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// Copyright (c) 2011 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_PPB_FONT_PROXY_H_
#define PPAPI_PROXY_PPB_FONT_PROXY_H_
#include "base/callback.h"
#include "base/synchronization/waitable_event.h"
#include "ppapi/proxy/interface_proxy.h"
#include "ppapi/shared_impl/function_group_base.h"
#include "ppapi/shared_impl/host_resource.h"
#include "ppapi/shared_impl/resource.h"
#include "ppapi/shared_impl/webkit_forwarding.h"
#include "ppapi/thunk/ppb_font_api.h"
struct PPB_Font_Dev;
namespace ppapi {
namespace proxy {
class SerializedVarReturnValue;
class PPB_Font_Proxy : public InterfaceProxy,
public ppapi::thunk::PPB_Font_FunctionAPI {
public:
PPB_Font_Proxy(Dispatcher* dispatcher);
virtual ~PPB_Font_Proxy();
// FunctionGroupBase overrides.
virtual ppapi::thunk::PPB_Font_FunctionAPI* AsPPB_Font_FunctionAPI() OVERRIDE;
// PPB_Font_FunctionAPI implementation.
virtual PP_Var GetFontFamilies(PP_Instance instance) OVERRIDE;
// InterfaceProxy implementation.
virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
static const InterfaceID kInterfaceID = INTERFACE_ID_PPB_FONT;
private:
DISALLOW_COPY_AND_ASSIGN(PPB_Font_Proxy);
};
class Font : public ppapi::Resource,
public ppapi::thunk::PPB_Font_API {
public:
// Note that there isn't a "real" resource in the renderer backing a font,
// it lives entirely in the plugin process. So the resource ID in the host
// resource should be 0. However, various code assumes the instance in the
// host resource is valid (this is how resources are associated with
// instances), so that should be set.
Font(const ppapi::HostResource& resource, const PP_FontDescription_Dev& desc);
virtual ~Font();
// Resource.
virtual ppapi::thunk::PPB_Font_API* AsPPB_Font_API() OVERRIDE;
// PPB_Font_API implementation.
virtual PP_Bool Describe(PP_FontDescription_Dev* description,
PP_FontMetrics_Dev* metrics) OVERRIDE;
virtual PP_Bool DrawTextAt(PP_Resource image_data,
const PP_TextRun_Dev* text,
const PP_Point* position,
uint32_t color,
const PP_Rect* clip,
PP_Bool image_data_is_opaque) OVERRIDE;
virtual int32_t MeasureText(const PP_TextRun_Dev* text) OVERRIDE;
virtual uint32_t CharacterOffsetForPixel(const PP_TextRun_Dev* text,
int32_t pixel_position) OVERRIDE;
virtual int32_t PixelOffsetForCharacter(const PP_TextRun_Dev* text,
uint32_t char_offset) OVERRIDE;
private:
// Posts the given closure to the WebKit thread.
// If |blocking| is true, the method waits on |webkit_event_| for the task to
// continue.
void RunOnWebKitThread(bool blocking, const base::Closure& task);
static void DeleteFontForwarding(
ppapi::WebKitForwarding::Font* font_forwarding);
base::WaitableEvent webkit_event_;
// This class owns |font_forwarding_|.
// |font_forwarding_| should always be used on the WebKit thread (including
// destruction).
ppapi::WebKitForwarding::Font* font_forwarding_;
DISALLOW_COPY_AND_ASSIGN(Font);
};
} // namespace proxy
} // namespace ppapi
#endif // PPAPI_PROXY_PPB_FONT_PROXY_H_
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