From 0e0bf8ed47416e812e86679ae86af75606a2d1af Mon Sep 17 00:00:00 2001
From: Matthias Clasen <mclasen@redhat.com>
Date: Fri, 27 Oct 2023 15:37:37 -0400
Subject: [PATCH] gsk: Add a debug flag for graphics offload

Add GSK_DEBUG=offload-disable to disable graphics offload via
attaching of dmabufs to subsurfaces. This is not used anywhere yet.
---
 docs/reference/gtk/running.md | 3 +++
 gsk/gskdebug.c                | 1 +
 gsk/gskdebugprivate.h         | 3 ++-
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/docs/reference/gtk/running.md b/docs/reference/gtk/running.md
index 3eca483bf1..acabf5bda7 100644
--- a/docs/reference/gtk/running.md
+++ b/docs/reference/gtk/running.md
@@ -309,6 +309,9 @@ A number of options affect behavior instead of logging:
 `sync`
 : Sync after each frame
 
+`offload-disable`
+: Disable graphics offload to subsurfaces
+
 `vulkan-staging-image`
 : Use a staging image for Vulkan texture upload
 
diff --git a/gsk/gskdebug.c b/gsk/gskdebug.c
index 252fe17167..e1e6058b1a 100644
--- a/gsk/gskdebug.c
+++ b/gsk/gskdebug.c
@@ -17,6 +17,7 @@ static const GdkDebugKey gsk_debug_keys[] = {
   { "full-redraw", GSK_DEBUG_FULL_REDRAW, "Force full redraws" },
   { "sync", GSK_DEBUG_SYNC, "Sync after each frame" },
   { "staging", GSK_DEBUG_STAGING, "Use a staging image for texture upload (Vulkan only)" },
+  { "offload-disable", GSK_DEBUG_OFFLOAD_DISABLE, "Disable graphics offload" },
 };
 
 static guint gsk_debug_flags;
diff --git a/gsk/gskdebugprivate.h b/gsk/gskdebugprivate.h
index 691deafd89..c742492c74 100644
--- a/gsk/gskdebugprivate.h
+++ b/gsk/gskdebugprivate.h
@@ -19,7 +19,8 @@ typedef enum {
   GSK_DEBUG_GEOMETRY              = 1 <<  9,
   GSK_DEBUG_FULL_REDRAW           = 1 << 10,
   GSK_DEBUG_SYNC                  = 1 << 11,
-  GSK_DEBUG_STAGING               = 1 << 12
+  GSK_DEBUG_STAGING               = 1 << 12,
+  GSK_DEBUG_OFFLOAD_DISABLE       = 1 << 13,
 } GskDebugFlags;
 
 #define GSK_DEBUG_ANY ((1 << 13) - 1)