Refactored OpenGL embedder that works on Android, Mac or Linux.

runtime/embedders/openglui/android/android_resource.h

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#ifndef EMBEDDERS_OPENGLUI_ANDROID_ANDROID_RESOURCE_H_
+#define EMBEDDERS_OPENGLUI_ANDROID_ANDROID_RESOURCE_H_
+
+#include <android_native_app_glue.h>
+
+#include "embedders/openglui/common/log.h"
+#include "embedders/openglui/common/resource.h"
+
+class AndroidResource : public Resource {
+  public:
+    AndroidResource(android_app* application, const char* path)
+        : Resource(path),
+          asset_manager_(application->activity->assetManager),
+          asset_(NULL) {
+    }
+
+    int32_t descriptor() {
+      if (Open() == 0) {
+        descriptor_ = AAsset_openFileDescriptor(asset_, &start_, &length_);
+        LOGI("%s has start %d, length %d, fd %d",
+             path_, static_cast<int>(start_), static_cast<int>(length_),
+             descriptor_);
+        return descriptor_;
+      }
+      return -1;
+    }
+
+    off_t length() {
+      if (length_ < 0) {
+        length_ = AAsset_getLength(asset_);
+      }
+      return length_;
+    }
+
+    int32_t Open() {
+      LOGI("Attempting to open asset %s", path_);
+      asset_ = AAssetManager_open(asset_manager_, path_, AASSET_MODE_UNKNOWN);
+      if (asset_ != NULL) {
+        return 0;
+      }
+      LOGE("Could not open asset %s", path_);
+      return -1;
+    }
+
+    void Close() {
+      if (asset_ != NULL) {
+        AAsset_close(asset_);
+        asset_ = NULL;
+      }
+    }
+
+    int32_t Read(void* buffer, size_t count) {
+      size_t actual = AAsset_read(asset_, buffer, count);
+      return (actual == count) ? 0 : -1;
+    }
+
+  private:
+    AAssetManager* asset_manager_;
+    AAsset* asset_;
+};
+
+#endif  // EMBEDDERS_OPENGLUI_ANDROID_ANDROID_RESOURCE_H_
+