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2021-10-01*: librototiller->libtilVito 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_.
2021-02-16*fb: plumb outer fb_t down to fb_ops_t methodsVito Caputo
None of the existing fb_ops_t implementations need this, but due to how GTK+ works, the GTK+ frontend using librototiller will likely want to wire up calling fb_flip() on the fb from behind fb_ops.
2021-02-14*fb: improve error propagation out of setup/initVito Caputo
A lot of errors were being conflated as ENOMEM due to the lazy use of NULL pointer returns for errors. This commit reworks a handful of those return paths to instead return an errno-style int, storing the results on success at a supplied result pointer. It's kind of ugly, and I make some assumptions about libdrm setting errno on failure - it too uses this lazy API of returning NULL pointers on failure. Hopefully errno is always set by an underlying ioctl failing. The SDL error API is also pretty gross, being cross-platform it defines its own error codes so I try vaguely map these to errno values. I'm considering this a first approximation at fixing this up, but there are probably bugs as I did it real fast and nasty. It at least seems to all still work OK here in the non-error paths I tested. So it doesn't seem more broken than before at a glance.
2021-02-14drm_fb,sdl_fb: staticify all functionsVito Caputo
Some omissions, nothing in these is public outside of what's explicitly plumbed out via fb_ops_t.
2020-09-13sdl_fb: use SDL_CreateRGBSurface() insteadVito Caputo
I was using SDL_CreateRGBSurfaceWithFormat() without considering the minimum SDL2 version implications. Switch to SDL_CreateRGBSurface() as there's no relevant difference, so I can lower the minimum SDL2 version in configure.ac.
2019-11-24fb: add pitch to fb_fragment_tVito Caputo
The put_pixel helpers really needed reworking to properly handle subframe fragments modules like montage will utilize. I had the stride present as it's convenient for a number of modules that maintain a buf pointer as they progress down a row, but the pitch is more applicable to put_pixel for scaling the y coordinate. Now there's both pitch and stride so everyone's happy with what's most convenient for their needs.
2019-11-15sdl_fb: use setting_desc_check()Vito Caputo
2019-11-10settings: s/setting_desc_new/setting_desc_clone/Vito Caputo
Slight refactor to make call sites less annoying. Now takes a (setting_desc_t *) instead of the members as discrete parameters, and returns an errno on error so callers can simply propagate error codes out rather than having to get access to errno defines, check for NULL and return -ENOMEM etc. It also makes the call sites self documenting by employing designated initializers in compound literals for the supplied setting_desc_t. This is in prep for runtime-configurable module settings.
2018-02-26sdl_fb: add fullscreen= and size= settingsVito Caputo
fullscreen takes either "on" or "off" size expects WxH arguments, defaults still to 640x480 size is optional when fullscreen=on. Through the setup machinery, when fullscreen has been selected it will not ask for a size - a "fullscreen desktop" mode is presumed. However, thorugh the explicit commandline flags, a mixed mode can be achieved by specifying both "fullscreen=on,size=WxH". This instructs SDL to attempt a video mode switch to the specified size if needed. I've found it to be pretty unreliable on my Xorg/linux system, unless I choose the same video mode as my desktop is already in. Then I get what looks like rendering into the root window or something, it's weird. Hence there's no effort made to expose that in the interactive setup, but it's technically possible and some effort was made to wire it up.
2018-02-26sdl_fb: jump through SDL_Main() hoopsVito Caputo
Since I don't use the SDL event loop, this needs to be done to keep things happy apparently.
2018-02-26sdl_fb: drain event queue on page flipVito Caputo
2018-02-22fb,settings,drm_fb,sd_fb: const settings_t readersVito Caputo
The fb_ops entrypoints and their descendants are purely readers of the settings, so constify their settings_t instances and the operative functions which only read settings.
2018-02-22sdl_fb: implement rudimentary sdl fb backendVito Caputo
This uses a simple fixed 640x480 windowed mode (for now). The SDL2 Renderer & Texture API is used for vsync-synchronized presents. There's probably excessive copying going on because the rototiller fb code manages pages and flips but SDL2 doesn't really expose low-level control of such things. This backend is quite useful for development purposes, allowing quick iteration in a windowed environment. Note this is just the backend implementation, it's dormant code but trivially activated.
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