Drop DGA extension support

It appears to be broken forever. Since nobody complained, it looks like
nobody actually need it. Drop it.

See discussion at QubesOS#233

Author: marmarek

xf86-video-dummy/configure.ac

@@ -44,7 +44,6 @@ LT_INIT
 AH_TOP([#include "xorg-server.h"])
 
 # Define a configure option for an alternate module directory
-AC_ARG_ENABLE(dga,           AS_HELP_STRING([--disable-dga], [Build DGA extension (default: yes)]), [DGA=$enableval], [DGA=yes])
 AC_ARG_WITH(xorg-module-dir, [  --with-xorg-module-dir=DIR ],
                              [ moduledir="$withval" ],
                              [ moduledir="$libdir/xorg/modules" ])
@@ -56,13 +55,6 @@ XORG_DRIVER_CHECK_EXT(RANDR, randrproto)
 XORG_DRIVER_CHECK_EXT(RENDER, renderproto)
 XORG_DRIVER_CHECK_EXT(XV, videoproto)
 
-if test "x$DGA" = xyes; then
-	XORG_DRIVER_CHECK_EXT(XFreeXDGA, xf86dgaproto)
-	AC_DEFINE(USE_DGA, 1, [Support DGA extension])
-fi
-AC_SUBST([DGA])
-AM_CONDITIONAL([DGA], [test "x$DGA" = xyes])
-
 # Obtain compiler/linker options for the driver dependencies
 PKG_CHECK_MODULES(XORG, [xorg-server >= 1.0.99.901] xproto fontsproto $REQUIRED_MODULES)
 

xf86-video-dummy/src/Makefile.am

@@ -39,8 +39,3 @@ dummyqbs_drv_la_SOURCES = \
          dummy_driver.c \
          dummy.h \
 	 ../../gui-agent/list.c
-
-if DGA
-dummyqbs_drv_la_SOURCES +=	\
-         dummy_dga.c
-endif

xf86-video-dummy/src/dummy.h

@@ -34,9 +34,6 @@ extern Bool DUMMYCursorInit(ScreenPtr pScrn);
 extern void DUMMYShowCursor(ScrnInfoPtr pScrn);
 extern void DUMMYHideCursor(ScrnInfoPtr pScrn);
 
-/* in dummy_dga.c */
-Bool DUMMYDGAInit(ScreenPtr pScreen);
-
 /* in dummy_video.c */
 extern void DUMMYInitVideo(ScreenPtr pScreen);
 
@@ -53,10 +50,6 @@ struct gbm_bo;
 
 typedef struct dummyRec 
 {
-    DGAModePtr		DGAModes;
-    int			numDGAModes;
-    Bool		DGAactive;
-    int			DGAViewportStatus;
     /* options */
     OptionInfoPtr Options;
     Bool swCursor;

xf86-video-dummy/src/dummy_dga.c

@@ -48,10 +48,6 @@
 #include <X11/Xproto.h>
 #include "scrnintstr.h"
 #include "servermd.h"
-#ifdef USE_DGA
-#define _XF86DGA_SERVER_
-#include <X11/extensions/xf86dgaproto.h>
-#endif
 
 /* glamor support */
 #define GLAMOR_FOR_XORG
@@ -1126,10 +1122,6 @@ DUMMYScreenInit(SCREEN_INIT_ARGS_DECL)
     dPtr->CreateScreenResources = pScreen->CreateScreenResources;
     pScreen->CreateScreenResources = qubes_create_screen_resources;
 
-#ifdef USE_DGA
-    DUMMYDGAInit(pScreen);
-#endif
-
     /* initialize XRANDR */
     xf86CrtcConfigInit(pScrn, &DUMMYCrtcConfigFuncs);
     /* FIXME */