shithub: picker

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produce not-so-romantic gradients in rgb mode

--- a/picker.c

+++ b/picker.c

@@ -19,7 +19,7 @@

 	Numchan,

 	Offset = 6,

-	Sliderheight = 32,

+	Sliderheight = 48,

 };

 typedef struct Color Color;

@@ -36,6 +36,7 @@

 struct Mode {

 	char *name;

 	char opt;

+	char single;

 	void (*torgb)(double *v, double *rgb);

 	void (*fromrgb)(double *rgb, double *v);

 	double max[4];

@@ -68,17 +69,17 @@

 static void

 _torgb(double *v, double *rgb)

 {

-	v[0] = rgb[0];

-	v[1] = rgb[1];

-	v[2] = rgb[2];

+	rgb[0] = v[0];

+	rgb[1] = v[1];

+	rgb[2] = v[2];

 }

 static void

 _fromrgb(double *rgb, double *v)

 {

-	rgb[0] = v[0];

-	rgb[1] = v[1];

-	rgb[2] = v[2];

+	v[0] = rgb[0];

+	v[1] = rgb[1];

+	v[2] = rgb[2];

 }

 static Mode modes[] = {

@@ -85,6 +86,7 @@

 	{

 		.name = "HSLuv",

 		.opt = 's',

+		.single = 0,

 		.torgb = _hsluv2rgb,

 		.fromrgb = _rgb2hsluv,

 		.max = {360.0, 100.0, 100.0, 1.0},

@@ -92,6 +94,7 @@

 	{

 		.name = "HPLuv",

 		.opt = 'l',

+		.single = 0,

 		.torgb = _hpluv2rgb,

 		.fromrgb = _rgb2hpluv,

 		.max = {360.0, 100.0, 100.0, 1.0},

@@ -99,6 +102,7 @@

 	{

 		.name = "RGB",

 		.opt = 'r',

+		.single = 1,

 		.torgb = _torgb,

 		.fromrgb = _fromrgb,

 		.max = {1.0, 1.0, 1.0, 1.0},

@@ -105,6 +109,9 @@

 	},

 };

+static char *menu2i[nelem(modes)+1];

+static Menu menu2 = { .item = menu2i };

+

 static Color *colors;

 static int ncolors, curcolor, nchan;

 static Rectangle srects[3];

@@ -111,12 +118,18 @@

 static Mode *mode;

 static Image *bg;

+static ulong

+rgba2u(double *rgba)

+{

+	return D2C(rgba[0])<<24 | D2C(rgba[1])<<16 | D2C(rgba[2])<<8 | D2C(rgba[3]);

+}

+

 static Image *

 slider(int si, int w)

 {

 	static Image *s, *sliders[4];

 	static u8int *b, *buf[4];

-	double c[4], rgb[3], dt;

+	double c[4], rgba[4], dt;

 	Rectangle rect;

 	int i, n, mi;

 	ulong u;

@@ -133,12 +146,18 @@

 	b = buf[si];

 	memmove(c, colors[curcolor].v, sizeof(c));

+	if (mode->single) {

+		memset(c, 0, 3*sizeof(double));

+		c[si] = colors[curcolor].v[si];

+	}

 	dt = mode->max[si] / w;

 	mi = c[si] / dt;

 	c[si] = 0.0;

 	for (i = n = 0; i < w; i++, n += 4) {

-		mode->torgb(c, rgb);

-		u = setalpha(D2C(rgb[0])<<24 | D2C(rgb[1])<<16 | D2C(rgb[2])<<8, D2C(c[3]));

+		mode->torgb(c, rgba);

+		rgba[3] = c[3];

+		u = rgba2u(rgba);

+		u = setalpha(u, u&0xff);

 		b[n] = 0xff;

 		if (mi-2 == i)

 			memset(b+n+1, 0, 3);

@@ -337,6 +356,9 @@

 		mode->fromrgb(colors[i].rgba, colors[i].v);

 	}

+	for (i = 0; i < nelem(modes); i++)

+		menu2i[i] = modes[i].name;

+

 	if (initdraw(nil, nil, "picker") < 0)

 		sysfatal("initdraw: %r");

 	if ((kctl = initkeyboard(nil)) == nil)

@@ -387,8 +409,10 @@

 						ulong u;

 						c->v[i] = MIN(mode->max[i], (double)(m.xy.x - r.min.x) * mode->max[i]/(double)(Dx(r)-1));

+						c->rgba[3] = c->v[3];

+changed:

 						mode->torgb(c->v, c->rgba);

-						u = D2C(c->rgba[0])<<24 | D2C(c->rgba[1])<<16 | D2C(c->rgba[2])<<8 | D2C(c->v[3]);

+						u = rgba2u(c->rgba);

 						if (c->u != u) {

 							c->u = u;

 							if (nchan < 4)

@@ -397,8 +421,8 @@

 								j = sprint(buf, "%d %08lux\n", curcolor, u);

 							if (write(1, buf, j) != j)

 								goto end;

-							redraw();

 						}

+						redraw();

 						goto next;

 					}

 				}

@@ -408,6 +432,14 @@

 						redraw();

 						goto next;

 					}

+				}

+			} else if (m.buttons == 2) {

+				if ((i = menuhit(2, mctl, &menu2, nil)) >= 0 && i < nelem(modes)) {

+					mode = &modes[i];

+					mode->fromrgb(c->rgba, c->v);

+					for (i = 0; i < 3; i++)

+						c->v[i] = MAX(0.0, MIN(mode->max[i], c->v[i]));

+					goto changed;

 				}

 			}

 			break;