Index: printing/pdf_ps_metafile_linux.cc |
=================================================================== |
--- printing/pdf_ps_metafile_linux.cc (revision 38032) |
+++ printing/pdf_ps_metafile_linux.cc (working copy) |
@@ -1,376 +0,0 @@ |
-// 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. |
- |
-#include "printing/pdf_ps_metafile_linux.h" |
- |
-#include <stdio.h> |
- |
-#include <cairo.h> |
-#include <cairo-pdf.h> |
-#include <cairo-ps.h> |
- |
-#include "base/eintr_wrapper.h" |
-#include "base/file_descriptor_posix.h" |
-#include "base/file_util.h" |
-#include "base/logging.h" |
-#include "skia/ext/vector_platform_device_linux.h" |
- |
-namespace { |
- |
-// Tests if |surface| is valid. |
-bool IsSurfaceValid(cairo_surface_t* surface) { |
- return cairo_surface_status(surface) == CAIRO_STATUS_SUCCESS; |
-} |
- |
-// Tests if |context| is valid. |
-bool IsContextValid(cairo_t* context) { |
- return cairo_status(context) == CAIRO_STATUS_SUCCESS; |
-} |
- |
-// Destroys and resets |surface|. |
-void CleanUpSurface(cairo_surface_t** surface) { |
- if (*surface) { |
- cairo_surface_destroy(*surface); |
- *surface = NULL; |
- } |
-} |
- |
-// Destroys and resets |context|. |
-void CleanUpContext(cairo_t** context) { |
- if (*context) { |
- cairo_destroy(*context); |
- *context = NULL; |
- } |
-} |
- |
-// Callback function for Cairo to write PDF/PS stream. |
-// |dst_buffer| is actually a pointer of type `std::string*`. |
-cairo_status_t WriteCairoStream(void* dst_buffer, |
- const unsigned char* src_data, |
- unsigned int src_data_length) { |
- DCHECK(dst_buffer); |
- DCHECK(src_data); |
- DCHECK_GT(src_data_length, 0u); |
- |
- std::string* buffer = reinterpret_cast<std::string*>(dst_buffer); |
- buffer->append(reinterpret_cast<const char*>(src_data), src_data_length); |
- |
- return CAIRO_STATUS_SUCCESS; |
-} |
- |
-} // namespace |
- |
-namespace printing { |
- |
-PdfPsMetafile::PdfPsMetafile(const FileFormat& format) |
- : format_(format), |
- surface_(NULL), context_(NULL), |
- page_surface_(NULL), page_context_(NULL) { |
-} |
- |
-PdfPsMetafile::~PdfPsMetafile() { |
- // Releases all resources if we forgot to do so. |
- CleanUpAll(); |
-} |
- |
-bool PdfPsMetafile::Init() { |
- // We need to check at least these two members to ensure Init() has not been |
- // called before. Passing these two checks also implies that surface_, |
- // page_surface_, and page_context_ are NULL, and current_page_ is empty. |
- DCHECK(!context_); |
- DCHECK(all_pages_.empty()); |
- |
- // Creates an 1 by 1 Cairo surface for entire PDF/PS file. |
- // The size for each page will be overwritten later in StartPage(). |
- switch (format_) { |
- case PDF: { |
- surface_ = cairo_pdf_surface_create_for_stream(WriteCairoStream, |
- &all_pages_, 1, 1); |
- } |
- break; |
- |
- case PS: { |
- surface_ = cairo_ps_surface_create_for_stream(WriteCairoStream, |
- &all_pages_, 1, 1); |
- } |
- break; |
- |
- default: |
- NOTREACHED(); |
- return false; |
- } |
- |
- // Cairo always returns a valid pointer. |
- // Hence, we have to check if it points to a "nil" object. |
- if (!IsSurfaceValid(surface_)) { |
- DLOG(ERROR) << "Cannot create Cairo surface for PdfPsMetafile!"; |
- CleanUpSurface(&surface_); |
- return false; |
- } |
- |
- // Creates a context. |
- context_ = cairo_create(surface_); |
- if (!IsContextValid(context_)) { |
- DLOG(ERROR) << "Cannot create Cairo context for PdfPsMetafile!"; |
- CleanUpContext(&context_); |
- CleanUpSurface(&surface_); |
- return false; |
- } |
- |
- return true; |
-} |
- |
-bool PdfPsMetafile::Init(const void* src_buffer, size_t src_buffer_size) { |
- // We need to check at least these two members to ensure Init() has not been |
- // called before. Passing these two checks also implies that surface_, |
- // page_surface_, and page_context_ are NULL, and current_page_ is empty. |
- DCHECK(!context_); |
- DCHECK(all_pages_.empty()); |
- |
- if (src_buffer == NULL || src_buffer_size == 0) { |
- return false; |
- } |
- |
- all_pages_ = std::string(reinterpret_cast<const char*>(src_buffer), |
- src_buffer_size); |
- |
- return true; |
-} |
- |
-cairo_t* PdfPsMetafile::StartPage(double width_in_points, |
- double height_in_points) { |
- DCHECK(IsSurfaceValid(surface_)); |
- DCHECK(IsContextValid(context_)); |
- // Passing this check implies page_surface_ is NULL, and current_page_ is |
- // empty. |
- DCHECK(!page_context_); |
- DCHECK_GT(width_in_points, 0.); |
- DCHECK_GT(height_in_points, 0.); |
- |
- // Creates a target surface for the new page. |
- // Cairo 1.6.0 does NOT allow the first argument be NULL, |
- // but some newer versions do support NULL pointer. |
- switch (format_) { |
- case PDF: { |
- page_surface_ = cairo_pdf_surface_create_for_stream(WriteCairoStream, |
- ¤t_page_, |
- width_in_points, |
- height_in_points); |
- } |
- break; |
- |
- case PS: { |
- page_surface_ = cairo_ps_surface_create_for_stream(WriteCairoStream, |
- ¤t_page_, |
- width_in_points, |
- height_in_points); |
- } |
- break; |
- |
- default: |
- NOTREACHED(); |
- CleanUpAll(); |
- return NULL; |
- } |
- |
- // Cairo always returns a valid pointer. |
- // Hence, we have to check if it points to a "nil" object. |
- if (!IsSurfaceValid(page_surface_)) { |
- DLOG(ERROR) << "Cannot create Cairo surface for PdfPsMetafile!"; |
- CleanUpAll(); |
- return NULL; |
- } |
- |
- // Creates a context. |
- page_context_ = cairo_create(page_surface_); |
- if (!IsContextValid(page_context_)) { |
- DLOG(ERROR) << "Cannot create Cairo context for PdfPsMetafile!"; |
- CleanUpAll(); |
- return NULL; |
- } |
- |
- return page_context_; |
-} |
- |
-bool PdfPsMetafile::FinishPage(float shrink) { |
- DCHECK(IsSurfaceValid(surface_)); |
- DCHECK(IsContextValid(context_)); |
- DCHECK(IsSurfaceValid(page_surface_)); |
- DCHECK(IsContextValid(page_context_)); |
- DCHECK_GT(shrink, 0); |
- |
- // Flushes all rendering for current page. |
- cairo_surface_flush(page_surface_); |
- |
- // TODO(myhuang): Use real page settings. |
- // We hard-coded page settings here for testing purpose. |
- // The paper size is US Letter (8.5 in. by 11 in.). |
- // The default margins are: |
- // Left = 0.25 in. |
- // Right = 0.25 in. |
- // Top = 0.25 in. |
- // Bottom = 0.56 in. |
- const double kDPI = 72.0; // Dots (points) per inch. |
- const double kWidthInInch = 8.5; |
- const double kHeightInInch = 11.0; |
- const double kWidthInPoint = kWidthInInch * kDPI; |
- const double kHeightInPoint = kHeightInInch * kDPI; |
- switch (format_) { |
- case PDF: { |
- cairo_pdf_surface_set_size(surface_, kWidthInPoint, kHeightInPoint); |
- } |
- break; |
- |
- case PS: { |
- cairo_ps_surface_set_size(surface_, kWidthInPoint, kHeightInPoint); |
- } |
- break; |
- |
- default: |
- NOTREACHED(); |
- CleanUpAll(); |
- return false; |
- } |
- |
- // Checks if our surface is still valid after resizing. |
- if (!IsSurfaceValid(surface_)) { |
- DLOG(ERROR) << "Cannot resize Cairo surface for PdfPsMetafile!"; |
- CleanUpAll(); |
- return false; |
- } |
- |
- // Saves context's states. |
- cairo_save(context_); |
- // Copies current page onto the surface of final result. |
- // Margins are done by coordinates transformation. |
- // Please NOTE that we have to call cairo_scale() before we call |
- // cairo_set_source_surface(). |
- const double scale_factor = 1. / shrink; |
- cairo_scale(context_, scale_factor, scale_factor); |
- const double kLeftMarginInInch = 0.25; |
- const double kTopMarginInInch = 0.25; |
- const double kLeftMarginInPoint = kLeftMarginInInch * kDPI; |
- const double kTopMarginInPoint = kTopMarginInInch * kDPI; |
- const double kScaledLeftMarginInPoint = kLeftMarginInPoint * shrink; |
- const double kScaledTopMarginInPoint = kTopMarginInPoint * shrink; |
- cairo_set_source_surface(context_, |
- page_surface_, |
- kScaledLeftMarginInPoint, |
- kScaledTopMarginInPoint); |
- // In Cairo 1.6.0, if we use the following API, either the renderer will |
- // crash, or we will get an empty page. This might be a bug in Cairo. |
- // cairo_set_operator(context_, CAIRO_OPERATOR_SOURCE); |
- const double kRightMarginInInch = 0.25; |
- const double kBottomMarginInInch = 0.56; |
- const double kPrintableWidthInInch = |
- kWidthInInch - kLeftMarginInInch - kRightMarginInInch; |
- const double kPrintableHeightInInch = |
- kHeightInInch - kTopMarginInInch - kBottomMarginInInch; |
- const double kScaledPrintableWidthInPoint = |
- kPrintableWidthInInch * kDPI * shrink; |
- const double kScaledPrintableHeightInPoint = |
- kPrintableHeightInInch * kDPI * shrink; |
- cairo_rectangle(context_, |
- kScaledLeftMarginInPoint, |
- kScaledTopMarginInPoint, |
- kScaledPrintableWidthInPoint, |
- kScaledPrintableHeightInPoint); |
- cairo_fill(context_); |
- |
- // Finishes the duplication of current page. |
- cairo_show_page(context_); |
- cairo_surface_flush(surface_); |
- |
- // Destroys resources for current page. |
- CleanUpContext(&page_context_); |
- CleanUpSurface(&page_surface_); |
- current_page_.clear(); |
- |
- // Restores context's states. |
- cairo_restore(context_); |
- |
- return true; |
-} |
- |
-void PdfPsMetafile::Close() { |
- DCHECK(IsSurfaceValid(surface_)); |
- DCHECK(IsContextValid(context_)); |
- // Passing this check implies page_surface_ is NULL, and current_page_ is |
- // empty. |
- DCHECK(!page_context_); |
- |
- cairo_surface_finish(surface_); |
- DCHECK(!all_pages_.empty()); // Make sure we did get something. |
- |
- CleanUpContext(&context_); |
- CleanUpSurface(&surface_); |
-} |
- |
-unsigned int PdfPsMetafile::GetDataSize() const { |
- // We need to check at least these two members to ensure that either Init() |
- // has been called to initialize |all_pages_|, or metafile has been closed. |
- // Passing these two checks also implies that surface_, page_surface_, and |
- // page_context_ are NULL, and current_page_ is empty. |
- DCHECK(!context_); |
- DCHECK(!all_pages_.empty()); |
- |
- return all_pages_.size(); |
-} |
- |
-bool PdfPsMetafile::GetData(void* dst_buffer, size_t dst_buffer_size) const { |
- DCHECK(dst_buffer); |
- DCHECK_GT(dst_buffer_size, 0u); |
- // We need to check at least these two members to ensure that either Init() |
- // has been called to initialize |all_pages_|, or metafile has been closed. |
- // Passing these two checks also implies that surface_, page_surface_, and |
- // page_context_ are NULL, and current_page_ is empty. |
- DCHECK(!context_); |
- DCHECK(!all_pages_.empty()); |
- |
- size_t data_size = GetDataSize(); |
- if (dst_buffer_size > data_size) { |
- return false; |
- } |
- |
- memcpy(dst_buffer, all_pages_.data(), dst_buffer_size); |
- |
- return true; |
-} |
- |
-bool PdfPsMetafile::SaveTo(const base::FileDescriptor& fd) const { |
- // We need to check at least these two members to ensure that either Init() |
- // has been called to initialize |all_pages_|, or metafile has been closed. |
- // Passing these two checks also implies that surface_, page_surface_, and |
- // page_context_ are NULL, and current_page_ is empty. |
- DCHECK(!context_); |
- DCHECK(!all_pages_.empty()); |
- |
- if (fd.fd < 0) { |
- DLOG(ERROR) << "Invalid file descriptor!"; |
- return false; |
- } |
- |
- bool success = true; |
- if (file_util::WriteFileDescriptor(fd.fd, all_pages_.data(), |
- GetDataSize()) < 0) { |
- DLOG(ERROR) << "Failed to save file with fd " << fd.fd; |
- success = false; |
- } |
- |
- if (fd.auto_close) |
- HANDLE_EINTR(close(fd.fd)); |
- return success; |
-} |
- |
-void PdfPsMetafile::CleanUpAll() { |
- CleanUpContext(&context_); |
- CleanUpSurface(&surface_); |
- CleanUpContext(&page_context_); |
- CleanUpSurface(&page_surface_); |
- current_page_.clear(); |
- all_pages_.clear(); |
- skia::VectorPlatformDevice::ClearFontCache(); |
-} |
- |
-} // namespace printing |