64 Commits

Author	SHA1	Message	Date
Thomas Harte	ad9df4bb90	Commutes uint8_t *, uint16_t *, uint32_t *, size_t, off_t and long to functional-style casts.	2017-10-21 22:30:15 -04:00
Thomas Harte	5e3e91373a	Switches all unsigned int and double casts to functional style.	2017-10-21 19:49:04 -04:00
Thomas Harte	2d81acb82e	Upped C++ standard to C++14 and added an #if that's intended to use the built-in std::gcd when compiled on C++17 or better. Fixed for new signedness warnings resulting for taking the step to C++14.	2017-08-11 19:18:45 -04:00
Thomas Harte	ad8c8166bc	Built in gamma conversion for all machines, assuming an output of 2.8 for PAL, 2.2 for NTSC.	2017-08-10 15:17:08 -04:00
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