Added support for vector printing for Pepper v1 plugins for Linux....

printing/pdf_ps_metafile_cairo.cc

 // Copyright (c) 2010 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_cairo.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 "printing/units.h"
 #include "skia/ext/vector_platform_device_linux.h"
 
 namespace {
 
+const cairo_user_data_key_t kPdfMetafileKey = {0};
+
 // 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;
 }
 
@@ skipping 21 matching lines @@
   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;
 }
 
+void DestroyContextData(void* data) {
+  // Nothing to be done here.
+}
+
 }  // namespace
 
 namespace printing {
 
 PdfPsMetafile::PdfPsMetafile(const FileFormat& format)
     : format_(format),
       surface_(NULL), context_(NULL) {
 }
 
 PdfPsMetafile::~PdfPsMetafile() {
@@ skipping 35 matching lines @@
 
   // Creates a context.
   context_ = cairo_create(surface_);
   if (!IsContextValid(context_)) {
     DLOG(ERROR) << "Cannot create Cairo context for PdfPsMetafile!";
     CleanUpContext(&context_);
     CleanUpSurface(&surface_);
     return false;
   }
 
+  cairo_set_user_data(context_, &kPdfMetafileKey, this, DestroyContextData);
+
   return true;
 }
 
 bool PdfPsMetafile::Init(const void* src_buffer, uint32 src_buffer_size) {
   // We need to check at least these two members to ensure Init() has not been
   // called before
   DCHECK(!context_);
   DCHECK(data_.empty());
 
   if (src_buffer == NULL || src_buffer_size == 0)
     return false;
 
   data_ = std::string(reinterpret_cast<const char*>(src_buffer),
                       src_buffer_size);
 
   return true;
 }
 
+bool PdfPsMetafile::SetRawData(const void* src_buffer,
+                               uint32 src_buffer_size) {
+  if (!context_) {
+    // If Init has not already been called, just call Init()
+    return Init(src_buffer, src_buffer_size);
+  }
+  // If a context has already been created, remember this data in
+  // raw_override_data_
+  if (src_buffer == NULL || src_buffer_size == 0)
+    return false;
+
+  raw_override_data_ = 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,
                                   double margin_top_in_points,
                                   double margin_right_in_points,
                                   double margin_bottom_in_points,
                                   double margin_left_in_points) {
   DCHECK(IsSurfaceValid(surface_));
   DCHECK(IsContextValid(context_));
   // Passing this check implies page_surface_ is NULL, and current_page_ is
   // empty.
@@ skipping 38 matching lines @@
   cairo_surface_flush(surface_);
   cairo_show_page(context_);
   return true;
 }
 
 void PdfPsMetafile::Close() {
   DCHECK(IsSurfaceValid(surface_));
   DCHECK(IsContextValid(context_));
 
   cairo_surface_finish(surface_);
+
+  // If we have raw PDF/PS data set use that instead of what was drawn.
+  if (!raw_override_data_.empty()) {
+    data_ = raw_override_data_;
+    raw_override_data_.clear();
+  }
   DCHECK(!data_.empty());  // Make sure we did get something.
 
   CleanUpContext(&context_);
   CleanUpSurface(&surface_);
 }
 
 uint32 PdfPsMetafile::GetDataSize() const {
   // We need to check at least these two members to ensure that either Init()
   // has been called to initialize |data_|, or metafile has been closed.
   DCHECK(!context_);
@@ skipping 31 matching lines @@
   if (fd.auto_close) {
     if (HANDLE_EINTR(close(fd.fd)) < 0) {
       DPLOG(WARNING) << "close";
       success = false;
     }
   }
 
   return success;
 }
 
+PdfPsMetafile* PdfPsMetafile::FromCairoContext(cairo_t* context) {
+  return reinterpret_cast<PdfPsMetafile*>(
+      cairo_get_user_data(context, &kPdfMetafileKey));
+}
+
 void PdfPsMetafile::CleanUpAll() {
   CleanUpContext(&context_);
   CleanUpSurface(&surface_);
   data_.clear();
   skia::VectorPlatformDevice::ClearFontCache();
 }
 
 const double PdfPsMetafile::kTopMarginInInch = 0.25;
 const double PdfPsMetafile::kBottomMarginInInch = 0.56;
 const double PdfPsMetafile::kLeftMarginInInch = 0.25;
 const double PdfPsMetafile::kRightMarginInInch = 0.25;
 
 }  // namespace printing