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gimp/plug-ins/gimpressionist/brush.c

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#ifdef HAVE_CONFIG_H
#include "config.h"
#else
#define HAVE_DIRENT_H
#define HAVE_UNISTD_H
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include <libgimp/stdplugins-intl.h>
#include <math.h>
#include "gimpressionist.h"
#include "ppmtool.h"
GtkWidget *brushlist = NULL;
GtkWidget *brushprev = NULL;
GtkObject *brushreliefadjust = NULL;
GtkObject *brushaspectadjust = NULL;
GtkObject *brushgammaadjust = NULL;
GtkWidget *brushdrawablemenu = NULL;
GtkWidget *brushemptyitem;
gint32 brushdrawableid;
int brushfile = 2;
struct ppm brushppm = {0,0,NULL};
void updatebrushprev(char *fn);
int colorfile(char *fn)
{
if(!fn) return 0;
if(strstr(fn, ".ppm")) return 1;
return 0;
}
void brushdmenuselect(gint32 id, gpointer data)
{
GPixelRgn src_rgn;
guchar *src_row;
guchar *src;
gint alpha, has_alpha, bpp;
gint x, y;
struct ppm *p;
gint x1, y1, x2, y2;
gint row, col;
GDrawable *drawable;
int rowstride;
if(brushfile == 2) return; /* Not finished GUI-building yet */
if(brushfile) {
unselectall(brushlist);
gtk_widget_set_sensitive (presetsavebutton, FALSE);
}
gtk_adjustment_set_value(GTK_ADJUSTMENT(brushgammaadjust), 1.0);
gtk_adjustment_set_value(GTK_ADJUSTMENT(brushaspectadjust), 0.0);
drawable = gimp_drawable_get(id);
gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
bpp = gimp_drawable_bpp (drawable->id);
has_alpha = gimp_drawable_has_alpha (drawable->id);
alpha = (has_alpha) ? bpp - 1 : bpp;
if(brushppm.col)
killppm(&brushppm);
newppm(&brushppm, x2-x1, y2-y1);
p = &brushppm;
rowstride = p->width * 3;
src_row = g_new (guchar, (x2 - x1) * bpp);
gimp_pixel_rgn_init (&src_rgn, drawable, 0, 0, x2-x1, y2-y1, FALSE, FALSE);
if(bpp == 3) { /* RGB */
int bpr = (x2-x1) * 3;
for(row = 0, y = y1; y < y2; row++, y++) {
gimp_pixel_rgn_get_row (&src_rgn, src_row, x1, y, (x2 - x1));
memcpy(p->col + row*rowstride, src_row, bpr);
}
} else if(bpp > 3) { /* RGBA */
for(row = 0, y = y1; y < y2; row++, y++) {
guchar *tmprow = p->col + row * rowstride;
gimp_pixel_rgn_get_row (&src_rgn, src_row, x1, y, (x2 - x1));
src = src_row;
for (col = 0, x = x1; x < x2; col++, x++) {
int k = col * 3;
tmprow[k+0] = src[0];
tmprow[k+1] = src[1];
tmprow[k+2] = src[2];
src += src_rgn.bpp;
}
}
} else if(bpp == 2) { /* GrayA */
for(row = 0, y = y1; y < y2; row++, y++) {
guchar *tmprow = p->col + row * rowstride;
gimp_pixel_rgn_get_row (&src_rgn, src_row, x1, y, (x2 - x1));
src = src_row;
for (col = 0, x = x1; x < x2; col++, x++) {
int k = col * 3;
tmprow[k+0] = src[0];
tmprow[k+1] = src[0];
tmprow[k+2] = src[0];
src += src_rgn.bpp;
}
}
} else { /* Gray */
for(row = 0, y = y1; y < y2; row++, y++) {
guchar *tmprow = p->col + row * rowstride;
gimp_pixel_rgn_get_row (&src_rgn, src_row, x1, y, (x2 - x1));
src = src_row;
for (col = 0, x = x1; x < x2; col++, x++) {
int k = col * 3;
tmprow[k+0] = src[0];
tmprow[k+1] = src[0];
tmprow[k+2] = src[0];
src += src_rgn.bpp;
}
}
}
g_free (src_row);
if(bpp >= 3) pcvals.colorbrushes = 1;
else pcvals.colorbrushes = 0;
brushfile = 0;
updatebrushprev(NULL);
}
void dummybrushdmenuselect(GtkWidget *w, gpointer data)
{
if(brushppm.col)
killppm(&brushppm);
newppm(&brushppm, 10,10);
brushfile = 0;
updatebrushprev(NULL);
}
void destroy_window (GtkWidget *widget, GtkWidget **window)
{
*window = NULL;
}
void brushlistrefresh(void)
{
GtkWidget *list = brushlist;
int n = g_list_length(GTK_LIST(list)->children);
gtk_list_clear_items(GTK_LIST(list), 0, n);
readdirintolist("Brushes", list, NULL);
}
void savebrush_ok(GtkWidget *w, GtkFileSelection *fs, gpointer data)
{
char *fn;
fn = gtk_file_selection_get_filename (GTK_FILE_SELECTION(fs));
saveppm(&brushppm, fn);
gtk_widget_destroy(GTK_WIDGET(fs));
brushlistrefresh();
}
void savebrush(GtkWidget *wg, gpointer data)
{
static GtkWidget *window = NULL;
GList *thispath = parsepath();
char path[200];
if(!brushppm.col) {
g_message( _("GIMPressionist: Can only save drawables!\n"));
return;
}
sprintf(path, "%s/Brushes/", (char *)thispath->data);
window = gtk_file_selection_new( _("Save brush"));
gtk_window_position (GTK_WINDOW (window), GTK_WIN_POS_MOUSE);
gtk_file_selection_set_filename(GTK_FILE_SELECTION(window), path);
gtk_signal_connect (GTK_OBJECT(window), "destroy",
(GtkSignalFunc) destroy_window, &window);
gtk_signal_connect (GTK_OBJECT(GTK_FILE_SELECTION(window)->ok_button),
"clicked", (GtkSignalFunc)savebrush_ok,(gpointer)window);
gtk_signal_connect_object(GTK_OBJECT(GTK_FILE_SELECTION(window)->cancel_button),
"clicked", (GtkSignalFunc) gtk_widget_destroy,
GTK_OBJECT(window));
gtk_widget_show(window);
return;
}
gint validdrawable(gint32 imageid, gint32 drawableid, gpointer data)
{
if(drawableid == -1) return TRUE;
return (gimp_drawable_is_rgb(drawableid) || gimp_drawable_is_gray(drawableid));
}
void reloadbrush(char *fn, struct ppm *p)
{
static char lastfn[200] = "";
static struct ppm cache = {0,0,NULL};
if(strcmp(fn, lastfn)) {
strncpy(lastfn, fn, 199);
loadppm(fn, &cache);
}
copyppm(&cache, p);
pcvals.colorbrushes = colorfile(fn);
}
void padbrush(struct ppm *p, int width, int height)
{
guchar black[3] = {0,0,0};
int left = (width - p->width) / 2;
int right = (width - p->width) - left;
int top = (height - p->height) / 2;
int bottom = (height - p->height) - top;
pad(p, left, right, top, bottom, black);
}
void updatebrushprev(char *fn)
{
int i, j;
char buf[100];
if(fn)
brushfile = 1;
if(!fn && brushfile) {
memset(buf, 0, 100);
for(i = 0; i < 100; i++) {
gtk_preview_draw_row (GTK_PREVIEW (brushprev), buf, 0, i, 100);
}
} else {
double sc;
struct ppm p = {0,0,NULL};
guchar gammatable[256];
int newheight;
if(brushfile)
reloadbrush(fn, &p);
else if(brushppm.col)
copyppm(&brushppm, &p);
pcvals.colorbrushes = colorfile(fn);
sc = GTK_ADJUSTMENT(brushgammaadjust)->value;
if(sc != 1.0)
for(i = 0; i < 256; i++)
gammatable[i] = pow(i / 255.0, sc) * 255;
else
for(i = 0; i < 256; i++)
gammatable[i] = i;
newheight = p.height*pow(10,GTK_ADJUSTMENT(brushaspectadjust)->value);
sc = p.width > newheight ? p.width : newheight;
sc = 100.0 / sc;
resize_fast(&p, p.width*sc,newheight*sc);
padbrush(&p,100,100);
for(i = 0; i < 100; i++) {
int k = i * p.width * 3;
memset(buf,0,100);
if(i < p.height)
for(j = 0; j < p.width; j++)
buf[j] = gammatable[p.col[k + j * 3]];
gtk_preview_draw_row (GTK_PREVIEW (brushprev), buf, 0, i, 100);
}
killppm(&p);
}
gtk_widget_draw (brushprev, NULL);
}
int brushdontupdate = 0;
void selectbrush(GtkWidget *wg, GtkWidget *p)
{
GList *h;
GtkWidget *tmpw;
char *l;
static char *oldl = NULL;
static char fname[200];
if(brushdontupdate) return;
if(brushfile == 0) {
updatebrushprev(NULL);
return;
}
/* Argh! Doesn't work! WHY!? :-( */
/*
gtk_menu_set_active(GTK_MENU(brushdrawablemenu),0);
gtk_menu_item_select(GTK_MENU_ITEM(brushemptyitem));
gtk_widget_draw_default(brushdrawablemenu);
gtk_widget_bite_me(brushdrawablemenu);
*/
if(!p) return;
h = GTK_LIST(p)->selection;
if(!h) return;
tmpw = h->data;
if(!tmpw) return;
gtk_label_get(GTK_LABEL(GTK_BIN(tmpw)->child), &l);
if(oldl) if(strcmp(oldl, l)) {
brushdontupdate = 1;
gtk_adjustment_set_value(GTK_ADJUSTMENT(brushgammaadjust), 1.0);
gtk_adjustment_set_value(GTK_ADJUSTMENT(brushaspectadjust), 0.0);
brushdontupdate = 0;
}
oldl = l;
sprintf(fname, "Brushes/%s", l);
strcpy(pcvals.selectedbrush, fname);
updatebrushprev(fname);
}
void selectbrushfile(GtkWidget *wg, GtkWidget *p)
{
brushfile = 1;
gtk_widget_set_sensitive (presetsavebutton, TRUE);
selectbrush(wg,p);
}
void create_brushpage(GtkNotebook *notebook)
{
GtkWidget *box1, *box2, *box3, *thispage;
GtkWidget *labelbox, *menubox;
GtkWidget *scrolled_win, *list;
GtkWidget *tmpw;
GtkWidget *dmenu;
labelbox = gtk_hbox_new (FALSE, 0);
tmpw = gtk_label_new (_("Brush"));
gtk_box_pack_start(GTK_BOX(labelbox), tmpw, FALSE, FALSE, 0);
gtk_widget_show_all(labelbox);
menubox = gtk_hbox_new (FALSE, 0);
tmpw = gtk_label_new (_("Brush"));
gtk_box_pack_start(GTK_BOX(menubox), tmpw, FALSE, FALSE, 0);
gtk_widget_show_all(menubox);
thispage = gtk_vbox_new(FALSE, 0);
gtk_container_border_width (GTK_CONTAINER (thispage), 5);
gtk_widget_show(thispage);
box1 = gtk_hbox_new (FALSE, 0);
gtk_box_pack_start(GTK_BOX(thispage), box1, TRUE,TRUE,0);
gtk_widget_show (box1);
scrolled_win = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
gtk_box_pack_start (GTK_BOX (box1), scrolled_win, FALSE, FALSE, 0);
gtk_widget_show (scrolled_win);
gtk_widget_set_usize(scrolled_win, 150,-1);
brushlist = list = gtk_list_new ();
gtk_list_set_selection_mode (GTK_LIST (list), GTK_SELECTION_BROWSE);
#if GTK_MINOR_VERSION > 0
gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (scrolled_win), list);
#else
gtk_container_add (GTK_CONTAINER (scrolled_win), list);
#endif
gtk_widget_show (list);
readdirintolist("Brushes", list, pcvals.selectedbrush);
box2 = gtk_vbox_new (FALSE, 0);
gtk_box_pack_start(GTK_BOX(box1), box2,FALSE,FALSE,0);
gtk_widget_show (box2);
gtk_container_border_width (GTK_CONTAINER (box2), 5);
tmpw = gtk_label_new( _("Brush Preview:"));
gtk_box_pack_start(GTK_BOX(box2), tmpw,FALSE,FALSE,0);
gtk_widget_show (tmpw);
brushprev = tmpw = gtk_preview_new (GTK_PREVIEW_GRAYSCALE);
gtk_preview_size(GTK_PREVIEW (tmpw), 100, 100);
gtk_box_pack_start(GTK_BOX (box2), tmpw, FALSE, FALSE, 5);
gtk_widget_show(tmpw);
tmpw = gtk_label_new( _("Gamma:"));
gtk_box_pack_start(GTK_BOX(box2), tmpw,FALSE,FALSE,0);
gtk_widget_show (tmpw);
brushgammaadjust = gtk_adjustment_new(pcvals.brushgamma, 0.5, 3.0, 0.1, 0.1, 1.0);
tmpw = gtk_hscale_new(GTK_ADJUSTMENT(brushgammaadjust));
gtk_widget_set_usize (GTK_WIDGET(tmpw), 100, 30);
gtk_scale_set_draw_value (GTK_SCALE (tmpw), FALSE);
gtk_scale_set_digits(GTK_SCALE (tmpw), 2);
gtk_box_pack_start (GTK_BOX (box2), tmpw, FALSE, FALSE, 0);
gtk_widget_show (tmpw);
gtk_signal_connect(GTK_OBJECT(brushgammaadjust), "value_changed",
(GtkSignalFunc)selectbrush, list);
gtk_tooltips_set_tip(GTK_TOOLTIPS(tooltips), tmpw, _("Changes the gamma (brightness) of the selected brush"), NULL);
box1 = gtk_hbox_new (FALSE, 0);
gtk_box_pack_start(GTK_BOX(thispage), box1,FALSE,FALSE,5);
gtk_widget_show (box1);
box2 = gtk_vbox_new (TRUE, 0);
gtk_box_pack_start(GTK_BOX(box1), box2,FALSE,FALSE,0);
gtk_widget_show (box2);
if(!standalone) {
tmpw = gtk_label_new( _("Select:"));
gtk_box_pack_start(GTK_BOX(box2), tmpw,FALSE,FALSE,0);
gtk_widget_show (tmpw);
}
tmpw = gtk_label_new( _("Aspect ratio:"));
gtk_box_pack_start(GTK_BOX(box2), tmpw,FALSE,FALSE,0);
gtk_widget_show (tmpw);
tmpw = gtk_label_new( _("Relief:"));
gtk_box_pack_start(GTK_BOX(box2), tmpw,FALSE,FALSE,0);
gtk_widget_show (tmpw);
box2 = gtk_vbox_new (TRUE, 0);
gtk_box_pack_start(GTK_BOX(box1), box2,FALSE,FALSE,10);
gtk_widget_show (box2);
if(!standalone) {
GtkWidget *emptyitem;
box3 = gtk_hbox_new(FALSE,0);
gtk_box_pack_start(GTK_BOX(box2),box3, FALSE, FALSE, 0);
gtk_widget_show(box3);
brushemptyitem = emptyitem = gtk_menu_item_new_with_label( _("(None)"));
gtk_signal_connect (GTK_OBJECT(emptyitem), "activate",
(GtkSignalFunc)dummybrushdmenuselect, NULL);
gtk_widget_show(emptyitem);
tmpw = gtk_option_menu_new();
gtk_box_pack_start(GTK_BOX(box3),tmpw, FALSE, FALSE, 0);
gtk_widget_show(tmpw);
brushdrawablemenu = dmenu = gimp_drawable_menu_new(validdrawable, brushdmenuselect, NULL, -1);
gtk_menu_prepend(GTK_MENU(dmenu), emptyitem);
gtk_option_menu_set_menu(GTK_OPTION_MENU(tmpw), dmenu);
tmpw = gtk_button_new_with_label( _("Save..."));
gtk_box_pack_start(GTK_BOX(box3),tmpw, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT(tmpw), "clicked",
GTK_SIGNAL_FUNC(savebrush), NULL);
gtk_widget_show(tmpw);
}
brushaspectadjust = gtk_adjustment_new(pcvals.brushaspect, -1.0, 2.0, 0.1, 0.1, 1.0);
tmpw = gtk_hscale_new(GTK_ADJUSTMENT(brushaspectadjust));
gtk_widget_set_usize (GTK_WIDGET(tmpw), 150, 30);
gtk_scale_set_draw_value (GTK_SCALE (tmpw), TRUE);
gtk_scale_set_digits(GTK_SCALE (tmpw), 2);
gtk_box_pack_start (GTK_BOX (box2), tmpw, FALSE, FALSE, 0);
gtk_widget_show (tmpw);
gtk_tooltips_set_tip(GTK_TOOLTIPS(tooltips), tmpw, _("Specifies the aspect ratio of the brush"), NULL);
gtk_signal_connect(GTK_OBJECT(brushaspectadjust), "value_changed",
(GtkSignalFunc)selectbrush, list);
brushreliefadjust = gtk_adjustment_new(pcvals.brushrelief, 0.0, 101.0, 1.0, 1.0, 1.0);
tmpw = gtk_hscale_new(GTK_ADJUSTMENT(brushreliefadjust));
gtk_widget_set_usize (GTK_WIDGET(tmpw), 150, 30);
gtk_scale_set_draw_value (GTK_SCALE (tmpw), TRUE);
gtk_scale_set_digits(GTK_SCALE (tmpw), 2);
gtk_box_pack_start (GTK_BOX (box2), tmpw, FALSE, FALSE, 0);
gtk_widget_show (tmpw);
gtk_tooltips_set_tip(GTK_TOOLTIPS(tooltips), tmpw, _("Specifies the amount of embossing to apply to each brush stroke"), NULL);
gtk_signal_connect (GTK_OBJECT(list), "selection_changed",
GTK_SIGNAL_FUNC(selectbrushfile),
list);
if(!GTK_LIST(list)->selection)
gtk_list_select_item(GTK_LIST(list), 0);
selectbrush(NULL, list);
gtk_notebook_append_page_menu (notebook, thispage, labelbox, menubox);
}
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