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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_SHARED_IMPL_WEBKIT_FORWARDING_H_
#define PPAPI_SHARED_IMPL_WEBKIT_FORWARDING_H_
#include <string>
#include "ppapi/c/pp_bool.h"
#include "ppapi/c/pp_stdint.h"
#include "ppapi/shared_impl/ppapi_shared_export.h"
struct PP_FontDescription_Dev;
struct PP_FontMetrics_Dev;
struct PP_Point;
struct PP_Rect;
namespace base {
class WaitableEvent;
}
namespace skia {
class PlatformCanvas;
}
namespace ppapi {
struct Preferences;
class PPAPI_SHARED_EXPORT WebKitForwarding {
public:
class PPAPI_SHARED_EXPORT Font {
public:
// C++ version of PP_TextRun_Dev. Since the functions below will be called
// on an alternate thread in the proxy, and since there are different
// methods of converting PP_Var -> strings in the plugin and the proxy, we
// can't use PP_Vars in the Do* functions below.
struct TextRun {
std::string text;
bool rtl;
bool override_direction;
};
// DoDrawText takes too many arguments to be used with base::Bind, so we
// use this struct to hold them.
struct PPAPI_SHARED_EXPORT DrawTextParams {
DrawTextParams(skia::PlatformCanvas* destination_arg,
const TextRun& text_arg,
const PP_Point* position_arg,
uint32_t color_arg,
const PP_Rect* clip_arg,
PP_Bool image_data_is_opaque_arg);
~DrawTextParams();
skia::PlatformCanvas* destination;
const TextRun& text;
const PP_Point* position;
uint32_t color;
const PP_Rect* clip;
PP_Bool image_data_is_opaque;
};
virtual ~Font();
// The face name in the description is not filled in to avoid a dependency
// on creating vars. Instead, the face name is placed into the given
// string. See class description for waitable_event documentation. If
// non-null, the given event will be set on completion.
virtual void Describe(base::WaitableEvent* event,
PP_FontDescription_Dev* description,
std::string* face,
PP_FontMetrics_Dev* metrics,
PP_Bool* result) = 0;
virtual void DrawTextAt(base::WaitableEvent* event,
const DrawTextParams& params) = 0;
virtual void MeasureText(base::WaitableEvent* event,
const TextRun& text,
int32_t* result) = 0;
virtual void CharacterOffsetForPixel(base::WaitableEvent* event,
const TextRun& text,
int32_t pixel_position,
uint32_t* result) = 0;
virtual void PixelOffsetForCharacter(base::WaitableEvent* event,
const TextRun& text,
uint32_t char_offset,
int32_t* result) = 0;
};
virtual ~WebKitForwarding();
// Creates a new font with the given description. The desc_face is the face
// name already extracted from the description. The caller owns the result
// pointer, which will never be NULL. If non-null, the given event will be
// set on completion.
virtual void CreateFontForwarding(base::WaitableEvent* event,
const PP_FontDescription_Dev& desc,
const std::string& desc_face,
const Preferences& prefs,
Font** result) = 0;
};
} // namespace ppapi
#endif // PPAPI_SHARED_IMPL_WEBKIT_FORWARDING_H_
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