288 lines
9.5 KiB
C
288 lines
9.5 KiB
C
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/*
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* Goat exercise plug-in by Øyvind Kolås, pippin@gimp.org
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*/
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/*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#define PIKA_DISABLE_COMPAR_CRUFT
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#include <libpika/pika.h>
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#include <libpika/pikaui.h>
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#include "libpika/stdplugins-intl.h"
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#define PLUG_IN_BINARY "goat-exercise-c"
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#define PLUG_IN_SOURCE PLUG_IN_BINARY ".c"
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#define PLUG_IN_PROC "plug-in-goat-exercise-c"
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#define PLUG_IN_ROLE "goat-exercise-c"
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#define GOAT_URI "https://gitlab.gnome.org/GNOME/pika/blob/master/extensions/goat-exercises/goat-exercise-c.c"
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typedef struct _Goat Goat;
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typedef struct _GoatClass GoatClass;
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struct _Goat
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{
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PikaPlugIn parent_instance;
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};
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struct _GoatClass
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{
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PikaPlugInClass parent_class;
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};
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/* Declare local functions.
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*/
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#define GOAT_TYPE (goat_get_type ())
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#define GOAT (obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GOAT_TYPE, Goat))
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GType goat_get_type (void) G_GNUC_CONST;
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static GList * goat_query_procedures (PikaPlugIn *plug_in);
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static PikaProcedure * goat_create_procedure (PikaPlugIn *plug_in,
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const gchar *name);
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static PikaValueArray * goat_run (PikaProcedure *procedure,
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PikaRunMode run_mode,
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PikaImage *image,
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gint n_drawables,
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PikaDrawable **drawables,
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const PikaValueArray *args,
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gpointer run_data);
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G_DEFINE_TYPE (Goat, goat, PIKA_TYPE_PLUG_IN)
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PIKA_MAIN (GOAT_TYPE)
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static void
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goat_class_init (GoatClass *klass)
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{
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PikaPlugInClass *plug_in_class = PIKA_PLUG_IN_CLASS (klass);
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plug_in_class->query_procedures = goat_query_procedures;
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plug_in_class->create_procedure = goat_create_procedure;
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}
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static void
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goat_init (Goat *goat)
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{
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}
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static GList *
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goat_query_procedures (PikaPlugIn *plug_in)
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{
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return g_list_append (NULL, g_strdup (PLUG_IN_PROC));
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}
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static PikaProcedure *
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goat_create_procedure (PikaPlugIn *plug_in,
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const gchar *name)
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{
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PikaProcedure *procedure = NULL;
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if (! strcmp (name, PLUG_IN_PROC))
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{
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procedure = pika_image_procedure_new (plug_in, name,
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PIKA_PDB_PROC_TYPE_PLUGIN,
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goat_run, NULL, NULL);
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pika_procedure_set_image_types (procedure, "*");
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pika_procedure_set_sensitivity_mask (procedure,
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PIKA_PROCEDURE_SENSITIVE_DRAWABLE);
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pika_procedure_set_menu_label (procedure, _("Exercise in _C minor"));
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pika_procedure_set_icon_name (procedure, PIKA_ICON_GEGL);
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pika_procedure_add_menu_path (procedure,
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"<Image>/Filters/Development/Goat exercises/");
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pika_procedure_set_documentation (procedure,
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_("Exercise a goat in the C language"),
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"Takes a goat for a walk",
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PLUG_IN_PROC);
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pika_procedure_set_attribution (procedure,
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"Øyvind Kolås <pippin@gimp.org>",
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"Øyvind Kolås <pippin@gimp.org>",
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"21 march 2012");
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}
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return procedure;
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}
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static PikaValueArray *
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goat_run (PikaProcedure *procedure,
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PikaRunMode run_mode,
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PikaImage *image,
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gint n_drawables,
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PikaDrawable **drawables,
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const PikaValueArray *args,
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gpointer run_data)
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{
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PikaDrawable *drawable;
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PikaPDBStatusType status = PIKA_PDB_SUCCESS;
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gint x, y, width, height;
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if (n_drawables != 1)
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{
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GError *error = NULL;
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g_set_error (&error, PIKA_PLUG_IN_ERROR, 0,
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_("Procedure '%s' only works with one drawable."),
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PLUG_IN_PROC);
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return pika_procedure_new_return_values (procedure,
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PIKA_PDB_CALLING_ERROR,
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error);
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}
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else
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{
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drawable = drawables[0];
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}
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/* In interactive mode, display a dialog to advertise the exercise. */
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if (run_mode == PIKA_RUN_INTERACTIVE)
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{
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GtkTextBuffer *buffer;
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GtkWidget *dialog;
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GtkWidget *box;
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GtkWidget *widget;
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GtkWidget *scrolled;
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GFile *file;
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GFileInputStream *input;
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gchar *head_text;
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gchar *path;
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GdkGeometry geometry;
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gchar source_text[4096];
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gssize read;
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gint response;
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pika_ui_init (PLUG_IN_BINARY);
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dialog = pika_dialog_new (_("Exercise a goat (C)"), PLUG_IN_ROLE,
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NULL, GTK_DIALOG_USE_HEADER_BAR,
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pika_standard_help_func, PLUG_IN_PROC,
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_("_Cancel"), GTK_RESPONSE_CANCEL,
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_("_Source"), GTK_RESPONSE_APPLY,
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_("_Run"), GTK_RESPONSE_OK,
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NULL);
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geometry.min_aspect = 0.5;
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geometry.max_aspect = 1.0;
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gtk_window_set_geometry_hints (GTK_WINDOW (dialog), NULL,
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&geometry, GDK_HINT_ASPECT);
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box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
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gtk_container_set_border_width (GTK_CONTAINER (box), 12);
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gtk_container_add (GTK_CONTAINER (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
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box);
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gtk_widget_show (box);
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head_text = g_strdup_printf (_("This plug-in is an exercise in '%s' "
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"to demo plug-in creation.\n"
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"Check out the last version "
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"of the source code online by "
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"clicking the \"Source\" button."),
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"C");
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widget = gtk_label_new (head_text);
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g_free (head_text);
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gtk_box_pack_start (GTK_BOX (box), widget, FALSE, FALSE, 1);
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gtk_widget_show (widget);
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scrolled = gtk_scrolled_window_new (NULL, NULL);
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gtk_box_pack_start (GTK_BOX (box), scrolled, TRUE, TRUE, 1);
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gtk_widget_set_vexpand (GTK_WIDGET (scrolled), TRUE);
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gtk_widget_show (scrolled);
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path = g_build_filename (pika_plug_in_directory (), "extensions",
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"technology.heckin.extension.goat-exercises", PLUG_IN_SOURCE,
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NULL);
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file = g_file_new_for_path (path);
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g_free (path);
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widget = gtk_text_view_new ();
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gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (widget), GTK_WRAP_WORD);
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gtk_text_view_set_editable (GTK_TEXT_VIEW (widget), FALSE);
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buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (widget));
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input = g_file_read (file, NULL, NULL);
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while ((read = g_input_stream_read (G_INPUT_STREAM (input),
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source_text, 4096, NULL, NULL)) &&
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read != -1)
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{
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gtk_text_buffer_insert_at_cursor (buffer, source_text, read);
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}
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g_object_unref (file);
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gtk_container_add (GTK_CONTAINER (scrolled), widget);
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gtk_widget_show (widget);
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while ((response = pika_dialog_run (PIKA_DIALOG (dialog))))
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{
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if (response == GTK_RESPONSE_OK)
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{
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gtk_widget_destroy (dialog);
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break;
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}
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else if (response == GTK_RESPONSE_APPLY)
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{
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/* Show the code. */
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g_app_info_launch_default_for_uri (GOAT_URI, NULL, NULL);
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continue;
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}
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else /* CANCEL, CLOSE, DELETE_EVENT */
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{
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gtk_widget_destroy (dialog);
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return pika_procedure_new_return_values (procedure,
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PIKA_PDB_CANCEL,
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NULL);
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}
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}
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}
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if (pika_drawable_mask_intersect (drawable, &x, &y, &width, &height))
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{
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GeglBuffer *buffer;
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GeglBuffer *shadow_buffer;
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gegl_init (NULL, NULL);
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buffer = pika_drawable_get_buffer (drawable);
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shadow_buffer = pika_drawable_get_shadow_buffer (drawable);
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gegl_render_op (buffer, shadow_buffer, "gegl:invert", NULL);
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g_object_unref (shadow_buffer); /* flushes the shadow tiles */
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g_object_unref (buffer);
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pika_drawable_merge_shadow (drawable, TRUE);
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pika_drawable_update (drawable, x, y, width, height);
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pika_displays_flush ();
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gegl_exit ();
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}
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return pika_procedure_new_return_values (procedure, status, NULL);
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}
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