From de62ea96ab29cc6dd4f4e2c322bc092cdd681604 Mon Sep 17 00:00:00 2001
From: Matthias Clasen <mclasen@redhat.com>
Date: Mon, 19 Aug 2024 16:04:15 -0400
Subject: [PATCH] Add GDK_DISABLE=color-mgmt

This flag is meant to turn off color management features of GDK.
If this is set, all surfaces will report sRGB as their preferred
color state.
---
 docs/reference/gtk/running.md | 3 +++
 gdk/gdk.c                     | 1 +
 gdk/gdkdebugprivate.h         | 3 ++-
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/docs/reference/gtk/running.md b/docs/reference/gtk/running.md
index 0141f53156..cf4227eb7d 100644
--- a/docs/reference/gtk/running.md
+++ b/docs/reference/gtk/running.md
@@ -358,6 +358,9 @@ disable certain features.
 `offload`
 : Disable graphics offload to subsurfaces
 
+`color-mgmt`
+: Disable color management
+
 ### `GDK_GL_DISABLE`
 
 This variable can be set to a list of values, which cause GDK to
diff --git a/gdk/gdk.c b/gdk/gdk.c
index 4d0c986838..6003990468 100644
--- a/gdk/gdk.c
+++ b/gdk/gdk.c
@@ -151,6 +151,7 @@ static const GdkDebugKey gdk_feature_keys[] = {
   { "vulkan",     GDK_FEATURE_VULKAN,           "Disable Vulkan support" },
   { "dmabuf",     GDK_FEATURE_DMABUF,           "Disable dmabuf support" },
   { "offload",    GDK_FEATURE_OFFLOAD,          "Disable graphics offload" },
+  { "color-mgmt", GDK_FEATURE_COLOR_MANAGEMENT, "Disable color management" },
 };
 
 
diff --git a/gdk/gdkdebugprivate.h b/gdk/gdkdebugprivate.h
index c46085fa79..277bab74a2 100644
--- a/gdk/gdkdebugprivate.h
+++ b/gdk/gdkdebugprivate.h
@@ -63,9 +63,10 @@ typedef enum {
   GDK_FEATURE_VULKAN           = 1 << 6,
   GDK_FEATURE_DMABUF           = 1 << 7,
   GDK_FEATURE_OFFLOAD          = 1 << 8,
+  GDK_FEATURE_COLOR_MANAGEMENT = 1 << 9,
 } GdkFeatures;
 
-#define GDK_ALL_FEATURES ((1 << 9) - 1)
+#define GDK_ALL_FEATURES ((1 << 10) - 1)
 
 extern guint _gdk_debug_flags;