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| author | pvalchev@google.com <pvalchev@google.com@0039d316-1c4b-4281-b951-d872f2087c98> | 2010-02-04 04:19:35 +0000 |
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| committer | pvalchev@google.com <pvalchev@google.com@0039d316-1c4b-4281-b951-d872f2087c98> | 2010-02-04 04:19:35 +0000 |
| commit | 60b2c071b12334b8b70e65c528588fbdf310b8ca (patch) | |
| tree | a9fd7a7b86c4499b3ccc79e7e77c506a73cebb07 /printing/pdf_ps_metafile_cairo.h | |
| parent | f6dc8961a5a6dae4bdd32f43d28b3c8efadb8b25 (diff) | |
| download | chromium_src-60b2c071b12334b8b70e65c528588fbdf310b8ca.zip chromium_src-60b2c071b12334b8b70e65c528588fbdf310b8ca.tar.gz chromium_src-60b2c071b12334b8b70e65c528588fbdf310b8ca.tar.bz2 | |
OpenBSD/FreeBSD GYP changes (most of the remaining ones)
Review URL: http://codereview.chromium.org/565043
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@38079 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'printing/pdf_ps_metafile_cairo.h')
| -rw-r--r-- | printing/pdf_ps_metafile_cairo.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/printing/pdf_ps_metafile_cairo.h b/printing/pdf_ps_metafile_cairo.h new file mode 100644 index 0000000..1a7bd01 --- /dev/null +++ b/printing/pdf_ps_metafile_cairo.h @@ -0,0 +1,110 @@ +// Copyright (c) 2009 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_PS_METAFILE_CAIRO_H_ +#define PRINTING_PDF_PS_METAFILE_CAIRO_H_ + +#include <string> + +#include "base/basictypes.h" + +typedef struct _cairo_surface cairo_surface_t; +typedef struct _cairo cairo_t; + +namespace base { +class FileDescriptor; +} + +class FilePath; + +namespace printing { + +// This class uses Cairo graphics library to generate PostScript/PDF stream +// and stores rendering results in a string buffer. +class PdfPsMetafile { + public: + enum FileFormat { + PDF, + PS, + }; + + // In the renderer process, callers should also call Init(void) to see if the + // metafile can obtain all necessary rendering resources. + // In the browser process, callers should also call Init(const void*, size_t) + // to initialize the buffer |all_pages_| to use SaveTo(). + explicit PdfPsMetafile(const FileFormat& format); + + ~PdfPsMetafile(); + + // Initializes to a fresh new metafile. Returns true on success. + // Note: Only call in the renderer to allocate rendering resources. + bool Init(); + + // Initializes a copy of metafile from PDF/PS stream data. + // Returns true on success. + // |src_buffer| should point to the shared memory which stores PDF/PS + // contents generated in the renderer. + // Note: Only call in the browser to initialize |all_pages_|. + bool Init(const void* src_buffer, size_t src_buffer_size); + + FileFormat GetFileFormat() const { return format_; } + + // Prepares a new cairo surface/context for rendering a new page. + // The unit is in point (=1/72 in). + // Returns NULL when failed. + cairo_t* StartPage(double width, double height); + + // Destroys the surface and the context used in rendering current page. + // The results of current page will be appended into buffer |all_pages_|. + // Returns true on success + // TODO(myhuang): I plan to also do page setup here (margins, the header + // and the footer). At this moment, only pre-defined margins for US letter + // paper are hard-coded here. + // |shrink| decides the scaling factor to fit raw printing results into + // printable area. + bool FinishPage(float shrink); + + // Closes resulting PDF/PS file. No further rendering is allowed. + void Close(); + + // Returns size of PDF/PS contents stored in buffer |all_pages_|. + // This function should ONLY be called after PDF/PS file is closed. + unsigned int GetDataSize() const; + + // Copies PDF/PS contents stored in buffer |all_pages_| into |dst_buffer|. + // This function should ONLY be called after PDF/PS file is closed. + // Returns true only when success. + bool GetData(void* dst_buffer, size_t dst_buffer_size) const; + + // Saves PDF/PS contents stored in buffer |all_pages_| into the file + // associated with |fd|. + // This function should ONLY be called after PDF/PS file is closed. + bool SaveTo(const base::FileDescriptor& fd) const; + + private: + // Cleans up all resources. + void CleanUpAll(); + + FileFormat format_; + + // Cairo surface and context for entire PDF/PS file. + cairo_surface_t* surface_; + cairo_t* context_; + + // Cairo surface and context for current page only. + cairo_surface_t* page_surface_; + cairo_t* page_context_; + + // Buffer stores PDF/PS contents for entire PDF/PS file. + std::string all_pages_; + + // Buffer stores PDF/PS contents for current page only. + std::string current_page_; + + DISALLOW_COPY_AND_ASSIGN(PdfPsMetafile); +}; + +} // namespace printing + +#endif // PRINTING_PDF_PS_METAFILE_CAIRO_H_ |