From 50ea41cb04a865392f3cbe358b2eb29c5cb9eeb1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Camilla=20L=C3=B6wy?= <elmindreda@elmindreda.org>
Date: Tue, 14 Jun 2022 18:20:56 +0200
Subject: [PATCH] Wayland: Add support for wl_output::name

We now use wl_output::name as the GLFW monitor name, on compositors that
provide this event.

(cherry picked from commit 209f6cf0935412e067e6595790cf3d3d5866923d)
---
 README.md        |  1 +
 src/wl_monitor.c | 32 ++++++++++++++++++++++++++++++--
 2 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 0ecbcab3..5437853a 100644
--- a/README.md
+++ b/README.md
@@ -139,6 +139,7 @@ information on what to include when reporting a bug.
  - [X11] Bugfix: A malformed response during selection transfer could cause a segfault
  - [X11] Bugfix: Some calls would reset Xlib to the default error handler (#2108)
  - [Wayland] Added support for file path drop events (#2040)
+ - [Wayland] Added support for more human-readable monitor names where available
  - [Wayland] Removed support for the deprecated wl\_shell protocol
  - [Wayland] Bugfix: `glfwSetClipboardString` would fail if set to result of
    `glfwGetClipboardString`
diff --git a/src/wl_monitor.c b/src/wl_monitor.c
index f11fb874..52cab9ad 100644
--- a/src/wl_monitor.c
+++ b/src/wl_monitor.c
@@ -53,7 +53,8 @@ static void outputHandleGeometry(void* userData,
     monitor->widthMM = physicalWidth;
     monitor->heightMM = physicalHeight;
 
-    snprintf(monitor->name, sizeof(monitor->name), "%s %s", make, model);
+    if (strlen(monitor->name) == 0)
+        snprintf(monitor->name, sizeof(monitor->name), "%s %s", make, model);
 }
 
 static void outputHandleMode(void* userData,
@@ -106,12 +107,33 @@ static void outputHandleScale(void* userData,
     monitor->wl.scale = factor;
 }
 
+#ifdef WL_OUTPUT_NAME_SINCE_VERSION
+
+void outputHandleName(void* userData, struct wl_output* wl_output, const char* name)
+{
+    struct _GLFWmonitor* monitor = userData;
+
+    strncpy(monitor->name, name, sizeof(monitor->name) - 1);
+}
+
+void outputHandleDescription(void* userData,
+                             struct wl_output* wl_output,
+                             const char* description)
+{
+}
+
+#endif // WL_OUTPUT_NAME_SINCE_VERSION
+
 static const struct wl_output_listener outputListener =
 {
     outputHandleGeometry,
     outputHandleMode,
     outputHandleDone,
     outputHandleScale,
+#ifdef WL_OUTPUT_NAME_SINCE_VERSION
+    outputHandleName,
+    outputHandleDescription,
+#endif
 };
 
 
@@ -128,10 +150,16 @@ void _glfwAddOutputWayland(uint32_t name, uint32_t version)
         return;
     }
 
+#ifdef WL_OUTPUT_NAME_SINCE_VERSION
+    version = _glfw_min(version, WL_OUTPUT_NAME_SINCE_VERSION);
+#else
+    version = 2;
+#endif
+
     struct wl_output* output = wl_registry_bind(_glfw.wl.registry,
                                                 name,
                                                 &wl_output_interface,
-                                                2);
+                                                version);
     if (!output)
         return;