PPAPI: implement GetSupportedPreviewSizes

content/renderer/pepper/pepper_image_capture_host.cc

+// 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.
+
+#include "content/renderer/pepper/pepper_image_capture_host.h"
+
+#include "content/renderer/pepper/pepper_platform_image_capture.h"
+#include "content/renderer/pepper/renderer_ppapi_host_impl.h"
+#include "content/renderer/render_frame_impl.h"
+#include "ppapi/host/dispatch_host_message.h"
+#include "ppapi/proxy/ppapi_messages.h"
+
+namespace content {
+
+PepperImageCaptureHost::PepperImageCaptureHost(RendererPpapiHostImpl* host,
+                                               PP_Instance instance,
+                                               PP_Resource resource)
+    : ResourceHost(host->GetPpapiHost(), instance, resource),
+      renderer_ppapi_host_(host) {
+}
+
+PepperImageCaptureHost::~PepperImageCaptureHost() {
+  Close();
+}
+
+bool PepperImageCaptureHost::Init() {
+  return !!renderer_ppapi_host_->GetPluginInstance(pp_instance());
+}
+
+int32_t PepperImageCaptureHost::OnResourceMessageReceived(
+    const IPC::Message& msg,
+    ppapi::host::HostMessageContext* context) {
+  int32_t result = PP_ERROR_FAILED;
+
+  PPAPI_BEGIN_MESSAGE_MAP(PepperImageCaptureHost, msg)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_ImageCapture_Open, OnOpen)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_ImageCapture_Close,
+                                        OnClose)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(
+        PpapiPluginMsg_ImageCapture_GetSupportedPreviewSizes, OnGetPreviewSizes)
+    PPAPI_END_MESSAGE_MAP()
+  return result;
+}
+
+void PepperImageCaptureHost::OnInitialized(bool succeeded) {
+  if (!open_reply_context_.is_valid())
+    return;
+
+  if (succeeded) {
+    open_reply_context_.params.set_result(PP_OK);
+  } else {
+    DetachPlatformImageCapture();
+    open_reply_context_.params.set_result(PP_ERROR_FAILED);
+  }
+
+  host()->SendReply(open_reply_context_,
+                    PpapiPluginMsg_ImageCapture_OpenReply());
+  open_reply_context_ = ppapi::host::ReplyMessageContext();
+}
+
+void PepperImageCaptureHost::OnPlatformPreviewSizesEnumerated(
+    const std::vector<PP_Size>& sizes) {
+  if (!preview_sizes_reply_context_.is_valid())
+    return;
+
+  if (sizes.size() > 0)
+    preview_sizes_reply_context_.params.set_result(PP_OK);
+  else
+    preview_sizes_reply_context_.params.set_result(PP_ERROR_FAILED);
+  host()->SendReply(
+      preview_sizes_reply_context_,
+      PpapiPluginMsg_ImageCapture_GetSupportedPreviewSizesReply(sizes));
+  preview_sizes_reply_context_ = ppapi::host::ReplyMessageContext();
+}
+
+int32_t PepperImageCaptureHost::OnOpen(ppapi::host::HostMessageContext* context,
+                                       const std::string& device_id) {
+  if (open_reply_context_.is_valid())
+    return PP_ERROR_INPROGRESS;
+
+  if (platform_image_capture_.get())
+    return PP_ERROR_FAILED;
+
+  GURL document_url = renderer_ppapi_host_->GetDocumentURL(pp_instance());
+  if (!document_url.is_valid())
+    return PP_ERROR_FAILED;
+
+  platform_image_capture_.reset(new PepperPlatformImageCapture(
+      renderer_ppapi_host_->GetRenderFrameForInstance(pp_instance())
+          ->GetRoutingID(),
+      device_id,
+      document_url,
+      this));
+
+  open_reply_context_ = context->MakeReplyMessageContext();
+
+  return PP_OK_COMPLETIONPENDING;
+}
+
+int32_t PepperImageCaptureHost::OnClose(
+    ppapi::host::HostMessageContext* context) {
+  return Close();
+}
+
+int32_t PepperImageCaptureHost::OnGetPreviewSizes(
+    ppapi::host::HostMessageContext* context) {
+  if (preview_sizes_reply_context_.is_valid())
+    return PP_ERROR_INPROGRESS;
+
+  if (!platform_image_capture_.get())
+    return PP_ERROR_FAILED;
+
+  preview_sizes_reply_context_ = context->MakeReplyMessageContext();
+  platform_image_capture_->GetPreviewSizes();
+
+  return PP_OK_COMPLETIONPENDING;
+}
+
+int32_t PepperImageCaptureHost::Close() {
+  if (!platform_image_capture_.get())
+    return PP_OK;
+
+  // TODO(jchuang): abort pending image capture.
+  DetachPlatformImageCapture();
+  return PP_OK;
+}
+
+void PepperImageCaptureHost::DetachPlatformImageCapture() {
+  if (platform_image_capture_) {
+    platform_image_capture_->DetachEventHandler();
+    platform_image_capture_.reset();
+  }
+}
+
+}  // namespace content