5 commits

Author	SHA1	Message	Date
Elias Naur	8fab45544e	shader: implement clip paths ... Expand the the final kernel4 stage to maintain a per-pixel mask. Introduce two new path elements, FillMask and FillMaskInv, to fill the mask. FillMask acts like Fill, while FillMaskInv fills the area outside the path. SVG clipPaths is then representable by a FillMaskInv(0.0) for every nested path, preceded by a FillMask(1.0) to clear the mask. The bounding box for FillMaskInv elements is the entire screen; tightening of the bounding box is left for future work. Note that a fullscreen bounding box is not hopelessly inefficient because completely filling a tile with a mask is just a single CmdSolidMask per tile. Fixes #30 Signed-off-by: Elias Naur <mail@eliasnaur.com>	2020-10-09 13:20:26 +02:00
Elias Naur	dceb0f9412	piet-gpu-types: remove unused annotated types ... Signed-off-by: Elias Naur <mail@eliasnaur.com>	2020-09-21 10:55:58 +02:00
msiglreith	1cc5c7ac0d	Shader documentation and a slight cleanup	2020-06-28 15:37:27 +02:00
Raph Levien	6db4e20bbb	More parallel backdrop propagation ... This is a nice improvement but still not great on tiger.	2020-06-06 08:23:40 -07:00
Raph Levien	af0a1af8e1	Make fills work ... The backdrop propagation is slow but it does work.	2020-06-05 22:40:44 -07:00