From 23d3fc712cdf7fc0a4ff837082de9ba773e8605c Mon Sep 17 00:00:00 2001 From: David Edmundson Date: Wed, 23 Mar 2022 15:35:50 +0000 Subject: Implement fractional_scale_v1 and wp_viewport This allows compositors to hint a non-integer scale to use on a window which we can hook to Qt's existing fractional scaling support. The viewport is used to communicate the relationship between buffer size and logical size to the compositor. It is a non-integer alternative to wl_buffer_scale Change-Id: I1a850f1bcd40e8d04e241e18a538b11f18bc671c Reviewed-by: Qt CI Bot Reviewed-by: David Edmundson --- src/3rdparty/protocol/fractional-scale-v1.xml | 102 ++++++++++++++++++++++++++ src/3rdparty/protocol/qt_attribution.json | 17 +++++ 2 files changed, 119 insertions(+) create mode 100644 src/3rdparty/protocol/fractional-scale-v1.xml (limited to 'src/3rdparty/protocol') diff --git a/src/3rdparty/protocol/fractional-scale-v1.xml b/src/3rdparty/protocol/fractional-scale-v1.xml new file mode 100644 index 000000000..350bfc01e --- /dev/null +++ b/src/3rdparty/protocol/fractional-scale-v1.xml @@ -0,0 +1,102 @@ + + + + Copyright © 2022 Kenny Levinsen + + 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. + + + + This protocol allows a compositor to suggest for surfaces to render at + fractional scales. + + A client can submit scaled content by utilizing wp_viewport. This is done by + creating a wp_viewport object for the surface and setting the destination + rectangle to the surface size before the scale factor is applied. + + The buffer size is calculated by multiplying the surface size by the + intended scale. + + The wl_surface buffer scale should remain set to 1. + + If a surface has a surface-local size of 100 px by 50 px and wishes to + submit buffers with a scale of 1.5, then a buffer of 150px by 75 px should + be used and the wp_viewport destination rectangle should be 100 px by 50 px. + + For toplevel surfaces, the size is rounded halfway away from zero. The + rounding algorithm for subsurface position and size is not defined. + + + + + A global interface for requesting surfaces to use fractional scales. + + + + + Informs the server that the client will not be using this protocol + object anymore. This does not affect any other objects, + wp_fractional_scale_v1 objects included. + + + + + + + + + + Create an add-on object for the the wl_surface to let the compositor + request fractional scales. If the given wl_surface already has a + wp_fractional_scale_v1 object associated, the fractional_scale_exists + protocol error is raised. + + + + + + + + + An additional interface to a wl_surface object which allows the compositor + to inform the client of the preferred scale. + + + + + Destroy the fractional scale object. When this object is destroyed, + preferred_scale events will no longer be sent. + + + + + + Notification of a new preferred scale for this surface that the + compositor suggests that the client should use. + + The sent scale is the numerator of a fraction with a denominator of 120. + + + + + diff --git a/src/3rdparty/protocol/qt_attribution.json b/src/3rdparty/protocol/qt_attribution.json index 7b81d5515..e30cb1b69 100644 --- a/src/3rdparty/protocol/qt_attribution.json +++ b/src/3rdparty/protocol/qt_attribution.json @@ -318,5 +318,22 @@ "License": "MIT License", "LicenseFile": "MIT_LICENSE.txt", "Copyright": "Copyright © 2015-2016 Red Hat Inc." + }, + + { + "Id": "fractional-scale-v1", + "Name": "Wayland Fractional Scale Protocol", + "QDocModule": "qtwaylandcompositor", + "QtUsage": "Used in the Qt Wayland platform plugin", + "Files": "fractional-scale-v1.xml", + + "Description": "Send a preferred scale to different clients", + "Homepage": "https://wayland.freedesktop.org", + "Version": "1", + "DownloadLocation": "https://gitlab.freedesktop.org/wayland/wayland-protocols/-/raw/1.31/unstable/fractional-scale/fractional-scale-v1.xml", + "LicenseId": "MIT", + "License": "MIT License", + "LicenseFile": "MIT_LICENSE.txt", + "Copyright": "Copyright © 2022 Kenny Levinsen" } ] -- cgit v1.2.3