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gimp/plug-ins/common/blinds.c

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/*
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This is a plug-in for the GIMP.
*
* Blinds plug-in. Distort an image as though it was stuck to
* window blinds and the blinds where opened/closed.
*
* Copyright (C) 1997 Andy Thomas alt@picnic.demon.co.uk
*
* 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.
*
* A fair proprotion of this code was taken from the Whirl plug-in
* which was copyrighted by Federico Mena Quintero (as below).
*
* Whirl plug-in --- distort an image into a whirlpool
* Copyright (C) 1997 Federico Mena Quintero
*
*/
/* Change log:-
*
* Version 0.5 10 June 1997.
* Changes required to work with 0.99.10.
*
* Version 0.4 20 May 1997.
* Fixed problem with using this plugin in RUN_NONINTERACTIVE mode
*
* Version 0.3 8 May 1997.
* Make preview work in Quartics words "The Right Way".
*
* Allow the background to be transparent.
*
* Version 0.2 1 May 1997 (not released).
* Added patches supplied by Tim Mooney mooney@dogbert.cc.ndsu.NoDak.edu
* to allow the plug-in to build with Digitals compiler.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "gtk/gtk.h"
#include "libgimp/gimp.h"
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif /* M_PI */
/***** Magic numbers *****/
/* Don't make preview >255!!! It won't work for horizontal blinds */
#define PREVIEW_SIZE 128
#define SCALE_WIDTH 150
#define ENTRY_WIDTH 30
/* Even more stuff from Quartics plugins */
#define CHECK_SIZE 8
#define CHECK_DARK ((int) (1.0 / 3.0 * 255))
#define CHECK_LIGHT ((int) (2.0 / 3.0 * 255))
#define MAX_FANS 10
#define HORIZONTAL 0
#define VERTICAL 1
/* Variables set in dialog box */
typedef struct data {
gint angledsp;
gint numsegs;
gint orientation;
gint bg_trans;
} BlindVals;
typedef struct {
GtkWidget *preview;
guchar preview_row[PREVIEW_SIZE * 4];
gint run;
guchar * pv_cache;
gint img_bpp;
} BlindsInterface;
static BlindsInterface bint =
{
NULL, /* Preview */
{'4','u'}, /* Preview_row */
FALSE, /* run */
NULL,
4 /* bpp of drawable */
};
/* Array to hold each size of fans. And no there are not each the
* same size (rounding errors...)
*/
int fanwidths[MAX_FANS];
GDrawable *blindsdrawable;
static void query (void);
static void run (gchar *name,
gint nparams,
GParam *param,
gint *nreturn_vals,
GParam **return_vals);
static gint blinds_dialog (void);
static void blinds_close_callback (GtkWidget *widget, gpointer data);
static void blinds_ok_callback (GtkWidget *widget, gpointer data);
static void blinds_scale_update (GtkAdjustment *adjustment, gint *size_val);
static void blinds_entry_update(GtkWidget *widget, gint *value);
static void blinds_toggle_update (GtkWidget *widget, gpointer data);
static void blinds_button_update (GtkWidget *widget, gpointer data);
static void dialog_update_preview(void);
static void cache_preview(void);
static void apply_blinds(void);
static int blinds_get_bg(guchar *bg);
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
/* Values when first invoked */
static BlindVals bvals =
{
30,
3,
HORIZONTAL,
FALSE
};
/* Stuff for the preview bit */
static gint sel_x1, sel_y1, sel_x2, sel_y2;
static gint sel_width, sel_height;
static gint preview_width, preview_height;
static gint do_horizontal;
static gint do_vertical;
static gint do_trans;
static gint has_alpha;
MAIN ()
static void
query ()
{
static GParamDef args[] =
{
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_IMAGE, "image", "Input image (unused)" },
{ PARAM_DRAWABLE, "drawable", "Input drawable" },
{ PARAM_INT32, "angle_dsp", "Angle of Displacement " },
{ PARAM_INT32, "number_of_segments", "Number of segments in blinds" },
{ PARAM_INT32, "orientation", "orientation; 0 = Horizontal, 1 = Vertical" },
{ PARAM_INT32, "backgndg_trans", "background transparent; FALSE,TRUE" }
};
static GParamDef *return_vals = NULL;
static int nargs = sizeof (args) / sizeof (args[0]);
static int nreturn_vals = 0;
gimp_install_procedure ("plug_in_blinds",
"Adds a blinds effect to the image. Rather like putting the image on a set of window blinds and the closing or opening the blinds",
"More here later",
"Andy Thomas",
"Andy Thomas",
"1997",
"<Image>/Filters/Distorts/Blinds",
"RGB*, GRAY*",
PROC_PLUG_IN,
nargs, nreturn_vals,
args, return_vals);
}
static void
run (gchar *name,
gint nparams,
GParam *param,
gint *nreturn_vals,
GParam **return_vals)
{
static GParam values[1];
GDrawable *drawable;
GRunModeType run_mode;
GStatusType status = STATUS_SUCCESS;
int pwidth, pheight;
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = PARAM_STATUS;
values[0].data.d_status = status;
blindsdrawable =
drawable =
gimp_drawable_get (param[2].data.d_drawable);
gimp_drawable_mask_bounds(drawable->id, &sel_x1, &sel_y1, &sel_x2, &sel_y2);
sel_width = sel_x2 - sel_x1;
sel_height = sel_y2 - sel_y1;
/* Calculate preview size */
if (sel_width > sel_height) {
pwidth = MIN(sel_width, PREVIEW_SIZE);
pheight = sel_height * pwidth / sel_width;
} else {
pheight = MIN(sel_height, PREVIEW_SIZE);
pwidth = sel_width * pheight / sel_height;
}
preview_width = MAX(pwidth, 2); /* Min size is 2 */
preview_height = MAX(pheight, 2);
switch (run_mode)
{
case RUN_INTERACTIVE:
gimp_get_data ("plug_in_blinds", &bvals);
if (! blinds_dialog())
{
gimp_drawable_detach (drawable);
return;
}
break;
case RUN_NONINTERACTIVE:
if (nparams != 7)
status = STATUS_CALLING_ERROR;
if (status == STATUS_SUCCESS)
{
bvals.angledsp = param[3].data.d_int32;
bvals.numsegs = param[4].data.d_int32;
bvals.orientation = param[5].data.d_int32;
bvals.bg_trans = param[6].data.d_int32;
}
break;
case RUN_WITH_LAST_VALS:
gimp_get_data ("plug_in_blinds", &bvals);
break;
default:
break;
}
if (gimp_drawable_color (drawable->id) || gimp_drawable_gray (drawable->id))
{
gimp_progress_init ("Adding Blinds ...");
apply_blinds();
if (run_mode != RUN_NONINTERACTIVE)
gimp_displays_flush ();
if (run_mode == RUN_INTERACTIVE)
gimp_set_data ("plug_in_blinds", &bvals, sizeof (BlindVals));
}
else
{
status = STATUS_EXECUTION_ERROR;
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
/* Build the dialog up. This was the hard part! */
static gint
blinds_dialog ()
{
GtkWidget *dlg;
GtkWidget *button;
GtkWidget *frame;
GtkWidget *xframe;
GtkWidget *table;
GtkWidget *label;
GtkWidget *entry;
GtkWidget *slider;
GtkObject *size_data;
GtkWidget *toggle_vbox;
GtkWidget *toggle;
GSList *orientation_group = NULL;
guchar *color_cube;
gchar **argv;
gint argc;
char buf[256];
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("blinds");
do_horizontal = (bvals.orientation == HORIZONTAL);
do_vertical = (bvals.orientation == VERTICAL);
do_trans = (bvals.bg_trans == TRUE);
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
/* Get the stuff for the preview window...*/
gtk_preview_set_gamma(gimp_gamma());
gtk_preview_set_install_cmap(gimp_install_cmap());
color_cube = gimp_color_cube();
gtk_preview_set_color_cube(color_cube[0], color_cube[1], color_cube[2], color_cube[3]);
gtk_widget_set_default_visual(gtk_preview_get_visual());
gtk_widget_set_default_colormap(gtk_preview_get_cmap());
cache_preview(); /* Get the preview image and store it also set has_alpha */
dlg = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (dlg), "Blinds");
gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
(GtkSignalFunc) blinds_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) blinds_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);
/* Start building the frame for the preview area */
frame = gtk_frame_new ("preview");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_container_border_width (GTK_CONTAINER (frame), 10);
table = gtk_table_new (5, 5, FALSE);
gtk_container_border_width (GTK_CONTAINER (table), 10);
gtk_container_add (GTK_CONTAINER (frame), table);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, TRUE, TRUE, 0);
bint.preview = gtk_preview_new(GTK_PREVIEW_COLOR);
gtk_preview_size(GTK_PREVIEW(bint.preview), preview_width, preview_height);
xframe = gtk_frame_new(NULL);
gtk_frame_set_shadow_type (GTK_FRAME (xframe), GTK_SHADOW_IN);
gtk_container_add(GTK_CONTAINER(xframe), bint.preview);
gtk_widget_show(xframe);
gtk_table_attach(GTK_TABLE(table), xframe, 0, 1, 0, 2, GTK_EXPAND , GTK_EXPAND, 0, 0);
gtk_widget_show(frame); /* ALT-I */
gtk_widget_show(table);
gtk_widget_show(bint.preview);
frame = gtk_frame_new ("Orientation");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_table_attach (GTK_TABLE (table), frame, 1, 2, 0, 1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 5, 5);
toggle_vbox = gtk_vbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (toggle_vbox), 5);
gtk_container_add (GTK_CONTAINER (frame), toggle_vbox);
toggle = gtk_radio_button_new_with_label (orientation_group, "Horizontal");
orientation_group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (toggle_vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) blinds_toggle_update,
&do_horizontal);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), do_horizontal);
gtk_widget_show (toggle);
toggle = gtk_radio_button_new_with_label (orientation_group, "Vertical");
orientation_group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (toggle_vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) blinds_toggle_update,
&do_vertical);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), do_vertical);
gtk_widget_show (toggle);
gtk_widget_show (toggle_vbox);
gtk_widget_show(frame);
frame = gtk_frame_new ("Background");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_table_attach (GTK_TABLE (table), frame, 1, 2, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 5, 5);
toggle_vbox = gtk_vbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (toggle_vbox), 5);
gtk_container_add (GTK_CONTAINER (frame), toggle_vbox);
toggle = gtk_check_button_new_with_label ("Transparent");
gtk_box_pack_start (GTK_BOX (toggle_vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) blinds_button_update,
&do_trans);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), do_trans);
if(!has_alpha)
{
gtk_widget_set_sensitive(toggle,FALSE);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), FALSE);
}
gtk_widget_show (toggle);
gtk_widget_show (toggle_vbox);
gtk_widget_show(frame);
frame = gtk_frame_new ("Parameter Settings");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_container_border_width (GTK_CONTAINER (frame), 10);
table = gtk_table_new (5, 5, FALSE);
gtk_container_border_width (GTK_CONTAINER (table), 10);
gtk_container_add (GTK_CONTAINER (frame), table);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, TRUE, TRUE, 0);
label = gtk_label_new ("Displacement ");
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 1, 2, GTK_FILL | GTK_EXPAND, GTK_FILL, 4, 0);
gtk_widget_show (label);
size_data = gtk_adjustment_new (bvals.angledsp, 1, 90, 1, 1, 0);
slider = gtk_hscale_new (GTK_ADJUSTMENT (size_data));
gtk_widget_set_usize (slider, SCALE_WIDTH, 0);
gtk_table_attach (GTK_TABLE (table), slider, 2,3 , 1, 2, GTK_FILL | GTK_EXPAND, GTK_FILL, 0, 0);
gtk_scale_set_value_pos (GTK_SCALE (slider), GTK_POS_LEFT);
gtk_scale_set_digits (GTK_SCALE (slider), 0);
gtk_range_set_update_policy (GTK_RANGE (slider),GTK_UPDATE_CONTINUOUS );
gtk_signal_connect (GTK_OBJECT (size_data), "value_changed",
(GtkSignalFunc) blinds_scale_update,
&bvals.angledsp);
gtk_widget_show (slider);
entry = gtk_entry_new();
gtk_object_set_user_data(GTK_OBJECT(entry), size_data);
gtk_object_set_user_data(size_data, entry);
gtk_widget_set_usize(entry, ENTRY_WIDTH, 0);
sprintf(buf, "%.2d", bvals.angledsp);
gtk_entry_set_text(GTK_ENTRY(entry), buf);
gtk_signal_connect(GTK_OBJECT(entry), "changed",
(GtkSignalFunc) blinds_entry_update,
&bvals.angledsp);
gtk_table_attach(GTK_TABLE(table), entry, 3, 4, 1, 2, GTK_FILL, GTK_FILL, 4, 0);
gtk_widget_show(entry);
label = gtk_label_new ("Num Segments ");
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 2, 3, GTK_FILL | GTK_EXPAND, GTK_FILL, 0, 0);
gtk_widget_show (label);
size_data = gtk_adjustment_new (bvals.numsegs, 1, MAX_FANS, 2, 1, 0);
slider = gtk_hscale_new (GTK_ADJUSTMENT (size_data));
gtk_widget_set_usize (slider, SCALE_WIDTH, 0);
gtk_table_attach (GTK_TABLE (table), slider, 2, 3, 2, 3, GTK_FILL | GTK_EXPAND, GTK_FILL, 0, 0);
gtk_scale_set_value_pos (GTK_SCALE (slider), GTK_POS_LEFT);
gtk_scale_set_digits (GTK_SCALE (slider), 0);
gtk_range_set_update_policy (GTK_RANGE (slider), GTK_UPDATE_CONTINUOUS);
gtk_signal_connect (GTK_OBJECT (size_data), "value_changed",
(GtkSignalFunc) blinds_scale_update,
&bvals.numsegs);
gtk_widget_show (slider);
entry = gtk_entry_new();
gtk_object_set_user_data(GTK_OBJECT(entry), size_data);
gtk_object_set_user_data(size_data, entry);
gtk_widget_set_usize(entry, ENTRY_WIDTH, 0);
sprintf(buf, "%d", bvals.numsegs);
gtk_entry_set_text(GTK_ENTRY(entry), buf);
gtk_signal_connect(GTK_OBJECT(entry), "changed",
(GtkSignalFunc) blinds_entry_update,
&bvals.numsegs);
gtk_table_attach(GTK_TABLE(table), entry, 3, 4, 2, 3, GTK_FILL, GTK_FILL, 4, 0);
gtk_widget_show(entry);
gtk_widget_show (frame);
gtk_widget_show (table);
gtk_widget_show (dlg);
dialog_update_preview();
gtk_main ();
gdk_flush ();
/* determine orientation */
if (do_horizontal)
bvals.orientation = HORIZONTAL;
else
bvals.orientation = VERTICAL;
/* Use trans bg ? */
bvals.bg_trans = do_trans;
return bint.run;
}
static void
blinds_close_callback (GtkWidget *widget,
gpointer data)
{
gtk_main_quit ();
}
static void
blinds_ok_callback (GtkWidget *widget,
gpointer data)
{
bint.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
static void
blinds_toggle_update(GtkWidget *widget,
gpointer data)
{
int *toggle_val;
toggle_val = (int *) data;
if (GTK_TOGGLE_BUTTON (widget)->active)
{
/* Only do for event that sets a toggle button to true */
/* This will break if any more toggles are added? */
*toggle_val = TRUE;
dialog_update_preview();
}
else
*toggle_val = FALSE;
}
static void
blinds_button_update(GtkWidget *widget,
gpointer data)
{
int *toggle_val;
toggle_val = (int *) data;
if (GTK_TOGGLE_BUTTON (widget)->active)
{
/* Only do for event that sets a toggle button to true */
/* This will break if any more toggles are added? */
*toggle_val = TRUE;
}
else
*toggle_val = FALSE;
dialog_update_preview();
}
static void
blinds_scale_update(GtkAdjustment *adjustment, gint *value)
{
GtkWidget *entry;
char buf[256];
if (*value != adjustment->value) {
*value = adjustment->value;
entry = gtk_object_get_user_data(GTK_OBJECT(adjustment));
sprintf(buf,"%d",*value);
gtk_signal_handler_block_by_data(GTK_OBJECT(entry), value);
gtk_entry_set_text(GTK_ENTRY(entry), buf);
gtk_signal_handler_unblock_by_data(GTK_OBJECT(entry), value);
dialog_update_preview();
}
}
static void
blinds_entry_update(GtkWidget *widget, gint *value)
{
GtkAdjustment *adjustment;
gdouble new_value;
new_value = atoi(gtk_entry_get_text(GTK_ENTRY(widget)));
if (*value != new_value) {
adjustment = gtk_object_get_user_data(GTK_OBJECT(widget));
if ((new_value >= adjustment->lower) &&
(new_value <= adjustment->upper)) {
*value = new_value;
adjustment->value = new_value;
gtk_signal_emit_by_name(GTK_OBJECT(adjustment), "value_changed");
dialog_update_preview();
}
}
}
/* Cache the preview image - updates are a lot faster. */
/* The preview_cache will contain the small image */
static void
cache_preview()
{
GPixelRgn src_rgn;
int y,x;
guchar *src_rows;
guchar *p;
int isgrey = 0;
gimp_pixel_rgn_init(&src_rgn,blindsdrawable,sel_x1,sel_y1,sel_width,sel_height,FALSE,FALSE);
src_rows = g_new(guchar ,sel_width*4);
p = bint.pv_cache = g_new(guchar ,preview_width*preview_height*4);
bint.img_bpp = gimp_drawable_bpp(blindsdrawable->id);
has_alpha = gimp_drawable_has_alpha(blindsdrawable->id);
if(bint.img_bpp < 3)
{
bint.img_bpp = 3 + has_alpha;
}
switch ( gimp_drawable_type (blindsdrawable->id) )
{
case GRAYA_IMAGE:
case GRAY_IMAGE:
isgrey = 1;
default:
break;
}
for (y = 0; y < preview_height; y++) {
gimp_pixel_rgn_get_row(&src_rgn,
src_rows,
sel_x1,
sel_y1 + (y*sel_height)/preview_height,
sel_width);
for (x = 0; x < (preview_width); x ++) {
/* Get the pixels of each col */
int i;
for (i = 0 ; i < 3; i++ )
p[x*bint.img_bpp+i] = src_rows[((x*sel_width)/preview_width)*src_rgn.bpp +((isgrey)?0:i)];
if(has_alpha)
p[x*bint.img_bpp+3] = src_rows[((x*sel_width)/preview_width)*src_rgn.bpp + ((isgrey)?1:3)];
}
p += (preview_width*bint.img_bpp);
}
g_free(src_rows);
}
static void
blindsapply(guchar *srow,guchar *drow,gint width,gint bpp,guchar *bg)
{
guchar *src;
guchar *dst;
int i,j,k;
double ang;
int available;
/* Make the row 'shrink' around points along its length */
/* The bvals.numsegs determins how many segments to slip it in to */
/* The angle is the conceptual 'rotation' of each of these segments */
/* Note the row is considered to be made up of a two dim array actual
* pixel locations and the RGB colour at these locations.
*/
/* In the process copy the src row to the destination row */
/* Fill in with background color ? */
for (i = 0 ; i < width ; i++)
{
dst = &drow[i*bpp];
for (j = 0 ; j < bpp; j++)
{
dst[j] = bg[j];
}
}
/* Apply it */
available = width;
for ( i = 0 ; i < bvals.numsegs; i++)
{
/* Width of segs are variable */
fanwidths[i] = available/(bvals.numsegs - i);
available -= fanwidths[i];
}
/* do center points first - just for fun...*/
available = 0;
for (k = 1 ; k <= bvals.numsegs; k++)
{
int point;
point = available + fanwidths[k-1]/2;
available += fanwidths[k-1];
src = &srow[point*bpp];
dst = &drow[point*bpp];
/* Copy pixels across */
for (j = 0 ; j < bpp; j++)
{
dst[j] = src[j];
}
}
/* Disp for each point */
ang = (bvals.angledsp*2*M_PI)/360; /* Angle in rads */
ang = (1-fabs(cos(ang)));
available = 0;
for(k = 0 ; k < bvals.numsegs; k++)
{
int dx; /* Amount to move by */
int fw;
for (i = 0 ; i < (fanwidths[k]/2) ; i++)
{
/* Copy pixels across of left half of fan */
fw = fanwidths[k]/2;
dx = (int)(ang * ((double)(fw - (double)(i%fw))));
src = &srow[(available+i)*bpp];
dst = &drow[(available+i+dx)*bpp];
for (j = 0 ; j < bpp; j++)
{
dst[j] = src[j];
}
/* Right side */
j = i + 1;
src = &srow[(available + fanwidths[k] - j - (fanwidths[k]%2))*bpp];
dst = &drow[(available + fanwidths[k] - j - (fanwidths[k]%2) - dx)*bpp];
for (j = 0 ; j < bpp; j++)
{
dst[j] = src[j];
}
}
available += fanwidths[k];
}
}
static int
blinds_get_bg(guchar *bg)
{
GParam *return_vals;
gint nreturn_vals;
/* Get the background color */
int retval = FALSE; /*Return TRUE if of GREYA type */
switch ( gimp_drawable_type (blindsdrawable->id) )
{
case RGBA_IMAGE:
bg[3] = (do_trans == TRUE)?0:255;
break;
case RGB_IMAGE :
return_vals = gimp_run_procedure ("gimp_palette_get_foreground",
&nreturn_vals,
PARAM_END);
return_vals = gimp_run_procedure ("gimp_palette_get_background",
&nreturn_vals,
PARAM_END);
if (return_vals[0].data.d_status == STATUS_SUCCESS)
{
bg[0] = return_vals[1].data.d_color.red;
bg[1] = return_vals[1].data.d_color.green;
bg[2] = return_vals[1].data.d_color.blue;
}
else
{
bg[0] = 0;
bg[1] = 0;
bg[2] = 0;
}
break;
case GRAYA_IMAGE:
retval = TRUE;
bg[3] = (do_trans == TRUE)?0:255;
break;
case GRAY_IMAGE:
bg[2] = 0;
bg[1] = 0;
bg[0] = 0;
break;
default:
break;
}
return retval;
}
static void
dialog_update_preview(void)
{
int y;
guchar *p;
guchar bg[4];
gint check,check_0,check_1;
p = bint.pv_cache;
blinds_get_bg(bg);
if(do_vertical)
{
for (y = 0; y < preview_height; y++) {
/* bint.preview_row - this row contains the row to apply the action to */
blindsapply(p,bint.preview_row,preview_width,bint.img_bpp,bg);
if ((y / CHECK_SIZE) & 1) {
check_0 = CHECK_DARK;
check_1 = CHECK_LIGHT;
} else {
check_0 = CHECK_LIGHT;
check_1 = CHECK_DARK;
}
if(bint.img_bpp > 3)
{
int i,j;
for (i = 0, j = 0 ; i < sizeof(bint.preview_row); i += 4, j += 3 )
{
gint alphaval;
if (((i/4) / CHECK_SIZE) & 1)
check = check_0;
else
check = check_1;
alphaval = bint.preview_row[i + 3];
bint.preview_row[j] =
check + (((bint.preview_row[i] - check)*alphaval)/255);
bint.preview_row[j + 1] =
check + (((bint.preview_row[i + 1] - check)*alphaval)/255);
bint.preview_row[j + 2] =
check + (((bint.preview_row[i + 2] - check)*alphaval)/255);
}
}
gtk_preview_draw_row(GTK_PREVIEW(bint.preview), bint.preview_row, 0, y, preview_width);
p += preview_width*bint.img_bpp;
}
}
else
{
/* Horizontal blinds */
/* Apply the blinds algo to a single column -
* this act as a transfomation matrix for the
* rows. Make row 0 invalid so we can find it again!
*/
int i;
int loop1,loop2;
guchar *sr = g_new(guchar,(preview_height)*4);
guchar *dr = g_new(guchar,(preview_height)*4);
guchar dummybg[4];
/* Copy into here after translation*/
guchar copy_row[PREVIEW_SIZE*4];
memset(dummybg,0,4);
memset(dr,0,(preview_height)*4); /* all dr rows are background rows */
/* Fill in with background color ? */
for (i = 0 ; i < preview_width ; i++)
{
int j;
int bd = bint.img_bpp;
guchar *dst;
dst = &bint.preview_row[i*bd];
for (j = 0 ; j < bd; j++)
{
dst[j] = bg[j];
}
}
for ( y = 0 ; y < preview_height; y++)
{
sr[y] = y+1;
}
/* Bit of a fiddle since blindsapply really works on an image
* row not a set of bytes. - preview can't be > 255
* or must make dr sr int rows.
*/
blindsapply(sr,dr,preview_height,1,dummybg);
for (y = 0; y < preview_height; y++) {
if ((y / CHECK_SIZE) & 1) {
check_0 = CHECK_DARK;
check_1 = CHECK_LIGHT;
} else {
check_0 = CHECK_LIGHT;
check_1 = CHECK_DARK;
}
if(dr[y] == 0)
{
/* Draw background line */
p = bint.preview_row;
}
else
{
/* Draw line from src */
p = bint.pv_cache + (preview_width*bint.img_bpp*(dr[y]-1));
}
if(bint.img_bpp > 3)
{
/* Take account of alpha channel HERE*/
for (loop1 = 0, loop2 = 0 ;
loop1 < preview_width*bint.img_bpp;
loop1 += 4, loop2 += 3)
{
gint alphaval;
if (((loop1/4) / CHECK_SIZE) & 1)
check = check_0;
else
check = check_1;
alphaval = p[loop1 + 3];
copy_row[loop2] =
check + (((p[loop1] - check)*alphaval)/255);
copy_row[loop2 + 1] =
check + (((p[loop1 + 1] - check)*alphaval)/255);
copy_row[loop2 + 2] =
check + (((p[loop1 + 2] - check)*alphaval)/255);
}
p = &copy_row[0];
}
gtk_preview_draw_row(GTK_PREVIEW(bint.preview), p, 0, y, preview_width);
}
g_free(sr);
g_free(dr);
}
gtk_widget_draw(bint.preview, NULL);
gdk_flush();
}
/* STEP tells us how many rows/columns to gulp down in one go... */
/* Note all the "4" literals around here are to do with the depths
* of the images. Makes it easier to deal with for my small brain.
*/
#define STEP 40
static void
apply_blinds(void)
{
GPixelRgn des_rgn;
GPixelRgn src_rgn;
guchar *src_rows,*des_rows;
int x,y;
guchar bg[4];
/* Adjust aplha channel if GREYA */
if(blinds_get_bg(bg) == TRUE)
bg[1] = (do_trans == TRUE)?0:255;
gimp_pixel_rgn_init(&src_rgn,blindsdrawable,sel_x1,sel_y1,sel_width,sel_height,FALSE,FALSE);
gimp_pixel_rgn_init(&des_rgn,blindsdrawable,sel_x1,sel_y1,sel_width,sel_height,TRUE,TRUE);
src_rows = g_new(guchar ,(MAX(sel_width,sel_height))*4*STEP);
des_rows = g_new(guchar ,(MAX(sel_width,sel_height))*4*STEP);
if(do_vertical)
{
for (y = 0; y < sel_height; y += STEP)
{
int rr;
int step;
if((y + STEP) > sel_height)
step = sel_height - y;
else
step = STEP;
gimp_pixel_rgn_get_rect(&src_rgn,
src_rows,
sel_x1,
sel_y1 + y,
sel_width,
step);
/* OK I could make this better */
for(rr = 0 ; rr < STEP; rr++)
blindsapply(src_rows+(sel_width*rr*src_rgn.bpp),
des_rows+(sel_width*rr*src_rgn.bpp),
sel_width,src_rgn.bpp,bg);
gimp_pixel_rgn_set_rect(&des_rgn,
des_rows,
sel_x1,
sel_y1 + y,
sel_width,
step);
gimp_progress_update((double)y/(double)sel_height);
}
}
else
{
/* Horizontal blinds */
/* Apply the blinds algo to a single column -
* this act as a transfomation matrix for the
* rows. Make row 0 invalid so we can find it again!
*/
int i;
gint *sr = g_new(gint,(sel_height)*4);
gint *dr = g_new(gint,(sel_height)*4);
guchar *dst = g_new(guchar,STEP*4);
guchar dummybg[4];
memset(dummybg,0,4);
memset(dr,0,(sel_height)*4); /* all dr rows are background rows */
for ( y = 0 ; y < sel_height; y++)
{
sr[y] = y+1;
}
/* Hmmm. does this work portably? */
/* This "swaps the intergers around that are held in in the
* sr & dr arrays.
*/
blindsapply((guchar*)sr,(guchar*)dr,sel_height,sizeof(gint),dummybg);
/* Fill in with background color ? */
for (i = 0 ; i < STEP ; i++)
{
int j;
guchar *bgdst;
bgdst = &dst[i*src_rgn.bpp];
for (j = 0 ; j < src_rgn.bpp; j++)
{
bgdst[j] = bg[j];
}
}
for (x = 0; x < sel_width; x += STEP)
{
int rr;
int step;
guchar *p;
if((x + STEP) > sel_width)
step = sel_width - x;
else
step = STEP;
gimp_pixel_rgn_get_rect(&src_rgn,
src_rows,
sel_x1 + x,
sel_y1,
step,
sel_height);
/* OK I could make this better */
for(rr = 0 ; rr < sel_height; rr++)
{
if(dr[rr] == 0)
{
/* Draw background line */
p = dst;
}
else
{
/* Draw line from src */
p = src_rows + (step*src_rgn.bpp*(dr[rr]-1));
}
memcpy(des_rows+(rr*step*src_rgn.bpp),p,step*src_rgn.bpp);
}
gimp_pixel_rgn_set_rect(&des_rgn,
des_rows,
sel_x1 + x,
sel_y1,
step,
sel_height);
gimp_progress_update((double)x/(double)sel_width);
}
g_free(dst);
g_free(sr);
g_free(dr);
}
g_free(src_rows);
g_free(des_rows);
gimp_drawable_flush(blindsdrawable);
gimp_drawable_merge_shadow(blindsdrawable->id, TRUE);
gimp_drawable_update(blindsdrawable->id, sel_x1, sel_y1, sel_width, sel_height);
}
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