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2022-05-01til_fb: add draw flags for controlling texturabilityVito Caputo
Just adds TIL_FB_DRAW_FLAG_TEXTURABLE so callers can granularly inhibit texturing if desired.
2022-05-01til_fb: introduce a fragment texture sourceVito 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.
2022-05-01modules/*: make use of generic fragmentersVito Caputo
Just one case, modules/submit, was using 32x32 tiles and is now using 64x64. I don't expect it to make any difference. While here I fixed up the num_cpus/n_cpus naming inconsistencies, normalizing on n_cpus.
2022-04-27til_fb: til_fb_fragment_t.{pitch,stride} uint32_t unitsVito 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.
2022-04-25modules/blinds: add count and orientation settingsVito Caputo
This adds count=N and orientation={horizontal,vertical} settings. Which was precipitated by the introduction of a vertical blinds mode. e.g.: --module=blinds,count=32,orientation=vertical or for a quick tour of the possibilities: --module=rtv,channels=blinds,duration=1,context_duration=1,snow_duration=0 weeeee
2022-04-25modules/*: set TIL_MODULE_OVERLAYABLE where appropriateVito Caputo
In the interests of facilitating randomized automagic layered compositing, tell the world when you're overlay-appropriate.
2022-04-19modules/blinds: add simple 80s-aesthetic window blindsVito Caputo
This isn't super interesting but I might just start adding simplistic overlay style modules for compositing/transition use.
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