What are the important topics to study in computer graphics?

#-Link-Snipped-#‍ Hi Shubham, are you asking with respect to a competitive exam or for general as an engineering subject? If you describe the question a bit further, that will help us give you better answers.

In general, the most important topics in the computer graphics subject are -

1. Raster scan systems
2. Random scan systems
3. Line drawing, midpoint, ellipse algorithms
4. Flood-fill and Boundary-fill algorithms
5. 2D Geometrical transforms and 3D geometrical transforms
6. 2D Viewing (Cohen-Sutherland and Cyrus-beck line clipping algorithms, Sutherland –Hodgeman polygon clipping algorithm)
7. 3D Object representation (Hermite curve, Bezier curve and B-spline curves, Bezier and B-spline surfaces etc.)
8. Design of animation sequence,  keyframe systems, motion specifications etc.

These are the topics generally taught to computer science engineering students in syllabuses across India.