Use wlr-export-dmabuf to capture frames

Update README
Create WdHeadForm class
2020-05-10 18:09:22 -04:00 · 2020-05-09 15:42:15 -04:00 · 2020-05-09 13:37:18 -04:00 · 2020-05-08 20:26:33 -04:00 · 2020-05-08 20:21:59 -04:00 · 2020-05-08 20:10:27 -04:00
23 changed files with 1448 additions and 1394 deletions
--- a/.reuse/dep5
+++ b/.reuse/dep5
@ -1,14 +1,14 @@
 Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: wdisplays
 Upstream-Contact: Jason Francis <jason@cycles.network>
-Source: https://wdisplays.cycles.network
+Source: <https://cyclopsian.github.io/wdisplays>

 Files: README.md .gitignore
 Copyright: 2020 Jason Francis <jason@cycles.network>
 License: CC0-1.0

 Files: resources/style.css resources/wdisplays.desktop.in resources/*.ui
-       resources/resources.xml
+       resources/resources.xml.in
 Copyright: 2020 Jason Francis <jason@cycles.network>
 License: GPL-3.0-or-later

--- a/README.md
+++ b/README.md
@ -4,19 +4,34 @@

 wdisplays is a graphical application for configuring displays in Wayland
 compositors. It borrows some code from [kanshi]. It should work in any
-compositor that implements the wlr-output-management-unstable-v1 protocol,
-including [sway]. The goal of this project is to allow precise adjustment of
-display settings in kiosks, digital signage, and other elaborate multi-monitor
-setups.
+compositor that implements the wlr-output-management-unstable-v1 protocol.
+Compositors that are known to support the protocol are [Sway] and [Wayfire].
+The goal of this project is to allow precise adjustment of display settings in
+kiosks, digital signage, and other elaborate multi-monitor setups.

 ![Screenshot](wdisplays.png)

+# Installation
+
+[![Repology][repology-img]][repology-pkg]
+
+Check your distro for a `wdisplays` package. Known distro packages:
+
+- [Alpine](https://pkgs.alpinelinux.org/package/edge/testing/x86_64/wdisplays)
+- [Arch](https://aur.archlinux.org/packages/wdisplays-git/)
+- [Debian](https://packages.debian.org/sid/wdisplays)
+- [Fedora](https://copr.fedorainfracloud.org/coprs/wef/wdisplays/)
+- [FreeBSD](https://svnweb.freebsd.org/ports/head/x11/wdisplays/)
+- [Nix](https://github.com/NixOS/nixpkgs/tree/master/pkgs/tools/graphics/wdisplays)
+- [OpenSUSE](https://build.opensuse.org/package/show/home%3AMWh3/wdisplays)
+
 # Building

 Build requirements are:

 - meson
 - GTK+3
+- libdrm
 - epoxy
 - wayland-client

@ -26,8 +41,6 @@ ninja -C build
 sudo ninja -C build install
 ```

-Binaries are not available. Only building from source is supported.
-
 # Usage

 Displays can be moved around the virtual screen space by clicking and dragging
@ -60,10 +73,19 @@ file. See man `sway-output`. If you want to have multiple configurations
 depending on the monitors connected, you'll need to use an external program
 like [kanshi]. Integration with that and other external daemons is planned.

+### How do I add support to my compositor?
+
+A minimal amount of code (approximately 150-200 LOC) is currently required to
+get support for this in wlroots compositors. See the diff here for a sample
+implementation on top of tinywl: [tinywl-output-management].
+
 [kanshi]: https://github.com/emersion/kanshi
-[sway]: https://github.com/swaywm/sway
+[Sway]: https://swaywm.org
+[Wayfire]: https://wayfire.org
 [ARandR]: https://christian.amsuess.com/tools/arandr/
+[tinywl-output-management]: https://git.sr.ht/~jf/tinywl-output-management/commit/87a45d89ae0e7975e2a59f84e960380dd2f5ac08

 [license-img]:  https://img.shields.io/badge/License-GPL%203.0%20or%20later-blue.svg?logo=gnu
 [license-spdx]: https://spdx.org/licenses/GPL-3.0-or-later.html
-
+[repology-img]: https://repology.org/badge/tiny-repos/wdisplays.svg
+[repology-pkg]: https://repology.org/project/wdisplays/versions
--- a/debian/changelog
+++ b/debian/changelog
@ -1,5 +0,0 @@
-wdisplays (1.0-1) unstable; urgency=medium
-
-  * Initial release
-
- -- Jason Francis <cycl0ps@tuta.io>  Fri, 8 May 2020 20:08:08 -0500
--- a/debian/control
+++ b/debian/control
@ -1,23 +0,0 @@
-Source: wdisplays
-Section: x11
-Priority: optional
-Maintainer: Jason Francis <cycl0ps@tuta.io>
-Build-Depends: debhelper-compat (= 12),
-  meson,
-  libwayland-dev,
-  libgtk-3-dev,
-  libepoxy-dev
-Standards-Version: 4.5.0
-Homepage: https://cyclopsian.github.io/wdisplays
-Vcs-Browser: https://github.com/cyclopsian/wdisplays
-Vcs-Git: https://github.com/cyclopsian/wdisplays.git
-
-Package: wdisplays
-Architecture: any
-Depends: ${shlibs:Depends}, ${misc:Depends}
-Description: GUI display configurator for wlroots compositors
-  wdisplays is a graphical application for configuring displays in Wayland
-  compositors. It works with any compositor that implements the
-  wlr-output-management-unstable-v1 protocol, including sway.  The goal of this
-  project is to allow precise adjustment of display settings in kiosks, digital
-  signage, and other elaborate multi-monitor setups.
--- a/debian/copyright
+++ b/debian/copyright
@ -1,432 +0,0 @@
-Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Upstream-Name: wdisplays
-Upstream-Contact: Jason Francis <cycl0ps@tuta.io>
-Source: <https://cyclopsian.github.io/wdisplays>
-
-Files: *
-Copyright: Jason Francis <cycl0ps@tuta.io>
-License: GPL-3.0-or-later
-
-Files: src/wdisplays.h src/outputs.c
-Copyright: Jason Francis <cycl0ps@tuta.io>
-License: GPL-3.0-or-later and MIT
-Files: debian/*
-Copyright: 2020 Jason Francis <cycl0ps@tuta.io>
-License: GPL-3.0-or-later
-
-Files: README.md .gitignore
-Copyright: 2020 Jason Francis <jason@cycles.network>
-License: CC0-1.0
-
-Files: meson.build */meson.build
-Copyright: Jason Francis <cycl0ps@tuta.io>
-License: CC0-1.0
-
-Files: resources/style.css resources/wdisplays.desktop.in resources/*.ui
-       resources/resources.xml
-Copyright: 2020 Jason Francis <jason@cycles.network>
-License: GPL-3.0-or-later
-
-Files: wdisplays.png resources/wdisplays.svg
-Copyright: 2020 Jason Francis <jason@cycles.network>
-License: CC-BY-SA-4.0
-
-Files: protocol/wlr-layer-shell-unstable-v1.xml
-Copyright: 2017 Drew DeVault
-License: MIT
-
-Files: protocol/wlr-output-management-unstable-v1.xml
-Copyright: 2019 Purism SPC
-License: MIT
-
-Files: protocol/wlr-screencopy-unstable-v1.xml
-Copyright: 2018 Simon Ser
-License: MIT
-
-License: GPL-3.0-or-later
- On Debian systems, the complete text of the GNU General
- Public License version 3 can be found in "/usr/share/common-licenses/GPL-3".
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- On Debian systems the full text of the CC0-1.0 license can be found in
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--- a/debian/rules
+++ b/debian/rules
@ -1,7 +0,0 @@
-#!/usr/bin/make -f
-
-export DEB_BUILD_MAINT_OPTIONS = hardening=+all
-
-%:
-	dh $@
-
--- a/debian/source/format
+++ b/debian/source/format
@ -1 +0,0 @@
-3.0 (quilt)
--- a/debian/wdisplays.docs
+++ b/debian/wdisplays.docs
@ -1 +0,0 @@
-README.md
--- a/meson.build
+++ b/meson.build
@ -3,9 +3,11 @@

 project('network.cycles.wdisplays', 'c', license: 'MIT', version: '1.0')

-conf = configuration_data()
-conf.set('app_id', meson.project_name())
-conf.set('version', meson.project_version())
+conf = configuration_data({
+  'app_id': meson.project_name(),
+  'version': meson.project_version(),
+  'resource_prefix': '/' / '/'.join(meson.project_name().split('.')),
+})

 subdir('protocol')
 subdir('resources')
--- a/protocol/meson.build
+++ b/protocol/meson.build
@ -21,9 +21,11 @@ wayland_scanner_client = generator(

 client_protocols = [
  [wl_protocol_dir, 'unstable/xdg-output/xdg-output-unstable-v1.xml'],
+  [wl_protocol_dir, 'unstable/linux-dmabuf/linux-dmabuf-unstable-v1.xml'],
  [wl_protocol_dir, 'stable/xdg-shell/xdg-shell.xml'],
  ['wlr-output-management-unstable-v1.xml'],
  ['wlr-screencopy-unstable-v1.xml'],
+  ['wlr-export-dmabuf-unstable-v1.xml'],
  ['wlr-layer-shell-unstable-v1.xml']
 ]

--- a/protocol/wlr-export-dmabuf-unstable-v1.xml
+++ b/protocol/wlr-export-dmabuf-unstable-v1.xml
@ -0,0 +1,203 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="wlr_export_dmabuf_unstable_v1">
+  <copyright>
+    Copyright © 2018 Rostislav Pehlivanov
+
+    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.
+  </copyright>
+
+  <description summary="a protocol for low overhead screen content capturing">
+    An interface to capture surfaces in an efficient way by exporting DMA-BUFs.
+
+    Warning! The protocol described in this file is experimental and
+    backward incompatible changes may be made. Backward compatible changes
+    may be added together with the corresponding interface version bump.
+    Backward incompatible changes are done by bumping the version number in
+    the protocol and interface names and resetting the interface version.
+    Once the protocol is to be declared stable, the 'z' prefix and the
+    version number in the protocol and interface names are removed and the
+    interface version number is reset.
+  </description>
+
+  <interface name="zwlr_export_dmabuf_manager_v1" version="1">
+    <description summary="manager to inform clients and begin capturing">
+      This object is a manager with which to start capturing from sources.
+    </description>
+
+    <request name="capture_output">
+      <description summary="capture a frame from an output">
+        Capture the next frame of a an entire output.
+      </description>
+      <arg name="frame" type="new_id" interface="zwlr_export_dmabuf_frame_v1"/>
+      <arg name="overlay_cursor" type="int"
+           summary="include custom client hardware cursor on top of the frame"/>
+      <arg name="output" type="object" interface="wl_output"/>
+    </request>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the manager">
+        All objects created by the manager will still remain valid, until their
+        appropriate destroy request has been called.
+      </description>
+    </request>
+  </interface>
+
+  <interface name="zwlr_export_dmabuf_frame_v1" version="1">
+    <description summary="a DMA-BUF frame">
+      This object represents a single DMA-BUF frame.
+
+      If the capture is successful, the compositor will first send a "frame"
+      event, followed by one or several "object". When the frame is available
+      for readout, the "ready" event is sent.
+
+      If the capture failed, the "cancel" event is sent. This can happen anytime
+      before the "ready" event.
+
+      Once either a "ready" or a "cancel" event is received, the client should
+      destroy the frame. Once an "object" event is received, the client is
+      responsible for closing the associated file descriptor.
+
+      All frames are read-only and may not be written into or altered.
+    </description>
+
+    <enum name="flags">
+      <description summary="frame flags">
+        Special flags that should be respected by the client.
+      </description>
+      <entry name="transient" value="0x1"
+             summary="clients should copy frame before processing"/>
+    </enum>
+
+    <event name="frame">
+      <description summary="a frame description">
+        Main event supplying the client with information about the frame. If the
+        capture didn't fail, this event is always emitted first before any other
+        events.
+
+        This event is followed by a number of "object" as specified by the
+        "num_objects" argument.
+      </description>
+      <arg name="width" type="uint"
+           summary="frame width in pixels"/>
+      <arg name="height" type="uint"
+           summary="frame height in pixels"/>
+      <arg name="offset_x" type="uint"
+           summary="crop offset for the x axis"/>
+      <arg name="offset_y" type="uint"
+           summary="crop offset for the y axis"/>
+      <arg name="buffer_flags" type="uint"
+           summary="flags which indicate properties (invert, interlacing),
+                    has the same values as zwp_linux_buffer_params_v1:flags"/>
+      <arg name="flags" type="uint" enum="flags"
+           summary="indicates special frame features"/>
+      <arg name="format" type="uint"
+           summary="format of the frame (DRM_FORMAT_*)"/>
+      <arg name="mod_high" type="uint"
+           summary="drm format modifier, high"/>
+      <arg name="mod_low" type="uint"
+           summary="drm format modifier, low"/>
+      <arg name="num_objects" type="uint"
+           summary="indicates how many objects (FDs) the frame has (max 4)"/>
+    </event>
+
+    <event name="object">
+      <description summary="an object description">
+        Event which serves to supply the client with the file descriptors
+        containing the data for each object.
+
+        After receiving this event, the client must always close the file
+        descriptor as soon as they're done with it and even if the frame fails.
+      </description>
+      <arg name="index" type="uint"
+           summary="index of the current object"/>
+      <arg name="fd" type="fd"
+           summary="fd of the current object"/>
+      <arg name="size" type="uint"
+           summary="size in bytes for the current object"/>
+      <arg name="offset" type="uint"
+           summary="starting point for the data in the object's fd"/>
+      <arg name="stride" type="uint"
+           summary="line size in bytes"/>
+      <arg name="plane_index" type="uint"
+           summary="index of the the plane the data in the object applies to"/>
+    </event>
+
+    <event name="ready">
+      <description summary="indicates frame is available for reading">
+        This event is sent as soon as the frame is presented, indicating it is
+        available for reading. This event includes the time at which
+        presentation happened at.
+
+        The timestamp is expressed as tv_sec_hi, tv_sec_lo, tv_nsec triples,
+        each component being an unsigned 32-bit value. Whole seconds are in
+        tv_sec which is a 64-bit value combined from tv_sec_hi and tv_sec_lo,
+        and the additional fractional part in tv_nsec as nanoseconds. Hence,
+        for valid timestamps tv_nsec must be in [0, 999999999]. The seconds part
+        may have an arbitrary offset at start.
+
+        After receiving this event, the client should destroy this object.
+      </description>
+      <arg name="tv_sec_hi" type="uint"
+           summary="high 32 bits of the seconds part of the timestamp"/>
+      <arg name="tv_sec_lo" type="uint"
+           summary="low 32 bits of the seconds part of the timestamp"/>
+      <arg name="tv_nsec" type="uint"
+           summary="nanoseconds part of the timestamp"/>
+    </event>
+
+    <enum name="cancel_reason">
+      <description summary="cancel reason">
+        Indicates reason for cancelling the frame.
+      </description>
+      <entry name="temporary" value="0"
+             summary="temporary error, source will produce more frames"/>
+      <entry name="permanent" value="1"
+             summary="fatal error, source will not produce frames"/>
+      <entry name="resizing" value="2"
+             summary="temporary error, source will produce more frames"/>
+    </enum>
+
+    <event name="cancel">
+      <description summary="indicates the frame is no longer valid">
+        If the capture failed or if the frame is no longer valid after the
+        "frame" event has been emitted, this event will be used to inform the
+        client to scrap the frame.
+
+        If the failure is temporary, the client may capture again the same
+        source. If the failure is permanent, any further attempts to capture the
+        same source will fail again.
+
+        After receiving this event, the client should destroy this object.
+      </description>
+      <arg name="reason" type="uint" enum="cancel_reason"
+           summary="indicates a reason for cancelling this frame capture"/>
+    </event>
+
+    <request name="destroy" type="destructor">
+      <description summary="delete this object, used or not">
+        Unreferences the frame. This request must be called as soon as its no
+        longer used.
+
+        It can be called at any time by the client. The client will still have
+        to close any FDs it has been given.
+      </description>
+    </request>
+  </interface>
+</protocol>
--- a/resources/head.ui
+++ b/resources/head.ui
@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- Generated with glade 3.22.0 -->
+<!-- Generated with glade 3.22.2 -->
 <interface>
  <requires lib="gtk+" version="3.22"/>
  <object class="GtkAdjustment" id="height_adjustment">
@ -7,23 +7,6 @@
    <property name="step_increment">1</property>
    <property name="page_increment">10</property>
  </object>
-  <object class="GtkPopover" id="modes">
-    <property name="can_focus">False</property>
-    <child>
-      <object class="GtkBox" id="mode_box">
-        <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <property name="margin_start">10</property>
-        <property name="margin_end">10</property>
-        <property name="margin_top">10</property>
-        <property name="margin_bottom">10</property>
-        <property name="orientation">vertical</property>
-        <child>
-          <placeholder/>
-        </child>
-      </object>
-    </child>
-  </object>
  <object class="GtkAdjustment" id="pos_x_adjustment">
    <property name="upper">16383</property>
    <property name="step_increment">1</property>
@ -50,7 +33,7 @@
    <property name="step_increment">1</property>
    <property name="page_increment">10</property>
  </object>
-  <object class="GtkGrid" id="form">
+  <template class="WdHeadForm" parent="GtkGrid">
    <property name="visible">True</property>
    <property name="can_focus">False</property>
    <property name="margin_start">8</property>
@ -69,7 +52,7 @@
        <property name="halign">start</property>
        <property name="use_underline">True</property>
        <property name="draw_indicator">True</property>
-        <signal name="toggled" handler="enabled" swapped="no"/>
+        <signal name="toggled" handler="enabled_toggled" swapped="no"/>
      </object>
      <packing>
        <property name="left_attach">1</property>
@ -99,7 +82,7 @@
        <property name="adjustment">scale_adjustment</property>
        <property name="digits">2</property>
        <property name="value">1</property>
-        <signal name="change-value" handler="scale" swapped="no"/>
+        <signal name="value-changed" handler="position_spin_changed" swapped="no"/>
      </object>
      <packing>
        <property name="left_attach">1</property>
@ -194,6 +177,7 @@
        <property name="spacing">8</property>
        <child>
          <object class="GtkSpinButton" id="refresh">
+            <property name="name">refresh</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="width_chars">9</property>
@ -202,6 +186,7 @@
            <property name="digits">3</property>
            <property name="numeric">True</property>
            <property name="update_policy">if-valid</property>
+            <signal name="value-changed" handler="mode_spin_changed" swapped="no"/>
          </object>
          <packing>
            <property name="expand">False</property>
@ -245,7 +230,6 @@
        <property name="visible">True</property>
        <property name="can_focus">True</property>
        <property name="receives_default">True</property>
-        <property name="popover">transforms</property>
        <child>
          <placeholder/>
        </child>
@ -277,7 +261,7 @@
        <property name="halign">start</property>
        <property name="use_underline">True</property>
        <property name="draw_indicator">True</property>
-        <signal name="toggled" handler="flipped" swapped="no"/>
+        <signal name="toggled" handler="flipped_toggled" swapped="no"/>
      </object>
      <packing>
        <property name="left_attach">1</property>
@ -299,6 +283,7 @@
            <property name="adjustment">pos_x_adjustment</property>
            <property name="numeric">True</property>
            <property name="update_policy">if-valid</property>
+            <signal name="value-changed" handler="position_spin_changed" swapped="no"/>
          </object>
          <packing>
            <property name="left_attach">0</property>
@ -315,6 +300,7 @@
            <property name="adjustment">pos_y_adjustment</property>
            <property name="numeric">True</property>
            <property name="update_policy">if-valid</property>
+            <signal name="value-changed" handler="position_spin_changed" swapped="no"/>
          </object>
          <packing>
            <property name="left_attach">2</property>
@ -323,6 +309,7 @@
        </child>
        <child>
          <object class="GtkSpinButton" id="width">
+            <property name="name">width</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="width_chars">4</property>
@ -331,6 +318,7 @@
            <property name="adjustment">width_adjustment</property>
            <property name="numeric">True</property>
            <property name="update_policy">if-valid</property>
+            <signal name="value-changed" handler="mode_spin_changed" swapped="no"/>
          </object>
          <packing>
            <property name="left_attach">0</property>
@ -351,6 +339,7 @@
        </child>
        <child>
          <object class="GtkSpinButton" id="height">
+            <property name="name">height</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="width_chars">4</property>
@ -359,6 +348,7 @@
            <property name="adjustment">height_adjustment</property>
            <property name="numeric">True</property>
            <property name="update_policy">if-valid</property>
+            <signal name="value-changed" handler="mode_spin_changed" swapped="no"/>
          </object>
          <packing>
            <property name="left_attach">2</property>
@ -371,9 +361,7 @@
            <property name="can_focus">True</property>
            <property name="receives_default">True</property>
            <property name="tooltip_text" translatable="yes">Select Mode Preset</property>
-            <property name="margin_left">8</property>
            <property name="margin_start">8</property>
-            <property name="popover">modes</property>
            <child>
              <object class="GtkImage">
                <property name="visible">True</property>
@ -406,76 +394,5 @@
    <child>
      <placeholder/>
    </child>
-  </object>
-  <object class="GtkPopover" id="transforms">
-    <property name="can_focus">False</property>
-    <property name="relative_to">rotate_button</property>
-    <child>
-      <object class="GtkBox">
-        <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <property name="margin_start">10</property>
-        <property name="margin_end">10</property>
-        <property name="margin_top">10</property>
-        <property name="margin_bottom">10</property>
-        <property name="orientation">vertical</property>
-        <child>
-          <object class="GtkModelButton" id="rotate_0">
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="receives_default">True</property>
-            <property name="action_name">transform.rotate_0</property>
-            <property name="text" translatable="yes">Don't Rotate</property>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="position">0</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkModelButton" id="rotate_90">
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="receives_default">True</property>
-            <property name="action_name">transform.rotate_90</property>
-            <property name="text" translatable="yes">Rotate 90°</property>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="position">1</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkModelButton" id="rotate_180">
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="receives_default">True</property>
-            <property name="action_name">transform.rotate_180</property>
-            <property name="text" translatable="yes">Rotate 180°</property>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="position">2</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkModelButton" id="rotate_270">
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="receives_default">True</property>
-            <property name="action_name">transform.rotate_270</property>
-            <property name="text" translatable="yes">Rotate 270°</property>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="position">3</property>
-          </packing>
-        </child>
-      </object>
-    </child>
-  </object>
+  </template>
 </interface>
--- a/resources/meson.build
+++ b/resources/meson.build
@ -1,11 +1,17 @@
 # SPDX-FileCopyrightText: 2020 Jason Francis <jason@cycles.network>
 # SPDX-License-Identifier: CC0-1.0

+resources_xml = configure_file(
+  input: 'resources.xml.in',
+  output: 'resources.xml',
+  configuration: conf
+)
+
 gnome = import('gnome')
 resources = gnome.compile_resources(
-  'waydisplay-resources', 'resources.xml',
+  'wdisplays-resources', resources_xml,
  source_dir : '.',
-  c_name : 'waydisplay_resources')
+  c_name : 'wdisplays_resources')

 scour = find_program('scour', required: false)

--- a/resources/resources.xml.in
+++ b/resources/resources.xml.in
@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <gresources>
-  <gresource prefix="/">
+  <gresource prefix="@resource_prefix@">
    <file compressed="true" preprocess="xml-stripblanks">wdisplays.ui</file>
    <file compressed="true" preprocess="xml-stripblanks">head.ui</file>
    <file compressed="true">style.css</file>
--- a/resources/wdisplays.ui
+++ b/resources/wdisplays.ui
@ -11,62 +11,6 @@
    <property name="step_increment">1</property>
    <property name="page_increment">10</property>
  </object>
-  <object class="GtkPopover" id="main_menu">
-    <property name="can_focus">False</property>
-    <child>
-      <object class="GtkBox">
-        <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <property name="margin_start">10</property>
-        <property name="margin_end">10</property>
-        <property name="margin_top">10</property>
-        <property name="margin_bottom">10</property>
-        <property name="orientation">vertical</property>
-        <child>
-          <object class="GtkModelButton">
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="receives_default">True</property>
-            <property name="action_name">app.auto-apply</property>
-            <property name="text" translatable="yes">_Automatically Apply Changes</property>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="position">0</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkModelButton">
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="receives_default">True</property>
-            <property name="action_name">app.capture-screens</property>
-            <property name="text" translatable="yes">Show Screen Contents</property>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="position">1</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkModelButton">
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="receives_default">True</property>
-            <property name="action_name">app.show-overlay</property>
-            <property name="text" translatable="yes">Overlay Screen Names</property>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="position">2</property>
-          </packing>
-        </child>
-      </object>
-    </child>
-  </object>
  <object class="GtkWindow" id="heads_window">
    <property name="can_focus">False</property>
    <property name="title" translatable="yes">wdisplays</property>
@ -171,8 +115,6 @@
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="halign">center</property>
-                        <property name="margin_left">8</property>
-                        <property name="margin_right">8</property>
                        <property name="margin_start">8</property>
                        <property name="margin_end">8</property>
                        <property name="margin_top">8</property>
@ -248,14 +190,14 @@
              <object class="GtkButtonBox" id="zoom_box">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
-                <property name="layout_style">expand</property>
                <child>
                  <object class="GtkButton" id="zoom_out">
                    <property name="visible">True</property>
                    <property name="can_focus">True</property>
                    <property name="receives_default">True</property>
                    <property name="tooltip_text" translatable="yes">Zoom Out</property>
-                    <signal name="clicked" handler="zoom_out" swapped="yes"/>
+                    <property name="action_name">app.zoom-out</property>
+                    <accelerator key="minus" signal="clicked" modifiers="GDK_CONTROL_MASK"/>
                    <child>
                      <object class="GtkImage">
                        <property name="visible">True</property>
@ -263,7 +205,6 @@
                        <property name="icon_name">zoom-out-symbolic</property>
                      </object>
                    </child>
-                    <accelerator key="minus" signal="clicked" modifiers="GDK_CONTROL_MASK"/>
                  </object>
                  <packing>
                    <property name="expand">True</property>
@ -278,7 +219,7 @@
                    <property name="can_focus">True</property>
                    <property name="receives_default">True</property>
                    <property name="tooltip_text" translatable="yes">Zoom Reset</property>
-                    <signal name="clicked" handler="zoom_reset" swapped="yes"/>
+                    <property name="action_name">app.zoom-reset</property>
                    <accelerator key="0" signal="clicked" modifiers="GDK_CONTROL_MASK"/>
                  </object>
                  <packing>
@ -294,7 +235,8 @@
                    <property name="can_focus">True</property>
                    <property name="receives_default">True</property>
                    <property name="tooltip_text" translatable="yes">Zoom In</property>
-                    <signal name="clicked" handler="zoom_in" swapped="yes"/>
+                    <property name="action_name">app.zoom-in</property>
+                    <accelerator key="equal" signal="clicked" modifiers="GDK_CONTROL_MASK"/>
                    <child>
                      <object class="GtkImage">
                        <property name="visible">True</property>
@ -302,7 +244,6 @@
                        <property name="icon_name">zoom-in-symbolic</property>
                      </object>
                    </child>
-                    <accelerator key="equal" signal="clicked" modifiers="GDK_CONTROL_MASK"/>
                  </object>
                  <packing>
                    <property name="expand">True</property>
@ -311,6 +252,9 @@
                    <property name="non_homogeneous">True</property>
                  </packing>
                </child>
+                <style>
+                  <class name="linked"/>
+                </style>
              </object>
            </child>
            <child>
@ -318,7 +262,6 @@
                <property name="visible">True</property>
                <property name="can_focus">True</property>
                <property name="receives_default">True</property>
-                <property name="popover">main_menu</property>
                <child>
                  <object class="GtkImage">
                    <property name="visible">True</property>
@ -355,7 +298,7 @@
                <property name="can_focus">True</property>
                <property name="receives_default">True</property>
                <property name="use_underline">True</property>
-                <signal name="clicked" handler="apply_changes" swapped="no"/>
+                <property name="action_name">app.apply-changes</property>
                <style>
                  <class name="suggested-action"/>
                </style>
@ -371,7 +314,7 @@
                <property name="can_focus">True</property>
                <property name="receives_default">True</property>
                <property name="use_underline">True</property>
-                <signal name="clicked" handler="cancel_changes" swapped="no"/>
+                <property name="action_name">app.cancel-changes</property>
              </object>
              <packing>
                <property name="position">1</property>
--- a/src/config.h.in
+++ b/src/config.h.in
@ -6,5 +6,6 @@

 #define WDISPLAYS_APP_ID "@app_id@"
 #define WDISPLAYS_VERSION "@version@"
+#define WDISPLAYS_RESOURCE_PREFIX "@resource_prefix@"

 #endif
--- a/src/headform.c
+++ b/src/headform.c
@ -0,0 +1,393 @@
+/* SPDX-FileCopyrightText: 2020 Jason Francis <jason@cycles.network>
+ * SPDX-License-Identifier: GPL-3.0-or-later */
+
+#include "headform.h"
+#include "wdisplays.h"
+
+typedef struct _WdHeadFormPrivate {
+  GtkWidget *enabled;
+  GtkWidget *description;
+  GtkWidget *physical_size;
+  GtkWidget *scale;
+  GtkWidget *pos_x;
+  GtkWidget *pos_y;
+  GtkWidget *width;
+  GtkWidget *height;
+  GtkWidget *refresh;
+  GtkWidget *mode_button;
+  GtkWidget *rotate_button;
+  GtkWidget *flipped;
+
+  GAction *mode_action;
+  GAction *rotate_action;
+} WdHeadFormPrivate;
+
+enum {
+  CHANGED,
+  LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL];
+
+G_DEFINE_TYPE_WITH_CODE(WdHeadForm, wd_head_form, GTK_TYPE_GRID,
+    G_ADD_PRIVATE(WdHeadForm))
+
+static const char *HEAD_PREFIX = "head";
+static const char *MODE_PREFIX = "mode";
+static const char *ROTATE_PREFIX = "rotate";
+
+static void head_form_update_sensitivity(WdHeadForm *form) {
+  WdHeadFormPrivate *priv = wd_head_form_get_instance_private(form);
+
+  bool enabled_toggled = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(priv->enabled));
+
+  g_autoptr(GList) children = gtk_container_get_children(GTK_CONTAINER(form));
+  for (GList *child = children; child != NULL; child = child->next) {
+    GtkWidget *widget = GTK_WIDGET(child->data);
+    if (widget != priv->enabled) {
+      gtk_widget_set_sensitive(widget, enabled_toggled);
+    }
+  }
+}
+
+static GVariant *create_mode_variant(int32_t w, int32_t h, int32_t r) {
+  GVariant * const children[] = {
+    g_variant_new_int32(w),
+    g_variant_new_int32(h),
+    g_variant_new_int32(r),
+  };
+  return g_variant_new_tuple(children, G_N_ELEMENTS(children));
+}
+
+struct vid_mode {
+  int32_t width;
+  int32_t height;
+  int32_t refresh;
+};
+
+static void unpack_mode_variant(GVariant *value, struct vid_mode *mode) {
+  g_autoptr(GVariant) width = g_variant_get_child_value(value, 0);
+  mode->width = g_variant_get_int32(width);
+  g_autoptr(GVariant) height = g_variant_get_child_value(value, 1);
+  mode->height = g_variant_get_int32(height);
+  g_autoptr(GVariant) refresh = g_variant_get_child_value(value, 2);
+  mode->refresh = g_variant_get_int32(refresh);
+}
+
+static void enabled_toggled(GtkToggleButton *toggle, gpointer data) {
+  WdHeadForm *form = WD_HEAD_FORM(data);
+  head_form_update_sensitivity(form);
+  g_signal_emit(form, signals[CHANGED], 0, WD_FIELD_ENABLED);
+}
+
+static void mode_spin_changed(GtkSpinButton *spin_button, gpointer data) {
+  WdHeadForm *form = WD_HEAD_FORM(data);
+  WdHeadFormPrivate *priv = wd_head_form_get_instance_private(form);
+  struct vid_mode mode;
+  GVariant *value = g_action_get_state(priv->mode_action);
+  unpack_mode_variant(value, &mode);
+  if (strcmp(gtk_widget_get_name(GTK_WIDGET(spin_button)), "width") == 0) {
+    mode.width = gtk_spin_button_get_value(spin_button);
+  } else if (strcmp(gtk_widget_get_name(GTK_WIDGET(spin_button)), "height") == 0) {
+    mode.height = gtk_spin_button_get_value(spin_button);
+  } else if (strcmp(gtk_widget_get_name(GTK_WIDGET(spin_button)), "refresh") == 0) {
+    mode.refresh = gtk_spin_button_get_value(spin_button) * 1000.;
+  }
+  g_action_activate(priv->mode_action, create_mode_variant(mode.width, mode.height, mode.refresh));
+  g_signal_emit(form, signals[CHANGED], 0, WD_FIELD_MODE);
+}
+
+static void position_spin_changed(GtkSpinButton *spin_button, gpointer data) {
+  WdHeadForm *form = WD_HEAD_FORM(data);
+  g_signal_emit(form, signals[CHANGED], 0, WD_FIELD_POSITION);
+}
+
+static void flipped_toggled(GtkToggleButton *toggle, gpointer data) {
+  WdHeadForm *form = WD_HEAD_FORM(data);
+  g_signal_emit(form, signals[CHANGED], 0, WD_FIELD_TRANSFORM);
+}
+
+static void wd_head_form_class_init(WdHeadFormClass *class) {
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(class);
+
+  signals[CHANGED] = g_signal_new("changed",
+      G_OBJECT_CLASS_TYPE(class),
+      G_SIGNAL_RUN_LAST,
+      G_STRUCT_OFFSET(WdHeadFormClass, changed),
+      NULL, NULL, NULL,
+      G_TYPE_NONE, 1, G_TYPE_INT);
+
+  gtk_widget_class_set_template_from_resource(widget_class,
+     WDISPLAYS_RESOURCE_PREFIX "/head.ui");
+
+  gtk_widget_class_bind_template_callback(widget_class, enabled_toggled);
+  gtk_widget_class_bind_template_callback(widget_class, mode_spin_changed);
+  gtk_widget_class_bind_template_callback(widget_class, position_spin_changed);
+  gtk_widget_class_bind_template_callback(widget_class, flipped_toggled);
+
+  gtk_widget_class_bind_template_child_private(widget_class, WdHeadForm, enabled);
+  gtk_widget_class_bind_template_child_private(widget_class, WdHeadForm, description);
+  gtk_widget_class_bind_template_child_private(widget_class, WdHeadForm, physical_size);
+  gtk_widget_class_bind_template_child_private(widget_class, WdHeadForm, scale);
+  gtk_widget_class_bind_template_child_private(widget_class, WdHeadForm, pos_x);
+  gtk_widget_class_bind_template_child_private(widget_class, WdHeadForm, pos_y);
+  gtk_widget_class_bind_template_child_private(widget_class, WdHeadForm, width);
+  gtk_widget_class_bind_template_child_private(widget_class, WdHeadForm, height);
+  gtk_widget_class_bind_template_child_private(widget_class, WdHeadForm, refresh);
+  gtk_widget_class_bind_template_child_private(widget_class, WdHeadForm, mode_button);
+  gtk_widget_class_bind_template_child_private(widget_class, WdHeadForm, rotate_button);
+  gtk_widget_class_bind_template_child_private(widget_class, WdHeadForm, flipped);
+  gtk_widget_class_set_css_name(widget_class, "wd-head-form");
+}
+
+static int32_t get_rotate_value(enum wl_output_transform transform) {
+  if (transform == WL_OUTPUT_TRANSFORM_90 || transform == WL_OUTPUT_TRANSFORM_FLIPPED_90) {
+    return 90;
+  } else if (transform == WL_OUTPUT_TRANSFORM_180 || transform == WL_OUTPUT_TRANSFORM_FLIPPED_180) {
+    return 180;
+  } else if (transform == WL_OUTPUT_TRANSFORM_270 || transform == WL_OUTPUT_TRANSFORM_FLIPPED_270) {
+    return 270;
+  }
+  return 0;
+}
+
+static void rotate_selected(GSimpleAction *action, GVariant *param, gpointer data) {
+  WdHeadForm *form = data;
+  WdHeadFormPrivate *priv = wd_head_form_get_instance_private(form);
+  GMenuModel *menu = gtk_menu_button_get_menu_model(GTK_MENU_BUTTON(priv->rotate_button));
+  int items = g_menu_model_get_n_items(menu);
+  for (int i = 0; i < items; i++) {
+    g_autoptr(GVariant) target = g_menu_model_get_item_attribute_value(menu, i, G_MENU_ATTRIBUTE_TARGET, NULL);
+    g_autoptr(GVariant) label = g_menu_model_get_item_attribute_value(menu, i, G_MENU_ATTRIBUTE_LABEL, NULL);
+    if (g_variant_get_int32(target) == g_variant_get_int32(param)) {
+      gtk_button_set_label(GTK_BUTTON(priv->rotate_button), g_variant_get_string(label, NULL));
+      break;
+    }
+  }
+  g_simple_action_set_state(action, param);
+  g_signal_emit(form, signals[CHANGED], 0, WD_FIELD_TRANSFORM);
+}
+
+static void mode_selected(GSimpleAction *action, GVariant *param, gpointer data) {
+  WdHeadForm *form = data;
+  WdHeadFormPrivate *priv = wd_head_form_get_instance_private(form);
+  struct vid_mode mode;
+  unpack_mode_variant(param, &mode);
+
+  g_simple_action_set_state(action, param);
+  gtk_spin_button_set_value(GTK_SPIN_BUTTON(priv->width), mode.width);
+  gtk_spin_button_set_value(GTK_SPIN_BUTTON(priv->height), mode.height);
+  gtk_spin_button_set_value(GTK_SPIN_BUTTON(priv->refresh), mode.refresh / 1000.);
+  g_signal_emit(form, signals[CHANGED], 0, WD_FIELD_MODE);
+}
+
+static void wd_head_form_init(WdHeadForm *form) {
+  gtk_widget_init_template(GTK_WIDGET(form));
+  WdHeadFormPrivate *priv = wd_head_form_get_instance_private(form);
+
+  GSimpleActionGroup *head_actions = g_simple_action_group_new();
+  gtk_widget_insert_action_group(priv->mode_button, HEAD_PREFIX, G_ACTION_GROUP(head_actions));
+  gtk_widget_insert_action_group(priv->rotate_button, HEAD_PREFIX, G_ACTION_GROUP(head_actions));
+
+  GMenu *rotate_menu = g_menu_new();
+  g_menu_append(rotate_menu, "Don't Rotate", "head.rotate(0)");
+  g_menu_append(rotate_menu, "Rotate 90°", "head.rotate(90)");
+  g_menu_append(rotate_menu, "Rotate 180°", "head.rotate(180)");
+  g_menu_append(rotate_menu, "Rotate 270°", "head.rotate(270)");
+  gtk_menu_button_set_menu_model(GTK_MENU_BUTTON(priv->rotate_button), G_MENU_MODEL(rotate_menu));
+
+  static const GVariantType * const mode_types[] = {
+    G_VARIANT_TYPE_INT32,
+    G_VARIANT_TYPE_INT32,
+    G_VARIANT_TYPE_INT32
+  };
+  GSimpleAction *action = g_simple_action_new_stateful("mode",
+      g_variant_type_new_tuple(mode_types, G_N_ELEMENTS(mode_types)),
+      create_mode_variant(0, 0, 0));
+  g_action_map_add_action(G_ACTION_MAP(head_actions), G_ACTION(action));
+  g_signal_connect(action, "change-state", G_CALLBACK(mode_selected), form);
+  g_object_unref(action);
+  priv->mode_action = G_ACTION(action);
+
+  action = g_simple_action_new_stateful(ROTATE_PREFIX, G_VARIANT_TYPE_INT32,
+      g_variant_new_int32(0));
+  g_action_map_add_action(G_ACTION_MAP(head_actions), G_ACTION(action));
+  g_signal_connect(action, "change-state", G_CALLBACK(rotate_selected), form);
+  g_object_unref(action);
+  priv->rotate_action = G_ACTION(action);
+
+  g_object_unref(head_actions);
+}
+
+void wd_head_form_update(WdHeadForm *form, const struct wd_head *head,
+    enum wd_head_fields fields) {
+  g_return_if_fail(form);
+  g_return_if_fail(head);
+
+  WdHeadFormPrivate *priv = wd_head_form_get_instance_private(form);
+  if (!fields)
+    return;
+
+  if (fields & WD_FIELD_DESCRIPTION)
+    gtk_label_set_text(GTK_LABEL(priv->description), head->description);
+  if (fields & WD_FIELD_PHYSICAL_SIZE) {
+    g_autofree gchar *physical_str = g_strdup_printf("%dmm × %dmm", head->phys_width, head->phys_height);
+    gtk_label_set_text(GTK_LABEL(priv->physical_size), physical_str);
+  }
+  if (fields & WD_FIELD_ENABLED)
+    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(priv->enabled), head->enabled);
+  if (fields & WD_FIELD_SCALE)
+    gtk_spin_button_set_value(GTK_SPIN_BUTTON(priv->scale), head->scale);
+  if (fields & WD_FIELD_POSITION) {
+    gtk_spin_button_set_value(GTK_SPIN_BUTTON(priv->pos_x), head->x);
+    gtk_spin_button_set_value(GTK_SPIN_BUTTON(priv->pos_y), head->y);
+  }
+
+  if (fields & WD_FIELD_MODE) {
+    GMenu *mode_menu = g_menu_new();
+    struct wd_mode *mode;
+    g_autofree gchar *action = g_strdup_printf("%s.%s", HEAD_PREFIX, MODE_PREFIX);
+    wl_list_for_each(mode, &head->modes, link) {
+      g_autofree gchar *name = g_strdup_printf("%d×%d@%0.3fHz", mode->width, mode->height, mode->refresh / 1000.);
+      GMenuItem *item = g_menu_item_new(name, action);
+      g_menu_item_set_attribute_value(item, G_MENU_ATTRIBUTE_TARGET,
+          create_mode_variant(mode->width, mode->height, mode->refresh));
+      g_menu_append_item(mode_menu, item);
+    }
+    gtk_menu_button_set_menu_model(GTK_MENU_BUTTON(priv->mode_button), G_MENU_MODEL(mode_menu));
+    // Mode entries
+    int w = head->custom_mode.width;
+    int h = head->custom_mode.height;
+    int r = head->custom_mode.refresh;
+    if (head->enabled && head->mode != NULL) {
+      w = head->mode->width;
+      h = head->mode->height;
+      r = head->mode->refresh;
+    } else if (!head->enabled && w == 0 && h == 0) {
+      struct wd_mode *mode;
+      wl_list_for_each(mode, &head->modes, link) {
+        if (mode->preferred) {
+          w = mode->width;
+          h = mode->height;
+          r = mode->refresh;
+          break;
+        }
+      }
+    }
+
+    g_action_change_state(priv->mode_action, create_mode_variant(w, h, r));
+  }
+
+  if (fields & WD_FIELD_TRANSFORM) {
+    int active_rotate = get_rotate_value(head->transform);
+    g_action_change_state(priv->rotate_action, g_variant_new_int32(active_rotate));
+
+    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(priv->flipped),
+        head->transform == WL_OUTPUT_TRANSFORM_FLIPPED
+        || head->transform == WL_OUTPUT_TRANSFORM_FLIPPED_90
+        || head->transform == WL_OUTPUT_TRANSFORM_FLIPPED_180
+        || head->transform == WL_OUTPUT_TRANSFORM_FLIPPED_270);
+  }
+
+  // Sync state
+  if (fields & WD_FIELD_ENABLED) {
+    head_form_update_sensitivity(form);
+  }
+  g_signal_emit(form, signals[CHANGED], 0);
+}
+
+GtkWidget *wd_head_form_new(void) {
+  return gtk_widget_new(WD_TYPE_HEAD_FORM, NULL);
+}
+
+gboolean wd_head_form_get_enabled(WdHeadForm *form) {
+  WdHeadFormPrivate *priv = wd_head_form_get_instance_private(form);
+  return gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(priv->enabled));
+}
+
+gboolean wd_head_form_has_changes(WdHeadForm *form, const struct wd_head *head) {
+  g_return_val_if_fail(form, FALSE);
+
+  WdHeadFormPrivate *priv = wd_head_form_get_instance_private(form);
+  if (head->enabled != gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(priv->enabled))) {
+    return TRUE;
+  }
+  double old_scale = round(head->scale * 100.) / 100.;
+  double new_scale = round(gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->scale)) * 100.) / 100.;
+  if (old_scale != new_scale) {
+    return TRUE;
+  }
+  if (head->x != gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->pos_x))) {
+    return TRUE;
+  }
+  if (head->y != gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->pos_y))) {
+    return TRUE;
+  }
+  int w = head->mode != NULL ? head->mode->width : head->custom_mode.width;
+  if (w != gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->width))) {
+    return TRUE;
+  }
+  int h = head->mode != NULL ? head->mode->height : head->custom_mode.height;
+  if (h != gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->height))) {
+    return TRUE;
+  }
+  int r = head->mode != NULL ? head->mode->refresh : head->custom_mode.refresh;
+  if (r / 1000. != gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->refresh))) {
+    return TRUE;
+  }
+  if (g_variant_get_int32(g_action_get_state(priv->rotate_action)) != get_rotate_value(head->transform)) {
+    return TRUE;
+  }
+  bool flipped = head->transform == WL_OUTPUT_TRANSFORM_FLIPPED
+    || head->transform == WL_OUTPUT_TRANSFORM_FLIPPED_90
+    || head->transform == WL_OUTPUT_TRANSFORM_FLIPPED_180
+    || head->transform == WL_OUTPUT_TRANSFORM_FLIPPED_270;
+  if (flipped != gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(priv->flipped))) {
+    return TRUE;
+  }
+  return FALSE;
+}
+
+void wd_head_form_fill_config(WdHeadForm *form, struct wd_head_config *output) {
+  g_return_if_fail(form);
+  g_return_if_fail(output);
+
+  WdHeadFormPrivate *priv = wd_head_form_get_instance_private(form);
+  output->enabled = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(priv->enabled));
+  output->scale = gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->scale));
+  output->x = gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->pos_x));
+  output->y = gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->pos_y));
+  output->width = gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->width));
+  output->height = gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->height));
+  output->refresh = gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->refresh)) * 1000.;
+  int32_t rotate = g_variant_get_int32(g_action_get_state(priv->rotate_action));
+  gboolean flipped = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(priv->flipped));
+  switch (rotate) {
+    case 0: output->transform = flipped ? WL_OUTPUT_TRANSFORM_FLIPPED : WL_OUTPUT_TRANSFORM_NORMAL; break;
+    case 90: output->transform = flipped ? WL_OUTPUT_TRANSFORM_FLIPPED_90 : WL_OUTPUT_TRANSFORM_90; break;
+    case 180: output->transform = flipped ? WL_OUTPUT_TRANSFORM_FLIPPED_180 : WL_OUTPUT_TRANSFORM_180; break;
+    case 270: output->transform = flipped ? WL_OUTPUT_TRANSFORM_FLIPPED_270 : WL_OUTPUT_TRANSFORM_270; break;
+  }
+}
+
+void wd_head_form_get_dimensions(WdHeadForm *form, WdHeadDimensions *dimensions) {
+  g_return_if_fail(form);
+  g_return_if_fail(dimensions);
+
+  WdHeadFormPrivate *priv = wd_head_form_get_instance_private(form);
+
+  dimensions->x = gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->pos_x));
+  dimensions->y = gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->pos_y));
+  dimensions->w = gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->width));
+  dimensions->h = gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->height));
+  dimensions->scale = gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->scale));
+  dimensions->rotation_id = g_variant_get_int32(g_action_get_state(priv->rotate_action)) / 90;
+  dimensions->flipped = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(priv->flipped));
+}
+
+void wd_head_form_set_position(WdHeadForm *form, double x, double y) {
+  g_return_if_fail(form);
+  WdHeadFormPrivate *priv = wd_head_form_get_instance_private(form);
+  gtk_spin_button_set_value(GTK_SPIN_BUTTON(priv->pos_x), x);
+  gtk_spin_button_set_value(GTK_SPIN_BUTTON(priv->pos_y), y);
+}
--- a/src/headform.h
+++ b/src/headform.h
@ -0,0 +1,59 @@
+/* SPDX-FileCopyrightText: 2020 Jason Francis <jason@cycles.network>
+ * SPDX-License-Identifier: GPL-3.0-or-later */
+
+#ifndef WDISPLAY_HEADFORM_H
+#define WDISPLAY_HEADFORM_H
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+enum wd_head_fields {
+  WD_FIELD_NAME           = 1 << 0,
+  WD_FIELD_ENABLED        = 1 << 1,
+  WD_FIELD_DESCRIPTION    = 1 << 2,
+  WD_FIELD_PHYSICAL_SIZE  = 1 << 3,
+  WD_FIELD_SCALE          = 1 << 4,
+  WD_FIELD_POSITION       = 1 << 5,
+  WD_FIELD_MODE           = 1 << 6,
+  WD_FIELD_TRANSFORM      = 1 << 7,
+  WD_FIELDS_ALL           = (1 << 8) - 1
+};
+
+#define WD_TYPE_HEAD_FORM (wd_head_form_get_type())
+G_DECLARE_DERIVABLE_TYPE(
+    WdHeadForm, wd_head_form, WD, HEAD_FORM, GtkGrid)
+
+struct _WdHeadFormClass {
+  GtkGridClass parent_class;
+
+  void (*changed)(WdHeadForm *form, enum wd_head_fields fields);
+};
+
+struct wd_head;
+struct wd_head_config;
+
+typedef struct _WdHeadDimensions {
+  gdouble x;
+  gdouble y;
+  gdouble w;
+  gdouble h;
+  gdouble scale;
+  int rotation_id;
+  gboolean flipped;
+} WdHeadDimensions;
+
+GtkWidget *wd_head_form_new(void);
+
+gboolean wd_head_form_get_enabled(WdHeadForm *form);
+gboolean wd_head_form_has_changes(WdHeadForm *form, const struct wd_head *head);
+void wd_head_form_update(WdHeadForm *form, const struct wd_head *head,
+    enum wd_head_fields fields);
+void wd_head_form_fill_config(WdHeadForm *form, struct wd_head_config *output);
+void wd_head_form_get_dimensions(WdHeadForm *form, WdHeadDimensions *dimensions);
+void wd_head_form_set_position(WdHeadForm *form, double x, double y);
+
+G_END_DECLS
+
+#endif
+
--- a/src/main.c
+++ b/src/main.c
--- a/src/meson.build
+++ b/src/meson.build
@ -4,10 +4,11 @@
 cc = meson.get_compiler('c')
 m_dep = cc.find_library('m', required : false)
 rt_dep = cc.find_library('rt', required : false)
-gdk = dependency('gdk-3.0')
-gtk = dependency('gtk+-3.0')
+gdk = dependency('gdk-3.0', version: '>= 3.24')
+gtk = dependency('gtk+-3.0', version: '>= 3.24')
 assert(gdk.get_pkgconfig_variable('targets').split().contains('wayland'), 'Wayland GDK backend not present')
 epoxy = dependency('epoxy')
+libdrm = dependency('libdrm')

 configure_file(input: 'config.h.in', output: 'config.h', configuration: conf)

@ -15,10 +16,11 @@ executable(
  'wdisplays',
  [
    'main.c',
-    'outputs.c',
-    'render.c',
    'glviewport.c',
+    'headform.c',
+    'outputs.c',
    'overlay.c',
+    'render.c',
    resources,
  ],
  dependencies : [
@ -27,6 +29,7 @@ executable(
    wayland_client,
    client_protos,
    epoxy,
+    libdrm,
    gtk
  ],
  install: true
--- a/src/outputs.c
+++ b/src/outputs.c
@ -25,6 +25,8 @@

 #include "wlr-output-management-unstable-v1-client-protocol.h"
 #include "xdg-output-unstable-v1-client-protocol.h"
+#include "linux-dmabuf-unstable-v1-client-protocol.h"
+#include "wlr-export-dmabuf-unstable-v1-client-protocol.h"
 #include "wlr-screencopy-unstable-v1-client-protocol.h"
 #include "wlr-layer-shell-unstable-v1-client-protocol.h"

@ -143,15 +145,18 @@ void wd_apply_state(struct wd_state *state, struct wl_list *new_outputs,

 static void wd_frame_destroy(struct wd_frame *frame) {
  if (frame->pixels != NULL)
-    munmap(frame->pixels, frame->height * frame->stride);
+    munmap(frame->pixels, frame->height * frame->strides[0]);
  if (frame->buffer != NULL)
    wl_buffer_destroy(frame->buffer);
  if (frame->pool != NULL)
    wl_shm_pool_destroy(frame->pool);
-  if (frame->capture_fd != -1)
-    close(frame->capture_fd);
-  if (frame->wlr_frame != NULL)
-    zwlr_screencopy_frame_v1_destroy(frame->wlr_frame);
+  for (int i = 0; i < frame->n_planes; i++)
+    if (frame->fds[i])
+      close(frame->fds[i]);
+  if (frame->copy_frame != NULL)
+    zwlr_screencopy_frame_v1_destroy(frame->copy_frame);
+  if (frame->export_frame != NULL)
+    zwlr_export_dmabuf_frame_v1_destroy(frame->export_frame);

  wl_list_remove(&frame->link);
  free(frame);
@ -189,6 +194,112 @@ static int create_shm_file(size_t size, const char *fmt, ...) {
  return fd;
 }

+static void make_frame_current(struct wd_frame *frame,
+    uint32_t tv_sec_hi, uint32_t tv_sec_lo, uint32_t tv_nsec) {
+  uint64_t tv_sec = (uint64_t) tv_sec_hi << 32 | tv_sec_lo;
+  frame->tick = (tv_sec * 1000000) + (tv_nsec / 1000);
+
+  struct wd_frame *frame_iter, *frame_tmp;
+  wl_list_for_each_safe(frame_iter, frame_tmp, &frame->output->frames, link) {
+    if (frame != frame_iter) {
+      wd_frame_destroy(frame_iter);
+    }
+  }
+}
+
+#define WD_FRAME_COPY 0x100
+
+static void export_frame(void *data,
+    struct zwlr_export_dmabuf_frame_v1 *wlr_frame,
+    uint32_t width, uint32_t height, uint32_t offset_x, uint32_t offset_y,
+    uint32_t buffer_flags, uint32_t flags, uint32_t format,
+    uint32_t mod_high, uint32_t mod_low, uint32_t num_objects) {
+  struct wd_frame *frame = data;
+  frame->width = width;
+  frame->height = height;
+  frame->format = format;
+  frame->flags = buffer_flags;
+/*
+  if (flags & ZWLR_EXPORT_DMABUF_FRAME_V1_FLAGS_TRANSIENT) {
+    frame->flags |= WD_FRAME_COPY;
+  }
+*/
+  frame->modifier = ((uint64_t) mod_high << 32) | mod_low;
+  frame->n_planes = num_objects;
+}
+
+static void export_object(void *data,
+    struct zwlr_export_dmabuf_frame_v1 *wlr_frame,
+    uint32_t index, int32_t fd, uint32_t size, uint32_t offset,
+    uint32_t stride, uint32_t plane_index) {
+  struct wd_frame *frame = data;
+
+  if (frame->flags & WD_FRAME_COPY) {
+    void *src = NULL;
+    void *dest = NULL;
+    int wfd = create_shm_file(size, "/wd-%s", frame->output->name);
+    if (wfd == -1) {
+      goto done;
+    }
+    src = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, offset);
+    if (src == MAP_FAILED) {
+      fprintf(stderr, "mmap: %d: %s\n", fd, strerror(errno));
+      close(wfd);
+      wfd = -1;
+      goto done;
+    }
+    dest = mmap(NULL, size - offset, PROT_READ | PROT_WRITE,
+        MAP_PRIVATE, wfd, 0);
+    if (dest == MAP_FAILED) {
+      fprintf(stderr, "mmap: %d: %s\n", wfd, strerror(errno));
+      close(wfd);
+      wfd = -1;
+      goto done;
+    }
+    memcpy(dest, src, size - offset);
+done:
+    if (src)
+      munmap(src, size);
+    if (dest)
+      munmap(dest, size - offset);
+    close(fd);
+    frame->fds[plane_index] = wfd;
+  } else {
+    frame->fds[plane_index] = fd;
+    frame->offsets[plane_index] = offset;
+  }
+  frame->strides[plane_index] = stride;
+}
+
+static void export_ready(void *data,
+    struct zwlr_export_dmabuf_frame_v1 *wlr_frame,
+    uint32_t tv_sec_hi, uint32_t tv_sec_lo, uint32_t tv_nsec) {
+  struct wd_frame *frame = data;
+
+  make_frame_current(frame, tv_sec_hi, tv_sec_lo, tv_nsec);
+
+  if (frame->flags & WD_FRAME_COPY) {
+    frame->flags ^= WD_FRAME_COPY;
+    zwlr_export_dmabuf_frame_v1_destroy(frame->export_frame);
+    frame->export_frame = NULL;
+  }
+  frame->ready = true;
+}
+
+static void export_cancel(void *data,
+    struct zwlr_export_dmabuf_frame_v1 *wlr_frame,
+    uint32_t reason) {
+  struct wd_frame *frame = data;
+  wd_frame_destroy(frame);
+}
+
+static struct zwlr_export_dmabuf_frame_v1_listener export_listener = {
+  .frame = export_frame,
+  .object = export_object,
+  .ready = export_ready,
+  .cancel = export_cancel
+};
+
 static void capture_buffer(void *data,
    struct zwlr_screencopy_frame_v1 *copy_frame,
    uint32_t format, uint32_t width, uint32_t height, uint32_t stride) {
@ -199,22 +310,23 @@ static void capture_buffer(void *data,
    goto err;
  }

+  frame->n_planes = 1;
  size_t size = stride * height;
-  frame->capture_fd = create_shm_file(size, "/wd-%s", frame->output->name);
-  if (frame->capture_fd == -1) {
+  frame->fds[0] = create_shm_file(size, "/wd-%s", frame->output->name);
+  if (frame->fds[0] == -1) {
    goto err;
  }

  frame->pool = wl_shm_create_pool(frame->output->state->shm,
-      frame->capture_fd, size);
+      frame->fds[0], size);
  frame->buffer = wl_shm_pool_create_buffer(frame->pool, 0,
      width, height, stride, format);
  zwlr_screencopy_frame_v1_copy(copy_frame, frame->buffer);
-  frame->stride = stride;
+  frame->offsets[0] = 0;
+  frame->strides[0] = stride;
  frame->width = width;
  frame->height = height;
-  frame->swap_rgb = format == WL_SHM_FORMAT_ABGR8888
-    || format == WL_SHM_FORMAT_XBGR8888;
+  frame->format = format;

  return;
 err:
@ -225,7 +337,9 @@ static void capture_flags(void *data,
    struct zwlr_screencopy_frame_v1 *wlr_frame,
    uint32_t flags) {
  struct wd_frame *frame = data;
-  frame->y_invert = !!(flags & ZWLR_SCREENCOPY_FRAME_V1_FLAGS_Y_INVERT);
+  if (flags & ZWLR_SCREENCOPY_FRAME_V1_FLAGS_Y_INVERT) {
+    frame->flags |= ZWP_LINUX_BUFFER_PARAMS_V1_FLAGS_Y_INVERT;
+  }
 }

 static void capture_ready(void *data,
@ -233,27 +347,20 @@ static void capture_ready(void *data,
    uint32_t tv_sec_hi, uint32_t tv_sec_lo, uint32_t tv_nsec) {
  struct wd_frame *frame = data;

-  frame->pixels = mmap(NULL, frame->stride * frame->height,
-      PROT_READ, MAP_SHARED, frame->capture_fd, 0);
+  frame->pixels = mmap(NULL, frame->strides[0] * frame->height,
+      PROT_READ, MAP_SHARED, frame->fds[0], 0);
  if (frame->pixels == MAP_FAILED) {
    frame->pixels = NULL;
-    fprintf(stderr, "mmap: %d: %s\n", frame->capture_fd, strerror(errno));
+    fprintf(stderr, "mmap: %d: %s\n", frame->fds[0], strerror(errno));
    wd_frame_destroy(frame);
    return;
-  } else {
-    uint64_t tv_sec = (uint64_t) tv_sec_hi << 32 | tv_sec_lo;
-    frame->tick = (tv_sec * 1000000) + (tv_nsec / 1000);
  }
  
-  zwlr_screencopy_frame_v1_destroy(frame->wlr_frame);
-  frame->wlr_frame = NULL;
+  make_frame_current(frame, tv_sec_hi, tv_sec_lo, tv_nsec);

-  struct wd_frame *frame_iter, *frame_tmp;
-  wl_list_for_each_safe(frame_iter, frame_tmp, &frame->output->frames, link) {
-    if (frame != frame_iter) {
-      wd_frame_destroy(frame_iter);
-    }
-  }
+  zwlr_screencopy_frame_v1_destroy(frame->copy_frame);
+  frame->copy_frame = NULL;
+  frame->ready = true;
 }

 static void capture_failed(void *data,
@ -274,7 +381,7 @@ static bool has_pending_captures(struct wd_state *state) {
  wl_list_for_each(output, &state->outputs, link) {
    struct wd_frame *frame;
    wl_list_for_each(frame, &output->frames, link) {
-      if (frame->pixels == NULL) {
+      if (!frame->ready) {
        return true;
      }
    }
@ -283,8 +390,8 @@ static bool has_pending_captures(struct wd_state *state) {
 }

 void wd_capture_frame(struct wd_state *state) {
-  if (state->copy_manager == NULL || has_pending_captures(state)
-      || !state->capture) {
+  if ((state->export_manager == NULL && state->copy_manager == NULL)
+       || has_pending_captures(state) || !state->capture) {
    return;
  }

@ -292,12 +399,21 @@ void wd_capture_frame(struct wd_state *state) {
  wl_list_for_each(output, &state->outputs, link) {
    struct wd_frame *frame = calloc(1, sizeof(*frame));
    frame->output = output;
-    frame->capture_fd = -1;
-    frame->wlr_frame =
-      zwlr_screencopy_manager_v1_capture_output(state->copy_manager, 1,
-        output->wl_output);
-    zwlr_screencopy_frame_v1_add_listener(frame->wlr_frame, &capture_listener,
-        frame);
+    for (int i = 0; i < WD_MAX_PLANES; i++)
+      frame->fds[i] = -1;
+    if (state->export_manager) {
+      frame->export_frame =
+        zwlr_export_dmabuf_manager_v1_capture_output(state->export_manager, 1,
+          output->wl_output);
+      zwlr_export_dmabuf_frame_v1_add_listener(frame->export_frame,
+          &export_listener, frame);
+    } else if (state->copy_manager) {
+      frame->copy_frame =
+        zwlr_screencopy_manager_v1_capture_output(state->copy_manager, 1,
+          output->wl_output);
+      zwlr_screencopy_frame_v1_add_listener(frame->copy_frame,
+          &capture_listener, frame);
+    }
    wl_list_insert(&output->frames, &frame->link);
  }
 }
@ -540,6 +656,9 @@ static void registry_handle_global(void *data, struct wl_registry *registry,
  } else if (strcmp(interface, zxdg_output_manager_v1_interface.name) == 0) {
    state->xdg_output_manager = wl_registry_bind(registry, name,
        &zxdg_output_manager_v1_interface, version);
+  } else if(strcmp(interface, zwlr_export_dmabuf_manager_v1_interface.name) == 0) {
+    state->export_manager = wl_registry_bind(registry, name,
+        &zwlr_export_dmabuf_manager_v1_interface, version);
  } else if(strcmp(interface, zwlr_screencopy_manager_v1_interface.name) == 0) {
    state->copy_manager = wl_registry_bind(registry, name,
        &zwlr_screencopy_manager_v1_interface, version);
@ -689,6 +808,9 @@ void wd_state_destroy(struct wd_state *state) {
  if (state->layer_shell != NULL) {
    zwlr_layer_shell_v1_destroy(state->layer_shell);
  }
+  if (state->export_manager != NULL) {
+    zwlr_export_dmabuf_manager_v1_destroy(state->export_manager);
+  }
  if (state->copy_manager != NULL) {
    zwlr_screencopy_manager_v1_destroy(state->copy_manager);
  }
--- a/src/render.c
+++ b/src/render.c
@ -1,13 +1,24 @@
 /* SPDX-FileCopyrightText: 2020 Jason Francis <jason@cycles.network>
 * SPDX-License-Identifier: GPL-3.0-or-later */
+/* SPDX-FileCopyrightText: 2018 Simon Ser
+ * SPDX-FileCopyrightText: 2018 Guido Günther
+ * SPDX-License-Identifier: MIT */
+/* Parts of this file are taken from swaywm/wlroots:
+ * https://github.com/swaywm/wlroots/blob/e97c2c3639119831ced4f6b9f704b096c2075973/render/egl.c
+ */

 #include "wdisplays.h"

+#define WL_EGL_PLATFORM 1
+
+#include <assert.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <math.h>
-#include <epoxy/gl.h>
 #include <wayland-util.h>
+#include <epoxy/gl.h>
+#include <epoxy/egl.h>
+#include <drm_fourcc.h>

 #define BT_UV_VERT_SIZE (2 + 2)
 #define BT_UV_QUAD_SIZE (6 * BT_UV_VERT_SIZE)
@ -29,22 +40,25 @@ enum gl_buffers {
  NUM_BUFFERS
 };

+struct wd_gl_texture_program {
+  GLuint id;
+  GLuint position_attribute;
+  GLuint uv_attribute;
+  GLuint screen_size_uniform;
+  GLuint texture_uniform;
+  GLuint color_transform_uniform;
+  GLuint color_add_uniform;
+};
+
 struct wd_gl_data {
+  EGLDisplay display;
+
  GLuint color_program;
-  GLuint color_vertex_shader;
-  GLuint color_fragment_shader;
  GLuint color_position_attribute;
  GLuint color_color_attribute;
  GLuint color_screen_size_uniform;

-  GLuint texture_program;
-  GLuint texture_vertex_shader;
-  GLuint texture_fragment_shader;
-  GLuint texture_position_attribute;
-  GLuint texture_uv_attribute;
-  GLuint texture_screen_size_uniform;
-  GLuint texture_texture_uniform;
-  GLuint texture_color_transform_uniform;
+  struct wd_gl_texture_program rgb;

  GLuint buffers[NUM_BUFFERS];

@ -90,8 +104,9 @@ precision mediump float;\n\
 varying vec2 uv_out;\n\
 uniform sampler2D texture;\n\
 uniform mat4 color_transform;\n\
+uniform vec4 color_add;\n\
 void main(void) {\n\
-  gl_FragColor = texture2D(texture, uv_out) * color_transform;\n\
+  gl_FragColor = texture2D(texture, uv_out) * color_transform + color_add;\n\
 }";

 static GLuint gl_make_shader(GLenum type, const char *src) {
@ -142,18 +157,62 @@ static void gl_link_and_validate(GLint program) {
  }
 }

-struct wd_gl_data *wd_gl_setup(void) {
+static void setup_texture_program(struct wd_gl_texture_program *prog,
+  const char *fragment_src) {
+  prog->id = glCreateProgram();
+
+  GLuint vertex_shader = gl_make_shader(GL_VERTEX_SHADER,
+      texture_vertex_shader_src);
+  glAttachShader(prog->id, vertex_shader);
+  GLuint fragment_shader = gl_make_shader(GL_FRAGMENT_SHADER, fragment_src);
+  glAttachShader(prog->id, fragment_shader);
+  gl_link_and_validate(prog->id);
+
+  glDeleteShader(fragment_shader);
+  glDeleteShader(vertex_shader);
+
+  prog->position_attribute = glGetAttribLocation(prog->id, "position");
+  prog->uv_attribute = glGetAttribLocation(prog->id, "uv");
+  prog->screen_size_uniform = glGetUniformLocation(prog->id, "screen_size");
+  prog->texture_uniform = glGetUniformLocation(prog->id, "texture");
+  prog->color_transform_uniform = glGetUniformLocation(prog->id,
+      "color_transform");
+  prog->color_add_uniform = glGetUniformLocation(prog->id, "color_add");
+}
+
+#define assert_ext(_name, _expr) do { \
+  static bool _tested_##_name = false; \
+  if (!_tested_##_name) { \
+    _tested_##_name = true; \
+    if (!(_expr)) \
+      wd_fatal_error(1, "Extension " #_name " not found\n"); \
+  } \
+} while (0)
+
+#define assert_gl_ext(_name) \
+  assert_ext(_name, epoxy_has_gl_extension(#_name))
+
+#define assert_egl_ext(_res, _name) \
+  assert_ext(_name, epoxy_has_egl_extension((_res)->display, #_name))
+   
+struct wd_gl_data *wd_gl_setup(struct wl_display *display) {
  struct wd_gl_data *res = calloc(1, sizeof(struct wd_gl_data));
+  res->display = eglGetDisplay(display);
  res->color_program = glCreateProgram();

-  res->color_vertex_shader = gl_make_shader(GL_VERTEX_SHADER,
+  GLuint vertex_shader = gl_make_shader(GL_VERTEX_SHADER,
      color_vertex_shader_src);
-  glAttachShader(res->color_program, res->color_vertex_shader);
-  res->color_fragment_shader = gl_make_shader(GL_FRAGMENT_SHADER,
+  glAttachShader(res->color_program, vertex_shader);
+  GLuint fragment_shader = gl_make_shader(GL_FRAGMENT_SHADER,
      color_fragment_shader_src);
-  glAttachShader(res->color_program, res->color_fragment_shader);
+  glAttachShader(res->color_program, fragment_shader);
  gl_link_and_validate(res->color_program);

+  glDeleteShader(fragment_shader);
+  glDeleteShader(vertex_shader);
+
+  setup_texture_program(&res->rgb, texture_fragment_shader_src);
+
  res->color_position_attribute = glGetAttribLocation(res->color_program,
      "position");
  res->color_color_attribute = glGetAttribLocation(res->color_program,
@ -161,27 +220,6 @@ struct wd_gl_data *wd_gl_setup(void) {
  res->color_screen_size_uniform = glGetUniformLocation(res->color_program,
      "screen_size");

-  res->texture_program = glCreateProgram();
-
-  res->texture_vertex_shader = gl_make_shader(GL_VERTEX_SHADER,
-      texture_vertex_shader_src);
-  glAttachShader(res->texture_program, res->texture_vertex_shader);
-  res->texture_fragment_shader = gl_make_shader(GL_FRAGMENT_SHADER,
-      texture_fragment_shader_src);
-  glAttachShader(res->texture_program, res->texture_fragment_shader);
-  gl_link_and_validate(res->texture_program);
-
-  res->texture_position_attribute = glGetAttribLocation(res->texture_program,
-      "position");
-  res->texture_uv_attribute = glGetAttribLocation(res->texture_program,
-      "uv");
-  res->texture_screen_size_uniform = glGetUniformLocation(res->texture_program,
-      "screen_size");
-  res->texture_texture_uniform = glGetUniformLocation(res->texture_program,
-      "texture");
-  res->texture_color_transform_uniform = glGetUniformLocation(
-      res->texture_program, "color_transform");
-
  glGenBuffers(NUM_BUFFERS, res->buffers);
  glBindBuffer(GL_ARRAY_BUFFER, res->buffers[TEXTURE_BUFFER]);
  glBufferData(GL_ARRAY_BUFFER, BT_UV_MAX * sizeof(float),
@ -198,6 +236,83 @@ struct wd_gl_data *wd_gl_setup(void) {
  return res;
 }

+EGLImageKHR wd_gl_create_dmabuf_texture(struct wd_gl_data *res,
+    struct wd_frame *frame) {
+  assert(!frame->pixels);
+  assert_egl_ext(res, EGL_KHR_image_base);
+  assert_egl_ext(res, EGL_EXT_image_dma_buf_import);
+
+  bool has_modifier = frame->modifier != DRM_FORMAT_MOD_INVALID
+    && frame->modifier != DRM_FORMAT_MOD_LINEAR;
+
+  if (has_modifier) {
+    assert_egl_ext(res, EGL_EXT_image_dma_buf_import_modifiers);
+  }
+
+  unsigned int atti = 0;
+  EGLint attribs[50];
+  attribs[atti++] = EGL_WIDTH;
+  attribs[atti++] = frame->width;
+  attribs[atti++] = EGL_HEIGHT;
+  attribs[atti++] = frame->height;
+  attribs[atti++] = EGL_LINUX_DRM_FOURCC_EXT;
+  attribs[atti++] = frame->format;
+
+  struct {
+    EGLint fd;
+    EGLint offset;
+    EGLint pitch;
+    EGLint mod_lo;
+    EGLint mod_hi;
+  } attr_names[WD_MAX_PLANES] = {
+    {
+      EGL_DMA_BUF_PLANE0_FD_EXT,
+      EGL_DMA_BUF_PLANE0_OFFSET_EXT,
+      EGL_DMA_BUF_PLANE0_PITCH_EXT,
+      EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT,
+      EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT
+    }, {
+      EGL_DMA_BUF_PLANE1_FD_EXT,
+      EGL_DMA_BUF_PLANE1_OFFSET_EXT,
+      EGL_DMA_BUF_PLANE1_PITCH_EXT,
+      EGL_DMA_BUF_PLANE1_MODIFIER_LO_EXT,
+      EGL_DMA_BUF_PLANE1_MODIFIER_HI_EXT
+    }, {
+      EGL_DMA_BUF_PLANE2_FD_EXT,
+      EGL_DMA_BUF_PLANE2_OFFSET_EXT,
+      EGL_DMA_BUF_PLANE2_PITCH_EXT,
+      EGL_DMA_BUF_PLANE2_MODIFIER_LO_EXT,
+      EGL_DMA_BUF_PLANE2_MODIFIER_HI_EXT
+    }, {
+      EGL_DMA_BUF_PLANE3_FD_EXT,
+      EGL_DMA_BUF_PLANE3_OFFSET_EXT,
+      EGL_DMA_BUF_PLANE3_PITCH_EXT,
+      EGL_DMA_BUF_PLANE3_MODIFIER_LO_EXT,
+      EGL_DMA_BUF_PLANE3_MODIFIER_HI_EXT
+    }
+  };
+
+  for (int i=0; i < frame->n_planes; i++) {
+    attribs[atti++] = attr_names[i].fd;
+    attribs[atti++] = frame->fds[i];
+    attribs[atti++] = attr_names[i].offset;
+    attribs[atti++] = frame->offsets[i];
+    attribs[atti++] = attr_names[i].pitch;
+    attribs[atti++] = frame->strides[i];
+    if (has_modifier) {
+      attribs[atti++] = attr_names[i].mod_lo;
+      attribs[atti++] = frame->modifier & 0xFFFFFFFF;
+      attribs[atti++] = attr_names[i].mod_hi;
+      attribs[atti++] = frame->modifier >> 32;
+    }
+  }
+  attribs[atti++] = EGL_NONE;
+  assert(atti < sizeof(attribs)/sizeof(attribs[0]));
+
+  return eglCreateImageKHR(res->display, EGL_NO_CONTEXT,
+      EGL_LINUX_DMA_BUF_EXT, NULL, attribs);
+}
+
 static const GLfloat TRANSFORM_RGB[16] = {
  1, 0, 0, 0,
  0, 1, 0, 0,
@ -320,34 +435,42 @@ void wd_gl_render(struct wd_gl_data *res, struct wd_render_data *info,
  float screen_size[2] = { info->viewport_width, info->viewport_height };

  if (tri_verts > 0) {
-    glUseProgram(res->texture_program);
+    glUseProgram(res->rgb.id);
    glBindBuffer(GL_ARRAY_BUFFER, res->buffers[TEXTURE_BUFFER]);
    glBufferSubData(GL_ARRAY_BUFFER, 0,
        tri_verts * BT_UV_VERT_SIZE * sizeof(float), res->verts);
-    glEnableVertexAttribArray(res->texture_position_attribute);
-    glEnableVertexAttribArray(res->texture_uv_attribute);
-    glVertexAttribPointer(res->texture_position_attribute,
+    glEnableVertexAttribArray(res->rgb.position_attribute);
+    glEnableVertexAttribArray(res->rgb.uv_attribute);
+    glVertexAttribPointer(res->rgb.position_attribute,
        2, GL_FLOAT, GL_FALSE,
        BT_UV_VERT_SIZE * sizeof(float), (void *) (0 * sizeof(float)));
-    glVertexAttribPointer(res->texture_uv_attribute, 2, GL_FLOAT, GL_FALSE,
+    glVertexAttribPointer(res->rgb.uv_attribute, 2, GL_FLOAT, GL_FALSE,
        BT_UV_VERT_SIZE * sizeof(float), (void *) (2 * sizeof(float)));
-    glUniform2fv(res->texture_screen_size_uniform, 1, screen_size);
-    glUniform1i(res->texture_texture_uniform, 0);
+    glUniform2fv(res->rgb.screen_size_uniform, 1, screen_size);
+    glUniform1i(res->rgb.texture_uniform, 0);
    glActiveTexture(GL_TEXTURE0);

    i = 0;
    wl_list_for_each_reverse(head, &info->heads, link) {
      glBindTexture(GL_TEXTURE_2D, res->textures[i]);
      if (head->updated_at == tick) {
-        glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, head->tex_stride / 4);
-        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
-            head->tex_width, head->tex_height,
-            0, GL_RGBA, GL_UNSIGNED_BYTE, head->pixels);
-        glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 0);
+        if (head->image) {
+          assert_gl_ext(GL_OES_EGL_image);
+          glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, head->image);
+        } else if (head->pixels) {
+          assert_gl_ext(GL_EXT_unpack_subimage);
+          glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, head->tex_stride / 4);
+          glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
+              head->tex_width, head->tex_height,
+              0, GL_RGBA, GL_UNSIGNED_BYTE, head->pixels);
+          glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, 0);
+        }
        glGenerateMipmap(GL_TEXTURE_2D);
      }
-      glUniformMatrix4fv(res->texture_color_transform_uniform, 1, GL_FALSE,
+      glUniformMatrix4fv(res->rgb.color_transform_uniform, 1, GL_FALSE,
        head->swap_rgb ? TRANSFORM_RGB : TRANSFORM_BGR);
+      float color_add[4] = { 0.f, 0.f, 0.f, head->has_alpha ? 0.f : 1.f };
+      glUniform4fv(res->rgb.color_add_uniform, 1, color_add);
      glDrawArrays(GL_TRIANGLES, i * 6, 6);
      i++;
      if (i >= HEADS_MAX)
@ -514,13 +637,9 @@ void wd_gl_render(struct wd_gl_data *res, struct wd_render_data *info,

 void wd_gl_cleanup(struct wd_gl_data *res) {
  glDeleteBuffers(NUM_BUFFERS, res->buffers);
-  glDeleteShader(res->texture_fragment_shader);
-  glDeleteShader(res->texture_vertex_shader);
-  glDeleteProgram(res->texture_program);
-
-  glDeleteShader(res->color_fragment_shader);
-  glDeleteShader(res->color_vertex_shader);
  glDeleteProgram(res->color_program);

+  glDeleteProgram(res->rgb.id);
+
  free(res);
 }
--- a/src/wdisplays.h
+++ b/src/wdisplays.h
@ -20,11 +20,15 @@
 #include <stdbool.h>
 #include <wayland-client.h>

+#include "headform.h"
+
 struct zxdg_output_v1;
 struct zxdg_output_manager_v1;
 struct zwlr_output_mode_v1;
 struct zwlr_output_head_v1;
 struct zwlr_output_manager_v1;
+struct zwlr_export_dmabuf_manager_v1;
+struct zwlr_export_dmabuf_frame_v1;
 struct zwlr_screencopy_manager_v1;
 struct zwlr_screencopy_frame_v1;
 struct zwlr_layer_shell_v1;
@ -39,17 +43,7 @@ typedef struct _GdkCursor GdkCursor;
 struct _cairo_surface;
 typedef struct _cairo_surface cairo_surface_t;

-enum wd_head_fields {
-  WD_FIELD_NAME           = 1 << 0,
-  WD_FIELD_ENABLED        = 1 << 1,
-  WD_FIELD_DESCRIPTION    = 1 << 2,
-  WD_FIELD_PHYSICAL_SIZE  = 1 << 3,
-  WD_FIELD_SCALE          = 1 << 4,
-  WD_FIELD_POSITION       = 1 << 5,
-  WD_FIELD_MODE           = 1 << 6,
-  WD_FIELD_TRANSFORM      = 1 << 7,
-  WD_FIELDS_ALL           = (1 << 8) - 1
-};
+typedef void *EGLImageKHR;

 struct wd_output {
  struct wd_state *state;
@ -63,21 +57,30 @@ struct wd_output {
  struct zwlr_layer_surface_v1 *overlay_layer_surface;
 };

+#define WD_MAX_PLANES 4
+
 struct wd_frame {
  struct wd_output *output;
-  struct zwlr_screencopy_frame_v1 *wlr_frame;
+  struct zwlr_export_dmabuf_frame_v1 *export_frame;
+  struct zwlr_screencopy_frame_v1 *copy_frame;

  struct wl_list link;
-  int capture_fd;
-  unsigned stride;
+
  unsigned width;
  unsigned height;
+  uint64_t tick;
+
+  uint32_t format;
+  uint32_t flags;
+  uint64_t modifier;
+  uint32_t n_planes;
+  int fds[WD_MAX_PLANES];
+  uint32_t offsets[WD_MAX_PLANES];
+  uint32_t strides[WD_MAX_PLANES];
  struct wl_shm_pool *pool;
  struct wl_buffer *buffer;
  uint8_t *pixels;
-  uint64_t tick;
-  bool y_invert;
-  bool swap_rgb;
+  bool ready;
 };

 struct wd_head_config {
@ -151,15 +154,17 @@ struct wd_render_head_data {
  struct wd_render_head_flags active;

  uint8_t *pixels;
+  EGLImageKHR image;
  unsigned tex_stride;
  unsigned tex_width;
  unsigned tex_height;

-  bool preview;
-  bool y_invert;
-  bool swap_rgb;
-  bool hovered;
-  bool clicked;
+  uint32_t preview : 1,
+           y_invert : 1,
+           swap_rgb : 1,
+           has_alpha : 1,
+           hovered : 1,
+           clicked : 1;
 };

 struct wd_render_data {
@ -176,6 +181,7 @@ struct wd_render_data {
  int x_origin;
  int y_origin;
  uint64_t updated_at;
+  bool external_images;

  struct wl_list heads;
 };
@ -188,6 +194,7 @@ struct wd_point {
 struct wd_state {
  struct zxdg_output_manager_v1 *xdg_output_manager;
  struct zwlr_output_manager_v1 *output_manager;
+  struct zwlr_export_dmabuf_manager_v1 *export_manager;
  struct zwlr_screencopy_manager_v1 *copy_manager;
  struct zwlr_layer_shell_v1 *layer_shell;
  struct wl_shm *shm;
@ -205,10 +212,10 @@ struct wd_state {
  unsigned int reset_idle;

  struct wd_render_head_data *clicked;
-  /* top left, bottom right */
-  struct wd_point click_offset;
+  struct wd_point drag_start;
+  struct wd_point head_drag_start; /* 0-1 range in head rect */
  bool panning;
-  struct wd_point pan_last;
+  struct wd_point pan_start;

  GtkWidget *main_box;
  GtkWidget *header_stack;
@ -301,7 +308,7 @@ void wd_ui_reset_heads(struct wd_state *state);
 * Updates the UI form for a single head. Useful for when the compositor
 * notifies us of updated configuration caused by another program.
 */
-void wd_ui_reset_head(const struct wd_head *head, unsigned int fields);
+void wd_ui_reset_head(const struct wd_head *head, enum wd_head_fields fields);

 /*
 * Updates the stack and all forms to the last known server state.
@ -321,8 +328,14 @@ void wd_ui_show_error(struct wd_state *state, const char *message);
 /*
 * Compiles the GL shaders.
 */
-struct wd_gl_data *wd_gl_setup(void);
+struct wd_gl_data *wd_gl_setup(struct wl_display *display);

+/*
+ * Creates an EGLImage from a given output frame. The frame must have a dmabuf
+ * received from a wlr_export_dmabuf_frame.
+ */
+EGLImageKHR wd_gl_create_dmabuf_texture(struct wd_gl_data *res,
+    struct wd_frame *frame);
 /*
 * Renders the GL scene.
 */
Author	SHA1	Message	Date
Jason Francis	3ac3f6cab2	Use wlr-export-dmabuf to capture frames	2020-05-10 18:09:22 -04:00
Jason Francis	dd7e1e22ee	Update README	2020-05-09 15:42:15 -04:00
Jason Francis	0ed52013dd	Create WdHeadForm class	2020-05-09 13:37:18 -04:00
Jason Francis	f3f2b9e9e2	Backport GTK4 changes Includes refactoring to use GMenuModel and GtkEventController	2020-05-08 20:26:33 -04:00
Jason Francis	71ce9741d1	Add package links	2020-05-08 20:21:59 -04:00
Jason Francis	1a58f8e15c	Update application ID and readme	2020-05-08 20:10:27 -04:00
Jason Francis	69564522bc	Relicense to GPL3+, add REUSE compliance https://reuse.software/spec/	2020-05-08 20:10:27 -04:00