Flutter macOS Embedder
FlutterRenderer.mm
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
6 
11 #include "flutter/shell/platform/embedder/embedder.h"
12 
13 #pragma mark - Static callbacks that require the engine.
14 
15 static FlutterMetalTexture OnGetNextDrawable(void* user_data, const FlutterFrameInfo* frameInfo) {
16  NSCAssert(NO, @"The renderer config should not be used to get the next drawable.");
17  return FlutterMetalTexture{};
18 }
19 
20 static bool OnPresentDrawable(void* user_data, const FlutterMetalTexture* texture) {
21  NSCAssert(NO, @"The renderer config should not be used to present drawable.");
22  return false;
23 }
24 
26  int64_t textureIdentifier,
27  size_t width,
28  size_t height,
29  FlutterMetalExternalTexture* metalTexture) {
30  FlutterEngine* engine = (__bridge FlutterEngine*)user_data;
31  return [engine.renderer populateTextureWithIdentifier:textureIdentifier
32  metalTexture:metalTexture];
33 }
34 
35 #pragma mark - FlutterRenderer implementation
36 
37 @implementation FlutterRenderer {
38  FlutterDarwinContextMetalSkia* _darwinMetalContext;
39 }
40 
41 - (instancetype)initWithFlutterEngine:(nonnull FlutterEngine*)flutterEngine {
42  self = [super initWithDelegate:self engine:flutterEngine];
43  if (self) {
44  _device = MTLCreateSystemDefaultDevice();
45  if (!_device) {
46  NSLog(@"Could not acquire Metal device.");
47  return nil;
48  }
49 
50  _commandQueue = [_device newCommandQueue];
51  if (!_commandQueue) {
52  NSLog(@"Could not create Metal command queue.");
53  return nil;
54  }
55 
56  _darwinMetalContext = [[FlutterDarwinContextMetalSkia alloc] initWithMTLDevice:_device
57  commandQueue:_commandQueue];
58  }
59  return self;
60 }
61 
62 - (FlutterRendererConfig)createRendererConfig {
63  FlutterRendererConfig config = {
64  .type = FlutterRendererType::kMetal,
65  .metal = {
66  .struct_size = sizeof(FlutterMetalRendererConfig),
67  .device = (__bridge FlutterMetalDeviceHandle)_device,
68  .present_command_queue = (__bridge FlutterMetalCommandQueueHandle)_commandQueue,
69  .get_next_drawable_callback =
70  reinterpret_cast<FlutterMetalTextureCallback>(OnGetNextDrawable),
71  .present_drawable_callback =
72  reinterpret_cast<FlutterMetalPresentCallback>(OnPresentDrawable),
73  .external_texture_frame_callback =
74  reinterpret_cast<FlutterMetalTextureFrameCallback>(OnAcquireExternalTexture),
75  }};
76  return config;
77 }
78 
79 #pragma mark - Embedder callback implementations.
80 
81 - (BOOL)populateTextureWithIdentifier:(int64_t)textureID
82  metalTexture:(FlutterMetalExternalTexture*)textureOut {
83  FlutterExternalTexture* texture = [self getTextureWithID:textureID];
84  return [texture populateTexture:textureOut];
85 }
86 
87 #pragma mark - FlutterTextureRegistrar methods.
88 
89 - (FlutterExternalTexture*)onRegisterTexture:(id<FlutterTexture>)texture {
90  return [[FlutterExternalTexture alloc] initWithFlutterTexture:texture
91  darwinMetalContext:_darwinMetalContext];
92 }
93 
94 @end
FlutterEngine
Definition: FlutterEngine.h:30
user_data
void * user_data
Definition: texture_registrar_unittests.cc:27
FlutterEngine_Internal.h
FlutterViewEngineProvider.h
FlutterRenderer.h
FlutterExternalTexture.h
FlutterExternalTexture
Definition: FlutterExternalTexture.h:18
OnPresentDrawable
static bool OnPresentDrawable(void *user_data, const FlutterMetalTexture *texture)
Definition: FlutterRenderer.mm:20
FlutterRenderer
Definition: FlutterRenderer.h:18
FlutterViewController_Internal.h
FlutterTexture-p
Definition: FlutterTexture.h:21
OnAcquireExternalTexture
static bool OnAcquireExternalTexture(void *user_data, int64_t textureIdentifier, size_t width, size_t height, FlutterMetalExternalTexture *metalTexture)
Definition: FlutterRenderer.mm:25
-[FlutterExternalTexture populateTexture:]
BOOL populateTexture:(nonnull FlutterMetalExternalTexture *metalTexture)
OnGetNextDrawable
static FlutterMetalTexture OnGetNextDrawable(void *user_data, const FlutterFrameInfo *frameInfo)
Definition: FlutterRenderer.mm:15