test_swangle_utils.cc

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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.
 
#include "flutter/testing/test_swangle_utils.h"
 
#include <EGL/egl.h>
#include <EGL/eglext.h>
 
#include <cstring>
 
#include "flutter/fml/logging.h"
 
namespace flutter::testing {
 
namespace {
 
bool HasExtension(const char* extensions, const char* name) {
  const char* r = strstr(extensions, name);
  auto len = strlen(name);
  // check that the extension name is terminated by space or null terminator
  return r != nullptr && (r[len] == ' ' || r[len] == 0);
}
 
}  // namespace
 
EGLDisplay CreateSwangleDisplay() {
  const char* extensions = ::eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
 
  if (!extensions) {
    FML_LOG(ERROR) << "Could not query EGL extensions.";
    return EGL_NO_DISPLAY;
  }
 
  if (!HasExtension(extensions, "EGL_EXT_platform_base")) {
    FML_LOG(ERROR) << "EGL_EXT_platform_base extension not available";
    return EGL_NO_DISPLAY;
  }
 
  if (!HasExtension(extensions, "EGL_ANGLE_platform_angle_vulkan")) {
    FML_LOG(ERROR) << "EGL_ANGLE_platform_angle_vulkan extension not available";
    return EGL_NO_DISPLAY;
  }
 
  if (!HasExtension(extensions,
                    "EGL_ANGLE_platform_angle_device_type_swiftshader")) {
    FML_LOG(ERROR) << "EGL_ANGLE_platform_angle_device_type_swiftshader "
                      "extension not available";
    return EGL_NO_DISPLAY;
  }
 
  PFNEGLGETPLATFORMDISPLAYEXTPROC egl_get_platform_display_EXT =
      reinterpret_cast<PFNEGLGETPLATFORMDISPLAYEXTPROC>(
          eglGetProcAddress("eglGetPlatformDisplayEXT"));
 
  if (!egl_get_platform_display_EXT) {
    FML_LOG(ERROR) << "eglGetPlatformDisplayEXT not available.";
    return EGL_NO_DISPLAY;
  }
 
  const EGLint display_config[] = {
      EGL_PLATFORM_ANGLE_TYPE_ANGLE,
      EGL_PLATFORM_ANGLE_TYPE_VULKAN_ANGLE,
      EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE,
      EGL_PLATFORM_ANGLE_DEVICE_TYPE_SWIFTSHADER_ANGLE,
      EGL_PLATFORM_ANGLE_NATIVE_PLATFORM_TYPE_ANGLE,
      EGL_PLATFORM_VULKAN_DISPLAY_MODE_HEADLESS_ANGLE,
      EGL_NONE,
  };
 
  return egl_get_platform_display_EXT(
      EGL_PLATFORM_ANGLE_ANGLE,
      reinterpret_cast<EGLNativeDisplayType*>(EGL_DEFAULT_DISPLAY),
      display_config);
}
 
}  // namespace flutter::testing