61 Commits

Author	SHA1	Message	Date
Thomas Harte	ed8c73eb14	Ensured lengthy constant sync can't appear to be two sync pulses, regardless of other interruption.	2017-07-29 18:25:04 -04:00
Thomas Harte	3528a7f78b	Made an attempt at triggering vertical sync the expected number of time after it begins, regardless of total length.	2017-07-29 17:33:52 -04:00
Thomas Harte	54bcc40192	With an eye towards being more accurate as to vertical sync recognition: acknowledged that the detection period varies between PAL and NTSC.	2017-07-29 14:53:53 -04:00
Thomas Harte	be750ee427	Eliminated all dangling implicit signedness conversions.	2017-07-21 21:52:37 -04:00
Thomas Harte	12f7e1b804	Enshrined a default colour burst amplitude. Which now everybody relies on. The 102 figure is derived from the burst apparently being 40 IRE.	2017-07-07 23:35:14 -04:00
Thomas Harte	a5075d9eb5	Formalised the reasoning behind the colour phase fix-up and made it an opt-in per-caller value. Only the Oric currently needs to opt in.	2017-05-16 20:31:39 -04:00
Thomas Harte	e01f3f06c8	Completed curly bracket movement.	2017-03-26 14:34:47 -04:00
Thomas Harte	e63229a5e5	Pulled vertical sync detection entirely outside the loop, and gave it greater perspective.	2017-03-06 19:15:33 -05:00
Thomas Harte	ad73379d1c	Took vertical sync detection logic entirely out of the loop.	2017-03-05 20:17:55 -05:00
Thomas Harte	d19f26887d	Performed a very naive shuffling of output builder sets onto the OpenGL queue. Which makes the frequency switcher work properly from it's possibly-contextless thread.	2017-02-20 10:39:31 -05:00
Thomas Harte	6cb95b4fc5	Switched to passing around std::strings rather than char *s, because they should be easier to capture.	2017-02-20 10:35:33 -05:00
Thomas Harte	d979a822ac	Introduced a deferred task list for the OpenGL thread.	2017-02-19 21:46:07 -05:00
Thomas Harte	d0a93409e6	Made an attempt to simplify in-shader phase calculation, now that output position is a direct multiple of phase.	2017-01-11 08:18:00 -05:00
Thomas Harte	a549fd1ecc	Introduced the ability simply to piggy-back off the CRT's natural phase for the colour burst, thereby eliminating a couple of redundant independent attempts in the Oric and Electron.	2016-12-10 13:42:34 -05:00
Thomas Harte	5216dda675	Added some brief extra exposition to the texture builder, cut all internal tex_x/y and source_divider stuff from the CRT.	2016-12-06 19:08:55 -05:00
Thomas Harte	4ff33254e1	Sought to shift locking back up to the CRT. And to be a bit more RAII-ish.	2016-12-06 18:48:30 -05:00
Thomas Harte	1f91d29434	Progressed to usage of an array builder and a texture builder up to the point of a successful build.	2016-11-17 12:26:04 +08:00
Thomas Harte	0f3b02edb7	Switched to postfix underscores and gave this class ownership of a texture builder and an array builder, though it presently uses neither.	2016-11-17 11:00:11 +08:00
Thomas Harte	9ee11d7765	At the expense of API simplicity, at least for now, resolved the most glaring cause of dirty lines.	2016-11-16 11:34:05 +08:00
Thomas Harte	1f857c619b	Fixed timing issues. Static box of frame achieved!	2016-10-12 21:42:36 -04:00
Thomas Harte	257420b0f7	Fixed potential output error if buffer top were hit; clarified buffer size constants.	2016-05-10 19:04:03 -04:00
Thomas Harte	8e4ab37719	Things are back pretty much to where they were, but offset is eliminated as an input.	2016-05-07 18:37:18 -04:00
Thomas Harte	87df57195d	Started on an attempt not to treat the various buffers as free to loop within, starting with the input texture.	2016-05-04 07:39:45 -04:00
Thomas Harte	2541711061	Made attempts (i) to flush buffers before unmapping them; and (ii) to bring texture uploads within the new orthodoxy.	2016-05-03 20:56:47 -04:00
Thomas Harte	082003ed0a	Reintroduced the CRT delegate and the 2600's automatic region switching. Albeit that the CRT itself doesn't adjust properly to new timings yet.	2016-04-24 18:36:22 -04:00
Thomas Harte	80a3169674	Started reviving the Atari 2600 emulation. Put new startup sequence into place.	2016-04-24 06:56:08 -04:00
Thomas Harte	4be8053ba9	Updated documentation.	2016-04-12 22:38:49 -04:00
Thomas Harte	7276a06cc0	Added a helper to calculate a visible rect based on output timings, used it to scale the Electron output up to the full window size.	2016-04-11 21:47:23 -04:00
Thomas Harte	aa8a192c7e	Simplified API down to their being a single texture with a specified depth.	2016-03-19 17:37:55 -04:00
Thomas Harte	4ac1f959e9	A shortcut here and a shortcut there; this allows me at least to determine whether use of a PBO gains anything.	2016-03-19 17:07:05 -04:00
Thomas Harte	67dffc89e0	Stripped unnecessary includes.	2016-03-13 13:25:34 -04:00
Thomas Harte	7255408313	Experimented with going back to horizontal sync on leading edge; not sure so (temporarily?) disabled.	2016-03-08 22:54:05 -05:00
Thomas Harte	bf5747f83e	Made an attempt to chop out all the stuff of building up the OpenGL data from the stuff of parsing input.	2016-03-08 22:40:23 -05:00
Thomas Harte	14b2927275	Made further attempts to tidy up; trying to demarcate between public interface and private.	2016-03-08 20:59:16 -05:00
Thomas Harte	c7976dd657	Started trying to clean up my Outputs namespace by moving stuff related to the CRT underneath a separate subnamespace.	2016-03-08 20:49:07 -05:00
Thomas Harte	bb09a5f58c	The attribute locations don't really need to be stored. They can be transient.	2016-03-07 21:42:21 -05:00
Thomas Harte	1e5fe2b2c1	Made an attempt to reestablish the Atari 2600 output connection despite various changes (TODO: generalise that stuff), and to start creating the composite shader.	2016-03-07 21:04:04 -05:00
Thomas Harte	cd9c62acca	Still stepping slowly towards a working composite mode, switched the RGB sampling function to returning a vec4, which may be of benefit to any machine with a brightness part of an RGB signal, and started edging towards at least having the correct GLSL programs ready for converting composite output.	2016-03-07 19:08:26 -05:00
Thomas Harte	3f39803d32	Switched to triangle strips, to eliminate the need for any temporary storage for the composite output path.	2016-03-05 20:47:11 -05:00
Thomas Harte	23c223e2ed	Started edging towards completing the CPU side of accumulating enough data for composite decoding.	2016-03-05 17:55:18 -05:00
Thomas Harte	70b6d51451	Ever more baby steps back towards composite decoding.	2016-03-05 14:36:12 -05:00
Thomas Harte	7839d93344	With the provision of an extra hint to the CRT and, finally, the realisation about why my scans weren't exactly joining up, improved output precision.	2016-02-27 22:39:01 -05:00
Thomas Harte	1c6de7692d	Made an attempt to fix tape output interrupts; offloaded raster width and placing conversion to the GPU.	2016-02-27 20:37:41 -05:00
Thomas Harte	db18c85423	Simplified the run builder rather; put a double check of Electron timing in place.	2016-02-25 22:01:42 -05:00
Thomas Harte	574985f9a2	Fixed interlaced timing; switched to a more robust detector for horizontal sync; eliminated some test logging.	2016-02-20 20:29:40 -05:00
Thomas Harte	00f414d757	Made an attempt to reintroduce interlacing and screen modes with gaps. Something's wrong with synchronisation though, so most likely I'm outputting a bad signal.	2016-02-20 17:32:51 -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	697e50c0cc	Screen output is back, no matter how inefficiently.	2016-02-13 23:50:18 -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	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