PPAPI: implement GetSupportedPreviewSizes

ppapi/proxy/image_capture_resource.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PPAPI_PROXY_IMAGE_CAPTURE_RESOURCE_H_
+#define PPAPI_PROXY_IMAGE_CAPTURE_RESOURCE_H_
+
+#include "base/basictypes.h"
+#include "ppapi/c/pp_size.h"
+#include "ppapi/proxy/connection.h"
+#include "ppapi/proxy/plugin_resource.h"
+#include "ppapi/proxy/ppapi_proxy_export.h"
+#include "ppapi/shared_impl/resource.h"
+#include "ppapi/thunk/ppb_image_capture_api.h"
+
+namespace ppapi {
+namespace proxy {
+
+class CameraCapabilitiesResource;
+class ImageCaptureConfigResource;
+
+class PPAPI_PROXY_EXPORT ImageCaptureResource
+    : public PluginResource,
+      public thunk::PPB_ImageCapture_API {
+ public:
+  ImageCaptureResource(Connection connection, PP_Instance instance);
+  ~ImageCaptureResource() override;
+
+  // Resource overrides:
+  thunk::PPB_ImageCapture_API* AsPPB_ImageCapture_API() override {
+    return this;
+  }
+
+  // PPB_ImageCapture_API implementation.
+  int32_t Open(PP_Var device_id,
+               const scoped_refptr<TrackedCallback>& callback) override;
+  void Close() override;
+  int32_t GetCameraCapabilities(
+      PP_Resource* capabilities,
+      const scoped_refptr<TrackedCallback>& callback) override;
+
+ private:
+  enum OpenState { BEFORE_OPEN, OPENED, CLOSED };

[dcheng, 2015/02/12 21:47:20]

Prefer enum class.

[Justin Chuang, 2015/02/16 19:15:24]

Done. Thanks. Looks better.

+
+  void OnPluginMsgGetPreviewSizesReply(
+      PP_Resource* capabilities_output,
+      const ResourceMessageReplyParams& params,
+      const std::vector<PP_Size>& preview_sizes);
+  void OnPluginMsgOpenReply(const ResourceMessageReplyParams& params);
+
+  bool is_opened() const { return open_state_ == OPENED; }
+
+  // Holds a reference of the callback so that Close() can cancel it.
+  scoped_refptr<TrackedCallback> open_callback_;
+  OpenState open_state_;
+
+  scoped_refptr<TrackedCallback> get_capabilities_callback_;
+  scoped_refptr<CameraCapabilitiesResource> camera_capabilities_;
+
+  DISALLOW_COPY_AND_ASSIGN(ImageCaptureResource);
+};
+
+}  // namespace proxy
+}  // namespace ppapi
+
+#endif  // PPAPI_PROXY_IMAGE_CAPTURE_RESOURCE_H_