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	blind-triangle-tessellation.c - blind - suckless command-line video editing uti…
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	---
	blind-triangle-tessellation.c (2901B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include "common.h"
	3
	4 USAGE("[-F pixel-format] block-width block-height")
	5
	6 #define SET_XYZA(TYPE)\
	7 (colours = alloca(8 * stream.pixel_size),\
	8 ((TYPE *)colours)[ 0] = (TYPE)0.412457445582367600,\
	9 ((TYPE *)colours)[ 1] = (TYPE)0.212673370378408280,\
	10 ((TYPE *)colours)[ 2] = (TYPE)0.019333942761673460,\
	11 ((TYPE *)colours)[ 3] = (TYPE)1,\
	12 ((TYPE *)colours)[ 4] = (TYPE)0.206228722791183800,\
	13 ((TYPE *)colours)[ 5] = (TYPE)0.106336685189204140,\
	14 ((TYPE *)colours)[ 6] = (TYPE)0.009666971380836730,\
	15 ((TYPE *)colours)[ 7] = (TYPE)1,\
	16 ((TYPE *)colours)[ 8] = (TYPE)0.770033310827883400,\
	17 ((TYPE *)colours)[ 9] = (TYPE)0.927825100869440000,\
	18 ((TYPE *)colours)[10] = (TYPE)0.138525897843512050,\
	19 ((TYPE *)colours)[11] = (TYPE)1,\
	20 ((TYPE *)colours)[12] = (TYPE)0.385016655413941700,\
	21 ((TYPE *)colours)[13] = (TYPE)0.463912550434720000,\
	22 ((TYPE *)colours)[14] = (TYPE)0.069262948921756020,\
	23 ((TYPE *)colours)[15] = (TYPE)1,\
	24 ((TYPE *)colours)[16] = (TYPE)0.357575865245515900,\
	25 ((TYPE *)colours)[17] = (TYPE)0.715151730491031800,\
	26 ((TYPE *)colours)[18] = (TYPE)0.119191955081838600,\
	27 ((TYPE *)colours)[19] = (TYPE)1,\
	28 ((TYPE *)colours)[20] = (TYPE)0.178787932622757940,\
	29 ((TYPE *)colours)[21] = (TYPE)0.357575865245515900,\
	30 ((TYPE *)colours)[22] = (TYPE)0.059595977540919300,\
	31 ((TYPE *)colours)[23] = (TYPE)1,\
	32 ((TYPE )colours)[24] = (TYPE)(1.0 D65_XYZ_X),\
	33 ((TYPE *)colours)[25] = (TYPE)(1.0),\
	34 ((TYPE )colours)[26] = (TYPE)(1.0 D65_XYZ_Z),\
	35 ((TYPE *)colours)[27] = (TYPE)1,\
	36 ((TYPE )colours)[28] = (TYPE)(0.5 D65_XYZ_X),\
	37 ((TYPE *)colours)[29] = (TYPE)(0.5),\
	38 ((TYPE )colours)[30] = (TYPE)(0.5 D65_XYZ_Z),\
	39 ((TYPE *)colours)[31] = (TYPE)1)
	40
	41 static struct stream stream = { .width = 0, .height = 0, .frames = 1 };
	42
	43 int
	44 main(int argc, char *argv[])
	45 {
	46 size_t width, height;
	47 const char *pixfmt = "xyza";
	48 char *colours;
	49 size_t x1, y1, x2, y2, k;
	50
	51 ARGBEGIN {
	52 case 'F':
	53 pixfmt = UARGF();
	54 break;
	55 default:
	56 usage();
	57 } ARGEND;
	58
	59 if (argc != 2)
	60 usage();
	61
	62 width = etozu_arg("block-width", argv[0], 1, SIZE_MAX);
	63 height = etozu_arg("block-height", argv[1], 1, SIZE_MAX);
	64
	65 eset_pixel_format(&stream, pixfmt);
	66 CHECK_N_CHAN(&stream, 4, 4);
	67 if (stream.encoding == DOUBLE)
	68 SET_XYZA(double);
	69 else if (stream.encoding == FLOAT)
	70 SET_XYZA(float);
	71 else
	72 eprintf("pixel format %s is not supported, try xyza\n", …
	73
	74 stream.width = 2 * width;
	75 stream.height = 2 * height;
	76 fprint_stream_head(stdout, &stream);
	77 efflush(stdout, "<stdout>");
	78
	79 for (y1 = 0; y1 < 2; y1++) {
	80 for (y2 = 0; y2 < height; y2++) {
	81 for (x1 = 0; x1 < 2; x1++) {
	82 for (x2 = 0; x2 < width; x2++) {
	83 k = y1 * 4 + x1 * 2 + (x2 * heig…
	84 ewriteall(STDOUT_FILENO, colours…
	85 }
	86 }
	87 }
	88 }
	89
	90 return 0;
	91 }