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// Copyright (c) 2012 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_SKIA_H_
#define PRINTING_PDF_METAFILE_SKIA_H_
#include <stdint.h>
#include <memory>
#include "base/macros.h"
#include "build/build_config.h"
#include "cc/paint/paint_canvas.h"
#include "printing/common/pdf_metafile_utils.h"
#include "printing/metafile.h"
#include "skia/ext/platform_canvas.h"
#if defined(OS_WIN)
#include <windows.h>
#endif
namespace printing {
struct PdfMetafileSkiaData;
// This class uses Skia graphics library to generate a PDF or MSKP document.
// TODO(thestig): Rename to MetafileSkia.
class PRINTING_EXPORT PdfMetafileSkia : public Metafile {
public:
// Default constructor, for SkiaDocumentType::PDF type only.
// TODO(weili): we should split up this use case into a different class, see
// comments before InitFromData()'s implementation.
PdfMetafileSkia();
PdfMetafileSkia(SkiaDocumentType type, int document_cookie);
~PdfMetafileSkia() override;
// Metafile methods.
bool Init() override;
bool InitFromData(const void* src_buffer, size_t src_buffer_size) override;
void StartPage(const gfx::Size& page_size,
const gfx::Rect& content_area,
const float& scale_factor) override;
bool FinishPage() override;
bool FinishDocument() override;
uint32_t GetDataSize() const override;
bool GetData(void* dst_buffer, uint32_t dst_buffer_size) const override;
gfx::Rect GetPageBounds(unsigned int page_number) const override;
unsigned int GetPageCount() const override;
printing::NativeDrawingContext context() const override;
#if defined(OS_WIN)
bool Playback(printing::NativeDrawingContext hdc,
const RECT* rect) const override;
bool SafePlayback(printing::NativeDrawingContext hdc) const override;
#elif defined(OS_MACOSX)
bool RenderPage(unsigned int page_number,
printing::NativeDrawingContext context,
const CGRect rect,
const MacRenderPageParams& params) const override;
#endif
bool SaveTo(base::File* file) const override;
// Unlike FinishPage() or FinishDocument(), this is for out-of-process
// subframe printing. It will just serialize the content into SkPicture
// format and store it as final data.
void FinishFrameContent();
// Return a new metafile containing just the current page in draft mode.
std::unique_ptr<PdfMetafileSkia> GetMetafileForCurrentPage(
SkiaDocumentType type);
// This method calls StartPage and then returns an appropriate
// PlatformCanvas implementation bound to the context created by
// StartPage or NULL on error. The PaintCanvas pointer that
// is returned is owned by this PdfMetafileSkia object and does not
// need to be ref()ed or unref()ed. The canvas will remain valid
// until FinishPage() or FinishDocument() is called.
cc::PaintCanvas* GetVectorCanvasForNewPage(const gfx::Size& page_size,
const gfx::Rect& content_area,
const float& scale_factor);
// This is used for painting content of out-of-process subframes.
// For such a subframe, since the content is in another process, we create a
// place holder picture now, and replace it with actual content by pdf
// compositor service later.
uint32_t CreateContentForRemoteFrame(const gfx::Rect& rect,
int render_proxy_id);
int GetDocumentCookie() const;
const ContentToProxyIdMap& GetSubframeContentInfo() const;
private:
// Callback function used during page content drawing to replace a custom
// data holder with corresponding place holder SkPicture.
void CustomDataToSkPictureCallback(SkCanvas* canvas, uint32_t content_id);
std::unique_ptr<PdfMetafileSkiaData> data_;
DISALLOW_COPY_AND_ASSIGN(PdfMetafileSkia);
};
} // namespace printing
#endif // PRINTING_PDF_METAFILE_SKIA_H_
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