360ddb0251ac8c207d1", features = ["serde"] }
 cadkernel = { git = "https://github.com/HakanSeven12/cadkernel.git", rev = "48c634995fa60d3928c37bae49b12b421c56c886", features = ["acis", "offset"] }
 dwg-thumbnailer = { path = "crates/dwg-thumbnailer" }
 flate2 = "1"
@@ -61,7 +61,7 @@ iced_core = { git = "https://github.com/iced-rs/iced.git", rev = "23604ff22ab0aa
 iced_widget = { git = "https://github.com/iced-rs/iced.git", rev = "23604ff22ab0aad9e00b9327cb7b8546ed84db39" }
 
 [patch."https://github.com/HakanSeven12/cadcodec.git"]
-acadrust = { git = "https://git@github.com/HakanSeven12/cadcodec.git", rev = "3a87743ad7b0fc74f0137ccd48f598116e2904b0" }
+acadrust = { git = "https://git@github.com/HakanSeven12/cadcodec.git", rev = "c91a1c1de89a0fbc006dc360ddb0251ac8c207d1" }
 
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]

crates/ocs_plugin_api/Cargo.toml

@@ -14,7 +14,7 @@ serde = { version = "1", features = ["derive"] }
 # Pulled in only by the `host` feature, which adds the `acadrust`-typed
 # `HostApi` runtime surface. The default crate stays dependency-free so engine
 # crates and external tooling can depend on the manifest/ribbon contract cheaply.
-acadrust = { git = "https://github.com/HakanSeven12/cadcodec.git", rev = "3a87743ad7b0fc74f0137ccd48f598116e2904b0", optional = true, features = ["serde"] }
+acadrust = { git = "https://github.com/HakanSeven12/cadcodec.git", rev = "c91a1c1de89a0fbc006dc360ddb0251ac8c207d1", optional = true, features = ["serde"] }
 
 # Runtime IPC and serialization (host feature only).
 interprocess = { version = "2", optional = true }
@@ -37,7 +37,7 @@ serde_json = "1"
 serde = { version = "1", features = ["derive"] }
 cargo-lock = "11"
 # acadrust is scanned at build time to generate the embedded type registry.
-acadrust = { git = "https://github.com/HakanSeven12/cadcodec.git", rev = "3a87743ad7b0fc74f0137ccd48f598116e2904b0", features = ["serde"] }
+acadrust = { git = "https://github.com/HakanSeven12/cadcodec.git", rev = "c91a1c1de89a0fbc006dc360ddb0251ac8c207d1", features = ["serde"] }
 
 [dev-dependencies]
 serde_json = "1"

crates/ocs_plugin_api/build.rs

@@ -123,6 +123,10 @@ fn add_enum_samples(tracer: &mut Tracer, samples: &mut Samples) {
     let _ = tracer.trace_value(samples, &acadrust::LineWeight::Default);
     let _ = tracer.trace_value(samples, &acadrust::LineWeight::Value(0));
 
+    let _ = tracer.trace_value(samples, &acadrust::Transparency::BY_LAYER);
+    let _ = tracer.trace_value(samples, &acadrust::Transparency::BY_BLOCK);
+    let _ = tracer.trace_value(samples, &acadrust::Transparency::OPAQUE);
+
     let _ = tracer.trace_value(samples, &acadrust::entities::SmoothSurfaceType::None);
     let _ = tracer.trace_value(
         samples,

crates/ocs_web_worker/Cargo.toml

@@ -8,7 +8,7 @@ publish = false
 crate-type = ["cdylib"]
 
 [dependencies]
-acadrust = { git = "https://github.com/HakanSeven12/cadcodec.git", rev = "3a87743ad7b0fc74f0137ccd48f598116e2904b0", features = ["serde"] }
+acadrust = { git = "https://github.com/HakanSeven12/cadcodec.git", rev = "c91a1c1de89a0fbc006dc360ddb0251ac8c207d1", features = ["serde"] }
 bincode = "1.3"
 serde = { version = "1", features = ["derive"] }
 console_error_panic_hook = "0.1"

src/entities/raster_image.rs

@@ -290,7 +290,7 @@ impl PropertyEditable for RasterImage {
             .flags
             .contains(acadrust::entities::ImageDisplayFlags::USE_CLIPPING_BOUNDARY);
         let clip_inverted = self.clip_boundary.clip_mode == acadrust::entities::ClipMode::Inside;
-        let transparency = format!("{:.0}%", self.common.transparency.as_percent() * 100.0);
+        let transparency = self.common.transparency.to_string();
         vec![
             PropSection {
                 title: t!("Geometry").into_owned(),

src/scene/cache/block_cache.rs

@@ -88,6 +88,7 @@ pub struct LocalWire {
     /// `points.is_empty() && !fill_tris.is_empty()`.
     pub is_fill_only: bool,
     pub color_is_byblock: bool,
+    pub transparency_is_byblock: bool,
     pub lt_is_byblock: bool,
     pub lw_is_byblock: bool,
     /// Set when this child sits on layer "0" and the matching property is
@@ -710,7 +711,8 @@ fn tessellate_sub_local(
         .unwrap_or(true);
     let color_l0 =
         !has_book_color && on_l0 && sub.common().color == AcadColor::ByLayer;
-    let transparency_l0 = on_l0 && sub.common().transparency.alpha() == 0;
+    let transparency_is_byblock = sub.common().transparency.is_by_block();
+    let transparency_l0 = on_l0 && sub.common().transparency.is_by_layer();
     let lt_l0 = on_l0 && {
         let lt = &sub.common().linetype;
         lt.is_empty() || lt.eq_ignore_ascii_case("bylayer")
@@ -846,10 +848,11 @@ fn tessellate_sub_local(
             hide_unselected: frame_mode == Some(0),
             is_fill_only,
             color_is_byblock: color_is_byblock && wire_on_base_color,
+            transparency_is_byblock,
             lt_is_byblock,
             lw_is_byblock,
             color_l0: color_l0 && wire_on_base_color,
-            transparency_l0: transparency_l0 && wire_on_base_color,
+            transparency_l0,
             lt_l0,
             lw_l0,
             aabb_local,
@@ -1990,24 +1993,28 @@ fn expand_defn(
 /// layer-0 rule → insert-layer colour, else the cached colour; finally xref
 /// fade. Shared by the stroke, fill, and greeked-text emit paths.
 fn resolve_wire_color(lw: &LocalWire, ctx: &ExpandCtx) -> [f32; 4] {
-    let c = if ctx.selected {
+    let mut color = if ctx.selected {
         WireModel::SELECTED
     } else if lw.color_is_byblock {
         ctx.ins_color
     } else if lw.color_l0 {
-        let alpha = if lw.transparency_l0 {
+        ctx.l0.color
+    } else {
+        lw.color
+    };
+    if !ctx.selected {
+        color[3] = if lw.transparency_is_byblock {
+            ctx.ins_color[3]
+        } else if lw.transparency_l0 {
             ctx.l0.color[3]
         } else {
             lw.color[3]
         };
-        [ctx.l0.color[0], ctx.l0.color[1], ctx.l0.color[2], alpha]
+    }
-    } else {
-        lw.color
-    };
     if ctx.is_xref && !ctx.selected {
-        fade_toward_bg(c, ctx.bg_color)
+        fade_toward_bg(color, ctx.bg_color)
     } else {
-        c
+        color
     }
 }
 
@@ -2592,7 +2599,7 @@ fn emit_wire(
             pos: [hx, hy, hz],
             pos_low: [lx, ly, lz],
             uv: tv.uv,
-            color: [rgb[0], rgb[1], rgb[2], tv.color[3]],
+            color: [rgb[0], rgb[1], rgb[2], final_color[3]],
             draw_depth: tv.draw_depth,
         });
     }

src/scene/cache/properties.rs

@@ -1,4 +1,4 @@
-use acadrust::{EntityType, Handle};
+use acadrust::{EntityType, Handle, Transparency};
 use crate::t;
 
 use crate::scene::model::object::{PropSection, PropValue, Property};
@@ -10,15 +10,12 @@ pub fn general_section(entity: &EntityType) -> PropSection {
     } else {
         common.linetype.clone()
     };
-    // Alpha 0 is ByLayer, Alpha 1 is ByBlock; show them by name and fall back
+    let transp_display = match common.transparency {
-    // to a rounded percentage for explicit values.
+        Transparency::ByLayer => "ByLayer".to_string(),
-    let transp_display = match common.transparency.alpha() {
+        Transparency::ByBlock => "ByBlock".to_string(),
-        0 => "ByLayer".to_string(),
+        Transparency::Explicit(alpha) => {
-        1 => "ByBlock".to_string(),
+            ((alpha as f64 / 255.0 * 100.0).round() as u32).to_string()
-        alpha => format!(
+        }
-            "{}",
-            (alpha as f64 / 255.0 * 100.0).round() as u32
-        ),
     };
 
     // Hyperlink is stored in XDATA under the "PE_URL" application.

src/scene/render_graph.rs

@@ -67,6 +67,8 @@ pub struct InsertStyleSpec {
     own: BlockStyle,
     color_byblock: bool,
     color_bylayer: bool,
+    transparency_byblock: bool,
+    transparency_bylayer: bool,
     linetype_byblock: bool,
     linetype_bylayer: bool,
     lineweight_byblock: bool,
@@ -83,6 +85,8 @@ impl InsertStyleSpec {
             own: BlockStyle::for_entity(document, &entity, viewport),
             color_byblock: !has_book_color && insert.common.color == Color::ByBlock,
             color_bylayer: !has_book_color && insert.common.color == Color::ByLayer,
+            transparency_byblock: insert.common.transparency.is_by_block(),
+            transparency_bylayer: insert.common.transparency.is_by_layer(),
             linetype_byblock: linetype.eq_ignore_ascii_case("byblock"),
             linetype_bylayer: linetype.is_empty() || linetype.eq_ignore_ascii_case("bylayer"),
             lineweight_byblock: matches!(
@@ -101,12 +105,23 @@ impl InsertStyleSpec {
     pub fn resolve(self, parent: BlockStyle) -> BlockStyle {
         let mut insert = self.own.insert;
         if self.color_byblock {
-            insert.0 = parent.insert.0;
+            insert.0[0] = parent.insert.0[0];
+            insert.0[1] = parent.insert.0[1];
+            insert.0[2] = parent.insert.0[2];
             insert.4 = parent.insert.4;
         } else if self.layer0 && self.color_bylayer {
-            insert.0 = parent.layer0.color;
+            insert.0[0] = parent.layer0.color[0];
+            insert.0[1] = parent.layer0.color[1];
+            insert.0[2] = parent.layer0.color[2];
             insert.4 = parent.layer0_aci;
         }
+        insert.0[3] = if self.transparency_byblock {
+            parent.insert.0[3]
+        } else if self.layer0 && self.transparency_bylayer {
+            parent.layer0.color[3]
+        } else {
+            insert.0[3]
+        };
         if self.linetype_byblock {
             insert.1 = parent.insert.1;
             insert.2 = parent.insert.2;

src/scene/selection.rs

@@ -675,11 +675,12 @@ impl Scene {
                 .to_string(),
             ),
             "lineweight" => Some(Self::format_lineweight(entity.common().line_weight)),
-            "transparency" => Some(if entity.common().transparency.alpha() == 0 {
+            "transparency" => Some(match entity.common().transparency {
-                "ByLayer".to_string()
+                acadrust::types::Transparency::ByLayer => "ByLayer".to_string(),
-            } else {
+                acadrust::types::Transparency::ByBlock => "ByBlock".to_string(),
-                ((entity.common().transparency.alpha() as f64 / 255.0 * 100.0).round() as u32)
+                acadrust::types::Transparency::Explicit(alpha) => {
-                    .to_string()
+                    ((alpha as f64 / 255.0 * 100.0).round() as u32).to_string()
+                }
             }),
             "hyperlink" => Some(
                 entity

src/scene/view/dispatch.rs

@@ -137,9 +137,13 @@ pub fn apply_common_prop(entity: &mut EntityType, field: &str, value: &str) {
         "transparency" => {
             let s = value.trim();
             if s.eq_ignore_ascii_case("ByLayer") {
-                entity.as_entity_mut().set_transparency(Transparency::new(0));
+                entity
+                    .as_entity_mut()
+                    .set_transparency(Transparency::BY_LAYER);
             } else if s.eq_ignore_ascii_case("ByBlock") {
-                entity.as_entity_mut().set_transparency(Transparency::new(1));
+                entity
+                    .as_entity_mut()
+                    .set_transparency(Transparency::BY_BLOCK);
             } else {
                 let clean = s.trim_end_matches('%').trim();
                 if let Ok(pct) = clean.parse::<f64>() {

src/scene/view/render.rs

@@ -2863,7 +2863,7 @@ pub(crate) fn render_style_for_viewport(
             _ => 0,
         };
         let [r, g, b, _] = tess_util::aci_to_rgba(resolved);
-        let transparency = if common.transparency.alpha() == 0 {
+        let transparency = if common.transparency.is_by_layer() {
             viewport_override(
                 document,
                 layer_name,
@@ -3077,18 +3077,21 @@ pub(crate) fn render_style_for_block_sub_viewport(
     let on_l0 = is_effective_layer_zero(&common.layer);
 
     let has_book_color = has_resolved_book_color(document, e);
-    let final_color = if !has_book_color && common.color == AcadColor::ByBlock {
+    let resolved_rgb = if !has_book_color && common.color == AcadColor::ByBlock {
         insert_color
     } else if !has_book_color && on_l0 && common.color == AcadColor::ByLayer {
-        let alpha = if common.transparency.alpha() == 0 {
+        l0.color
-            l0.color[3]
-        } else {
-            color[3]
-        };
-        [l0.color[0], l0.color[1], l0.color[2], alpha]
     } else {
         color
     };
+    let alpha = if common.transparency.is_by_block() {
+        insert_color[3]
+    } else if on_l0 && common.transparency.is_by_layer() {
+        l0.color[3]
+    } else {
+        color[3]
+    };
+    let final_color = [resolved_rgb[0], resolved_rgb[1], resolved_rgb[2], alpha];
 
     let lt_bylayer =
         common.linetype.is_empty() || common.linetype.eq_ignore_ascii_case("bylayer");
@@ -4319,4 +4322,22 @@ mod layer0_inherit_tests {
         assert_eq!(&c[..3], &walls[..3], "RGB inherited from the insert layer");
         assert!((c[3] - 0.5).abs() < 0.02, "child's own 50% transparency is kept, got {}", c[3]);
     }
+
+    #[test]
+    fn byblock_transparency_inherits_insert_alpha() {
+        let d = doc();
+        let mut entity = child("Other", Color::Index(3));
+        entity.common_mut().transparency = Transparency::BY_BLOCK;
+        let color = resolve(&d, &entity, [0.2, 0.4, 0.6, 0.25]);
+        assert_eq!(color[3], 0.25);
+    }
+
+    #[test]
+    fn explicit_opaque_does_not_inherit_alpha() {
+        let d = doc();
+        let mut entity = child("0", Color::ByLayer);
+        entity.common_mut().transparency = Transparency::OPAQUE;
+        let color = resolve(&d, &entity, [0.2, 0.4, 0.6, 0.25]);
+        assert_eq!(color[3], 1.0);
+    }
 }