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Unified Diff: printing/pdf_ps_metafile_linux.cc

Issue 565043: OpenBSD/FreeBSD GYP changes (most of the remaining ones) (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: '' Created 10 years, 11 months ago
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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,
- &current_page_,
- width_in_points,
- height_in_points);
- }
- break;
-
- case PS: {
- page_surface_ = cairo_ps_surface_create_for_stream(WriteCairoStream,
- &current_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

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