I am reading Chapter 8 "Drawing Pixels, Bitmaps, Fonts and Images" of the red book OpenGL Programming Guide (5th edition).
I'd like to do the following:
- 1. Read a typical internet image (gif, jpg, png, etc)
- 2. Display it on WebGL
- 3. Do some manipulations on the image
- 4. Read back the new (manipulated) image
- 5. Save the new image into gif, jpg or png
Where can I find a sample code and/or document to do (some of the) above?
Thanks in advance for your help.