Subdividing geometry images in graphics hardware
A system may include a graphics memory, a data bus, a processor, and a vertex shader. The data bus may be operatively connected to the graphics memory. The processor may send vertex data to the graphics memory via the data bus. The vertex shader may read the vertex data from the graphics memory and may subdivide the vertex data into subdivided vertex data. The vertex shader may also write the subdivided vertex data to the graphics memory.
1. An apparatus comprising:
a memory; and
a shader, when operational, to subdivide vertex data and to store the subdivided vertex data to the memory, said shader, when operational, to selectively perform another subdivision based in part on display resolution.
2. The apparatus of claim 1 wherein said shader is a vertex shader.
3. The apparatus of claim 2 wherein said vertex shader is a butterfly technique vertex shader.
4. The apparatus of claim 2 wherein said vertex shader uses loop technique subdivision.
5. The apparatus of claim 2 wherein said vertex shader uses Doo-sabin technique subdivision.
6. The apparatus of claim 2 , said shader to subdivide vertex data differently than other data.
7. The apparatus of claim 6 , said shader to subdivide vertex data more than other data.
8. The apparatus of claim 6 , said shader to subdivide vertex data differently than texture, normal, or color coordinate data.
9. The apparatus of claim 1 including a processor coupled to said memory, said shader to subdivide data after the data has been transferred from the processor to the memory.
10. A method comprising:
subdividing vertex data;
storing the subdivided vertex data to a memory; and
selectively performing another subdivision based in part on display resolution.
11. The method of claim 10 including using a vertex shader to subdivide vertex data.
12. The method of claim 11 including subdividing using a butterfly technique.
13. The method of claim 11 including subdividing using a loop technique.
14. The method of claim 11 including subdividing using a Doo-sabin technique.
15. The method of claim 10 including subdividing vertex data differently than other data.
16. The method of claim 15 including subdividing vertex data more than other data.
17. The method of claim 15 including subdividing vertex data differently than texture, normal, or color coordinate data.
18. The method of claim 10 , said subdividing vertex data after the data has been transferred from a processor to a memory.
19. A non-transitory computer readable medium storing instructions executed by a computer to:
subdivide vertex data;
store the subdivided vertex data to a memory; and
selectively perform another subdivision based in part on display resolution.
20. The medium of claim 19 further storing instructions to use a vertex shader to subdivide vertex data.
21. The medium of claim 20 further storing instructions to subdivide using a butterfly technique.
22. The medium of claim 20 further storing instructions to subdivide using a loop technique.
23. The medium of claim 20 further storing instructions to subdivide using a Doo-sabin technique.
24. The medium of claim 19 further storing instructions to subdivide vertex data differently than other data.
25. The medium of claim 24 further storing instructions to subdivide vertex data more than other data.
26. The medium of claim 24 further storing instructions to subdivide vertex data differently than texture, normal, or color coordinate data.
27. The medium of claim 19 further storing instructions to subdivide vertex data after the data has been transferred from a processor to a memory.