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Author	SHA1	Message	Date
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	eeb646868b	Switched off filtering, at least temporarily, to try to ensure that sampling is all where it should be.	2017-01-08 19:53:08 -05:00
Thomas Harte	3d789732a2	Switched back to full buffer clearing. Until I can figure out the source of noise.	2017-01-08 19:50:31 -05:00
Thomas Harte	d2a7d39749	Ensured the output lock isn't held while talking to the delegate.	2017-01-08 19:49:21 -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	cf6d03e35c	Merge branch 'master' into PhaseAlignedSampling	2017-01-08 14:49:40 -05:00
Thomas Harte	4a4b31a15c	Merge pull request #94 from TomHarte/ElectronDisks ... Fixes the Electron's ability automatically to launch a disk	2017-01-08 14:48:58 -05:00
Thomas Harte	f3d9aec8fc	Fixed Electron's support for automatically booting floppy disks.	2017-01-08 14:47:41 -05:00
Thomas Harte	7ad64ff16b	Made further efforts to support throughput via memory barrier.	2017-01-08 14:47:16 -05:00
Thomas Harte	6153ada33b	Fixed Electron's support for automatically booting floppy disks.	2017-01-08 14:46:19 -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	9d60172571	Merge pull request #93 from TomHarte/ReadWriteTrack ... Implements the Type 3 WD177x commands	2017-01-01 21:01:56 -05:00
Thomas Harte	eca3995481	Added a CRC check for read address, ensured CRC, lost data and record not found are initially reset.	2017-01-01 21:00:25 -05:00
Thomas Harte	044c920a5b	Made it more explicit that there are no unhandled cases.	2017-01-01 20:56:52 -05:00
Thomas Harte	0df9ce5a76	Made an attempt at read address. So superficially that leaves only the force interrupts.	2017-01-01 20:55:09 -05:00
Thomas Harte	f94f34f053	Made an attempt at read track. Which means process_input_bit can't just swallow syncs any more; it now reports them as tokens of type ::Sync.	2017-01-01 20:39:19 -05:00
Thomas Harte	4ad2d2bedd	Merge branch 'master' into ReadWriteTrack	2017-01-01 20:04:22 -05:00
Thomas Harte	e28f72d919	Merge pull request #90 from TomHarte/TravisCI ... Introduces a shared Xcode scheme plus a first attempt at Travis CI integration	2017-01-01 20:03:26 -05:00
Thomas Harte	c994fa39f6	Ensured spin-up doesn't occur if there's no motor line.	2016-12-31 16:18:30 -05:00
Thomas Harte	1ea4f0d79d	Made an attempt to implement 'write track' and ensure that 'write sector' can't end without announcing that it has ended writing.	2016-12-31 16:01:44 -05:00
Thomas Harte	0689df1349	Merge pull request #92 from TomHarte/MFMCleanup ... Adds some documentation and tidies some of the new MFM infrastructure	2016-12-31 15:32:11 -05:00
Thomas Harte	b3c33d993a	Made an attempt to explain the requirements placed upon Disk subclasses that wish to support writing.	2016-12-31 15:30:48 -05:00
Thomas Harte	8eb21c6702	The "MFM...Byte"s aren't MFM-specific, they're relevant to both FM and MFM encoding. So renamed them. Also slimmed syntax within MFM.cpp mostly where emigration from the Acorn disk analyser had left a residue of lengthy namespace specification.	2016-12-31 15:25:11 -05:00
Thomas Harte	4c62487e6e	Merge pull request #91 from TomHarte/TableCRC ... Switches to a table-based implementation of CRC generation	2016-12-31 14:16:17 -05:00
Thomas Harte	a147d56ce6	Switched to a table-based implementation of CRC generation, adding construction cost to cheapen running cost.	2016-12-31 14:15:20 -05:00
Thomas Harte	7b696b0962	Switched scheme to shared.	2016-12-31 13:11:07 -05:00
Thomas Harte	57bb771fb7	It looks like spaces are automatically escaped (?)	2016-12-31 13:05:55 -05:00
Thomas Harte	5201a59c44	Attempted to introduce Travis CI.	2016-12-31 13:03:32 -05:00
Thomas Harte	df6e98fa52	Merge pull request #89 from TomHarte/OricDiskWrites ... Adds write support for the Oric .DSK file format	2016-12-31 12:53:43 -05:00
Thomas Harte	52b850a3f5	Quick extra: make sure parsed tracks don't overflow the 6400 byte space available in an MFM disk. Which might be better expressed as 6250?	2016-12-31 12:51:52 -05:00
Thomas Harte	cfbab1448c	Switched to a track parsing that disallows synchronisation values within sector contents.	2016-12-31 12:23:08 -05:00
Thomas Harte	12549ff412	Might as well get the file offset before entering the critical section; also moved the lock guard down more explicitly to group with the second set of actions.	2016-12-31 11:48:46 -05:00
Thomas Harte	6f0b5427e4	Made an attempt to avoid repetition of sync bytes.	2016-12-31 00:20:00 -05:00
Thomas Harte	0123b37213	Made an attempt to include sync values in the stream and properly to align.	2016-12-31 00:11:31 -05:00
Thomas Harte	ea4d85e1cd	The virtual disk constructed is the same across all tracks. So why not just request zero?	2016-12-31 00:10:35 -05:00
Thomas Harte	f217d508b8	Completed first attempt at write support for Oric disk images.	2016-12-30 23:12:46 -05:00
Thomas Harte	1f625fad66	Decided that if this is an [M]FM parsing function then it should be something more intelligent than a mere PLL record. Which I guess conveniently implies Oric DSK-esque behaviour. But properly defined, rather than very vaguely.	2016-12-30 23:10:52 -05:00
Thomas Harte	632b3c63b1	Added the infrastructure necessary for Oric disks to appear writeable to the machine and to receive changed tracks.	2016-12-30 22:51:48 -05:00