static void
color_reverse(const GdkColor *a, GdkColor *b) {
gdouble red;
gdouble green;
gdouble blue;
gdouble h;
gdouble s;
gdouble v;
red = (gdouble) a->red / 65535.0;
green = (gdouble) a->green / 65535.0;
blue = (gdouble) a->blue / 65535.0;
gtk_rgb_to_hsv (red, green, blue, &h, &s, &v);
/* pivot brightness around the center */
v = 0.5 + (0.5 - v);
if (v > 1.0)
v = 1.0;
else if (v < 0.0)
v = 0.0;
/* reduce saturation by 50% */
s *= 0.5;
gtk_hsv_to_rgb (h, s, v, &red, &green, &blue);
b->red = red * 65535.0;
b->green = green * 65535.0;
b->blue = blue * 65535.0;
}
static void
color_reverse (const GdkColor *a,
GdkColor *b)
{
gdouble red;
gdouble green;
gdouble blue;
gdouble h;
gdouble s;
gdouble v;
red = (gdouble) a->red / 65535.0;
green = (gdouble) a->green / 65535.0;
blue = (gdouble) a->blue / 65535.0;
gtk_rgb_to_hsv (red, green, blue, &h, &s, &v);
v = 0.5 + (0.5 - v);
if (v > 1.0)
v = 1.0;
else if (v < 0.0)
v = 0.0;
gtk_hsv_to_rgb (h, s, v, &red, &green, &blue);
b->red = red * 65535.0;
b->green = green * 65535.0;
b->blue = blue * 65535.0;
}
static void
color_reverse (GdkRGBA *a)
{
gdouble red;
gdouble green;
gdouble blue;
gdouble h;
gdouble s;
gdouble v;
red = a->red;
green = a->green;
blue = a->blue;
gtk_rgb_to_hsv (red, green, blue, &h, &s, &v);
v = 0.5 + (0.5 - v);
if (v > 1.0)
v = 1.0;
else if (v < 0.0)
v = 0.0;
gtk_hsv_to_rgb (h, s, v, &red, &green, &blue);
a->red = red;
a->green = green;
a->blue = blue;
}
void on_colorselection_color_changed (GtkColorSelection *colorselection, gpointer user_data)
{
char szhsv[64];
gdouble r, g, b;
gdouble h, s, v;
gtk_color_selection_get_current_color (colorselection, &colorvalue);
r = 1.0 * colorvalue.red / 65535;
g = 1.0 * colorvalue.green / 65535;
b = 1.0 * colorvalue.blue / 65535;
gtk_rgb_to_hsv(r, g, b, &h, &s, &v);
snprintf(szhsv, sizeof(szhsv), "OpenCV H: %hu S: %hu V: %hu",
(uint16_t)nearbyint(h * 180.0),
(uint16_t)nearbyint(s * 255.0),
(uint16_t)nearbyint(v * 255.0));
gtk_entry_set_text((GtkEntry *)mytext, szhsv);
}
int main(void) {
gdouble h,s,v,r,g,b;
uint16_t H,S,V,R,G,B;
TColor RGB;
TColor HSV;
int Hi,Si,Vi,Ri,Gi,Bi;
int T;
int Errors = 0;
int Error;
int TotalError = 0;
#ifdef TEST_HSV2RGB
// Test HSV2RGB
for (Vi = 0; Vi <= 100; Vi++) {
v = Vi*1.0/100.0;
for (Si = 0; Si <= 100; Si++) {
s = Si*1.0/100.0;
for (Hi = 0; Hi < 360; Hi++) {
h = Hi*1.0/360.0;
gtk_hsv_to_rgb(h,s,v,&r,&g,&b);
H = round(h*65535.0);
S = round(s*65535.0);
V = round(v*65535.0);
R = round(r*65535.0);
G = round(g*65535.0);
B = round(b*65535.0);
HSV.HSV.H = H;
HSV.HSV.S = S;
HSV.HSV.V = V;
HSV2RGB(&HSV,&RGB);
Error = abs((int)RGB.RGB.R-(int)R) + abs((int)RGB.RGB.G-(int)G) + abs((int)RGB.RGB.B-(int)B);
if (Error > MAXDIFF) {
printf("HSV2RGB %3d %3d %3d: %5d %5d %5d -> %5d %5d %5d",
Hi,Si,Vi,
H,S,V,
RGB.RGB.R,RGB.RGB.G,RGB.RGB.B);
printf(" (should be %5d %5d %5d, Error = %d)",R,G,B,Error);
printf("\n");
TotalError += Error;
Errors++;
}
}
}
}
#endif // TEST_HSV2RGB
#ifdef TEST_RGB2HSV
// Test RGB2HSV
for (Bi = 0; Bi <= 100; Bi++) {
b = Bi*1.0/100.0;
for (Gi = 0; Gi <= 100; Gi++) {
g = Gi*1.0/100.0;
for (Ri = 0; Ri <= 100; Ri++) {
r = Ri*1.0/100.0;
gtk_rgb_to_hsv(r,g,b,&h,&s,&v);
R = round(r*65535.0);
G = round(g*65535.0);
B = round(b*65535.0);
H = round(h*65535.0);
S = round(s*65535.0);
V = round(v*65535.0);
RGB.RGB.R = R;
RGB.RGB.G = G;
RGB.RGB.B = B;
RGB2HSV(&RGB,&HSV);
Error = abs((int)HSV.HSV.H-(int)H) + abs((int)HSV.HSV.S-(int)S) + abs((int)HSV.HSV.V-(int)V);
if (Error > MAXDIFF) {
printf("RGB2HSV %3d %3d %3d: %5d %5d %5d -> %5d %5d %5d",
Ri,Gi,Bi,
R,G,B,
HSV.HSV.H,HSV.HSV.S,HSV.HSV.V);
printf(" (should be %5d %5d %5d, Error = %d)",H,S,V,Error);
printf("\n");
TotalError += Error;
Errors++;
}
}
}
}
#endif // TEST_RGB2HSV
#ifdef TEST_WHITE2RGB
printf("<pre>\n");
for (T = 1000; T <= 40000; T+=100) {
White2RGB(T,&RGB);
printf("<span style=\"background:#%02x%02x%02x\"> %5d K -> %5d %5d %5d - #%02x%02x%02x</span>\n",
RGB.RGB.R >> 8,RGB.RGB.G >> 8,RGB.RGB.B >> 8,
T,
RGB.RGB.R,RGB.RGB.G,RGB.RGB.B,
RGB.RGB.R >> 8,RGB.RGB.G >> 8,RGB.RGB.B >> 8);
}
printf("</pre>\n");
#endif
printf("%d errors found, total deviation is %d.\n",Errors,TotalError);
return (Errors == 0 ? 0 : 1);
}
static gboolean dt_iop_area_draw(GtkWidget *widget, cairo_t *cr, dt_iop_module_t *self)
{
float flt_bg = darktable.bauhaus->bg_normal;
if(gtk_widget_get_state(GTK_WIDGET(widget)) == GTK_STATE_SELECTED) flt_bg = darktable.bauhaus->bg_focus;
float flt_dark = flt_bg / 1.5, flt_light = flt_bg * 1.5;
uint32_t bg = ((255 << 24) | ((int)floor(flt_bg * 255 + 0.5) << 16) | ((int)floor(flt_bg * 255 + 0.5) << 8)
| (int)floor(flt_bg * 255 + 0.5));
// bg = 0xffffffff;
// uint32_t dark = ((255 << 24) |
// ((int)floor(flt_dark * 255 + 0.5) << 16) |
// ((int)floor(flt_dark * 255 + 0.5) << 8) |
// (int)floor(flt_dark * 255 + 0.5));
uint32_t light = ((255 << 24) | ((int)floor(flt_light * 255 + 0.5) << 16)
| ((int)floor(flt_light * 255 + 0.5) << 8) | (int)floor(flt_light * 255 + 0.5));
GtkAllocation allocation;
gtk_widget_get_allocation(widget, &allocation);
int width = allocation.width, height = allocation.height;
if(width % 2 == 0) width--;
if(height % 2 == 0) height--;
double center_x = (float)width / 2.0, center_y = (float)height / 2.0;
double diameter = MIN(width, height) - 4;
double r_outside = diameter / 2.0, r_inside = r_outside * 0.87;
double r_outside_2 = r_outside * r_outside, r_inside_2 = r_inside * r_inside;
// clear the background
cairo_set_source_rgb(cr, flt_bg, flt_bg, flt_bg);
cairo_paint(cr);
/* Create an image initialized with the ring colors */
gint stride = cairo_format_stride_for_width(CAIRO_FORMAT_RGB24, width);
guint32 *buf = (guint32 *)malloc(sizeof(guint32) * height * stride / 4);
for(int y = 0; y < height; y++)
{
guint32 *p = buf + y * width;
double dy = -(y + 0.5 - center_y);
for(int x = 0; x < width; x++)
{
double dx = x + 0.5 - center_x;
double dist = dx * dx + dy * dy;
if(dist < r_inside_2 || dist > r_outside_2)
{
uint32_t col = bg;
if((abs(dx) < 1 && abs(dy) < 3) || (abs(dx) < 3 && abs(dy) < 1)) col = light;
*p++ = col;
continue;
}
double angle = atan2(dy, dx) - M_PI_2;
if(angle < 0.0) angle += 2.0 * M_PI;
double hue = angle / (2.0 * M_PI);
float rgb[3];
hsl2rgb(rgb, hue, 1.0, 0.5);
*p++ = (((int)floor(rgb[0] * 255 + 0.5) << 16) | ((int)floor(rgb[1] * 255 + 0.5) << 8)
| (int)floor(rgb[2] * 255 + 0.5));
}
}
cairo_surface_t *source
= cairo_image_surface_create_for_data((unsigned char *)buf, CAIRO_FORMAT_RGB24, width, height, stride);
cairo_set_source_surface(cr, source, 0.0, 0.0);
cairo_paint(cr);
free(buf);
// draw border
float line_width = 1;
cairo_set_line_width(cr, line_width);
cairo_set_source_rgb(cr, flt_bg, flt_bg, flt_bg);
cairo_new_path(cr);
cairo_arc(cr, center_x, center_y, r_outside, 0.0, 2.0 * M_PI);
cairo_stroke(cr);
cairo_arc(cr, center_x, center_y, r_inside, 0.0, 2.0 * M_PI);
cairo_stroke(cr);
cairo_set_source_rgb(cr, flt_dark, flt_dark, flt_dark);
cairo_new_path(cr);
cairo_arc(cr, center_x, center_y, r_outside, M_PI, 1.5 * M_PI);
cairo_stroke(cr);
cairo_arc(cr, center_x, center_y, r_inside, 0.0, 0.5 * M_PI);
cairo_stroke(cr);
cairo_set_source_rgb(cr, flt_light, flt_light, flt_light);
cairo_new_path(cr);
cairo_arc(cr, center_x, center_y, r_outside, 0.0, 0.5 * M_PI);
cairo_stroke(cr);
cairo_arc(cr, center_x, center_y, r_inside, M_PI, 1.5 * M_PI);
cairo_stroke(cr);
// draw selector
double r = 255 / 255.0, g = 155 / 255.0, b = 40 / 255.0;
double h, s, v;
gtk_rgb_to_hsv(r, g, b, &h, &s, &v);
cairo_save(cr);
cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.7);
cairo_translate(cr, center_x, center_y);
cairo_rotate(cr, h * 2.0 * M_PI - M_PI_2);
cairo_arc(cr, r_inside * v, 0.0, 3.0, 0, 2.0 * M_PI);
cairo_stroke(cr);
cairo_restore(cr);
cairo_surface_destroy(source);
return TRUE;
}
