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541 Commits

Author SHA1 Message Date
Thomas Harte
79632b1d34 Instituted de-escalating phase-related extensions, definitively to kill rounding error edges. 2017-01-08 16:24:22 -05:00
Thomas Harte
7ad64ff16b Made further efforts to support throughput via memory barrier. 2017-01-08 14:47:16 -05:00
Thomas Harte
be48c950b4 Started taking steps towards using a texture barrier where possible to reduce all of my framebuffer binds. Some output appears, but it's not correct. 2017-01-08 11:13:20 -05:00
Thomas Harte
0487b8c178 Definitively eliminated the additional y filtering step; if I'm going to work to ensure always four samples per colour cycle, I can put the channel separation coefficients directly into their shaders, cutting down on samples. 2017-01-07 16:02:33 -05:00
Thomas Harte
5740015f56 Temporarily disabled composite processing to show the pure stream. Fixed both automatic calculations of phase — per line and, at input, per pixel. 2017-01-07 12:38:00 -05:00
Thomas Harte
c84004bfa3 Fixed: colour_cycle_numerator_ doesn't need to be multiplied by the time multiplier because it'll get that for free from the calculation of next_run_length. 2017-01-06 21:36:19 -05:00
Thomas Harte
c746a3711f Temporarily disabled my attempt to be clever with bilinear filtering when applying a lowpass filter. Will need to investigate. 2017-01-04 08:06:18 -05:00
Thomas Harte
aa7774a9a6 Experimental: up the chroma accuracy, just let the luma go straight through. Subject to figuring out how I'm still losing so much precision. 2017-01-03 22:41:34 -05:00
Thomas Harte
a836120945 Restored proper colour separation, but somewhere a massive hit in horizontal resolution is happening — much greater than one would expect from the sample size picked. So investigation to come. 2017-01-03 22:32:07 -05:00
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
f2b8b26bc4 Started throwing some comments into my shaders. 2017-01-03 21:16:38 -05:00
Thomas Harte
34d213dec4 Decreased Y resolution, again also hopefully temporarily. 2016-12-10 15:35:38 -05:00
Thomas Harte
81a102d951 Upped intermediate buffer size, at least temporarily, while I look for the source of the interference patterns I'm seeing. 2016-12-10 15:20:10 -05:00
Thomas Harte
0e71802b92 Reduced Oric video to single nibble constants. Removed attempt at asynchronous flush as no longer required. 2016-12-10 14:17:46 -05:00
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
33d52bb573 Ensured no over-moving. 2016-12-06 19:02:18 -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
60f9ddfde8 Fixed start test and added incrementation of start locations. 2016-12-06 08:08:57 -05:00
Thomas Harte
f388ba11cc Missed an initialisation. Fixed! 2016-12-06 07:26:23 -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
0220d33562 Resolved failure of initial state setting, which was causing tests sometimes to fail. 2016-12-03 16:42:10 -05:00
Thomas Harte
c5016a3eaa Completed flight of 'Outputs' to postfix underscores. 2016-12-03 11:02:34 -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
bc03e12dc5 Switched to suffix underscores. 2016-11-21 11:57:45 +08:00
Thomas Harte
340607e13e Switched the flywheel to suffix underscores. 2016-11-21 11:48:31 +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
c89345c639 Reduced buffer size. 2016-11-21 11:21:14 +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
ef0367d4a4 Corrected typo. 2016-11-20 09:12:43 +08:00
Thomas Harte
5bc165960a Completed refactoring. 2016-11-20 09:12:06 +08:00
Thomas Harte
fda90c5aef Documented. 2016-11-20 09:11:24 +08:00
Thomas Harte
c2349ee3f4 This thing has clearly becoma a real class. 2016-11-19 20:12:40 +08:00
Thomas Harte
7857ef774f Ensured resets genuinely kill outstanding data. 2016-11-19 20:09:38 +08:00
Thomas Harte
a4c7b00ecd Fixed code that was causing the failing test. 2016-11-19 19:55:30 +08:00
Thomas Harte
f59537bce9 Added a testing hook, but as of yet no tests. 2016-11-17 14:06:16 +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
57f0648742 Fleshed out first implementation of ArrayBuilder, albeit that I need to implement exhaustion properly, as soon as I think of a sensible way to handle synchronisation. 2016-11-17 10:39:30 +08:00
Thomas Harte
324a1de43d Started pulling out array construction as a separate task. 2016-11-17 09:20:49 +08:00
Thomas Harte
c04a116a05 Fixed comment. 2016-11-16 23:14:56 +08:00
Thomas Harte
edeafd4d94 Wait, OpenGL textures go the other way. 2016-11-16 23:14:15 +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
04b2688683 Attempted to reduce allocations. 2016-11-16 13:25:50 +08:00
Thomas Harte
c1a509910d Documented this interface, albeit that the English could do with a second pass, and very sightly simplified inline with current usage. 2016-11-16 13:15:50 +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
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
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
9c550c594a Moved audio work back into its own thread, but this time it queues up an all happens only upon a flush. Hopefully to resolve synchronisation cost concerns. 2016-11-09 21:17:50 -05:00
Thomas Harte
eccfdabeab Temporarily disabled thread hop, until I can find a way to batch these things. 2016-11-03 22:52:02 -04:00
Thomas Harte
4258401384 Implemented flush, added a call to it from the filter speaker's destructor, to ensure no race conditions on accessing the various bits of instance state there and below. 2016-10-19 21:15:04 -04:00
Thomas Harte
c628b7c5c5 This is the real PAL frequency, I think. 2016-10-17 08:05:02 -04:00
Thomas Harte
1f857c619b Fixed timing issues. Static box of frame achieved! 2016-10-12 21:42:36 -04:00
Thomas Harte
00e3ad9b04 Added a bit more ceiling for lowpass filtering on constrained machines. 2016-10-10 07:51:01 -04:00
Thomas Harte
e53455a936 Not having read the C++ synchronisation primitives before, this async task queue is probably incorrect. But nevertheless, let's have a quick go at employing it — in a hideously thread unsafe fashion — for audio generation. What can possibly go wrong? 2016-10-07 16:56:34 -04:00
Thomas Harte
dab3580111 Experimental: can I afford a lower sampling rate if there's a low-pass filter in effect? 2016-08-22 22:18:05 -04:00
Thomas Harte
1541273785 Moved responsibility for throwing in a low-pass filter up to the Vic, appropriately. 2016-08-21 18:13:31 -04:00
Thomas Harte
c783090980 It turns out that the Vic has a 1.6Khz low-pass filter. So added that. 2016-08-21 12:13:41 -04:00
Thomas Harte
fef316932f Moved opening bracket appropriately. 2016-07-04 21:14:28 -04:00
Thomas Harte
8db44eed3e Added a default implementation of Speaker::skip_samples. 2016-07-04 20:48:27 -04:00
Thomas Harte
2bc87ee095 Merge branch 'master' of github.com:TomHarte/CLK 2016-07-01 16:28:18 -04:00
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
ed8f4d0476 Added some minor additional bits of documentation. 2016-06-30 08:46:29 -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
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
fcf4b14344 Extended to allow floating-point sampling rates. Which makes sense. 2016-06-13 19:30:41 -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
1e0fcbbee8 Made a very basic stab at a couple of the tone generators, added straight-through path for the speaker when input rate exactly equals output rate. 2016-06-01 19:53:16 -04:00
Thomas Harte
5c4f35e13f Finally started on generalising the C++ stuff so as to be able to be able to get a working audio binding on the OS-specific side without further repetition by factoring an appropriate protocol out from the Electron and sketching out the correct speaker class for the Atari. Added a method to ask it what a good output frequency would be. 2016-05-31 21:23:44 -04:00
Thomas Harte
4ad074fc78 Introduced a four-cycle delay between playfield fetch and display, curing Yar's Revenge. Also disabled barrel roll scanling colouring again. I really need to make my mind up on that. 2016-05-16 19:55:56 -04:00
Thomas Harte
9d92ad659f Established the basic timing loop, albeit without clocking delays yet. 2016-05-16 08:01:29 -04:00
Thomas Harte
00a2b42080 Made thread-safe. 2016-05-15 15:19:52 -04:00
Thomas Harte
091516e3cb The semantics might need better exposition but: fixed UniformXfv calls plus matrix calls, documented new semantics on all setters. 2016-05-15 14:59:59 -04:00
Thomas Harte
328fabcd10 Ensured values aren't dangling pointers. 2016-05-14 18:15:10 -04:00
Thomas Harte
492dc7ccbf Made an attempt to queue uniform changes until the next call to bind. That's to allow usage from other threads. 2016-05-14 18:06:55 -04:00
Thomas Harte
30f335fa35 Switched pervasively to using the named slot uniform setters on Shader. 2016-05-13 22:08:32 -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
a8ce021136 Fixed comment. 2016-05-10 19:59:03 -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
257420b0f7 Fixed potential output error if buffer top were hit; clarified buffer size constants. 2016-05-10 19:04:03 -04:00
Thomas Harte
309313c470 Update CRTConstants.hpp 
Lack of data duplication means this storage can be smaller.
 2016-05-10 10:49:48 -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
b0f0315f12 Fixed: this now implements 12-byte instancing for output runs. 2016-05-10 07:30:12 -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
59d766b325 Rationalised buffer sizes. 2016-05-09 19:17:03 -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
ad734f341f Attempted fully to perfect memove, albeit that it's not affecting either current machine. 2016-05-09 07:44:05 -04:00
Thomas Harte
8eb058064c Fixed: ensured that the attempt to plot a misplaced write occurs correctly. 2016-05-09 07:42:26 -04:00
Thomas Harte
e6a7161e87 Made some minor corrections on the copyback of misplaced write data. 2016-05-09 07:39:57 -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
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
1f02c5df88 Tidied up some further loose ends. 2016-05-08 20:58:18 -04:00
Thomas Harte
7b5982e455 Removed last mentions of 'lateral'. 2016-05-08 20:51:28 -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
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
501ab74eaf Fixed time multiplier calculation. 2016-04-28 22:12:59 -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
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
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
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
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