/**

  * $Id$

  *

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

  * rendering frames)

  *

  * 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 <gdk/gdkkeysyms.h>

 #include <stdint.h>

 #include <stdlib.h>

 #include "lxdream.h"

 #include "display.h"

 #include "dckeysyms.h"

 #include "drivers/video_gl.h"

 #include "drivers/joy_linux.h"

 #include "pvr2/pvr2.h"

 #include "gtkui/gtkui.h"

 #ifdef HAVE_GTK_X11

 #include <gdk/gdkx.h>

 #include "drivers/video_glx.h"

 /************* X11-specificness **********/

 guint gdk_keycode_to_modifier( GdkDisplay *display, guint keycode )

 {

     int i;

     int result = 0;

     Display *xdisplay = GDK_DISPLAY_XDISPLAY (display);

     XModifierKeymap *keymap = XGetModifierMapping( xdisplay );

     for( i=0; i<8*keymap->max_keypermod; i++ ) {

         if( keymap->modifiermap[i] == keycode ) {

             result = 1 << (i/keymap->max_keypermod);

             break;

         }

     }

     XFreeModifiermap(keymap);

     return result;

 }

 #if !(GTK_CHECK_VERSION(2,8,0))

 /* gdk_display_warp_pointer was added in GTK 2.8. If we're using an earlier

  * version, include the code here. (Can't just set the dependency on 2.8 as

  * it still hasn't been included in fink yet...) Original copyright statement

  * below.

  */

 /* GDK - The GIMP Drawing Kit

  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald

  *

  * This library is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public

  * License as published by the Free Software Foundation; either

  * version 2 of the License, or (at your option) any later version.

  *

  * This library 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

  * Lesser General Public License for more details.

  *

  * You should have received a copy of the GNU Lesser General Public

  * License along with this library; if not, write to the

  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

  * Boston, MA 02111-1307, USA.

  */

 /*

  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS

  * file for a list of people on the GTK+ Team.  See the ChangeLog

  * files for a list of changes.  These files are distributed with

  * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 

  */

 void gdk_display_warp_pointer (GdkDisplay *display,

                                GdkScreen  *screen,

                                gint        x,

                                gint        y)

 {

     Display *xdisplay;

     Window dest;

     xdisplay = GDK_DISPLAY_XDISPLAY (display);

     dest = GDK_WINDOW_XWINDOW (gdk_screen_get_root_window (screen));

     XWarpPointer (xdisplay, None, dest, 0, 0, 0, 0, x, y);  

 }

 #endif

 #endif

 #ifdef HAVE_GTK_OSX

 #include "drivers/video_nsgl.h"

 // Include this prototype as some systems don't have gdkquartz.h installed

 NSView  *gdk_quartz_window_get_nsview( GdkWindow *window);

 guint gdk_keycode_to_modifier( GdkDisplay *display, guint keycode )

 {

     return 0;

 }

 #endif

 GtkWidget *gtk_video_drawable = NULL;

 int video_width = 640;

 int video_height = 480;

 gboolean video_gtk_init();

 void video_gtk_shutdown();

 void video_gtk_display_blank( uint32_t colour );

 uint16_t video_gtk_resolve_keysym( const gchar *keysym );

 uint16_t video_gtk_keycode_to_dckeysym(uint16_t keycode);

 struct display_driver display_gtk_driver = { 

         "gtk",

         N_("GTK-based OpenGL driver"),

         video_gtk_init, 

         video_gtk_shutdown,

         video_gtk_resolve_keysym,

         video_gtk_keycode_to_dckeysym,

         NULL,

         NULL, NULL, NULL, NULL, NULL, 

         video_gtk_display_blank, NULL };

 uint16_t video_gtk_resolve_keysym( const gchar *keysym )

 {

     int val = gdk_keyval_from_name( keysym );

     if( val == GDK_VoidSymbol )

         return 0;

     return (uint16_t)val;

 }

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

 {

     pvr2_redraw_display();

     return TRUE;

 }

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

 {

     video_width = event->width;

     video_height = event->height;

     pvr2_redraw_display();

     return TRUE;

 }

 uint16_t video_gtk_keycode_to_dckeysym(uint16_t keycode)

 {

     if( keycode >= 'a' && keycode <= 'z' ) {

         return (keycode - 'a') + DCKB_a;

     } else if( keycode >= '1' && keycode <= '9' ) {

         return (keycode - '1') + DCKB_1;

     }

     switch(keycode) {

     case GDK_0:         return DCKB_0;

     case GDK_Return:    return DCKB_Return;

     case GDK_Escape:    return DCKB_Escape;

     case GDK_BackSpace: return DCKB_BackSpace;

     case GDK_Tab:       return DCKB_Tab;

     case GDK_space:     return DCKB_space;

     case GDK_minus:     return DCKB_minus;

     case GDK_equal:     return DCKB_equal;

     case GDK_bracketleft: return DCKB_bracketleft;

     case GDK_bracketright: return DCKB_bracketright;

     case GDK_semicolon: return DCKB_semicolon;

     case GDK_apostrophe:return DCKB_apostrophe;

     case GDK_grave : return DCKB_grave;

     case GDK_comma:     return DCKB_comma;

     case GDK_period:    return DCKB_period;

     case GDK_slash:     return DCKB_slash; 

     case GDK_Caps_Lock: return DCKB_Caps_Lock;

     case GDK_F1:        return DCKB_F1;

     case GDK_F2:        return DCKB_F2;

     case GDK_F3:        return DCKB_F3;

     case GDK_F4:        return DCKB_F4;

     case GDK_F5:        return DCKB_F5;

     case GDK_F6:        return DCKB_F6;

     case GDK_F7:        return DCKB_F7;

     case GDK_F8:        return DCKB_F8;

     case GDK_F9:        return DCKB_F9;

     case GDK_F10:       return DCKB_F10;

     case GDK_F11:       return DCKB_F11;

     case GDK_F12:       return DCKB_F12;

     case GDK_Scroll_Lock: return DCKB_Scroll_Lock;

     case GDK_Pause:     return DCKB_Pause;

     case GDK_Insert:    return DCKB_Insert;

     case GDK_Home:      return DCKB_Home;

     case GDK_Page_Up:   return DCKB_Page_Up;

     case GDK_Delete:    return DCKB_Delete;

     case GDK_End:       return DCKB_End;

     case GDK_Page_Down: return DCKB_Page_Down;

     case GDK_Right:     return DCKB_Right;

     case GDK_Left:      return DCKB_Left;

     case GDK_Down:      return DCKB_Down;

     case GDK_Up:        return DCKB_Up;

     case GDK_Num_Lock:  return DCKB_Num_Lock;

     case GDK_KP_Divide: return DCKB_KP_Divide;

     case GDK_KP_Multiply: return DCKB_KP_Multiply;

     case GDK_KP_Subtract: return DCKB_KP_Subtract;

     case GDK_KP_Add:    return DCKB_KP_Add;

     case GDK_KP_Enter:  return DCKB_KP_Enter;

     case GDK_KP_End:    return DCKB_KP_End;

     case GDK_KP_Down:   return DCKB_KP_Down;

     case GDK_KP_Page_Down: return DCKB_KP_Page_Down;

     case GDK_KP_Left:   return DCKB_KP_Left;

     case GDK_KP_Begin:  return DCKB_KP_Begin;

     case GDK_KP_Right:  return DCKB_KP_Right;

     case GDK_KP_Home:   return DCKB_KP_Home;

     case GDK_KP_Up:     return DCKB_KP_Up;

     case GDK_KP_Page_Up:return DCKB_KP_Page_Up;

     case GDK_KP_Insert: return DCKB_KP_Insert;

     case GDK_KP_Delete: return DCKB_KP_Delete;

     case GDK_backslash: return DCKB_backslash;

     case GDK_Control_L: return DCKB_Control_L;

     case GDK_Shift_L:   return DCKB_Shift_L;

     case GDK_Alt_L:     return DCKB_Alt_L;

     case GDK_Meta_L:    return DCKB_Meta_L;

     case GDK_Control_R: return DCKB_Control_R;

     case GDK_Shift_R:   return DCKB_Shift_R;

     case GDK_Alt_R:     return DCKB_Alt_R;

     case GDK_Meta_R:    return DCKB_Meta_R;

     }

     return DCKB_NONE;

 }

 GtkWidget *video_gtk_create_drawable()

 {

     GtkWidget *drawable = gtk_drawing_area_new();

     GTK_WIDGET_SET_FLAGS(drawable, GTK_CAN_FOCUS|GTK_CAN_DEFAULT);

     g_signal_connect( drawable, "expose_event",

                       G_CALLBACK(video_gtk_expose_callback), NULL );

     g_signal_connect( drawable, "configure_event",

                       G_CALLBACK(video_gtk_resize_callback), NULL );

 #ifdef HAVE_GLX

     Display *display = gdk_x11_display_get_xdisplay( gtk_widget_get_display(drawable));

     Screen *screen = gdk_x11_screen_get_xscreen( gtk_widget_get_screen(drawable));

     int screen_no = XScreenNumberOfScreen(screen);

     if( !video_glx_init(display, screen_no) ) {

         ERROR( "Unable to initialize GLX, aborting" );

         exit(3);

     }

     XVisualInfo *visual = video_glx_get_visual();

     if( visual != NULL ) {

         GdkVisual *gdkvis = gdk_x11_screen_lookup_visual( gtk_widget_get_screen(drawable), visual->visualid );

         GdkColormap *colormap = gdk_colormap_new( gdkvis, FALSE );

         gtk_widget_set_colormap( drawable, colormap );

     }

 #endif

     gtk_video_drawable = drawable;

     return drawable;

 }

 gboolean video_gtk_init()

 {

     if( gtk_video_drawable == NULL ) {

         return FALSE;

     }

     video_width = gtk_video_drawable->allocation.width;

     video_height = gtk_video_drawable->allocation.height;

 #ifdef HAVE_OSMESA

     video_gdk_init_driver( &display_gtk_driver );

 #else

 #ifdef HAVE_GLX

     Display *display = gdk_x11_display_get_xdisplay( gtk_widget_get_display(GTK_WIDGET(gtk_video_drawable)));

     Window window = GDK_WINDOW_XWINDOW( GTK_WIDGET(gtk_video_drawable)->window );

     if( ! video_glx_init_context( display, window ) ||

             ! video_glx_init_driver( &display_gtk_driver ) ) {

         return FALSE;

     }

 #else

 #ifdef HAVE_NSGL

     NSView *view = gdk_quartz_window_get_nsview(gtk_video_drawable->window);

     if( ! video_nsgl_init_driver( view, &display_gtk_driver ) ) {

         return FALSE;

     }

 #endif

 #endif

 #endif

     pvr2_setup_gl_context();

 #ifdef HAVE_LINUX_JOYSTICK

     linux_joystick_init();

 #endif

     return TRUE;

 }

 void video_gtk_display_blank( uint32_t colour )

 {

     GdkGC *gc = gdk_gc_new(gtk_video_drawable->window);

     GdkColor color = {0, ((colour>>16)&0xFF)*257, ((colour>>8)&0xFF)*257, ((colour)&0xFF)*257 };

     GdkColormap *cmap = gdk_colormap_get_system();

     gdk_colormap_alloc_color( cmap, &color, TRUE, TRUE );

     gdk_gc_set_foreground( gc, &color );

     gdk_gc_set_background( gc, &color );

     gdk_draw_rectangle( gtk_video_drawable->window, gc, TRUE, 0, 0, video_width, video_height );

     gdk_gc_destroy(gc);

     gdk_colormap_free_colors( cmap, &color, 1 );

 }

 void video_gtk_shutdown()

 {

     if( gtk_video_drawable != NULL ) {

 #ifdef HAVE_OSMESA

         video_gdk_shutdown();

 #else

 #ifdef HAVE_GLX

         video_glx_shutdown();

 #else

 #ifdef HAVE_NSGL

         video_nsgl_shutdown();

 #endif

 #endif

 #endif

     }

 #ifdef HAVE_LINUX_JOYSTICK

     linux_joystick_shutdown();

 #endif

 }