4338 Commits

This Branch

This Branch

All Branches

Author	SHA1	Message	Date
Thomas Harte	518c134348	Blank lines are missing (if the double negative can be forgiven) but the framebuffer is otherwise seemingly working well again.	2016-02-20 00:11:23 -05:00
Thomas Harte	a3432120f3	Fixed synchronisation — my two fields weren't of equal length, I wasn't breaking calls to the CRT upon 40/80 transitions, I had the wrong maximum run length. Now I just need to put real pixels back in.	2016-02-19 23:57:57 -05:00
Thomas Harte	1954f7bcbd	Got back to a stable image, at least when staying in a mode. Which is what I was trying to fix. Hmmm.	2016-02-19 23:41:09 -05:00
Thomas Harte	dce1649fc5	Commuted some camelCase variables into more standard C++ underscore names; decided the best fix for the graphics output is to break it down into much simpler chunks. output_pixels is currently a placeholder that simply outputs blank so the current effect is that all data is missing but it should be easy enough now to put pixels back in.	2016-02-18 23:23:49 -05:00
Thomas Harte	570d88a876	Added a simple metric for measuring surprise. Which will hopefully allow me to reimplement PAL/NTSC auto-selection for the Atari 2600.	2016-02-18 23:22:06 -05:00
Thomas Harte	c7f54d649e	Switched back down to two samples per pixel. Though one might do it. Need to investigate.	2016-02-18 23:21:25 -05:00
Thomas Harte	ce3c098c28	Widened beam a little, moved to a linear approximation of age across scans, cut number of stored frames.	2016-02-16 21:48:09 -05:00
Thomas Harte	3ea0d04a1a	-dealloc now blocks until all audio queue buffers are no longer playing.	2016-02-16 21:47:23 -05:00
Thomas Harte	b261e86c62	Reintroduced lateral as a parameter in CRT drawing, to simulate a rounded raster.	2016-02-16 20:37:04 -05:00
Thomas Harte	0b5417ab44	Made an attempt to put interrupts in the correct places regardless of even/odd field.	2016-02-16 20:36:19 -05:00
Thomas Harte	bbffbb5dc2	Resolved deadlock if an invalidate call was sent to the Electron while it was in the middle of an update.	2016-02-16 20:35:45 -05:00
Thomas Harte	a01f90ff3e	Attempted a switch to the real PAL visible area and to something a bit like a real phosphor decay.	2016-02-14 21:57:23 -05:00
Thomas Harte	7580d192d5	Fixes: now setting correct frame time estimate, properly enabling the timestamp attribute, and ensuring that the Electron flushes screen work at least once per host frame update.	2016-02-14 19:28:02 -05:00
Thomas Harte	752db78431	No doubt still imperfect but killed the repeated whole texture uploads.	2016-02-13 23:55:02 -05:00
Thomas Harte	697e50c0cc	Screen output is back, no matter how inefficiently.	2016-02-13 23:50:18 -05:00
Thomas Harte	d0b2d840da	A minor fix to data queuing. Display still absent.	2016-02-13 20:57:41 -05:00
Thomas Harte	7bd237193d	Edged closer towards realistic timing.	2016-02-13 20:52:35 -05:00
Thomas Harte	eeb0e134fd	Started the transition towards a more natural collection of rolling buffers, with phosphor decay in mind.	2016-02-13 20:52:23 -05:00
Thomas Harte	f57d6d350b	Fixed uninitialised error and incorrect default constructor.	2016-02-12 22:35:16 -05:00
Thomas Harte	fd2d5c78f8	Started trying to nudge towards the multistage approach to video decoding.	2016-02-12 22:31:05 -05:00
Thomas Harte	7bc5a43c36	Fixed type warning.	2016-02-12 22:30:22 -05:00
Thomas Harte	0527888b15	Endeavoured to ensure safe shutdown.	2016-02-12 22:30:06 -05:00
Thomas Harte	0a09762be6	Fixed output precision compared to the new approach of trusting the flywheel for position, and eliminated fixed-Acorn constants. Also re-enabled the faded previous frame, at least temporarily.	2016-02-12 19:53:49 -05:00
Thomas Harte	341fafd3c5	Adjusted visible area.	2016-02-12 19:52:04 -05:00
Thomas Harte	1d20a29d97	Made an attempt to switch to the flywheels for both vertical and horizontal sync, and to act more appropriately for out-of-bounds sync requests. Lots of tweaking to do, I fear.	2016-02-11 23:43:08 -05:00
Thomas Harte	c81891ec43	Minor tidying and at least acknowledged the new flywheel encapsulation.	2016-02-11 22:13:38 -05:00
Thomas Harte	86017de1fb	Fixed field timing. It's 312.5 lines now, closer to the PAL standard.	2016-02-11 22:12:37 -05:00
Thomas Harte	a6574d1f96	Made an attempt to factor out and more clearly to document my implementation of flywheel synchronisation.	2016-02-11 22:12:12 -05:00
Thomas Harte	c66409421e	Switched to generating an interlaced output, that apparently being correct. Enabled a poor man's version of phosphor persistence to smooth things out a little. It's not completely unconvincing.	2016-02-10 23:11:25 -05:00
Thomas Harte	b5bcadb8d3	Reinstated clipped CRT output, with more appropriate ownership of the decision.	2016-02-07 22:18:55 -05:00
Thomas Harte	3a689d14cc	Added padding of supplied data to correct for any potential rounding errors when rendering.	2016-02-07 20:29:32 -05:00
Thomas Harte	3a9ea66f8b	Filled in shader class.	2016-02-07 19:21:22 -05:00
Thomas Harte	4d0a218a57	Certainly at least seriously considering a separate holder for the "compile a shader" logic. Otherwise taking steps back towards PAL/NTSC decoding.	2016-02-07 17:32:38 -05:00
Thomas Harte	602327cd9d	Sketched out a quick class for rendering to texture.	2016-02-07 15:42:02 -05:00
Thomas Harte	2e3ba6bbb2	Removed some logging.	2016-02-07 14:42:40 -05:00
thomasharte	2cb12a7513	Allowed overly aggressive allocations to be cleared up after the fact.	2016-02-06 16:07:23 -05:00
Thomas Harte	d3d505b7bc	That's one header file less.	2016-02-05 23:05:58 -05:00
Thomas Harte	bf348ccb96	Fixed clearing logic.	2016-02-05 22:47:12 -05:00
Thomas Harte	6ab425deda	There is now a semi-reasonable amount of screen output again.	2016-02-05 21:35:39 -05:00
Thomas Harte	80e7e5e602	Updated to return old behaviour of drawing only upon changes.	2016-02-04 23:05:47 -05:00
Thomas Harte	8bc3f8046d	This endeavours to move everything into the CRT class except the final version of shader building.	2016-02-04 22:57:46 -05:00
Thomas Harte	e0d51408e4	Onward with carrying this through to the bitter end, this at least results in all the appropriate knowledge and call-ins occuring at the CRT.	2016-02-04 22:28:50 -05:00
Thomas Harte	09e11469c3	Simplified further: eliminated delegate. Which means I can go frame-free internally to the CRT at some point, if I want.	2016-02-03 19:11:18 -05:00
Thomas Harte	19393390ac	It's broken now, but this is what I now intend the full public interface of the CRT to be.	2016-02-02 22:41:33 -05:00
Thomas Harte	4554abb755	Made an attempt to be more rigorous in display generation on the Electron, to make sure I deal with mid-line changes to/from blank line mode. Even if it turns out that they generate pixels.	2016-01-29 21:14:13 -05:00
Thomas Harte	adc6838ba0	Continued slow migration of shader ownership to CRT. Attempted to start debugging the tape interface.	2016-01-27 21:35:57 -05:00
Thomas Harte	96c946b8af	Made a very basic attempt to emulate tape output.	2016-01-24 18:20:55 -05:00
Thomas Harte	1819e7b9cc	Started sketching out an appropriate interface to transfer responsibility for shaders to the CRT.	2016-01-23 19:06:32 -05:00
Thomas Harte	ace331d4b4	Got a bit higher level in CRT timing specification. Which internally allows it now to infer the colour clock frequency. Which will be helpful momentarily.	2016-01-23 18:53:20 -05:00
Thomas Harte	a9e26d7808	Introduced a scan's delay, as intended.	2016-01-23 17:49:25 -05:00