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gimp/plug-ins/common/channel_mixer.c

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/****************************************************************************
* This is a plugin for the GIMP v 2.0 or later.
*
* Copyright (C) 2002 Martin Guldahl <mguldahl@xmission.com>
* Based on GTK code from:
* homomorphic (Copyright (C) 2001 Valter Marcus Hilden)
* rand-noted (Copyright (C) 1998 Miles O'Neal)
* nlfilt (Copyright (C) 1997 Eric L. Hernes)
* pagecurl (Copyright (C) 1996 Federico Mena Quintero)
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
****************************************************************************/
#include "config.h"
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <gtk/gtk.h>
#ifdef G_OS_WIN32
#include <libgimpbase/gimpwin32-io.h>
#endif
#include <libgimpmath/gimpmath.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_NAME "plug_in_colors_channel_mixer"
#define PLUG_IN_VERSION "Channel Mixer 0.8"
#define HELP_ID "plug-in-colors-channel-mixer"
#define PROGRESS_UPDATE_NUM 20
#define CM_LINE_SIZE 1024
typedef enum
{
CM_RED_CHANNEL,
CM_GREEN_CHANNEL,
CM_BLUE_CHANNEL
} CmModeType;
typedef struct
{
gdouble red_gain;
gdouble green_gain;
gdouble blue_gain;
} CmChannelType;
typedef struct
{
CmChannelType red;
CmChannelType green;
CmChannelType blue;
CmChannelType black;
gboolean monochrome_flag;
gboolean preserve_luminosity_flag;
CmModeType output_channel;
gboolean preview;
GtkAdjustment *red_data;
GtkAdjustment *green_data;
GtkAdjustment *blue_data;
GtkWidget *combo;
CmModeType old_output_channel;
GtkWidget *monochrome_toggle;
GtkWidget *preserve_luminosity_toggle;
} CmParamsType;
static GtkWidget *preview;
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void channel_mixer (GimpDrawable *drawable);
static gboolean cm_dialog (GimpDrawable *drawable);
static void cm_red_scale_callback (GtkAdjustment *adjustment,
CmParamsType *mix);
static void cm_green_scale_callback (GtkAdjustment *adjustment,
CmParamsType *mix);
static void cm_blue_scale_callback (GtkAdjustment *adjustment,
CmParamsType *mix);
static void cm_monochrome_callback (GtkWidget *widget,
CmParamsType *mix);
static void cm_preserve_luminosity_callback (GtkWidget *widget,
CmParamsType *mix);
static void cm_load_file_callback (GtkWidget *widget,
CmParamsType *mix);
static void cm_load_file_response_callback (GtkWidget *dialog,
gint response_id,
CmParamsType *mix);
static void cm_save_file_callback (GtkWidget *widget,
CmParamsType *mix);
static void cm_save_file_response_callback (GtkWidget *dialog,
gint response_id,
CmParamsType *mix);
static void cm_combo_callback (GtkWidget *widget,
CmParamsType *mix);
static gboolean cm_force_overwrite (const gchar *filename,
GtkWidget *parent);
static gdouble cm_calculate_norm (CmParamsType *mix,
CmChannelType *ch);
static inline guchar cm_mix_pixel (CmChannelType *ch,
guchar r,
guchar g,
guchar b,
gdouble norm);
static void cm_preview (CmParamsType *mix,
GimpPreview *preview);
static void cm_set_adjusters (CmParamsType *mix);
static void cm_save_file (CmParamsType *mix,
FILE *fp);
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run /* run_proc */
};
static CmParamsType mix =
{
{ 1.0, 0.0, 0.0 },
{ 0.0, 1.0, 0.0 },
{ 0.0, 0.0, 1.0 },
{ 1.0, 0.0, 0.0 },
FALSE,
FALSE,
CM_RED_CHANNEL,
NULL
};
MAIN ()
static void
query (void)
{
static GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image (unused)" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_INT32, "monochrome", "Monochrome (TRUE or FALSE)" },
{ GIMP_PDB_FLOAT, "rr_gain", "Set the red gain for the red channel" },
{ GIMP_PDB_FLOAT, "rg_gain", "Set the green gain for the red channel" },
{ GIMP_PDB_FLOAT, "rb_gain", "Set the blue gain for the red channel" },
{ GIMP_PDB_FLOAT, "gr_gain", "Set the red gain for the green channel" },
{ GIMP_PDB_FLOAT, "gg_gain", "Set the green gain for the green channel" },
{ GIMP_PDB_FLOAT, "gb_gain", "Set the blue gain for the green channel" },
{ GIMP_PDB_FLOAT, "br_gain", "Set the red gain for the blue channel" },
{ GIMP_PDB_FLOAT, "bg_gain", "Set the green gain for the blue channel" },
{ GIMP_PDB_FLOAT, "bb_gain", "Set the blue gain for the blue channel" }
};
gimp_install_procedure (PLUG_IN_NAME,
"Mix RGB Channels.",
"This plug-in mixes the RGB channels.",
"Martin Guldahl <mguldahl@xmission.com>",
"Martin Guldahl <mguldahl@xmission.com>",
"2002",
N_("Channel Mi_xer.."),
"RGB*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_NAME,
N_("<Image>/Filters/Colors"));
}
/*----------------------------------------------------------------------
* run() - main routine
*
* This handles the main interaction with the GIMP itself,
* and invokes the routine that actually does the work.
*--------------------------------------------------------------------*/
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpDrawable *drawable;
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
run_mode = param[0].data.d_int32;
INIT_I18N ();
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
drawable = gimp_drawable_get (param[2].data.d_drawable);
if (gimp_drawable_is_rgb (drawable->drawable_id))
{
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
gimp_get_data (PLUG_IN_NAME, &mix);
if (! cm_dialog (drawable))
{
gimp_drawable_detach (drawable);
return;
}
break;
case GIMP_RUN_NONINTERACTIVE:
mix.monochrome_flag = param[3].data.d_int32;
if (mix.monochrome_flag == 1)
{
mix.black.red_gain = param[4].data.d_float;
mix.black.green_gain = param[5].data.d_float;
mix.black.blue_gain = param[6].data.d_float;
}
else
{
mix.red.red_gain = param[4].data.d_float;
mix.red.green_gain = param[5].data.d_float;
mix.red.blue_gain = param[6].data.d_float;
mix.green.red_gain = param[7].data.d_float;
mix.green.green_gain = param[8].data.d_float;
mix.green.blue_gain = param[9].data.d_float;
mix.blue.red_gain = param[10].data.d_float;
mix.blue.green_gain = param[11].data.d_float;
mix.blue.blue_gain = param[12].data.d_float;
}
break;
case GIMP_RUN_WITH_LAST_VALS:
gimp_get_data (PLUG_IN_NAME, &mix);
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
/* printf("Channel Mixer:: Mode:%d r %f g %f b %f\n ",
param[3].data.d_int32, mix.black.red_gain,
mix.black.green_gain, mix.black.blue_gain); */
gimp_progress_init (_(PLUG_IN_VERSION));
channel_mixer (drawable);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
if (run_mode == GIMP_RUN_INTERACTIVE)
gimp_set_data (PLUG_IN_NAME, &mix, sizeof (CmParamsType));
}
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
static gdouble
cm_calculate_norm (CmParamsType *mix,
CmChannelType *ch)
{
gdouble sum;
sum = ch->red_gain + ch->green_gain + ch->blue_gain;
if (sum == 0.0 || mix->preserve_luminosity_flag == FALSE)
return 1.0;
return fabs (1 / sum);
}
static inline guchar
cm_mix_pixel (CmChannelType *ch,
guchar r,
guchar g,
guchar b,
gdouble norm)
{
gdouble c = ch->red_gain * r + ch->green_gain * g + ch->blue_gain * b;
c *= norm;
return (guchar) CLAMP0255 (c);
}
static void
channel_mixer (GimpDrawable *drawable)
{
GimpPixelRgn src_rgn, dest_rgn;
guchar *src, *dest;
gpointer pr;
gint x, y;
gint total, processed = 0;
gboolean has_alpha;
gdouble red_norm, green_norm, blue_norm, black_norm;
gint x1, y1, x2, y2;
gint width, height;
gimp_drawable_mask_bounds (drawable->drawable_id,
&x1, &y1, &x2, &y2);
width = x2 - x1;
height = y2 - y1;
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
total = width * height;
gimp_tile_cache_ntiles (2 * (drawable->width / gimp_tile_width () + 1));
gimp_pixel_rgn_init (&src_rgn, drawable,
x1, y1, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&dest_rgn, drawable,
x1, y1, width, height, TRUE, TRUE);
red_norm = cm_calculate_norm (&mix, &mix.red);
green_norm = cm_calculate_norm (&mix, &mix.green);
blue_norm = cm_calculate_norm (&mix, &mix.blue);
black_norm = cm_calculate_norm (&mix, &mix.black);
for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
pr != NULL; pr = gimp_pixel_rgns_process (pr))
{
gint offset;
for (y = 0; y < src_rgn.h; y++)
{
src = src_rgn.data + y * src_rgn.rowstride;
dest = dest_rgn.data + y * dest_rgn.rowstride;
offset = 0;
for (x = 0; x < src_rgn.w; x++)
{
guchar r, g, b;
r = src[offset + 0];
g = src[offset + 1];
b = src[offset + 2];
if (mix.monochrome_flag == TRUE)
{
dest[offset + 0] =
dest[offset + 1] =
dest[offset + 2] =
cm_mix_pixel (&mix.black, r, g, b, black_norm);
}
else
{
dest[offset + 0] =
cm_mix_pixel (&mix.red, r, g, b, red_norm);
dest[offset + 1] =
cm_mix_pixel (&mix.green, r, g, b, green_norm);
dest[offset + 2] =
cm_mix_pixel (&mix.blue, r, g, b, blue_norm);
}
offset += 3;
if (has_alpha)
{
dest[offset] = src[offset];
offset++;
}
/* update progress */
if ((++processed % (total / PROGRESS_UPDATE_NUM + 1)) == 0)
gimp_progress_update ((gdouble) processed / (gdouble) total);
}
}
}
gimp_progress_update (1.0);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id,
x1, y1, width, height);
}
static gboolean
cm_dialog (GimpDrawable *drawable)
{
GtkWidget *dialog;
GtkWidget *main_vbox;
GtkWidget *frame;
GtkWidget *hbox;
GtkWidget *button;
GtkWidget *label;
GtkWidget *image;
GtkWidget *table;
gdouble red_value, green_value, blue_value;
gboolean run;
gimp_ui_init ("channel_mixer", FALSE);
/* get values */
if (mix.monochrome_flag == TRUE)
{
red_value = mix.black.red_gain * 100;
green_value = mix.black.green_gain * 100;
blue_value = mix.black.blue_gain * 100;
}
else
{
switch (mix.output_channel)
{
case CM_RED_CHANNEL:
red_value = mix.red.red_gain * 100;
green_value = mix.red.green_gain * 100;
blue_value = mix.red.blue_gain * 100;
break;
case CM_GREEN_CHANNEL:
red_value = mix.green.red_gain * 100;
green_value = mix.green.green_gain * 100;
blue_value = mix.green.blue_gain * 100;
break;
case CM_BLUE_CHANNEL:
red_value = mix.blue.red_gain * 100;
green_value = mix.blue.green_gain * 100;
blue_value = mix.blue.blue_gain * 100;
break;
default:
g_assert_not_reached ();
red_value = green_value = blue_value = 0.0;
break;
}
}
dialog = gimp_dialog_new (_("Channel Mixer"), "mixer",
NULL, 0,
gimp_standard_help_func, HELP_ID,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
main_vbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), main_vbox);
gtk_widget_show (main_vbox);
preview = gimp_aspect_preview_new (drawable, &mix.preview);
gtk_box_pack_start_defaults (GTK_BOX (main_vbox), preview);
gtk_widget_show (preview);
g_signal_connect_swapped (preview, "invalidated",
G_CALLBACK (cm_preview),
&mix);
frame = gimp_frame_new (NULL);
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
hbox = gtk_hbox_new (FALSE, 6);
gtk_frame_set_label_widget (GTK_FRAME (frame), hbox);
gtk_widget_show (hbox);
label = gtk_label_new_with_mnemonic (_("O_utput channel:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
mix.combo = gimp_int_combo_box_new (NULL, 0);
gimp_int_combo_box_append (GIMP_INT_COMBO_BOX (mix.combo),
GIMP_INT_STORE_VALUE, CM_RED_CHANNEL,
GIMP_INT_STORE_LABEL, _("Red"),
GIMP_INT_STORE_STOCK_ID, GIMP_STOCK_CHANNEL_RED,
-1);
gimp_int_combo_box_append (GIMP_INT_COMBO_BOX (mix.combo),
GIMP_INT_STORE_VALUE, CM_GREEN_CHANNEL,
GIMP_INT_STORE_LABEL, _("Green"),
GIMP_INT_STORE_STOCK_ID, GIMP_STOCK_CHANNEL_GREEN,
-1);
gimp_int_combo_box_append (GIMP_INT_COMBO_BOX (mix.combo),
GIMP_INT_STORE_VALUE, CM_BLUE_CHANNEL,
GIMP_INT_STORE_LABEL, _("Blue"),
GIMP_INT_STORE_STOCK_ID, GIMP_STOCK_CHANNEL_BLUE,
-1);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (mix.combo),
mix.output_channel);
g_signal_connect (mix.combo, "changed",
G_CALLBACK (cm_combo_callback),
&mix);
gtk_box_pack_start (GTK_BOX (hbox), mix.combo, TRUE, TRUE, 0);
gtk_widget_show (mix.combo);
if (mix.monochrome_flag)
gtk_widget_set_sensitive (mix.combo, FALSE);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), mix.combo);
/*........................................................... */
table = gtk_table_new (3, 4, FALSE);
gtk_table_set_row_spacings (GTK_TABLE (table), 6);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_container_add (GTK_CONTAINER (frame), table);
gtk_widget_show (table);
image = gtk_image_new_from_stock (GIMP_STOCK_CHANNEL_RED,
GTK_ICON_SIZE_BUTTON);
gtk_table_attach (GTK_TABLE (table), image,
0, 1, 0, 1, GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (image);
mix.red_data =
GTK_ADJUSTMENT (gimp_scale_entry_new (GTK_TABLE (table), 1, 0,
_("_Red:"), 150, -1,
red_value, -200.0, 200.0,
1.0, 10.0, 1,
TRUE, 0.0, 0.0,
NULL, NULL));
g_signal_connect (mix.red_data, "value_changed",
G_CALLBACK (cm_red_scale_callback),
&mix);
image = gtk_image_new_from_stock (GIMP_STOCK_CHANNEL_GREEN,
GTK_ICON_SIZE_BUTTON);
gtk_table_attach (GTK_TABLE (table), image,
0, 1, 1, 2, GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (image);
mix.green_data =
GTK_ADJUSTMENT (gimp_scale_entry_new (GTK_TABLE (table), 1, 1,
_("_Green:"), 150, -1,
green_value, -200.0, 200.0,
1.0, 10.0, 1,
TRUE, 0.0, 0.0,
NULL, NULL));
g_signal_connect (mix.green_data, "value_changed",
G_CALLBACK (cm_green_scale_callback),
&mix);
image = gtk_image_new_from_stock (GIMP_STOCK_CHANNEL_BLUE,
GTK_ICON_SIZE_BUTTON);
gtk_table_attach (GTK_TABLE (table), image,
0, 1, 2, 3, GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (image);
mix.blue_data =
GTK_ADJUSTMENT (gimp_scale_entry_new (GTK_TABLE (table), 1, 2,
_("_Blue:"), 150, -1,
blue_value, -200.0, 200.0,
1.0, 10.0, 1,
TRUE, 0.0, 0.0,
NULL, NULL));
g_signal_connect (mix.blue_data, "value_changed",
G_CALLBACK (cm_blue_scale_callback),
&mix);
/* The monochrome toggle */
mix.monochrome_toggle = gtk_check_button_new_with_mnemonic (_("_Monochrome"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (mix.monochrome_toggle),
mix.monochrome_flag);
gtk_box_pack_start (GTK_BOX (main_vbox), mix.monochrome_toggle, FALSE, FALSE, 0);
gtk_widget_show (mix.monochrome_toggle);
g_signal_connect (mix.monochrome_toggle, "toggled",
G_CALLBACK (cm_monochrome_callback),
&mix);
/* The preserve luminosity toggle */
mix.preserve_luminosity_toggle =
gtk_check_button_new_with_mnemonic (_("Preserve _luminosity"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON
(mix.preserve_luminosity_toggle),
mix.preserve_luminosity_flag);
gtk_box_pack_start (GTK_BOX (main_vbox), mix.preserve_luminosity_toggle,
FALSE, FALSE, 0);
gtk_widget_show (mix.preserve_luminosity_toggle);
g_signal_connect (mix.preserve_luminosity_toggle, "toggled",
G_CALLBACK (cm_preserve_luminosity_callback),
&mix);
/*........................................................... */
/* Horizontal box for file i/o */
hbox = gtk_hbox_new (FALSE, 6);
gtk_box_pack_end (GTK_BOX (main_vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
button = gtk_button_new_from_stock (GTK_STOCK_OPEN);
gtk_container_add (GTK_CONTAINER (hbox), button);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (cm_load_file_callback),
&mix);
button = gtk_button_new_from_stock (GTK_STOCK_SAVE);
gtk_container_add (GTK_CONTAINER (hbox), button);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (cm_save_file_callback),
&mix);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
static void
cm_red_scale_callback (GtkAdjustment *adjustment,
CmParamsType *mix)
{
if (mix->monochrome_flag == TRUE)
mix->black.red_gain = adjustment->value / 100.0;
else
switch (mix->output_channel)
{
case CM_RED_CHANNEL:
mix->red.red_gain = adjustment->value / 100.0;
break;
case CM_GREEN_CHANNEL:
mix->green.red_gain = adjustment->value / 100.0;
break;
case CM_BLUE_CHANNEL:
mix->blue.red_gain = adjustment->value / 100.0;
break;
}
gimp_preview_invalidate (GIMP_PREVIEW (preview));
}
static void
cm_green_scale_callback (GtkAdjustment *adjustment,
CmParamsType *mix)
{
if (mix->monochrome_flag == TRUE)
mix->black.green_gain = adjustment->value / 100.0;
else
switch (mix->output_channel)
{
case CM_RED_CHANNEL:
mix->red.green_gain = adjustment->value / 100.0;
break;
case CM_GREEN_CHANNEL:
mix->green.green_gain = adjustment->value / 100.0;
break;
case CM_BLUE_CHANNEL:
mix->blue.green_gain = adjustment->value / 100.0;
break;
}
gimp_preview_invalidate (GIMP_PREVIEW (preview));
}
static void
cm_blue_scale_callback (GtkAdjustment *adjustment,
CmParamsType *mix)
{
if (mix->monochrome_flag == TRUE)
mix->black.blue_gain = adjustment->value / 100.0;
else
switch (mix->output_channel)
{
case CM_RED_CHANNEL:
mix->red.blue_gain = adjustment->value / 100.0;
break;
case CM_GREEN_CHANNEL:
mix->green.blue_gain = adjustment->value / 100.0;
break;
case CM_BLUE_CHANNEL:
mix->blue.blue_gain = adjustment->value / 100.0;
break;
}
gimp_preview_invalidate (GIMP_PREVIEW (preview));
}
static void
cm_preview (CmParamsType *mix,
GimpPreview *preview)
{
guchar *dst, *src;
gint x, y;
gint offset, rowsize;
gdouble red_norm, green_norm, blue_norm, black_norm;
gint width, height, bpp;
GimpDrawable *drawable = GIMP_ASPECT_PREVIEW (preview)->drawable;
red_norm = cm_calculate_norm (mix, &mix->red);
green_norm = cm_calculate_norm (mix, &mix->green);
blue_norm = cm_calculate_norm (mix, &mix->blue);
black_norm = cm_calculate_norm (mix, &mix->black);
gimp_preview_get_size (GIMP_PREVIEW (preview), &width, &height);
bpp = gimp_drawable_bpp (drawable->drawable_id);
src = gimp_drawable_get_thumbnail_data (drawable->drawable_id,
&width, &height, &bpp);
rowsize = width * bpp;
dst = g_new (guchar, rowsize * height);
offset = 0;
for (y = 0; y < height; y++)
{
for (x = 0; x < width; x++)
{
guchar r, g, b;
r = src[offset + 0];
g = src[offset + 1];
b = src[offset + 2];
if (mix->monochrome_flag == TRUE)
{
dst[offset + 0] =
dst[offset + 1] =
dst[offset + 2] =
cm_mix_pixel (&mix->black, r, g, b, black_norm);
}
else
{
dst[offset + 0] =
cm_mix_pixel (&mix->red, r, g, b, red_norm);
dst[offset + 1] =
cm_mix_pixel (&mix->green, r, g, b, green_norm);
dst[offset + 2] =
cm_mix_pixel (&mix->blue, r, g, b, blue_norm);
}
if (bpp == 4)
dst[offset + 3] = src[offset + 3];
offset += bpp;
}
}
gimp_preview_draw_buffer (GIMP_PREVIEW (preview), dst, bpp * width);
g_free (dst);
}
static void
cm_monochrome_callback (GtkWidget *widget,
CmParamsType *mix)
{
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
{
mix->old_output_channel = mix->output_channel;
mix->monochrome_flag = TRUE;
gtk_widget_set_sensitive (mix->combo, FALSE);
}
else
{
mix->output_channel = mix->old_output_channel;
mix->monochrome_flag = FALSE;
gtk_widget_set_sensitive (mix->combo, TRUE);
}
cm_set_adjusters (mix);
gimp_preview_invalidate (GIMP_PREVIEW (preview));
}
static void
cm_preserve_luminosity_callback (GtkWidget *widget,
CmParamsType *mix)
{
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
mix->preserve_luminosity_flag = TRUE;
else
mix->preserve_luminosity_flag = FALSE;
gimp_preview_invalidate (GIMP_PREVIEW (preview));
}
static gchar *
cm_settings_filename (void)
{
return g_build_filename (gimp_directory (),
"channel-mixer",
"settings",
NULL);
}
static void
cm_load_file_callback (GtkWidget *widget,
CmParamsType *mix)
{
static GtkWidget *dialog = NULL;
if (! dialog)
{
GtkWidget *parent = gtk_widget_get_toplevel (widget);
gchar *name;
dialog =
gtk_file_chooser_dialog_new (_("Load Channel Mixer Settings"),
GTK_WINDOW (parent),
GTK_FILE_CHOOSER_ACTION_OPEN,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OPEN, GTK_RESPONSE_OK,
NULL);
gimp_help_connect (dialog, gimp_standard_help_func, HELP_ID, NULL);
g_signal_connect (dialog, "response",
G_CALLBACK (cm_load_file_response_callback),
mix);
g_signal_connect (dialog, "delete_event",
G_CALLBACK (gtk_true),
NULL);
name = cm_settings_filename ();
gtk_file_chooser_set_filename (GTK_FILE_CHOOSER (dialog), name);
g_free (name);
}
gtk_window_present (GTK_WINDOW (dialog));
}
static void
cm_load_file_response_callback (GtkWidget *dialog,
gint response_id,
CmParamsType *mix)
{
FILE *fp;
if (response_id == GTK_RESPONSE_OK)
{
gchar *filename;
filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
fp = fopen (filename, "r");
if (fp)
{
gchar buf[3][CM_LINE_SIZE];
buf[0][0] = '\0';
buf[1][0] = '\0';
buf[2][0] = '\0';
fgets (buf[0], CM_LINE_SIZE - 1, fp);
fscanf (fp, "%*s %s", buf[0]);
if (strcmp (buf[0], "RED") == 0)
mix->output_channel = CM_RED_CHANNEL;
else if (strcmp (buf[0], "GREEN") == 0)
mix->output_channel = CM_GREEN_CHANNEL;
else if (strcmp (buf[0], "BLUE") == 0)
mix->output_channel = CM_BLUE_CHANNEL;
fscanf (fp, "%*s %s", buf[0]); /* preview flag, preserved for compatibility */
fscanf (fp, "%*s %s", buf[0]);
if (strcmp (buf[0], "TRUE") == 0)
mix->monochrome_flag = TRUE;
else
mix->monochrome_flag = FALSE;
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (mix->monochrome_toggle),
mix->monochrome_flag);
fscanf (fp, "%*s %s", buf[0]);
if (strcmp (buf[0], "TRUE") == 0)
mix->preserve_luminosity_flag = TRUE;
else
mix->preserve_luminosity_flag = FALSE;
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (mix->preserve_luminosity_toggle),
mix->preserve_luminosity_flag);
fscanf (fp, "%*s %s %s %s", buf[0], buf[1], buf[2]);
mix->red.red_gain = g_ascii_strtod (buf[0], NULL);
mix->red.green_gain = g_ascii_strtod (buf[1], NULL);
mix->red.blue_gain = g_ascii_strtod (buf[2], NULL);
fscanf (fp, "%*s %s %s %s", buf[0], buf[1], buf[2]);
mix->green.red_gain = g_ascii_strtod (buf[0], NULL);
mix->green.green_gain = g_ascii_strtod (buf[1], NULL);
mix->green.blue_gain = g_ascii_strtod (buf[2], NULL);
fscanf (fp, "%*s %s %s %s", buf[0], buf[1], buf[2]);
mix->blue.red_gain = g_ascii_strtod (buf[0], NULL);
mix->blue.green_gain = g_ascii_strtod (buf[1], NULL);
mix->blue.blue_gain = g_ascii_strtod (buf[2], NULL);
fscanf (fp, "%*s %s %s %s", buf[0], buf[1], buf[2]);
mix->black.red_gain = g_ascii_strtod (buf[0], NULL);
mix->black.green_gain = g_ascii_strtod (buf[1], NULL);
mix->black.blue_gain = g_ascii_strtod (buf[2], NULL);
fclose (fp);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (mix->combo),
mix->output_channel);
cm_set_adjusters (mix);
gimp_preview_invalidate (GIMP_PREVIEW (preview));
}
else
{
g_message (_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename),
g_strerror (errno));
}
g_free (filename);
}
gtk_widget_hide (dialog);
}
static void
cm_save_file_callback (GtkWidget *widget,
CmParamsType *mix)
{
static GtkWidget *dialog = NULL;
if (! dialog)
{
GtkWidget *parent = gtk_widget_get_toplevel (widget);
gchar *name;
dialog =
gtk_file_chooser_dialog_new (_("Save Channel Mixer Settings"),
GTK_WINDOW (parent),
GTK_FILE_CHOOSER_ACTION_SAVE,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_SAVE, GTK_RESPONSE_OK,
NULL);
gimp_help_connect (dialog, gimp_standard_help_func, HELP_ID, NULL);
g_signal_connect (dialog, "response",
G_CALLBACK (cm_save_file_response_callback),
mix);
g_signal_connect (dialog, "delete_event",
G_CALLBACK (gtk_true),
NULL);
name = cm_settings_filename ();
gtk_file_chooser_set_filename (GTK_FILE_CHOOSER (dialog), name);
g_free (name);
}
gtk_window_present (GTK_WINDOW (dialog));
}
static void
cm_save_file_response_callback (GtkWidget *dialog,
gint response_id,
CmParamsType *mix)
{
gchar *filename;
FILE *file = NULL;
if (response_id != GTK_RESPONSE_OK)
{
gtk_widget_hide (dialog);
return;
}
filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
if (! filename)
return;
if (g_file_test (filename, G_FILE_TEST_EXISTS) &&
! cm_force_overwrite (filename, dialog))
{
g_free (filename);
return;
}
file = fopen (filename, "w");
if (! file)
{
g_message (_("Could not open '%s' for writing: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
g_free (filename);
return;
}
cm_save_file (mix, file);
g_message (_("Parameters were saved to '%s'"),
gimp_filename_to_utf8 (filename));
gtk_widget_hide (dialog);
}
static gboolean
cm_force_overwrite (const gchar *filename,
GtkWidget *parent)
{
GtkWidget *dlg;
GtkWidget *label;
GtkWidget *hbox;
gchar *buffer;
gboolean overwrite;
dlg = gimp_dialog_new (_("Channel Mixer File Operation Warning"),
"channel_mixer",
parent, GTK_DIALOG_MODAL,
gimp_standard_help_func, HELP_ID,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
hbox = gtk_hbox_new (FALSE, 0);
gtk_container_set_border_width (GTK_CONTAINER (hbox), 12);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
buffer = g_strdup_printf (_("File '%s' exists.\n"
"Overwrite it?"), filename);
label = gtk_label_new (buffer);
g_free (buffer);
gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
gtk_widget_show (dlg);
overwrite = (gimp_dialog_run (GIMP_DIALOG (dlg)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dlg);
return overwrite;
}
static void
cm_save_file (CmParamsType *mix,
FILE *fp)
{
const gchar *str = NULL;
gchar buf[3][G_ASCII_DTOSTR_BUF_SIZE];
switch (mix->output_channel)
{
case CM_RED_CHANNEL:
str = "RED";
break;
case CM_GREEN_CHANNEL:
str = "GREEN";
break;
case CM_BLUE_CHANNEL:
str = "BLUE";
break;
default:
g_assert_not_reached ();
break;
}
fprintf (fp, "# Channel Mixer Configuration File\n");
fprintf (fp, "CHANNEL: %s\n", str);
fprintf (fp, "PREVIEW: %s\n", "TRUE"); /* preserved for compatibility */
fprintf (fp, "MONOCHROME: %s\n",
mix->monochrome_flag ? "TRUE" : "FALSE");
fprintf (fp, "PRESERVE_LUMINOSITY: %s\n",
mix->preserve_luminosity_flag ? "TRUE" : "FALSE");
fprintf (fp, "RED: %s %s %s\n",
g_ascii_formatd (buf[0], sizeof (buf[0]), "%5.3f",
mix->red.red_gain),
g_ascii_formatd (buf[1], sizeof (buf[1]), "%5.3f",
mix->red.green_gain),
g_ascii_formatd (buf[2], sizeof (buf[2]), "%5.3f",
mix->red.blue_gain));
fprintf (fp, "GREEN: %s %s %s\n",
g_ascii_formatd (buf[0], sizeof (buf[0]), "%5.3f",
mix->green.red_gain),
g_ascii_formatd (buf[1], sizeof (buf[1]), "%5.3f",
mix->green.green_gain),
g_ascii_formatd (buf[2], sizeof (buf[2]), "%5.3f",
mix->green.blue_gain));
fprintf (fp, "BLUE: %s %s %s\n",
g_ascii_formatd (buf[0], sizeof (buf[0]), "%5.3f",
mix->blue.red_gain),
g_ascii_formatd (buf[1], sizeof (buf[1]), "%5.3f",
mix->blue.green_gain),
g_ascii_formatd (buf[2], sizeof (buf[2]), "%5.3f",
mix->blue.blue_gain));
fprintf (fp, "BLACK: %s %s %s\n",
g_ascii_formatd (buf[0], sizeof (buf[0]), "%5.3f",
mix->black.red_gain),
g_ascii_formatd (buf[1], sizeof (buf[1]), "%5.3f",
mix->black.green_gain),
g_ascii_formatd (buf[2], sizeof (buf[2]), "%5.3f",
mix->black.blue_gain));
fclose (fp);
}
static void
cm_combo_callback (GtkWidget *widget,
CmParamsType *mix)
{
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget),
(gint *) &mix->output_channel);
cm_set_adjusters (mix);
}
static void
cm_set_adjusters (CmParamsType *mix)
{
if (mix->monochrome_flag == TRUE)
{
gtk_adjustment_set_value (mix->red_data, mix->black.red_gain * 100.0);
gtk_adjustment_set_value (mix->green_data, mix->black.green_gain * 100.0);
gtk_adjustment_set_value (mix->blue_data, mix->black.blue_gain * 100.0);
return;
}
switch (mix->output_channel)
{
case CM_RED_CHANNEL:
gtk_adjustment_set_value (mix->red_data, mix->red.red_gain * 100.0);
gtk_adjustment_set_value (mix->green_data, mix->red.green_gain * 100.0);
gtk_adjustment_set_value (mix->blue_data, mix->red.blue_gain * 100.0);
break;
case CM_GREEN_CHANNEL:
gtk_adjustment_set_value (mix->red_data, mix->green.red_gain * 100.0);
gtk_adjustment_set_value (mix->green_data, mix->green.green_gain * 100.0);
gtk_adjustment_set_value (mix->blue_data, mix->green.blue_gain * 100.0);
break;
case CM_BLUE_CHANNEL:
gtk_adjustment_set_value (mix->red_data, mix->blue.red_gain * 100.0);
gtk_adjustment_set_value (mix->green_data, mix->blue.green_gain * 100.0);
gtk_adjustment_set_value (mix->blue_data, mix->blue.blue_gain * 100.0);
break;
}
}
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