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gimp/plug-ins/gimpressionist/brush.c

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#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef __GNUC__
#warning GTK_DISABLE_DEPRECATED
#endif
#undef GTK_DISABLE_DEPRECATED
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include <libgimpmath/gimpmath.h>
#include <gtk/gtklist.h>
#include <gtk/gtkpreview.h>
#include "gimpressionist.h"
#include "ppmtool.h"
#include <libgimp/stdplugins-intl.h>
GtkWidget *brushlist = NULL;
GtkObject *brushreliefadjust = NULL;
GtkObject *brushaspectadjust = NULL;
GtkObject *brushgammaadjust = NULL;
gint brushfile = 2;
ppm_t brushppm = {0, 0, NULL};
static GtkWidget *brushprev = NULL;
static GtkListStore *brushstore = NULL;
static void updatebrushprev (const char *fn);
static gboolean colorfile (const char *fn)
{
return fn && strstr(fn, ".ppm");
}
static void
brushdmenuselect (GtkWidget *widget,
gpointer data)
{
GimpPixelRgn src_rgn;
guchar *src_row;
guchar *src;
gint id;
gint alpha, has_alpha, bpp;
gint x, y;
ppm_t *p;
gint x1, y1, x2, y2;
gint row, col;
GimpDrawable *drawable;
gint rowstride;
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &id);
if (id == -1)
return;
if (brushfile == 2)
return; /* Not finished GUI-building yet */
if (brushfile)
{
/* unselectall(brushlist); */
if (GTK_IS_WIDGET (presetsavebutton))
gtk_widget_set_sensitive (GTK_WIDGET (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->drawable_id, &x1, &y1, &x2, &y2);
bpp = gimp_drawable_bpp (drawable->drawable_id);
has_alpha = gimp_drawable_has_alpha (drawable->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);
}
static void
brushlistrefresh (void)
{
gtk_list_store_clear (brushstore);
readdirintolist("Brushes", brushlist, NULL);
}
static void
savebrush_response (GtkWidget *dialog,
gint response_id,
gpointer data)
{
if (response_id == GTK_RESPONSE_OK)
{
gchar *name = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
saveppm (&brushppm, name);
brushlistrefresh ();
g_free (name);
}
gtk_widget_destroy (dialog);
}
static void
savebrush (GtkWidget *wg,
gpointer data)
{
static GtkWidget *dialog = NULL;
GList *thispath = parsepath ();
gchar *path;
if (! brushppm.col)
{
g_message( _("Can only save drawables!"));
return;
}
dialog =
gtk_file_chooser_dialog_new (_("Save Brush"),
GTK_WINDOW (gtk_widget_get_toplevel (wg)),
GTK_FILE_CHOOSER_ACTION_SAVE,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_SAVE, GTK_RESPONSE_OK,
NULL);
path = g_build_filename ((gchar *)thispath->data, "Brushes", NULL);
gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (dialog), path);
g_free (path);
g_signal_connect (dialog, "destroy",
G_CALLBACK (gtk_widget_destroyed),
&dialog);
g_signal_connect (dialog, "response",
G_CALLBACK (savebrush_response),
NULL);
gtk_widget_show (dialog);
}
static gboolean
validdrawable (gint32 imageid,
gint32 drawableid,
gpointer data)
{
return (gimp_drawable_is_rgb (drawableid) ||
gimp_drawable_is_gray (drawableid));
}
void
reloadbrush (const gchar *fn,
ppm_t *p)
{
static char lastfn[256] = "";
static ppm_t cache = {0,0,NULL};
if (strcmp(fn, lastfn))
{
g_strlcpy (lastfn, fn, sizeof (lastfn));
loadppm (fn, &cache);
}
copyppm(&cache, p);
pcvals.colorbrushes = colorfile(fn);
}
static void
padbrush (ppm_t *p,
gint width,
gint 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);
}
static void
updatebrushprev (const gchar *fn)
{
gint i, j;
guchar 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;
ppm_t 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_queue_draw (brushprev);
}
static gboolean brushdontupdate = FALSE;
static void
selectbrush (GtkTreeSelection *selection, gpointer data)
{
GtkTreeIter iter;
GtkTreeModel *model;
if (brushdontupdate)
return;
if (brushfile == 0)
{
updatebrushprev (NULL);
return;
}
if (gtk_tree_selection_get_selected (selection, &model, &iter))
{
gchar *brush;
gtk_tree_model_get (model, &iter, 0, &brush, -1);
brushdontupdate = TRUE;
gtk_adjustment_set_value(GTK_ADJUSTMENT(brushgammaadjust), 1.0);
gtk_adjustment_set_value(GTK_ADJUSTMENT(brushaspectadjust), 0.0);
brushdontupdate = FALSE;
if (brush)
{
gchar *fname = g_build_filename ("Brushes", brush, NULL);
g_strlcpy (pcvals.selectedbrush,
fname, sizeof (pcvals.selectedbrush));
updatebrushprev (fname);
g_free (fname);
g_free (brush);
}
}
}
static void
selectbrushfile (GtkTreeSelection *selection, gpointer data)
{
brushfile = 1;
gtk_widget_set_sensitive (presetsavebutton, TRUE);
selectbrush (selection, NULL);
}
static void
brushaspectadjust_cb (GtkWidget *w, gpointer data)
{
gimp_double_adjustment_update (GTK_ADJUSTMENT(w), data);
updatebrushprev (pcvals.selectedbrush);
}
void
create_brushpage(GtkNotebook *notebook)
{
GtkWidget *box1, *box2, *box3, *thispage;
GtkWidget *view;
GtkWidget *tmpw, *table;
GtkWidget *combo;
GtkWidget *label;
GtkTreeSelection *selection;
label = gtk_label_new_with_mnemonic (_("_Brush"));
thispage = gtk_vbox_new(FALSE, 0);
gtk_container_set_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);
view = createonecolumnlist (box1, selectbrushfile);
brushlist = view;
brushstore = GTK_LIST_STORE (gtk_tree_view_get_model (GTK_TREE_VIEW (view)));
selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (view));
box2 = gtk_vbox_new (FALSE, 0);
gtk_box_pack_start(GTK_BOX(box1), box2,FALSE,FALSE,0);
gtk_widget_show (box2);
gtk_container_set_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_size_request (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);
g_signal_connect_swapped (brushgammaadjust, "value_changed",
G_CALLBACK(updatebrushprev), pcvals.selectedbrush);
gimp_help_set_help_data
(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);
box3 = gtk_hbox_new(FALSE,0);
gtk_box_pack_start(GTK_BOX(box2),box3, FALSE, FALSE, 0);
gtk_widget_show(box3);
tmpw = gtk_label_new( _("Select:"));
gtk_box_pack_start(GTK_BOX(box3), tmpw,FALSE,FALSE,0);
gtk_widget_show (tmpw);
combo = gimp_drawable_combo_box_new (validdrawable, NULL);
gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), -1,
G_CALLBACK (brushdmenuselect),
NULL);
gtk_box_pack_start(GTK_BOX (box3), combo, FALSE, FALSE, 0);
gtk_widget_show (combo);
tmpw = gtk_button_new_from_stock (GTK_STOCK_SAVE_AS);
gtk_box_pack_start(GTK_BOX(box3),tmpw, FALSE, FALSE, 0);
g_signal_connect (tmpw, "clicked", G_CALLBACK(savebrush), NULL);
gtk_widget_show(tmpw);
table = gtk_table_new (2, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE(table), 4);
gtk_box_pack_start(GTK_BOX(box2), table, FALSE, FALSE, 0);
gtk_widget_show (table);
brushaspectadjust =
gimp_scale_entry_new (GTK_TABLE(table), 0, 0,
_("Aspect ratio:"),
150, -1, pcvals.brushaspect,
-1.0, 1.0, 0.1, 0.1, 2,
TRUE, 0, 0,
_("Specifies the aspect ratio of the brush"),
NULL);
g_signal_connect (brushaspectadjust, "value_changed",
G_CALLBACK (brushaspectadjust_cb), &pcvals.brushaspect);
brushreliefadjust =
gimp_scale_entry_new (GTK_TABLE(table), 0, 1,
_("Relief:"),
150, -1, pcvals.brushrelief,
0.0, 100.0, 1.0, 10.0, 1,
TRUE, 0, 0,
_("Specifies the amount of embossing to apply to the image (in percent)"),
NULL);
g_signal_connect (brushreliefadjust, "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
&pcvals.brushrelief);
selectbrush(selection, NULL);
readdirintolist("Brushes", view, pcvals.selectedbrush);
gtk_notebook_append_page_menu (notebook, thispage, label, NULL);
}
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