rototiller/.git - Collection of software-rendered graphics hacks supporting libdrm and SDL2

Age	Commit message (Collapse)	Author
2022-05-01	til_fb: introduce a fragment texture source	Vito Caputo
	Idea here is to provide texture sources for obtaining pixel colors at the til_fb_put_pixel/fill drawing API, making it possible for at least overlayable modules to serve as mask/stencil operators where their drawn areas are populated by the contents of another fragment produced dynamically, potentially by other modules altogether. This commit adds a texture=modulename option to the compose module for specifying if a texture should be used when compositing, excepting and defaulting to "none" for disabling texturing. A future commit should expand this compose option to accept a potential list of modules for composing the texture in the same way as the main layers= list functions. Something this all immediately makes clear is the need for a better settings syntax, probably in the form of all module setting specifiers optionally being followed by a squence of settings, with support for escaping to handle nested situations.
2022-04-27	til_fb: til_fb_fragment_t.{pitch,stride} uint32_t units	Vito Caputo
	Originally it seemed sensible to make these units of bytes, for flexibility reasons. But it's advantageous for everything to be able to assume pixels are always 4-byte/32-bit aligned. Having the stride/pitch be in bytes of units made it theoretically possible to produce unaligned rows of pixels, which would break that assumption. I don't think anything was ever actually producing such things, and I've added some asserts to the {sdl,drm}_fb.c page acquisition code to go fatal on such pages. This change required going through all the modules and get rid of their uint32_t vs. void* dances and other such 1-byte vs. 4-byte scaling arithmetic. Code is simpler now, and probably faster in some cases. And now allows future work to just assume things cna always occur 4-bytes at a time without concern for unaligned accesses.
2022-04-19	*: s/til_fb_fragment_zero/til_fb_fragment_clear/	Vito Caputo
	Mechanical renaming of "zero" to "clear" throughout for this context.
2022-04-14	til_fb: copy zeroed in til_fb_fragment_tile_single()	Vito Caputo
	Oversight from when zeroed tracking was introduced in d9db26.
2022-04-13	til_fb: put back til_fb_context() accessor	Vito Caputo
	This was removed before, despite being left in the header by mistake. Putting back for glimmer's sake.
2021-10-01	*: librototiller->libtil	Vito Caputo
	Largely mechanical rename of librototiller -> libtil, but introducing a til_ prefix to all librototiller (now libtil) functions and types where a rototiller prefix was absent. This is just a step towards a more libized librototiller, and til is just a nicer to type/read prefix than rototiller_.