PPAPI: implement GetSupportedPreviewSizes

ppapi/proxy/camera_capabilities_resource.h

+// Copyright 2014 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_CAMERA_CAPABILITIES_RESOURCE_H_
+#define PPAPI_PROXY_CAMERA_CAPABILITIES_RESOURCE_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "ppapi/proxy/ppapi_proxy_export.h"
+#include "ppapi/shared_impl/resource.h"
+#include "ppapi/thunk/ppb_camera_capabilities_api.h"
+
+namespace ppapi {
+namespace proxy {
+
+class ImageCaptureResource;
+
+class PPAPI_PROXY_EXPORT CameraCapabilitiesResource
+    : public Resource,
+      public thunk::PPB_CameraCapabilities_API {
+ public:
+  CameraCapabilitiesResource(PP_Instance instance);
+
+  virtual ~CameraCapabilitiesResource();
+
+  // Resource overrides:
+  virtual thunk::PPB_CameraCapabilities_API* AsPPB_CameraCapabilities_API()
+      override;
+
+  // PPB_CameraCapabilities_API overrides
+  virtual void GetSupportedPreviewSizes(int32_t* array_size,
+                                        PP_Size** preview_sizes) override;
+  virtual void GetSupportedJpegSizes(int32_t* array_size,
+                                     PP_Size** jpeg_sizes) override;
+
+ private:
+  friend ImageCaptureResource;
+
+  // Methods that must be called at most once at initialization to guarantee the
+  // returned pointers in GetSupported*Sizes() are valid within the lifecycle of
+  // this class.
+  void SetPreviewSizes(const std::vector<PP_Size>& sizes);
+  void SetJpegSizes(const std::vector<PP_Size>& sizes);
+
+  int32_t num_preview_sizes_;
+  scoped_ptr<PP_Size[]> preview_sizes_;
+
+  int32_t num_jpeg_sizes_;
+  scoped_ptr<PP_Size[]> jpeg_sizes_;
+
+  DISALLOW_COPY_AND_ASSIGN(CameraCapabilitiesResource);
+};
+
+}  // namespace proxy
+}  // namespace ppapi
+
+#endif  // PPAPI_PROXY_CAMERA_CAPABILITIES_RESOURCE_H_