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 "heap.h"
  30 #include "wine/exception.h"
  31 #include "ddraw.h"
  32 #include "d3d.h"
  33 #include "debugtools.h"
  34 #include "options.h"
  35
  36 #include "dga_private.h"
  37
  38 #define RESTORE__SIGNALS
  39
  40 DEFAULT_DEBUG_CHANNEL(ddraw);
  41
  42 #ifdef HAVE_LIBXXF86VM
  43 XF86VidModeModeInfo *orig_mode = NULL;
  44 #endif
  45
  46 static inline BOOL get_option( const char *name, BOOL def ) {
  47     return PROFILE_GetWineIniBool( "x11drv", name, def );
  48 }
  49
  50 static BYTE
  51 DDRAW_DGA_Available(void)
  52 {
  53     int fd, evbase, evret, majver, minver;
  54     static BYTE return_value = 0xFF;
  55
  56     /* This prevents from probing X times for DGA */
  57     if (return_value != 0xFF)
  58         return return_value;
  59
  60     if (!get_option( "UseDGA", 1 )) {
  61         TRACE("UseDGA disabled.\n");
  62         return_value = 0;
  63         return 0;
  64     }
  65
  66     /* First, query the extenstion and its version */
  67     if (!TSXF86DGAQueryExtension(display,&evbase,&evret)) {
  68         TRACE("DGA extension not detected.\n");
  69         return_value = 0;
  70         return 0;
  71     }
  72
  73     if (!TSXF86DGAQueryVersion(display,&majver,&minver)) {
  74         TRACE("DGA version not detected.\n");
  75         return_value = 0;
  76         return 0;
  77     }
  78
  79     /* You don't have to be root to use DGA extensions. Simply having access
  80      * to /dev/mem will do the trick
  81      * This can be achieved by adding the user to the "kmem" group on
  82      * Debian 2.x systems, don't know about
  83      * others. --stephenc
  84      */
  85     if ((fd = open("/dev/mem", O_RDWR)) != -1)
  86         close(fd);
  87
  88     if (fd != -1)
  89         return_value = 1;
  90     else {
  91         TRACE("You have no access to /dev/mem\n");
  92         return_value = 0;
  93     }
  94     return return_value;
  95 }
  96
  97 HRESULT
  98 DGA_Create( LPDIRECTDRAW *lplpDD ) {
  99     IDirectDrawImpl*            ddraw;
 100     dga_dd_private*     dgpriv;
 101     int  memsize,banksize,major,minor,flags;
 102     char *addr;
 103     int  depth;
 104     int  dga_version;
 105     int  width, height;
 106
 107     /* Get DGA availability / version */
 108     dga_version = DDRAW_DGA_Available();
 109     if (dga_version == 0)
 110         return DDERR_GENERIC;
 111
 112     /* If we were just testing ... return OK */
 113     if (lplpDD == NULL)
 114         return DD_OK;
 115
 116     ddraw = (IDirectDrawImpl*)HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(IDirectDrawImpl));
 117     *lplpDD = (LPDIRECTDRAW)ddraw;
 118     ddraw->ref = 1;
 119     ICOM_VTBL(ddraw) = &dga_ddvt;
 120     ddraw->d = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(*(ddraw->d)));
 121     ddraw->d->ref = 1;
 122     ddraw->d->private = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(dga_dd_private));
 123     dgpriv = (dga_dd_private*)ddraw->d->private;
 124
 125     TSXF86DGAQueryVersion(display,&major,&minor);
 126     TRACE("XF86DGA is version %d.%d\n",major,minor);
 127
 128     TSXF86DGAQueryDirectVideo(display,DefaultScreen(display),&flags);
 129     if (!(flags & XF86DGADirectPresent)) {
 130       /* On some boards, DGA extension is present but does not support DirectVideo */
 131       MESSAGE("direct video is NOT PRESENT.\n");
 132       return DDERR_GENERIC;
 133     }
 134     TSXF86DGAGetVideo(display,DefaultScreen(display),&addr,&width,&banksize,&memsize);
 135     dgpriv->fb_width = width;
 136     TSXF86DGAGetViewPortSize(display,DefaultScreen(display),&width,&height);
 137     TSXF86DGASetViewPort(display,DefaultScreen(display),0,0);
 138     dgpriv->fb_height = height;
 139     TRACE("video framebuffer: begin %p, width %d,banksize %d,memsize %d\n",
 140           addr,width,banksize,memsize
 141           );
 142     TRACE("viewport height: %d\n",height);
 143     /* Get the screen dimensions as seen by Wine.
 144      * In that case, it may be better to ignore the -desktop mode and
 145      * return the real screen size => print a warning
 146      */
 147     ddraw->d->height = GetSystemMetrics(SM_CYSCREEN);
 148     ddraw->d->width = GetSystemMetrics(SM_CXSCREEN);
 149     if ((ddraw->d->height != height) || (ddraw->d->width  != width))
 150       WARN("You seem to be running in -desktop mode. This may prove dangerous in DGA mode...\n");
 151     dgpriv->fb_addr             = addr;
 152     dgpriv->fb_memsize  = memsize;
 153     dgpriv->vpmask              = 0;
 154
 155     /* Register frame buffer with the kernel, it is a potential DIB section */
 156     VirtualAlloc(dgpriv->fb_addr, dgpriv->fb_memsize, MEM_RESERVE|MEM_SYSTEM, PAGE_READWRITE);
 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, (IDirectDraw*) ddraw);
 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); }