Re: [PATCH v3 x11spice 1/5] Add the upstream xf86-video-dummy as of November 25, 2018.

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> 
> This gives x11spice access to a modern virtual/offscreen
> frame buffer driver for the Xorg X server.  We will then
> make slight revisions to make it more suitable for use with Spice.
> 
> The overall result should be a more functional stack,
> as compared to the existing xf86-video-qxl driver, as we gain
> a wide range of Mesa features for free.  It also simplifies
> the overall process.
> 
> This is from https://gitlab.freedesktop.org/xorg/driver/xf86-video-dummy
> as of 850c0516.
> 
> Signed-off-by: Jeremy White <jwhite@xxxxxxxxxxxxxxx>

Acked-by: Frediano Ziglio <fziglio@xxxxxxxxxx>


> ---
> v2: Provide a specific URL for reference to the upstream xorg driver.
> v3: Unchanged
> ---
>  spice-video-dummy/COPYING            |   2 +
>  spice-video-dummy/Makefile.am        |  31 ++
>  spice-video-dummy/README.md          |  18 +
>  spice-video-dummy/autogen.sh         |  17 +
>  spice-video-dummy/configure.ac       |  72 ++++
>  spice-video-dummy/src/Makefile.am    |  39 ++
>  spice-video-dummy/src/compat-api.h   | 101 +++++
>  spice-video-dummy/src/dummy.h        |  59 +++
>  spice-video-dummy/src/dummy_cursor.c | 102 +++++
>  spice-video-dummy/src/dummy_driver.c | 740
>  +++++++++++++++++++++++++++++++++++
>  10 files changed, 1181 insertions(+)
>  create mode 100644 spice-video-dummy/COPYING
>  create mode 100644 spice-video-dummy/Makefile.am
>  create mode 100644 spice-video-dummy/README.md
>  create mode 100755 spice-video-dummy/autogen.sh
>  create mode 100644 spice-video-dummy/configure.ac
>  create mode 100644 spice-video-dummy/src/Makefile.am
>  create mode 100644 spice-video-dummy/src/compat-api.h
>  create mode 100644 spice-video-dummy/src/dummy.h
>  create mode 100644 spice-video-dummy/src/dummy_cursor.c
>  create mode 100644 spice-video-dummy/src/dummy_driver.c
> 
> diff --git a/spice-video-dummy/COPYING b/spice-video-dummy/COPYING
> new file mode 100644
> index 0000000..3c1ef48
> --- /dev/null
> +++ b/spice-video-dummy/COPYING
> @@ -0,0 +1,2 @@
> +Copyright 2002, SuSE Linux AG, Author: Egbert Eich
> +
> diff --git a/spice-video-dummy/Makefile.am b/spice-video-dummy/Makefile.am
> new file mode 100644
> index 0000000..1a10a1c
> --- /dev/null
> +++ b/spice-video-dummy/Makefile.am
> @@ -0,0 +1,31 @@
> +#  Copyright 2005 Adam Jackson.
> +#
> +#  Permission is hereby granted, free of charge, to any person obtaining a
> +#  copy of this software and associated documentation files (the
> "Software"),
> +#  to deal in the Software without restriction, including without limitation
> +#  on the rights to use, copy, modify, merge, publish, distribute, sub
> +#  license, and/or sell copies of the Software, and to permit persons to
> whom
> +#  the Software is furnished to do so, subject to the following conditions:
> +#
> +#  The above copyright notice and this permission notice (including the next
> +#  paragraph) shall be included in all copies or substantial portions of the
> +#  Software.
> +#
> +#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
> OR
> +#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> +#  FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
> +#  ADAM JACKSON BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
> +#  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
> +#  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> SOFTWARE.
> +
> +SUBDIRS = src
> +MAINTAINERCLEANFILES = ChangeLog
> +
> +.PHONY: ChangeLog
> +
> +ChangeLog:
> +	$(CHANGELOG_CMD)
> +
> +dist-hook: ChangeLog
> +
> +EXTRA_DIST = README.md
> diff --git a/spice-video-dummy/README.md b/spice-video-dummy/README.md
> new file mode 100644
> index 0000000..2a84bc3
> --- /dev/null
> +++ b/spice-video-dummy/README.md
> @@ -0,0 +1,18 @@
> +xf86-video-dummy - virtual/offscreen frame buffer driver for the Xorg X
> server
> +------------------------------------------------------------------------------
> +
> +All questions regarding this software should be directed at the
> +Xorg mailing list:
> +
> +  https://lists.x.org/mailman/listinfo/xorg
> +
> +The master development code repository can be found at:
> +
> +  https://gitlab.freedesktop.org/xorg/driver/xf86-video-dummy
> +
> +Please submit bug reports and requests to merge patches there.
> +
> +For patch submission instructions, see:
> +
> +  https://www.x.org/wiki/Development/Documentation/SubmittingPatches
> +
> diff --git a/spice-video-dummy/autogen.sh b/spice-video-dummy/autogen.sh
> new file mode 100755
> index 0000000..9b9f7e7
> --- /dev/null
> +++ b/spice-video-dummy/autogen.sh
> @@ -0,0 +1,17 @@
> +#! /bin/sh
> +
> +srcdir=`dirname "$0"`
> +test -z "$srcdir" && srcdir=.
> +
> +ORIGDIR=`pwd`
> +cd "$srcdir"
> +
> +autoreconf -v --install || exit 1
> +cd "$ORIGDIR" || exit $?
> +
> +git config --local --get format.subjectPrefix >/dev/null 2>&1 ||
> +    git config --local format.subjectPrefix "PATCH xf86-video-dummy"
> +
> +if test -z "$NOCONFIGURE"; then
> +    exec "$srcdir"/configure "$@"
> +fi
> diff --git a/spice-video-dummy/configure.ac b/spice-video-dummy/configure.ac
> new file mode 100644
> index 0000000..2ca0327
> --- /dev/null
> +++ b/spice-video-dummy/configure.ac
> @@ -0,0 +1,72 @@
> +#  Copyright 2005 Adam Jackson.
> +#
> +#  Permission is hereby granted, free of charge, to any person obtaining a
> +#  copy of this software and associated documentation files (the
> "Software"),
> +#  to deal in the Software without restriction, including without limitation
> +#  on the rights to use, copy, modify, merge, publish, distribute, sub
> +#  license, and/or sell copies of the Software, and to permit persons to
> whom
> +#  the Software is furnished to do so, subject to the following conditions:
> +#
> +#  The above copyright notice and this permission notice (including the next
> +#  paragraph) shall be included in all copies or substantial portions of the
> +#  Software.
> +#
> +#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
> OR
> +#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> +#  FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
> +#  ADAM JACKSON BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
> +#  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
> +#  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> SOFTWARE.
> +#
> +# Process this file with autoconf to produce a configure script
> +
> +# Initialize Autoconf
> +AC_PREREQ([2.60])
> +AC_INIT([xf86-video-dummy],
> +        [0.3.8],
> +
> [https://gitlab.freedesktop.org/xorg/driver/xf86-video-dummy/issues],
> +        [xf86-video-dummy])
> +AC_CONFIG_SRCDIR([Makefile.am])
> +AC_CONFIG_HEADERS([config.h])
> +AC_CONFIG_AUX_DIR(.)
> +
> +# Initialize Automake
> +AM_INIT_AUTOMAKE([foreign dist-bzip2])
> +
> +# Require xorg-macros: XORG_DEFAULT_OPTIONS
> +m4_ifndef([XORG_MACROS_VERSION],
> +          [m4_fatal([must install xorg-macros 1.3 or later before running
> autoconf/autogen])])
> +XORG_MACROS_VERSION(1.3)
> +XORG_DEFAULT_OPTIONS
> +
> +# Initialize libtool
> +AC_DISABLE_STATIC
> +AC_PROG_LIBTOOL
> +
> +AH_TOP([#include "xorg-server.h"])
> +
> +# Define a configure option for an alternate module directory
> +AC_ARG_WITH(xorg-module-dir, [  --with-xorg-module-dir=DIR ],
> +                             [ moduledir="$withval" ],
> +                             [ moduledir="$libdir/xorg/modules" ])
> +AC_SUBST(moduledir)
> +
> +
> +# Store the list of server defined optional extensions in REQUIRED_MODULES
> +XORG_DRIVER_CHECK_EXT(RANDR, randrproto)
> +XORG_DRIVER_CHECK_EXT(RENDER, renderproto)
> +
> +# Obtain compiler/linker options for the driver dependencies
> +PKG_CHECK_MODULES(XORG, [xorg-server >= 1.4.99.901] xproto fontsproto
> $REQUIRED_MODULES)
> +
> +# Checks for libraries.
> +
> +
> +DRIVER_NAME=dummy
> +AC_SUBST([DRIVER_NAME])
> +
> +AC_CONFIG_FILES([
> +                Makefile
> +                src/Makefile
> +])
> +AC_OUTPUT
> diff --git a/spice-video-dummy/src/Makefile.am
> b/spice-video-dummy/src/Makefile.am
> new file mode 100644
> index 0000000..c0d82e0
> --- /dev/null
> +++ b/spice-video-dummy/src/Makefile.am
> @@ -0,0 +1,39 @@
> +#  Copyright 2005 Adam Jackson.
> +#
> +#  Permission is hereby granted, free of charge, to any person obtaining a
> +#  copy of this software and associated documentation files (the
> "Software"),
> +#  to deal in the Software without restriction, including without limitation
> +#  on the rights to use, copy, modify, merge, publish, distribute, sub
> +#  license, and/or sell copies of the Software, and to permit persons to
> whom
> +#  the Software is furnished to do so, subject to the following conditions:
> +#
> +#  The above copyright notice and this permission notice (including the next
> +#  paragraph) shall be included in all copies or substantial portions of the
> +#  Software.
> +#
> +#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
> OR
> +#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> +#  FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
> +#  ADAM JACKSON BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
> +#  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
> +#  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> SOFTWARE.
> +
> +
> +# this is obnoxious:
> +# -module lets us name the module exactly how we want
> +# -avoid-version prevents gratuitous .0.0.0 version numbers on the end
> +# _ladir passes a dummy rpath to libtool so the thing will actually link
> +# TODO: -nostdlib/-Bstatic/-lgcc platform magic, not installing the .a, etc.
> +
> +AM_CFLAGS = $(XORG_CFLAGS) $(PCIACCESS_CFLAGS)
> +
> +dummy_drv_la_LTLIBRARIES = dummy_drv.la
> +dummy_drv_la_LDFLAGS = -module -avoid-version
> +dummy_drv_la_LIBADD = $(XORG_LIBS)
> +dummy_drv_ladir = @moduledir@/drivers
> +
> +dummy_drv_la_SOURCES = \
> +         compat-api.h \
> +         dummy_cursor.c \
> +         dummy_driver.c \
> +         dummy.h
> diff --git a/spice-video-dummy/src/compat-api.h
> b/spice-video-dummy/src/compat-api.h
> new file mode 100644
> index 0000000..b74a582
> --- /dev/null
> +++ b/spice-video-dummy/src/compat-api.h
> @@ -0,0 +1,101 @@
> +/*
> + * Copyright 2012 Red Hat, Inc.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> + * copy of this software and associated documentation files (the
> "Software"),
> + * to deal in the Software without restriction, including without limitation
> + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice (including the next
> + * paragraph) shall be included in all copies or substantial portions of the
> + * Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
> OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
> OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> + * DEALINGS IN THE SOFTWARE.
> + *
> + * Author: Dave Airlie <airlied@xxxxxxxxxx>
> + */
> +
> +/* this file provides API compat between server post 1.13 and pre it,
> +   it should be reused inside as many drivers as possible */
> +#ifndef COMPAT_API_H
> +#define COMPAT_API_H
> +
> +#ifndef GLYPH_HAS_GLYPH_PICTURE_ACCESSOR
> +#define GetGlyphPicture(g, s) GlyphPicture((g))[(s)->myNum]
> +#define SetGlyphPicture(g, s, p) GlyphPicture((g))[(s)->myNum] = p
> +#endif
> +
> +#ifndef XF86_HAS_SCRN_CONV
> +#define xf86ScreenToScrn(s) xf86Screens[(s)->myNum]
> +#define xf86ScrnToScreen(s) screenInfo.screens[(s)->scrnIndex]
> +#endif
> +
> +#ifndef XF86_SCRN_INTERFACE
> +
> +#define SCRN_ARG_TYPE int
> +#define SCRN_INFO_PTR(arg1) ScrnInfoPtr pScrn = xf86Screens[(arg1)]
> +
> +#define SCREEN_ARG_TYPE int
> +#define SCREEN_PTR(arg1) ScreenPtr pScreen = screenInfo.screens[(arg1)]
> +
> +#define SCREEN_INIT_ARGS_DECL int i, ScreenPtr pScreen, int argc, char
> **argv
> +
> +#define BLOCKHANDLER_ARGS_DECL int arg, pointer blockData, pointer pTimeout,
> pointer pReadmask
> +#define BLOCKHANDLER_ARGS arg, blockData, pTimeout, pReadmask
> +
> +#define CLOSE_SCREEN_ARGS_DECL int scrnIndex, ScreenPtr pScreen
> +#define CLOSE_SCREEN_ARGS scrnIndex, pScreen
> +
> +#define ADJUST_FRAME_ARGS_DECL int arg, int x, int y, int flags
> +#define ADJUST_FRAME_ARGS(arg, x, y) (arg)->scrnIndex, x, y, 0
> +
> +#define SWITCH_MODE_ARGS_DECL int arg, DisplayModePtr mode, int flags
> +#define SWITCH_MODE_ARGS(arg, m) (arg)->scrnIndex, m, 0
> +
> +#define FREE_SCREEN_ARGS_DECL int arg, int flags
> +#define FREE_SCREEN_ARGS(x) (x)->scrnIndex, 0
> +
> +#define VT_FUNC_ARGS_DECL int arg, int flags
> +#define VT_FUNC_ARGS(flags) pScrn->scrnIndex, (flags)
> +
> +#define XF86_ENABLEDISABLEFB_ARG(x) ((x)->scrnIndex)
> +#else
> +#define SCRN_ARG_TYPE ScrnInfoPtr
> +#define SCRN_INFO_PTR(arg1) ScrnInfoPtr pScrn = (arg1)
> +
> +#define SCREEN_ARG_TYPE ScreenPtr
> +#define SCREEN_PTR(arg1) ScreenPtr pScreen = (arg1)
> +
> +#define SCREEN_INIT_ARGS_DECL ScreenPtr pScreen, int argc, char **argv
> +
> +#define BLOCKHANDLER_ARGS_DECL ScreenPtr arg, pointer pTimeout, pointer
> pReadmask
> +#define BLOCKHANDLER_ARGS arg, pTimeout, pReadmask
> +
> +#define CLOSE_SCREEN_ARGS_DECL ScreenPtr pScreen
> +#define CLOSE_SCREEN_ARGS pScreen
> +
> +#define ADJUST_FRAME_ARGS_DECL ScrnInfoPtr arg, int x, int y
> +#define ADJUST_FRAME_ARGS(arg, x, y) arg, x, y
> +
> +#define SWITCH_MODE_ARGS_DECL ScrnInfoPtr arg, DisplayModePtr mode
> +#define SWITCH_MODE_ARGS(arg, m) arg, m
> +
> +#define FREE_SCREEN_ARGS_DECL ScrnInfoPtr arg
> +#define FREE_SCREEN_ARGS(x) (x)
> +
> +#define VT_FUNC_ARGS_DECL ScrnInfoPtr arg
> +#define VT_FUNC_ARGS(flags) pScrn
> +
> +#define XF86_ENABLEDISABLEFB_ARG(x) (x)
> +
> +#endif
> +
> +#endif
> diff --git a/spice-video-dummy/src/dummy.h b/spice-video-dummy/src/dummy.h
> new file mode 100644
> index 0000000..8e7c43b
> --- /dev/null
> +++ b/spice-video-dummy/src/dummy.h
> @@ -0,0 +1,59 @@
> +
> +/* All drivers should typically include these */
> +#include "xf86.h"
> +#include "xf86_OSproc.h"
> +
> +#include "xf86Cursor.h"
> +
> +#ifdef XvExtension
> +#include "xf86xv.h"
> +#include <X11/extensions/Xv.h>
> +#endif
> +#include <string.h>
> +
> +#include "compat-api.h"
> +
> +/* Supported chipsets */
> +typedef enum {
> +    DUMMY_CHIP
> +} DUMMYType;
> +
> +/* function prototypes */
> +
> +extern Bool DUMMYSwitchMode(SWITCH_MODE_ARGS_DECL);
> +extern void DUMMYAdjustFrame(ADJUST_FRAME_ARGS_DECL);
> +
> +/* in dummy_cursor.c */
> +extern Bool DUMMYCursorInit(ScreenPtr pScrn);
> +extern void DUMMYShowCursor(ScrnInfoPtr pScrn);
> +extern void DUMMYHideCursor(ScrnInfoPtr pScrn);
> +
> +/* globals */
> +typedef struct _color
> +{
> +    int red;
> +    int green;
> +    int blue;
> +} dummy_colors;
> +
> +typedef struct dummyRec
> +{
> +    /* options */
> +    OptionInfoPtr Options;
> +    Bool swCursor;
> +    /* proc pointer */
> +    CloseScreenProcPtr CloseScreen;
> +    xf86CursorInfoPtr CursorInfo;
> +
> +    Bool DummyHWCursorShown;
> +    int cursorX, cursorY;
> +    int cursorFG, cursorBG;
> +
> +    dummy_colors colors[1024];
> +    Bool        (*CreateWindow)() ;     /* wrapped CreateWindow */
> +    Bool prop;
> +} DUMMYRec, *DUMMYPtr;
> +
> +/* The privates of the DUMMY driver */
> +#define DUMMYPTR(p)	((DUMMYPtr)((p)->driverPrivate))
> +
> diff --git a/spice-video-dummy/src/dummy_cursor.c
> b/spice-video-dummy/src/dummy_cursor.c
> new file mode 100644
> index 0000000..d7c67c6
> --- /dev/null
> +++ b/spice-video-dummy/src/dummy_cursor.c
> @@ -0,0 +1,102 @@
> +#ifdef HAVE_CONFIG_H
> +#include "config.h"
> +#endif
> +
> +/* All drivers should typically include these */
> +#include "xf86.h"
> +#include "xf86_OSproc.h"
> +
> +#include "xf86Cursor.h"
> +#include "cursorstr.h"
> +/* Driver specific headers */
> +#include "dummy.h"
> +
> +static void
> +dummyShowCursor(ScrnInfoPtr pScrn)
> +{
> +    DUMMYPtr dPtr = DUMMYPTR(pScrn);
> +
> +    /* turn cursor on */
> +    dPtr->DummyHWCursorShown = TRUE;
> +}
> +
> +static void
> +dummyHideCursor(ScrnInfoPtr pScrn)
> +{
> +    DUMMYPtr dPtr = DUMMYPTR(pScrn);
> +
> +    /*
> +     * turn cursor off
> +     *
> +     */
> +    dPtr->DummyHWCursorShown = FALSE;
> +}
> +
> +#define MAX_CURS 64
> +
> +static void
> +dummySetCursorPosition(ScrnInfoPtr pScrn, int x, int y)
> +{
> +    DUMMYPtr dPtr = DUMMYPTR(pScrn);
> +
> +    dPtr->cursorX = x;
> +    dPtr->cursorY = y;
> +}
> +
> +static void
> +dummySetCursorColors(ScrnInfoPtr pScrn, int bg, int fg)
> +{
> +    DUMMYPtr dPtr = DUMMYPTR(pScrn);
> +
> +    dPtr->cursorFG = fg;
> +    dPtr->cursorBG = bg;
> +}
> +
> +static void
> +dummyLoadCursorImage(ScrnInfoPtr pScrn, unsigned char *src)
> +{
> +}
> +
> +static Bool
> +dummyUseHWCursor(ScreenPtr pScr, CursorPtr pCurs)
> +{
> +    DUMMYPtr dPtr = DUMMYPTR(xf86ScreenToScrn(pScr));
> +    return(!dPtr->swCursor);
> +}
> +
> +#if 0
> +static unsigned char*
> +dummyRealizeCursor(xf86CursorInfoPtr infoPtr, CursorPtr pCurs)
> +{
> +    return NULL;
> +}
> +#endif
> +
> +Bool
> +DUMMYCursorInit(ScreenPtr pScreen)
> +{
> +    DUMMYPtr dPtr = DUMMYPTR(xf86ScreenToScrn(pScreen));
> +
> +    xf86CursorInfoPtr infoPtr;
> +    infoPtr = xf86CreateCursorInfoRec();
> +    if(!infoPtr) return FALSE;
> +
> +    dPtr->CursorInfo = infoPtr;
> +
> +    infoPtr->MaxHeight = 64;
> +    infoPtr->MaxWidth = 64;
> +    infoPtr->Flags = HARDWARE_CURSOR_TRUECOLOR_AT_8BPP;
> +
> +    infoPtr->SetCursorColors = dummySetCursorColors;
> +    infoPtr->SetCursorPosition = dummySetCursorPosition;
> +    infoPtr->LoadCursorImage = dummyLoadCursorImage;
> +    infoPtr->HideCursor = dummyHideCursor;
> +    infoPtr->ShowCursor = dummyShowCursor;
> +    infoPtr->UseHWCursor = dummyUseHWCursor;
> +/*     infoPtr->RealizeCursor = dummyRealizeCursor; */
> +
> +    return(xf86InitCursor(pScreen, infoPtr));
> +}
> +
> +
> +
> diff --git a/spice-video-dummy/src/dummy_driver.c
> b/spice-video-dummy/src/dummy_driver.c
> new file mode 100644
> index 0000000..b4b42f7
> --- /dev/null
> +++ b/spice-video-dummy/src/dummy_driver.c
> @@ -0,0 +1,740 @@
> +
> +/*
> + * Copyright 2002, SuSE Linux AG, Author: Egbert Eich
> + */
> +
> +#ifdef HAVE_CONFIG_H
> +#include "config.h"
> +#endif
> +
> +/* All drivers should typically include these */
> +#include "xf86.h"
> +#include "xf86_OSproc.h"
> +
> +/* All drivers initialising the SW cursor need this */
> +#include "mipointer.h"
> +
> +/* All drivers using the mi colormap manipulation need this */
> +#include "micmap.h"
> +
> +/* identifying atom needed by magnifiers */
> +#include <X11/Xatom.h>
> +#include "property.h"
> +
> +#include "xf86cmap.h"
> +
> +#include "xf86fbman.h"
> +
> +#include "fb.h"
> +
> +#include "picturestr.h"
> +
> +/*
> + * Driver data structures.
> + */
> +#include "dummy.h"
> +
> +/* These need to be checked */
> +#include <X11/X.h>
> +#include <X11/Xproto.h>
> +#include "scrnintstr.h"
> +#include "servermd.h"
> +
> +/* Mandatory functions */
> +static const OptionInfoRec *	DUMMYAvailableOptions(int chipid, int busid);
> +static void     DUMMYIdentify(int flags);
> +static Bool     DUMMYProbe(DriverPtr drv, int flags);
> +static Bool     DUMMYPreInit(ScrnInfoPtr pScrn, int flags);
> +static Bool     DUMMYScreenInit(SCREEN_INIT_ARGS_DECL);
> +static Bool     DUMMYEnterVT(VT_FUNC_ARGS_DECL);
> +static void     DUMMYLeaveVT(VT_FUNC_ARGS_DECL);
> +static Bool     DUMMYCloseScreen(CLOSE_SCREEN_ARGS_DECL);
> +static Bool     DUMMYCreateWindow(WindowPtr pWin);
> +static void     DUMMYFreeScreen(FREE_SCREEN_ARGS_DECL);
> +static ModeStatus DUMMYValidMode(SCRN_ARG_TYPE arg, DisplayModePtr mode,
> +                                 Bool verbose, int flags);
> +static Bool	DUMMYSaveScreen(ScreenPtr pScreen, int mode);
> +
> +/* Internally used functions */
> +static Bool	dummyDriverFunc(ScrnInfoPtr pScrn, xorgDriverFuncOp op,
> +				pointer ptr);
> +
> +
> +/* static void     DUMMYDisplayPowerManagementSet(ScrnInfoPtr pScrn, */
> +/* 				int PowerManagementMode, int flags); */
> +
> +#define DUMMY_VERSION 4000
> +#define DUMMY_NAME "DUMMY"
> +#define DUMMY_DRIVER_NAME "dummy"
> +
> +#define DUMMY_MAJOR_VERSION PACKAGE_VERSION_MAJOR
> +#define DUMMY_MINOR_VERSION PACKAGE_VERSION_MINOR
> +#define DUMMY_PATCHLEVEL PACKAGE_VERSION_PATCHLEVEL
> +
> +#define DUMMY_MAX_WIDTH 32767
> +#define DUMMY_MAX_HEIGHT 32767
> +
> +/*
> + * This is intentionally screen-independent.  It indicates the binding
> + * choice made in the first PreInit.
> + */
> +static int pix24bpp = 0;
> +
> +
> +/*
> + * This contains the functions needed by the server after loading the driver
> + * module.  It must be supplied, and gets passed back by the SetupProc
> + * function in the dynamic case.  In the static case, a reference to this
> + * is compiled in, and this requires that the name of this DriverRec be
> + * an upper-case version of the driver name.
> + */
> +
> +_X_EXPORT DriverRec DUMMY = {
> +    DUMMY_VERSION,
> +    DUMMY_DRIVER_NAME,
> +    DUMMYIdentify,
> +    DUMMYProbe,
> +    DUMMYAvailableOptions,
> +    NULL,
> +    0,
> +    dummyDriverFunc
> +};
> +
> +static SymTabRec DUMMYChipsets[] = {
> +    { DUMMY_CHIP,   "dummy" },
> +    { -1,		 NULL }
> +};
> +
> +typedef enum {
> +    OPTION_SW_CURSOR
> +} DUMMYOpts;
> +
> +static const OptionInfoRec DUMMYOptions[] = {
> +    { OPTION_SW_CURSOR,	"SWcursor",	OPTV_BOOLEAN,	{0}, FALSE },
> +    { -1,                  NULL,           OPTV_NONE,	{0}, FALSE }
> +};
> +
> +#ifdef XFree86LOADER
> +
> +static MODULESETUPPROTO(dummySetup);
> +
> +static XF86ModuleVersionInfo dummyVersRec =
> +{
> +	"dummy",
> +	MODULEVENDORSTRING,
> +	MODINFOSTRING1,
> +	MODINFOSTRING2,
> +	XORG_VERSION_CURRENT,
> +	DUMMY_MAJOR_VERSION, DUMMY_MINOR_VERSION, DUMMY_PATCHLEVEL,
> +	ABI_CLASS_VIDEODRV,
> +	ABI_VIDEODRV_VERSION,
> +	MOD_CLASS_VIDEODRV,
> +	{0,0,0,0}
> +};
> +
> +/*
> + * This is the module init data.
> + * Its name has to be the driver name followed by ModuleData
> + */
> +_X_EXPORT XF86ModuleData dummyModuleData = { &dummyVersRec, dummySetup, NULL
> };
> +
> +static pointer
> +dummySetup(pointer module, pointer opts, int *errmaj, int *errmin)
> +{
> +    static Bool setupDone = FALSE;
> +
> +    if (!setupDone) {
> +	setupDone = TRUE;
> +        xf86AddDriver(&DUMMY, module, HaveDriverFuncs);
> +
> +	/*
> +	 * Modules that this driver always requires can be loaded here
> +	 * by calling LoadSubModule().
> +	 */
> +
> +	/*
> +	 * The return value must be non-NULL on success even though there
> +	 * is no TearDownProc.
> +	 */
> +	return (pointer)1;
> +    } else {
> +	if (errmaj) *errmaj = LDR_ONCEONLY;
> +	return NULL;
> +    }
> +}
> +
> +#endif /* XFree86LOADER */
> +
> +static Bool
> +DUMMYGetRec(ScrnInfoPtr pScrn)
> +{
> +    /*
> +     * Allocate a DUMMYRec, and hook it into pScrn->driverPrivate.
> +     * pScrn->driverPrivate is initialised to NULL, so we can check if
> +     * the allocation has already been done.
> +     */
> +    if (pScrn->driverPrivate != NULL)
> +	return TRUE;
> +
> +    pScrn->driverPrivate = xnfcalloc(sizeof(DUMMYRec), 1);
> +
> +    if (pScrn->driverPrivate == NULL)
> +	return FALSE;
> +    return TRUE;
> +}
> +
> +static void
> +DUMMYFreeRec(ScrnInfoPtr pScrn)
> +{
> +    if (pScrn->driverPrivate == NULL)
> +	return;
> +    free(pScrn->driverPrivate);
> +    pScrn->driverPrivate = NULL;
> +}
> +
> +static const OptionInfoRec *
> +DUMMYAvailableOptions(int chipid, int busid)
> +{
> +    return DUMMYOptions;
> +}
> +
> +/* Mandatory */
> +static void
> +DUMMYIdentify(int flags)
> +{
> +    xf86PrintChipsets(DUMMY_NAME, "Driver for Dummy chipsets",
> +			DUMMYChipsets);
> +}
> +
> +/* Mandatory */
> +static Bool
> +DUMMYProbe(DriverPtr drv, int flags)
> +{
> +    Bool foundScreen = FALSE;
> +    int numDevSections, numUsed;
> +    GDevPtr *devSections;
> +    int i;
> +
> +    if (flags & PROBE_DETECT)
> +	return FALSE;
> +    /*
> +     * Find the config file Device sections that match this
> +     * driver, and return if there are none.
> +     */
> +    if ((numDevSections = xf86MatchDevice(DUMMY_DRIVER_NAME,
> +					  &devSections)) <= 0) {
> +	return FALSE;
> +    }
> +
> +    numUsed = numDevSections;
> +
> +    if (numUsed > 0) {
> +
> +	for (i = 0; i < numUsed; i++) {
> +	    ScrnInfoPtr pScrn = NULL;
> +	    int entityIndex =
> +		xf86ClaimNoSlot(drv,DUMMY_CHIP,devSections[i],TRUE);
> +	    /* Allocate a ScrnInfoRec and claim the slot */
> +	    if ((pScrn = xf86AllocateScreen(drv,0 ))) {
> +		   xf86AddEntityToScreen(pScrn,entityIndex);
> +		    pScrn->driverVersion = DUMMY_VERSION;
> +		    pScrn->driverName    = DUMMY_DRIVER_NAME;
> +		    pScrn->name          = DUMMY_NAME;
> +		    pScrn->Probe         = DUMMYProbe;
> +		    pScrn->PreInit       = DUMMYPreInit;
> +		    pScrn->ScreenInit    = DUMMYScreenInit;
> +		    pScrn->SwitchMode    = DUMMYSwitchMode;
> +		    pScrn->AdjustFrame   = DUMMYAdjustFrame;
> +		    pScrn->EnterVT       = DUMMYEnterVT;
> +		    pScrn->LeaveVT       = DUMMYLeaveVT;
> +		    pScrn->FreeScreen    = DUMMYFreeScreen;
> +		    pScrn->ValidMode     = DUMMYValidMode;
> +
> +		    foundScreen = TRUE;
> +	    }
> +	}
> +    }
> +
> +    free(devSections);
> +
> +    return foundScreen;
> +}
> +
> +# define RETURN \
> +    { DUMMYFreeRec(pScrn);\
> +			    return FALSE;\
> +					     }
> +
> +/* Mandatory */
> +Bool
> +DUMMYPreInit(ScrnInfoPtr pScrn, int flags)
> +{
> +    ClockRangePtr clockRanges;
> +    int i;
> +    DUMMYPtr dPtr;
> +    int maxClock = 300000;
> +    GDevPtr device = xf86GetEntityInfo(pScrn->entityList[0])->device;
> +
> +    if (flags & PROBE_DETECT)
> +	return TRUE;
> +
> +    /* Allocate the DummyRec driverPrivate */
> +    if (!DUMMYGetRec(pScrn)) {
> +	return FALSE;
> +    }
> +
> +    dPtr = DUMMYPTR(pScrn);
> +
> +    pScrn->chipset = (char *)xf86TokenToString(DUMMYChipsets,
> +					       DUMMY_CHIP);
> +
> +    xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Chipset is a DUMMY\n");
> +
> +    pScrn->monitor = pScrn->confScreen->monitor;
> +
> +    if (!xf86SetDepthBpp(pScrn, 0, 0, 0,  Support24bppFb | Support32bppFb))
> +	return FALSE;
> +    else {
> +	/* Check that the returned depth is one we support */
> +	switch (pScrn->depth) {
> +	case 8:
> +	case 15:
> +	case 16:
> +	case 24:
> +	case 30:
> +	    break;
> +	default:
> +	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
> +		       "Given depth (%d) is not supported by this driver\n",
> +		       pScrn->depth);
> +	    return FALSE;
> +	}
> +    }
> +
> +    xf86PrintDepthBpp(pScrn);
> +    if (pScrn->depth == 8)
> +	pScrn->rgbBits = 8;
> +
> +    /* Get the depth24 pixmap format */
> +    if (pScrn->depth == 24 && pix24bpp == 0)
> +	pix24bpp = xf86GetBppFromDepth(pScrn, 24);
> +
> +    /*
> +     * This must happen after pScrn->display has been set because
> +     * xf86SetWeight references it.
> +     */
> +    if (pScrn->depth > 8) {
> +	/* The defaults are OK for us */
> +	rgb zeros = {0, 0, 0};
> +
> +	if (!xf86SetWeight(pScrn, zeros, zeros)) {
> +	    return FALSE;
> +	} else {
> +	    /* XXX check that weight returned is supported */
> +	    ;
> +	}
> +    }
> +
> +    if (!xf86SetDefaultVisual(pScrn, -1))
> +	return FALSE;
> +
> +    if (pScrn->depth > 1) {
> +	Gamma zeros = {0.0, 0.0, 0.0};
> +
> +	if (!xf86SetGamma(pScrn, zeros))
> +	    return FALSE;
> +    }
> +
> +    xf86CollectOptions(pScrn, device->options);
> +    /* Process the options */
> +    if (!(dPtr->Options = malloc(sizeof(DUMMYOptions))))
> +	return FALSE;
> +    memcpy(dPtr->Options, DUMMYOptions, sizeof(DUMMYOptions));
> +
> +    xf86ProcessOptions(pScrn->scrnIndex, pScrn->options, dPtr->Options);
> +
> +    xf86GetOptValBool(dPtr->Options, OPTION_SW_CURSOR,&dPtr->swCursor);
> +
> +    if (device->videoRam != 0) {
> +	pScrn->videoRam = device->videoRam;
> +	xf86DrvMsg(pScrn->scrnIndex, X_CONFIG, "VideoRAM: %d kByte\n",
> +		   pScrn->videoRam);
> +    } else {
> +	pScrn->videoRam = 4096;
> +	xf86DrvMsg(pScrn->scrnIndex, X_PROBED, "VideoRAM: %d kByte\n",
> +		   pScrn->videoRam);
> +    }
> +
> +    if (device->dacSpeeds[0] != 0) {
> +	maxClock = device->dacSpeeds[0];
> +	xf86DrvMsg(pScrn->scrnIndex, X_CONFIG, "Max Clock: %d kHz\n",
> +		   maxClock);
> +    } else {
> +	xf86DrvMsg(pScrn->scrnIndex, X_PROBED, "Max Clock: %d kHz\n",
> +		   maxClock);
> +    }
> +
> +    pScrn->progClock = TRUE;
> +    /*
> +     * Setup the ClockRanges, which describe what clock ranges are
> available,
> +     * and what sort of modes they can be used for.
> +     */
> +    clockRanges = (ClockRangePtr)xnfcalloc(sizeof(ClockRange), 1);
> +    clockRanges->next = NULL;
> +    clockRanges->ClockMulFactor = 1;
> +    clockRanges->minClock = 11000;   /* guessed §§§ */
> +    clockRanges->maxClock = maxClock;
> +    clockRanges->clockIndex = -1;		/* programmable */
> +    clockRanges->interlaceAllowed = TRUE;
> +    clockRanges->doubleScanAllowed = TRUE;
> +
> +    /* Subtract memory for HW cursor */
> +
> +
> +    {
> +	int apertureSize = (pScrn->videoRam * 1024);
> +	i = xf86ValidateModes(pScrn, pScrn->monitor->Modes,
> +			      pScrn->display->modes, clockRanges,
> +			      NULL, 256, DUMMY_MAX_WIDTH,
> +			      (8 * pScrn->bitsPerPixel),
> +			      128, DUMMY_MAX_HEIGHT, pScrn->display->virtualX,
> +			      pScrn->display->virtualY, apertureSize,
> +			      LOOKUP_BEST_REFRESH);
> +
> +       if (i == -1)
> +           RETURN;
> +    }
> +
> +    /* Prune the modes marked as invalid */
> +    xf86PruneDriverModes(pScrn);
> +
> +    if (i == 0 || pScrn->modes == NULL) {
> +	xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "No valid modes found\n");
> +	RETURN;
> +    }
> +
> +    /*
> +     * Set the CRTC parameters for all of the modes based on the type
> +     * of mode, and the chipset's interlace requirements.
> +     *
> +     * Calling this is required if the mode->Crtc* values are used by the
> +     * driver and if the driver doesn't provide code to set them.  They
> +     * are not pre-initialised at all.
> +     */
> +    xf86SetCrtcForModes(pScrn, 0);
> +
> +    /* Set the current mode to the first in the list */
> +    pScrn->currentMode = pScrn->modes;
> +
> +    /* Print the list of modes being used */
> +    xf86PrintModes(pScrn);
> +
> +    /* If monitor resolution is set on the command line, use it */
> +    xf86SetDpi(pScrn, 0, 0);
> +
> +    if (xf86LoadSubModule(pScrn, "fb") == NULL) {
> +	RETURN;
> +    }
> +
> +    if (!dPtr->swCursor) {
> +	if (!xf86LoadSubModule(pScrn, "ramdac"))
> +	    RETURN;
> +    }
> +
> +    /* We have no contiguous physical fb in physical memory */
> +    pScrn->memPhysBase = 0;
> +    pScrn->fbOffset = 0;
> +
> +    return TRUE;
> +}
> +#undef RETURN
> +
> +/* Mandatory */
> +static Bool
> +DUMMYEnterVT(VT_FUNC_ARGS_DECL)
> +{
> +    return TRUE;
> +}
> +
> +/* Mandatory */
> +static void
> +DUMMYLeaveVT(VT_FUNC_ARGS_DECL)
> +{
> +}
> +
> +static void
> +DUMMYLoadPalette(
> +   ScrnInfoPtr pScrn,
> +   int numColors,
> +   int *indices,
> +   LOCO *colors,
> +   VisualPtr pVisual
> +){
> +   int i, index, shift, Gshift;
> +   DUMMYPtr dPtr = DUMMYPTR(pScrn);
> +
> +   switch(pScrn->depth) {
> +   case 15:
> +	shift = Gshift = 1;
> +	break;
> +   case 16:
> +	shift = 0;
> +        Gshift = 0;
> +	break;
> +   default:
> +	shift = Gshift = 0;
> +	break;
> +   }
> +
> +   for(i = 0; i < numColors; i++) {
> +       index = indices[i];
> +       dPtr->colors[index].red = colors[index].red << shift;
> +       dPtr->colors[index].green = colors[index].green << Gshift;
> +       dPtr->colors[index].blue = colors[index].blue << shift;
> +   }
> +
> +}
> +
> +static ScrnInfoPtr DUMMYScrn; /* static-globalize it */
> +
> +/* Mandatory */
> +static Bool
> +DUMMYScreenInit(SCREEN_INIT_ARGS_DECL)
> +{
> +    ScrnInfoPtr pScrn;
> +    DUMMYPtr dPtr;
> +    int ret;
> +    VisualPtr visual;
> +    void *pixels;
> +
> +    /*
> +     * we need to get the ScrnInfoRec for this screen, so let's allocate
> +     * one first thing
> +     */
> +    pScrn = xf86ScreenToScrn(pScreen);
> +    dPtr = DUMMYPTR(pScrn);
> +    DUMMYScrn = pScrn;
> +
> +
> +    if (!(pixels = malloc(pScrn->videoRam * 1024)))
> +	return FALSE;
> +
> +    /*
> +     * Reset visual list.
> +     */
> +    miClearVisualTypes();
> +
> +    /* Setup the visuals we support. */
> +
> +    if (!miSetVisualTypes(pScrn->depth,
> +      		      miGetDefaultVisualMask(pScrn->depth),
> +		      pScrn->rgbBits, pScrn->defaultVisual))
> +         return FALSE;
> +
> +    if (!miSetPixmapDepths ()) return FALSE;
> +
> +    /*
> +     * Call the framebuffer layer's ScreenInit function, and fill in other
> +     * pScreen fields.
> +     */
> +    ret = fbScreenInit(pScreen, pixels,
> +			    pScrn->virtualX, pScrn->virtualY,
> +			    pScrn->xDpi, pScrn->yDpi,
> +			    pScrn->displayWidth, pScrn->bitsPerPixel);
> +    if (!ret)
> +	return FALSE;
> +
> +    if (pScrn->depth > 8) {
> +        /* Fixup RGB ordering */
> +        visual = pScreen->visuals + pScreen->numVisuals;
> +        while (--visual >= pScreen->visuals) {
> +	    if ((visual->class | DynamicClass) == DirectColor) {
> +		visual->offsetRed = pScrn->offset.red;
> +		visual->offsetGreen = pScrn->offset.green;
> +		visual->offsetBlue = pScrn->offset.blue;
> +		visual->redMask = pScrn->mask.red;
> +		visual->greenMask = pScrn->mask.green;
> +		visual->blueMask = pScrn->mask.blue;
> +	    }
> +	}
> +    }
> +
> +    /* must be after RGB ordering fixed */
> +    fbPictureInit(pScreen, 0, 0);
> +
> +    xf86SetBlackWhitePixels(pScreen);
> +
> +    if (dPtr->swCursor)
> +	xf86DrvMsg(pScrn->scrnIndex, X_CONFIG, "Using Software Cursor.\n");
> +
> +    {
> +
> +
> +	BoxRec AvailFBArea;
> +	int lines = pScrn->videoRam * 1024 /
> +	    (pScrn->displayWidth * (pScrn->bitsPerPixel >> 3));
> +	AvailFBArea.x1 = 0;
> +	AvailFBArea.y1 = 0;
> +	AvailFBArea.x2 = pScrn->displayWidth;
> +	AvailFBArea.y2 = lines;
> +	xf86InitFBManager(pScreen, &AvailFBArea);
> +
> +	xf86DrvMsg(pScrn->scrnIndex, X_INFO,
> +		   "Using %i scanlines of offscreen memory \n"
> +		   , lines - pScrn->virtualY);
> +    }
> +
> +    xf86SetBackingStore(pScreen);
> +    xf86SetSilkenMouse(pScreen);
> +
> +    /* Initialise cursor functions */
> +    miDCInitialize (pScreen, xf86GetPointerScreenFuncs());
> +
> +
> +    if (!dPtr->swCursor) {
> +      /* HW cursor functions */
> +      if (!DUMMYCursorInit(pScreen)) {
> +	  xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
> +		     "Hardware cursor initialization failed\n");
> +	  return FALSE;
> +      }
> +    }
> +
> +    /* Initialise default colourmap */
> +    if(!miCreateDefColormap(pScreen))
> +	return FALSE;
> +
> +    if (!xf86HandleColormaps(pScreen, 1024, pScrn->rgbBits,
> +                         DUMMYLoadPalette, NULL,
> +                         CMAP_PALETTED_TRUECOLOR
> +			     | CMAP_RELOAD_ON_MODE_SWITCH))
> +	return FALSE;
> +
> +    pScreen->SaveScreen = DUMMYSaveScreen;
> +
> +
> +    /* Wrap the current CloseScreen function */
> +    dPtr->CloseScreen = pScreen->CloseScreen;
> +    pScreen->CloseScreen = DUMMYCloseScreen;
> +
> +    /* Wrap the current CreateWindow function */
> +    dPtr->CreateWindow = pScreen->CreateWindow;
> +    pScreen->CreateWindow = DUMMYCreateWindow;
> +
> +    /* Report any unused options (only for the first generation) */
> +    if (serverGeneration == 1) {
> +	xf86ShowUnusedOptions(pScrn->scrnIndex, pScrn->options);
> +    }
> +
> +    return TRUE;
> +}
> +
> +/* Mandatory */
> +Bool
> +DUMMYSwitchMode(SWITCH_MODE_ARGS_DECL)
> +{
> +    return TRUE;
> +}
> +
> +/* Mandatory */
> +void
> +DUMMYAdjustFrame(ADJUST_FRAME_ARGS_DECL)
> +{
> +}
> +
> +/* Mandatory */
> +static Bool
> +DUMMYCloseScreen(CLOSE_SCREEN_ARGS_DECL)
> +{
> +    ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
> +    DUMMYPtr dPtr = DUMMYPTR(pScrn);
> +
> +    free(pScreen->GetScreenPixmap(pScreen)->devPrivate.ptr);
> +
> +    if (dPtr->CursorInfo)
> +	xf86DestroyCursorInfoRec(dPtr->CursorInfo);
> +
> +    pScrn->vtSema = FALSE;
> +    pScreen->CloseScreen = dPtr->CloseScreen;
> +    return (*pScreen->CloseScreen)(CLOSE_SCREEN_ARGS);
> +}
> +
> +/* Optional */
> +static void
> +DUMMYFreeScreen(FREE_SCREEN_ARGS_DECL)
> +{
> +    SCRN_INFO_PTR(arg);
> +    DUMMYFreeRec(pScrn);
> +}
> +
> +static Bool
> +DUMMYSaveScreen(ScreenPtr pScreen, int mode)
> +{
> +    return TRUE;
> +}
> +
> +/* Optional */
> +static ModeStatus
> +DUMMYValidMode(SCRN_ARG_TYPE arg, DisplayModePtr mode, Bool verbose, int
> flags)
> +{
> +    return(MODE_OK);
> +}
> +
> +Atom VFB_PROP  = 0;
> +#define  VFB_PROP_NAME  "VFB_IDENT"
> +
> +static Bool
> +DUMMYCreateWindow(WindowPtr pWin)
> +{
> +    ScreenPtr pScreen = pWin->drawable.pScreen;
> +    DUMMYPtr dPtr = DUMMYPTR(DUMMYScrn);
> +    WindowPtr pWinRoot;
> +    int ret;
> +
> +    pScreen->CreateWindow = dPtr->CreateWindow;
> +    ret = pScreen->CreateWindow(pWin);
> +    dPtr->CreateWindow = pScreen->CreateWindow;
> +    pScreen->CreateWindow = DUMMYCreateWindow;
> +
> +    if(ret != TRUE)
> +	return(ret);
> +
> +    if(dPtr->prop == FALSE) {
> +#if GET_ABI_MAJOR(ABI_VIDEODRV_VERSION) < 8
> +        pWinRoot = WindowTable[DUMMYScrn->pScreen->myNum];
> +#else
> +        pWinRoot = DUMMYScrn->pScreen->root;
> +#endif
> +        if (! ValidAtom(VFB_PROP))
> +            VFB_PROP = MakeAtom(VFB_PROP_NAME, strlen(VFB_PROP_NAME), 1);
> +
> +        ret = dixChangeWindowProperty(serverClient, pWinRoot, VFB_PROP,
> +                                      XA_STRING, 8, PropModeReplace,
> +                                      (int)4, (pointer)"TRUE", FALSE);
> +	if( ret != Success)
> +		ErrorF("Could not set VFB root window property");
> +        dPtr->prop = TRUE;
> +
> +	return TRUE;
> +    }
> +    return TRUE;
> +}
> +
> +#ifndef HW_SKIP_CONSOLE
> +#define HW_SKIP_CONSOLE 4
> +#endif
> +
> +static Bool
> +dummyDriverFunc(ScrnInfoPtr pScrn, xorgDriverFuncOp op, pointer ptr)
> +{
> +    CARD32 *flag;
> +
> +    switch (op) {
> +	case GET_REQUIRED_HW_INTERFACES:
> +	    flag = (CARD32*)ptr;
> +	    (*flag) = HW_SKIP_CONSOLE;
> +	    return TRUE;
> +	default:
> +	    return FALSE;
> +    }
> +}
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