140 Commits

Author	SHA1	Message	Date
Thomas Harte	7d60df9075	Added the option for both intermediate and output shaders to use only a portion of the input/output texture; made an attempt to pick an appropriate proportion in order to align signal sampling with the colour subcarrier.	2017-01-03 22:16:52 -05:00
Thomas Harte	34d213dec4	Decreased Y resolution, again also hopefully temporarily.	2016-12-10 15:35:38 -05:00
Thomas Harte	7c85cb62e4	Moved underscores, removed indirections where they're not necessary, converted those names that were still looking very Objective-C and moved the GL fence variable into the private area, where it should always have been.	2016-11-21 12:14:52 +08:00
Thomas Harte	e1285028aa	Removed a redundant clear and some dead code.	2016-11-21 11:42:45 +08:00
Thomas Harte	7b38247ab3	Updated outdated comments.	2016-11-21 11:40:13 +08:00
Thomas Harte	d7d0ed378a	Only the final intermediate buffer needs clearing, on reflection.	2016-11-21 11:26:07 +08:00
Thomas Harte	32dbfe947d	With hindsight, the elimination of this might have been overzealous.	2016-11-20 10:53:35 +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	6ac20e0066	Pushed responsibility for submitting texture contents up to the texture builder, simplifying the interface.	2016-11-16 23:13:06 +08:00
Thomas Harte	5c5e44874f	Even better: why include the 'Input' prefix when there's only one?	2016-11-16 22:57:17 +08:00
Thomas Harte	4d0d5eb919	Renamed the 'input buffer builder' to the 'input texture builder' to be explicit about what sort of buffer, and killed the prefix since it's namespaced. Also switched to std::vector.	2016-11-16 12:31:32 +08:00
Thomas Harte	4ee4400801	Removed dead code.	2016-11-16 11:57:22 +08:00
Thomas Harte	44d3fd6d5b	Fixed mistimed reset of the target output line. Now all that's left is occasional noise.	2016-11-16 11:22:12 +08:00
Thomas Harte	7a737e0790	Both pathways start with a buffer that clears to black. So no need to keep going on about it.	2016-11-16 11:12:08 +08:00
Thomas Harte	f63e849092	Sought completely to eliminate the outgoing concept of 'clearing zones'.	2016-11-16 11:10:34 +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	ccedb6bea6	Introduced an intermediate buffer that collects lines before flushing them to the output buffer.	2016-11-16 10:49:18 +08:00
Thomas Harte	ba2adf8bb1	Normalised on std::vector rather than std::unique_ptr<uint8_t *> as (probably?) more idiomatic. Improved structure slightly. Introduced a container for line data, albeit one that isn't yet used.	2016-11-16 10:34:54 +08:00
Thomas Harte	eefd0c17b6	Actually, I guess that to fulfil the contract I can't silently decide not to draw if I'm being told I definitely need to draw.	2016-07-01 16:27:45 -04:00
Thomas Harte	4ac619f569	glClientWaitSync appears to be a busy wait, at least on my machine. But why wait indefinitely anyway?	2016-06-29 21:32:47 -04:00
Thomas Harte	ff53accca0	Demonstrated that issue is coloured borders, made a guess as to buffer exhaustion, upped limits as a temporary fix.	2016-06-29 21:16:34 -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	2992183aae	Switched to a lookup table for phase, temporarily in YUV colour space, probably. Working on it.	2016-06-12 14:39:17 -04:00
Thomas Harte	68a8851c52	Increased parallelism, allowing a simplification in the GL view.	2016-06-02 22:29:09 -04:00
Thomas Harte	8d52765f40	Realised why new shaders weren't taking. Very negligibly decreased Atari drawing cost.	2016-05-12 22:22:24 -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	0d2d6a452d	Fixed some dangling buffer management issues.	2016-05-10 19:55:34 -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	47ae402f7e	Introduced a shorthand for setting up array attributes.	2016-05-10 19:11:48 -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	daec21d3d8	Found and fixed off-by-one error. Display should now be completely fixed.	2016-05-09 21:14:59 -04:00
Thomas Harte	7e2bd78891	With an eye towards instancing, moved away from circular buffers.	2016-05-09 19:14:30 -04:00
Thomas Harte	45af963b9a	Moved more of the circular logic inside getCircularRanges in order to eliminate one more potential source of error.	2016-05-09 07:34:37 -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	1a214a8308	Fence sync tied up. Remaining glitches are likely off-by-one-type errors but we'll see.	2016-05-08 19:45:36 -04:00
Thomas Harte	ef3b91d3aa	Made an attempt to get formal on synchronisation.	2016-05-08 19:42:33 -04:00
Thomas Harte	dd469fe83a	Switched back to normal frame drawing logic and cleaned up the circular range stuff a little, to make it clear that no errors lie there.	2016-05-08 18:50:30 -04:00
Thomas Harte	ccdbec3ffc	Corrected for potential lost lines.	2016-05-08 16:43:11 -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	c73751b15a	Reverted deliberately broken segments to produce something mergeable.	2016-05-05 21:27:13 -04:00
Thomas Harte	a74f081aa9	Put lateral lookup table directly into the shader.	2016-05-05 21:21:27 -04:00
Thomas Harte	8284b272ad	Picked appropriate new-world values for various buffers.	2016-05-05 20:00:28 -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	f621cc8523	Withdrew the pixel unpack buffer in order to avoid the potential for a paused machine to be undrawable. The cost is at least an extra memcpy per frame; I'm letting the driver worry about the whole process for now.	2016-05-04 21:27:10 -04:00
Thomas Harte	2e7ac0e6db	With a lot of logging also currently ongoing, fixed circular ranges for clearing and when covering an entire buffer.	2016-05-04 21:08:38 -04:00
Thomas Harte	3684c6404f	Proven through deliberate inefficiency: the issues are (i) texture upload; and (ii) buffer wraparound.	2016-05-03 22:22:12 -04:00