Diff of OpenGL/BPO

• The added line is THIS COLOR.
• The deleted line is THIS COLOR.
• Go to OpenGL/BPO.

TITLE:OpenGL/BPO(Pixel Buffer Object)
TITLE:OpenGL/BPO (Pixel Buffer Object)

- OpenGL pixel buffer object
--  http://prog3.com/sbdm/blog/dreamcs/article/details/7708018

* glReadPixels [#glReadPixels]

- glReadPixels
--  https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glReadPixels.xml