[PDFBOX-3175] PDFTextStreamEngine probably miscalculates text height

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.0
• Component/s: Text extraction
• Flags: Patch
• Assignee: Tilman Hausherr
• Reporter: Leo
• Created: 30/Dec/15 01:40
• Updated: 17/Mar/16 19:07
• Resolved: 06/Jan/16 20:57

Description

When parsing a PDF document, TextPosition is created with constant text height, about 2 time smaller than character width, regardless of font size.
The following workaround to calculate dyDisplay fixes the issue:

float verticalScaling = 1/1000f;
if (font instanceof PDType3Font)

{ Matrix fontMatrix = font.getFontMatrix(); verticalScaling = fontMatrix.getValue(1, 1); }

float dyDisplay = bbox.getHeight() * fontSize * verticalScaling;

Issue Links

• relates to: PDFBOX-3062 Text extraction and height different in 2.0
• relates to: PDFBOX-2508 Text extraction getting zero font height, bad widths, and ? for text in this PDF with Type 3 Fonts