/*
   Raw photo loader plugin for The GIMP
   by Dave Coffin at cybercom dot net, user dcoffin
   http://www.cybercom.net/~dcoffin/

   $Revision: 1.32 $
   $Date: 2008/09/16 05:41:39 $

   This code is licensed under the same terms as The GIMP.
   To simplify maintenance, it calls my command-line "dcraw"
   program to do the actual decoding.

   To install locally:
	gimptool --install rawphoto.c

   To install globally:
	gimptool --install-admin rawphoto.c

   To build without installing:
	gcc -o rawphoto rawphoto.c `gtk-config --cflags --libs` -lgimp -lgimpui
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <gtk/gtk.h>

#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>

#if GIMP_CHECK_VERSION(1,3,2)
#define GimpRunModeType GimpRunMode
#endif

#if GIMP_CHECK_VERSION(1,3,17)
#define RAWPHOTO_CONST const
#else
#define RAWPHOTO_CONST
#endif

#include <locale.h>
#include <libintl.h>
#define _(String) gettext(String)

#define PLUG_IN_VERSION  "1.1.20 - 16 September 2008"

static void query(void);
static void run(RAWPHOTO_CONST gchar *name,
		gint nparams,
		RAWPHOTO_CONST GimpParam *param,
		gint *nreturn_vals,
		GimpParam **return_vals);

static gint  load_dialog (gchar *name);
static gint32 load_image (gchar *filename);

GimpPlugInInfo PLUG_IN_INFO =
{
  NULL,  /* init_procedure */
  NULL,  /* quit_procedure */
  query, /* query_procedure */
  run,   /* run_procedure */
};

static struct {
  gboolean check_val[6];
  gfloat    spin_val[2];
} cfg = {
  { FALSE, FALSE, FALSE, FALSE, FALSE, FALSE },
  { 1, 0 }
};

MAIN ()

static void query (void)
{
  static GimpParamDef load_args[] =
  {
    { GIMP_PDB_INT32,      "run_mode",     "Interactive, non-interactive" },
    { GIMP_PDB_STRING,     "filename",     "The name of the file to load" },
    { GIMP_PDB_STRING,     "raw_filename", "The name of the file to load" },
  };
  static GimpParamDef load_return_vals[] =
  {
    { GIMP_PDB_IMAGE,      "image",        "Output image" },
  };

  static gint num_load_args =
	sizeof load_args / sizeof load_args[0];
  static gint num_load_return_vals =
	sizeof load_return_vals / sizeof load_return_vals[0];

  gimp_install_procedure ("file_rawphoto_load",
			  "Loads raw digital camera files",
			  "This plug-in loads raw digital camera files.",
			  "Dave Coffin at cybercom dot net, user dcoffin",
			  "Copyright 2003-2008 by Dave Coffin",
			  PLUG_IN_VERSION,
			  "<Load>/rawphoto",
			  NULL,
			  GIMP_PLUGIN,
			  num_load_args,
			  num_load_return_vals,
			  load_args,
			  load_return_vals);

  gimp_register_load_handler ("file_rawphoto_load",
    "3fr,arw,bay,bmq,cine,cr2,crw,cs1,dc2,dcr,dng,erf,fff,hdr,ia,jpg,k25,kc2,kdc,mdc,mef,mos,mrw,nef,nrw,orf,pef,pxn,qtk,raf,raw,rdc,rw2,sr2,srf,sti,tif,x3f", "");
}

static void run (RAWPHOTO_CONST gchar *name,
		gint nparams,
		RAWPHOTO_CONST GimpParam *param,
		gint *nreturn_vals,
		GimpParam **return_vals)
{
  static GimpParam values[2];
  GimpRunModeType run_mode;
  GimpPDBStatusType status;
  gint32 image_id = -1;
  gchar *command, *fname;
  int stat;

  *nreturn_vals = 1;
  *return_vals = values;

  status = GIMP_PDB_CALLING_ERROR;
  if (strcmp (name, "file_rawphoto_load")) goto done;

  status = GIMP_PDB_EXECUTION_ERROR;
  fname = param[1].data.d_string;
  command = g_malloc (strlen(fname)+20);
  if (!command) goto done;
/*
   Is the file really a raw photo?  If not, try loading it
   as a regular JPEG or TIFF.
 */
  sprintf (command, "dcraw -i '%s'\n",fname);
  fputs (command, stderr);
  stat = system (command);
  g_free (command);
  if (stat) {
    if (stat > 0x200)
      g_message (_("The \"rawphoto\" plugin won't work because "
	"there is no \"dcraw\" executable in your path."));
    if (!strcasecmp (fname + strlen(fname) - 4, ".jpg"))
      *return_vals = gimp_run_procedure2
	("file_jpeg_load", nreturn_vals, nparams, param);
    else
      *return_vals = gimp_run_procedure2
	("file_tiff_load", nreturn_vals, nparams, param);
    return;
  }
  gimp_get_data ("plug_in_rawphoto", &cfg);
  status = GIMP_PDB_CANCEL;
  run_mode = param[0].data.d_int32;
  if (run_mode == GIMP_RUN_INTERACTIVE)
    if (!load_dialog (param[1].data.d_string)) goto done;

  status = GIMP_PDB_EXECUTION_ERROR;
  image_id = load_image (param[1].data.d_string);
  if (image_id == -1) goto done;

  *nreturn_vals = 2;
  values[1].type = GIMP_PDB_IMAGE;
  values[1].data.d_image = image_id;
  status = GIMP_PDB_SUCCESS;
  gimp_set_data ("plug_in_rawphoto", &cfg, sizeof cfg);

done:
  values[0].type = GIMP_PDB_STATUS;
  values[0].data.d_status = status;
}

static gint32 load_image (gchar *filename)
{
  int		tile_height, depth, width, height, row, nrows;
  FILE		*pfp;
  gint32	image, layer;
  GimpDrawable	*drawable;
  GimpPixelRgn	pixel_region;
  guchar	*pixel;
  char		*command, nl;

  setlocale (LC_NUMERIC, "C");
  command = g_malloc (strlen(filename)+100);
  if (!command) return -1;
  sprintf (command,
	"dcraw -c%s%s%s%s%s%s -b %0.2f -H %d '%s'\n",
	cfg.check_val[0] ? " -q 0":"",
	cfg.check_val[1] ? " -h":"",
	cfg.check_val[2] ? " -f":"",
	cfg.check_val[3] ? " -d":"",
	cfg.check_val[4] ? " -a":"",
	cfg.check_val[5] ? " -w":"",
	cfg.spin_val[0], (int) cfg.spin_val[1],
	filename );
  fputs (command, stderr);
  pfp = popen (command, "r");
  g_free (command);
  if (!pfp) {
    perror ("dcraw");
    return -1;
  }

  if (fscanf (pfp, "P%d %d %d 255%c", &depth, &width, &height, &nl) != 4
	|| (depth-5)/2 ) {
    pclose (pfp);
    g_message ("Not a raw digital camera image.\n");
    return -1;
  }

  depth = depth*2 - 9;
  image = gimp_image_new (width, height, depth == 3 ? GIMP_RGB : GIMP_GRAY);
  if (image == -1) {
    pclose (pfp);
    g_message ("Can't allocate new image.\n");
    return -1;
  }

  gimp_image_set_filename (image, filename);

  /* Create the "background" layer to hold the image... */
  layer = gimp_layer_new (image, "Background", width, height,
			depth == 3 ? GIMP_RGB_IMAGE : GIMP_GRAY_IMAGE,
			100, GIMP_NORMAL_MODE);
  gimp_image_add_layer (image, layer, 0);

  /* Get the drawable and set the pixel region for our load... */
  drawable = gimp_drawable_get (layer);
  gimp_pixel_rgn_init (&pixel_region, drawable, 0, 0, drawable->width,
			drawable->height, TRUE, FALSE);

  /* Temporary buffers... */
  tile_height = gimp_tile_height();
  pixel = g_new (guchar, tile_height * width * depth);

  /* Load the image... */
  for (row = 0; row < height; row += tile_height) {
    nrows = height - row;
    if (nrows > tile_height)
	nrows = tile_height;
    fread (pixel, width * depth, nrows, pfp);
    gimp_pixel_rgn_set_rect (&pixel_region, pixel, 0, row, width, nrows);
  }

  pclose (pfp);
  g_free (pixel);

  gimp_drawable_flush (drawable);
  gimp_drawable_detach (drawable);

  return image;
}

#if !GIMP_CHECK_VERSION(1,3,23)
/* this is set to true after OK click in any dialog */
gboolean result = FALSE;

static void callback_ok (GtkWidget * widget, gpointer data)
{
  result = TRUE;
  gtk_widget_destroy (GTK_WIDGET (data));
}
#endif

#define NCHECK (sizeof cfg.check_val / sizeof (gboolean))

gint load_dialog (gchar * name)
{
  GtkWidget *dialog;
  GtkWidget *table;
  GtkObject *adj;
  GtkWidget *widget;
  int i;
  static const char *label[9] =
  { "Quick interpolation", "Half-size interpolation",
    "Four color interpolation", "Grayscale document",
    "Automatic white balance", "Camera white balance",
    "Brightness", "Highlight mode" };

  gimp_ui_init ("rawphoto", TRUE);

  dialog = gimp_dialog_new (_("Raw Photo Loader " PLUG_IN_VERSION), "rawphoto",
#if !GIMP_CHECK_VERSION(1,3,23)
			gimp_standard_help_func, "rawphoto",
			GTK_WIN_POS_MOUSE,
			FALSE, TRUE, FALSE,
			_("OK"), callback_ok, NULL, NULL, NULL, TRUE,
			FALSE, _("Cancel"), gtk_widget_destroy, NULL,
			1, NULL, FALSE, TRUE, NULL);
  gtk_signal_connect
	(GTK_OBJECT(dialog), "destroy", GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
#else
			NULL, 0,
			gimp_standard_help_func, "rawphoto",
			GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
			GTK_STOCK_OK,     GTK_RESPONSE_OK,
			NULL);
#endif

  table = gtk_table_new (9, 2, FALSE);
  gtk_container_set_border_width (GTK_CONTAINER(table), 6);
  gtk_box_pack_start
	(GTK_BOX(GTK_DIALOG(dialog)->vbox), table, FALSE, FALSE, 0);
  gtk_widget_show (table);

  for (i=0; i < NCHECK; i++) {
    widget = gtk_check_button_new_with_label
	(_(label[i]));
    gtk_toggle_button_set_active
	(GTK_TOGGLE_BUTTON (widget), cfg.check_val[i]);
    gtk_table_attach
	(GTK_TABLE(table), widget, 0, 2, i, i+1, GTK_FILL, GTK_FILL, 0, 0);
    gtk_signal_connect (GTK_OBJECT (widget), "toggled",
			GTK_SIGNAL_FUNC (gimp_toggle_button_update),
			&cfg.check_val[i]);
    gtk_widget_show (widget);
  }

  for (i=NCHECK; i < NCHECK+2; i++) {
    widget = gtk_label_new (_(label[i]));
    gtk_misc_set_alignment (GTK_MISC (widget), 1.0, 0.5);
    gtk_misc_set_padding   (GTK_MISC (widget), 10, 0);
    gtk_table_attach
	(GTK_TABLE(table), widget, 0, 1, i, i+1, GTK_FILL, GTK_FILL, 0, 0);
    gtk_widget_show (widget);
    if (i == NCHECK+1)
      widget = gimp_spin_button_new
	(&adj, cfg.spin_val[i-NCHECK], 0, 9, 1, 9, 1, 1, 0);
    else
      widget = gimp_spin_button_new
	(&adj, cfg.spin_val[i-NCHECK], 0.01, 4.0, 0.01, 0.1, 0.1, 0.1, 2);
    gtk_table_attach
	(GTK_TABLE(table), widget, 1, 2, i, i+1, GTK_FILL, GTK_FILL, 0, 0);
    gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
			GTK_SIGNAL_FUNC (gimp_float_adjustment_update),
			&cfg.spin_val[i-NCHECK]);
    gtk_widget_show (widget);
  }

  gtk_widget_show (dialog);

#if !GIMP_CHECK_VERSION(1,3,23)
  gtk_main();
  gdk_flush();

  return result;
#else
  i = gimp_dialog_run (GIMP_DIALOG (dialog));
  gtk_widget_destroy (dialog);
  return i == GTK_RESPONSE_OK;
#endif
}