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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.
#import "flutter/shell/platform/darwin/ios/rendering_api_selection.h"
#include <Foundation/Foundation.h>
#include <QuartzCore/CAEAGLLayer.h>
#import <QuartzCore/CAMetalLayer.h>
#if SHELL_ENABLE_METAL
#include <Metal/Metal.h>
#endif // SHELL_ENABLE_METAL
#import <TargetConditionals.h>
#include "flutter/fml/logging.h"
namespace flutter {
#if SHELL_ENABLE_METAL
bool ShouldUseMetalRenderer() {
bool ios_version_supports_metal = false;
if (@available(iOS METAL_IOS_VERSION_BASELINE, *)) {
auto device = MTLCreateSystemDefaultDevice();
ios_version_supports_metal = [device supportsFeatureSet:MTLFeatureSet_iOS_GPUFamily1_v3];
[device release];
}
return ios_version_supports_metal;
}
#endif // SHELL_ENABLE_METAL
IOSRenderingAPI GetRenderingAPIForProcess(bool force_software) {
#if TARGET_OS_SIMULATOR
if (force_software) {
return IOSRenderingAPI::kSoftware;
}
#else
if (force_software) {
FML_LOG(WARNING) << "The --enable-software-rendering is only supported on Simulator targets "
"and will be ignored.";
}
#endif // TARGET_OS_SIMULATOR
#if SHELL_ENABLE_METAL
static bool should_use_metal = ShouldUseMetalRenderer();
if (should_use_metal) {
return IOSRenderingAPI::kMetal;
}
#endif // SHELL_ENABLE_METAL
// When Metal isn't available we use Skia software rendering since it performs
// a little better than emulated OpenGL. Also, omitting an OpenGL backend
// reduces binary footprint.
#if TARGET_OS_SIMULATOR
return IOSRenderingAPI::kSoftware;
#else
FML_CHECK(false) << "Metal may only be unavailable on simulators";
return IOSRenderingAPI::kSoftware;
#endif // TARGET_OS_SIMULATOR
}
Class GetCoreAnimationLayerClassForRenderingAPI(IOSRenderingAPI rendering_api) {
switch (rendering_api) {
case IOSRenderingAPI::kSoftware:
return [CALayer class];
case IOSRenderingAPI::kMetal:
if (@available(iOS METAL_IOS_VERSION_BASELINE, *)) {
return [CAMetalLayer class];
}
FML_CHECK(false) << "Metal availability should already have been checked";
break;
default:
break;
}
FML_CHECK(false) << "Unknown client rendering API";
return [CALayer class];
}
} // namespace flutter