lxdream.org :: lxdream/src/drivers/video

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     1 /**

     2  * $Id: video_gtk.c,v 1.18 2007-10-31 12:05:23 nkeynes Exp $

     3  *

     4  * The PC side of the video support (responsible for actually displaying /

     5  * rendering frames)

     6  *

     7  * Copyright (c) 2005 Nathan Keynes.

     8  *

     9  * This program is free software; you can redistribute it and/or modify

    10  * it under the terms of the GNU General Public License as published by

    11  * the Free Software Foundation; either version 2 of the License, or

    12  * (at your option) any later version.

    13  *

    14  * This program is distributed in the hope that it will be useful,

    15  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    17  * GNU General Public License for more details.

    18  */

    20 #include <gnome.h>

    21 #include <gdk/gdkx.h>

    22 #include <stdint.h>

    23 #include "dream.h"

    24 #include "display.h"

    25 #include "drivers/video_x11.h"

    26 #include "drivers/gl_common.h"

    27 #include "gui/gtkui.h"

    29 static GtkWidget *video_win = NULL;

    30 int video_width = 640;

    31 int video_height = 480;

    33 gboolean video_gtk_init();

    34 void video_gtk_shutdown();

    35 uint16_t video_gtk_resolve_keysym( const gchar *keysym );

    37 struct display_driver display_gtk_driver = { "gtk", video_gtk_init, video_gtk_shutdown,

    38 					     video_gtk_resolve_keysym,

    39 					     NULL, NULL, NULL, NULL, NULL, NULL, NULL };

    41 /**

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

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

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

    45  * but the mapping looks to be messier.

    46  */

    47 uint16_t video_gtk_unmodified_keyval( GdkEventKey *event )

    48 {

    49     GdkKeymap *keymap = gdk_keymap_get_default();

    50     guint keyval;

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

    53 					 NULL, NULL, NULL );

    54     return keyval;

    55 }

    57 gboolean video_gtk_keydown_callback(GtkWidget       *widget,

    58 				     GdkEventKey     *event,

    59 				     gpointer         user_data)

    60 {

    61     input_event_keydown( video_gtk_unmodified_keyval(event) );

    62     return TRUE;

    63 }

    65 gboolean video_gtk_keyup_callback(GtkWidget       *widget,

    66 				  GdkEventKey     *event,

    67 				  gpointer         user_data)

    68 {

    69     input_event_keyup( video_gtk_unmodified_keyval(event) );

    70     return TRUE;

    71 }

    73 uint16_t video_gtk_resolve_keysym( const gchar *keysym )

    74 {

    75     int val = gdk_keyval_from_name( keysym );

    76     if( val == GDK_VoidSymbol )

    77 	return 0;

    78     return (uint16_t)val;

    79 }

    81 gboolean video_gtk_expose_callback(GtkWidget *widget, GdkEventExpose *event, gpointer data )

    82 {

    83     gl_fbo_detach();

    84     gl_redisplay_last();

    85     return TRUE;

    86 }

    88 gboolean video_gtk_resize_callback(GtkWidget *widget, GdkEventConfigure *event, gpointer data )

    89 {

    90     video_width = event->width;

    91     video_height = event->height;

    92     gl_fbo_detach();

    93     gl_redisplay_last();

    94     return TRUE;

    95 }

    97 gboolean video_gtk_init()

    98 {

    99     video_win = gtk_gui_get_renderarea();

   101     g_signal_connect( video_win, "key_press_event",

   102 		      G_CALLBACK(video_gtk_keydown_callback), NULL );

   103     g_signal_connect( video_win, "key_release_event",

   104 		      G_CALLBACK(video_gtk_keyup_callback), NULL );

   105     g_signal_connect( video_win, "expose_event",

   106 		      G_CALLBACK(video_gtk_expose_callback), NULL );

   107     g_signal_connect( video_win, "configure_event",

   108 		      G_CALLBACK(video_gtk_resize_callback), NULL );

   109     gtk_widget_add_events( video_win,

   110 			   GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK |

   111 			   GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK );

   112     gtk_widget_set_double_buffered( video_win, FALSE );

   113     video_width = video_win->allocation.width;

   114     video_height = video_win->allocation.height;

   115     return video_glx_init( gdk_x11_display_get_xdisplay( gtk_widget_get_display(GTK_WIDGET(video_win))),

   116 			   gdk_x11_screen_get_xscreen( gtk_widget_get_screen(GTK_WIDGET(video_win))),

   117 			   GDK_WINDOW_XWINDOW( GTK_WIDGET(video_win)->window ),

   118 			   video_width, video_height, &display_gtk_driver );

   119 }

   121 void video_gtk_shutdown()

   122 {

   123     video_glx_shutdown();

   124     gtk_widget_destroy( GTK_WIDGET(video_win) );

   126 }