gimp/plug-ins/gimpressionist/brush.c

#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;
static GtkWidget *brushprev = NULL;
GtkObject *brushreliefadjust = NULL;
GtkObject *brushaspectadjust = NULL;
GtkObject *brushgammaadjust = NULL;
static GtkListStore *brushstore;

GtkWidget *brushdrawablemenu = NULL;
static GtkWidget *brushemptyitem;

gint32 brushdrawableid;

int brushfile = 2;

ppm_t brushppm = {0,0,NULL};

static void updatebrushprev(char *fn);

static gboolean colorfile(char *fn)
{
  return fn && strstr(fn, ".ppm");
}

static void brushdmenuselect(gint32 id, gpointer data)
{
  GimpPixelRgn src_rgn;
  guchar *src_row;
  guchar *src;
  gint alpha, has_alpha, bpp;
  gint x, y;
  ppm_t *p;
  gint x1, y1, x2, y2;
  gint row, col;
  GimpDrawable *drawable;
  int rowstride;

  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 destroy_window (GtkWidget *widget, GtkWidget **window)
{
  *window = NULL;
}

static void brushlistrefresh(void)
{
  gtk_list_store_clear (brushstore);
  readdirintolist("Brushes", brushlist, NULL);
}

void savebrush_ok(GtkWidget *w, GtkFileSelection *fs, gpointer data)
{
  const gchar *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( _("Can only save drawables!"));
    return;
  }

  sprintf(path, "%s/Brushes/", (char *)thispath->data);

  window = gtk_file_selection_new( _("Save brush"));
  gtk_window_set_position (GTK_WINDOW (window), GTK_WIN_POS_MOUSE);

  gtk_file_selection_set_filename (GTK_FILE_SELECTION (window), path);

  g_signal_connect (window, "destroy",
                    G_CALLBACK (destroy_window), &window);
  
  g_signal_connect (GTK_FILE_SELECTION (window)->ok_button, "clicked",
                    G_CALLBACK (savebrush_ok), window);

  g_signal_connect_swapped (GTK_FILE_SELECTION (window)->cancel_button,
                            "clicked",
                            G_CALLBACK (gtk_widget_destroy),
			    window);
  gtk_widget_show(window);

  return;
}

static gboolean 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, ppm_t *p)
{
  static char lastfn[200] = "";
  static ppm_t cache = {0,0,NULL};

  if(strcmp(fn, lastfn)) {
    strncpy(lastfn, fn, 199);
    loadppm(fn, &cache);
  }
  copyppm(&cache, p);
  pcvals.colorbrushes = colorfile(fn);
}

static void padbrush(ppm_t *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;
    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;
  char fname[200];

  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;

      sprintf(fname, "Brushes/%s", brush);
      strcpy(pcvals.selectedbrush, fname);
      
      updatebrushprev(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 *dmenu;
  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);

  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) {
    GtkWidget *emptyitem;

    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);

    brushemptyitem = emptyitem = gtk_menu_item_new_with_label( _("(None)"));
    g_signal_connect (emptyitem, "activate",
                      G_CALLBACK (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_shell_prepend (GTK_MENU_SHELL (dmenu), emptyitem);
    gtk_option_menu_set_menu(GTK_OPTION_MENU(tmpw), dmenu);
    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);
}