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* dither 256-level greyscale to 8-level greyscaleKartik K. Agaram2021-07-112-2/+212
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* .Kartik K. Agaram2021-07-101-24/+24
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* .Kartik K. Agaram2021-07-101-3/+3
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* .Kartik K. Agaram2021-07-104-23/+3
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* .Kartik K. Agaram2021-07-101-88/+47
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* increase precision for dithering computationsKartik K. Agaram2021-07-101-3/+8
| | | | Now we get a perfect checkerboard pattern.
* .Kartik K. Agaram2021-07-102-34/+106
| | | | https://merveilles.town/@akkartik/106559551043772522
* .Kartik K. Agaram2021-07-101-4/+4
| | | | https://merveilles.town/@akkartik/106557664535993377
* dithering greyscale using black/whiteKartik K. Agaram2021-07-105-24/+293
| | | | Starting to look right.
* reorder a few functionsKartik K. Agaram2021-07-081-126/+128
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* .Kartik K. Agaram2021-07-081-0/+12
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* scaling ppm imagesKartik K. Agaram2021-07-081-26/+76
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* scaling pgm imagesKartik K. Agaram2021-07-081-21/+65
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* .Kartik K. Agaram2021-07-081-3/+2
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* .Kartik K. Agaram2021-07-081-3/+3
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* .Kartik K. Agaram2021-07-081-4/+4
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* .Kartik K. Agaram2021-07-081-1/+1
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* scaling pbm imagesKartik K. Agaram2021-07-081-30/+67
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* .Kartik K. Agaram2021-07-081-18/+18
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* better ppm colorsKartik K. Agaram2021-07-081-7/+31
| | | | I had some logic to make hue distance cylindrical, but it wasn't right.
* better greyscaleKartik K. Agaram2021-07-081-2/+8
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* .Kartik K. Agaram2021-07-081-14/+14
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* .Kartik K. Agaram2021-07-081-1/+0
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* ppm colors are weird, thoughKartik K. Agaram2021-07-084-1/+16404
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* ppm supportKartik K. Agaram2021-07-071-3/+32
| | | | Typo in commit fe3cbcd77: it only rendered pbm/pgm.
* instructions for Universal CtagsKartik K. Agaram2021-07-072-3/+4
| | | | Thanks Sumeet Agarwal for raising this issue.
* .Kartik K. Agaram2021-07-071-9/+9
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* render ppm/pgmKartik K. Agaram2021-07-071-7/+106
| | | | Looks pretty bad compressing 256 shades of grey to 8.
* load ppm/pgm/ppm on demandKartik K. Agaram2021-07-071-8/+113
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* initial image renderingKartik K. Agaram2021-07-075-0/+6163
| | | | | | Supports just some ASCII formats: https://en.wikipedia.org/wiki/Netpbm Colors are messed up. That's next.
* .Kartik K. Agaram2021-07-061-8/+18
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* .Kartik K. Agaram2021-07-062-44/+44
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* nearest h/s/l color by a euclidean metricKartik K. Agaram2021-07-061-0/+51
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* primitives for double-bufferingKartik K. Agaram2021-07-051-4/+152
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I thought I needed these for this bouncing-ball demo: def (bounce screen) with (w (width screen) h (height screen) cx 16 cy 16 dx 12 dy 19) while 1 clear screen ring screen cx cy 16 3 5 cx += dx cy += dy when (or (cx > w) (cx < 0)) set dx 0-dx when (or (cy > h) (cy < 0)) set dy 0-dy for _ 0 (< _ 100) ++_ # delay No matter how I adjusted the delay I couldn't get rid of the jitter. So I built a double-buffered version: (bounce2 . [def (bounce2 screen) with (w (width screen) h (height screen) cx 16 cy 16 dx 12 dy 19 screen2 (new_screen (columns screen) (lines screen))) while 1 clear screen2 ring screen2 cx cy 16 3 5 cx += dx cy += dy when (or (cx > w) (cx < 0)) set dx 0-dx when (or (cy > h) (cy < 0)) set dy 0-dy blit screen2 screen for _ 0 (< _ 100) ++_]) # delay But it didn't make a difference! Turns out nothing will help you when successive frames are too far apart. This is the correct tweak to `bounce`: - dx 12 - dy 19) + dx 1 + dy (/ 19 12)) Still, we'll keep double-buffering around for the future.
* shell: fix clear on screensKartik K. Agaram2021-07-051-1/+1
| | | | | | | Broken since commit c95648c96 on Jul 3. Unclear what test to write for this. Should clear-stream check for NULL? Should apply-clear?
* expose Mu implementation of 'bezier'Kartik K. Agaram2021-07-051-1/+256
| | | | Still no support for acute-angled control points.
* replace 'circle' with Mu implementationKartik K. Agaram2021-07-052-19/+161
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* replace 'vline' with Mu implementationKartik K. Agaram2021-07-052-6/+162
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* replace 'hline' with Mu implementationKartik K. Agaram2021-07-052-9/+165
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* replace 'line' with Mu implementationKartik K. Agaram2021-07-052-32/+196
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* grow code region yet againKartik K. Agaram2021-07-053-2/+16
| | | | We need a cleaner way to do this.
* .Kartik K. Agaram2021-07-051-1/+1
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* .Kartik K. Agaram2021-07-051-140/+140
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* reading from streamsKartik K. Agaram2021-07-038-23/+206
| | | | | | The Mu shell has no string literals, only streams. No random access, only sequential access. But I've been playing fast and loose with its read pointer until now. Hopefully things are cleaned up now.
* alistsKartik K. Agaram2021-07-031-0/+13
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* new primitive: cons?Kartik K. Agaram2021-07-031-1/+42
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* .Kartik K. Agaram2021-07-031-5/+10
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* .Kartik K. Agaram2021-07-031-4/+4
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* reorg primitives on screenKartik K. Agaram2021-07-022-43/+80
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* clean up final abort in macroexpandKartik K. Agaram2021-06-302-1/+14
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