TODO.md

TODO

3. plot sampling uvs = done

4. transform uvs of sampler_t = done

5. can make an optimized render node for rectangles: interleaved(one upload call) and constant ebo = DONE

6. maybe create a GVA - generic vertex attribute system = DONE

7. shader compositor_t = DONE

8. general texture sampler_t = DONE

9. basic blending = done

10. basic compositing = done

11. test idea with backdrop sampling read = done

12. attach_shaders, update_shaders, ctors - DONE

13. static pool for main programs - DONE

14. murmur hashcode - DONE

15. compositing is a canvas state - DONE

16. circle sampler - DONE

17. rounded rect_i sampler - DONE

18. masking sampler - DONE

19. draw mask - DONE

20. draw arc - DONE

21. draw pie - DONE

22. quadrilateral - DONE

23. line gradient - DONE

24. fast 2 colors gradient - DONE

25. circle gradient - DONE

26. angular gradient - DONE

27. capsule shape sampler - DONE

28. linear classifier sampler - DONE

29. test idea of missing uvs coords for triangle batches - DONE

30. render node for triangle batches - DONE

31. draw polygons - DONE

32. draw paths fills - DONE

33. draw stroke fills - Done

34. bezier patches - done

35. draw text, bitmap fonts - done

36. tint sampler - done

37. draw lines - done

38. test gldrawArrays for non-indexed - done

39. convex/fan dont need to allocate indices buffer - done

40. clean up other_functions from samplers - done

41. const_cast with fake const samplers to catch rval refs without overloading - done

42. add docs for canvas functions - done

43. compatibility with older than 3.0 opengl (attributes in/out, texture/2d etc...) - done

44. debug mode - done

45. glsl versioning - wip

46. create mix sampler

47. filter sampler

48. checkerboard sampler

49. https://stackoverflow.com/questions/327642/opengl-and-monochrome-texture

50. AA with rbos

51. convert refs to pointer template so we can forward besides pointer to multi sampler

52. text measure compute

53. draw text, sdf version

54. explore drawing 3d objects, might need new shader type and pool and render node

tests:

1. test canvas with injected texture

optimizations:

1. lazy back buffers_type. also, if taregt is requested as premul alpha, normal blending and any of the porter-duff, we can use opengl blending.

NOTES:

• all samplers should be linear space. If one is pre-mul like a texture, then use an unmul sampler
• branch in vertex shader for made-up uvs for traingles if not present
• backdrop uvs should be calculated in place
• We can compute mip-maps at client side and the mip level at client side, because, the mip level is uniform accros because it is 2d and aligned except for quadrilaterals where there is a twist and the sampling rate is varying. https://www.reddit.com/r/opengl/comments/3cdg5r/derivation_of_opengls_mipmap_level_computation/
• all textures should be pre-multiplied alpha
• all other samplers should be un-multiplied
• backdrop texture does not need interpolation and min filter, therefore it can be mul/unmul alpha
• if your texture uses any filter/interpolation and it has transperency, you need it to be alpha-mul
• canvas inherits the alpha-stat of it's texture
• opengl textures are top=1.0, bottom=0.0

OPTIM:

• if normal blend-mode and any porter-duff and canvas is pre-mul stat, then you can skip backdrop texture and do it all in open-gl