dlls/ddraw/dga.c

   1 /*              DirectDraw using DGA
   2  *
   3  * Copyright 1997-2000 Marcus Meissner
   4  * Copyright 1998-2000 Lionel Ulmer (most of Direct3D stuff)
   5  */
   6 /* XF86DGA:
   7  * When DirectVideo mode is enabled you can no longer use 'normal' X
   8  * applications nor can you switch to a virtual console. Also, enabling
   9  * only works, if you have switched to the screen where the application
  10  * is running.
  11  * Some ways to debug this stuff are:
  12  * - A terminal connected to the serial port. Can be bought used for cheap.
  13  *   (This is the method I am using.)
  14  * - Another machine connected over some kind of network.
  15  */
  16
  17 #include "config.h"
  18 #include "winerror.h"
  19
  20 #include <unistd.h>
  21 #include <assert.h>
  22 #ifdef HAVE_SYS_SIGNAL_H
  23 # include <sys/signal.h>
  24 #endif
  25 #include <fcntl.h>
  26 #include <string.h>
  27 #include <stdio.h>
  28
  29 #include "gdi.h"
  30 #include "heap.h"
  31 #include "dc.h"
  32 #include "win.h"
  33 #include "wine/exception.h"
  34 #include "ddraw.h"
  35 #include "d3d.h"
  36 #include "debugtools.h"
  37 #include "spy.h"
  38 #include "message.h"
  39 #include "options.h"
  40 #include "monitor.h"
  41
  42 #include "dga_private.h"
  43
  44 #define RESTORE__SIGNALS
  45
  46 DEFAULT_DEBUG_CHANNEL(ddraw);
  47
  48 #ifdef HAVE_LIBXXF86VM
  49 XF86VidModeModeInfo *orig_mode = NULL;
  50 #endif
  51
  52 static inline BOOL get_option( const char *name, BOOL def ) {
  53     return PROFILE_GetWineIniBool( "x11drv", name, def );
  54 }
  55
  56 static BYTE
  57 DDRAW_DGA_Available(void)
  58 {
  59     int fd, evbase, evret, majver, minver;
  60     static BYTE return_value = 0xFF;
  61
  62     /* This prevents from probing X times for DGA */
  63     if (return_value != 0xFF)
  64         return return_value;
  65
  66     if (!get_option( "UseDGA", 1 )) {
  67         TRACE("UseDGA disabled.\n");
  68         return_value = 0;
  69         return 0;
  70     }
  71
  72     /* First, query the extenstion and its version */
  73     if (!TSXF86DGAQueryExtension(display,&evbase,&evret)) {
  74         TRACE("DGA extension not detected.\n");
  75         return_value = 0;
  76         return 0;
  77     }
  78
  79     if (!TSXF86DGAQueryVersion(display,&majver,&minver)) {
  80         TRACE("DGA version not detected.\n");
  81         return_value = 0;
  82         return 0;
  83     }
  84
  85     /* You don't have to be root to use DGA extensions. Simply having access
  86      * to /dev/mem will do the trick
  87      * This can be achieved by adding the user to the "kmem" group on
  88      * Debian 2.x systems, don't know about
  89      * others. --stephenc
  90      */
  91     if ((fd = open("/dev/mem", O_RDWR)) != -1)
  92         close(fd);
  93
  94     if (fd != -1)
  95         return_value = 1;
  96     else {
  97         TRACE("You have no access to /dev/mem\n");
  98         return_value = 0;
  99     }
 100     return return_value;
 101 }
 102
 103 HRESULT
 104 DGA_Create( LPDIRECTDRAW *lplpDD ) {
 105     IDirectDrawImpl*            ddraw;
 106     dga_dd_private*     dgpriv;
 107     int  memsize,banksize,major,minor,flags;
 108     char *addr;
 109     int  depth;
 110     int  dga_version;
 111     int  width, height;
 112
 113     /* Get DGA availability / version */
 114     dga_version = DDRAW_DGA_Available();
 115     if (dga_version == 0)
 116         return DDERR_GENERIC;
 117
 118     /* If we were just testing ... return OK */
 119     if (lplpDD == NULL)
 120         return DD_OK;
 121
 122     ddraw = (IDirectDrawImpl*)HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(IDirectDrawImpl));
 123     *lplpDD = (LPDIRECTDRAW)ddraw;
 124     ddraw->ref = 1;
 125     ICOM_VTBL(ddraw) = &dga_ddvt;
 126
 127     ddraw->private = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(dga_dd_private));
 128
 129     dgpriv = (dga_dd_private*)ddraw->private;
 130
 131     TSXF86DGAQueryVersion(display,&major,&minor);
 132     TRACE("XF86DGA is version %d.%d\n",major,minor);
 133
 134     TSXF86DGAQueryDirectVideo(display,DefaultScreen(display),&flags);
 135     if (!(flags & XF86DGADirectPresent))
 136       MESSAGE("direct video is NOT PRESENT.\n");
 137     TSXF86DGAGetVideo(display,DefaultScreen(display),&addr,&width,&banksize,&memsize);
 138     dgpriv->fb_width = width;
 139     TSXF86DGAGetViewPortSize(display,DefaultScreen(display),&width,&height);
 140     TSXF86DGASetViewPort(display,DefaultScreen(display),0,0);
 141     dgpriv->fb_height = height;
 142     TRACE("video framebuffer: begin %p, width %d,banksize %d,memsize %d\n",
 143           addr,width,banksize,memsize
 144           );
 145     TRACE("viewport height: %d\n",height);
 146     /* Get the screen dimensions as seen by Wine.
 147      * In that case, it may be better to ignore the -desktop mode and
 148      * return the real screen size => print a warning
 149      */
 150     ddraw->d.height = MONITOR_GetHeight(&MONITOR_PrimaryMonitor);
 151     ddraw->d.width = MONITOR_GetWidth(&MONITOR_PrimaryMonitor);
 152     if ((ddraw->d.height != height) || (ddraw->d.width  != width))
 153       WARN("You seem to be running in -desktop mode. This may prove dangerous in DGA mode...\n");
 154     dgpriv->fb_addr             = addr;
 155     dgpriv->fb_memsize  = memsize;
 156     dgpriv->vpmask              = 0;
 157
 158     /* The cast is because DGA2's install colormap does not return a value whereas
 159        DGA1 version does */
 160     dgpriv->InstallColormap = (void (*)(Display *, int, Colormap)) TSXF86DGAInstallColormap;
 161
 162     /* just assume the default depth is the DGA depth too */
 163     depth = DefaultDepthOfScreen(X11DRV_GetXScreen());
 164
 165     _common_depth_to_pixelformat(depth, &(ddraw->d.directdraw_pixelformat), &(ddraw->d.screen_pixelformat), NULL);
 166
 167 #ifdef RESTORE_SIGNALS
 168     SIGNAL_Init();
 169 #endif
 170
 171     return DD_OK;
 172 }
 173
 174 /* Where do these GUIDs come from?  mkuuid.
 175  * They exist solely to distinguish between the targets Wine support,
 176  * and should be different than any other GUIDs in existence.
 177  */
 178 static GUID DGA_DirectDraw_GUID = { /* e2dcb020-dc60-11d1-8407-9714f5d50802 */
 179     0xe2dcb020,
 180     0xdc60,
 181     0x11d1,
 182     {0x84, 0x07, 0x97, 0x14, 0xf5, 0xd5, 0x08, 0x02}
 183 };
 184
 185 ddraw_driver dga_driver = {
 186     &DGA_DirectDraw_GUID,
 187     "display",
 188     "WINE XF86DGA DirectDraw Driver",
 189     100,
 190     DGA_Create
 191 };
 192
 193 DECL_GLOBAL_CONSTRUCTOR(DGA_register) { ddraw_register_driver(&dga_driver); }