/**

  * $Id$

  *

  * Core GTK-based user interface

  *

  * Copyright (c) 2005 Nathan Keynes.

  *

  * 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 2 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.

  */

 #include <time.h>

 #include <stdlib.h>

 #include <unistd.h>

 #include <sys/time.h>

 #include <gtk/gtkversion.h>

 #include "lxdream.h"

 #include "dreamcast.h"

 #include "dream.h"

 #include "display.h"

 #include "gdrom/gdrom.h"

 #include "gtkui/gtkui.h"

 void gtk_gui_start( void );

 void gtk_gui_stop( void );

 void gtk_gui_alloc_resources ( void );

 uint32_t gtk_gui_run_slice( uint32_t nanosecs );

 struct dreamcast_module gtk_gui_module = { "gui", NULL,

         gtk_gui_update, 

         gtk_gui_start, 

         gtk_gui_run_slice, 

         gtk_gui_stop, 

         NULL, NULL };

 /**

  * Single-instance windows (at most one)

  */

 static main_window_t main_win = NULL;

 static debug_window_t debug_win = NULL;

 static mmio_window_t mmio_win = NULL;

 /**

  * UIManager and action helpers

  */

 static GtkUIManager *global_ui_manager;

 static GtkActionGroup *global_action_group;

 /**

  * Count of running nanoseconds - used to cut back on the GUI runtime

  */

 static uint32_t gtk_gui_nanos = 0;

 static uint32_t gtk_gui_ticks = 0;

 static struct timeval gtk_gui_lasttv;

 static gboolean gtk_gui_init_ok = FALSE;

 #define ENABLE_ACTION(win,name) SET_ACTION_ENABLED(win,name,TRUE)

 #define DISABLE_ACTION(win,name) SET_ACTION_ENABLED(win,name,FALSE)

 // UI Actions

 static const GtkActionEntry ui_actions[] = {

         { "FileMenu", NULL, N_("_File") },

         { "SettingsMenu", NULL, N_("_Settings") },

         { "HelpMenu", NULL, N_("_Help") },

         { "LoadBinary", NULL, N_("Load _Binary..."), NULL, N_("Load and run a program binary"), G_CALLBACK(load_binary_action_callback) },

         { "Reset", GTK_STOCK_REFRESH, N_("_Reset"), "<control>R", N_("Reset dreamcast"), G_CALLBACK(reset_action_callback) },

         { "Pause", GTK_STOCK_MEDIA_PAUSE, N_("_Pause"), NULL, N_("Pause dreamcast"), G_CALLBACK(pause_action_callback) },

         { "Run", GTK_STOCK_MEDIA_PLAY, N_("Resume"), NULL, N_("Resume"), G_CALLBACK(resume_action_callback) },

         { "LoadState", GTK_STOCK_REVERT_TO_SAVED, N_("L_oad State..."), "F4", N_("Load an lxdream save state"), G_CALLBACK(load_state_action_callback) },

         { "SaveState", GTK_STOCK_SAVE_AS, N_("S_ave State..."), "F3", N_("Create an lxdream save state"), G_CALLBACK(save_state_action_callback) },

         { "QuickLoad", NULL, N_("_Load Quick State"), "F6", N_("Load the current quick save state"), G_CALLBACK(quick_load_action_callback) },

         { "QuickSave", NULL, N_("_Save Quick State..."), "F5", N_("Save to the current quick save state"), G_CALLBACK(quick_save_action_callback) },

         { "QuickStateMenu", NULL, N_("Select _Quick State"), NULL, N_("Set quick save state") },

         { "Exit", GTK_STOCK_QUIT, N_("E_xit"), NULL, N_("Exit lxdream"), G_CALLBACK(exit_action_callback) },

         { "GdromSettings", NULL, N_("_GD-Rom") },

         { "GdromUnmount", NULL, N_("_Empty") },

         { "GdromMount", GTK_STOCK_CDROM, N_("_Open Image..."), "<control>O", N_("Mount a cdrom disc"), G_CALLBACK(mount_action_callback) },

         { "PathSettings", NULL, N_("_Paths..."), NULL, N_("Configure files and paths"), G_CALLBACK(path_settings_callback) }, 

         { "AudioSettings", NULL, N_("_Audio..."), NULL, N_("Configure audio output"), G_CALLBACK(audio_settings_callback) },

         { "ControllerSettings", NULL, N_("_Controllers..."), NULL, N_("Configure controllers"), G_CALLBACK(maple_settings_callback) },

         { "NetworkSettings", NULL, N_("_Network..."), NULL, N_("Configure network settings"), G_CALLBACK(network_settings_callback) },

         { "VideoSettings", NULL, N_("_Video..."), NULL,N_( "Configure video output"), G_CALLBACK(video_settings_callback) },

         { "HotkeySettings", NULL, N_("_Hotkeys..."), NULL,N_( "Configure hotkeys"), G_CALLBACK(hotkey_settings_callback) },

         { "About", GTK_STOCK_ABOUT, N_("_About..."), NULL, N_("About lxdream"), G_CALLBACK(about_action_callback) },

         { "DebugMenu", NULL, N_("_Debug") },

         { "Debugger", NULL, N_("_Debugger"), NULL, N_("Open debugger window"), G_CALLBACK(debugger_action_callback) },

         { "DebugMem", NULL, N_("View _Memory"), NULL, N_("View memory dump"), G_CALLBACK(debug_memory_action_callback) },

         { "DebugMmio", NULL, N_("View IO _Registers"), NULL, N_("View MMIO Registers"), G_CALLBACK(debug_mmio_action_callback) },

         { "SaveScene", NULL, N_("_Save Scene"), NULL, N_("Save next rendered scene"), G_CALLBACK(save_scene_action_callback) },

         { "SingleStep", GTK_STOCK_REDO, N_("_Single Step"), NULL, N_("Single step"), G_CALLBACK(debug_step_action_callback) },

         { "RunTo", GTK_STOCK_GOTO_LAST, N_("Run _To"), NULL, N_("Run to"), G_CALLBACK( debug_runto_action_callback) },

         { "SetBreakpoint", GTK_STOCK_CLOSE, N_("_Breakpoint"), NULL, N_("Toggle breakpoint"), G_CALLBACK( debug_breakpoint_action_callback) }

 };

 static const GtkToggleActionEntry ui_toggle_actions[] = {

         { "FullScreen", NULL, "_Full Screen", "<alt>Return", "Toggle full screen video", G_CALLBACK(fullscreen_toggle_callback), 0 },

 };

 static GtkRadioActionEntry ui_radio_actions[MAX_QUICK_STATE+1];

 // Menus and toolbars

 static const char *ui_description =

     "<ui>"

     " <menubar name='MainMenu'>"

     "  <menu action='FileMenu'>"

     "   <menuitem action='LoadBinary'/>"

     "   <menuitem action='GdromSettings'/>"

     "   <separator/>"

     "   <menuitem action='Reset'/>"

     "   <menuitem action='Pause'/>"

     "   <menuitem action='Run'/>"

     "   <menuitem action='Debugger'/>"

     "   <separator/>"

     "   <menuitem action='LoadState'/>"

     "   <menuitem action='SaveState'/>"

     "   <separator/>"

     "   <menuitem action='QuickLoad'/>"

     "   <menuitem action='QuickSave'/>"

     "   <menu action='QuickStateMenu'>"

     "    <menuitem action='QuickState0'/>"

     "    <menuitem action='QuickState1'/>"

     "    <menuitem action='QuickState2'/>"

     "    <menuitem action='QuickState3'/>"

     "    <menuitem action='QuickState4'/>"

     "    <menuitem action='QuickState5'/>"

     "    <menuitem action='QuickState6'/>"

     "    <menuitem action='QuickState7'/>"

     "    <menuitem action='QuickState8'/>"

     "    <menuitem action='QuickState9'/>"

     "   </menu>"

     "   <separator/>"

     "   <menuitem action='Exit'/>"

     "  </menu>"

     "  <menu action='SettingsMenu'>"

     "   <menuitem action='PathSettings'/>"

     "   <menuitem action='AudioSettings'/>"

     "   <menuitem action='ControllerSettings'/>"

     "   <menuitem action='NetworkSettings'/>"

     "   <menuitem action='VideoSettings'/>"

     "   <menuitem action='HotkeySettings'/>"

     "   <separator/>"

     "   <menuitem action='FullScreen'/>"

     "  </menu>"

     "  <menu action='HelpMenu'>"

     "   <menuitem action='About'/>"

     "  </menu>"

     " </menubar>"

     " <toolbar name='MainToolbar'>"

     "  <toolitem action='GdromMount'/>"

     "  <toolitem action='Reset'/>"

     "  <toolitem action='Pause'/>"

     "  <toolitem action='Run'/>"

     "  <separator/>"

     "  <toolitem action='LoadState'/>"

     "  <toolitem action='SaveState'/>"

     " </toolbar>"

     " <menubar name='DebugMenu'>"

     "  <menu action='FileMenu'>"

     "   <menuitem action='GdromSettings'/>"

     "   <separator/>"

     "   <menuitem action='Reset'/>"

     "   <separator/>"

     "   <menuitem action='LoadState'/>"

     "   <menuitem action='SaveState'/>"

     "   <separator/>"

     "   <menuitem action='QuickLoad'/>"

     "   <menuitem action='QuickSave'/>"

     "   <menu action='QuickStateMenu'>"

     "    <menuitem action='QuickState0'/>"

     "    <menuitem action='QuickState1'/>"

     "    <menuitem action='QuickState2'/>"

     "    <menuitem action='QuickState3'/>"

     "    <menuitem action='QuickState4'/>"

     "    <menuitem action='QuickState5'/>"

     "    <menuitem action='QuickState6'/>"

     "    <menuitem action='QuickState7'/>"

     "    <menuitem action='QuickState8'/>"

     "    <menuitem action='QuickState9'/>"

     "   </menu>"

     "   <separator/>"

     "   <menuitem action='Exit'/>"

     "  </menu>"

     "  <menu action='DebugMenu'>"

     "   <menuitem action='DebugMem'/>"

     "   <menuitem action='DebugMmio'/>"

     "   <menuitem action='SaveScene'/>"

     "   <separator/>"

     "   <menuitem action='SetBreakpoint'/>"

     "   <menuitem action='Pause'/>"

     "   <menuitem action='SingleStep'/>"

     "   <menuitem action='RunTo'/>"

     "   <menuitem action='Run'/>"

     "  </menu>"

     "  <menu action='SettingsMenu'>"

     "   <menuitem action='PathSettings'/>"

     "   <menuitem action='AudioSettings'/>"

     "   <menuitem action='ControllerSettings'/>"

     "   <menuitem action='NetworkSettings'/>"

     "   <menuitem action='VideoSettings'/>"

     "   <menuitem action='HotkeySettings'/>"

     "   <separator/>"

     "   <menuitem action='FullScreen'/>"

     "  </menu>"

     "  <menu action='HelpMenu'>"

     "   <menuitem action='About'/>"

     "  </menu>"

     " </menubar>"

     " <toolbar name='DebugToolbar'>"

     "  <toolitem action='GdromMount'/>"

     "  <toolitem action='Reset'/>"

     "  <toolitem action='Pause'/>"

     "  <separator/>"

     "  <toolitem action='SingleStep'/>"

     "  <toolitem action='RunTo'/>"

     "  <toolitem action='Run'/>"

     "  <toolitem action='SetBreakpoint'/>"

     "  <separator/>"

     "  <toolitem action='LoadState'/>"

     "  <toolitem action='SaveState'/>"

     " </toolbar>"

     "</ui>";

 gboolean gui_parse_cmdline( int *argc, char **argv[] )

 {

     gtk_gui_init_ok = gtk_init_check( argc, argv );

     return gtk_gui_init_ok;

 }

 gboolean gtk_gui_disc_changed( cdrom_disc_t disc, const gchar *disc_name, void *ptr )

 {

     main_window_update_title( main_win );

     return TRUE;

 }

 gboolean gui_init( gboolean withDebug, gboolean withFullscreen )

 {

     if( gtk_gui_init_ok ) {

         int i;

         GError *error = NULL;

         dreamcast_register_module( &gtk_gui_module );

         gtk_gui_alloc_resources();

         global_action_group = gtk_action_group_new("MenuActions");

         gtk_action_group_set_translation_domain( global_action_group, NULL );

         gtk_action_group_add_actions( global_action_group, ui_actions, G_N_ELEMENTS(ui_actions), NULL );

         gtk_action_group_add_toggle_actions( global_action_group, ui_toggle_actions, G_N_ELEMENTS(ui_toggle_actions), NULL );

         for( i=0; i<=MAX_QUICK_STATE; i++ ) {

             ui_radio_actions[i].name = g_strdup_printf("QuickState%d", i);

             ui_radio_actions[i].stock_id = NULL;

             ui_radio_actions[i].label = g_strdup_printf(_("State _%d"), i );

             ui_radio_actions[i].accelerator = NULL;

             ui_radio_actions[i].tooltip = g_strdup_printf(_("Use quick save state %d"),i);

             ui_radio_actions[i].value = i;

         }

         gtk_action_group_add_radio_actions( global_action_group, ui_radio_actions, G_N_ELEMENTS(ui_radio_actions), 

                                             dreamcast_get_quick_state(), G_CALLBACK(quick_state_action_callback), NULL );

         gtk_gui_enable_action("AudioSettings", FALSE);

         gtk_gui_enable_action("NetworkSettings", FALSE);

         gtk_gui_enable_action("VideoSettings", FALSE);

         global_ui_manager = gtk_ui_manager_new();

         gtk_ui_manager_set_add_tearoffs(global_ui_manager, TRUE);

         gtk_ui_manager_insert_action_group( global_ui_manager, global_action_group, 0 );

         if (!gtk_ui_manager_add_ui_from_string (global_ui_manager, ui_description, -1, &error)) {

             g_message ("building menus failed: %s", error->message);

             g_error_free (error);

             exit(1);

         }

         GtkAccelGroup *accel_group = gtk_ui_manager_get_accel_group (global_ui_manager);

         GtkWidget *menubar = gtk_ui_manager_get_widget(global_ui_manager, "/MainMenu");

         GtkWidget *toolbar = gtk_ui_manager_get_widget(global_ui_manager, "/MainToolbar");

         GtkWidget *gdrommenuitem = gtk_ui_manager_get_widget(global_ui_manager, "/MainMenu/FileMenu/GdromSettings");

         GtkWidget *gdrommenu = gdrom_menu_new();

         gtk_menu_item_set_submenu( GTK_MENU_ITEM(gdrommenuitem), gdrommenu );

         main_win = main_window_new( lxdream_package_name, menubar, toolbar, accel_group  );

         if( withDebug ) {

             gtk_gui_show_debugger();

         }

         if (withFullscreen) {

             main_window_set_fullscreen(main_win, TRUE);

             //manually call full-screen state code for non-compliant window managers

             main_window_show_gui(main_win, TRUE);

         }

         register_gdrom_disc_change_hook( gtk_gui_disc_changed, NULL );

         return TRUE;

     } else {

         return FALSE;

     }

 }

 void gui_main_loop( gboolean run )

 {

     gtk_gui_update();

     if( run ) {

         dreamcast_run();

         gtk_main();

     } else {

         gtk_main();

     }

 }

 void gui_update_state(void)

 {

     gtk_gui_update();

 }

 void gui_set_use_grab( gboolean flag )

 {

     if( main_win != NULL ) {

         main_window_set_use_grab(main_win, flag);

     }

 }

 gboolean gui_error_dialog( const char *msg, ... )

 {

     if( main_win != NULL ) {

         va_list args;

         GtkWidget *dialog = 

             gtk_message_dialog_new( main_window_get_frame(main_win), GTK_DIALOG_MODAL|GTK_DIALOG_DESTROY_WITH_PARENT,

                     GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE, NULL );

         va_start(args, msg);

         gchar *markup = g_markup_vprintf_escaped( msg, args );

         va_end( args );

         gtk_message_dialog_set_markup( GTK_MESSAGE_DIALOG(dialog), markup );

         g_free(markup);

         gtk_dialog_run(GTK_DIALOG(dialog));

         gtk_widget_destroy(dialog);

         return TRUE;

     }

     return FALSE;

 }

 void gui_update_io_activity( io_activity_type io, gboolean active )

 {

 }

 static gboolean gtk_do_later_callback( gpointer ptr )

 {

     do_later_callback_t func = (do_later_callback_t)ptr;

     func();

     return FALSE;

 }

 void gui_do_later( do_later_callback_t func )

 {

     g_timeout_add_seconds(0, gtk_do_later_callback, func);

 }

 void gtk_gui_show_debugger()

 {

     if( debug_win ) {

         debug_window_show(debug_win, TRUE);

     } else {

         GtkAccelGroup *accel_group = gtk_ui_manager_get_accel_group (global_ui_manager);

         GtkWidget *menubar = gtk_ui_manager_get_widget(global_ui_manager, "/DebugMenu");

         GtkWidget *toolbar = gtk_ui_manager_get_widget(global_ui_manager, "/DebugToolbar");

         GtkWidget *gdrommenuitem = gtk_ui_manager_get_widget(global_ui_manager, "/DebugMenu/FileMenu/GdromSettings");

         GtkWidget *gdrommenu = gdrom_menu_new();

         gtk_menu_item_set_submenu( GTK_MENU_ITEM(gdrommenuitem), gdrommenu );

         gchar *title = g_strdup_printf( "%s :: %s", lxdream_package_name, _("Debugger"));

         debug_win = debug_window_new( title, menubar, toolbar, accel_group  );

         g_free(title);

     }

 }

 void gtk_gui_show_mmio()

 {

     if( mmio_win ) {

         mmio_window_show(mmio_win, TRUE);

     } else {

         gchar *title = g_strdup_printf( "%s :: %s", lxdream_package_name, _("MMIO Registers"));

         mmio_win = mmio_window_new( title );

         g_free(title);

     }

 }

 main_window_t gtk_gui_get_main()

 {

     return main_win;

 }

 debug_window_t gtk_gui_get_debugger()

 {

     return debug_win;

 }

 mmio_window_t gtk_gui_get_mmio()

 {

     return mmio_win;

 }

 /**

  * Hook called when DC starts running. Just disables the run/step buttons

  * and enables the stop button.

  */

 void gtk_gui_start( void )

 {

     main_window_set_running( main_win, TRUE );

     if( debug_win != NULL ) {

         debug_window_set_running( debug_win, TRUE );

     }

     gtk_gui_nanos = 0;

     gettimeofday(&gtk_gui_lasttv,NULL);

 }

 /**

  * Hook called when DC stops running. Enables the run/step buttons

  * and disables the stop button.

  */

 void gtk_gui_stop( void )

 {

     main_window_set_running( main_win, FALSE );

     gtk_gui_update();

 }

 void gtk_gui_update( void )

 {

     if( global_action_group ) {

         gtk_gui_enable_action("Run", !dreamcast_is_running() );

         gtk_gui_enable_action("Pause", dreamcast_is_running() );

     }

     if( debug_win ) {

         debug_window_set_running( debug_win, FALSE );

         debug_window_update(debug_win);

     }

     if( mmio_win ) {

         mmio_window_update(mmio_win);

     }

     dump_window_update_all();

 }

 /**

  * Module run-slice. Run the event loop 100 times/second (doesn't really need to be

  * any more often than this), and update the speed display 10 times/second. 

  *

  * Also detect if we're running too fast here and yield for a bit

  */

 uint32_t gtk_gui_run_slice( uint32_t nanosecs ) 

 {

     gtk_gui_nanos += nanosecs;

     if( gtk_gui_nanos > GUI_TICK_PERIOD ) { /* 10 ms */

         gtk_gui_nanos -= GUI_TICK_PERIOD;

         gtk_gui_ticks ++;

         uint32_t current_period = gtk_gui_ticks * GUI_TICK_PERIOD;

         // Run the event loop

         while( gtk_events_pending() )

             gtk_main_iteration();	

         struct timeval tv;

         gettimeofday(&tv,NULL);

         uint32_t ns = ((tv.tv_sec - gtk_gui_lasttv.tv_sec) * 1000000000) + 

         (tv.tv_usec - gtk_gui_lasttv.tv_usec)*1000;

         if( (ns * 1.05) < current_period ) {

             // We've gotten ahead - sleep for a little bit

             struct timespec tv;

             tv.tv_sec = 0;

             tv.tv_nsec = current_period - ns;

             nanosleep(&tv, &tv);

         }

         /* Update the display every 10 ticks (ie 10 times a second) and 

          * save the current tv value */

         if( gtk_gui_ticks > 10 ) {

             gtk_gui_ticks -= 10;

             double speed = (float)( (double)current_period * 100.0 / ns );

             gtk_gui_lasttv.tv_sec = tv.tv_sec;

             gtk_gui_lasttv.tv_usec = tv.tv_usec;

             main_window_set_speed( main_win, speed );

         }

     }

     return nanosecs;

 }

 PangoFontDescription *gui_fixed_font;

 GdkColor gui_colour_normal, gui_colour_changed, gui_colour_error;

 GdkColor gui_colour_warn, gui_colour_pc, gui_colour_debug;

 GdkColor gui_colour_trace, gui_colour_break, gui_colour_temp_break;

 GdkColor gui_colour_white;

 void gtk_gui_alloc_resources() {

     GdkColormap *map;

     gui_colour_normal.red = gui_colour_normal.green = gui_colour_normal.blue = 0;

     gui_colour_changed.red = gui_colour_changed.green = 64*256;

     gui_colour_changed.blue = 154*256;

     gui_colour_error.red = 65535;

     gui_colour_error.green = gui_colour_error.blue = 64*256;

     gui_colour_pc.red = 32*256;

     gui_colour_pc.green = 170*256;

     gui_colour_pc.blue = 52*256;

     gui_colour_warn = gui_colour_changed;

     gui_colour_trace.red = 156*256;

     gui_colour_trace.green = 78*256;

     gui_colour_trace.blue = 201*256;

     gui_colour_debug = gui_colour_pc;

     gui_colour_break.red = 65535;

     gui_colour_break.green = gui_colour_break.blue = 192*256;

     gui_colour_temp_break.red = gui_colour_temp_break.green = 128*256;

     gui_colour_temp_break.blue = 32*256;

     gui_colour_white.red = gui_colour_white.green = gui_colour_white.blue = 65535;

     map = gdk_colormap_new(gdk_visual_get_best(), TRUE);

     gdk_colormap_alloc_color(map, &gui_colour_normal, TRUE, TRUE);

     gdk_colormap_alloc_color(map, &gui_colour_changed, TRUE, TRUE);

     gdk_colormap_alloc_color(map, &gui_colour_error, TRUE, TRUE);

     gdk_colormap_alloc_color(map, &gui_colour_warn, TRUE, TRUE);

     gdk_colormap_alloc_color(map, &gui_colour_pc, TRUE, TRUE);

     gdk_colormap_alloc_color(map, &gui_colour_debug, TRUE, TRUE);

     gdk_colormap_alloc_color(map, &gui_colour_trace, TRUE, TRUE);

     gdk_colormap_alloc_color(map, &gui_colour_break, TRUE, TRUE);

     gdk_colormap_alloc_color(map, &gui_colour_temp_break, TRUE, TRUE);

     gdk_colormap_alloc_color(map, &gui_colour_white, TRUE, TRUE);

     gui_fixed_font = pango_font_description_from_string("Courier 10");

 }

 gint gtk_gui_run_property_dialog( const gchar *title, GtkWidget *panel, gtk_dialog_done_fn fn )

 {

     GtkWidget *dialog =

         gtk_dialog_new_with_buttons(title, main_window_get_frame(main_win), 

                 GTK_DIALOG_MODAL|GTK_DIALOG_DESTROY_WITH_PARENT,

                 GTK_STOCK_OK, GTK_RESPONSE_ACCEPT,

                 GTK_STOCK_CANCEL, GTK_RESPONSE_REJECT,

                 NULL);

     gint result;

     gtk_widget_show_all(panel);

     gtk_container_add( GTK_CONTAINER(GTK_DIALOG(dialog)->vbox), panel );

     result = gtk_dialog_run( GTK_DIALOG(dialog) );

     if( fn != NULL ) {

         fn(panel, result == GTK_RESPONSE_ACCEPT);

     }

     gtk_widget_destroy( dialog );

     return result;

 }

 void gtk_gui_enable_action( const gchar *action, gboolean enable )

 {

     gtk_action_set_sensitive( gtk_action_group_get_action( global_action_group, action), enable);

 }

 static void delete_frame_buffer( guchar *pixels, gpointer buffer )

 {

     if( buffer != NULL ) {

         g_free(buffer);

     }

 }

 GdkPixbuf *gdk_pixbuf_new_from_frame_buffer( frame_buffer_t buffer )

 {

     return gdk_pixbuf_new_from_data( (unsigned char *)buffer->data, 

             GDK_COLORSPACE_RGB,

             (buffer->colour_format == COLFMT_BGRA8888),

             8,

             buffer->width,

             buffer->height,

             buffer->rowstride,

             delete_frame_buffer,

             buffer );

 }

 /**

  * Extract the keyval of the key event if no modifier keys were pressed -

  * in other words get the keyval of the key by itself. The other way around

  * would be to use the hardware keysyms directly rather than the keyvals,

  * but the mapping looks to be messier.

  */

 uint16_t gtk_get_unmodified_keyval( GdkEventKey *event )

 {

     GdkKeymap *keymap = gdk_keymap_get_default();

     guint keyval;

     gdk_keymap_translate_keyboard_state( keymap, event->hardware_keycode, 0, 0, &keyval, 

                                          NULL, NULL, NULL );

     return keyval;

 }