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// Copyright 2013 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 EXTENSIONS_BROWSER_API_WEB_CONTENTS_CAPTURE_CLIENT_H_
#define EXTENSIONS_BROWSER_API_WEB_CONTENTS_CAPTURE_CLIENT_H_
#include "base/macros.h"
#include "content/public/browser/readback_types.h"
#include "extensions/browser/extension_function.h"
#include "extensions/common/api/extension_types.h"
class SkBitmap;
namespace content {
class WebContents;
}
namespace extensions {
// Base class for capturing visible area of a WebContents.
// This is used by both webview.captureVisibleRegion and tabs.captureVisibleTab.
class WebContentsCaptureClient {
public:
WebContentsCaptureClient() {}
protected:
virtual ~WebContentsCaptureClient() {}
virtual bool IsScreenshotEnabled() = 0;
virtual bool ClientAllowsTransparency() = 0;
enum FailureReason {
FAILURE_REASON_UNKNOWN,
FAILURE_REASON_ENCODING_FAILED,
FAILURE_REASON_VIEW_INVISIBLE
};
bool CaptureAsync(content::WebContents* web_contents,
const api::extension_types::ImageDetails* image_detail,
const content::ReadbackRequestCallback callback);
bool EncodeBitmap(const SkBitmap& bitmap, std::string* base64_result);
virtual void OnCaptureFailure(FailureReason reason) = 0;
virtual void OnCaptureSuccess(const SkBitmap& bitmap) = 0;
void CopyFromBackingStoreComplete(const SkBitmap& bitmap,
content::ReadbackResponse response);
private:
// The format (JPEG vs PNG) of the resulting image. Set in RunAsync().
api::extension_types::ImageFormat image_format_;
// Quality setting to use when encoding jpegs. Set in RunAsync().
int image_quality_;
DISALLOW_COPY_AND_ASSIGN(WebContentsCaptureClient);
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_API_WEB_CONTENTS_CAPTURE_CLIENT_H_
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