wine-staging/patches/winemac.drv-no-flicker-patch/0001-winemac.drv-No-Flicker-patch.patch

From a27e6b54a07eb441b5118a2be445b4a752ecd3b1 Mon Sep 17 00:00:00 2001
From: Ken Thomases <ken@codeweavers.com>
Date: Tue, 22 Jun 2021 07:56:43 +1000
Subject: [PATCH] winemac.drv: No Flicker patch

---
 dlls/winemac.drv/macdrv.h      | 1 +
 dlls/winemac.drv/macdrv_main.c | 4 ++++
 dlls/winemac.drv/opengl.c      | 2 +-
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/dlls/winemac.drv/macdrv.h b/dlls/winemac.drv/macdrv.h
index 2ea6cd638c3..6220a0be801 100644
--- a/dlls/winemac.drv/macdrv.h
+++ b/dlls/winemac.drv/macdrv.h
@@ -42,6 +42,7 @@
 extern BOOL allow_software_rendering DECLSPEC_HIDDEN;
 extern BOOL disable_window_decorations DECLSPEC_HIDDEN;
 extern HMODULE macdrv_module DECLSPEC_HIDDEN;
+extern BOOL force_backing_store DECLSPEC_HIDDEN;
 
 
 extern const char* debugstr_cf(CFTypeRef t) DECLSPEC_HIDDEN;
diff --git a/dlls/winemac.drv/macdrv_main.c b/dlls/winemac.drv/macdrv_main.c
index 4a183747796..e982ad12a13 100644
--- a/dlls/winemac.drv/macdrv_main.c
+++ b/dlls/winemac.drv/macdrv_main.c
@@ -64,6 +64,7 @@ int use_precise_scrolling = TRUE;
 int gl_surface_mode = GL_SURFACE_IN_FRONT_OPAQUE;
 int retina_enabled = FALSE;
 int enable_app_nap = FALSE;
+BOOL force_backing_store = FALSE;
 
 CFDictionaryRef localized_strings;
 
@@ -382,6 +383,9 @@ static void setup_options(void)
     if (!get_config_key(hkey, appkey, "EnableAppNap", buffer, sizeof(buffer)))
         enable_app_nap = IS_OPTION_TRUE(buffer[0]);
 
+    if (!get_config_key(hkey, appkey, "ForceOpenGLBackingStore", buffer, sizeof(buffer)))
+        force_backing_store = IS_OPTION_TRUE(buffer[0]);
+
     /* Don't use appkey.  The DPI and monitor sizes should be consistent for all
        processes in the prefix. */
     if (!get_config_key(hkey, NULL, "RetinaMode", buffer, sizeof(buffer)))
diff --git a/dlls/winemac.drv/opengl.c b/dlls/winemac.drv/opengl.c
index cf58588981f..c50be3e7e70 100644
--- a/dlls/winemac.drv/opengl.c
+++ b/dlls/winemac.drv/opengl.c
@@ -1448,7 +1448,7 @@ static BOOL create_context(struct wgl_context *context, CGLContextObj share, uns
         attribs[n++] = pf->samples;
     }
 
-    if (pf->backing_store)
+    if (force_backing_store || pf->backing_store)
         attribs[n++] = kCGLPFABackingStore;
 
     if (core)
-- 
2.35.1