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{
  "build_systems": [
    {
      "name": "Default",
      "shell_cmd": "et build -c host_debug_unopt_arm64 //flutter/impeller:impeller_unittests && ./impeller_unittests --playground_timeout_ms=10000 --gtest_filter=\"*CanDrawImage*/Vulkan\"",
      "working_dir": "${project_path}/out/host_debug_unopt_arm64",
      "file_regex": "(.*):([\\d]+):([\\d]+):? ?((?:error|fatal error|warning|note|Failure):? ?.*)",
      "shell": true,
    },
  ],

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#include <assert.h>
#include <chrono>
#include <embedder.h>
#include <glfw3.h>
#include <iostream>

static_assert(FLUTTER_ENGINE_VERSION == 1, "");

static const size_t kInitialWindowWidth = 800;

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JPEG
PNG
GIF
Animated GIF
WebP
Animated WebP
BMP
WBMP

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com.adobe.photoshop-image
com.adobe.raw-image
com.apple.atx
com.apple.icns
com.apple.pict
com.canon.cr2-raw-image
com.canon.cr3-raw-image
com.canon.crw-raw-image
com.canon.tif-raw-image
com.compuserve.gif

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BULLETTRAIN_IS_SSH_CLIENT="true"
BULLETTRAIN_CUSTOM_BG="green"
BULLETTRAIN_CUSTOM_MSG="Cloudtop\ Linux"
BULLETTRAIN_CONTEXT_DEFAULT_USER=$USER
BULLETTRAIN_STATUS_EXIT_SHOW=true
BULLETTRAIN_TIME_12HR=true
BULLETTRAIN_EXEC_TIME_ELAPSED=2
BULLETTRAIN_EXEC_TIME_FG=white
BULLETTRAIN_EXEC_TIME_BG=blue
BULLETTRAIN_DIR_EXTENDED=1

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# Flutter (https://flutter.io) Developement Environment for Linux
# ===============================================================
#
# This environment passes all Linux Flutter Doctor checks and is sufficient
# for building Android applications and running Flutter tests.
#
# To build iOS applications, a Mac development environment is necessary.
#

FROM debian:stretch

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import 'package:flutter/services.dart'; // for shell
import 'package:sky_services/flutter/platform/uri_launcher.mojom.dart' as mojo;

static mojo.UriLauncherProxy _initLauncherService() =>
    shell.connectToApplicationService(
      mojo.UriLauncher.serviceName,
      mojo.UriLauncher.connectToService);

static mojo.UriLauncherProxy _launcherService = _initLauncherService();

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  CGImageRef imageRef = CGWindowListCreateImage(CGRectInfinite, kCGWindowListOptionAll, kCGNullWindowID, kCGWindowImageDefault);
  
  CFMutableDataRef dataRef = CFDataCreateMutable(kCFAllocatorDefault, 0);
  
  CGImageDestinationRef dest = CGImageDestinationCreateWithData(dataRef, kUTTypePNG, 1, NULL);
  CGImageDestinationAddImage(dest, imageRef, NULL);
  CGImageDestinationFinalize(dest);
  CFRelease(dest);
  
  CGImageRelease(imageRef);

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1. The texture target needs to be GLES20.GL_TEXTURE_EXTERNAL_OES instead of GL_TEXTURE_2D, e.g. in the glBindTexture calls and glTexParameteri calls.

2. In the fragment shader define a requirement to use the extension:
#extension GL_OES_EGL_image_external : require

3. For the texture sampler used in the fragment shader, use samplerExternalOES instead of sampler2D.

Everything below here is all in the C code, no more Java.

4. In the C code, use glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, eglImage) to specify where the data is, instead of using glTexImage2D family of functions.

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diff --git a/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm b/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm
index bc8f4c457..ee1df602c 100644
--- a/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm
+++ b/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm
@@ -489,6 +489,11 @@ static void sendFakeTouchEvent(FlutterEngine* engine,
   // NotifyCreated/NotifyDestroyed are synchronous and require hops between the UI and raster
   // thread.
   if (appeared) {
+    if ([UIApplication sharedApplication].applicationState != UIApplicationStateActive) {
+      NSLog(@"Attempted to call surface appeared while still in the background. Ignoring.");