1 files changed, 37 insertions, 0 deletions
diff --git a/gfx/thebes/gfxMacUtils.cpp b/gfx/thebes/gfxMacUtils.cpp
new file mode 100644
index 0000000000..f52ca0910f
--- /dev/null
+++ b/gfx/thebes/gfxMacUtils.cpp
@@ -0,0 +1,37 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "gfxMacUtils.h"
+#include <CoreVideo/CoreVideo.h>
+
+/* static */ CFStringRef gfxMacUtils::CFStringForTransferFunction(
+    mozilla::gfx::TransferFunction aTransferFunction) {
+#if !defined(MAC_OS_VERSION_10_13) || \
+    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_VERSION_10_13
+  CFStringRef kCVImageBufferTransferFunction_sRGB = CFSTR("IEC_sRGB");
+  CFStringRef kCVImageBufferTransferFunction_SMPTE_ST_2084_PQ =
+      CFSTR("SMPTE_ST_2084_PQ");
+  CFStringRef kCVImageBufferTransferFunction_ITU_R_2100_HLG =
+      CFSTR("ITU_R_2100_HLG");
+#endif
+
+  switch (aTransferFunction) {
+    case mozilla::gfx::TransferFunction::BT709:
+      return kCVImageBufferTransferFunction_ITU_R_709_2;
+
+    case mozilla::gfx::TransferFunction::SRGB:
+      return kCVImageBufferTransferFunction_sRGB;
+
+    case mozilla::gfx::TransferFunction::PQ:
+      return kCVImageBufferTransferFunction_SMPTE_ST_2084_PQ;
+
+    case mozilla::gfx::TransferFunction::HLG:
+      return kCVImageBufferTransferFunction_ITU_R_2100_HLG;
+
+    default:
+      MOZ_ASSERT_UNREACHABLE("Unknown TransferFunction.");
+      return kCVImageBufferTransferFunction_ITU_R_709_2;
+  }
+}