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Fixed the "disappearing triangle" bug. The triangle happens to be more 

2001-01-21  Simon Budig  <simon@gimp.org>

        * modules/colorsel_triangle.c: Fixed the "disappearing
        triangle" bug. The triangle happens to be more triangular
        now too...   :-)
This commit is contained in:
Simon Budig 2001-01-21 21:17:08 +00:00 committed by Simon Budig
parent 4099ad4204
commit 7bba2501f0
2 changed files with 93 additions and 95 deletions
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6
ChangeLog
View File

@ -1,3 +1,9 @@
2001-01-21 Simon Budig <simon@gimp.org>
* modules/colorsel_triangle.c: Fixed the "disappearing
triangle" bug. The triangle happens to be more triangular
now too... :-)
2001-01-21 Sven Neumann <sven@gimp.org>
* plug-ins/script-fu/Makefile.am: removed interp_md5.[ch] from

182
modules/colorsel_triangle.c
View File

@ -49,6 +49,16 @@ static void colorsel_triangle_free (gpointer selector_data);
static void colorsel_triangle_set_color (gpointer selector_data,
const GimpHSV *hsv,
const GimpRGB *rgb);
static void colorsel_xy_to_triangle_buf (const gint x,
const gint y,
const gdouble hue,
guchar *buf,
const gint sx,
const gint sy,
const gint vx,
const gint vy,
const gint hx,
const gint hy);
/* local methods */
@ -66,7 +76,7 @@ static GimpModuleInfo info =
NULL,
N_("Painter-style color selector as a pluggable color selector"),
"Simon Budig <Simon.Budig@unix-ag.org>",
"v0.02",
"v0.03",
"(c) 1999, released under the GPL",
"17 Jan 1999"
};
@ -117,8 +127,6 @@ typedef struct _ColorSelect ColorSelect;
static GtkWidget * create_preview (ColorSelect *coldata);
static void color_select_update_rgb_values (ColorSelect *coldata);
static void update_previews (ColorSelect *coldata,
gboolean hue_changed);
@ -240,12 +248,6 @@ colorsel_triangle_set_color (gpointer selector_data,
/*************************************************************/
/* helper functions */
static void
color_select_update_rgb_values (ColorSelect *csp)
{
gimp_hsv_to_rgb (&csp->hsv, &csp->rgb);
}
static void
update_previews (ColorSelect *coldata,
gint hue_changed)
@ -254,34 +256,37 @@ update_previews (ColorSelect *coldata,
guchar buf[3 * PREVIEWSIZE];
gint x, y, k, r2, dx, col;
gint x0, y0;
gdouble hue, sat, val, s, v, atn;
gdouble hue, sat, val, atn;
gint hx,hy, sx,sy, vx,vy;
hue = (gdouble) coldata->hsv.h * 2 * G_PI;
hx = sin (hue) * COLORTRIANGLERADIUS;
hy = cos (hue) * COLORTRIANGLERADIUS;
/* Colored point (value = 1, saturation = 1) */
hx = RINT (sin (hue) * COLORTRIANGLERADIUS);
hy = RINT (cos (hue) * COLORTRIANGLERADIUS);
sx = sin (hue - 2 * G_PI / 3) * COLORTRIANGLERADIUS;
sy = cos (hue - 2 * G_PI / 3) * COLORTRIANGLERADIUS;
/* Black point (value = 0, saturation not important) */
sx = RINT (sin (hue - 2 * G_PI / 3) * COLORTRIANGLERADIUS);
sy = RINT (cos (hue - 2 * G_PI / 3) * COLORTRIANGLERADIUS);
vx = sin (hue + 2 * G_PI / 3) * COLORTRIANGLERADIUS;
vy = cos (hue + 2 * G_PI / 3) * COLORTRIANGLERADIUS;
/* White point (value = 1, saturation = 0) */
vx = RINT (sin (hue + 2 * G_PI / 3) * COLORTRIANGLERADIUS);
vy = RINT (cos (hue + 2 * G_PI / 3) * COLORTRIANGLERADIUS);
hue = coldata->hsv.h * 360.0;
preview = coldata->preview;
if (hue_changed)
{
for (y = COLORWHEELRADIUS; y > -COLORWHEELRADIUS; y--)
for (y = COLORWHEELRADIUS; y >= -COLORWHEELRADIUS; y--)
{
dx = RINT (sqrt (fabs ((COLORWHEELRADIUS) * (COLORWHEELRADIUS) - y * y)));
dx = RINT (sqrt (fabs (COLORWHEELRADIUS * COLORWHEELRADIUS - y * y)));
for (x = -dx, k = 0; x <= dx; x++)
{
buf[k] = buf[k+1] = buf[k+2] = BGCOLOR;
r2 = (x * x) + (y * y);
if ( r2 <= COLORWHEELRADIUS * COLORWHEELRADIUS)
if (r2 <= COLORWHEELRADIUS * COLORWHEELRADIUS)
{
if (r2 > COLORTRIANGLERADIUS * COLORTRIANGLERADIUS)
{
@ -292,22 +297,7 @@ update_previews (ColorSelect *coldata,
}
else
{
val =
(gdouble) ( (x - sx) * (hy - vy) - (y - sy) * (hx - vx)) /
(gdouble) ((vx - sx) * (hy - vy) - (vy - sy) * (hx - vx));
if (val >= 0 && val<= 1)
{
/* normally val>=0, but this results in
graphics errors... */
sat =
(val == 0 ? 0: ((gdouble) (y - sy - val * (vy - sy)) /
(val * (gdouble) (hy - vy))));
if (sat >= 0 && sat <= 1)
gimp_hsv_to_rgb4 (buf + k, hue / 360, sat, val);
}
colorsel_xy_to_triangle_buf (x, y, hue, buf + k, hx, hy, sx, sy, vx, vy);
}
}
@ -316,17 +306,17 @@ update_previews (ColorSelect *coldata,
gtk_preview_draw_row (GTK_PREVIEW (preview), buf,
COLORWHEELRADIUS - dx,
COLORWHEELRADIUS - y - 1, 2 * dx + 1);
COLORWHEELRADIUS - y, 2 * dx + 1);
}
/* marker in outer ring */
x0 = RINT (sin (hue * G_PI / 180) *
((gdouble) (COLORWHEELRADIUS - COLORTRIANGLERADIUS + 1) / 2 +
COLORTRIANGLERADIUS) + 0.5);
COLORTRIANGLERADIUS));
y0 = RINT (cos (hue * G_PI / 180) *
((gdouble) (COLORWHEELRADIUS - COLORTRIANGLERADIUS + 1) / 2 +
COLORTRIANGLERADIUS) + 0.5);
COLORTRIANGLERADIUS));
atn = atan2 (x0, y0);
if (atn < 0)
@ -357,18 +347,18 @@ update_previews (ColorSelect *coldata,
}
gtk_preview_draw_row (GTK_PREVIEW (preview), buf,
COLORWHEELRADIUS + x0-4,
COLORWHEELRADIUS - 1 - y, 9);
COLORWHEELRADIUS + x0 - 4,
COLORWHEELRADIUS - y, 9);
}
}
else
{
/* delete marker in triangle */
s = coldata->oldsat;
v = coldata->oldval;
x0 = RINT (sx + (vx - sx) * v + (hx - vx) * s * v);
y0 = RINT (sy + (vy - sy) * v + (hy - vy) * s * v);
sat = coldata->oldsat;
val = coldata->oldval;
x0 = RINT (sx + (vx - sx) * val + (hx - vx) * sat * val);
y0 = RINT (sy + (vy - sy) * val + (hy - vy) * sat * val);
for (y = y0 - 4 ; y <= y0 + 4 ; y++)
{
@ -382,26 +372,11 @@ update_previews (ColorSelect *coldata,
atn = atan2 (x, y);
if (atn < 0)
atn = atn + 2 * G_PI;
gimp_hsv_to_rgb4 (buf + k, atn / (2 * G_PI), 1, 1);
}
else
{
val =
(gdouble) ( (x - sx) * (hy - vy) - (y - sy) * (hx - vx)) /
(gdouble) ((vx - sx) * (hy - vy) - (vy - sy) * (hx - vx));
if (val > 0 && val <= 1)
{
/* eigentlich val>=0, aber dann Grafikfehler... */
sat =
(val == 0 ? 0 : ((gdouble) (y - sy - val * (vy - sy)) /
(val * (gdouble) (hy - vy))));
if (sat >= 0 && sat <= 1)
gimp_hsv_to_rgb4 (buf + k, hue / 360, sat, val);
}
colorsel_xy_to_triangle_buf (x, y, hue, buf + k, hx, hy, sx, sy, vx, vy);
}
k += 3;
@ -409,24 +384,19 @@ update_previews (ColorSelect *coldata,
gtk_preview_draw_row (GTK_PREVIEW (preview), buf,
COLORWHEELRADIUS + x0 - 4,
COLORWHEELRADIUS - 1 - y, 9);
COLORWHEELRADIUS - y, 9);
}
coldata->oldsat = coldata->hsv.s;
coldata->oldval = coldata->hsv.v;
}
/* marker in triangle */
col = gimp_rgb_intensity (&coldata->rgb) > 0.5 ? 0 : 255;
s = coldata->hsv.s;
v = coldata->hsv.v;
coldata->oldsat = s;
coldata->oldval = v;
sat = coldata->oldsat = coldata->hsv.s;
val = coldata->oldval = coldata->hsv.v;
x0 = RINT (sx + (vx - sx) * v + (hx - vx) * s * v);
y0 = RINT (sy + (vy - sy) * v + (hy - vy) * s * v);
x0 = RINT (sx + (vx - sx) * val + (hx - vx) * sat * val);
y0 = RINT (sy + (vy - sy) * val + (hy - vy) * sat * val);
for (y = y0 - 4 ; y <= y0 + 4 ; y++)
{
@ -444,28 +414,13 @@ update_previews (ColorSelect *coldata,
if (x * x + y * y > COLORTRIANGLERADIUS * COLORTRIANGLERADIUS)
{
atn = atan2 (x, y);
if (atn < 0)
atn = atn + 2 * G_PI;
gimp_hsv_to_rgb4 (buf + k, atn / (2 * G_PI), 1, 1);
}
else
{
val =
(gdouble) ( (x - sx) * (hy - vy) - (y - sy) * (hx - vx)) /
(gdouble) ((vx - sx) * (hy - vy) - (vy - sy) * (hx - vx));
if (val > 0 && val <= 1)
{
/* eigentlich val>=0, aber dann Grafikfehler... */
sat =
(val == 0 ? 0 : ((gdouble) (y - sy - val * (vy - sy)) /
(val * (gdouble) (hy - vy))));
if (sat >= 0 && sat <= 1)
gimp_hsv_to_rgb4 (buf + k, hue / 360, sat, val);
}
colorsel_xy_to_triangle_buf (x, y, hue, buf + k, hx, hy, sx, sy, vx, vy);
}
}
@ -474,12 +429,46 @@ update_previews (ColorSelect *coldata,
gtk_preview_draw_row (GTK_PREVIEW (preview), buf,
COLORWHEELRADIUS + x0 - 4,
COLORWHEELRADIUS - 1 - y, 9);
COLORWHEELRADIUS - y, 9);
}
gtk_widget_draw (preview, NULL);
}
static void
colorsel_xy_to_triangle_buf (const gint x, const gint y,
const gdouble hue, guchar *buf,
const gint hx, const gint hy, /* colored point */
const gint sx, const gint sy, /* black point */
const gint vx, const gint vy) /* white point */
{
gdouble sat, val;
/*
* The value is 1 - (the distance from the H->V line).
* I forgot the linear algebra behind it...
*/
val = (gdouble) ( (x - sx) * (hy - vy) - (y - sy) * (hx - vx)) /
(gdouble) ((vx - sx) * (hy - vy) - (vy - sy) * (hx - vx));
if (val >= 0 && val<= 1)
{
if (abs (hy - vy) < abs (hx - vx))
{
sat = (val == 0 ? 0: ((gdouble) (x - sx - val * (vx - sx)) /
(val * (hx - vx))));
}
else
{
sat = (val == 0 ? 0: ((gdouble) (y - sy - val * (vy - sy)) /
(val * (hy - vy))));
}
/* Yes, this ugly 1.00*01 fixes some subtle rounding errors... */
if (sat >= 0 && sat <= 1.000000000000001)
gimp_hsv_to_rgb4 (buf, hue / 360, sat, val);
}
}
/*
* Color Preview
@ -546,11 +535,11 @@ color_selection_callback (GtkWidget *widget,
if (coldata->mode == 1 ||
(r > COLORWHEELRADIUS &&
(abs (angle - coldata->hsv.h * 260.0) < 30 ||
(abs (angle - coldata->hsv.h * 360.0) < 30 ||
abs (abs (angle - coldata->hsv.h * 360.0) - 360) < 30)))
{
coldata->hsv.h = angle / 360.0;
color_select_update_rgb_values (coldata);
gimp_hsv_to_rgb (&coldata->hsv, &coldata->rgb);
update_previews (coldata, TRUE);
}
else
@ -568,7 +557,7 @@ color_selection_callback (GtkWidget *widget,
{
sat = 1;
val = ((gdouble) ( (x - sx) * (hx - sx) + (y - sy) * (hy - sy)))
/ ((hx - sx) * (hx - sx) + (hy - sy) * (hy - sy));
/ ((hx - sx) * (hx - sx) + (hy - sy) * (hy - sy));
if (val < 0)
val = 0;
else if (val > 1)
@ -578,7 +567,7 @@ color_selection_callback (GtkWidget *widget,
{
sat = 0;
val = ((gdouble) ( (x - sx) * (vx - sx) + (y - sy) * (vy - sy)))
/ ((vx - sx) * (vx - sx) + (vy - sy) * (vy - sy));
/ ((vx - sx) * (vx - sx) + (vy - sy) * (vy - sy));
if (val < 0)
val = 0;
else if (val > 1)
@ -588,7 +577,7 @@ color_selection_callback (GtkWidget *widget,
{
val = 1;
sat = ((gdouble) ( (x - vx) * (hx - vx) + (y - vy) * (hy - vy)))
/ ((hx - vx) * (hx - vx) + (hy - vy) * (hy - vy));
/ ((hx - vx) * (hx - vx) + (hy - vy) * (hy - vy));
if (sat < 0)
sat = 0;
else if (sat > 1)
@ -597,7 +586,7 @@ color_selection_callback (GtkWidget *widget,
else
{
val = (gdouble) ( (x - sx) * (hy - vy) - (y - sy) * (hx - vx))
/ (gdouble) ((vx - sx) * (hy - vy) - (vy - sy) * (hx - vx));
/ (gdouble) ((vx - sx) * (hy - vy) - (vy - sy) * (hx - vx));
if (val <= 0)
{
val = 0;
@ -607,7 +596,10 @@ color_selection_callback (GtkWidget *widget,
{
if (val > 1)
val = 1;
sat = (gdouble) (y - sy - val * (vy - sy)) / (val * (gdouble) (hy - vy));
if (hy == vy)
sat = (gdouble) (x - sx - val * (vx - sx)) / (val * (gdouble) (hx - vx));
else
sat = (gdouble) (y - sy - val * (vy - sy)) / (val * (gdouble) (hy - vy));
if (sat < 0)
sat = 0;
else if (sat > 1)
@ -617,7 +609,7 @@ color_selection_callback (GtkWidget *widget,
coldata->hsv.s = sat;
coldata->hsv.v = val;
color_select_update_rgb_values (coldata);
gimp_hsv_to_rgb (&coldata->hsv, &coldata->rgb);
update_previews (coldata, FALSE);
}