🐛 Fix path rotation

render-wasm/src/shapes.rs

@@ -2,7 +2,7 @@ use crate::math;
 use skia_safe as skia;
 use uuid::Uuid;
 
-use crate::render::BlendMode;
+use crate::render::{BlendMode, Renderable};
 
 mod fills;
 mod images;
@@ -138,6 +138,21 @@ impl Shape {
     pub fn set_blend_mode(&mut self, mode: BlendMode) {
         self.blend_mode = mode;
     }
+
+    fn to_path_transform(&self) -> Option<skia::Matrix> {
+        match self.kind {
+            Kind::Path(_) => {
+                let center = self.bounds().center();
+                let mut matrix = skia::Matrix::new_identity();
+                matrix.pre_translate(center);
+                matrix.pre_concat(&self.transform.no_translation().to_skia_matrix().invert()?);
+                matrix.pre_translate(-center);
+
+                Some(matrix)
+            }
+            _ => None,
+        }
+    }
 }
 
 #[cfg(test)]

render-wasm/src/shapes/images.rs

@@ -1,71 +1,3 @@
-use crate::math;
-use crate::shapes::Kind;
 use skia_safe as skia;
 
 pub type Image = skia::Image;
-
-pub fn draw_image_in_container(
-    canvas: &skia::Canvas,
-    image: &Image,
-    size: (i32, i32),
-    kind: &Kind,
-    paint: &skia::Paint,
-) {
-    let width = size.0 as f32;
-    let height = size.1 as f32;
-    let image_aspect_ratio = width / height;
-
-    let container = match kind {
-        Kind::Rect(r) => r.to_owned(),
-        Kind::Circle(r) => r.to_owned(),
-        Kind::Path(p) => p.to_skia_path().bounds().to_owned(),
-    };
-
-    // Container size
-    let container_width = container.width();
-    let container_height = container.height();
-    let container_aspect_ratio = container_width / container_height;
-
-    // Calculate scale to ensure the image covers the container
-    let scale = if image_aspect_ratio > container_aspect_ratio {
-        // Image is widther, scale based on height to cover container
-        container_height / height
-    } else {
-        // Image is taller, scale based on width to cover container
-        container_width / width
-    };
-
-    // Scaled size of the image
-    let scaled_width = width * scale;
-    let scaled_height = height * scale;
-
-    // Calculate offset to center the image in the container
-    let offset_x = container.left + (container_width - scaled_width) / 2.0;
-    let offset_y = container.top + (container_height - scaled_height) / 2.0;
-
-    let dest_rect = math::Rect::from_xywh(offset_x, offset_y, scaled_width, scaled_height);
-
-    // Save the current canvas state
-    canvas.save();
-
-    // Set the clipping rectangle to the container bounds
-    match kind {
-        Kind::Rect(_) => {
-            canvas.clip_rect(container, skia::ClipOp::Intersect, true);
-        }
-        Kind::Circle(_) => {
-            let mut oval_path = skia::Path::new();
-            oval_path.add_oval(container, None);
-            canvas.clip_path(&oval_path, skia::ClipOp::Intersect, true);
-        }
-        Kind::Path(p) => {
-            canvas.clip_path(&p.to_skia_path(), skia::ClipOp::Intersect, true);
-        }
-    }
-
-    // Draw the image with the calculated destination rectangle
-    canvas.draw_image_rect(image, None, dest_rect, &paint);
-
-    // Restore the canvas to remove the clipping
-    canvas.restore();
-}

render-wasm/src/shapes/matrix.rs

@@ -1,6 +1,6 @@
 use skia_safe as skia;
 
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Matrix {
     pub a: f32,
     pub b: f32,
@@ -47,6 +47,15 @@ impl Matrix {
         res
     }
 
+    pub fn no_translation(&self) -> Self {
+        let mut res = Self::identity();
+        res.c = self.c;
+        res.b = self.b;
+        res.a = self.a;
+        res.d = self.d;
+        res
+    }
+
     fn translation(&self) -> (f32, f32) {
         (self.e, self.f)
     }

render-wasm/src/shapes/renderable.rs

@@ -1,7 +1,7 @@
 use skia_safe as skia;
 use uuid::Uuid;
 
-use super::{draw_image_in_container, Fill, Kind, Shape};
+use super::{Fill, Image, Kind, Shape};
 use crate::math::Rect;
 use crate::render::{ImageStore, Renderable};
 
@@ -10,7 +10,7 @@ impl Renderable for Shape {
         let transform = self.transform.to_skia_matrix();
 
         // Check transform-matrix code from common/src/app/common/geom/shapes/transforms.cljc
-        let center = self.selrect.center();
+        let center = self.bounds().center();
         let mut matrix = skia::Matrix::new_identity();
         matrix.pre_translate(center);
         matrix.pre_concat(&transform);
@@ -19,7 +19,14 @@ impl Renderable for Shape {
         surface.canvas().concat(&matrix);
 
         for fill in self.fills().rev() {
-            render_fill(surface, images, fill, self.selrect, &self.kind);
+            render_fill(
+                surface,
+                images,
+                fill,
+                self.selrect,
+                &self.kind,
+                self.to_path_transform().as_ref(),
+            );
         }
 
         let mut paint = skia::Paint::default();
@@ -60,6 +67,7 @@ fn render_fill(
     fill: &Fill,
     selrect: Rect,
     kind: &Kind,
+    path_transform: Option<&skia::Matrix>,
 ) {
     match (fill, kind) {
         (Fill::Image(image_fill), kind) => {
@@ -71,6 +79,8 @@ fn render_fill(
                     image_fill.size(),
                     kind,
                     &fill.to_paint(&selrect),
+                    &selrect,
+                    path_transform,
                 );
             }
         }
@@ -81,9 +91,77 @@ fn render_fill(
             surface.canvas().draw_oval(rect, &fill.to_paint(&selrect));
         }
         (_, Kind::Path(path)) => {
-            surface
-                .canvas()
-                .draw_path(&path.to_skia_path(), &fill.to_paint(&selrect));
+            surface.canvas().draw_path(
+                &path.to_skia_path().transform(path_transform.unwrap()),
+                &fill.to_paint(&selrect),
+            );
         }
     }
 }
+
+pub fn draw_image_in_container(
+    canvas: &skia::Canvas,
+    image: &Image,
+    size: (i32, i32),
+    kind: &Kind,
+    paint: &skia::Paint,
+    container: &Rect,
+    path_transform: Option<&skia::Matrix>,
+) {
+    let width = size.0 as f32;
+    let height = size.1 as f32;
+    let image_aspect_ratio = width / height;
+
+    // Container size
+    let container_width = container.width();
+    let container_height = container.height();
+    let container_aspect_ratio = container_width / container_height;
+
+    // Calculate scale to ensure the image covers the container
+    let scale = if image_aspect_ratio > container_aspect_ratio {
+        // Image is wider, scale based on height to cover container
+        container_height / height
+    } else {
+        // Image is taller, scale based on width to cover container
+        container_width / width
+    };
+
+    // Scaled size of the image
+    let scaled_width = width * scale;
+    let scaled_height = height * scale;
+
+    let dest_rect = Rect::from_xywh(
+        container.left - (scaled_width - container_width) / 2.0,
+        container.top - (scaled_height - container_height) / 2.0,
+        scaled_width,
+        scaled_height,
+    );
+
+    // Save the current canvas state
+    canvas.save();
+
+    // Set the clipping rectangle to the container bounds
+    match kind {
+        Kind::Rect(_) => {
+            canvas.clip_rect(container, skia::ClipOp::Intersect, true);
+        }
+        Kind::Circle(_) => {
+            let mut oval_path = skia::Path::new();
+            oval_path.add_oval(container, None);
+            canvas.clip_path(&oval_path, skia::ClipOp::Intersect, true);
+        }
+        Kind::Path(p) => {
+            canvas.clip_path(
+                &p.to_skia_path().transform(path_transform.unwrap()),
+                skia::ClipOp::Intersect,
+                true,
+            );
+        }
+    }
+
+    // Draw the image with the calculated destination rectangle
+    canvas.draw_image_rect(image, None, dest_rect, &paint);
+
+    // Restore the canvas to remove the clipping
+    canvas.restore();
+}