Thomas Harte
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496d979aca
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Made a decision to clean up by creating per-shader classes. Well, more or less. First thing to be factored out: the output shader.
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2016-04-27 22:29:54 -04:00 |
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Thomas Harte
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f6d58f1ce7
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Played in the margins with image retention.
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2016-04-26 22:14:12 -04:00 |
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Thomas Harte
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416c944f02
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Experimental: let's try accumulating history directly in the framebuffer.
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2016-04-26 21:41:39 -04:00 |
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Thomas Harte
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6c567d166a
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Fixed colour burst acceptance, switched to an integral single byte streaming of Atari colours.
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2016-04-25 20:56:15 -04:00 |
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Thomas Harte
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9b64f64db7
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Attempted to normalise some style decisions.`
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2016-04-24 22:32:24 -04:00 |
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Thomas Harte
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884755c560
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Ensured the GL context is available when switching Atari 2600 output, and that it locks the output.
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2016-04-24 20:56:21 -04:00 |
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Thomas Harte
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2bd6566768
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Oh, of course, I can use GL_CONSTANT_ALPHA so that new colours can be painted at alpha 1.0 while possibly saturating with old colours.
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2016-04-24 20:47:24 -04:00 |
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Thomas Harte
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d221c712b0
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Ensured GL context is active when destructing CRTOpenGL.
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2016-04-24 20:34:25 -04:00 |
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Thomas Harte
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acab22d95a
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Removed any improper talk of YUV. Switched to (cos, -sin) formulation of the quadrature vector, which I now believe to be correct.
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2016-04-24 20:27:03 -04:00 |
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Thomas Harte
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d393776677
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Fixed an incorrect sign.
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2016-04-24 19:29:30 -04:00 |
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Thomas Harte
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9b2b7a09eb
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Ensured that colour space changes take effect.
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2016-04-24 19:16:23 -04:00 |
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Thomas Harte
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929cfc49cb
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Extended window for picking output frequency, attempted to consolidate CRT OpenGL timing uniforms for approprate resetting.
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2016-04-24 18:58:31 -04:00 |
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Thomas Harte
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082003ed0a
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Reintroduced the CRT delegate and the 2600's automatic region switching. Albeit that the CRT itself doesn't adjust properly to new timings yet.
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2016-04-24 18:36:22 -04:00 |
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Thomas Harte
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d0f9a6c2f5
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Added a dump-the-input default RGB output shader. Which at least proves that the Atari 2600 is generally still working.
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2016-04-24 17:35:25 -04:00 |
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Thomas Harte
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775fc270e6
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Fixed bug whereby first frame drawn has random collection of data.
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2016-04-24 07:00:22 -04:00 |
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Thomas Harte
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80a3169674
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Started reviving the Atari 2600 emulation. Put new startup sequence into place.
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2016-04-24 06:56:08 -04:00 |
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Thomas Harte
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bdaf4cee43
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Switched to an in-framebuffer approach to phosphor decay, which might be acceptable now that every single pixel is being painted, re-emphasises luminance and stretched sampling period for the two FIR filters as well as decreasing the amount of signal that is retained, subjectively to improve output.
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2016-04-24 06:16:41 -04:00 |
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Thomas Harte
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c123f3bf74
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Fixed run extension, temporarily forced colour amplitude.
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2016-04-23 14:16:49 -04:00 |
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Thomas Harte
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a4889074b8
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Moved final colour space conversion out of the innermost loop.
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2016-04-22 21:29:27 -04:00 |
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Thomas Harte
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8ff1f82008
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Fixed accidental channel duplication.
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2016-04-22 19:18:28 -04:00 |
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Thomas Harte
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95639f1189
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Made attempt to introduce final filtering stage and output.
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2016-04-22 19:15:59 -04:00 |
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Thomas Harte
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23311d633b
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Doubled phosphor life, added comment on required final stage fix for tomorrow.
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2016-04-21 23:15:48 -04:00 |
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Thomas Harte
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59c07f7ddd
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This, at least, is an attempt to decode chrominance, as yet unfiltered, and not commuted to RGB (and possibly packed incorrectly).
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2016-04-21 23:01:54 -04:00 |
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Thomas Harte
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cc7bf97a9c
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This now attempts to filter y.
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2016-04-21 22:32:30 -04:00 |
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Thomas Harte
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e7ed1224a5
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Introduced the second filtering stage, albeit that it presently does nothing whatsoever.
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2016-04-21 21:32:36 -04:00 |
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Thomas Harte
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23ce032ba1
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Started edging towards the necessary flexibility for the other two intermediate shaders.
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2016-04-21 20:21:34 -04:00 |
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Thomas Harte
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4b9985626d
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Started commuting alpha to direction. The incoming amplitude is now honoured.
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2016-04-21 19:53:41 -04:00 |
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Thomas Harte
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638b08302b
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The initial composite buffer is now genuinely a composite signal.
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2016-04-21 19:37:32 -04:00 |
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Thomas Harte
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d9a9dffe63
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Factored out wraparound buffer addressing where it's otherwise going to get really repetitive; need to look at using the same approach for the glTexSubImage2D step at least but that probably means properly encapsulating the buffer builder's state.
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2016-04-20 21:05:32 -04:00 |
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Thomas Harte
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8232ed765e
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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.
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2016-04-20 20:44:25 -04:00 |
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Thomas Harte
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e2da77fb8b
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Clarified constants, ensured monitor mode works from startup.
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2016-04-19 22:53:39 -04:00 |
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Thomas Harte
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ef83595af3
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Fixed: issue was (i) always thinking the entire source run buffer needed to be issued; and (ii) having fixed that, always thinking that the block that needs redrawing doesn't overflow the buffer. Fixed both. 'Television' mode is now working without explicit synchronisation (and with a lot less work).
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2016-04-19 22:38:11 -04:00 |
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Thomas Harte
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3d7a3ce995
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Eliminated some redundant texture binds.
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2016-04-19 22:30:05 -04:00 |
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Thomas Harte
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145c0b3b71
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Smoothed output device changes, killing some dead state. Added an explicit glFinish to suggest that the problem is synchronisation rather than any sort of data or shader error.
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2016-04-19 22:21:26 -04:00 |
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Thomas Harte
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66f2c10c04
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Resolved potential crash if tape requests are made without one inserted. Softened glFinish to glFlush, though I'm still not sure I should strictly need even that.
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2016-04-19 21:00:48 -04:00 |
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Thomas Harte
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88e237b8de
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Standardised indentation and added one extra piece of documentation.
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2016-04-19 20:53:55 -04:00 |
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Thomas Harte
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20aa9e291d
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Attempted to deal with the precision issues causing 'television' output currently to differ from 'monitor' output. Documented TextureTarget while I'm here.
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2016-04-19 20:51:34 -04:00 |
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Thomas Harte
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6f52ed14d6
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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.
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2016-04-19 19:32:52 -04:00 |
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Thomas Harte
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b90a487a16
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Attempted to enable both monitor and television output paths in the same codebase. The television route seems to be broken. Investigation required.
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2016-04-19 19:30:50 -04:00 |
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Thomas Harte
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6c9bcfa637
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Got rigorous on exceptions, started working towards having a working 'composite' shader at the same time as having a working RGB shader.
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2016-04-19 08:05:43 -04:00 |
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Thomas Harte
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bcc784bda9
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Introduced an interface for specifying attribute bindings, taking the opportunity to document the interface and introduce exceptions.
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2016-04-19 07:23:15 -04:00 |
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Thomas Harte
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9d39c14752
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Nothing of substance different; main current mystery: why do old frames recur and why does other jumpiness occur? Do I need some explicit synchronistion?
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2016-04-18 22:18:03 -04:00 |
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Thomas Harte
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cf55a0c423
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Fixed: composite output y is now incremented upon the start of retrace, that causing it to have different values at either edge of scans.
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2016-04-18 21:49:45 -04:00 |
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Thomas Harte
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9580dde3ad
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Fixed left/right shuffling. Was simply failing to supply the integer version of coordinates.
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2016-04-18 21:40:23 -04:00 |
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Thomas Harte
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d5bac2f04f
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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.
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2016-04-18 21:32:48 -04:00 |
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Thomas Harte
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bf29c8e2bf
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Fixed mismatch in television/monitor selection, ticked view for drawing concurrently, since it can, removed stray space.
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2016-04-18 19:01:15 -04:00 |
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Thomas Harte
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5980f5e991
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Number of taps can be specified explicitly if you desire.
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2016-04-17 20:45:57 -04:00 |
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Thomas Harte
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499f7ace07
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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.
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2016-04-17 20:43:20 -04:00 |
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Thomas Harte
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9ede284eb6
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Added blanking source runs, ensuring the rolling buffer is appropriately cleared.
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2016-04-17 20:34:52 -04:00 |
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Thomas Harte
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43cae267f9
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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.
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2016-04-17 18:08:05 -04:00 |
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