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-rw-r--r--plug-ins/gimpressionist/brush.c660
1 files changed, 660 insertions, 0 deletions
diff --git a/plug-ins/gimpressionist/brush.c b/plug-ins/gimpressionist/brush.c
new file mode 100644
index 0000000..a5d1e59
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+++ b/plug-ins/gimpressionist/brush.c
@@ -0,0 +1,660 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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 3 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#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 void update_brush_preview (const char *fn);
+
+
+static GtkWidget *brush_preview = NULL;
+static GtkListStore *brush_list_store = NULL;
+
+static GtkWidget *brush_list = NULL;
+static GtkAdjustment *brush_relief_adjust = NULL;
+static GtkAdjustment *brush_aspect_adjust = NULL;
+static GtkAdjustment *brush_gamma_adjust = NULL;
+static gboolean brush_dont_update = FALSE;
+
+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.selected_brush);
+ gtk_adjustment_set_value (brush_gamma_adjust, pcvals.brushgamma);
+ gtk_adjustment_set_value (brush_relief_adjust, pcvals.brush_relief);
+ gtk_adjustment_set_value (brush_aspect_adjust, pcvals.brush_aspect);
+}
+
+void
+brush_store (void)
+{
+ pcvals.brushgamma = gtk_adjustment_get_value (brush_gamma_adjust);
+}
+
+void
+brush_free (void)
+{
+ g_free (last_selected_brush);
+}
+
+void brush_get_selected (ppm_t *p)
+{
+ if (brush_from_file)
+ brush_reload (pcvals.selected_brush, p);
+ else
+ ppm_copy (&brushppm, p);
+}
+
+
+static gboolean
+file_is_color (const char *fn)
+{
+ return fn && strstr (fn, ".ppm");
+}
+
+void
+set_colorbrushes (const gchar *fn)
+{
+ pcvals.color_brushes = file_is_color (fn);
+}
+
+static const Babl *
+get_u8_format (gint32 drawable_id)
+{
+ if (gimp_drawable_is_rgb (drawable_id))
+ {
+ if (gimp_drawable_has_alpha (drawable_id))
+ return babl_format ("R'G'B'A u8");
+ else
+ return babl_format ("R'G'B' u8");
+ }
+ else
+ {
+ if (gimp_drawable_has_alpha (drawable_id))
+ return babl_format ("Y'A u8");
+ else
+ return babl_format ("Y' u8");
+ }
+}
+
+static void
+brushdmenuselect (GtkWidget *widget,
+ gpointer data)
+{
+ GeglBuffer *src_buffer;
+ const Babl *format;
+ guchar *src_row;
+ guchar *src;
+ gint bpp;
+ gint x, y;
+ ppm_t *p;
+ gint x1, y1, w, h;
+ gint row;
+ gint32 drawable_id;
+ gint rowstride;
+
+ gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &drawable_id);
+
+ if (drawable_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 (brush_gamma_adjust, 1.0);
+ gtk_adjustment_set_value (brush_aspect_adjust, 0.0);
+
+ if (! gimp_drawable_mask_intersect (drawable_id, &x1, &y1, &w, &h))
+ return;
+
+ format = get_u8_format (drawable_id);
+ bpp = babl_format_get_bytes_per_pixel (format);
+
+ ppm_kill (&brushppm);
+ ppm_new (&brushppm, w, h);
+ p = &brushppm;
+
+ rowstride = p->width * 3;
+
+ src_row = g_new (guchar, w * bpp);
+
+ src_buffer = gimp_drawable_get_buffer (drawable_id);
+
+ if (bpp == 3)
+ { /* RGB */
+ gint bpr = w * 3;
+ gint y2 = y1 + h;
+
+ for (row = 0, y = y1; y < y2; row++, y++)
+ {
+ gegl_buffer_get (src_buffer, GEGL_RECTANGLE (x1, y, w, 1), 1.0,
+ format, src_row,
+ GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+ memcpy (p->col + row*rowstride, src_row, bpr);
+ }
+ }
+ else
+ { /* RGBA (bpp > 3) GrayA (bpp == 2) or Gray */
+ gboolean is_gray = ((bpp > 3) ? TRUE : FALSE);
+ gint y2 = y1 + h;
+
+ for (row = 0, y = y1; y < y2; row++, y++)
+ {
+ guchar *tmprow = p->col + row * rowstride;
+ guchar *tmprow_ptr;
+ gint x2 = x1 + w;
+
+ gegl_buffer_get (src_buffer, GEGL_RECTANGLE (x1, y, w, 1), 1.0,
+ format, src_row,
+ GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+ src = src_row;
+ tmprow_ptr = tmprow;
+ /* Possible micro-optimization here:
+ * src_end = src + src_rgn.bpp * w);
+ * 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 += bpp;
+ }
+ }
+ }
+
+ g_object_unref (src_buffer);
+
+ g_free (src_row);
+
+ if (bpp >= 3)
+ pcvals.color_brushes = 1;
+ else
+ pcvals.color_brushes = 0;
+
+ brush_from_file = 0;
+ update_brush_preview (NULL);
+}
+
+#if 0
+void
+dummybrushdmenuselect (GtkWidget *w, gpointer data)
+{
+ 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)
+{
+ GtkWidget *dialog = NULL;
+ GList *thispath = parsepath ();
+ gchar *path;
+
+ if (! PPM_IS_INITED (&brushppm))
+ {
+ 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,
+
+ _("_Cancel"), GTK_RESPONSE_CANCEL,
+ _("_Save"), GTK_RESPONSE_OK,
+
+ NULL);
+
+ gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_OK);
+ gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
+ GTK_RESPONSE_OK,
+ GTK_RESPONSE_CANCEL,
+ -1);
+
+ gtk_file_chooser_set_do_overwrite_confirmation (GTK_FILE_CHOOSER (dialog),
+ TRUE);
+
+ 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 *preview_image;
+
+ if (fn)
+ brush_from_file = 1;
+
+ preview_image = g_new0 (guchar, 100*100);
+
+ if (!fn && brush_from_file)
+ {
+ /* preview_image is already initialized to our liking. */
+ }
+ else
+ {
+ double sc;
+ ppm_t p = {0, 0, NULL};
+ guchar gammatable[256];
+ int newheight;
+
+ if (brush_from_file)
+ brush_reload (fn, &p);
+ else if (PPM_IS_INITED (&brushppm))
+ ppm_copy (&brushppm, &p);
+
+ set_colorbrushes (fn);
+
+ sc = gtk_adjustment_get_value (brush_gamma_adjust);
+ 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_get_value (brush_aspect_adjust));
+
+ 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;
+ if (i < p.height)
+ for (j = 0; j < p.width; j++)
+ preview_image[i*100+j] = gammatable[p.col[k + j * 3]];
+ }
+ ppm_kill (&p);
+ }
+ gimp_preview_area_draw (GIMP_PREVIEW_AREA (brush_preview),
+ 0, 0, 100, 100,
+ GIMP_GRAY_IMAGE,
+ preview_image,
+ 100);
+
+ g_free (preview_image);
+}
+
+
+/*
+ * "force" implies here to change the brush even if it was the same.
+ * It is used for the initialization of the preview.
+ * */
+static void
+brush_select (GtkTreeSelection *selection, gboolean force)
+{
+ 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))
+ {
+ if (!force)
+ {
+ goto cleanup;
+ }
+ }
+ else
+ {
+ g_free (last_selected_brush);
+ last_selected_brush = g_strdup (brush);
+ }
+ }
+
+ brush_dont_update = TRUE;
+ gtk_adjustment_set_value (brush_gamma_adjust, 1.0);
+ gtk_adjustment_set_value (brush_aspect_adjust, 0.0);
+ brush_dont_update = FALSE;
+
+ if (brush)
+ {
+ fname = g_build_filename ("Brushes", brush, NULL);
+
+ g_strlcpy (pcvals.selected_brush,
+ fname, sizeof (pcvals.selected_brush));
+
+ update_brush_preview (fname);
+
+ }
+ }
+cleanup:
+ g_free (fname);
+ g_free (brush);
+}
+
+static void
+brush_select_file (GtkTreeSelection *selection, gpointer data)
+{
+ brush_from_file = 1;
+ preset_save_button_set_sensitive (TRUE);
+ brush_select (selection, FALSE);
+}
+
+static void
+brush_preview_size_allocate (GtkWidget *preview)
+{
+ GtkTreeSelection *selection;
+
+ selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (brush_list));
+ brush_select (selection, TRUE);
+}
+
+static void
+brush_asepct_adjust_cb (GtkWidget *w, gpointer data)
+{
+ gimp_double_adjustment_update (GTK_ADJUSTMENT (w), data);
+ update_brush_preview (pcvals.selected_brush);
+}
+
+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_box_new (GTK_ORIENTATION_VERTICAL, 12);
+ gtk_container_set_border_width (GTK_CONTAINER (thispage), 12);
+ gtk_widget_show (thispage);
+
+ box1 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 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_box_new (GTK_ORIENTATION_VERTICAL, 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 = gimp_preview_area_new ();
+ gtk_widget_set_size_request (brush_preview, 100, 100);
+ gtk_container_add (GTK_CONTAINER (frame), tmpw);
+ gtk_widget_show (tmpw);
+ g_signal_connect (brush_preview, "size-allocate",
+ G_CALLBACK (brush_preview_size_allocate), NULL);
+
+ box3 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
+ gtk_box_pack_end (GTK_BOX (box2), box3, FALSE, FALSE,0);
+ gtk_widget_show (box3);
+
+ tmpw = gtk_label_new (_("Gamma:"));
+ gtk_label_set_xalign (GTK_LABEL (tmpw), 0.0);
+ gtk_box_pack_start (GTK_BOX (box3), tmpw, FALSE, FALSE,0);
+ gtk_widget_show (tmpw);
+
+ brush_gamma_adjust = GTK_ADJUSTMENT (gtk_adjustment_new (pcvals.brushgamma,
+ 0.5, 3.0, 0.1, 0.1, 1.0));
+ tmpw = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, 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.selected_brush);
+
+ gimp_help_set_help_data
+ (tmpw, _("Changes the gamma (brightness) of the selected brush"), NULL);
+
+ box3 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 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_label_set_xalign (GTK_LABEL (tmpw), 0.0);
+ 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_with_mnemonic (_("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 = (GtkAdjustment *)
+ gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
+ _("Aspect ratio:"),
+ 150, -1, pcvals.brush_aspect,
+ -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.brush_aspect);
+
+ brush_relief_adjust = (GtkAdjustment *)
+ gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
+ _("Relief:"),
+ 150, -1, pcvals.brush_relief,
+ 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.brush_relief);
+
+ brush_select (selection, FALSE);
+ readdirintolist ("Brushes", view, pcvals.selected_brush);
+
+ /*
+ * 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);
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-19 00:45:58 +0000