Leo created PDFBOX-3175:
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Summary: PDFTextStreamEngine probably miscalculates text height
Key: PDFBOX-3175
URL: https://issues.apache.org/jira/browse/PDFBOX-3175
Project: PDFBox
Issue Type: Bug
Components: Text extraction
Affects Versions: 2.0.0
Reporter: Leo
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;
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