Thomas Harte
|
ef03c84b21
|
More definitively removed the old sample-offset blending approach to filtering.
|
2017-07-21 20:58:55 -04:00 |
|
Thomas Harte
|
344d267fd2
|
Introduced sharper chrominance for genuinely black-and-white signals.
|
2017-07-06 21:38:33 -04:00 |
|
Thomas Harte
|
4211389ac7
|
Connected machine-supplied colour burst amplitude to shader, discarding hard-coded value. Net effect: the colour component is now discarded for the ZX80 and 81.
|
2017-07-06 21:29:08 -04:00 |
|
Thomas Harte
|
c6d00ec7d1
|
Switched phase and amplitude varying to a 3d vector; the third component is 1/amplitude if amplitude is non-zero, and zero otherwise. So you can multiply by that to get chrominance, rather than dividing by amplitude. With the direct effect that detected chrominance should automatically be zero if the colour burst didn't exist (i.e. had zero amplitude).
|
2017-07-06 21:25:38 -04:00 |
|
Thomas Harte
|
c2b5a9bb1f
|
Minor fix: given that phase is now a function of position, stop nudging position.
|
2017-05-13 21:50:48 -04:00 |
|
Thomas Harte
|
e01f3f06c8
|
Completed curly bracket movement.
|
2017-03-26 14:34:47 -04:00 |
|
Thomas Harte
|
6cb95b4fc5
|
Switched to passing around std::strings rather than char *s, because they should be easier to capture.
|
2017-02-20 10:35:33 -05:00 |
|
Thomas Harte
|
fccdce65b9
|
Switched to lock guards.
|
2017-02-19 21:45:28 -05:00 |
|
Thomas Harte
|
b4159295f6
|
Switched to using quads for intermediate draws. The specific concern is the flexibility offered in the GL spec as to line drawing algorithms. And even if a driver implements exactly to spec then it should omit the final pixel.
|
2017-01-11 21:18:41 -05:00 |
|
Thomas Harte
|
d0a93409e6
|
Made an attempt to simplify in-shader phase calculation, now that output position is a direct multiple of phase.
|
2017-01-11 08:18:00 -05:00 |
|
Thomas Harte
|
4c3669f210
|
Reduced precision of input phase, but I'm not necessarily persuaded by it as a move. However it's clear that something is off in that whole area. But if phase is locked by output position, do I need to retain this level of complexity? Also ensured that intermediate buffers prior to the final are sampled using the nearest sampling mode, also to reduce precision errors.
|
2017-01-10 22:08:07 -05:00 |
|
Thomas Harte
|
9521718120
|
Colour phase is multiplied by 255, not 256.
|
2017-01-08 17:21:26 -05:00 |
|
Thomas Harte
|
28909e33ca
|
Eliminated phaseCyclesPerTick as implied.
|
2017-01-08 16:48:02 -05:00 |
|
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
|
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
|
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
|
bc03e12dc5
|
Switched to suffix underscores.
|
2016-11-21 11:57:45 +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
|
2bd71e7e9b
|
.reset is the more normal way to reassign a unique_ptr.
|
2016-06-23 20:52:44 -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
|
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
|
47ae402f7e
|
Introduced a shorthand for setting up array attributes.
|
2016-05-10 19:11:48 -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
|
7b5982e455
|
Removed last mentions of 'lateral'.
|
2016-05-08 20:51:28 -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
|
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
|
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
|
c93bcf9f28
|
Discovered cause of clears: stale code. Tweaked persistence, again.
|
2016-05-01 22:28:33 -04:00 |
|
Thomas Harte
|
6982e945fb
|
Fixed those issues breaking GL state, I hope.
|
2016-05-01 16:17:52 -04:00 |
|
Thomas Harte
|
2616d748fe
|
Introduced bind-if-necessary/unbind semantics for shaders.
|
2016-05-01 11:07:49 -04:00 |
|