192 Commits

Author	SHA1	Message	Date
Thomas Harte	6f52ed14d6	Trivially fixed. Appears to confirm an off-by-one error in the television implementation. Which would explain one of the visual phenomena — a repeating corrupted line.	2016-04-19 19:32:52 -04:00
Thomas Harte	b90a487a16	Attempted to enable both monitor and television output paths in the same codebase. The television route seems to be broken. Investigation required.	2016-04-19 19:30:50 -04:00
Thomas Harte	6c9bcfa637	Got rigorous on exceptions, started working towards having a working 'composite' shader at the same time as having a working RGB shader.	2016-04-19 08:05:43 -04:00
Thomas Harte	bcc784bda9	Introduced an interface for specifying attribute bindings, taking the opportunity to document the interface and introduce exceptions.	2016-04-19 07:23:15 -04:00
Thomas Harte	9d39c14752	Nothing of substance different; main current mystery: why do old frames recur and why does other jumpiness occur? Do I need some explicit synchronistion?	2016-04-18 22:18:03 -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	9580dde3ad	Fixed left/right shuffling. Was simply failing to supply the integer version of coordinates.	2016-04-18 21:40:23 -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	bf29c8e2bf	Fixed mismatch in television/monitor selection, ticked view for drawing concurrently, since it can, removed stray space.	2016-04-18 19:01:15 -04:00
Thomas Harte	5980f5e991	Number of taps can be specified explicitly if you desire.	2016-04-17 20:45:57 -04:00
Thomas Harte	499f7ace07	Re-enabled working video output for the Electron for the day and consolidated the rough metric I'm using to pick a number of taps for the audio filter.	2016-04-17 20:43:20 -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	43cae267f9	Shuffled further in an attempt to get as far as having static but incorrectly-interpreted pixel data on screen. It's not currently static. So work to do.	2016-04-17 18:08:05 -04:00
Thomas Harte	a8fbd82a3d	Made an attempt at correctly mapping to eye coordinates.	2016-04-17 17:21:24 -04:00
Thomas Harte	ece51917fa	Added first attempt at performing the first step of television output: mapping from source data to the first of the processing buffers. It's immediately obvious that my eye coordinates are off.	2016-04-17 17:17:59 -04:00
Thomas Harte	abce0ed3c4	Added setup of the source vertex array.	2016-04-17 16:17:23 -04:00
Thomas Harte	6ff9ffba6c	Switching temporarily to an attempt to draw input runs as if RGB: shader compiles, fixed a race condition on out-of-bounds accesses for the source buffer.	2016-04-17 15:51:28 -04:00
Thomas Harte	104f44f27f	Attempted to improve deinterlacing, gave the CRT full control over blend mode, switched back to 2000000Mhz audio.	2016-04-14 22:20:47 -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	6a17c2992d	Introduced a compile-time configurable audio divider, set it arbitrarily to '8' for now. Discovered why my graphics aren't centred and added a TODO.	2016-04-13 22:31:59 -04:00
Thomas Harte	026ce0255f	Source runs are now captured, and that buffer appropriately reset.	2016-04-13 22:20:13 -04:00
Thomas Harte	2ea02ed127	A source array buffer is also now created, mapped, unmapped, etc.	2016-04-13 22:14:18 -04:00
Thomas Harte	04d1b65c93	Reinstated texture target creation, cut them down to merely RGB.	2016-04-12 22:48:47 -04:00
Thomas Harte	4be8053ba9	Updated documentation.	2016-04-12 22:38:49 -04:00
Thomas Harte	4d889d9c7f	Made an attempt slightly to simplify the fragment processor, at both ends.	2016-04-12 22:35:11 -04:00
Thomas Harte	fe8b0ebc7e	Tidied up a little, mostly bumping things out of just-in-time creation that I can just do well in advance.	2016-04-12 22:31:13 -04:00
Thomas Harte	069ec2e889	In search of the cause of performance issues again, excised the per-pixel sin until it can be further evaluated.	2016-04-11 23:13:54 -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
Thomas Harte	e45fe43801	Removed some dead caveman debugging.	2016-04-10 23:02:34 -04:00
Thomas Harte	bdb99ba92f	Corrections back towards composite output: fixed misnamed constant, ensured the CRT doesn't write nonsense to the output buffer, ensured it grows three vertices at a time rather than six when desired. Net effect should be that the output stage is working again, with the input processing remaining to fill in.	2016-04-10 22:56:52 -04:00
Thomas Harte	8701366277	Switched horizontal sync detection back to differential, switched the Electron to an XOR-style sync output (believed to be accurate, but I need to check), fixed some latent issues around vertical sync detection.	2016-04-10 21:34:40 -04:00
Thomas Harte	fc5530b513	Realising I've managed to confuse input and output, started shift to 'source' for what 'input' was.	2016-04-10 15:58:43 -04:00
Thomas Harte	6dbd20ffde	Expanded interface to rgb_sample to eliminate its need to make assumptions about globals, used expanded interface to compact Electron data to two pixels per byte.	2016-04-05 20:32:55 -04:00
Thomas Harte	c0cd1ed89e	Made an attempt to consolidate timestamp bases to a single vector and hence to lump all geometry into one or two calls, with no repetitive setting of a uniform. I'm not sure the result is correct yet.	2016-04-04 21:57:27 -04:00
Thomas Harte	729fddea1c	Switched to integer textures, likely to simplify for most use cases.	2016-04-04 19:39:01 -04:00
Thomas Harte	3ca58b2a57	Attemted further to diminish jumpiness.	2016-03-22 22:07:30 -04:00
Thomas Harte	8cd5d40e00	Made an attempt to reduce the amount of data heading to the GPU.	2016-03-22 21:16:32 -04:00
Thomas Harte	3038704977	Attempted to introduce a lowpass filter to the graphics output, reverted 6502 optimisations as seemingly not working.	2016-03-21 22:01:25 -04:00
Thomas Harte	197cf2a834	Commented out sync; it can probably be implicit.	2016-03-20 21:42:05 -04:00
Thomas Harte	9da7716c72	Attempted to simplify threading, thereby allowing machines to be constructed within a valid GL context, and started adding appropriate GL syncs. Which all oddly drops everything to a negligible FPS. Investigation will follow.	2016-03-19 22:46:17 -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	5b37a651ac	Made an attemp to deal with glUnmapBuffer(GL_ARRAY_BUFFER) == GL_FALSE.	2016-03-18 21:35:52 -04:00
Thomas Harte	0b1c9fb291	Ensured I don't interrupt triangle strips for the purpose of glDrawArrays.	2016-03-18 21:28:53 -04:00
Thomas Harte	620257e29e	Switched to a client wait, as I try to figure out what's going on.	2016-03-18 21:21:35 -04:00
Thomas Harte	2e4af90e2d	Resolved output errors.	2016-03-18 21:19:11 -04:00
Thomas Harte	10bc33464d	I don't think this is quite correct, but it's better.	2016-03-18 21:14:06 -04:00
Thomas Harte	61e880de03	Keeping a buffer permanently bound is apparently illegal. So back to copying in on demand. Which I think still improves on synchronisation, but not much.	2016-03-18 21:11:09 -04:00
Thomas Harte	c8ecfb89d8	Some cleaning.	2016-03-16 22:52:33 -04:00