I wanted to know what drawing methodology is used by qgis renderer like gdi,gdi++ or opengl. I have searched its documentation http://qgis.org/api/classQgsMapRendererJob.html http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/composer.html but didnt found any methodology used by its renderer for drawing.


It uses Qt, which abstracts away specific platform-specific technologies.

Note that you can download and build the source yourself, so you have full visibility into the detailed implementation of QGIS. Similarly, you can build Qt from source, and examine that.

  • i am asking about rendering maps. Like when you load shape file then how that data is rendered on qgis? – user2174920 Nov 23 '15 at 8:17
  • The source code is authoritative. – BradHards Nov 23 '15 at 21:24

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