83 Commits

Author	SHA1	Message	Date
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	0fee8096c1	Made an attempt to shuffle the texture builder to a similar flush/submit pattern as the input builder. Don't care about thread safety yet, as it's obvious I'm going to need to move that back up to the CRT.	2016-12-06 07:24:07 -05:00
Thomas Harte	0edc043378	Started introducing an extra layer of indirection so as to be able to bind the texture builder to the same flush and submit patern as the array builder.	2016-12-03 20:47:19 -05:00
Thomas Harte	cb3c837e30	Simplified interface by baking in last-minute-only updates.	2016-12-03 18:19:12 -05:00
Thomas Harte	5bc165960a	Completed refactoring.	2016-11-20 09:12:06 +08:00
Thomas Harte	aca1fa0577	Returned some video output. Enough significantly to reduce my paranoia.	2016-11-17 13:37:53 +08:00
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	6cb4950db4	Improved run-off area.	2016-11-16 11:53:15 +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	294adde344	Eliminated zoned clearing, in favour of a complete buffer clear on each load and attempted to reduce locking. But imperfectly.	2016-11-16 10:59:12 +08:00
Thomas Harte	c628b7c5c5	This is the real PAL frequency, I think.	2016-10-17 08:05:02 -04:00
Thomas Harte	2bd71e7e9b	.reset is the more normal way to reassign a unique_ptr.	2016-06-23 20:52:44 -04:00
Thomas Harte	c18cc4c8f5	It appears the Vic's output is sine-ish, after all. Also adjusted centre of display, simultaneously adding some validation on that.	2016-06-14 07:29:35 -04:00
Thomas Harte	6d65bc9b3a	Permitted a wider error window on vertical sync, tidied things up a little and started trying to move towards full implementation of the OpenGL contract.	2016-05-11 22:11:01 -04:00
Thomas Harte	4b3c4082d2	These functions appear correctly to model the NTSC and PAL palettes; the CRT's attempt to switch function doesn't work properly yet though.	2016-05-11 21:07:18 -04:00
Thomas Harte	b6d2c8cb63	Switched to instaced drawing for source[/intermediate] runs too, reducing that data transfer footprint by 50%.	2016-05-10 19:50:12 -04:00
Thomas Harte	7369139f7e	Realised that phase time can fit inside a single byte, since it's always (well) within the first quarter of the line — and if it somehow weren't (?) then taking it modulo the frequency would do.	2016-05-10 19:14:57 -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	1d0bcb416d	Dropped the size per output run back down to 8 bytes.	2016-05-10 07:47:47 -04:00
Thomas Harte	86dab3a5d6	Quickest first attempt to switch to instancing for the output array. Texture coordinates seem to be off.	2016-05-10 07:23:47 -04:00
Thomas Harte	cec9ad0dc6	Switched to a more rational interface, ensured output_level will work when eventually needed, and that neither it nor output_data attempts a recursive lock.	2016-05-09 07:02:12 -04:00
Thomas Harte	a82fa31370	Switched back to broad locking for CRT updates. To eliminate one more thing.	2016-05-09 06:58:26 -04:00
Thomas Harte	47302de23a	Switched to simpler storage for _image.	2016-05-08 21:11:56 -04:00
Thomas Harte	986019f9f9	Fixed error that could lead to split output run vertex writes.	2016-05-08 20:30:59 -04:00
Thomas Harte	9485ef2c8c	At last a genuine bug fixed: was nudging the wrong amount in intermediate shaders.	2016-05-08 16:07:36 -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	284b310074	Attempted to implement end-of-buffer tests for all stages.	2016-05-05 19:52:05 -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	fc1a67c157	Lateral is no longer written per vertex. It's a fixed list.	2016-05-03 18:45:55 -04:00
Thomas Harte	29e7c96e4c	Brought monitor mode inside the pipeline and added an intermediate filter.	2016-05-02 21:05:58 -04:00
Thomas Harte	501ab74eaf	Fixed time multiplier calculation.	2016-04-28 22:12:59 -04:00
Thomas Harte	ef3647f6cf	Being bold: per-scan timing isn't coming back, I think, so started completely removing it.	2016-04-27 23:00:43 -04:00
Thomas Harte	496d979aca	Made a decision to clean up by creating per-shader classes. Well, more or less. First thing to be factored out: the output shader.	2016-04-27 22:29:54 -04:00
Thomas Harte	416c944f02	Experimental: let's try accumulating history directly in the framebuffer.	2016-04-26 21:41:39 -04:00
Thomas Harte	6c567d166a	Fixed colour burst acceptance, switched to an integral single byte streaming of Atari colours.	2016-04-25 20:56:15 -04:00
Thomas Harte	9b64f64db7	Attempted to normalise some style decisions.`	2016-04-24 22:32:24 -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	23ce032ba1	Started edging towards the necessary flexibility for the other two intermediate shaders.	2016-04-21 20:21:34 -04:00
Thomas Harte	4b9985626d	Started commuting alpha to direction. The incoming amplitude is now honoured.	2016-04-21 19:53:41 -04:00
Thomas Harte	8232ed765e	Eliminated use of zero-alpha runs to clear new lines in the intermediate buffer in favour of a scissored glClear. It's just an easier way to scale the current approach to three intermediate buffers.	2016-04-20 20:44:25 -04:00
Thomas Harte	cf55a0c423	Fixed: composite output y is now incremented upon the start of retrace, that causing it to have different values at either edge of scans.	2016-04-18 21:49:45 -04:00
Thomas Harte	d5bac2f04f	Spotted error was in texture target all along. This now gets as far as showing something a lot like the correct display, but precision is way off. Way off.	2016-04-18 21:32:48 -04:00
Thomas Harte	9ede284eb6	Added blanking source runs, ensuring the rolling buffer is appropriately cleared.	2016-04-17 20:34:52 -04:00
Thomas Harte	323f1a24db	Introduced blackout period solution to vertical sync confusing horizontal sync. Need to find out whether it's accurate.	2016-04-14 20:30:45 -04:00
Thomas Harte	d100c755b7	The final line runs on a diagonal. Leave room for that.	2016-04-11 23:13:14 -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