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gimp/plug-ins/lic.c
Elliot Lee 32cefec8f7 Initial revision
1997-11-24 22:05:25 +00:00

1433 lines
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/*********************************************************************************/
/* LIC 0.14 -- image filter plug-in for The Gimp program */
/* Copyright (C) 1996 Tom Bech */
/*===============================================================================*/
/* E-mail: tomb@gimp.org */
/* You can contact the original The Gimp authors at gimp@xcf.berkeley.edu */
/*===============================================================================*/
/* 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. */
/*===============================================================================*/
/* In other words, you can't sue me for whatever happens while using this ;) */
/*********************************************************************************/
/* Changes (post 0.10): */
/* -> 0.11: Fixed a bug in the convolution kernels (Tom). */
/* -> 0.12: Added Quartic's bilinear interpolation stuff (Tom). */
/* -> 0.13 Changed some UI stuff causing trouble with the 0.60 release, added */
/* the (GIMP) tags and changed random() calls to rand() (Tom) */
/* -> 0.14 Ported to 0.99.11 (Tom) */
/*********************************************************************************/
/* This plug-in implements the Line Integral Convolution (LIC) as described in */
/* Cabral et al. "Imaging vector fields using line integral convolution" in the */
/* Proceedings of ACM SIGGRAPH 93. Publ. by ACM, New York, NY, USA. p. 263-270. */
/* Some of the code is based on code by Steinar Haugen (thanks!), the Perlin */
/* noise function is practically ripped as is :) */
/*********************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <gdk/gdk.h>
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
/************/
/* Typedefs */
/************/
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#define CHECKBOUNDS(x,y) (x>=0 && y>=0 && x<width && y<height)
#define EPSILON 1.0e-5
#define numx 40 /* Pseudo-random vector grid size */
#define numy 40
#define stepx 0.5
#define stepy 0.5
#define TILE_CACHE_SIZE 16
/***********************/
/* Some useful structs */
/***********************/
typedef struct
{
gdouble r,g,b,a;
} rgbpixel;
/*****************************/
/* Global variables and such */
/*****************************/
rgbpixel white = {1.0,1.0,1.0};
rgbpixel black = {0.0,0.0,0.0};
rgbpixel background;
gdouble G[numx][numy][2];
typedef struct {
glong filtlen,noisemag,intsteps,minv,maxv;
gboolean create_new_image;
guchar effect_channel;
guchar effect_operator;
guchar effect_convolve;
gint32 effect_image_id;
} LicValues;
LicValues licvals;
gdouble l=10.0,dx=2.0,dy=2.0,minv=-2.5,maxv=2.5,isteps=20.0;
GDrawable *input_drawable,*output_drawable;
GPixelRgn source_region,dest_region;
gint imgtype,width,height,in_channels,out_channels;
gint border_x1,border_y1,border_x2,border_y2;
glong maxcounter;
guchar *scalarfield;
GtkWidget *dialog;
/************************/
/* Convenience routines */
/************************/
void rgb_add(rgbpixel *a,rgbpixel *b)
{
a->r=a->r+b->r;
a->g=a->g+b->g;
a->b=a->b+b->b;
}
void rgb_mul(rgbpixel *a,gdouble b)
{
a->r=a->r*b;
a->g=a->g*b;
a->b=a->b*b;
}
void rgb_clamp(rgbpixel *a)
{
if (a->r>1.0)
a->r=1.0;
if (a->g>1.0)
a->g=1.0;
if (a->b>1.0)
a->b=1.0;
if (a->r<0.0)
a->r=0.0;
if (a->g<0.0)
a->g=0.0;
if (a->b<0.0)
a->b=0.0;
}
void set_color(rgbpixel *a,gdouble r,gdouble g,gdouble b)
{
a->r=r; a->g=g; a->b=b;
}
glong xy_to_index(gint x,gint y)
{
return((glong)in_channels*((glong)x+(glong)y*(glong)width));
}
gboolean checkbounds(gint x,gint y)
{
if (x<0 || y<0 || x>width-1 || y>height-1)
return(FALSE);
return(TRUE);
}
rgbpixel peek(gint x,gint y)
{
static guchar data[4];
rgbpixel color;
gimp_pixel_rgn_get_pixel(&source_region,data,x,y);
color.r=(gdouble)(data[0])/255.0;
color.g=(gdouble)(data[1])/255.0;
color.b=(gdouble)(data[2])/255.0;
if (input_drawable->bpp==4)
{
if (in_channels==4)
color.a=(gdouble)(data[3])/255.0;
else
color.a=1.0;
}
else
color.a=1.0;
return(color);
}
void poke(gint x,gint y,rgbpixel *color)
{
static guchar data[4];
data[0]=(guchar)(color->r*255.0);
data[1]=(guchar)(color->g*255.0);
data[2]=(guchar)(color->b*255.0);
data[3]=(guchar)(color->a*255.0);
gimp_pixel_rgn_set_pixel(&dest_region,data,x,y);
}
void pos_to_int(gdouble x,gdouble y,gint *scr_x,gint *scr_y)
{
*scr_x=(gint)((x*(gdouble)width));
*scr_y=(gint)((y*(gdouble)height));
}
/****************************************/
/* Allocate memory for temporary images */
/****************************************/
gint image_setup(GDrawable *drawable,gint interactive)
{
/* Get some useful info on the input drawable */
/* ========================================== */
input_drawable=drawable;
output_drawable=drawable;
gimp_drawable_mask_bounds (drawable->id, &border_x1, &border_y1, &border_x2, &border_y2);
width=input_drawable->width;
height=input_drawable->height;
gimp_pixel_rgn_init (&source_region, input_drawable, 0, 0, width, height, FALSE, FALSE);
maxcounter=(glong)width*(glong)height;
/* Assume at least RGB */
/* =================== */
in_channels=3;
if (gimp_drawable_has_alpha(input_drawable->id)==TRUE)
in_channels++;
if (interactive==TRUE)
{
/* Allocate memory for temp. images */
/* ================================ */
}
return(TRUE);
}
guchar peekmap(guchar *image,gint x,gint y)
{
glong index;
index=(glong)x+(glong)width*(glong)y;
return(image[index]);
}
/*************/
/* Main part */
/*************/
/***************************************************/
/* Compute the derivative in the x and y direction */
/* We use these convolution kernels: */
/* |1 0 -1| | 1 2 1| */
/* DX: |2 0 -2| DY: | 0 0 0| */
/* |1 0 -1| | -1 -2 -1| */
/* (It's a varation of the Sobel kernels, really) */
/***************************************************/
gint gradx(guchar *image,gint x,gint y)
{
gint val=0;
if (CHECKBOUNDS(x-1,y-1)==TRUE)
val=val+(gint)peekmap(image,x-1,y-1);
if (CHECKBOUNDS(x+1,y-1)==TRUE)
val=val-(gint)peekmap(image,x+1,y-1);
if (CHECKBOUNDS(x-1,y)==TRUE)
val=val+2*(gint)peekmap(image,x-1,y);
if (CHECKBOUNDS(x+1,y)==TRUE)
val=val-2*(gint)peekmap(image,x+1,y);
if (CHECKBOUNDS(x-1,y+1)==TRUE)
val=val+(gint)peekmap(image,x-1,y+1);
if (CHECKBOUNDS(x+1,y+1)==TRUE)
val=val-(gint)peekmap(image,x+1,y+1);
return(val);
}
gint grady(guchar *image,gint x,gint y)
{
gint val=0;
if (CHECKBOUNDS(x-1,y-1)==TRUE)
val=val+(gint)peekmap(image,x-1,y-1);
if (CHECKBOUNDS(x,y-1)==TRUE)
val=val+2*(gint)peekmap(image,x,y-1);
if (CHECKBOUNDS(x+1,y-1)==TRUE)
val=val+(gint)peekmap(image,x+1,y-1);
if (CHECKBOUNDS(x-1,y+1)==TRUE)
val=val-(gint)peekmap(image,x-1,y+1);
if (CHECKBOUNDS(x,y+1)==TRUE)
val=val-2*(gint)peekmap(image,x,y+1);
if (CHECKBOUNDS(x+1,y+1)==TRUE)
val=val-(gint)peekmap(image,x+1,y+1);
return(val);
}
/************************************/
/* A nice 2nd order cubic spline :) */
/************************************/
gdouble cubic(gdouble t)
{
gdouble at=fabs(t);
if (at<1.0)
return(2.0*at*at*at-3.0*at*at+1.0);
return(0.0);
}
gdouble omega(gdouble u,gdouble v,gint i,gint j)
{
while (i<0)
i+=numx;
while (j<0)
j+=numy;
i%=numx;
j%=numy;
return(cubic(u)*cubic(v)*(G[i][j][0]*u+G[i][j][1]*v));
}
/*************************************************************/
/* The noise function (2D variant of Perlins noise function) */
/*************************************************************/
gdouble noise(gdouble x,gdouble y)
{
gint i,sti=(gint)floor(x/dx);
gint j,stj=(gint)floor(y/dy);
gdouble sum=0.0;
/* Calculate the gdouble sum */
/* ======================== */
for (i=sti; i<=sti+1; i++)
{
for (j=stj; j<=stj+1; j++)
sum+=omega((x-(gdouble)i*dx)/dx,(y-(gdouble)j*dy)/dy,i,j);
}
return(sum);
}
/*************************************************/
/* Generates pseudo-random vectors with length 1 */
/*************************************************/
void generatevectors(void)
{
gdouble alpha;
gint i,j;
for (i=0; i<numx; i++)
{
for (j=0; j<numy; j++)
{
alpha = (gdouble)(rand()%1000)*(M_PI/500.0);
G[i][j][0] = cos(alpha);
G[i][j][1] = sin(alpha);
}
}
}
/* A simple triangle filter */
/* ======================== */
gdouble filter(gdouble u)
{
gdouble f=1.0-fabs(u)/l;
if (f<0.0)
f=0.0;
return(f);
}
/******************************************************/
/* Compute the Line Integral Convolution (LIC) at x,y */
/******************************************************/
gdouble lic_noise(gint x,gint y,gdouble vx,gdouble vy)
{
gdouble i=0.0;
gdouble f1=0.0,f2=0.0;
gdouble u,step=2.0*l/isteps;
gdouble xx=(gdouble)x,yy=(gdouble)y;
gdouble c,s;
/* Get vector at x,y */
/* ================= */
c = vx;
s = vy;
/* Calculate integral numerically */
/* ============================== */
f1 = filter(-l)*noise(xx+l*c,yy+l*s);
for (u=-l+step; u<=l; u+=step)
{
f2 = filter(u)*noise(xx-u*c,yy-u*s);
i+=(f1+f2)*0.5*step;
f1=f2;
}
i=(i-minv)/(maxv-minv);
if (i<0.0)
i=0.0;
if (i>1.0)
i=1.0;
i=(i/2.0)+0.5;
return(i);
}
static rgbpixel bilinear(gdouble x, gdouble y, rgbpixel *p)
{
gdouble m0, m1;
gdouble ix, iy;
rgbpixel v;
x = fmod(x, 1.0);
y = fmod(y, 1.0);
if (x < 0)
x += 1.0;
if (y < 0)
y += 1.0;
ix = 1.0 - x;
iy = 1.0 - y;
/* Red */
/* === */
m0 = ix * p[0].r + x * p[1].r;
m1 = ix * p[2].r + x * p[3].r;
v.r = iy * m0 + y * m1;
/* Green */
/* ===== */
m0 = ix * p[0].g + x * p[1].g;
m1 = ix * p[2].g + x * p[3].g;
v.g = iy * m0 + y * m1;
/* Blue */
/* ==== */
m0 = ix * p[0].b + x * p[1].b;
m1 = ix * p[2].b + x * p[3].b;
v.b = iy * m0 + y * m1;
return(v);
} /* bilinear */
void getpixel(rgbpixel *p,gdouble u,gdouble v)
{
register gint x1, y1, x2, y2;
static rgbpixel pp[4];
x1 = (gint)u;
y1 = (gint)v;
if (x1 < 0)
x1 = width - (-x1 % width);
else
x1 = x1 % width;
if (y1 < 0)
y1 = height - (-y1 % height);
else
y1 = y1 % height;
x2 = (x1 + 1) % width;
y2 = (y1 + 1) % height;
pp[0] = peek(x1, y1);
pp[1] = peek(x2, y1);
pp[2] = peek(x1, y2);
pp[3] = peek(x2, y2);
*p=bilinear(u,v,pp);
}
void lic_image(gint x,gint y,gdouble vx,gdouble vy,rgbpixel *color)
{
gdouble u,step=2.0*l/isteps;
gdouble xx=(gdouble)x,yy=(gdouble)y;
gdouble c,s;
rgbpixel col,col1,col2,col3;
/* Get vector at x,y */
/* ================= */
c = vx;
s = vy;
/* Calculate integral numerically */
/* ============================== */
col=black;
getpixel(&col1,xx+l*c,yy+l*s);
rgb_mul(&col1,filter(-l));
for (u=-l+step; u<=l; u+=step)
{
getpixel(&col2,xx-u*c,yy-u*s);
rgb_mul(&col2,filter(u));
col3=col1;
rgb_add(&col3,&col2);
rgb_mul(&col3,0.5*step);
rgb_add(&col,&col3);
col1=col2;
}
rgb_mul(&col,1.0/l);
rgb_clamp(&col);
*color=col;
}
gdouble maximum(gdouble a,gdouble b,gdouble c)
{
gdouble max=a;
if (b>max)
max=b;
if (c>max)
max=c;
return(max);
}
gdouble minimum(gdouble a,gdouble b,gdouble c)
{
gdouble min=a;
if (b<min)
min=b;
if (c<min)
min=c;
return(min);
}
void get_hue(rgbpixel *col,gdouble *hue)
{
gdouble max,min,delta;
max=maximum(col->r,col->g,col->b);
min=minimum(col->r,col->g,col->b);
if (max==min) *hue=-1.0;
else
{
delta=max-min;
if (col->r==max)
*hue=(col->g-col->b)/delta;
else if (col->g==max)
*hue=2.0+(col->b-col->r)/delta;
else if (col->b==max)
*hue=4.0+(col->r-col->g)/delta;
*hue=*hue*60.0;
if (*hue<0.0)
*hue=*hue+360.0;
}
}
void get_saturation(rgbpixel *col,gdouble *sat)
{
gdouble max,min,l;
max=maximum(col->r,col->g,col->b);
min=minimum(col->r,col->g,col->b);
if (max==min)
*sat=0.0;
else
{
l=(max+min)/2.0;
if (l<=0.5)
*sat=(max-min)/(max+min);
else
*sat=(max-min)/(2.0-max-min);
}
}
void get_brightness(rgbpixel *col,gdouble *bri)
{
gdouble max,min;
max=maximum(col->r,col->g,col->b);
min=minimum(col->r,col->g,col->b);
*bri=(max+min)/2.0;
}
void rgb_to_hue(GDrawable *image,guchar **map)
{
guchar *themap,data[4];
gint w,h,x,y;
rgbpixel color;
gdouble val;
glong maxc,index=0;
GPixelRgn region;
w=image->width;
h=image->height;
maxc=(glong)w*(glong)h;
/* gimp_drawable_mask_bounds (drawable->id, &border_x1, &border_y1, &border_x2, &border_y2); */
gimp_pixel_rgn_init (&region, image, 0, 0, w, h, FALSE, FALSE);
themap=(guchar *)malloc((size_t)maxc*sizeof(guchar));
for (y=0;y<h;y++)
{
for (x=0;x<w;x++)
{
gimp_pixel_rgn_get_pixel(&region,data,x,y);
color.r=data[0];
color.g=data[1];
color.b=data[2];
get_hue(&color,&val);
themap[index++]=(guchar)(val*255.0);
}
}
*map=themap;
}
void rgb_to_saturation(GDrawable *image,guchar **map)
{
guchar *themap,data[4];
gint w,h,x,y;
rgbpixel color;
gdouble val;
glong maxc,index=0;
GPixelRgn region;
w=image->width;
h=image->height;
maxc=(glong)w*(glong)h;
/* gimp_drawable_mask_bounds (drawable->id, &border_x1, &border_y1, &border_x2, &border_y2); */
gimp_pixel_rgn_init (&region, image, 0, 0, w, h, FALSE, FALSE);
themap=(guchar *)malloc((size_t)maxc*sizeof(guchar));
for (y=0;y<h;y++)
{
for (x=0;x<w;x++)
{
gimp_pixel_rgn_get_pixel(&region,data,x,y);
color.r=data[0];
color.g=data[1];
color.b=data[2];
get_saturation(&color,&val);
themap[index++]=(guchar)(val*255.0);
}
}
*map=themap;
}
void rgb_to_brightness(GDrawable *image,guchar **map)
{
guchar *themap,data[4];
gint w,h,x,y;
rgbpixel color;
gdouble val;
glong maxc,index=0;
GPixelRgn region;
w=image->width;
h=image->height;
maxc=(glong)w*(glong)h;
/* gimp_drawable_mask_bounds (drawable->id, &border_x1, &border_y1, &border_x2, &border_y2); */
gimp_pixel_rgn_init (&region, image, 0, 0, w, h, FALSE, FALSE);
themap=(guchar *)malloc((size_t)maxc*sizeof(guchar));
for (y=0;y<h;y++)
{
for (x=0;x<w;x++)
{
gimp_pixel_rgn_get_pixel(&region,data,x,y);
color.r=data[0];
color.g=data[1];
color.b=data[2];
get_brightness(&color,&val);
themap[index++]=(guchar)(val*255.0);
}
}
*map=themap;
}
void compute_lic_derivative(void)
{
gint xcount,ycount;
glong counter=0;
rgbpixel color;
gdouble vx,vy,tmp;
for (ycount=0;ycount<height;ycount++)
{
for (xcount=0;xcount<width;xcount++)
{
/* Get direction vector at (x,y) and normalize it */
/* ============================================== */
vx=gradx(scalarfield,xcount,ycount);
vy=grady(scalarfield,xcount,ycount);
tmp=sqrt(vx*vx+vy*vy);
if (tmp!=0.0)
{
tmp=1.0/tmp;
vx*=tmp; vy*=tmp;
}
/* Convolve with the LIC at (x,y) */
/* ============================== */
if (licvals.effect_convolve==0)
{
color=peek(xcount,ycount);
tmp=lic_noise(xcount,ycount,vx,vy);
rgb_mul(&color,tmp);
}
else
lic_image(xcount,ycount,vx,vy,&color);
poke(xcount,ycount,&color);
counter++;
if ((counter % width)==0)
gimp_progress_update((gfloat)counter/(gfloat)maxcounter);
}
}
}
void compute_lic_gradient(void)
{
gint xcount,ycount;
glong counter=0;
rgbpixel color;
gdouble vx,vy,tmp;
for (ycount=0;ycount<height;ycount++)
{
for (xcount=0;xcount<width;xcount++)
{
/* Get derivative at (x,y), rotate it 90 degrees and normalize it */
/* ============================================================== */
vx=gradx(scalarfield,xcount,ycount);
vy=grady(scalarfield,xcount,ycount);
vx=-1.0*vx; tmp=vy; vy=vx; vx=tmp;
tmp=sqrt(vx*vx+vy*vy);
if (tmp!=0.0)
{
tmp=1.0/tmp;
vx*=tmp; vy*=tmp;
}
/* Convolve with the LIC at (x,y) */
/* ============================== */
if (licvals.effect_convolve==0)
{
color=peek(xcount,ycount);
tmp=lic_noise(xcount,ycount,vx,vy);
rgb_mul(&color,tmp);
}
else
lic_image(xcount,ycount,vx,vy,&color);
poke(xcount,ycount,&color);
counter++;
if ((counter % width)==0)
gimp_progress_update((gfloat)counter/(gfloat)maxcounter);
}
}
}
void compute_image(void)
{
gint32 new_image_id=-1,new_layer_id=-1;
GDrawable *effect;
if (licvals.create_new_image==TRUE)
{
/* Create a new image */
/* ================== */
new_image_id=gimp_image_new(width,height,RGB);
/* Create a "normal" layer */
/* ======================= */
new_layer_id=gimp_layer_new(new_image_id,"Background",
width,height,RGB_IMAGE,100.0,NORMAL_MODE);
gimp_image_add_layer(new_image_id,new_layer_id,0);
output_drawable=gimp_drawable_get(new_layer_id);
}
gimp_pixel_rgn_init (&dest_region, output_drawable, 0,0, width,height, TRUE,TRUE);
gimp_progress_init("Van Gogh (LIC)");
if (licvals.effect_convolve==0)
generatevectors();
l=(gdouble)licvals.filtlen;
dx=dy=(gdouble)licvals.noisemag;
minv=((gdouble)licvals.minv)/10.0;
maxv=((gdouble)licvals.maxv)/10.0;
isteps=(gdouble)licvals.intsteps;
effect=gimp_drawable_get(licvals.effect_image_id);
switch (licvals.effect_channel)
{
case 0:
rgb_to_hue(effect,&scalarfield);
break;
case 1:
rgb_to_saturation(effect,&scalarfield);
break;
case 2:
rgb_to_brightness(effect,&scalarfield);
break;
}
if (scalarfield==NULL)
{
printf("LIC: Couldn't allocate temporary buffer - out of memory!\n");
return;
}
if (licvals.effect_operator==0)
compute_lic_derivative();
else
compute_lic_gradient();
free(scalarfield);
/* Update image */
/* ============ */
gimp_drawable_flush(output_drawable);
gimp_drawable_merge_shadow(output_drawable->id, TRUE);
gimp_drawable_update(output_drawable->id, 0,0, width,height);
if (new_image_id!=-1)
{
gimp_display_new(new_image_id);
gimp_displays_flush();
gimp_drawable_detach(output_drawable);
}
}
/**************************/
/* Below is only UI stuff */
/**************************/
void ok_button_clicked(GtkWidget *widget, gpointer client_data)
{
gtk_widget_hide((GtkWidget *)client_data);
gdk_flush();
compute_image();
gtk_widget_destroy((GtkWidget *)client_data);
}
void cancel_button_clicked(GtkWidget *widget, gpointer client_data)
{
gtk_widget_destroy((GtkWidget *)client_data);
}
void dialog_destroy(GtkWidget *widget, gpointer client_data)
{
gtk_main_quit();
}
void effect_channel_callback(GtkWidget *widget,gpointer client_data)
{
if (GTK_TOGGLE_BUTTON(widget)->active)
{
licvals.effect_channel=(guchar)((glong)client_data);
}
}
void effect_operator_callback(GtkWidget *widget,gpointer client_data)
{
if (GTK_TOGGLE_BUTTON(widget)->active)
{
licvals.effect_operator=(guchar)((glong)client_data);
}
}
void effect_convolve_callback(GtkWidget *widget,gpointer client_data)
{
if (GTK_TOGGLE_BUTTON(widget)->active)
licvals.effect_convolve=(guchar)((glong)client_data);
}
gint effect_image_constrain(gint32 image_id, gint32 drawable_id, gpointer data)
{
if (drawable_id == -1)
return(TRUE);
return(gimp_drawable_color(drawable_id));
}
void effect_image_callback(gint32 id, gpointer data)
{
licvals.effect_image_id=id;
}
void effect_parameter_update(GtkAdjustment *adjustment, gpointer client_data)
{
*((glong *)client_data)=(gdouble)adjustment->value;
}
void create_main_dialog(void)
{
GtkWidget *frame;
GtkWidget *vbox,*hbox,*vbox2,*hbox2;
GtkWidget *label;
GtkWidget *option_menu;
GtkWidget *menu;
GtkWidget *button;
GtkWidget *scale;
GtkObject *scale_data;
GSList *group=NULL;
/* Dialog */
dialog = gtk_dialog_new();
gtk_window_set_title(GTK_WINDOW(dialog), "Van Gogh (LIC)");
gtk_window_position(GTK_WINDOW(dialog), GTK_WIN_POS_MOUSE);
gtk_container_border_width(GTK_CONTAINER(dialog), 0);
gtk_signal_connect(GTK_OBJECT(dialog), "destroy",
(GtkSignalFunc)dialog_destroy, (gpointer)dialog);
hbox = gtk_hbox_new(FALSE,5);
gtk_container_border_width(GTK_CONTAINER(hbox),5);
gtk_container_add(GTK_CONTAINER(GTK_DIALOG(dialog)->vbox),hbox);
vbox=gtk_vbox_new(FALSE,0);
gtk_box_pack_start(GTK_BOX(hbox), vbox, FALSE, FALSE, 5);
frame = gtk_frame_new("Options");
gtk_frame_set_shadow_type(GTK_FRAME(frame),GTK_SHADOW_ETCHED_IN);
gtk_container_add(GTK_CONTAINER(vbox),frame);
hbox2=gtk_hbox_new(FALSE,5);
gtk_container_add(GTK_CONTAINER(frame),hbox2);
button = gtk_check_button_new_with_label("Create new image");
if (licvals.create_new_image==TRUE)
gtk_toggle_button_set_state(GTK_TOGGLE_BUTTON(button),TRUE);
gtk_container_add(GTK_CONTAINER(hbox2),button);
gtk_widget_show(button);
gtk_widget_show(hbox2);
gtk_widget_show(frame);
frame = gtk_frame_new("Effect channel");
gtk_frame_set_shadow_type(GTK_FRAME(frame),GTK_SHADOW_ETCHED_IN);
gtk_container_add(GTK_CONTAINER(vbox),frame);
vbox2=gtk_vbox_new(FALSE,0);
gtk_container_add(GTK_CONTAINER(frame),vbox2);
button = gtk_radio_button_new_with_label(NULL,"Hue");
group = gtk_radio_button_group(GTK_RADIO_BUTTON(button));
if (licvals.effect_channel==0)
gtk_toggle_button_set_state(GTK_TOGGLE_BUTTON(button), TRUE);
gtk_signal_connect(GTK_OBJECT(button), "toggled",
(GtkSignalFunc)effect_channel_callback,
(gpointer)0);
gtk_box_pack_start(GTK_BOX(vbox2), button, FALSE, FALSE, 0);
gtk_widget_show(button);
button = gtk_radio_button_new_with_label(group,"Saturation");
if (licvals.effect_channel==1)
gtk_toggle_button_set_state(GTK_TOGGLE_BUTTON(button), TRUE);
gtk_signal_connect(GTK_OBJECT(button), "toggled",
(GtkSignalFunc)effect_channel_callback,
(gpointer)1);
gtk_box_pack_start(GTK_BOX(vbox2), button, FALSE, FALSE, 0);
gtk_widget_show(button);
button = gtk_radio_button_new_with_label(group,"Brightness");
if (licvals.effect_channel==2)
gtk_toggle_button_set_state(GTK_TOGGLE_BUTTON(button), TRUE);
gtk_signal_connect(GTK_OBJECT(button), "toggled",
(GtkSignalFunc)effect_channel_callback,
(gpointer)2);
gtk_box_pack_start(GTK_BOX(vbox2), button, FALSE, FALSE, 0);
gtk_widget_show(button);
gtk_widget_show(vbox2);
gtk_widget_show(frame);
frame = gtk_frame_new("Effect operator");
gtk_frame_set_shadow_type(GTK_FRAME(frame),GTK_SHADOW_ETCHED_IN);
gtk_container_add(GTK_CONTAINER(vbox),frame);
vbox2=gtk_vbox_new(FALSE,0);
gtk_container_add(GTK_CONTAINER(frame),vbox2);
button = gtk_radio_button_new_with_label(NULL,"Derivative");
group = gtk_radio_button_group(GTK_RADIO_BUTTON(button));
if (licvals.effect_operator==0)
gtk_toggle_button_set_state(GTK_TOGGLE_BUTTON(button), TRUE);
gtk_signal_connect(GTK_OBJECT(button), "toggled",
(GtkSignalFunc)effect_operator_callback,
(gpointer)0);
gtk_box_pack_start(GTK_BOX(vbox2), button, FALSE, FALSE, 0);
gtk_widget_show(button);
button = gtk_radio_button_new_with_label(group,"Gradient");
if (licvals.effect_operator==1)
gtk_toggle_button_set_state(GTK_TOGGLE_BUTTON(button), TRUE);
gtk_signal_connect(GTK_OBJECT(button), "toggled",
(GtkSignalFunc)effect_operator_callback,
(gpointer)1);
gtk_box_pack_start(GTK_BOX(vbox2), button, FALSE, FALSE, 0);
gtk_widget_show(button);
gtk_widget_show(vbox2);
gtk_widget_show(frame);
frame = gtk_frame_new("Convolve");
gtk_frame_set_shadow_type(GTK_FRAME(frame),GTK_SHADOW_ETCHED_IN);
gtk_container_add(GTK_CONTAINER(vbox),frame);
vbox2=gtk_vbox_new(FALSE,0);
gtk_container_add(GTK_CONTAINER(frame),vbox2);
button = gtk_radio_button_new_with_label(NULL,"With white noise");
group = gtk_radio_button_group(GTK_RADIO_BUTTON(button));
if (licvals.effect_convolve==0)
gtk_toggle_button_set_state(GTK_TOGGLE_BUTTON(button), TRUE);
gtk_signal_connect(GTK_OBJECT(button), "toggled",
(GtkSignalFunc)effect_convolve_callback,
(gpointer)0);
gtk_box_pack_start(GTK_BOX(vbox2), button, FALSE, FALSE, 0);
gtk_widget_show(button);
button = gtk_radio_button_new_with_label(group,"With source image");
if (licvals.effect_convolve==1)
gtk_toggle_button_set_state(GTK_TOGGLE_BUTTON(button), TRUE);
gtk_signal_connect(GTK_OBJECT(button), "toggled",
(GtkSignalFunc)effect_convolve_callback,
(gpointer)1);
gtk_box_pack_start(GTK_BOX(vbox2), button, FALSE, FALSE, 0);
gtk_widget_show(button);
gtk_widget_show(vbox2);
gtk_widget_show(frame);
gtk_widget_show(vbox);
vbox=gtk_vbox_new(FALSE,0);
gtk_box_pack_start(GTK_BOX(hbox), vbox, FALSE, FALSE, 5);
frame = gtk_frame_new("Parameters");
gtk_frame_set_shadow_type(GTK_FRAME(frame),GTK_SHADOW_ETCHED_IN);
gtk_container_add(GTK_CONTAINER(vbox),frame);
/* Effect image menu */
vbox2=gtk_vbox_new(FALSE,0);
gtk_container_add(GTK_CONTAINER(frame),vbox2);
hbox2=gtk_hbox_new(FALSE,0);
gtk_container_add(GTK_CONTAINER(vbox2),hbox2);
label = gtk_label_new("Effect image:");
gtk_container_add(GTK_CONTAINER(hbox2),label);
gtk_widget_show(label);
option_menu = gtk_option_menu_new();
menu = gimp_drawable_menu_new(effect_image_constrain,
effect_image_callback,
NULL,
licvals.effect_image_id);
gtk_option_menu_set_menu(GTK_OPTION_MENU(option_menu), menu);
gtk_container_add(GTK_CONTAINER(hbox2),option_menu);
gtk_widget_show(option_menu);
gtk_widget_show(hbox2);
label = gtk_label_new("Filter length:");
gtk_misc_set_alignment(GTK_MISC(label), 0.5, 1.0);
gtk_container_add(GTK_CONTAINER(vbox2),label);
gtk_widget_show(label);
scale_data = gtk_adjustment_new(licvals.filtlen, 0, 64, 1.0, 1.0, 0.0);
gtk_signal_connect(GTK_OBJECT(scale_data), "value_changed",
(GtkSignalFunc)effect_parameter_update,
(gpointer)&licvals.filtlen);
scale = gtk_hscale_new(GTK_ADJUSTMENT(scale_data));
gtk_range_set_update_policy(GTK_RANGE(scale), GTK_UPDATE_CONTINUOUS);
gtk_container_add(GTK_CONTAINER(vbox2),scale);
gtk_widget_show(scale);
label = gtk_label_new("Noise magnitude:");
gtk_misc_set_alignment(GTK_MISC(label), 0.5, 1.0);
gtk_container_add(GTK_CONTAINER(vbox2),label);
gtk_widget_show(label);
scale_data = gtk_adjustment_new(licvals.noisemag, 1, 5, 1.0, 1.0, 0.0);
gtk_signal_connect(GTK_OBJECT(scale_data), "value_changed",
(GtkSignalFunc)effect_parameter_update,
(gpointer)&licvals.noisemag);
scale = gtk_hscale_new(GTK_ADJUSTMENT(scale_data));
gtk_range_set_update_policy(GTK_RANGE(scale), GTK_UPDATE_CONTINUOUS);
gtk_container_add(GTK_CONTAINER(vbox2),scale);
gtk_widget_show(scale);
label = gtk_label_new("Integration steps:");
gtk_misc_set_alignment(GTK_MISC(label), 0.5, 1.0);
gtk_container_add(GTK_CONTAINER(vbox2),label);
gtk_widget_show(label);
scale_data = gtk_adjustment_new(licvals.intsteps, 1, 40, 1.0, 1.0, 0.0);
gtk_signal_connect(GTK_OBJECT(scale_data), "value_changed",
(GtkSignalFunc)effect_parameter_update,
(gpointer)&licvals.intsteps);
scale = gtk_hscale_new(GTK_ADJUSTMENT(scale_data));
gtk_range_set_update_policy(GTK_RANGE(scale), GTK_UPDATE_CONTINUOUS);
gtk_container_add(GTK_CONTAINER(vbox2),scale);
gtk_widget_show(scale);
label = gtk_label_new("Minimum value:");
gtk_misc_set_alignment(GTK_MISC(label), 0.5, 1.0);
gtk_container_add(GTK_CONTAINER(vbox2),label);
gtk_widget_show(label);
scale_data = gtk_adjustment_new(licvals.minv, -100, 0, 1.0, 1.0, 0.0);
gtk_signal_connect(GTK_OBJECT(scale_data), "value_changed",
(GtkSignalFunc)effect_parameter_update,
(gpointer)&licvals.minv);
scale = gtk_hscale_new(GTK_ADJUSTMENT(scale_data));
gtk_range_set_update_policy(GTK_RANGE(scale), GTK_UPDATE_CONTINUOUS);
gtk_container_add(GTK_CONTAINER(vbox2),scale);
gtk_widget_show(scale);
label = gtk_label_new("Maximum value:");
gtk_misc_set_alignment(GTK_MISC(label), 0.5, 1.0);
gtk_container_add(GTK_CONTAINER(vbox2),label);
gtk_widget_show(label);
scale_data = gtk_adjustment_new(licvals.maxv, 0, 100, 1.0, 1.0, 0.0);
gtk_signal_connect(GTK_OBJECT(scale_data), "value_changed",
(GtkSignalFunc)effect_parameter_update,
(gpointer)&licvals.maxv);
scale = gtk_hscale_new(GTK_ADJUSTMENT(scale_data));
gtk_range_set_update_policy(GTK_RANGE(scale), GTK_UPDATE_CONTINUOUS);
gtk_container_add(GTK_CONTAINER(vbox2),scale);
gtk_widget_show(scale);
gtk_widget_show(vbox2);
gtk_widget_show(frame);
gtk_widget_show(vbox);
gtk_widget_show(hbox);
/* Buttons */
gtk_container_border_width(GTK_CONTAINER(GTK_DIALOG(dialog)->action_area), 6);
button = gtk_button_new_with_label("OK");
GTK_WIDGET_SET_FLAGS(button, GTK_CAN_DEFAULT);
gtk_signal_connect(GTK_OBJECT(button), "clicked",
(GtkSignalFunc)ok_button_clicked,(gpointer)dialog);
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->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(GTK_OBJECT(button), "clicked",
(GtkSignalFunc)cancel_button_clicked,(gpointer)dialog);
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->action_area), button, TRUE, TRUE, 0);
gtk_widget_show(button);
/* Done */
gtk_widget_show(dialog);
}
/******************/
/* Implementation */
/******************/
void lic_interactive (GDrawable *drawable);
void lic_noninteractive (GDrawable *drawable);
/*************************************/
/* Set parameters to standard values */
/*************************************/
void set_default_settings(void)
{
licvals.filtlen=5;
licvals.noisemag=2;
licvals.intsteps=25;
licvals.minv=-25;
licvals.maxv=25;
licvals.create_new_image=TRUE;
licvals.effect_channel=2;
licvals.effect_operator=1;
licvals.effect_convolve=1;
licvals.effect_image_id=0;
}
MAIN()
static void query(void)
{
static GParamDef args[] =
{
{ PARAM_INT32, "run_mode", "Interactive" },
{ PARAM_IMAGE, "image", "Input image" },
{ PARAM_DRAWABLE, "drawable", "Input drawable" },
};
static GParamDef *return_vals = NULL;
static gint nargs = sizeof (args) / sizeof (args[0]);
static gint nreturn_vals = 0;
gimp_install_procedure ("plug_in_lic",
"Creates a Van Gogh effect (Line Integral Convolution)",
"No help yet",
"Tom Bech & Federico Mena Quintero",
"Tom Bech & Federico Mena Quintero",
"Version 0.14, September 24 1997",
"<Image>/Filters/Artistic/Van Gogh (LIC)",
"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;
/* Set default values */
/* ================== */
set_default_settings();
/* Possibly retrieve data */
/* ====================== */
gimp_get_data ("plug_in_lic", &licvals);
/* Get the specified drawable */
/* ========================== */
drawable = gimp_drawable_get (param[2].data.d_drawable);
if (status == STATUS_SUCCESS)
{
/* Make sure that the drawable is RGBA or RGB color */
/* ================================================ */
if (gimp_drawable_color(drawable->id))
{
/* Set the tile cache size */
/* ======================= */
gimp_tile_cache_ntiles(TILE_CACHE_SIZE);
switch (run_mode)
{
case RUN_INTERACTIVE:
lic_interactive(drawable);
gimp_set_data("plug_in_lic", &licvals, sizeof(LicValues));
break;
case RUN_WITH_LAST_VALS:
image_setup(drawable,FALSE);
compute_image();
break;
default:
break;
}
}
else
status = STATUS_EXECUTION_ERROR;
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
void lic_interactive(GDrawable *drawable)
{
gchar **argv;
gint argc;
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("lic");
gdk_set_debug_level(0);
gdk_set_show_events(0);
gdk_set_use_xshm(gimp_use_xshm());
gtk_init (&argc, &argv);
/* Create application window */
/* ========================= */
create_main_dialog();
/* Prepare images */
/* ============== */
image_setup(drawable,TRUE);
/* Gtk main event loop */
/* =================== */
gtk_main();
gdk_flush();
}
void lic_noninteractive(GDrawable *drawable)
{
printf("Noninteractive not yet implemented! Sorry.\n");
}
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