Hello,
We noticed that when a small chart uses disproportionally large fonts a StackOverflowError occurs.
This behavior can be seen in the latest Aspose Slides for Java version 20.3, the attached "Chart_OverflowErr.pptx” file and the following Java code:
final String pptxFile = [PATH] + "Chart_OverflowErr.pptx";
final String pdfFile = pptxFile.replace(".pptx", ".pdf");
Files.deleteIfExists(Paths.get(pdfFile));
Presentation ppt = new Presentation(pptxFile);
ppt.save(pdfFile, SaveFormat.Pdf);
System.out.println("Saved PDF File: " + pdfFile);
Running the above code should produce a StackOverflowError with the following (partial) stack:
Exception in thread "main" java.lang.StackOverflowError
at com.aspose.slides.internal.ey.throws.do(Unknown Source)
at com.aspose.slides.c5.do(Unknown Source)
at com.aspose.slides.an9.do(Unknown Source)
at com.aspose.slides.an9.do(Unknown Source)
at com.aspose.slides.an9.do(Unknown Source)
at com.aspose.slides.an9.do(Unknown Source)
at com.aspose.slides.an9.<init>(Unknown Source)
at com.aspose.slides.TextFrame.do(Unknown Source)
at com.aspose.slides.TextFrame.do(Unknown Source)
at com.aspose.slides.TextFrame.else(Unknown Source)
at com.aspose.slides.anv.do(Unknown Source)
at com.aspose.slides.ais.new(Unknown Source)
at com.aspose.slides.c7.byte(Unknown Source)
at com.aspose.slides.q0.catch(Unknown Source)
at com.aspose.slides.q0.catch(Unknown Source)
at com.aspose.slides.q0.catch(Unknown Source)
. . . [remaining 1008 stack items omitted]
Key Observations:
-
Width & Font Size: The culprit seems to be related to the chart’s width vis-à-vis the font sizes of its Legend and vertical axis labels.
In the attached PPTX:- The chart’s width is small at 2.08 inches
- The font size of the chart’s Legend and vertical axis labels is disproportionately large at 18 pts.
-
Workarounds: to circumvent the StackOverflowError:
- Increase the chart’s width to as little as 2.11". - or -
- Keep the current chart width (2.08"), but reduce the font size of the Legend and Vertical Axis labels to 12 pts.
-
Fixed Presentation: If you run the code, but using the attached
Chart_OverflowErr_fixed.pptxfile, theStackOverflowErrordoes not occur. This Presentation is nearly identical toChart_OverflowErr.pptx, but the font sizes used in the chart are reduced to 12 pts (from 18 pts).
Environment Details:
- Aspose Slides for Java 20.3
- Java version 1.8.0_211
- Windows 10 OS (but also reproducible under Linux).
File description in the Chart_OverflowError.zip (102.0 KB) attachment:
- Chart_OverflowErr.pptx: Presentation to be converted to PDF.
- Chart_OverflowErr_fixed.pptx: Identical to Chart_OverflowErr.pptx but the font sizes in the chart are reduced.
-
Chart_OverflowErr_fixed.pdf: PDF file generated in our environment when
Chart_OverflowErr_fixed.pptxis used.
Thank you!