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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 PRINTING_PDF_METAFILE_CAIRO_LINUX_H_
#define PRINTING_PDF_METAFILE_CAIRO_LINUX_H_
#include <string>
#include "base/basictypes.h"
#include "base/gtest_prod_util.h"
#include "printing/metafile.h"
namespace gfx {
class Point;
class Rect;
class Size;
}
typedef struct _cairo_surface cairo_surface_t;
namespace printing {
// This class uses Cairo graphics library to generate PDF stream and stores
// rendering results in a string buffer.
class PdfMetafileCairo : public Metafile {
public:
PdfMetafileCairo();
virtual ~PdfMetafileCairo();
// Metafile methods.
virtual bool Init();
// Calling InitFromData() sets the data for this metafile and masks data
// induced by previous calls to Init() or InitFromData(), even if drawing
// continues on the surface returned by a previous call to Init().
virtual bool InitFromData(const void* src_buffer, uint32 src_buffer_size);
virtual SkDevice* StartPageForVectorCanvas(
const gfx::Size& page_size, const gfx::Rect& content_area,
const float& scale_factor);
virtual bool StartPage(const gfx::Size& page_size,
const gfx::Rect& content_area,
const float& scale_factor);
virtual bool FinishPage();
virtual bool FinishDocument();
virtual uint32 GetDataSize() const;
virtual bool GetData(void* dst_buffer, uint32 dst_buffer_size) const;
virtual bool SaveTo(const FilePath& file_path) const;
virtual gfx::Rect GetPageBounds(unsigned int page_number) const;
virtual unsigned int GetPageCount() const;
virtual cairo_t* context() const;
#if defined(OS_CHROMEOS)
virtual bool SaveToFD(const base::FileDescriptor& fd) const;
#endif // if defined(OS_CHROMEOS)
private:
// Cleans up all resources.
void CleanUpAll();
// Cairo surface and context for entire PDF file.
cairo_surface_t* surface_;
cairo_t* context_;
// Buffer stores PDF contents for entire PDF file.
std::string cairo_data_;
// Buffer stores PDF contents. It can only be populated from InitFromData().
// Any calls to StartPage(), FinishPage(), FinishDocument() do not affect
// this buffer.
// Note: Such calls will result in DCHECK errors if Init() has not been called
// first.
std::string raw_data_;
// Points to the appropriate buffer depending on the way the object was
// initialized (Init() vs InitFromData()).
std::string* current_data_;
DISALLOW_COPY_AND_ASSIGN(PdfMetafileCairo);
};
} // namespace printing
#endif // PRINTING_PDF_METAFILE_CAIRO_LINUX_H_