fix: images with width and height specified may dissapear in print

- fix #1321

packages/core/src/vivliostyle/epub.ts

@@ -1834,14 +1834,38 @@ export class OPFView implements Vgen.CustomRendererFactory {
  }
 
  renderAllPages(): Task.Result<PageAndPosition | null> {
- return this.renderPagesUpto(
+ const frame: Task.Frame<PageAndPosition | null> =
+ Task.newFrame("renderAllPages");
+ this.renderPagesUpto(
  {
  spineIndex: this.opf.spine.length - 1,
  pageIndex: Number.POSITIVE_INFINITY,
  offsetInItem: -1,
  },
  false,
- );
+ ).then((result) => {
+ // Wait until all images are loaded (Issue #1321)
+ frame
+ .loopWithFrame((loopFrame) => {
+ if (
+ this.spineItems.some((viewItem) =>
+ viewItem.pages.some((page) =>
+ page.fetchers.some((fetcher) => !fetcher.arrived),
+ ),
+ )
+ ) {
+ frame.sleep(20).then(() => {
+ loopFrame.continueLoop();
+ });
+ } else {
+ loopFrame.breakLoop();
+ }
+ })
+ .then(() => {
+ frame.finish(result);
+ });
+ });
+ return frame.result();
  }
 
  /**