set dots per meter on image when drawing text

Fixes #1805
2021-12-29 10:01:01 -08:00
parent 3c95ff7ac8
commit 1fedcf628f
1 changed files with 6 additions and 0 deletions
@@ -117,7 +117,13 @@ void TextGenerator::GenerateFrame(FramePtr frame, const GenerateJob& job) const
  QImage img(frame->width(), frame->height(), QImage::Format_Grayscale8);
  img.fill(Qt::transparent);

+  // 72 DPI in DPM (72 / 2.54 * 100)
+  const int dpm = 2835;
+  img.setDotsPerMeterX(dpm);
+  img.setDotsPerMeterY(dpm);
+
  QTextDocument text_doc;
+  text_doc.documentLayout()->setPaintDevice(&img);

  // Set default font
  QFont default_font;