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

tree revision 573:28ff000e66bb lxdream-mmu

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     1 /**

     2  * $Id$

     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 <gdk/gdkx.h>

    21 #include <gdk/gdkkeysyms.h>

    22 #include <stdint.h>

    23 #include "dream.h"

    24 #include "display.h"

    25 #include "drivers/video_glx.h"

    26 #include "drivers/gl_common.h"

    27 #include "pvr2/pvr2.h"

    28 #include "gtkui/gtkui.h"

    30 static GtkWidget *video_win = NULL;

    31 int video_width = 640;

    32 int video_height = 480;

    34 gboolean video_gtk_init();

    35 void video_gtk_shutdown();

    36 gboolean video_gtk_display_blank( uint32_t colour );

    37 uint16_t video_gtk_resolve_keysym( const gchar *keysym );

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

    40 					     video_gtk_resolve_keysym,

    41 					     NULL, NULL, NULL, NULL, NULL,

    42 					     video_gtk_display_blank, NULL };

    44 /**

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

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

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

    48  * but the mapping looks to be messier.

    49  */

    50 uint16_t video_gtk_unmodified_keyval( GdkEventKey *event )

    51 {

    52     GdkKeymap *keymap = gdk_keymap_get_default();

    53     guint keyval;

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

    56 					 NULL, NULL, NULL );

    57     return keyval;

    58 }

    60 gboolean video_gtk_keydown_callback(GtkWidget       *widget,

    61 				     GdkEventKey     *event,

    62 				     gpointer         user_data)

    63 {

    64     input_event_keydown( video_gtk_unmodified_keyval(event) );

    65     return TRUE;

    66 }

    68 gboolean video_gtk_keyup_callback(GtkWidget       *widget,

    69 				  GdkEventKey     *event,

    70 				  gpointer         user_data)

    71 {

    72     input_event_keyup( video_gtk_unmodified_keyval(event) );

    73     return TRUE;

    74 }

    76 uint16_t video_gtk_resolve_keysym( const gchar *keysym )

    77 {

    78     int val = gdk_keyval_from_name( keysym );

    79     if( val == GDK_VoidSymbol )

    80 	return 0;

    81     return (uint16_t)val;

    82 }

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

    85 {

    86     render_buffer_t buffer = pvr2_get_front_buffer();

    87     if( buffer == NULL ) {

    88 	display_gtk_driver.display_blank(pvr2_get_border_colour());

    89     } else {

    90 	display_gtk_driver.display_render_buffer(buffer);

    91     }

    92     return TRUE;

    93 }

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

    96 {

    97     video_width = event->width;

    98     video_height = event->height;

    99     video_gtk_expose_callback(widget, NULL, data);

   100     return TRUE;

   101 }

   103 gboolean video_gtk_init()

   104 {

   106     video_win = gtk_gui_get_renderarea();

   107     if( video_win == NULL ) {

   108 	return FALSE;

   109     }

   111     g_signal_connect( video_win, "key_press_event",

   112 		      G_CALLBACK(video_gtk_keydown_callback), NULL );

   113     g_signal_connect( video_win, "key_release_event",

   114 		      G_CALLBACK(video_gtk_keyup_callback), NULL );

   115     g_signal_connect( video_win, "expose_event",

   116 		      G_CALLBACK(video_gtk_expose_callback), NULL );

   117     g_signal_connect( video_win, "configure_event",

   118 		      G_CALLBACK(video_gtk_resize_callback), NULL );

   119     gtk_widget_add_events( video_win,

   120 			   GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK |

   121 			   GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK );

   122     gtk_widget_set_double_buffered( video_win, FALSE );

   123     video_width = video_win->allocation.width;

   124     video_height = video_win->allocation.height;

   125     Display *display = gdk_x11_display_get_xdisplay( gtk_widget_get_display(GTK_WIDGET(video_win)));

   126     Window window = GDK_WINDOW_XWINDOW( GTK_WIDGET(video_win)->window );

   127     if( ! video_glx_init_context( display, window ) ||

   128         ! video_glx_init_driver( &display_gtk_driver ) ) {

   129         return FALSE;

   130     }

   131     return TRUE;

   132 }

   134 gboolean video_gtk_display_blank( uint32_t colour )

   135 {

   136     GdkGC *gc = gdk_gc_new(video_win->window);

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

   138     GdkColormap *cmap = gdk_colormap_get_system();

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

   140     gdk_gc_set_foreground( gc, &color );

   141     gdk_gc_set_background( gc, &color );

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

   143     gdk_gc_destroy(gc);

   144     gdk_colormap_free_colors( cmap, &color, 1 );

   145 }

   147 void video_gtk_shutdown()

   148 {

   149     if( video_win != NULL ) {

   150 	video_glx_shutdown();

   151     }

   153 }