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Draft: d3d11: Implement d2d/dwrite based text overlay elements

Seungha Yang requested to merge seungha.yang/gstreamer:d3d11-text-overlay into main

d3d11: Implement d2d/dwrite based text overlay elements

Adding hardware-accelerated text rendering elements and a new GstMeta for text to be rendered at final rener stage.

This patch consists of:

  • GstMeta implementation to convey a text rendering information (such as font and formatted text with user defined color), so that the formatted text can be rendred at the final render target suface
  • A baseclass for text rendering with timeoverlay implementation
  • A custom DirectWrite text render implementation to support various custom features
  • Modifying d3d11videosink to support text rendering
Edited by Seungha Yang

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