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gimp/plug-ins/gimpressionist/brush.c

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#include "config.h"
#include <string.h>
#ifdef __GNUC__
#warning GTK_DISABLE_DEPRECATED
#endif
#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 "brush.h"
#include "presets.h"
#include <libgimp/stdplugins-intl.h>
static GtkWidget *brush_preview = NULL;
static GtkListStore *brush_list_store = NULL;
static GtkWidget *brush_list = NULL;
static GtkObject *brush_relief_adjust = NULL;
static GtkObject *brush_aspect_adjust = NULL;
static GtkObject *brush_gamma_adjust = NULL;
static gchar *last_selected_brush = NULL;
static gint brush_from_file = 2;
static ppm_t brushppm = {0, 0, NULL};
void brush_restore(void)
{
reselect (brush_list, pcvals.selectedbrush);
gtk_adjustment_set_value (GTK_ADJUSTMENT(brush_gamma_adjust), pcvals.brushgamma);
gtk_adjustment_set_value (GTK_ADJUSTMENT(brush_relief_adjust), pcvals.brushrelief);
gtk_adjustment_set_value (GTK_ADJUSTMENT(brush_aspect_adjust), pcvals.brushaspect);
}
void brush_store(void)
{
pcvals.brushgamma = GTK_ADJUSTMENT(brush_gamma_adjust)->value;
}
void brush_free(void)
{
g_free (last_selected_brush);
}
void brush_get_selected (ppm_t *p)
{
if(brush_from_file)
brush_reload (pcvals.selectedbrush, p);
else
ppm_copy (&brushppm, p);
}
static void update_brush_preview (const char *fn);
static gboolean file_is_color (const char *fn)
{
return fn && strstr (fn, ".ppm");
}
void set_colorbrushes (const gchar *fn)
{
pcvals.colorbrushes = file_is_color(fn);
}
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;
GimpDrawable *drawable;
gint rowstride;
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &id);
if (id == -1)
return;
if (brush_from_file == 2)
return; /* Not finished GUI-building yet */
if (brush_from_file)
{
#if 0
unselectall(brush_list);
#endif
preset_save_button_set_sensitive (FALSE);
}
gtk_adjustment_set_value (GTK_ADJUSTMENT (brush_gamma_adjust), 1.0);
gtk_adjustment_set_value (GTK_ADJUSTMENT (brush_aspect_adjust), 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)
ppm_kill (&brushppm);
ppm_new (&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 { /* RGBA (bpp > 3) GrayA (bpp == 2) or Gray */
gboolean is_gray = ((bpp > 3) ? TRUE : FALSE);
for(row = 0, y = y1; y < y2; row++, y++) {
guchar *tmprow = p->col + row * rowstride;
guchar *tmprow_ptr;
gimp_pixel_rgn_get_row (&src_rgn, src_row, x1, y, (x2 - x1));
src = src_row;
tmprow_ptr = tmprow;
/* Possible micro-optimization here:
* src_end = src + src_rgn.bpp * (x2-x1);
* for( ; src < src_end ; src += src_rgn.bpp)
* */
for (x = x1; x < x2; x++) {
*(tmprow_ptr++) = src[0];
*(tmprow_ptr++) = src[is_gray ? 1 : 0];
*(tmprow_ptr++) = src[is_gray ? 2 : 0];
src += src_rgn.bpp;
}
}
}
g_free (src_row);
if(bpp >= 3) pcvals.colorbrushes = 1;
else pcvals.colorbrushes = 0;
brush_from_file = 0;
update_brush_preview(NULL);
}
#if 0
void dummybrushdmenuselect(GtkWidget *w, gpointer data)
{
if(brushppm.col)
ppm_kill (&brushppm);
ppm_new (&brushppm, 10,10);
brush_from_file = 0;
update_brush_preview (NULL);
}
#endif
static void
brushlistrefresh (void)
{
gtk_list_store_clear (brush_list_store);
readdirintolist ("Brushes", brush_list, 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));
ppm_save (&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));
}
/*
* This function caches the last result. Call it with fn as NULL, to
* free the arguments.
* */
void
brush_reload (const gchar *fn,
ppm_t *p)
{
static char lastfn[256] = "";
static ppm_t cache = {0,0,NULL};
if (fn == NULL)
{
ppm_kill (&cache);
lastfn[0] = '\0';
return;
}
if (strcmp(fn, lastfn))
{
g_strlcpy (lastfn, fn, sizeof (lastfn));
ppm_kill (&cache);
ppm_load (fn, &cache);
}
ppm_copy (&cache, p);
set_colorbrushes (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;
ppm_pad(p, left, right, top, bottom, black);
}
static void
update_brush_preview (const gchar *fn)
{
gint i, j;
guchar buf[100];
if(fn)
brush_from_file = 1;
if (!fn && brush_from_file) {
memset(buf, 0, 100);
for(i = 0; i < 100; i++) {
gtk_preview_draw_row (GTK_PREVIEW (brush_preview), buf, 0, i, 100);
}
} else {
double sc;
ppm_t p = {0,0,NULL};
guchar gammatable[256];
int newheight;
if (brush_from_file)
brush_reload (fn, &p);
else if (brushppm.col)
ppm_copy (&brushppm, &p);
set_colorbrushes (fn);
sc = GTK_ADJUSTMENT (brush_gamma_adjust)->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(brush_aspect_adjust)->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 (brush_preview), buf, 0, i, 100);
}
ppm_kill(&p);
}
gtk_widget_queue_draw (brush_preview);
}
static gboolean brush_dont_update = FALSE;
static void
brush_select (GtkTreeSelection *selection, gpointer data)
{
GtkTreeIter iter;
GtkTreeModel *model;
gchar *fname = NULL;
gchar *brush = NULL;
if (brush_dont_update)
goto cleanup;
if (brush_from_file == 0)
{
update_brush_preview (NULL);
goto cleanup;
}
if (gtk_tree_selection_get_selected (selection, &model, &iter))
{
gtk_tree_model_get (model, &iter, 0, &brush, -1);
/* Check if the same brush was selected twice, and if so
* break. Otherwise, the brush gamma and stuff would have been
* reset.
* */
if (last_selected_brush == NULL)
{
last_selected_brush = g_strdup(brush);
}
else
{
if (!strcmp (last_selected_brush, brush))
goto cleanup;
else
{
g_free (last_selected_brush);
last_selected_brush = g_strdup(brush);
}
}
brush_dont_update = TRUE;
gtk_adjustment_set_value(GTK_ADJUSTMENT(brush_gamma_adjust), 1.0);
gtk_adjustment_set_value(GTK_ADJUSTMENT(brush_aspect_adjust), 0.0);
brush_dont_update = FALSE;
if (brush)
{
fname = g_build_filename ("Brushes", brush, NULL);
g_strlcpy (pcvals.selectedbrush,
fname, sizeof (pcvals.selectedbrush));
update_brush_preview (fname);
}
}
cleanup:
g_free (fname);
g_free (brush);
return;
}
static void
brush_select_file (GtkTreeSelection *selection, gpointer data)
{
brush_from_file = 1;
preset_save_button_set_sensitive (TRUE);
brush_select (selection, NULL);
}
static void
brush_asepct_adjust_cb (GtkWidget *w, gpointer data)
{
gimp_double_adjustment_update (GTK_ADJUSTMENT(w), data);
update_brush_preview (pcvals.selectedbrush);
}
void
create_brushpage(GtkNotebook *notebook)
{
GtkWidget *box1, *box2, *box3, *thispage;
GtkWidget *view;
GtkWidget *tmpw, *table;
GtkWidget *frame;
GtkWidget *combo;
GtkWidget *label;
GtkSizeGroup *group;
GtkTreeSelection *selection;
label = gtk_label_new_with_mnemonic (_("_Brush"));
thispage = gtk_vbox_new(FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (thispage), 12);
gtk_widget_show(thispage);
box1 = gtk_hbox_new (FALSE, 12);
gtk_box_pack_start(GTK_BOX(thispage), box1, TRUE,TRUE,0);
gtk_widget_show (box1);
view = create_one_column_list (box1, brush_select_file);
brush_list = view;
brush_list_store =
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, 12);
gtk_box_pack_start(GTK_BOX(box1), box2, FALSE, FALSE, 0);
gtk_widget_show (box2);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start(GTK_BOX (box2), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
brush_preview = tmpw = gtk_preview_new (GTK_PREVIEW_GRAYSCALE);
gtk_preview_size (GTK_PREVIEW (tmpw), 100, 100);
gtk_container_add (GTK_CONTAINER (frame), tmpw);
gtk_widget_show (tmpw);
box3 = gtk_vbox_new (FALSE, 2);
gtk_box_pack_end (GTK_BOX (box2), box3, FALSE, FALSE,0);
gtk_widget_show (box3);
tmpw = gtk_label_new( _("Gamma:"));
gtk_misc_set_alignment (GTK_MISC (tmpw), 0.0, 0.5);
gtk_box_pack_start(GTK_BOX (box3), tmpw, FALSE, FALSE,0);
gtk_widget_show (tmpw);
brush_gamma_adjust = gtk_adjustment_new(pcvals.brushgamma, 0.5, 3.0, 0.1,
0.1, 1.0);
tmpw = gtk_hscale_new(GTK_ADJUSTMENT(brush_gamma_adjust));
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 (box3), tmpw, FALSE, FALSE, 0);
gtk_widget_show (tmpw);
g_signal_connect_swapped (brush_gamma_adjust, "value_changed",
G_CALLBACK(update_brush_preview), pcvals.selectedbrush);
gimp_help_set_help_data
(tmpw, _("Changes the gamma (brightness) of the selected brush"), NULL);
box3 = gtk_hbox_new (FALSE, 6);
gtk_box_pack_start(GTK_BOX (thispage), box3, FALSE, FALSE,0);
gtk_widget_show (box3);
group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
tmpw = gtk_label_new (_("Select:"));
gtk_misc_set_alignment (GTK_MISC (tmpw), 0.0, 0.5);
gtk_box_pack_start (GTK_BOX (box3), tmpw, FALSE, FALSE, 0);
gtk_widget_show (tmpw);
gtk_size_group_add_widget (group, tmpw);
g_object_unref (group);
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, TRUE, TRUE, 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), 6);
gtk_table_set_row_spacings (GTK_TABLE(table), 6);
gtk_box_pack_start(GTK_BOX (thispage), table, FALSE, FALSE, 0);
gtk_widget_show (table);
brush_aspect_adjust =
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);
gtk_size_group_add_widget (group,
GIMP_SCALE_ENTRY_LABEL (brush_aspect_adjust));
g_signal_connect (brush_aspect_adjust, "value_changed",
G_CALLBACK (brush_asepct_adjust_cb), &pcvals.brushaspect);
brush_relief_adjust =
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);
gtk_size_group_add_widget (group,
GIMP_SCALE_ENTRY_LABEL (brush_relief_adjust));
g_signal_connect (brush_relief_adjust, "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
&pcvals.brushrelief);
brush_select (selection, NULL);
readdirintolist ("Brushes", view, pcvals.selectedbrush);
/*
* This is so the "changed signal won't get sent to the brushes' list
* and reset the gamma and stuff.
* */
gtk_widget_grab_focus (brush_list);
gtk_notebook_append_page_menu (notebook, thispage, label, NULL);
}
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