ref: 8c213f349db0bbec6fb4c503d41fcca4838ac13f
parent: db3441295e5660984a4a4f13f419d5f119c06d7b
author: Sigrid Haflínudóttir <ftrvxmtrx@gmail.com>
date: Sat Mar 14 12:46:12 EDT 2020
implement color pallete
--- a/picker.c
+++ b/picker.c
@@ -16,56 +16,68 @@
Cmouse,
Cresize,
Numchan,
+
+ Offset = 6,
+ Sliderheight = 32,
};
+typedef struct Color Color;
typedef struct Mode Mode;
+struct Color {+ Rectangle r;
+ double v[4];
+ double rgba[4];
+ ulong u;
+ Image *i;
+};
+
struct Mode {char *name;
char opt;
- void (*torgb)(double *x, double *r, double *g, double *b);
- void (*fromrgb)(double r, double g, double b, double *x);
+ void (*torgb)(double *v, double *rgb);
+ void (*fromrgb)(double *rgb, double *v);
double max[3];
};
static void
-_hsluv2rgb(double *x, double *r, double *g, double *b)
+_hsluv2rgb(double *v, double *rgb)
{- hsluv2rgb(x[0], x[1], x[2], r, g, b);
+ hsluv2rgb(v[0], v[1], v[2], rgb+0, rgb+1, rgb+2);
}
static void
-_rgb2hsluv(double r, double g, double b, double *x)
+_rgb2hsluv(double *rgb, double *v)
{- rgb2hsluv(r, g, b, x+0, x+1, x+2);
+ rgb2hsluv(rgb[0], rgb[1], rgb[2], v+0, v+1, v+2);
}
static void
-_hpluv2rgb(double *x, double *r, double *g, double *b)
+_hpluv2rgb(double *v, double *rgb)
{- hpluv2rgb(x[0], x[1], x[2], r, g, b);
+ hpluv2rgb(v[0], v[1], v[2], rgb+0, rgb+1, rgb+2);
}
static void
-_rgb2hpluv(double r, double g, double b, double *x)
+_rgb2hpluv(double *rgb, double *v)
{- rgb2hpluv(r, g, b, x+0, x+1, x+2);
+ rgb2hpluv(rgb[0], rgb[1], rgb[2], v+0, v+1, v+2);
}
static void
-_rgbto(double *x, double *r, double *g, double *b)
+_torgb(double *v, double *rgb)
{- *r = x[0];
- *g = x[1];
- *b = x[2];
+ v[0] = rgb[0];
+ v[1] = rgb[1];
+ v[2] = rgb[2];
}
static void
-_rgbfrom(double r, double g, double b, double *x)
+_fromrgb(double *rgb, double *v)
{- x[0] = r;
- x[1] = g;
- x[2] = b;
+ rgb[0] = v[0];
+ rgb[1] = v[1];
+ rgb[2] = v[2];
}
static Mode modes[] = {@@ -86,30 +98,30 @@
{.name = "RGB",
.opt = 'r',
- .torgb = _rgbto,
- .fromrgb = _rgbfrom,
+ .torgb = _torgb,
+ .fromrgb = _fromrgb,
.max = {1.0, 1.0, 1.0},},
};
-static double *colors;
-static int ncolors, curcolor, alpha;
+static Color *colors;
+static int ncolors, curcolor, nchan;
+static Rectangle srects[3];
static Mode *mode;
static Image *
slider(int si, int w)
{- static Image *s, *sliders[3];
- static u8int *b, *buf[3];
+ static Image *s, *sliders[4];
+ static u8int *b, *buf[4];
+ double c[4], rgb[3], dt;
Rectangle rect;
- double c[3];
- double rgb[3], dt;
- int i, mi;
+ int i, n, mi;
rect = Rect(0, 0, w, 1);
s = sliders[si];
if (s == nil || Dx(s->r) != w) {- buf[si] = realloc(buf[si], 3*w);
+ buf[si] = realloc(buf[si], 4*w);
if (s != nil)
freeimage(s);
if ((s = sliders[si] = allocimage(display, rect, BGR24, 1, DNofill)) == nil)
@@ -117,19 +129,26 @@
}
b = buf[si];
- memmove(c, &colors[4*curcolor], sizeof(c));
+ memmove(c, colors[curcolor].v, sizeof(c));
dt = mode->max[si] / w;
mi = c[si] / dt;
c[si] = 0.0;
- for (i = 0; i < w; i++) {- mode->torgb(c, &rgb[0], &rgb[1], &rgb[2]);
- b[i*3+0] = rgb[0]*255.0;
- b[i*3+1] = rgb[1]*255.0;
- b[i*3+2] = rgb[2]*255.0;
- if (mi == i) {- b[i*3+0] = ~b[i*3+0];
- b[i*3+1] = ~b[i*3+1];
- b[i*3+2] = ~b[i*3+2];
+ for (i = n = 0; i < w; i++, n += 3) {+ mode->torgb(c, rgb);
+ b[n+0] = MAX(0, MIN(0xff, rgb[0]*0xff));
+ b[n+1] = MAX(0, MIN(0xff, rgb[1]*0xff));
+ b[n+2] = MAX(0, MIN(0xff, rgb[2]*0xff));
+ if (mi-2 == i)
+ memset(b+n, 0, 3);
+ else if (mi-1 == i)
+ memset(b+n, 0xff, 3);
+ else if (mi+1 == i)
+ memset(b+n, 0xff, 3);
+ else if (mi+2 == i)
+ memset(b+n, 0, 3);
+ else if (mi == i) {+ memmove(colors[curcolor].rgba, rgb, sizeof(rgb));
+ colors[curcolor].u = b[n+0]<<24 | b[n+1]<<16 | b[n+2]<<8 | (colors[curcolor].u & 0xff);
}
c[si] = MIN(mode->max[si], c[si] + dt);
}
@@ -141,41 +160,66 @@
static void
redraw(void)
{- Rectangle r;
- int dh, i;
+ Rectangle r, cr;
Image *im;
- double rgb[3];
- ulong u;
char hex[8];
+ int i, colw;
lockdisplay(display);
- //draw(screen, screen->r, display->black, nil, ZP);
+ draw(screen, screen->r, display->white, nil, ZP);
r = screen->r;
- dh = Dy(r) / 4;
- r.max.y = r.min.y + dh;
- for (i = 0; i < 3; i++) {- im = slider(i, Dx(screen->r));
+ r.min.x += Offset;
+ r.min.y += Offset;
+ r.max.x -= Offset;
+ r.max.y = r.min.y + Sliderheight;
+
+ /* sliders */
+ for (i = 0; i < nchan; i++) {+ srects[i] = r;
+ im = slider(i, Dx(r));
draw(screen, r, im, nil, ZP);
- r.min.y += dh;
- r.max.y += dh;
+ r.min.y += Sliderheight + Offset;
+ r.max.y += Sliderheight + Offset;
}
- mode->torgb(&colors[4*curcolor], &rgb[0], &rgb[1], &rgb[2]);
- for (i = 0; i < 3; i++)
- rgb[i] = MAX(0.0, MIN(255.0, rgb[i]*255.0));
- u = (ulong)rgb[0]<<24 | (ulong)rgb[1]<<16 | (ulong)rgb[2]<<8 | 0xff;
- im = allocimage(display, Rect(0, 0, 1, 1), BGR24, 1, u);
- draw(screen, r, im, nil, ZP);
- freeimage(im);
+ /* palette */
+ colw = MIN(Sliderheight, (Dx(r)-(ncolors-1)*Offset)/ncolors);
+ cr = r;
+ cr.min.x += (Dx(cr) - colw*ncolors - (ncolors-1)*Offset) / 2;
+ for (i = 0; i < ncolors; i++) {+ if (i == curcolor) {+ freeimage(colors[i].i);
+ colors[i].i = nil;
+ }
+ if (colors[i].i == nil) {+ colors[i].i = allocimage(display, Rect(0, 0, 1, 1), BGR24, 1, colors[i].u);
+ if (colors[i].i == nil)
+ sysfatal("allocimage: %r");+ }
- im = allocimage(display, Rect(0, 0, 1, 1), BGR24, 1, ~u);
- sprint(hex, "#%06lux", u>>8);
+ cr.max.x = cr.min.x + colw;
+ draw(screen, cr, colors[i].i, nil, ZP);
+ colors[i].r = insetrect(cr, -3);
+ if (i == curcolor)
+ border(screen, colors[i].r, 2, display->black, ZP);
+ cr.min.x += colw + Offset;
+ }
+ r.min.y += Sliderheight + Offset;
+
+ /* current color */
+ r.max.y = screen->r.max.y - Offset;
+ draw(screen, r, colors[curcolor].i, nil, ZP);
+
+ /* current color in hex */
+ if (nchan > 3)
+ sprint(hex, "#%08lux", colors[curcolor].u);
+ else
+ sprint(hex, "#%06lux", colors[curcolor].u>>8);
r.min.x += Dx(r)/2 - 7*stringwidth(font, "#")/2;
- r.min.y += dh/2 - font->height/2;
- string(screen, r.min, im, ZP, font, hex);
- freeimage(im);
+ r.min.y += Dy(r)/2 - font->height/2;
+ stringbg(screen, r.min, display->white, ZP, font, hex, display->black, ZP);
flushimage(display, 1);
unlockdisplay(display);
@@ -209,12 +253,13 @@
};
char *s;
vlong v;
- int i;
+ int i, j;
mode = &modes[0];
+ nchan = 3;
ARGBEGIN{case 'a':
- alpha = 1;
+ nchan = 4;
break;
default:
mode = nil;
@@ -236,21 +281,18 @@
fprint(2, "no colors specified\n");
usage();
}
- colors = calloc(ncolors, 4*sizeof(double));
+ colors = calloc(ncolors, sizeof(Color));
for (i = 0; i < ncolors; i++) {- double r, g, b;
if ((v = strtoll(argv[i], &s, 0)) == 0 && (s == argv[i] || *s || v > 0xffffffff || v < 0)) {fprint(2, "invalid color '%s'\n", argv[i]);
usage();
}
- mode->fromrgb(
- (double)((v>>24)&0xff) / 255.0,
- (double)((v>>16)&0xff) / 255.0,
- (double)((v>>8)&0xff) / 255.0,
- &colors[i*4]
- );
- colors[i*4+3] = (double)(v&0xff) / 255.0;
- mode->torgb(&colors[i*4], &r, &g, &b);
+ colors[i].u = v;
+ for (j = 0; j < 4; j++) {+ colors[i].rgba[j] = (double)((v>>24)&0xff) / 255.0;
+ v <<= 8;
+ }
+ mode->fromrgb(colors[i].rgba, colors[i].v);
}
if (initdraw(nil, nil, "picker") < 0)
@@ -268,7 +310,7 @@
redraw();
for (;;) {-
+next:
switch (alt(a)) {case -1:
goto end;
@@ -290,18 +332,22 @@
case Cmouse:
if (m.buttons == 1) {- Point p;
- int dh;
- p = screen->r.min;
- dh = Dy(screen->r)/4;
m.xy.x = MAX(screen->r.min.x, MIN(screen->r.max.x, m.xy.x));
- for (i = 0; i < 3; i++) {- if (m.xy.y >= p.y && m.xy.y < p.y+dh) {- colors[4*curcolor+i] = MIN(mode->max[i], (m.xy.x - screen->r.min.x) * mode->max[i]/Dx(screen->r));
+ for (i = 0; i < nchan; i++) {+ Rectangle r = srects[i];
+ r.max.x += 1;
+ if (ptinrect(m.xy, r)) {+ colors[curcolor].v[i] = MIN(mode->max[i], (m.xy.x - r.min.x) * mode->max[i]/Dx(r));
redraw();
- break;
+ goto next;
}
- p.y += dh;
+ }
+ for (i = 0; i < ncolors; i++) {+ if (ptinrect(m.xy, colors[i].r)) {+ curcolor = i;
+ redraw();
+ goto next;
+ }
}
}
break;