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2018-04-27console: introduce dpy_gfx_update_fullTina Zhang
dpy_gfx_update_full is used to do the whole display surface update. This function is proposed by Gerd Hoffmann. Signed-off-by: Tina Zhang <tina.zhang@intel.com> Message-id: 1524820266-27079-2-git-send-email-tina.zhang@intel.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-04-09ui: add ctrl modifier support to kbd_put_qcode_console()Gerd Hoffmann
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20180321135041.15768-2-kraxel@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-03-13console: minimal hotplug suportGerd Hoffmann
This patch allows to unbind devices from QemuConsoles, using the new graphic_console_close() function. The QemuConsole will show a static display then, saying the device was unplugged. When re-plugging a display later on the QemuConsole will be reused. Eventually we will allocate and release QemuConsoles dynamically at some point in the future, that'll need more infrastructure though to notify user interfaces (gtk, sdl, spice, ...) about QemuConsoles coming and going. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2018-03-12vnc: deal with surface NULL pointersGerd Hoffmann
Secondary displays in multihead setups are allowed to have a NULL DisplaySurface. Typically user interfaces handle this by hiding the window which shows the display in question. This isn't an option for vnc though because it simply hasn't a concept of windows or outputs. So handle the situation by showing a placeholder DisplaySurface instead. Also check in console_select whenever a surface is preset in the first place before requesting an update. This fixes a segfault which can be triggered by switching to an unused display (via vtrl-alt-<nr>) in a multihead setup, for example using -device virtio-vga,max_outputs=2. Cc: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-id: 20180308161803.6152-1-kraxel@redhat.com
2018-03-05Merge remote-tracking branch 'remotes/kraxel/tags/ui-20180305-pull-request' ↵Peter Maydell
into staging ui: build curses, gtk and sdl as modules. # gpg: Signature made Mon 05 Mar 2018 08:48:24 GMT # gpg: using RSA key 4CB6D8EED3E87138 # gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" # gpg: aka "Gerd Hoffmann <gerd@kraxel.org>" # gpg: aka "Gerd Hoffmann (private) <kraxel@gmail.com>" # Primary key fingerprint: A032 8CFF B93A 17A7 9901 FE7D 4CB6 D8EE D3E8 7138 * remotes/kraxel/tags/ui-20180305-pull-request: ui/sdl: build as module audio: rename CONFIG_* to CONFIG_AUDIO_* ui/curses: build as module ui/gtk: build as module configure: opengl doesn't depend on x11 configure: add X11 vars to config-host.mak console: add ui module loading support console: add and use qemu_display_find_default egl-headless: switch over to new display registry curses: switch over to new display registry cocoa: switch over to new display registry sdl: switch over to new display registry console: add qemu display registry, add gtk Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-03-05console: add and use qemu_display_find_defaultGerd Hoffmann
Using the new display registry instead of #ifdefs in vl.c. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20180301100547.18962-7-kraxel@redhat.com
2018-03-05egl-headless: switch over to new display registryGerd Hoffmann
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20180301100547.18962-6-kraxel@redhat.com
2018-03-05curses: switch over to new display registryGerd Hoffmann
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20180301100547.18962-5-kraxel@redhat.com
2018-03-05cocoa: switch over to new display registryGerd Hoffmann
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20180301100547.18962-4-kraxel@redhat.com
2018-03-05sdl: switch over to new display registryGerd Hoffmann
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20180301100547.18962-3-kraxel@redhat.com
2018-03-05console: add qemu display registry, add gtkGerd Hoffmann
Add a registry for user interfaces. Add qemu_display_init and qemu_display_early_init helper functions for display initialization. Hook up gtk ui as first user. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20180301100547.18962-2-kraxel@redhat.com
2018-03-02Include less of the generated modular QAPI headersMarkus Armbruster
In my "build everything" tree, a change to the types in qapi-schema.json triggers a recompile of about 4800 out of 5100 objects. The previous commit split up qmp-commands.h, qmp-event.h, qmp-visit.h, qapi-types.h. Each of these headers still includes all its shards. Reduce compile time by including just the shards we actually need. To illustrate the benefits: adding a type to qapi/migration.json now recompiles some 2300 instead of 4800 objects. The next commit will improve it further. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180211093607.27351-24-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> [eblake: rebase to master] Signed-off-by: Eric Blake <eblake@redhat.com>
2018-02-22console/opengl: split up dpy_gl_cursor opsGerd Hoffmann
Split the cursor callback into two, one for setting the dmabuf, one for setting the position. Also add hotspot information. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20180220110433.20353-2-kraxel@redhat.com
2018-02-20cocoa: use DisplayOptionsGerd Hoffmann
Switch cocoa ui to use qapi DisplayOptions for configuration. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20180202111022.19269-10-kraxel@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-02-20curses: use DisplayOptionsGerd Hoffmann
Switch curses ui to use qapi DisplayOptions for configuration. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20180202111022.19269-9-kraxel@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-02-20egl-headless: use DisplayOptionsGerd Hoffmann
Switch egl-headless ui to use qapi DisplayOptions for configuration. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20180202111022.19269-8-kraxel@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-02-20sdl: use DisplayOptionsGerd Hoffmann
Switch sdl ui to use qapi DisplayOptions for configuration. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20180202111022.19269-6-kraxel@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-02-20gtk: add and use DisplayOptions + DisplayGTKGerd Hoffmann
Add QAPI DisplayType enum, DisplayOptions union and DisplayGTK struct. Switch gtk configuration to use the qapi type. Some bookkeeping (fullscreen for example) is done twice now, this is temporary until more/all UIs are switched over to qapi configuration. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20180202111022.19269-5-kraxel@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-02-09Include qapi/qmp/qdict.h exactly where neededMarkus Armbruster
This cleanup makes the number of objects depending on qapi/qmp/qdict.h drop from 4550 (out of 4743) to 368 in my "build everything" tree. For qapi/qmp/qobject.h, the number drops from 4552 to 390. While there, separate #include from file comment with a blank line. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180201111846.21846-13-armbru@redhat.com>
2018-02-09Include qapi/error.h exactly where neededMarkus Armbruster
This cleanup makes the number of objects depending on qapi/error.h drop from 1910 (out of 4743) to 1612 in my "build everything" tree. While there, separate #include from file comment with a blank line, and drop a useless comment on why qemu/osdep.h is included first. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180201111846.21846-5-armbru@redhat.com> [Semantic conflict with commit 34e304e975 resolved, OSX breakage fixed]
2018-02-09Drop superfluous includes of qapi-types.h and test-qapi-types.hMarkus Armbruster
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180201111846.21846-4-armbru@redhat.com>
2018-02-09Clean up includesMarkus Armbruster
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes, with the change to target/s390x/gen-features.c manually reverted, and blank lines around deletions collapsed. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20180201111846.21846-3-armbru@redhat.com>
2018-02-09vnc: use stubs for CONFIG_VNC=n dummy functionsGerd Hoffmann
Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Markus Armbruster <armbru@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-Id: <20180202064546.21746-1-kraxel@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-01-25sdl: reorganize -no-frame supportGerd Hoffmann
Drop no_frame flag from sdl_display_init argument list, use a global variable instead. This is temporary until -no-frame support is dropped altogether when we remove sdl1 support. Remove any traces of noframe from sdl2 code. It is just dead code as sdl2 doesn't support the SDL_NOFRAME window flag any more. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20180115154855.30850-3-kraxel@redhat.com
2017-10-17opengl: move shader init from console-gl.c to shader.cGerd Hoffmann
With the upcoming dmabuf support in qemu there will be more users of the shaders than just console-gl.c. So rename ConsoleGLState to QemuGLShader, rename some functions too, move code from console-gl.c to shaders.c. No functional change. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20171010135453.6704-3-kraxel@redhat.com
2017-10-17console: add support for dmabufsGerd Hoffmann
This patch adds support for dma-bufs to the qemu console interfaces. It adds a new "struct QemuDmaBuf" to represent a dmabuf with accociated metatdata (size, format). It adds three functions (and DisplayChangeListenerOps operations) to set a dma-buf as display scanout, as cursor and to release a dmabuf. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20171010135453.6704-2-kraxel@redhat.com
2017-09-29console: purge curses bits from console.hGerd Hoffmann
Handle the translation from vga chars to curses chars in curses_update() instead of console_write_ch(). Purge any curses support bits from ui/console.h include file. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20170927103811.19249-1-kraxel@redhat.com
2017-08-31console: use DIV_ROUND_UPMarc-André Lureau
I used the clang-tidy qemu-round check to generate the fix: https://github.com/elmarco/clang-tools-extra Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <rth@twiddle.net>
2017-05-12opengl: add egl-headless displayGerd Hoffmann
Add egl-headless user interface. It doesn't provide a real user interface, it only provides opengl support using drm render nodes. It will copy back the bits rendered by the guest using virgl back to a DisplaySurface and kick the usual display update code paths, so spice and vnc and screendump can pick it up. Use it this way: qemu -display egl-headless -vnc $display qemu -display egl-headless -spice gl=off,$args Note that you should prefer native spice opengl support (-spice gl=on) if possible because that delivers better performance. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 20170505104101.30589-7-kraxel@redhat.com
2017-03-16cirrus/vnc: zap bitblit support from console code.Gerd Hoffmann
There is a special code path (dpy_gfx_copy) to allow graphic emulation notify user interface code about bitblit operations carryed out by guests. It is supported by cirrus and vnc server. The intended purpose is to optimize display scrolls and just send over the scroll op instead of a full display update. This is rarely used these days though because modern guests simply don't use the cirrus blitter any more. Any linux guest using the cirrus drm driver doesn't. Any windows guest newer than winxp doesn't ship with a cirrus driver any more and thus uses the cirrus as simple framebuffer. So this code tends to bitrot and bugs can go unnoticed for a long time. See for example commit "3e10c3e vnc: fix qemu crash because of SIGSEGV" which fixes a bug lingering in the code for almost a year, added by commit "c7628bf vnc: only alloc server surface with clients connected". Also the vnc server will throttle the frame rate in case it figures the network can't keep up (send buffers are full). This doesn't work with dpy_gfx_copy, for any copy operation sent to the vnc client we have to send all outstanding updates beforehand, otherwise the vnc client might run the client side blit on outdated data and thereby corrupt the display. So this dpy_gfx_copy "optimization" might even make things worse on slow network links. Lets kill it once for all. Oh, and one more reason: Turns out (after writing the patch) we have a security bug in that code path ... Fixes: CVE-2016-9603 Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 1489494419-14340-1-git-send-email-kraxel@redhat.com
2017-02-27console: add dpy_gl_scanout_disableGerd Hoffmann
Helper function (and DisplayChangeListenerOps ptr) to disable scanouts. Replaces using dpy_gl_scanout_texture with 0x0 size and no texture specified. Allows cleanups to make the io and gfx emulation code more readable. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-id: 1487669841-13668-3-git-send-email-kraxel@redhat.com
2017-02-27console: rename dpy_gl_scanout to dpy_gl_scanout_textureGerd Hoffmann
We'll add a variant which accepts dmabufs soon. Change the name so we can easily disturgish the two variants. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-id: 1487669841-13668-2-git-send-email-kraxel@redhat.com
2017-01-27chardev: qom-ifyMarc-André Lureau
Turn Chardev into Object. qemu_chr_alloc() is replaced by the qemu_chardev_new() constructor. It will call qemu_char_open() to open/intialize the chardev with the ChardevCommon *backend settings. The CharDriver::create() callback is turned into a ChardevClass::open() which is called from the newly introduced qemu_chardev_open(). "chardev-gdb" and "chardev-hci" are internal chardev and aren't creatable directly with -chardev. Use a new internal flag to disable them. We may want to use TYPE_USER_CREATABLE interface instead, or perhaps allow -chardev usage. Although in general we keep typename and macros private, unless the type is being used by some other file, in this patch, all types and common helper macros for qemu-char.c are in char.h. This is to help transition now (some types must be declared early, while some aren't shared) and when splitting in several units. This is to be improved later. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-01-10curses: Fix compiler warnings (Mingw-w64 redefinition of macro KEY_EVENT)Stefan Weil
For builds with Mingw-w64 as it is included in Cygwin, there are two header files which define KEY_EVENT with different values. This results in lots of compiler warnings like this one: CC vl.o In file included from /qemu/include/ui/console.h:340:0, from /qemu/vl.c:76: /usr/i686-w64-mingw32/sys-root/mingw/include/curses.h:1522:0: warning: "KEY_EVENT" redefined #define KEY_EVENT 0633 /* We were interrupted by an event */ In file included from /usr/share/mingw-w64/include/windows.h:74:0, from /usr/share/mingw-w64/include/winsock2.h:23, from /qemu/include/sysemu/os-win32.h:29, from /qemu/include/qemu/osdep.h:100, from /qemu/vl.c:24: /usr/share/mingw-w64/include/wincon.h:101:0: note: this is the location of the previous definition #define KEY_EVENT 0x1 QEMU only uses the KEY_EVENT macro from wincon.h. Therefore we can undefine the macro coming from curses.h. The explicit include statement for curses.h in ui/curses.c is not needed and was removed. Those two modifications fix the redefinition warnings. Signed-off-by: Stefan Weil <sw@weilnetz.de> Acked-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Message-id: 20161119185318.10564-1-sw@weilnetz.de Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2017-01-10console: add API to get underlying gui window IDSamuel Thibault
This adds two console functions, qemu_console_set_window_id and qemu_graphic_console_get_window_id, to let graphical backend record the window id in the QemuConsole structure, and let the baum driver read it. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Message-id: 20161221003806.22412-2-samuel.thibault@ens-lyon.org Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2016-09-28console: track gl_block state in QemuConsoleGerd Hoffmann
Keep track of gl_block state (added in bba19b8 console: block rendering until client is done) in QemuConsole and allow to query it. This way we can avoid state inconsistencies in case different code paths make use of this. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-id: 1474617028-3979-2-git-send-email-kraxel@redhat.com
2016-09-15Remove unused function declarationsLadi Prosek
Unused function declarations were found using a simple gcc plugin and manually verified by grepping the sources. Signed-off-by: Ladi Prosek <lprosek@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2016-07-06virgl: pass whole GL scanout dimensionsMarc-André Lureau
Spice client needs the whole GL texture dimension to be able to show a scanout with a monitor offset (different than +0+0). Furthermore, this fixes a crash when calling surface_{width,height}() after dpy_gfx_replace_surface(con, NULL) was called in virgl_cmd_set_scanout() Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-id: 1465911849-30423-4-git-send-email-marcandre.lureau@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2016-06-29vnc: generalize "VNC server running on ..." messagePaolo Bonzini
The message is useful whenever the user specifies "-vnc to=XX". Move it to ui/vnc.c. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-20gtk: Initialization stubsEduardo Habkost
This reduces the number of CONFIG_GTK #ifdefs in vl.c. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2016-05-20cocoa: cocoa_display_init() stubEduardo Habkost
One less #ifdef in vl.c. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2016-05-20sdl: Initialization stubsEduardo Habkost
This reduces the number of CONFIG_SDL #ifdefs in vl.c. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2016-05-20curses: curses_display_init() stubEduardo Habkost
One less #ifdef in vl.c. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2016-05-20vnc: Initialization stubsEduardo Habkost
This reduces the number of CONFIG_VNC #ifdefs in the vl.c code. The only user-visible difference is that this will make QEMU complain about syntax when using "-display vnc" ("VNC requires a display argument vnc=<display>") even if CONFIG_VNC is disabled. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2016-04-11ui/virtio-gpu: add and use qemu_create_displaysurface_pixmanGerd Hoffmann
Add a the new qemu_create_displaysurface_pixman function, to create a DisplaySurface backed by an existing pixman image. In that case there is no need to create a new pixman image pointing to the same backing storage. We can just use the existing image directly. This does not only simplify things a bit, but most importantly it gets the reference counting right, so the backing storage for the pixman image wouldn't be released underneath us. Use new function in virtio-gpu, where using it actually fixes use-after-free crashes. Cc: qemu-stable@nongnu.org Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 1459499240-742-1-git-send-email-kraxel@redhat.com
2016-03-22Use scripts/clean-includes to drop redundant qemu/typedefs.hMarkus Armbruster
Re-run scripts/clean-includes to apply the previous commit's corrections and updates. Besides redundant qemu/typedefs.h, this only finds a redundant config-host.h include in ui/egl-helpers.c. No idea how that escaped the previous runs. Some manual whitespace trimming around dropped includes squashed in. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-01console: add & use qemu_console_lookup_by_device_nameGerd Hoffmann
We have two places needing this, and a third one will come shortly. So factor things out into a helper function to reduce code duplication. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com>
2016-02-23include: Clean up includesPeter Maydell
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. NB: If this commit breaks compilation for your out-of-tree patchseries or fork, then you need to make sure you add #include "qemu/osdep.h" to any new .c files that you have. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com>
2016-02-03Merge remote-tracking branch 'remotes/kraxel/tags/pull-vga-20160203-1' into ↵Peter Maydell
staging virtio-gpu: bugfixes and spice support preparation # gpg: Signature made Wed 03 Feb 2016 09:47:13 GMT using RSA key ID D3E87138 # gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" # gpg: aka "Gerd Hoffmann <gerd@kraxel.org>" # gpg: aka "Gerd Hoffmann (private) <kraxel@gmail.com>" * remotes/kraxel/tags/pull-vga-20160203-1: virtio-gpu: block any rendering until client (ui) is done virtio-gpu: add support to enable/disable command processing virtio-gpu: maintain command queue virtio-gpu: fix memory leak in error path console: block rendering until client is done zap qemu_egl_has_ext in include/ui/egl-helpers.h Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-02-03console: block rendering until client is doneGerd Hoffmann
Allow gl user interfaces to block display device gl rendering. The ui code might want to do that in case it takes a little longer to bring things to screen, for example because we'll hand over a dma-buf to another process (spice will do that). Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
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