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gimp/plug-ins/common/flarefx.c

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/*
* This is the FlareFX plug-in for the GIMP 0.99
* Version 1.04
*
* Copyright (C) 1997-1998 Karl-Johan Andersson (t96kja@student.tdb.uu.se)
*
* 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.
*
*/
/*
* Please send any comments or suggestions to me,
* Karl-Johan Andersson (t96kja@student.tdb.uu.se)
*
* TODO:
* - add "streaks" from lightsource
* - improve the user interface
* - speed it up
* - more flare types, more control (color, size, intensity...)
*
* Missing something? - please contact me!
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "libgimp/gimp.h"
#include "gtk/gtk.h"
/* --- Defines --- */
#define ENTRY_WIDTH 75
#define PREVIEW_SIZE 100
#define PREVIEW_MASK GDK_EXPOSURE_MASK | \
GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON1_MOTION_MASK
#define PREVIEW 0x1
#define CURSOR 0x2
#define ALL 0xf
#if 0
#define DEBUG1 printf
#else
#define DEBUG1 dummy_printf
static void dummy_printf( char *fmt, ... ) {}
#endif
/* --- Typedefs --- */
typedef struct {
gint posx;
gint posy;
} FlareValues;
typedef struct {
gint run;
} FlareInterface;
typedef struct RGBFLOAT {
gfloat r;
gfloat g;
gfloat b;
} RGBfloat;
typedef struct REFLECT {
RGBfloat ccol;
gfloat size;
gint xp;
gint yp;
gint type;
} Reflect;
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;
} FlareCenter;
/* --- Declare local functions --- */
static void query (void);
static void run (char *name,
int nparams,
GParam *param,
int *nreturn_vals,
GParam **return_vals);
static gint flare_dialog ( GDrawable *drawable );
static GtkWidget * flare_center_create ( GDrawable *drawable );
static void flare_center_destroy ( GtkWidget *widget,
gpointer data );
static void flare_center_preview_init ( FlareCenter *center );
static void flare_center_draw ( FlareCenter *center, gint update );
static void flare_center_entry_update ( GtkWidget *widget,
gpointer data );
static void flare_center_cursor_update ( FlareCenter *center );
static gint flare_center_preview_expose ( GtkWidget *widget,
GdkEvent *event );
static gint flare_center_preview_events ( GtkWidget *widget,
GdkEvent *event );
static void flare_close_callback (GtkWidget *widget, gpointer data);
static void flare_ok_callback (GtkWidget *widget, gpointer data);
static void FlareFX (GDrawable *drawable);
void mcolor (guchar *s, gfloat h);
void mglow (guchar *s, gfloat h);
void minner (guchar *s, gfloat h);
void mouter (guchar *s, gfloat h);
void mhalo (guchar *s, gfloat h);
void initref (gint sx, gint sy, gint width, gint height, gint matt);
void fixpix (guchar *data, float procent, RGBfloat colpro);
void mrt1 (guchar *s, gint i, gint col, gint row);
void mrt2 (guchar *s, gint i, gint col, gint row);
void mrt3 (guchar *s, gint i, gint col, gint row);
void mrt4 (guchar *s, gint i, gint col, gint row);
/* --- Variables --- */
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static FlareValues fvals =
{
128, 128 /* posx, posy */
};
static FlareInterface fint =
{
FALSE /* run */
};
gfloat scolor, sglow, sinner, souter; /* size */
gfloat shalo;
gint xs, ys;
gint numref;
RGBfloat color, glow, inner, outer, halo;
Reflect ref1[19];
/* --- Functions --- */
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, "posx", "X-position" },
{ PARAM_INT32, "posy", "Y-position" }
};
static GParamDef *return_vals = NULL;
static int nargs = sizeof (args) / sizeof (args[0]);
static int nreturn_vals = 0;
gimp_install_procedure ("plug_in_flarefx",
"Add lens flare effetcs",
"More here later",
"Karl-Johan Andersson", /* Author */
"Karl-Johan Andersson", /* Copyright */
"1998",
"<Image>/Filters/Light Effects/FlareFX",
"RGB*",
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_flarefx", &fvals);
/* First acquire information with a dialog */
if (! flare_dialog ( drawable ))
{
gimp_drawable_detach (drawable);
return;
}
break;
case RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 5)
status = STATUS_CALLING_ERROR;
if (status == STATUS_SUCCESS)
{
fvals.posx = (gint) param[3].data.d_int32;
fvals.posy = (gint) param[4].data.d_int32;
}
break;
case RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data ("plug_in_flarefx", &fvals);
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))
{
gimp_progress_init ("Render flare...");
gimp_tile_cache_ntiles (2 * (drawable->width / gimp_tile_width () + 1));
FlareFX (drawable);
if (run_mode != RUN_NONINTERACTIVE)
gimp_displays_flush ();
/* Store data */
if (run_mode == RUN_INTERACTIVE)
gimp_set_data ("plug_in_flarefx", &fvals, sizeof (FlareValues));
}
else
{
/* gimp_message ("FlareFX: cannot operate on indexed color images"); */
status = STATUS_EXECUTION_ERROR;
}
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
static gint flare_dialog( GDrawable *drawable )
{
GtkWidget *dlg;
GtkWidget *frame;
GtkWidget *button;
guchar *color_cube;
gchar **argv;
gint argc;
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("flarefx");
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), "FlareFX");
gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
(GtkSignalFunc) flare_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) flare_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 = flare_center_create ( drawable );
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);
gtk_widget_show (frame);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return fint.run;
}
/* --- Interface functions --- */
static void flare_close_callback (GtkWidget *widget, gpointer data)
{
gtk_main_quit ();
}
static void flare_ok_callback (GtkWidget *widget, gpointer data)
{
fint.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
/* --- Filter functions --- */
static void FlareFX (GDrawable *drawable)
{
GPixelRgn srcPR, destPR;
gint width, height;
gint bytes;
guchar *dest, *d;
guchar *cur_row, *s;
gint row, col, i;
gint x1, y1, x2, y2;
gint matt;
gfloat hyp;
/* Get the input area. This is the bounding box of the selection in
* the image (or the entire image if there is no selection). Only
* operating on the input area is simply an optimization. It doesn't
* need to be done for correct operation. (It simply makes it go
* faster, since fewer pixels need to be operated on).
*/
gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
/* Get the size of the input image. (This will/must be the same
* as the size of the output image.
*/
width = drawable->width;
height = drawable->height;
bytes = drawable->bpp;
matt = width;
/* allocate row buffers */
cur_row = (guchar *) malloc ((x2 - x1) * bytes);
dest = (guchar *) malloc ((x2 - x1) * bytes);
/* initialize the pixel regions */
gimp_pixel_rgn_init (&srcPR, drawable, 0, 0, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable, 0, 0, width, height, TRUE, TRUE);
xs = fvals.posx;
ys = fvals.posy;
scolor = (gfloat)matt * 0.0375;
sglow = (gfloat)matt * 0.078125;
sinner = (gfloat)matt * 0.1796875;
souter = (gfloat)matt * 0.3359375;
shalo = (gfloat)matt * 0.084375;
color.r = 239.0/255.0; color.g = 239.0/255.0; color.b = 239.0/255.0;
glow.r = 245.0/255.0; glow.g = 245.0/255.0; glow.b = 245.0/255.0;
inner.r = 255.0/255.0; inner.g = 38.0/255.0; inner.b = 43.0/255.0;
outer.r = 69.0/255.0; outer.g = 59.0/255.0; outer.b = 64.0/255.0;
halo.r = 80.0/255.0; halo.g = 15.0/255.0; halo.b = 4.0/255.0;
initref (xs, ys, width, height, matt);
/* Loop through the rows */
for (row = y1; row < y2; row++) /* y-coord */
{
gimp_pixel_rgn_get_row (&srcPR, cur_row, x1, row, x2-x1);
d = dest;
s = cur_row;
for (col = x1; col < x2; col++) /* x-coord */
{
hyp = hypot (col-xs, row-ys);
mcolor (s, hyp); /* make color */
mglow (s, hyp); /* make glow */
minner (s, hyp); /* make inner */
mouter (s, hyp); /* make outer */
mhalo (s, hyp); /* make halo */
for (i = 0; i < numref; i++) {
switch (ref1[i].type) {
case 1:
mrt1 (s, i, col, row);
break;
case 2:
mrt2 (s, i, col, row);
break;
case 3:
mrt3 (s, i, col, row);
break;
case 4:
mrt4 (s, i, col, row);
break;
}
}
s+=bytes;
}
/* store the dest */
gimp_pixel_rgn_set_row (&destPR, cur_row, x1, row, (x2 - x1));
if ((row % 5) == 0)
gimp_progress_update ((double) row / (double) (y2 - y1));
}
/* update the textured region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->id, TRUE);
gimp_drawable_update (drawable->id, x1, y1, (x2 - x1), (y2 - y1));
free (cur_row);
free (dest);
}
void mcolor (guchar *s, gfloat h)
{
static gfloat procent;
procent = scolor - h;
procent/=scolor;
if (procent > 0.0) {
procent*=procent;
fixpix (s, procent, color);
}
}
void mglow (guchar *s, gfloat h)
{
static gfloat procent;
procent = sglow - h;
procent/=sglow;
if (procent > 0.0) {
procent*=procent;
fixpix (s, procent, glow);
}
}
void minner (guchar *s, gfloat h)
{
static gfloat procent;
procent = sinner - h;
procent/=sinner;
if (procent > 0.0) {
procent*=procent;
fixpix (s, procent, inner);
}
}
void mouter (guchar *s, gfloat h)
{
static gfloat procent;
procent = souter - h;
procent/=souter;
if (procent > 0.0)
fixpix (s, procent, outer);
}
void mhalo (guchar *s, gfloat h)
{
static gfloat procent;
procent = h - shalo;
procent/=(shalo*0.07);
procent = fabs (procent);
if (procent < 1.0)
fixpix (s, 1.0 - procent, halo);
}
void fixpix (guchar *data, float procent, RGBfloat colpro)
{
data[0] = data[0] + (255 - data[0]) * procent * colpro.r;
data[1] = data[1] + (255 - data[1]) * procent * colpro.g;
data[2] = data[2] + (255 - data[2]) * procent * colpro.b;
}
void initref (gint sx, gint sy, gint width, gint height, gint matt)
{
gint xh, yh, dx, dy;
xh = width / 2; yh = height / 2;
dx = xh - sx; dy = yh - sy;
numref = 19;
ref1[0].type=1; ref1[0].size=(gfloat)matt*0.027;
ref1[0].xp=0.6699*dx+xh; ref1[0].yp=0.6699*dy+yh;
ref1[0].ccol.r=0.0; ref1[0].ccol.g=14.0/255.0; ref1[0].ccol.b=113.0/255.0;
ref1[1].type=1; ref1[1].size=(gfloat)matt*0.01;
ref1[1].xp=0.2692*dx+xh; ref1[1].yp=0.2692*dy+yh;
ref1[1].ccol.r=90.0/255.0; ref1[1].ccol.g=181.0/255.0; ref1[1].ccol.b=142.0/255.0;
ref1[2].type=1; ref1[2].size=(gfloat)matt*0.005;
ref1[2].xp=-0.0112*dx+xh; ref1[2].yp=-0.0112*dy+yh;
ref1[2].ccol.r=56.0/255.0; ref1[2].ccol.g=140.0/255.0; ref1[2].ccol.b=106.0/255.0;
ref1[3].type=2; ref1[3].size=(gfloat)matt*0.031;
ref1[3].xp=0.6490*dx+xh; ref1[3].yp=0.6490*dy+yh;
ref1[3].ccol.r=9.0/255.0; ref1[3].ccol.g=29.0/255.0; ref1[3].ccol.b=19.0/255.0;
ref1[4].type=2; ref1[4].size=(gfloat)matt*0.015;
ref1[4].xp=0.4696*dx+xh; ref1[4].yp=0.4696*dy+yh;
ref1[4].ccol.r=24.0/255.0; ref1[4].ccol.g=14.0/255.0; ref1[4].ccol.b=0.0;
ref1[5].type=2; ref1[5].size=(gfloat)matt*0.037;
ref1[5].xp=0.4087*dx+xh; ref1[5].yp=0.4087*dy+yh;
ref1[5].ccol.r=24.0/255.0; ref1[5].ccol.g=14.0/255.0; ref1[5].ccol.b=0.0;
ref1[6].type=2; ref1[6].size=(gfloat)matt*0.022;
ref1[6].xp=-0.2003*dx+xh; ref1[6].yp=-0.2003*dy+yh;
ref1[6].ccol.r=42.0/255.0; ref1[6].ccol.g=19.0/255.0; ref1[6].ccol.b=0.0;
ref1[7].type=2; ref1[7].size=(gfloat)matt*0.025;
ref1[7].xp=-0.4103*dx+xh; ref1[7].yp=-0.4103*dy+yh;
ref1[7].ccol.b=17.0/255.0; ref1[7].ccol.g=9.0/255.0; ref1[7].ccol.r=0.0;
ref1[8].type=2; ref1[8].size=(gfloat)matt*0.058;
ref1[8].xp=-0.4503*dx+xh; ref1[8].yp=-0.4503*dy+yh;
ref1[8].ccol.b=10.0/255.0; ref1[8].ccol.g=4.0/255.0; ref1[8].ccol.r=0.0;
ref1[9].type=2; ref1[9].size=(gfloat)matt*0.017;
ref1[9].xp=-0.5112*dx+xh; ref1[9].yp=-0.5112*dy+yh;
ref1[9].ccol.r=5.0/255.0; ref1[9].ccol.g=5.0/255.0; ref1[9].ccol.b=14.0/255.0;
ref1[10].type=2; ref1[10].size=(gfloat)matt*0.2;
ref1[10].xp=-1.496*dx+xh; ref1[10].yp=-1.496*dy+yh;
ref1[10].ccol.r=9.0/255.0; ref1[10].ccol.g=4.0/255.0; ref1[10].ccol.b=0.0;
ref1[11].type=2; ref1[11].size=(gfloat)matt*0.5;
ref1[11].xp=-1.496*dx+xh; ref1[11].yp=-1.496*dy+yh;
ref1[11].ccol.r=9.0/255.0; ref1[11].ccol.g=4.0/255.0; ref1[11].ccol.b=0.0;
ref1[12].type=3; ref1[12].size=(gfloat)matt*0.075;
ref1[12].xp=0.4487*dx+xh; ref1[12].yp=0.4487*dy+yh;
ref1[12].ccol.r=34.0/255.0; ref1[12].ccol.g=19.0/255.0; ref1[12].ccol.b=0.0;
ref1[13].type=3; ref1[13].size=(gfloat)matt*0.1;
ref1[13].xp=dx+xh; ref1[13].yp=dy+yh;
ref1[13].ccol.r=14.0/255.0; ref1[13].ccol.g=26.0/255.0; ref1[13].ccol.b=0.0;
ref1[14].type=3; ref1[14].size=(gfloat)matt*0.039;
ref1[14].xp=-1.301*dx+xh; ref1[14].yp=-1.301*dy+yh;
ref1[14].ccol.r=10.0/255.0; ref1[14].ccol.g=25.0/255.0; ref1[14].ccol.b=13.0/255.0;
ref1[15].type=4; ref1[15].size=(gfloat)matt*0.19;
ref1[15].xp=1.309*dx+xh; ref1[15].yp=1.309*dy+yh;
ref1[15].ccol.r=9.0/255.0; ref1[15].ccol.g=0.0; ref1[15].ccol.b=17.0/255.0;
ref1[16].type=4; ref1[16].size=(gfloat)matt*0.195;
ref1[16].xp=1.309*dx+xh; ref1[16].yp=1.309*dy+yh;
ref1[16].ccol.r=9.0/255.0; ref1[16].ccol.g=16.0/255.0; ref1[16].ccol.b=5.0/255.0;
ref1[17].type=4; ref1[17].size=(gfloat)matt*0.20;
ref1[17].xp=1.309*dx+xh; ref1[17].yp=1.309*dy+yh;
ref1[17].ccol.r=17.0/255.0; ref1[17].ccol.g=4.0/255.0; ref1[17].ccol.b=0.0;
ref1[18].type=4; ref1[18].size=(gfloat)matt*0.038;
ref1[18].xp=-1.301*dx+xh; ref1[18].yp=-1.301*dy+yh;
ref1[18].ccol.r=17.0/255.0; ref1[18].ccol.g=4.0/255.0; ref1[18].ccol.b=0.0;
}
void mrt1 (guchar *s, gint i, gint col, gint row)
{
static gfloat procent;
procent = ref1[i].size - hypot (ref1[i].xp - col, ref1[i].yp - row);
procent/=ref1[i].size;
if (procent > 0.0) {
procent*=procent;
fixpix (s, procent, ref1[i].ccol);
}
}
void mrt2 (guchar *s, gint i, gint col, gint row)
{
static gfloat procent;
procent = ref1[i].size - hypot (ref1[i].xp - col, ref1[i].yp - row);
procent/=(ref1[i].size * 0.15);
if (procent > 0.0) {
if (procent > 1.0) procent = 1.0;
fixpix (s, procent, ref1[i].ccol);
}
}
void mrt3 (guchar *s, gint i, gint col, gint row)
{
static gfloat procent;
procent = ref1[i].size - hypot (ref1[i].xp - col, ref1[i].yp - row);
procent/=(ref1[i].size * 0.12);
if (procent > 0.0) {
if (procent > 1.0) procent = 1.0 - (procent * 0.12);
fixpix (s, procent, ref1[i].ccol);
}
}
void mrt4 (guchar *s, gint i, gint col, gint row)
{
static gfloat procent;
procent = hypot (ref1[i].xp - col, ref1[i].yp - row) - ref1[i].size;
procent/=(ref1[i].size*0.04);
procent = fabs (procent);
if (procent < 1.0)
fixpix(s, 1.0 - procent, ref1[i].ccol);
}
/*=================================================================
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 *
flare_center_create ( GDrawable *drawable )
{
FlareCenter *center;
GtkWidget *frame;
GtkWidget *table;
GtkWidget *label;
GtkWidget *entry;
GtkWidget *pframe;
GtkWidget *preview;
gchar buf[256];
center = g_new( FlareCenter, 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 FlareFX" );
gtk_signal_connect( GTK_OBJECT( frame ), "destroy",
(GtkSignalFunc) flare_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) flare_center_entry_update,
&fvals.posx );
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) flare_center_entry_update,
&fvals.posy );
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) flare_center_preview_expose,
center );
gtk_signal_connect( GTK_OBJECT(preview), "event",
(GtkSignalFunc) flare_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 */
flare_center_preview_init( center );
gtk_widget_show(preview);
gtk_widget_show( pframe );
gtk_widget_show( table );
gtk_widget_show( frame );
sprintf( buf, "%d", fvals.posx );
gtk_entry_set_text( GTK_ENTRY(center->xentry), buf );
sprintf( buf, "%d", fvals.posy );
gtk_entry_set_text( GTK_ENTRY(center->yentry), buf );
flare_center_cursor_update( center );
center->cursor = FALSE; /* Make sure that the cursor has not been drawn */
center->in_call = FALSE; /* End of initialization */
DEBUG1("fvals center=%d,%d\n", fvals.posx, fvals.posy );
DEBUG1("center cur=%d,%d\n", center->curx, center->cury );
return frame;
}
static void
flare_center_destroy ( GtkWidget *widget,
gpointer data )
{
FlareCenter *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
flare_center_preview_init ( FlareCenter *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
flare_center_draw ( FlareCenter *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
flare_center_entry_update ( GtkWidget *widget,
gpointer data )
{
FlareCenter *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 )
{
flare_center_cursor_update( center );
flare_center_draw ( center, CURSOR );
}
}
}
/*
* Update the cross cursor's coordinates accoding to pvals.[xy]center
* but not redraw it
*/
static void
flare_center_cursor_update ( FlareCenter *center )
{
center->curx = fvals.posx * center->pwidth / center->dwidth;
center->cury = fvals.posy * 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
flare_center_preview_expose( GtkWidget *widget,
GdkEvent *event )
{
FlareCenter *center;
center = gtk_object_get_user_data( GTK_OBJECT(widget) );
flare_center_draw( center, ALL );
return FALSE;
}
/*
* Handle other events on the preview
*/
static gint
flare_center_preview_events ( GtkWidget *widget,
GdkEvent *event )
{
FlareCenter *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 = bevent->x;
center->cury = bevent->y;
goto mouse;
case GDK_MOTION_NOTIFY:
mevent = (GdkEventMotion *) event;
if ( !mevent->state ) break;
center->curx = mevent->x;
center->cury = mevent->y;
mouse:
flare_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;
}
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