8 Commits

Author	SHA1	Message	Date
nick black	02c57186b4	Stacking tests: remove cruft, this works now #1318	2021-02-04 23:52:05 -05:00
nick black	87def26efb	paint(): need invert bits not logic for stacked blitters #1068	2021-02-02 00:57:58 -05:00
nick black	39563058ca	new unit test breaks #1068	2021-02-02 00:57:58 -05:00
nick black	02d09ef47b	quadblitter: unit test for crossed quadrants #1068	2021-02-02 00:57:58 -05:00
nick black	33d9e60003	quadblitter: unit test for stacked blits #1068	2021-02-02 00:57:58 -05:00
nick black	b0915d1db6	Proper transparent blitter stacking ... This completes the work for #1068. This addressed a subtle issue. When we're using pixel->semigraphic art, we want slightly different rendering. Essentially, imagine that we have two images, each two pixels tall and one pixel wide. The top image is a transparent pixel above a white pixel. The bottom image is a white pixel above a black pixel. We'd expect the result to be two white pixels, but we can instead get a black pixel above a white pixel. This is because the *background* color is being merged from the bottom plane, but really we want the *top* color. Ncvisuals are now blitted along with information regarding which quadrants they draw over, and when appropriate, we invert the foreground and background. Closes #1068.	2021-02-02 00:57:58 -05:00
nick black	0446dc0f6d	enable blitterstacking unit test -- fails for now	2021-02-02 00:57:58 -05:00
nick black	15386d57ce	nontrivial stacking unit test #1068	2021-01-08 04:59:24 -05:00