pathfinder

Author	SHA1	Message	Date
Patrick Walton	f607b607b0	Composite render targets using tiles, taking the Z-buffer into account. We can do more tile-based optimization, but this should be enough to ensure a correct rendering. This temporarily breaks subpixel AA, but it should be fixable by modifying `blur.fs.glsl`. Closes #271.	2020-03-02 20:10:10 -08:00
Patrick Walton	1deb53fa9c	Implement the remaining Porter-Duff compositing operators	2020-02-25 18:37:23 -08:00
Patrick Walton	5421525eaa	Implement the HSL filters (called "non-separable blend modes" in the spec). These cannot be implemented with the standard OpenGL blending functions, so we have to do them manually in a shader, which requires a good deal of machinery to create intermediate framebuffers and so forth.	2020-02-24 15:37:44 -08:00
Patrick Walton	16a2de88df	Rename "postprocessing" to "effects" and start initial work on composite ops	2020-02-20 14:22:07 -08:00