| Newsgroups |
gmane.comp.video.gimp.windows.devel |
| Message-ID |
<[email protected]> |
Hi!
I'm a new Gimp plugins devlopper and I use MSVC++ 6.0 to create
program files.
I downloaded GTK+ and this program (see at bottom).
But I had many bugs when compiling it with MSVC.
Did I miss something special ?
Can I do to make it work ? Do I use special DLL to compile with ?
The generated errors are:
-----------------------------------------
Linking...
Essai.obj : error LNK2001: unresolved external symbol
_gtk_signal_connect_object
Essai.obj : error LNK2001: unresolved external symbol
_gtk_signal_connect
Essai.obj : error LNK2001: unresolved external symbol
_gtk_type_check_object_cast
Essai.obj : error LNK2001: unresolved external symbol
_gtk_widget_set_default_visual
Essai.obj : error LNK2001: unresolved external symbol
_gtk_signal_connect_after
Essai.obj : error LNK2001: unresolved external symbol
_gtk_signal_handler_unblock_by_data
Essai.obj : error LNK2001: unresolved external symbol
_gtk_signal_handler_block_by_data
Debug/HELLO.exe : fatal error LNK1120: 7 unresolved externals
Error executing link.exe.
Creating browse info file...
HELLO.exe - 8 error(s), 10 warning(s)
-----------------------------------------------------
It's urgent because I have just one month to create a plugin in C
langage which will be able to work with Gimp.
Thansks a lot.
Chicosi.
Program source:
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#include <gtk/gtk.h>
#include <gdk/gdk.h>
#include <libgimp/gimp.h>
#ifdef RCSID
static char rcsid[] = "$Id: nova.c,v 1.11.1.5 1997/06/08 14:01:19
takamori Exp $";
#endif
/* Some useful macros */
#if 0
#define DEBUG1 printf
#else
#define DEBUG1 dummy_printf
static void dummy_printf( char *fmt, ... ) {}
#endif
#define M_PI 3.14
#define ENTRY_WIDTH 40
#define SCALE_WIDTH 125
#define PREVIEW_SIZE 100
#define TILE_CACHE_SIZE 16
#define BOUNDS(a,x,y) ((a < x) ? x : ((a > y) ? y : a))
#define PREVIEW 0x1
#define CURSOR 0x2
#define ALL 0xf
#define PREVIEW_MASK GDK_EXPOSURE_MASK | \
GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON1_MOTION_MASK
typedef struct {
gint xcenter, ycenter;
gint color[3];
gint radius;
gint nspoke;
} NovaValues;
typedef struct {
gint run;
} NovaInterface;
typedef struct {
GtkObject *adjustment;
GtkWidget *entry;
gint constraint;
} NovaEntryScaleData;
typedef struct
{
GDrawable *drawable;
gint dwidth, dheight;
gint bpp;
GtkWidget *xentry, *yentry;
GtkWidget *preview;
gint pwidth, pheight;
gint cursor;
gint curx, cury; /* x,y of cursor in preview
*/
gint oldx, oldy;
gint in_call;
} NovaCenter;
/* Declare a local function.
*/
static void query (void);
static void run (gchar *name,
gint nparams,
GParam *param,
gint *nreturn_vals,
GParam **return_vals);
static gint nova_dialog ( GDrawable *drawable );
static GtkWidget * nova_center_create ( GDrawable *drawable );
static void nova_center_destroy ( GtkWidget *widget,
gpointer data );
static void nova_center_preview_init ( NovaCenter *center );
static void nova_center_draw ( NovaCenter *center, gint
update );
static void nova_center_entry_update ( GtkWidget *widget,
gpointer data );
static void nova_center_cursor_update ( NovaCenter *center );
static gint nova_center_preview_expose ( GtkWidget *widget,
GdkEvent *event );
static gint nova_center_preview_events ( GtkWidget *widget,
GdkEvent *event );
static void nova_int_entryscale_new ( GtkTable *table, gint x,
gint y,
gchar *caption, gint *intvar,
gint min, gint max, gint
constraint);
static void nova_close_callback (GtkWidget *widget,
gpointer data);
static void nova_ok_callback (GtkWidget *widget,
gpointer data);
static void nova_paired_entry_destroy_callback (GtkWidget *widget,
gpointer data);
static void nova_paired_int_scale_update (GtkAdjustment
*adjustment,
gpointer data);
static void nova_paired_int_entry_update (GtkWidget *widget,
gpointer data );
static void nova (GDrawable *drawable);
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static NovaValues pvals =
{
128, 128, /* xcenter, ycenter */
{ 90, 100, 256 }, /* color */
20, /* radius */
100 /* nspoke */
};
static NovaInterface pint =
{
FALSE /* run */
};
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, "xcenter", "X coordinates of the center of
supernova" },
{ PARAM_INT32, "ycenter", "Y coordinates of the center of
supernova" },
{ PARAM_COLOR, "color", "Color of supernova" },
{ PARAM_INT32, "radius", "Radius of supernova" },
{ PARAM_INT32, "nspoke", "Number of spokes" }
};
static GParamDef *return_vals = NULL;
static gint nargs = sizeof (args) / sizeof (args[0]);
static gint nreturn_vals = 0;
gchar *help_string =
" This plug-in produces an effect like a supernova burst. The"
" amount of the light effect is approximately in proportion to
1/r,"
" where r is the distance from the center of the star. It works
with"
" RGB*, GRAY* image.";
gimp_install_procedure ("plug_in_nova",
"Produce Supernova effect to the specified
drawable",
help_string,
"Eiichi Takamori",
"Eiichi Takamori",
"1997",
"<Image>/Filters/Effects/SuperNova",
"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;
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = PARAM_STATUS;
values[0].data.d_status = status;
/* Get the specified drawable */
drawable = gimp_drawable_get (param[2].data.d_drawable);
switch (run_mode)
{
case RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data ("plug_in_nova", &pvals);
/* First acquire information with a dialog */
if (! nova_dialog ( drawable ))
{
gimp_drawable_detach (drawable);
return;
}
break;
case RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 8)
status = STATUS_CALLING_ERROR;
if (status == STATUS_SUCCESS)
{
pvals.xcenter = param[3].data.d_int32;
pvals.ycenter = param[4].data.d_int32;
pvals.color[0] = param[5].data.d_color.red;
pvals.color[1] = param[5].data.d_color.green;
pvals.color[2] = param[5].data.d_color.blue;
pvals.radius = param[6].data.d_int32;
pvals.nspoke = param[7].data.d_int32;
}
if ((status == STATUS_SUCCESS) &&
pvals.radius <= 0 )
status = STATUS_CALLING_ERROR;
break;
case RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data ("plug_in_nova", &pvals);
break;
default:
break;
}
if (status == STATUS_SUCCESS)
{
/* Make sure that the drawable is gray or RGB color */
//if (gimp_drawable_color (drawable->id) || gimp_drawable_gray
(drawable->id))
if (gimp_drawable_is_rgb (drawable->id) ||
gimp_drawable_is_gray (drawable->id))
{
gimp_progress_init ("Rendering...");
gimp_tile_cache_ntiles (TILE_CACHE_SIZE);
nova (drawable);
if (run_mode != RUN_NONINTERACTIVE)
gimp_displays_flush ();
/* Store data */
if (run_mode == RUN_INTERACTIVE)
gimp_set_data ("plug_in_nova", &pvals, sizeof
(NovaValues));
}
else
{
/* gimp_message ("nova: cannot operate on indexed color
images"); */
status = STATUS_EXECUTION_ERROR;
}
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
/*******************/
/* */
/* Main Dialog */
/* */
/*******************/
static gint
nova_dialog ( GDrawable *drawable )
{
GtkWidget *dlg;
GtkWidget *frame;
GtkWidget *table;
GtkWidget *button;
GtkWidget *center_frame;
guchar *color_cube;
gchar **argv;
gint argc;
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("nova");
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
gdk_set_use_xshm (gimp_use_xshm ());
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 ());
#if 0
printf("Waiting... (pid %d)\n", getpid());
kill(getpid(), 19); /* SIGSTOP */
#endif
dlg = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (dlg), "SuperNova");
gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
(GtkSignalFunc) nova_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) nova_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 */
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);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, TRUE,
TRUE, 0);
table = gtk_table_new (6, 2, FALSE);
gtk_container_border_width (GTK_CONTAINER (table), 10);
gtk_container_add (GTK_CONTAINER (frame), table);
gtk_table_set_row_spacings (GTK_TABLE (table), 3);
gtk_table_set_col_spacings (GTK_TABLE (table), 10);
center_frame = nova_center_create ( drawable );
gtk_table_attach( GTK_TABLE(table), center_frame, 0, 2, 0, 1,
0, 0, 0, 0 );
nova_int_entryscale_new( GTK_TABLE (table), 0, 1,
"R value:", &pvals.color[0],
0, 255, TRUE );
nova_int_entryscale_new( GTK_TABLE (table), 0, 2,
"G value:", &pvals.color[1],
0, 255, TRUE );
nova_int_entryscale_new( GTK_TABLE (table), 0, 3,
"B value:", &pvals.color[2],
0, 255, TRUE );
nova_int_entryscale_new( GTK_TABLE (table), 0, 4,
"Radius:", &pvals.radius,
1, 100, FALSE );
nova_int_entryscale_new( GTK_TABLE (table), 0, 5,
"Spokes:", &pvals.nspoke,
1, 1024, TRUE );
gtk_widget_show (frame);
gtk_widget_show (table);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return pint.run;
}
/*** Dialog interface ***/
static void
nova_close_callback (GtkWidget *widget,
gpointer data)
{
gtk_main_quit ();
}
static void
nova_ok_callback (GtkWidget *widget,
gpointer data)
{
pint.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
/*=================================================================
CenterFrame
A frame that contains one preview and 2 entrys, used for
positioning
of the center of Nova.
==================================================================*/
/*
* Create new CenterFrame, and return it (GtkFrame).
*/
static GtkWidget *
nova_center_create ( GDrawable *drawable )
{
NovaCenter *center;
GtkWidget *frame;
GtkWidget *table;
GtkWidget *label;
GtkWidget *entry;
GtkWidget *pframe;
GtkWidget *preview;
gchar buf[256];
center = g_new( NovaCenter, 1 );
center->drawable = drawable;
center->dwidth = gimp_drawable_width(drawable->id );
center->dheight = gimp_drawable_height(drawable->id );
center->bpp = gimp_drawable_bpp(drawable->id);
if ( gimp_drawable_has_alpha(drawable->id) )
center->bpp--;
center->cursor = FALSE;
center->curx = 0;
center->cury = 0;
center->oldx = 0;
center->oldy = 0;
center->in_call = TRUE; /* to avoid side effects while
initialization */
frame = gtk_frame_new ( "Center of SuperNova" );
gtk_signal_connect( GTK_OBJECT( frame ), "destroy",
(GtkSignalFunc) nova_center_destroy,
center );
gtk_frame_set_shadow_type( GTK_FRAME(
frame ) ,GTK_SHADOW_ETCHED_IN );
gtk_container_border_width( GTK_CONTAINER( frame ), 10 );
table = gtk_table_new ( 2, 4, FALSE );
gtk_container_border_width (GTK_CONTAINER (table), 10);
gtk_container_add (GTK_CONTAINER (frame), table);
gtk_table_set_row_spacings (GTK_TABLE (table), 3);
gtk_table_set_col_spacings (GTK_TABLE (table), 5);
label = gtk_label_new ( "X: " );
gtk_misc_set_alignment( GTK_MISC(label), 0.0, 0.5 );
gtk_table_attach( GTK_TABLE(table), label, 0, 1, 0, 1, GTK_EXPAND |
GTK_FILL, GTK_FILL, 0, 0 );
gtk_widget_show(label);
center->xentry = entry = gtk_entry_new ();
gtk_object_set_user_data( GTK_OBJECT(entry), center );
gtk_signal_connect( GTK_OBJECT(entry), "changed",
(GtkSignalFunc) nova_center_entry_update,
&pvals.xcenter );
gtk_widget_set_usize( GTK_WIDGET(entry), ENTRY_WIDTH,0 );
gtk_table_attach( GTK_TABLE(table), entry, 1, 2, 0, 1, GTK_EXPAND |
GTK_FILL, GTK_FILL, 0, 0 );
gtk_widget_show(entry);
label = gtk_label_new ( "Y: " );
gtk_misc_set_alignment( GTK_MISC(label), 0.0, 0.5 );
gtk_table_attach( GTK_TABLE(table), label, 2, 3, 0, 1, GTK_EXPAND |
GTK_FILL, GTK_FILL, 0, 0 );
gtk_widget_show(label);
center->yentry = entry = gtk_entry_new ();
gtk_object_set_user_data( GTK_OBJECT(entry), center );
gtk_signal_connect( GTK_OBJECT(entry), "changed",
(GtkSignalFunc) nova_center_entry_update,
&pvals.ycenter );
gtk_widget_set_usize( GTK_WIDGET(entry), ENTRY_WIDTH, 0 );
gtk_table_attach( GTK_TABLE(table), entry, 3, 4, 0, 1, GTK_EXPAND |
GTK_FILL, GTK_FILL, 0, 0 );
gtk_widget_show(entry);
/* frame (shadow_in) that contains preview */
pframe = gtk_frame_new ( NULL );
gtk_frame_set_shadow_type( GTK_FRAME( pframe ), GTK_SHADOW_IN );
gtk_table_attach( GTK_TABLE(table), pframe, 0, 4, 1, 2, 0, 0, 0,
0 );
/* PREVIEW */
center->preview = preview = gtk_preview_new( center->bpp==3 ?
GTK_PREVIEW_COLOR : GTK_PREVIEW_GRAYSCALE );
gtk_object_set_user_data( GTK_OBJECT(preview), center );
gtk_widget_set_events( GTK_WIDGET(preview), PREVIEW_MASK );
gtk_signal_connect_after( GTK_OBJECT(preview), "expose_event",
(GtkSignalFunc) nova_center_preview_expose,
center );
gtk_signal_connect( GTK_OBJECT(preview), "event",
(GtkSignalFunc) nova_center_preview_events,
center );
gtk_container_add( GTK_CONTAINER( pframe ), center->preview );
/*
* Resize the greater one of dwidth and dheight to PREVIEW_SIZE
*/
if ( center->dwidth > center->dheight ) {
center->pheight = center->dheight * PREVIEW_SIZE / center->dwidth;
center->pwidth = PREVIEW_SIZE;
} else {
center->pwidth = center->dwidth * PREVIEW_SIZE / center->dheight;
center->pheight = PREVIEW_SIZE;
}
gtk_preview_size( GTK_PREVIEW( preview ), center->pwidth, center-
>pheight );
/* Draw the contents of preview, that is saved in the preview
widget */
nova_center_preview_init( center );
gtk_widget_show(preview);
gtk_widget_show( pframe );
gtk_widget_show( table );
gtk_widget_show( frame );
sprintf( buf, "%d", pvals.xcenter );
gtk_entry_set_text( GTK_ENTRY(center->xentry), buf );
sprintf( buf, "%d", pvals.ycenter );
gtk_entry_set_text( GTK_ENTRY(center->yentry), buf );
nova_center_cursor_update( center );
center->cursor = FALSE; /* Make sure that the cursor has not
been drawn */
center->in_call = FALSE; /* End of initialization */
DEBUG1("pvals center=%d,%d\n", pvals.xcenter, pvals.ycenter );
DEBUG1("center cur=%d,%d\n", center->curx, center->cury );
return frame;
}
static void
nova_center_destroy ( GtkWidget *widget,
gpointer data )
{
NovaCenter *center = data;
g_free( center );
}
static void render_preview ( GtkWidget *preview, GPixelRgn *srcrgn );
/*
* Initialize preview
* Draw the contents into the internal buffer of the preview widget
*/
static void
nova_center_preview_init ( NovaCenter *center )
{
GtkWidget *preview;
GPixelRgn src_rgn;
gint dwidth, dheight, pwidth, pheight, bpp;
preview = center->preview;
dwidth = center->dwidth;
dheight = center->dheight;
pwidth = center->pwidth;
pheight = center->pheight;
bpp = center->bpp;
gimp_pixel_rgn_init ( &src_rgn, center->drawable, 0, 0,
center->dwidth, center->dheight, FALSE,
FALSE );
render_preview( center->preview, &src_rgn );
}
/*====================================================================
==
Preview Rendering Util routine
======================================================================
=*/
#define CHECKWIDTH 4
#define LIGHTCHECK 192
#define DARKCHECK 128
#ifndef OPAQUE
#define OPAQUE 255
#endif
static void
render_preview ( GtkWidget *preview, GPixelRgn *srcrgn )
{
guchar *src_row, *dest_row, *src, *dest;
gint row, col;
gint dwidth, dheight, pwidth, pheight;
gint *src_col;
gint bpp, alpha, has_alpha, b;
guchar check;
dwidth = srcrgn->w;
dheight = srcrgn->h;
if( GTK_PREVIEW(preview)->buffer )
{
pwidth = GTK_PREVIEW(preview)->buffer_width;
pheight = GTK_PREVIEW(preview)->buffer_height;
}
else
{
pwidth = preview->requisition.width;
pheight = preview->requisition.height;
}
bpp = srcrgn->bpp;
alpha = bpp;
has_alpha = gimp_drawable_has_alpha( srcrgn->drawable->id );
if( has_alpha ) alpha--;
/* printf("render_preview: %d %d %d", bpp, alpha, has_alpha);
printf(" (%d %d %d %d)\n", dwidth, dheight, pwidth, pheight); */
src_row = g_new ( guchar, dwidth * bpp );
dest_row = g_new ( guchar, pwidth * bpp );
src_col = g_new ( gint, pwidth );
for ( col = 0; col < pwidth; col++ )
src_col[ col ] = ( col * dwidth / pwidth ) * bpp;
for ( row = 0; row < pheight; row++ )
{
gimp_pixel_rgn_get_row ( srcrgn, src_row,
0, row * dheight / pheight, dwidth );
dest = dest_row;
for ( col = 0; col < pwidth; col++ )
{
src = &src_row[ src_col[col] ];
if( !has_alpha || src[alpha] == OPAQUE )
{
/* no alpha channel or opaque -- simple way */
for ( b = 0; b < alpha; b++ )
dest[b] = src[b];
}
else
{
/* more or less transparent */
if( ( col % (CHECKWIDTH*2) < CHECKWIDTH ) ^
( row % (CHECKWIDTH*2) < CHECKWIDTH ) )
check = LIGHTCHECK;
else
check = DARKCHECK;
if ( src[alpha] == 0 )
{
/* full transparent -- check */
for ( b = 0; b < alpha; b++ )
dest[b] = check;
}
else
{
/* middlemost transparent -- mix check and src */
for ( b = 0; b < alpha; b++ )
dest[b] = ( src[b]*src[alpha] + check*(OPAQUE-src
[alpha]) ) / OPAQUE;
}
}
dest += alpha;
}
gtk_preview_draw_row( GTK_PREVIEW( preview ), dest_row,
0, row, pwidth );
}
g_free ( src_col );
g_free ( src_row );
g_free ( dest_row );
}
/*====================================================================
==
Preview Rendering Util routine End
======================================================================
=*/
/*
* Drawing CenterFrame
* if update & PREVIEW, draw preview
* if update & CURSOR, draw cross cursor
*/
static void
nova_center_draw ( NovaCenter *center, gint update )
{
if( update & PREVIEW )
{
center->cursor = FALSE;
DEBUG1("draw-preview\n");
}
if( update & CURSOR )
{
DEBUG1("draw-cursor %d old=%d,%d cur=%d,%d\n",
center->cursor, center->oldx, center->oldy, center-
>curx, center->cury);
gdk_gc_set_function ( center->preview->style->black_gc,
GDK_INVERT);
if( center->cursor )
{
gdk_draw_line ( center->preview->window,
center->preview->style->black_gc,
center->oldx, 1, center->oldx, center-
>pheight-1 );
gdk_draw_line ( center->preview->window,
center->preview->style->black_gc,
1, center->oldy, center->pwidth-1, center-
>oldy );
}
gdk_draw_line ( center->preview->window,
center->preview->style->black_gc,
center->curx, 1, center->curx, center->pheight-
1 );
gdk_draw_line ( center->preview->window,
center->preview->style->black_gc,
1, center->cury, center->pwidth-1, center-
>cury );
/* current position of cursor is updated */
center->oldx = center->curx;
center->oldy = center->cury;
center->cursor = TRUE;
gdk_gc_set_function ( center->preview->style->black_gc,
GDK_COPY);
}
}
/*
* CenterFrame entry callback
*/
static void
nova_center_entry_update ( GtkWidget *widget,
gpointer data )
{
NovaCenter *center;
gint *val, new_val;
DEBUG1("entry\n");
val = data;
new_val = atoi ( gtk_entry_get_text( GTK_ENTRY(widget) ) );
if( *val != new_val )
{
*val = new_val;
center = gtk_object_get_user_data( GTK_OBJECT(widget) );
DEBUG1("entry:newval in_call=%d\n", center->in_call );
if( !center->in_call )
{
nova_center_cursor_update( center );
nova_center_draw ( center, CURSOR );
}
}
}
/*
* Update the cross cursor's coordinates accoding to pvals.[xy]
center
* but not redraw it
*/
static void
nova_center_cursor_update ( NovaCenter *center )
{
center->curx = pvals.xcenter * center->pwidth / center->dwidth;
center->cury = pvals.ycenter * center->pheight / center->dheight;
if( center->curx < 0 ) center->curx = 0;
else if( center->curx >= center->pwidth ) center->curx = center-
>pwidth-1;
if( center->cury < 0 ) center->cury = 0;
else if( center->cury >= center->pheight) center->cury = center-
>pheight-1;
}
/*
* Handle the expose event on the preview
*/
static gint
nova_center_preview_expose( GtkWidget *widget,
GdkEvent *event )
{
NovaCenter *center;
center = gtk_object_get_user_data( GTK_OBJECT(widget) );
nova_center_draw( center, ALL );
return FALSE;
}
/*
* Handle other events on the preview
*/
static gint
nova_center_preview_events ( GtkWidget *widget,
GdkEvent *event )
{
NovaCenter *center;
GdkEventButton *bevent;
GdkEventMotion *mevent;
gchar buf[256];
center = gtk_object_get_user_data ( GTK_OBJECT(widget) );
switch (event->type)
{
case GDK_EXPOSE:
break;
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
center->curx = (gint)bevent->x;
center->cury = (gint)bevent->y;
goto mouse;
case GDK_MOTION_NOTIFY:
mevent = (GdkEventMotion *) event;
if ( !mevent->state ) break;
center->curx = (gint)mevent->x;
center->cury = (gint)mevent->y;
mouse:
nova_center_draw( center, CURSOR );
center->in_call = TRUE;
sprintf(buf, "%d", center->curx * center->dwidth / center-
>pwidth );
gtk_entry_set_text( GTK_ENTRY(center->xentry), buf );
sprintf(buf, "%d", center->cury * center->dheight / center-
>pheight );
gtk_entry_set_text( GTK_ENTRY(center->yentry), buf );
center->in_call = FALSE;
break;
default:
break;
}
return FALSE;
}
/*===================================================================
Entry - Scale Pair
====================================================================*/
/*********************************************************************
**/
/*
*/
/* Create new entry-scale pair with label. (int)
*/
/* 1 row and 2 cols of table are needed.
*/
/*
*/
/* `x' and `y' means starting row and col in `table'.
*/
/*
*/
/* `caption' is label string.
*/
/*
*/
/* `min', `max' are boundary of scale.
*/
/*
*/
/* `constraint' means whether value of *intvar should be
constraint */
/* by scale adjustment, e.g. between `min' and `max'.
*/
/*
*/
/*********************************************************************
**/
static void
nova_int_entryscale_new ( GtkTable *table, gint x, gint y,
gchar *caption, gint *intvar,
gint min, gint max, gint constraint)
{
GtkWidget *hbox;
GtkWidget *label;
GtkWidget *entry;
GtkWidget *scale;
GtkObject *adjustment;
NovaEntryScaleData *userdata;
gchar buffer[256];
label = gtk_label_new (caption);
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
adjustment = gtk_adjustment_new ( *intvar, min, max, 1.0, 1.0, 0.0);
scale = gtk_hscale_new ( GTK_ADJUSTMENT(adjustment) );
gtk_widget_set_usize (scale, SCALE_WIDTH, 0);
gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE);
entry = gtk_entry_new ();
gtk_widget_set_usize (entry, ENTRY_WIDTH, 0);
sprintf( buffer, "%d", *intvar );
gtk_entry_set_text( GTK_ENTRY (entry), buffer );
userdata = g_new ( NovaEntryScaleData, 1 );
userdata->entry = entry;
userdata->adjustment = adjustment;
userdata->constraint = constraint;
gtk_object_set_user_data (GTK_OBJECT(entry), userdata);
gtk_object_set_user_data (GTK_OBJECT(adjustment), userdata);
gtk_signal_connect (GTK_OBJECT (entry), "changed",
(GtkSignalFunc) nova_paired_int_entry_update,
intvar);
gtk_signal_connect ( adjustment, "value_changed",
(GtkSignalFunc) nova_paired_int_scale_update,
intvar);
gtk_signal_connect ( GTK_OBJECT( entry ), "destroy",
(GtkSignalFunc)
nova_paired_entry_destroy_callback,
userdata );
hbox = gtk_hbox_new ( FALSE, 5 );
gtk_box_pack_start (GTK_BOX (hbox), scale, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX (hbox), entry, FALSE, TRUE, 0);
gtk_table_attach (GTK_TABLE (table), label, x, x+1, y, y+1,
GTK_FILL, GTK_FILL, 0, 0);
gtk_table_attach (GTK_TABLE (table), hbox, x+1, x+2, y, y+1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0,
0);
gtk_widget_show (label);
gtk_widget_show (entry);
gtk_widget_show (scale);
gtk_widget_show (hbox);
}
/*
when destroyed, userdata is destroyed too
*/
static void
nova_paired_entry_destroy_callback (GtkWidget *widget,
gpointer data)
{
NovaEntryScaleData *userdata;
userdata = data;
g_free ( userdata );
}
/* scale callback (int) */
/* ==================== */
static void
nova_paired_int_scale_update (GtkAdjustment *adjustment,
gpointer data)
{
NovaEntryScaleData *userdata;
GtkEntry *entry;
gchar buffer[256];
gint *val, new_val;
val = data;
new_val = (gint) adjustment->value;
*val = new_val;
userdata = gtk_object_get_user_data (GTK_OBJECT (adjustment));
entry = GTK_ENTRY( userdata->entry );
sprintf (buffer, "%d", (int) new_val );
/* avoid infinite loop (scale, entry, scale, entry ...) */
gtk_signal_handler_block_by_data ( GTK_OBJECT(entry), data );
gtk_entry_set_text ( entry, buffer);
gtk_signal_handler_unblock_by_data ( GTK_OBJECT(entry), data );
}
/*
entry callback (int)
*/
static void
nova_paired_int_entry_update (GtkWidget *widget,
gpointer data)
{
NovaEntryScaleData *userdata;
GtkAdjustment *adjustment;
int new_val, constraint_val;
int *val;
val = data;
new_val = atoi (gtk_entry_get_text (GTK_ENTRY (widget)));
*val = new_val;
userdata = gtk_object_get_user_data (GTK_OBJECT (widget));
adjustment = GTK_ADJUSTMENT( userdata->adjustment );
constraint_val = new_val;
if ( constraint_val < adjustment->lower )
constraint_val = (int)adjustment->lower;
if ( constraint_val > adjustment->upper )
constraint_val = (int)adjustment->upper;
if ( userdata->constraint )
*val = constraint_val;
else
*val = new_val;
adjustment->value = constraint_val;
gtk_signal_handler_block_by_data ( GTK_OBJECT(adjustment), data );
gtk_signal_emit_by_name ( GTK_OBJECT(adjustment), "value_changed");
gtk_signal_handler_unblock_by_data ( GTK_OBJECT(adjustment), data );
}
/*
################################################################
## ##
## Main Calculation ##
## ##
################################################################
*/
static double gauss()
{
double sum=0;
int i;
for(i=0; i<6; i++)
sum+=(double)rand()/RAND_MAX;
return sum/6;
}
static void
nova (GDrawable *drawable)
{
GPixelRgn src_rgn, dest_rgn;
gpointer pr;
guchar *src_row, *dest_row;
guchar *src, *dest;
gint x1, y1, x2, y2;
gint row, col;
gint x, y;
gint alpha, has_alpha, bpp;
gint progress, max_progress;
/****************/
gint xc, yc; /* center of image */
gdouble u, v;
gdouble l, l0;
gdouble w, w1, c;
gdouble *spoke;
gdouble nova_alpha;
gdouble src_alpha;
gdouble new_alpha;
gdouble compl_ratio;
gdouble ratio;
gint i;
gint color[4];
srand(time(NULL));
spoke = g_new( gdouble, pvals.nspoke );
for( i=0; i<pvals.nspoke; i++ )
spoke[i] = gauss();
gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
/*
xc = (x1+x2)/2;
yc = (y1+y2)/2; */
xc = pvals.xcenter;
yc = pvals.ycenter;
l0 = (x2-xc)/4+1; /* standard length */
bpp = gimp_drawable_bpp (drawable->id);
has_alpha = gimp_drawable_has_alpha (drawable->id);
alpha = (has_alpha) ? bpp - 1 : bpp;
gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, x2-x1, y2-y1,
FALSE, FALSE);
gimp_pixel_rgn_init (&dest_rgn, drawable, x1, y1, x2-x1, y2-y1,
TRUE, TRUE);
/* Initialize progress */
progress = 0;
max_progress = (x2 - x1) * (y2 - y1);
for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
pr != NULL; pr = gimp_pixel_rgns_process (pr))
{
src_row = src_rgn.data;
dest_row = dest_rgn.data;
for ( row = 0, y = src_rgn.y; row < src_rgn.h; row++, y++)
{
src = src_row;
dest = dest_row;
for ( col = 0, x = src_rgn.x; col < src_rgn.w; col++, x++)
{
u = (gdouble) (x-xc) / pvals.radius;
v = (gdouble) (y-yc) / pvals.radius;
l = sqrt( u*u + v*v );
/* This algorithm is still under construction. */
c = (atan2 (u, v) / (2 * M_PI) + .51) * pvals.nspoke;
i = (int) floor (c);
c -= i;
i %= pvals.nspoke;
w1 = spoke[i] * (1 - c) + spoke[(i + 1) % pvals.nspoke]
* c;
w1 = w1 * w1;
w = 1/(l+0.001)*0.9;
nova_alpha = BOUNDS (w, 0.0, 1.0);
if (has_alpha)
{
src_alpha = (gdouble) src[alpha] / 255.0;
new_alpha = src_alpha + (1.0 - src_alpha) *
nova_alpha;
if (new_alpha != 0.0)
ratio = nova_alpha / new_alpha;
else
ratio = 0.0;
}
else
ratio = nova_alpha;
compl_ratio = 1.0 - ratio;
for (i = 0; i < alpha; i++)
{
if (w > 1.0)
color[i] = BOUNDS (pvals.color[i] * w, 0, 255);
else
color[i] = src[i] * compl_ratio + pvals.color[i]
* ratio;
c = BOUNDS (w1 * w, 0, 1);
color[i] = color[i] + 255 * c;
dest[i]= BOUNDS (color[i], 0, 255);
}
if (has_alpha)
dest[alpha] = new_alpha * 255.0;
src += src_rgn.bpp;
dest += dest_rgn.bpp;
}
src_row += src_rgn.rowstride;
dest_row += dest_rgn.rowstride;
}
/* Update progress */
progress += src_rgn.w * src_rgn.h;
gimp_progress_update ((double) progress / (double)
max_progress);
}
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->id, TRUE);
gimp_drawable_update (drawable->id, x1, y1, (x2 - x1), (y2 - y1));
g_free( spoke );
}