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325 Commits

Author SHA1 Message Date
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
a75259ce9f Removed some dead caveman debugging statements. 2016-05-08 16:18:42 -04:00
Thomas Harte
9b2061be98 Actually, that should probably be 1/outputTextureSize, as the output range is -1 to +1. 2016-05-08 16:09:39 -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
e9a9cfb09f Fixed off-by-one error on texture upload. 2016-05-05 07:22:49 -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
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
3684c6404f Proven through deliberate inefficiency: the issues are (i) texture upload; and (ii) buffer wraparound. 2016-05-03 22:22:12 -04:00
Thomas Harte
759fbd89ca Switched pixel unpack buffer back to explicit flushes. 2016-05-03 21:26:09 -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
535d272039 Tweaks here, tweaks there. 2016-05-03 18:15:24 -04:00
Thomas Harte
6d5a1b33ee Turned the colour up just a little, slightly lowered luminance signal strength. 2016-05-03 07:51:14 -04:00
Thomas Harte
31f1e6d5c0 Introduced a separate stage for luminance filtering. 2016-05-03 07:46:40 -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
4a0e1dc789 Switched to explicit flushing of data. 2016-05-01 22:33:00 -04:00
Thomas Harte
c93bcf9f28 Discovered cause of clears: stale code. Tweaked persistence, again. 2016-05-01 22:28:33 -04:00
Thomas Harte
09ed8eb654 Quelle surprise, failure to find strikes again. Fixed. 2016-05-01 21:07:27 -04:00
Thomas Harte
1b6754c5f8 Shuffled code, realised I wasn't actually binding my shader. 2016-05-01 19:22:24 -04:00
Thomas Harte
69984b54e5 Fixed aspect ratio storage. Adjusted indentation slightly. 2016-05-01 16:49:44 -04:00
Thomas Harte
6982e945fb Fixed those issues breaking GL state, I hope. 2016-05-01 16:17:52 -04:00
Thomas Harte
4ec4cceb84 Made a first attempt at adding draw-as-a-quad functionality to texture targets. 2016-05-01 13:52:35 -04:00
Thomas Harte
2616d748fe Introduced bind-if-necessary/unbind semantics for shaders. 2016-05-01 11:07:49 -04:00
Thomas Harte
fe2abbd4ed Minor adjustments to ensure sampling occurs as intended. 2016-04-30 20:48:09 -04:00
Thomas Harte
16ef09fc2b Made an attempt intelligently to use bilinear filtering to increase filtering quality with the same number of samples. 2016-04-29 18:37:35 -04:00
Thomas Harte
23ea832f41 Increased brightness in television mode, added a clear if screen resolution changes. 2016-04-28 22:04:47 -04:00
Thomas Harte
3638414b37 Added additional comments. 2016-04-28 21:55:14 -04:00
Thomas Harte
e6c3b148ac Switched wholeheartedly to the new shader. 2016-04-28 21:45:44 -04:00
Thomas Harte
8538b62ea2 Made an attempt to extract and consolidate the logic behind the intermediate shaders. 2016-04-28 21:04:59 -04:00
Thomas Harte
87c778ebb7 Fixed code use of parameter name. 2016-04-27 22:58:53 -04:00
Thomas Harte
494ef6a324 Updated documentation, taking the opportunity to improve a parameter name. 2016-04-27 22:57:40 -04:00
Thomas Harte
7c20fce467 I guess NumberOfFields is done for. 2016-04-27 22:48:37 -04:00
Thomas Harte
8849dc3265 Finished consolidation into OutputShader. With its documentation yet to update. 2016-04-27 22:41:32 -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
f6d58f1ce7 Played in the margins with image retention. 2016-04-26 22:14:12 -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
9b64f64db7 Attempted to normalise some style decisions.` 2016-04-24 22:32:24 -04:00
Thomas Harte
884755c560 Ensured the GL context is available when switching Atari 2600 output, and that it locks the output. 2016-04-24 20:56:21 -04:00
Thomas Harte
2bd6566768 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. 2016-04-24 20:47:24 -04:00
Thomas Harte
d221c712b0 Ensured GL context is active when destructing CRTOpenGL. 2016-04-24 20:34:25 -04:00
Thomas Harte
acab22d95a Removed any improper talk of YUV. Switched to (cos, -sin) formulation of the quadrature vector, which I now believe to be correct. 2016-04-24 20:27:03 -04:00
Thomas Harte
d393776677 Fixed an incorrect sign. 2016-04-24 19:29:30 -04:00
Thomas Harte
9b2b7a09eb Ensured that colour space changes take effect. 2016-04-24 19:16:23 -04:00
Thomas Harte
929cfc49cb Extended window for picking output frequency, attempted to consolidate CRT OpenGL timing uniforms for approprate resetting. 2016-04-24 18:58:31 -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
d0f9a6c2f5 Added a dump-the-input default RGB output shader. Which at least proves that the Atari 2600 is generally still working. 2016-04-24 17:35:25 -04:00
Thomas Harte
775fc270e6 Fixed bug whereby first frame drawn has random collection of data. 2016-04-24 07:00:22 -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
bdaf4cee43 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. 2016-04-24 06:16:41 -04:00
Thomas Harte
c123f3bf74 Fixed run extension, temporarily forced colour amplitude. 2016-04-23 14:16:49 -04:00
Thomas Harte
a4889074b8 Moved final colour space conversion out of the innermost loop. 2016-04-22 21:29:27 -04:00
Thomas Harte
8ff1f82008 Fixed accidental channel duplication. 2016-04-22 19:18:28 -04:00
Thomas Harte
95639f1189 Made attempt to introduce final filtering stage and output. 2016-04-22 19:15:59 -04:00
Thomas Harte
23311d633b Doubled phosphor life, added comment on required final stage fix for tomorrow. 2016-04-21 23:15:48 -04:00
Thomas Harte
59c07f7ddd This, at least, is an attempt to decode chrominance, as yet unfiltered, and not commuted to RGB (and possibly packed incorrectly). 2016-04-21 23:01:54 -04:00
Thomas Harte
cc7bf97a9c This now attempts to filter y. 2016-04-21 22:32:30 -04:00
Thomas Harte
e7ed1224a5 Introduced the second filtering stage, albeit that it presently does nothing whatsoever. 2016-04-21 21:32:36 -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
638b08302b The initial composite buffer is now genuinely a composite signal. 2016-04-21 19:37:32 -04:00
Thomas Harte
d9a9dffe63 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. 2016-04-20 21:05:32 -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
e2da77fb8b Clarified constants, ensured monitor mode works from startup. 2016-04-19 22:53:39 -04:00
Thomas Harte
ef83595af3 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). 2016-04-19 22:38:11 -04:00
Thomas Harte
3d7a3ce995 Eliminated some redundant texture binds. 2016-04-19 22:30:05 -04:00
Thomas Harte
145c0b3b71 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. 2016-04-19 22:21:26 -04:00
Thomas Harte
66f2c10c04 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. 2016-04-19 21:00:48 -04:00
Thomas Harte
88e237b8de Standardised indentation and added one extra piece of documentation. 2016-04-19 20:53:55 -04:00
Thomas Harte
20aa9e291d Attempted to deal with the precision issues causing 'television' output currently to differ from 'monitor' output. Documented TextureTarget while I'm here. 2016-04-19 20:51:34 -04:00
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
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
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
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
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
Thomas Harte
0d27d3bb7f As messy as it is, this use glMapBufferRange to avoid explicit buffer submits. 2016-03-16 22:29:22 -04:00
Thomas Harte
68da673a95 Wrapped this up as explicitly only the Mac thing to do. 2016-03-08 22:53:29 -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