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74d0acdaec
Commit Graph

67 Commits

Author SHA1 Message Date
Thomas Harte
74d0acdaec Fixes non-RGB colour composite generation. 
The hard-coded sharpen filter proves to be a really bad fit for the Apple II though.
 2020-09-03 19:04:17 -04:00
Thomas Harte
0288a1974b Tries: separate filters for chroma and luma, plus a post-separation sharpen filter on the latter. 2020-09-03 13:18:21 -04:00
Thomas Harte
6efd8782fe Tweaks coefficients some more; makes sure that data is never larger than the intermediate buffers. 2020-09-02 20:14:41 -04:00
Thomas Harte
8bab9d5d60 Corrects S-Video and composite generation for RGB[1/2/4] sources. 
Also toys with a double luminance filter in order to try to sharpen chrominance. But maybe I should be looking at other convolutions entirely?
 2020-09-02 19:13:54 -04:00
Thomas Harte
7e58648743 Corrects front-running bug, plays further with colour amplitude. 2020-09-02 15:51:48 -04:00
Thomas Harte
0f0c3e616d Tweaks some numbers. 
I'm largely treading water here. Probably time to think about the race.
 2020-09-02 08:17:01 -04:00
Thomas Harte
c7ce65ea4c Attempts fully to restore composite video. 
Subject to some sort of nasty race condition for the time being.
 2020-09-02 08:03:10 -04:00
Thomas Harte
c36247b609 Ensures reuse of offset buffers. 
There seems to be some sort of epic race condition as the drawing pipeline lags though. Will need to investigate.
 2020-09-01 22:11:48 -04:00
Thomas Harte
15296e43a4 Attempts correctly to set up the CPU side of a composite video pipeline, at least. 
So: I think this is really close, but I'm out of time for the day.
 2020-09-01 21:58:33 -04:00
Thomas Harte
f2929230a2 [Experimentally] introduces blending between computed S-Video fragments. 2020-09-01 21:37:36 -04:00
Thomas Harte
bf252b8061 Fixes sizing of buffers to the current output. 2020-09-01 21:33:54 -04:00
Thomas Harte
9e2bf2af7e Restricts S-Video processing to updated lines. 2020-09-01 21:27:40 -04:00
Thomas Harte
245f2654f0 Shifts S-Video processing into the compute shader. 2020-09-01 20:37:11 -04:00
Thomas Harte
67ca298a72 Forces a no-op compute shader into the S-Video pipeline. 
The intention is to restrict the area acted over, and to do the S-Video filtering in there. Then I'll just need two such stages for composite.
 2020-09-01 18:39:52 -04:00
Thomas Harte
67d4dbf91a Starts girding for a third pipeline. 2020-08-31 20:01:59 -04:00
Thomas Harte
b344269140 I think I accept the need for intermediate steps now. 
This allocates storage.
 2020-08-30 20:21:01 -04:00
Thomas Harte
bb547610f2 Adds commentary, shrinks some intermediate texture sizes. 2020-08-30 12:06:29 -04:00
Thomas Harte
1e1f007bb7 Possibly convinces myself that no-separation chroma/luma isn't practical. 
... as appealing as it may be, were filters perfect.
 2020-08-29 21:25:49 -04:00
Thomas Harte
c40d858f02 Switches back to angular stuff at input resolution; ensures all S-Video modes work. 
Now to roll back onto composite. Fingers crossed!
 2020-08-29 20:54:46 -04:00
Thomas Harte
3d564d85fd Proves that per-pixel sine/cos evaluation avoids phase issues. 
Even in PAL mode. But I'd rather not _require_ this as it kind of negates directly-sampled input.
 2020-08-29 18:53:37 -04:00
Thomas Harte
02cea40ffa Attempts to avoid introducing phase error in scanToComposition. 
Also brightens S-Video up to RGB levels.
 2020-08-25 22:41:37 -04:00
Thomas Harte
e502d336db Having decided that these things probably need to be separate, starts drilling down on S-Video. 2020-08-25 22:05:19 -04:00
Thomas Harte
807cb99f6d Composite angles are signed. 2020-08-23 21:39:04 -04:00
Thomas Harte
7ca0362f23 Treads water. 
Difficult current question: why does the Atari 2600's display change colours as the display tries to achieve horizontal lock? Phase should be unchanged. Ergo something is amiss.
 2020-08-23 21:03:26 -04:00
Thomas Harte
56c7bd242a Marginally tidies. 2020-08-22 16:38:36 -04:00
Thomas Harte
5c6112415a Sets appropriate clear colour for composition render pass. 2020-08-21 22:41:54 -04:00
Thomas Harte
bf6a0c9fc4 Achieves a return of composite colour for RGB-producing machines. 2020-08-21 22:06:36 -04:00
Thomas Harte
d54b937ab6 Starts trying to do actual composite processing. 2020-08-21 21:11:25 -04:00
Thomas Harte
7c23c32e44 Corrects composition colour phase. 2020-08-20 20:45:45 -04:00
Thomas Harte
4e21d24b5f Corrects composition colour amplitude. 2020-08-20 20:34:37 -04:00
Thomas Harte
ad6fb85fda Corrects use of composition buffer. 
Something is still very obviously amiss in colour processing somewhere down the line, but the correct forms are once again visibly in evidence.
 2020-08-20 20:21:28 -04:00
Thomas Harte
5dc39a5d24 Adds the composition render pass. 
Albeit that something here doesn't work at present.
 2020-08-19 21:56:53 -04:00
Thomas Harte
3597f687de Continues sidling towards composite & S-Video handling. 2020-08-19 21:20:06 -04:00
Thomas Harte
8811506adf Starts towards building a compound[/composition?] buffer. 
I now need to discover whether I can use natural integer texture coordinates.
 2020-08-17 22:10:02 -04:00
Thomas Harte
11dec6fc0f Avoids a redundant clear. 2020-08-17 22:09:15 -04:00
Thomas Harte
59c4c8233f Generalises existing scanToDisplay to add lineToDisplay. 2020-08-17 21:15:19 -04:00
Thomas Harte
9da79d2d81 Clarifies scaling logic. 2020-08-17 20:29:46 -04:00
Thomas Harte
27e8a3a1b5 Obeys modals' zoom. 
Subject to an attempt at factoring aspect ratio differences.
 2020-08-16 21:11:43 -04:00
Thomas Harte
745797b596 Introduces a stencil buffer plus the inter-frame clearing it allows. 2020-08-16 16:42:32 -04:00
Thomas Harte
940e9e037e Adds first_scan to LineMetadata. 
Also reorders `Line` fields to match `Scan` fields, just for visual consistency.
 2020-08-16 08:59:37 -04:00
Thomas Harte
512c0079a9 Makes thread safe. 2020-08-15 21:52:55 -04:00
Thomas Harte
645c29f853 Adds an intermediate buffer to correct inter-frame smoothing. 
Also goes someway back to the old scan output scheduling, albeit presently with limited thread safety.
 2020-08-15 21:24:10 -04:00
Thomas Harte
7ac88536dd Respects machine aspect ratio. 
To an extent. Doesn't currently deal with cropping of machines when the window aspect ratio is smaller.
 2020-08-14 21:24:25 -04:00
Thomas Harte
230b9fc9e6 Permits multiple simultaneous scan reading ranges. 
Also updates the OpenGL scan target as per the latest movements of things.
 2020-08-12 22:08:41 -04:00
Thomas Harte
27ca782cac Enables blending; attempts to enable frame preservation. 
The latter seems to be evidencing a double buffer at play. More investigation required.

On the plus side, the direct route is still well within GPU budget at 4k on my Core M. So a huge improvement there.
 2020-08-12 19:34:07 -04:00
Thomas Harte
a136a00a2f Takes a shot at adding RGB -> S-Video and composite conversion, for all RGB types. 2020-08-11 22:11:50 -04:00
Thomas Harte
4b55df1cb4 Starts upon a macro-oriented means of RGB input function generation. 2020-08-10 22:03:39 -04:00
Thomas Harte
8374a5e579 Adds superficially correct compositeSampleLuminance8Phase8 function. 
Thereby uncovering a minor error in my decoding of colour phase.
 2020-08-10 21:33:59 -04:00
Thomas Harte
525233e10b Ensures all input data types are parseable in Metal. 
Though now I need to think a bit more about the best way to compose signal-type conversions, and whether output-type calculations (i.e. gamma, brightness) are applied.
 2020-08-10 19:47:47 -04:00
Thomas Harte
28d933d5d6 Does just enough to get 8-bit RGB and 1-bit luminance machines to display. 
Assuming an 'RGB' output.
 2020-08-09 21:19:07 -04:00