COLORREF HSBtoCR( SHSB hsb )
{
return RGBtoCR( HSBtoRGB( hsb ) );
}
JColor JColor::getHSBJColor(float h, float s, float b) {
return JColor(HSBtoRGB(h, s, b));
}
///////////////////////////////////////////////////////////////////////////////
// HSB --> RGB
///////////////////////////////////////////////////////////////////////////////
Color HSBtoRGB (unsigned long hsb)
{
return HSBtoRGB (GetHValue (hsb), GetSValue (hsb), GetVValue (hsb));
}
static void dofilter (GimpDrawable *drawable)
{
gint i, j, k, channels;
gint x1, y1, x2, y2;
GimpPixelRgn rgn_in, rgn_out;
guchar *inrow;
guchar *outrow;
/* Gets upper left and lower right coordinates,
* and layers number in the image */
gimp_drawable_mask_bounds (drawable->drawable_id,
&x1, &y1, &x2, &y2);
channels = gimp_drawable_bpp (drawable->drawable_id);
/* Initialises two PixelRgns, one to read original data,
* and the other to write output data. That second one will
* be merged at the end by the call to
* gimp_drawable_merge_shadow() */
gimp_pixel_rgn_init (&rgn_in, drawable,
x1, y1, x2 - x1, y2 - y1, FALSE, FALSE);
gimp_pixel_rgn_init (&rgn_out, drawable,
x1, y1, x2 - x1, y2 - y1, TRUE, TRUE);
/* Initialise enough memory for inrow, outrow */
inrow = g_new (guchar, channels * (x2 - x1));
outrow = g_new (guchar, channels * (x2 - x1));
/* EXAMPLE USAGE of the functions to get the range */
// guchar minp[4],maxp[4];
// getrange(drawable, minp, maxp, x1, x2, y1, y2);
for (i = y1; i < y2; i++)
{
/* Get row i into inrow array*/
gimp_pixel_rgn_get_row (&rgn_in, inrow, x1, i, x2 - x1);
for (j = x1; j < x2; j++)
{
/* For each layer get the color
* pixels */
guchar rgb[4];
for (k = 0; k < 4; k++)
{
if (k<channels)
rgb[k] = inrow[channels * (j - x1) + k];
else rgb[k] = 0;
}
/* YOUR MAIN CODE HERE : should modify the values inside the rgb array*/
/* EXAMPLE OF CODE : */
float h,s,b;
RGBtoHSB (rgb,&h,&s,&b);
h=180.0f*(1.0f + cos(h * M_2_PI / 360.0f));
HSBtoRGB(h,s,b,rgb);
/* END OF YOUR MAIN CODE HERE */
/* write the new rgb values to the pixels of the outrow */
for (k = 0; k < channels; k++){
outrow[channels * (j - x1) + k] = rgb[k];
}
} /*end for j each pixel of the row*/
gimp_pixel_rgn_set_row (&rgn_out, outrow, x1, i, x2 - x1);
if (i % 10 == 0)
gimp_progress_update ((gdouble) (i - x1) / (gdouble) (x2 - x1));
} /*end for i each row*/
g_free (inrow);
g_free (outrow);
/* Update the modified region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, x2 - x1, y2 - y1);
}
int RandomColor::generate( int h, const ColorInfo& info, Luminosity luminosity )
{
const int s = pickSaturation(info, luminosity);
const int b = pickBrightness(s, info, luminosity);
return HSBtoRGB(h, s, b);
}
