Fix Spine atlas alpha mode and point attachment rotation

Extensions/Spine/managers/pixi-spine-atlas-manager.ts

@@ -113,7 +113,38 @@ namespace gdjs {
           : 'anonymous',
       });
       PIXI.Assets.add({ alias, src: url, data: { images } });
-      return PIXI.Assets.load<spine.TextureAtlas>(alias);
+      const atlas = await PIXI.Assets.load<spine.TextureAtlas>(alias);
+
+      // The spine-pixi-v7 tint shader always samples atlas textures as if they
+      // were premultiplied (see the runtime comment in `renderMeshes`). When the
+      // spine loader loads the atlas pages itself, it sets each page texture's
+      // alpha mode accordingly (`PMA` for premultiplied atlases, `UNPACK`
+      // otherwise). Here we instead share the textures already loaded by the
+      // ImageManager, which are uploaded to the GPU with PIXI's default `UNPACK`
+      // mode (premultiply-on-upload). For atlases exported with premultiplied
+      // alpha (`pma: true`), this premultiplies the texture a second time, which
+      // produces dark fringes/halos ("shadows") around the rendered parts.
+      // Align each shared texture's alpha mode with what the atlas page declares.
+      const imageNames = Object.keys(images);
+      for (const page of atlas.pages) {
+        const baseTexture =
+          images[page.name] ||
+          (atlas.pages.length === 1 && imageNames.length === 1
+            ? images[imageNames[0]]
+            : undefined);
+        if (!baseTexture) continue;
+
+        const expectedAlphaMode = page.pma
+          ? PIXI.ALPHA_MODES.PMA
+          : PIXI.ALPHA_MODES.UNPACK;
+        if (baseTexture.alphaMode !== expectedAlphaMode) {
+          baseTexture.alphaMode = expectedAlphaMode;
+          // Force a re-upload to the GPU so the new alpha mode takes effect.
+          baseTexture.update();
+        }
+      }
+
+      return atlas;
     }
 
     /**

Extensions/Spine/spineruntimeobject-pixi-renderer.ts

@@ -254,14 +254,22 @@ namespace gdjs {
           this._rendererObject
         );
 
+      // Rotation of the point attachment within the skeleton, in degrees.
+      // `computeWorldRotation` accounts for both the attachment's own rotation
+      // (the angle set on the point in the Spine editor) and the full bone chain
+      // it is attached to.
+      // Note: the previous code returned only `slot.bone.rotation` for the local
+      // case, which ignored the attachment's own rotation entirely - so a point's
+      // configured angle had no effect on the "local rotation" expression.
+      const localRotation = attachment.computeWorldRotation(slot.bone);
+
       if (isWorld) {
-        return (
-          gdjs.toDegrees(this._rendererObject.rotation) +
-          attachment.computeWorldRotation(slot.bone)
-        );
+        // Add the object's own rotation to express the angle in scene space, so
+        // that: world rotation = local rotation + object angle.
+        return gdjs.toDegrees(this._rendererObject.rotation) + localRotation;
       }
 
-      return slot.bone.rotation;
+      return localRotation;
     }
 
     getPointAttachmentScale(

newIDE/app/src/ObjectsRendering/PixiResourcesLoader.js

@@ -1019,6 +1019,32 @@ export default class PixiResourcesLoader {
       });
       PIXI.Assets.load(spineTextureAtlasName).then(
         textureAtlas => {
+          // The spine-pixi-v7 tint shader always samples atlas textures as if
+          // they were premultiplied. The shared textures loaded by the engine
+          // are uploaded with PIXI's default UNPACK mode (premultiply-on-upload),
+          // so atlases exported with premultiplied alpha (`pma: true`) would be
+          // premultiplied a second time, producing dark fringes/halos
+          // ("shadows") around the rendered parts. Align each shared texture's
+          // alpha mode with what the atlas page declares.
+          const imageNames = Object.keys(images);
+          for (const page of textureAtlas.pages) {
+            const baseTexture =
+              images[page.name] ||
+              (textureAtlas.pages.length === 1 && imageNames.length === 1
+                ? images[imageNames[0]]
+                : undefined);
+            if (!baseTexture) continue;
+
+            const expectedAlphaMode = page.pma
+              ? PIXI.ALPHA_MODES.PMA
+              : PIXI.ALPHA_MODES.UNPACK;
+            if (baseTexture.alphaMode !== expectedAlphaMode) {
+              baseTexture.alphaMode = expectedAlphaMode;
+              // Force a re-upload to the GPU so the new alpha mode takes effect.
+              baseTexture.update();
+            }
+          }
+
           resolve({
             textureAtlas,
             atlasAlias: spineTextureAtlasName,