Add Metal support for macOS (arm64) and iOS

1 files changed, 81 insertions, 0 deletions

diff --git a/drivers/metal/metal_utils.h b/drivers/metal/metal_utils.h
new file mode 100644
index 0000000000..eed1aad89b
--- /dev/null
+++ b/drivers/metal/metal_utils.h
@@ -0,0 +1,81 @@
+/**************************************************************************/
+/*  metal_utils.h                                                         */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifndef METAL_UTILS_H
+#define METAL_UTILS_H
+
+#pragma mark - Boolean flags
+
+namespace flags {
+
+/*! Sets the flags within the value parameter specified by the mask parameter. */
+template <typename Tv, typename Tm>
+void set(Tv &p_value, Tm p_mask) {
+	using T = std::underlying_type_t<Tv>;
+	p_value = static_cast<Tv>(static_cast<T>(p_value) | static_cast<T>(p_mask));
+}
+
+/*! Clears the flags within the value parameter specified by the mask parameter. */
+template <typename Tv, typename Tm>
+void clear(Tv &p_value, Tm p_mask) {
+	using T = std::underlying_type_t<Tv>;
+	p_value = static_cast<Tv>(static_cast<T>(p_value) & ~static_cast<T>(p_mask));
+}
+
+/*! Returns whether the specified value has any of the bits specified in mask set to 1. */
+template <typename Tv, typename Tm>
+static constexpr bool any(Tv p_value, const Tm p_mask) { return ((p_value & p_mask) != 0); }
+
+/*! Returns whether the specified value has all of the bits specified in mask set to 1. */
+template <typename Tv, typename Tm>
+static constexpr bool all(Tv p_value, const Tm p_mask) { return ((p_value & p_mask) == p_mask); }
+
+} //namespace flags
+
+#pragma mark - Alignment and Offsets
+
+static constexpr bool is_power_of_two(uint64_t p_value) {
+	return p_value && ((p_value & (p_value - 1)) == 0);
+}
+
+static constexpr uint64_t round_up_to_alignment(uint64_t p_value, uint64_t p_alignment) {
+	DEV_ASSERT(is_power_of_two(p_alignment));
+
+	if (p_alignment == 0) {
+		return p_value;
+	}
+
+	uint64_t mask = p_alignment - 1;
+	uint64_t aligned_value = (p_value + mask) & ~mask;
+
+	return aligned_value;
+}
+
+#endif // METAL_UTILS_H