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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#pragma once
#include <QuartzCore/CAMetalLayer.h>
#include "flutter/fml/macros.h"
#include "impeller/renderer/context.h"
#include "impeller/renderer/surface.h"
namespace impeller {
class SurfaceMTL final : public Surface {
public:
#pragma GCC diagnostic push
// Disable the diagnostic for iOS Simulators. Metal without emulation isn't
// available prior to iOS 13 and that's what the simulator headers say when
// support for CAMetalLayer begins. CAMetalLayer is available on iOS 8.0 and
// above which is well below Flutters support level.
#pragma GCC diagnostic ignored "-Wunguarded-availability-new"
//----------------------------------------------------------------------------
/// @brief Wraps the current drawable of the given Metal layer to create
/// a surface Impeller can render to. The surface must be created
/// as late as possible and discarded immediately after rendering
/// to it.
///
/// @param[in] context The context
/// @param[in] layer The layer whose current drawable to wrap to create a
/// surface.
///
/// @return A pointer to the wrapped surface or null.
///
static std::unique_ptr<Surface> WrapCurrentMetalLayerDrawable(
const std::shared_ptr<Context>& context,
CAMetalLayer* layer);
#pragma GCC diagnostic pop
// |Surface|
~SurfaceMTL() override;
private:
id<MTLDrawable> drawable_ = nil;
SurfaceMTL(const RenderTarget& target, id<MTLDrawable> drawable);
// |Surface|
bool Present() const override;
FML_DISALLOW_COPY_AND_ASSIGN(SurfaceMTL);
};
} // namespace impeller