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gimp/plug-ins/compose/compose.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* Compose plug-in (C) 1997 Peter Kirchgessner
* e-mail: pkirchg@aol.com, WWW: http://members.aol.com/pkirchg
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
* This plug-in composes RGB-images from several types of channels
*/
/* Event history:
* V 1.00, PK, 29-Jul-97, Creation
* V 1.01, nn, 20-Dec-97, Add default case in switch for hsv_to_rgb ()
*/
static char ident[] = "@(#) GIMP Compose plug-in v1.01 20-Dec-97";
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "gtk/gtk.h"
#include "libgimp/gimp.h"
#include "libgimp/gimpmenu.h"
/* Declare local functions
*/
static void query (void);
static void run (char *name,
int nparams,
GParam *param,
int *nreturn_vals,
GParam **return_vals);
static gint32 compose (char *compose_type,
gint32 *compose_ID);
static gint32 create_new_image (char *filename, guint width, guint height,
GDrawableType gdtype, gint32 *layer_ID, GDrawable **drawable,
GPixelRgn *pixel_rgn);
static int cmp_icase (char *s1, char *s2);
static void compose_rgb (unsigned char **src, int numpix,
unsigned char *dst);
static void compose_rgba (unsigned char **src, int numpix,
unsigned char *dst);
static void compose_hsv (unsigned char **src, int numpix,
unsigned char *dst);
static void compose_cmy (unsigned char **src, int numpix,
unsigned char *dst);
static void compose_cmyk (unsigned char **src, int numpix,
unsigned char *dst);
static void hsv_to_rgb (unsigned char *h, unsigned char *s,
unsigned char *v, unsigned char *rgb);
static gint compose_dialog (char *compose_type,
gint32 image_ID);
static gint check_gray (gint32 image_id,
gint32 drawable_id,
gpointer data);
static void image_menu_callback (gint32 id,
gpointer data);
static void compose_close_callback (GtkWidget *widget,
gpointer data);
static void compose_ok_callback (GtkWidget *widget,
gpointer data);
static void compose_type_toggle_update (GtkWidget *widget,
gpointer data);
/* Maximum number of images to compose */
#define MAX_COMPOSE_IMAGES 4
/* Description of a composition */
typedef struct {
char *compose_type; /* Type of composition ("RGB", "RGBA",...) */
int num_images; /* Number of input images needed */
char *channel_name[MAX_COMPOSE_IMAGES]; /* channel names for dialog */
char *filename; /* Name of new image */
/* Compose functon */
void (*compose_fun)(unsigned char **src, int numpix, unsigned char *dst);
} COMPOSE_DSC;
/* Array of available compositions. */
static COMPOSE_DSC compose_dsc[] = {
{ "RGB", 3, { "Red:", "Green: ", "Blue:", "N/A" },
"rgb-compose", compose_rgb },
{ "RGBA", 4, { "Red:", "Green: ", "Blue:", "Alpha:" },
"rgba-compose", compose_rgba },
{ "HSV", 3, { "Hue:", "Saturation:", "Value:", "N/A" },
"hsv-compose", compose_hsv },
{ "CMY", 3, { "Cyan:", "Magenta: ", "Yellow:", "N/A" },
"cmy-compose", compose_cmy },
{ "CMYK", 4, { "Cyan:", "Magenta: ", "Yellow:", "Black:" },
"cmyk-compose", compose_cmyk }
};
#define MAX_COMPOSE_TYPES (sizeof (compose_dsc) / sizeof (compose_dsc[0]))
typedef struct {
gint32 compose_ID[MAX_COMPOSE_IMAGES]; /* Image IDs of input images */
char compose_type[32]; /* type of composition */
} ComposeVals;
/* Dialog structure */
typedef struct {
GtkWidget *channel_label[MAX_COMPOSE_IMAGES]; /* The labels to change */
gint32 select_ID[MAX_COMPOSE_IMAGES]; /* Image Ids selected by menu */
gint compose_flag[MAX_COMPOSE_TYPES]; /* toggle data of compose type */
gint run;
} ComposeInterface;
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static ComposeVals composevals =
{
{ 0 }, /* Image IDs of images to compose */
"rgb" /* Type of composition */
};
static ComposeInterface composeint =
{
{ NULL }, /* Label Widgets */
{ 0 }, /* Image IDs from menues */
{ 0 }, /* Compose type toggle flags */
FALSE /* run */
};
static GRunModeType run_mode;
MAIN ()
static void
query ()
{
static GParamDef args[] =
{
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_IMAGE, "image", "First input image" },
{ PARAM_DRAWABLE, "drawable", "Input drawable (not used)" },
{ PARAM_IMAGE, "image", "Second input image" },
{ PARAM_IMAGE, "image", "Third input image" },
{ PARAM_IMAGE, "image", "Fourth input image" },
{ PARAM_STRING, "compose_type", "What to compose: RGB, RGBA, HSV,\
CMY, CMYK" }
};
static GParamDef return_vals[] =
{
{ PARAM_IMAGE, "new_image", "Output image" }
};
static int nargs = sizeof (args) / sizeof (args[0]);
static int nreturn_vals = sizeof (return_vals) / sizeof (return_vals[0]);
gimp_install_procedure ("plug_in_compose",
"Compose an image from different types of channels",
"This function creates a new image from\
different channel informations kept in gray images",
"Peter Kirchgessner",
"Peter Kirchgessner (pkirchg@aol.com)",
"1997",
"<Image>/Image/Channel Ops/Compose",
"GRAY",
PROC_PLUG_IN,
nargs, nreturn_vals,
args, return_vals);
}
static void
run (char *name,
int nparams,
GParam *param,
int *nreturn_vals,
GParam **return_vals)
{
static GParam values[2];
GStatusType status = STATUS_SUCCESS;
gint32 image_ID;
run_mode = param[0].data.d_int32;
*nreturn_vals = 2;
*return_vals = values;
values[0].type = PARAM_STATUS;
values[0].data.d_status = status;
values[1].type = PARAM_IMAGE;
values[1].data.d_int32 = -1;
switch (run_mode)
{
case RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data ("plug_in_compose", &composevals);
/* First acquire information with a dialog */
if (! compose_dialog (composevals.compose_type, param[1].data.d_int32))
return;
break;
case RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 7)
status = STATUS_CALLING_ERROR;
if (status == STATUS_SUCCESS)
{
composevals.compose_ID[0] = param[1].data.d_int32;
composevals.compose_ID[1] = param[3].data.d_int32;
composevals.compose_ID[2] = param[4].data.d_int32;
composevals.compose_ID[3] = param[5].data.d_int32;
strncpy (composevals.compose_type, param[6].data.d_string,
sizeof (composevals.compose_type));
composevals.compose_type[sizeof (composevals.compose_type)-1] = '\0';
}
break;
case RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data ("plug_in_compose", &composevals);
break;
default:
break;
}
if (status == STATUS_SUCCESS)
{
if (run_mode != RUN_NONINTERACTIVE)
gimp_progress_init ("Composing...");
image_ID = compose (composevals.compose_type, composevals.compose_ID);
if (image_ID <= 0)
{
status = STATUS_EXECUTION_ERROR;
}
else
{
values[1].data.d_int32 = image_ID;
gimp_image_enable_undo (image_ID);
gimp_image_clean_all (image_ID);
if (run_mode != RUN_NONINTERACTIVE)
gimp_display_new (image_ID);
}
/* Store data */
if (run_mode == RUN_INTERACTIVE)
gimp_set_data ("plug_in_compose", &composevals, sizeof (ComposeVals));
}
values[0].data.d_status = status;
}
/* Compose an image from several gray-images */
static gint32
compose (char *compose_type,
gint32 *compose_ID)
{int width, height, tile_height, scan_lines;
int num_images, compose_idx;
int i, j;
gint num_layers;
gint32 *g32, layer_ID_src[MAX_COMPOSE_IMAGES], layer_ID_dst, image_ID_dst;
unsigned char *src[MAX_COMPOSE_IMAGES], *dst = (unsigned char *)ident;
GDrawableType gdtype_dst;
GDrawable *drawable_src[MAX_COMPOSE_IMAGES], *drawable_dst;
GPixelRgn pixel_rgn_src[MAX_COMPOSE_IMAGES], pixel_rgn_dst;
/* Search type of composing */
compose_idx = -1;
for (j = 0; j < MAX_COMPOSE_TYPES; j++)
{
if (cmp_icase (compose_type, compose_dsc[j].compose_type) == 0)
compose_idx = j;
}
if (compose_idx < 0)
return (-1);
num_images = compose_dsc[compose_idx].num_images;
/* Check image sizes */
width = gimp_image_width (compose_ID[0]);
height = gimp_image_height (compose_ID[0]);
tile_height = gimp_tile_height ();
for (j = 1; j < num_images; j++)
{
if ( (width != (int)gimp_image_width (compose_ID[j]))
|| (height != (int)gimp_image_height (compose_ID[j])))
{
printf ("compose: images have different size\n");
return -1;
}
}
/* Get first layer/drawable/pixel region for all input images */
for (j = 0; j < num_images; j++)
{
/* Get first layer of image */
g32 = gimp_image_get_layers (compose_ID[j], &num_layers);
if ((g32 == NULL) || (num_layers <= 0))
{
printf ("compose: error in getting layer IDs\n");
return (-1);
}
layer_ID_src[j] = g32[0];
/* Get drawable for layer */
drawable_src[j] = gimp_drawable_get (layer_ID_src[j]);
if (drawable_src[j]->bpp != 1)
{
printf ("compose: image is not a gray image\n");
return (-1);
}
/* Get pixel region */
gimp_pixel_rgn_init (&(pixel_rgn_src[j]), drawable_src[j], 0, 0,
width, height, FALSE, FALSE);
/* Get memory for retrieving information */
src[j] = (unsigned char *)g_malloc (tile_height * width
* drawable_src[j]->bpp);
if (src[j] == NULL)
{
printf ("compose: not enough memory\n");
return (-1);
}
}
/* Create new image */
gdtype_dst = (compose_dsc[compose_idx].compose_fun == compose_rgba)
? RGBA_IMAGE : RGB_IMAGE;
image_ID_dst = create_new_image (compose_dsc[compose_idx].filename,
width, height, gdtype_dst,
&layer_ID_dst, &drawable_dst, &pixel_rgn_dst);
dst = (unsigned char *)g_malloc (tile_height * width * drawable_dst->bpp);
if (dst == NULL)
{
for (j = 0; j < num_images; j++) g_free (src[j]);
printf ("compose: not enough memory\n");
return (-1);
}
/* Do the composition */
i = 0;
while (i < height)
{
scan_lines = (i+tile_height-1 < height) ? tile_height : (height-i);
/* Get source pixel regions */
for (j = 0; j < num_images; j++)
gimp_pixel_rgn_get_rect (&(pixel_rgn_src[j]), src[j], 0, i,
width, scan_lines);
/* Do the composition */
compose_dsc[compose_idx].compose_fun (src, width*tile_height, dst);
/* Set destination pixel region */
gimp_pixel_rgn_set_rect (&pixel_rgn_dst, dst, 0, i, width, scan_lines);
i += scan_lines;
if (run_mode != RUN_NONINTERACTIVE)
gimp_progress_update (((double)i) / (double)height);
}
for (j = 0; j < num_images; j++)
{
g_free (src[j]);
gimp_drawable_flush (drawable_src[j]);
gimp_drawable_detach (drawable_src[j]);
}
g_free (dst);
gimp_drawable_flush (drawable_dst);
gimp_drawable_detach (drawable_dst);
return image_ID_dst;
}
/* Create an image. Sets layer_ID, drawable and rgn. Returns image_ID */
static gint32
create_new_image (char *filename,
guint width,
guint height,
GDrawableType gdtype,
gint32 *layer_ID,
GDrawable **drawable,
GPixelRgn *pixel_rgn)
{gint32 image_ID;
GImageType gitype;
if ((gdtype == GRAY_IMAGE) || (gdtype == GRAYA_IMAGE))
gitype = GRAY;
else if ((gdtype == INDEXED_IMAGE) || (gdtype == INDEXEDA_IMAGE))
gitype = INDEXED;
else
gitype = RGB;
image_ID = gimp_image_new (width, height, gitype);
gimp_image_set_filename (image_ID, filename);
*layer_ID = gimp_layer_new (image_ID, "Background", width, height,
gdtype, 100, NORMAL_MODE);
gimp_image_add_layer (image_ID, *layer_ID, 0);
*drawable = gimp_drawable_get (*layer_ID);
gimp_pixel_rgn_init (pixel_rgn, *drawable, 0, 0, (*drawable)->width,
(*drawable)->height, TRUE, FALSE);
return (image_ID);
}
/* Compare two strings ignoring case (could also be done by strcasecmp() */
/* but is it available everywhere ?) */
static int cmp_icase (char *s1, char *s2)
{int c1, c2;
c1 = toupper (*s1); c2 = toupper (*s2);
while (*s1 && *s2)
{
if (c1 != c2) return (c2 - c1);
c1 = toupper (*(++s1)); c2 = toupper (*(++s2));
}
return (c2 - c1);
}
static void
compose_rgb (unsigned char **src,
int numpix,
unsigned char *dst)
{register unsigned char *red_src = src[0];
register unsigned char *green_src = src[1];
register unsigned char *blue_src = src[2];
register unsigned char *rgb_dst = dst;
register int count = numpix;
while (count-- > 0)
{
*(rgb_dst++) = *(red_src++);
*(rgb_dst++) = *(green_src++);
*(rgb_dst++) = *(blue_src++);
}
}
static void
compose_rgba (unsigned char **src,
int numpix,
unsigned char *dst)
{register unsigned char *red_src = src[0];
register unsigned char *green_src = src[1];
register unsigned char *blue_src = src[2];
register unsigned char *alpha_src = src[3];
register unsigned char *rgb_dst = dst;
register int count = numpix;
while (count-- > 0)
{
*(rgb_dst++) = *(red_src++);
*(rgb_dst++) = *(green_src++);
*(rgb_dst++) = *(blue_src++);
*(rgb_dst++) = *(alpha_src++);
}
}
static void
compose_hsv (unsigned char **src,
int numpix,
unsigned char *dst)
{register unsigned char *hue_src = src[0];
register unsigned char *sat_src = src[1];
register unsigned char *val_src = src[2];
register unsigned char *rgb_dst = dst;
register int count = numpix;
while (count-- > 0)
{
hsv_to_rgb (hue_src++, sat_src++, val_src++, rgb_dst);
rgb_dst += 3;
}
}
static void
compose_cmy (unsigned char **src,
int numpix,
unsigned char *dst)
{register unsigned char *cyan_src = src[0];
register unsigned char *magenta_src = src[1];
register unsigned char *yellow_src = src[2];
register unsigned char *rgb_dst = dst;
register int count = numpix;
while (count-- > 0)
{
*(rgb_dst++) = 255 - *(cyan_src++);
*(rgb_dst++) = 255 - *(magenta_src++);
*(rgb_dst++) = 255 - *(yellow_src++);
}
}
static void
compose_cmyk (unsigned char **src,
int numpix,
unsigned char *dst)
{register unsigned char *cyan_src = src[0];
register unsigned char *magenta_src = src[1];
register unsigned char *yellow_src = src[2];
register unsigned char *black_src = src[3];
register unsigned char *rgb_dst = dst;
register int count = numpix;
int cyan, magenta, yellow, black;
while (count-- > 0)
{
black = (int)*(black_src++);
if (black)
{
cyan = (int)*(cyan_src++);
magenta = (int)*(magenta_src++);
yellow = (int)*(yellow_src++);
cyan += black; if (cyan > 255) cyan = 255;
magenta += black; if (magenta > 255) magenta = 255;
yellow += black; if (yellow > 255) yellow = 255;
*(rgb_dst++) = 255 - cyan;
*(rgb_dst++) = 255 - magenta;
*(rgb_dst++) = 255 - yellow;
}
else
{
*(rgb_dst++) = 255 - *(cyan_src++);
*(rgb_dst++) = 255 - *(magenta_src++);
*(rgb_dst++) = 255 - *(yellow_src++);
}
}
}
static gint
compose_dialog (char *compose_type,
gint32 image_ID)
{
GtkWidget *dlg;
GtkWidget *button;
GtkWidget *toggle;
GtkWidget *left_frame, *right_frame;
GtkWidget *left_vbox, *right_vbox;
GtkWidget *hbox;
GtkWidget *label;
GtkWidget *table;
GtkWidget *image_option_menu, *image_menu;
GSList *group;
gchar **argv;
gint argc;
int j, compose_idx;
/* Check default compose type */
compose_idx = -1;
for (j = 0; j < MAX_COMPOSE_TYPES; j++)
{
if (cmp_icase (compose_type, compose_dsc[j].compose_type) == 0)
compose_idx = j;
}
if (compose_idx < 0) compose_idx = 0;
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("Compose");
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
dlg = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (dlg), "Compose");
gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
(GtkSignalFunc) compose_close_callback,
NULL);
/* Action area */
button = gtk_button_new_with_label ("OK");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) compose_ok_callback, dlg);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->action_area), button,
TRUE, TRUE, 0);
gtk_widget_grab_default (button);
gtk_widget_show (button);
button = gtk_button_new_with_label ("Cancel");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) gtk_widget_destroy,
GTK_OBJECT (dlg));
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->action_area), button,
TRUE, TRUE, 0);
gtk_widget_show (button);
/* parameter settings */
hbox = gtk_hbox_new (FALSE, 0);
gtk_container_border_width (GTK_CONTAINER (hbox), 0);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), hbox, TRUE, TRUE, 0);
gtk_widget_show (hbox);
/* The left frame keeps the compose type toggles */
left_frame = gtk_frame_new ("Compose channels:");
gtk_frame_set_shadow_type (GTK_FRAME (left_frame), GTK_SHADOW_ETCHED_IN);
gtk_container_border_width (GTK_CONTAINER (left_frame), 10);
gtk_box_pack_start (GTK_BOX (hbox), left_frame, TRUE, TRUE, 0);
left_vbox = gtk_vbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (left_vbox), 10);
gtk_container_add (GTK_CONTAINER (left_frame), left_vbox);
/* The right frame keeps the selection menues for images. */
/* Because the labels within this frame will change when a toggle */
/* in the left frame is changed, fill in the right part first. */
/* Otherwise it can occur, that a non-existing label might be changed. */
right_frame = gtk_frame_new ("Channel representations:");
gtk_frame_set_shadow_type (GTK_FRAME (right_frame), GTK_SHADOW_ETCHED_IN);
gtk_container_border_width (GTK_CONTAINER (right_frame), 10);
gtk_box_pack_start (GTK_BOX (hbox), right_frame, TRUE, TRUE, 0);
right_vbox = gtk_vbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (right_vbox), 10);
gtk_container_add (GTK_CONTAINER (right_frame), right_vbox);
table = gtk_table_new (MAX_COMPOSE_IMAGES, 3, FALSE);
gtk_table_set_row_spacings (GTK_TABLE (table), 5);
gtk_table_set_col_spacings (GTK_TABLE (table), 5);
gtk_box_pack_start (GTK_BOX (right_vbox), table, TRUE, TRUE, 0);
gtk_widget_show (table);
/* Channel names */
for (j = 0; j < MAX_COMPOSE_IMAGES; j++)
{
composeint.channel_label[j] = label =
gtk_label_new (compose_dsc[compose_idx].channel_name[j]);
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 1, 2, j, j+1,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (label);
}
/* Menues to select images */
for (j = 0; j < MAX_COMPOSE_IMAGES; j++)
{
composeint.select_ID[j] = image_ID;
image_option_menu = gtk_option_menu_new ();
image_menu = gimp_image_menu_new (check_gray, image_menu_callback,
&(composeint.select_ID[j]), composeint.select_ID[j]);
gtk_table_attach (GTK_TABLE (table), image_option_menu, 2, 3, j, j+1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (image_option_menu);
gtk_option_menu_set_menu (GTK_OPTION_MENU (image_option_menu), image_menu);
}
/* Compose types */
group = NULL;
for (j = 0; j < MAX_COMPOSE_TYPES; j++)
{
toggle = gtk_radio_button_new_with_label (group,
compose_dsc[j].compose_type);
group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (left_vbox), toggle, TRUE, TRUE, 0);
composeint.compose_flag[j] = (j == compose_idx);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) compose_type_toggle_update,
&(composeint.compose_flag[j]));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
composeint.compose_flag[j]);
gtk_widget_show (toggle);
}
gtk_widget_show (left_vbox);
gtk_widget_show (right_vbox);
gtk_widget_show (left_frame);
gtk_widget_show (right_frame);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return composeint.run;
}
/* hsv_to_rgb has been taken from the compose-plug-in of GIMP V 0.54
* and hass been modified a little bit
*/
static void
hsv_to_rgb (unsigned char *h,
unsigned char *s,
unsigned char *v,
unsigned char *rgb)
{double hue, sat, val;
double f, p, q, t;
int red, green, blue;
if (*s == 0)
{
rgb[0] = rgb[1] = rgb[2] = *v;
}
else
{
hue = *h * 6.0 / 255.0;
sat = *s / 255.0;
val = *v / 255.0;
f = hue - (int) hue;
p = val * (1.0 - sat);
q = val * (1.0 - (sat * f));
t = val * (1.0 - (sat * (1.0 - f)));
switch ((int) hue)
{
case 0:
red = (int)(val * 255.0);
green = (int)(t * 255.0);
blue = (int)(p * 255.0);
break;
case 1:
red = (int)(q * 255.0);
green = (int)(val * 255.0);
blue = (int)(p * 255.0);
break;
case 2:
red = (int)(p * 255.0);
green = (int)(val * 255.0);
blue = (int)(t * 255.0);
break;
case 3:
red = (int)(p * 255.0);
green = (int)(q * 255.0);
blue = (int)(val * 255.0);
break;
case 4:
red = (int)(t * 255.0);
green = (int)(p * 255.0);
blue = (int)(val * 255.0);
break;
case 5:
red = (int)(val * 255.0);
green = (int)(p * 255.0);
blue = (int)(q * 255.0);
break;
default:
red = 0;
green = 0;
blue = 0;
break;
}
if (red < 0) red = 0; else if (red > 255) red = 255;
if (green < 0) green = 0; else if (green > 255) green = 255;
if (blue < 0) blue = 0; else if (blue > 255) blue = 255;
rgb[0] = (unsigned char)red;
rgb[1] = (unsigned char)green;
rgb[2] = (unsigned char)blue;
}
}
/* Compose interface functions */
static gint
check_gray (gint32 image_id,
gint32 drawable_id,
gpointer data)
{
return (gimp_image_base_type (image_id) == GRAY);
}
static void
image_menu_callback (gint32 id,
gpointer data)
{
*(gint32 *)data = id;
}
static void
compose_close_callback (GtkWidget *widget,
gpointer data)
{
gtk_main_quit ();
}
static void
compose_ok_callback (GtkWidget *widget,
gpointer data)
{int j;
composeint.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
for (j = 0; j < MAX_COMPOSE_IMAGES; j++)
composevals.compose_ID[j] = composeint.select_ID[j];
for (j = 0; j < MAX_COMPOSE_TYPES; j++)
{
if (composeint.compose_flag[j])
{
strcpy (composevals.compose_type, compose_dsc[j].compose_type);
break;
}
}
}
static void
compose_type_toggle_update (GtkWidget *widget,
gpointer data)
{
gint *toggle_val;
gint compose_idx, j;
toggle_val = (gint *) data;
if (GTK_TOGGLE_BUTTON (widget)->active)
{
*toggle_val = TRUE;
compose_idx = toggle_val - &(composeint.compose_flag[0]);
for (j = 0; j < MAX_COMPOSE_IMAGES; j++)
gtk_label_set_text (GTK_LABEL (composeint.channel_label[j]),
compose_dsc[compose_idx].channel_name[j]);
}
else
*toggle_val = FALSE;
}
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