🔧 Support independent image bounds on wasm export (#11590)

render-wasm/src/render/fills.rs

@@ -3,8 +3,7 @@ use skia_safe::{self as skia, Paint, RRect};
 use super::{filters, RenderState, SurfaceId};
 use crate::error::Result;
 use crate::get_resources;
-use crate::math::Rect as MathRect;
-use crate::render::get_source_rect;
+use crate::render::{get_image_dest_rect, get_source_rect};
 use crate::shapes::{merge_fills, Fill, Frame, ImageFill, Rect, Shape, Type};
 
 // Set the clipping area to the shape outline within the container bounds
@@ -94,15 +93,7 @@ fn draw_image_fill(
     let container = &shape.selrect;
     let sampling = get_resources().sampling_options;
 
-    let dest_rect = match image_fill.transform() {
-        Some(tf) => MathRect::from_xywh(
-            container.left + tf.x * container.width(),
-            container.top + tf.y * container.height(),
-            tf.width * container.width(),
-            tf.height * container.height(),
-        ),
-        None => *container,
-    };
+    let dest_rect = get_image_dest_rect(container, image_fill);
     let src_rect = get_source_rect(size, &dest_rect, image_fill);
     let needs_clip = image_fill.transform().is_some() || !is_axis_aligned_image_rect(shape);
 
@@ -189,16 +180,7 @@ fn draw_svg_image_fill(
     let fill_layer = skia::canvas::SaveLayerRec::default().paint(paint);
     canvas.save_layer(&fill_layer);
 
-    let dest_rect = match image_fill.transform() {
-        Some(tf) => MathRect::from_xywh(
-            container.left + tf.x * container.width(),
-            container.top + tf.y * container.height(),
-            tf.width * container.width(),
-            tf.height * container.height(),
-        ),
-        None => *container,
-    };
-
+    let dest_rect = get_image_dest_rect(container, image_fill);
     let src_rect = get_source_rect(size, &dest_rect, image_fill);
     if src_rect.width() <= 0.0 || src_rect.height() <= 0.0 {
         canvas.restore();

render-wasm/src/render/images.rs

@@ -20,6 +20,18 @@ pub fn get_dest_rect(container: &MathRect, delta: f32) -> MathRect {
     )
 }
 
+pub fn get_image_dest_rect(container: &MathRect, image_fill: &ImageFill) -> MathRect {
+    match image_fill.transform() {
+        Some(tf) => MathRect::from_xywh(
+            container.left + tf.x * container.width(),
+            container.top + tf.y * container.height(),
+            tf.width * container.width(),
+            tf.height * container.height(),
+        ),
+        None => *container,
+    }
+}
+
 pub fn get_source_rect(size: ISize, container: &MathRect, image_fill: &ImageFill) -> MathRect {
     let image_width = size.width as f32;
     let image_height = size.height as f32;

render-wasm/src/render/svg/images.rs

@@ -5,7 +5,8 @@ use crate::shapes::{Fill, ImageFill, Shape};
 use crate::state::ShapesPoolRef;
 
 use super::document::SvgLayerCanvas;
-use crate::render::RenderResources;
+use crate::math::Rect as MathRect;
+use crate::render::{get_image_dest_rect, RenderResources};
 
 /// Emits fills bottom -> top for SVG export.
 ///
@@ -63,19 +64,20 @@ fn emit_image_fill(
     let clip_id = builder.unique("imgclip");
     builder.push_clip_path(&clip_id, shape, tree);
     let href = xml_escape_attr(url);
-    emit_linked_image_element(builder, shape, image_fill, &href, &clip_id);
+    let dest_rect = get_image_dest_rect(&shape.selrect(), image_fill);
+    emit_linked_image_element(builder, shape, image_fill, dest_rect, &href, &clip_id);
     Ok(())
 }
 
-/// Emits `<g clip-path>` + `<image href>` using the shape selrect and page CTM.
+/// Emits `<g clip-path>` + `<image href>` at `dest_rect`, under the page CTM.
 pub(super) fn emit_linked_image_element(
     builder: &mut SvgLayerCanvas,
     shape: &Shape,
     image_fill: &ImageFill,
+    dest_rect: MathRect,
     href: &str,
     clip_id: &str,
 ) {
-    let selrect = shape.selrect();
     let opacity = image_fill.opacity() as f32 / 255.0;
     let preserve = if image_fill.keep_aspect_ratio() {
         "xMidYMid slice"
@@ -93,10 +95,10 @@ pub(super) fn emit_linked_image_element(
     builder.open_group(&format!("clip-path=\"url(#{clip_id})\""));
     builder.push_raw(&format!(
         r#"<image href="{href}" x="{}" y="{}" width="{}" height="{}" preserveAspectRatio="{preserve}"{opacity_attr} transform="{transform}"/>"#,
-        selrect.left(),
-        selrect.top(),
-        selrect.width(),
-        selrect.height(),
+        dest_rect.left(),
+        dest_rect.top(),
+        dest_rect.width(),
+        dest_rect.height(),
     ));
     builder.close_group();
 }

render-wasm/src/render/svg/tests.rs

@@ -1,6 +1,8 @@
 use super::fixtures::*;
 
-use crate::shapes::{BlendMode, Fill, ImageFill, SolidColor, StrokeCap, StrokeKind};
+use crate::shapes::{
+    BlendMode, Fill, ImageFill, ImageFillTransform, SolidColor, StrokeCap, StrokeKind,
+};
 use crate::state::ShapesPool;
 use crate::uuid::Uuid;
 
@@ -1076,6 +1078,43 @@ fn exports_image_fill_as_linked_image() {
     insta::assert_snapshot!(svg);
 }
 
+#[test]
+fn exports_image_fill_bounds_transform() {
+    let mut pool = ShapesPool::new();
+    let id = uid(1);
+    let image_id = uid(42);
+    add_rect_with_fills(
+        &mut pool,
+        id,
+        Uuid::nil(),
+        (0.0, 0.0, 100.0, 80.0),
+        vec![Fill::Image(ImageFill::new_with_transform(
+            image_id,
+            255,
+            200,
+            100,
+            false,
+            Some(ImageFillTransform {
+                x: 0.25,
+                y: 0.5,
+                width: 0.5,
+                height: 0.25,
+            }),
+        ))],
+    );
+
+    let svg = render_with(&pool, id, |resources| {
+        resources
+            .images
+            .set_source_url(image_id, TEST_IMAGE_URL.to_string());
+    });
+
+    assert!(
+        svg.contains(r#"x="25" y="40" width="50" height="20""#),
+        "linked image must keep the independent image bounds: {svg}"
+    );
+}
+
 #[test]
 fn exports_mixed_solid_and_image_fills_in_order() {
     // Image under a translucent solid; stretch (keep-aspect off); partial image

render-wasm/src/render/svg/text.rs

@@ -117,6 +117,6 @@ fn emit_text_image_fill(
     builder.finish_clip_path_fragment(&clip_id, canvas);
 
     let href = xml_escape_attr(url);
-    emit_linked_image_element(builder, shape, image_fill, &href, &clip_id);
+    emit_linked_image_element(builder, shape, image_fill, shape.selrect(), &href, &clip_id);
     Ok(())
 }

render-wasm/src/render/vector.rs

@@ -12,7 +12,7 @@ use super::shape_renderer::ShapeRenderer;
 use super::text;
 use super::RenderResources;
 use super::RenderState;
-use super::{get_dest_rect, get_source_rect};
+use super::{get_dest_rect, get_image_dest_rect, get_source_rect};
 
 // ---------------------------------------------------------------------------
 // VectorRenderer — implements ShapeRenderer for canvas-based vector export
@@ -1043,8 +1043,8 @@ fn draw_image_fill(
     let size = image.dimensions();
     let container = &shape.selrect;
 
-    let src_rect = get_source_rect(size, container, image_fill);
-    let dest_rect = container;
+    let dest_rect = get_image_dest_rect(container, image_fill);
+    let src_rect = get_source_rect(size, &dest_rect, image_fill);
 
     canvas.save();