shithub: picker

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background for transparency

--- a/picker.c

+++ b/picker.c

@@ -7,8 +7,8 @@

 #include <keyboard.h>

 #include "hsluv.h"

-#define MAX(a,b) ((a)>(b)?(a):(b))

-#define MIN(a,b) ((a)<(b)?(a):(b))

+#define MAX(a,b) ((a)>=(b)?(a):(b))

+#define MIN(a,b) ((a)<=(b)?(a):(b))

 #define D2C(x) (int)MAX(0, MIN(0xff, x*256.0))

 enum

@@ -109,6 +109,7 @@

 static int ncolors, curcolor, nchan;

 static Rectangle srects[3];

 static Mode *mode;

+static Image *bg;

 static Image *

 slider(int si, int w)

@@ -183,6 +184,7 @@

 	for (i = 0; i < nchan; i++) {

 		srects[i] = r;

 		im = slider(i, Dx(r));

+		draw(screen, r, bg, nil, ZP);

 		draw(screen, r, im, nil, ZP);

 		r.min.y += Sliderheight + Offset;

 		r.max.y += Sliderheight + Offset;

@@ -204,6 +206,7 @@

 		}

 		cr.max.x = cr.min.x + colw;

+		draw(screen, cr, bg, nil, ZP);

 		draw(screen, cr, colors[i].i, nil, ZP);

 		colors[i].r = insetrect(cr, -3);

 		if (i == curcolor)

@@ -214,6 +217,7 @@

 	/* current color */

 	r.max.y = screen->r.max.y - Offset;

+	draw(screen, r, bg, nil, ZP);

 	draw(screen, r, colors[curcolor].i, nil, ZP);

 	/* current color in hex */

@@ -234,14 +238,38 @@

 {

 	int i;

-	print("usage: %s [-a] [-", argv0);

+	print("usage: %s [-", argv0);

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

 		print("%c", modes[i].opt);

-	print("] rrggbbaa ...\n");

+	print("] [-a] rrggbb[aa] ...\n");

 	threadexitsall("usage");

 }

+static void

+loadbg(void)

+{

+	Rectangle r;

+	u8int *d;

+	int i, j;

+

+	r = Rect(0, 0, Sliderheight, Sliderheight);

+	d = calloc(1, Sliderheight*Sliderheight);

+	for (i = 0; i < Sliderheight/2; i++) {

+		for (j = 0; j < Sliderheight/2; j++)

+			d[j*Sliderheight+i] = 0xff;

+	}

+	for (; i < Sliderheight; i++) {

+		for (j = Sliderheight/2; j < Sliderheight; j++)

+			d[j*Sliderheight+i] = 0xff;

+	}

+	if ((bg = allocimage(display, r, GREY8, 1, DNofill)) == nil)

+		sysfatal("allocimage: %r");

+	if (loadimage(bg, r, d, Sliderheight*Sliderheight) < 0)

+		sysfatal("loadimage: %r");

+	free(d);

+}

+

 void

 threadmain(int argc, char **argv)

 {

@@ -320,6 +348,9 @@

 	a[Cresize].c = mctl->resizec;

 	display->locking = 1;

 	unlockdisplay(display);

+

+	if (nchan > 3)

+		loadbg();

 	redraw();