static void
color_rotate_row (const guchar *src_row,
guchar *dest_row,
gint row,
gint row_width,
gint bytes)
{
gint col, bytenum;
gdouble H, S, V;
guchar rgb[3];
for (col = 0; col < row_width; col++)
{
gboolean skip = FALSE;
rgb[0] = src_row[col * bytes + 0];
rgb[1] = src_row[col * bytes + 1];
rgb[2] = src_row[col * bytes + 2];
gimp_rgb_to_hsv4 (rgb, &H, &S, &V);
if (rcm_is_gray (S))
{
if (Current.Gray_to_from == GRAY_FROM)
{
if (rcm_angle_inside_slice (Current.Gray->hue,
Current.From->angle) <= 1)
{
H = Current.Gray->hue / TP;
S = Current.Gray->satur;
}
else
{
skip = TRUE;
}
}
else
{
skip = TRUE;
gimp_hsv_to_rgb4 (rgb, Current.Gray->hue / TP,
Current.Gray->satur, V);
}
}
if (! skip)
{
H = rcm_linear (rcm_left_end (Current.From->angle),
rcm_right_end (Current.From->angle),
rcm_left_end (Current.To->angle),
rcm_right_end (Current.To->angle),
H * TP);
H = angle_mod_2PI (H) / TP;
gimp_hsv_to_rgb4 (rgb, H, S, V);
}
dest_row[col * bytes + 0] = rgb[0];
dest_row[col * bytes + 1] = rgb[1];
dest_row[col * bytes + 2] = rgb[2];
if (bytes > 3)
{
for (bytenum = 3; bytenum < bytes; bytenum++)
dest_row[col * bytes + bytenum] = src_row[col * bytes + bytenum];
}
}
}
/* render before/after preview */
void
rcm_render_preview (GtkWidget *preview)
{
ReducedImage *reduced;
gint version;
gint RW, RH, bytes, i, j;
guchar *a;
guchar *rgb_array;
gdouble *hsv_array;
gfloat degree;
g_return_if_fail (preview != NULL);
version = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (preview), "mode"));
reduced = Current_c.reduced;
RW = reduced->width;
RH = reduced->height;
bytes = Current_c.drawable->bpp;
hsv_array = reduced->hsv;
rgb_array = reduced->rgb;
a = g_new (guchar, 4 * RW * RH);
if (version == CURRENT)
{
gdouble H, S, V;
guchar rgb[3];
for (i = 0; i < RH; i++)
{
for (j = 0; j < RW; j++)
{
gboolean unchanged = FALSE;
gboolean skip = FALSE;
H = hsv_array[i*RW*bytes + j*bytes + 0];
S = hsv_array[i*RW*bytes + j*bytes + 1];
V = hsv_array[i*RW*bytes + j*bytes + 2];
if (rcm_is_gray(S) && (reduced->mask[i*RW+j] != 0))
{
switch (Current_c.Gray_to_from)
{
case GRAY_FROM:
if (rcm_angle_inside_slice (Current_c.Gray->hue,
Current_c.From->angle) <= 1)
{
H = Current_c.Gray->hue/TP;
S = Current_c.Gray->satur;
}
else
skip = TRUE;
break;
case GRAY_TO:
unchanged = FALSE;
skip = TRUE;
gimp_hsv_to_rgb4 (rgb,
Current_c.Gray->hue/TP,
Current_c.Gray->satur,
V);
break;
default:
break;
}
}
if (!skip)
{
unchanged = FALSE;
H = rcm_linear (rcm_left_end (Current_c.From->angle),
rcm_right_end (Current_c.From->angle),
rcm_left_end (Current_c.To->angle),
rcm_right_end (Current_c.To->angle),
H * TP);
H = angle_mod_2PI(H) / TP;
gimp_hsv_to_rgb4 (rgb, H,S,V);
}
if (unchanged)
degree = 0;
else
degree = reduced->mask[i*RW+j] / 255.0;
a[(i*RW+j)*4+0] = (1-degree) * rgb_array[i*RW*bytes + j*bytes + 0] + degree * rgb[0];
a[(i*RW+j)*4+1] = (1-degree) * rgb_array[i*RW*bytes + j*bytes + 1] + degree * rgb[1];
a[(i*RW+j)*4+2] = (1-degree) * rgb_array[i*RW*bytes + j*bytes + 2] + degree * rgb[2];
/* apply transparency */
if (bytes == 4)
a[(i*RW+j)*4+3] = rgb_array[i*RW*bytes+j*bytes+3];
else
a[(i*RW+j)*4+3] = 255;
}
}
}
else /* ORIGINAL */
{
for (i = 0; i < RH; i++)
{
for (j = 0; j < RW; j++)
{
a[(i*RW+j)*4+0] = rgb_array[i*RW*bytes + j*bytes + 0];
a[(i*RW+j)*4+1] = rgb_array[i*RW*bytes + j*bytes + 1];
a[(i*RW+j)*4+2] = rgb_array[i*RW*bytes + j*bytes + 2];
if (bytes == 4)
a[(i*RW+j)*4+3] = rgb_array[i*RW*bytes+j*bytes+3];
else
a[(i*RW+j)*4+3] = 255;
}
}
}
gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview),
0, 0, RW, RH,
GIMP_RGBA_IMAGE,
a,
RW * 4);
g_free (a);
}