Linux: Take into account the weight/italic parameters when mapping fonts on Linux.

pdf/pdfium/pdfium_engine.cc

 // 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.
 
 #include "pdf/pdfium/pdfium_engine.h"
 
 #include <math.h>
 
 #include "base/json/json_writer.h"
 #include "base/logging.h"
@@ skipping 118 matching lines @@
 
 PP_Instance g_last_instance_id;
 
 struct PDFFontSubstitution {
   const char* pdf_name;
   const char* face;
   bool bold;
   bool italic;
 };
 
+PP_BrowserFont_Trusted_Weight WeightToBrowserFontTrustedWeight(int weight) {
+  COMPILE_ASSERT(PP_BROWSERFONT_TRUSTED_WEIGHT_100 == 0,
+                 PP_BrowserFont_Trusted_Weight_Min);
+  COMPILE_ASSERT(PP_BROWSERFONT_TRUSTED_WEIGHT_900 == 8,
+                 PP_BrowserFont_Trusted_Weight_Max);
+  const int kMinimumWeight = 100;
+  const int kMaximumWeight = 900;
+  int normalized_weight =
+      std::min(std::max(weight, kMinimumWeight), kMaximumWeight);
+  normalized_weight = (normalized_weight / 100) - 1;
+  return static_cast<PP_BrowserFont_Trusted_Weight>(normalized_weight);
+}
+
 // This list is for CPWL_FontMap::GetDefaultFontByCharset().
 // We pretend to have these font natively and let the browser (or underlying
 // fontconfig) to pick the proper font on the system.
 void EnumFonts(struct _FPDF_SYSFONTINFO* sysfontinfo, void* mapper) {
   FPDF_AddInstalledFont(mapper, "Arial", FXFONT_DEFAULT_CHARSET);
 
   int i = 0;
   while (CPWL_FontMap::defaultTTFMap[i].charset != -1) {
     FPDF_AddInstalledFont(mapper,
                           CPWL_FontMap::defaultTTFMap[i].fontname,
@@ skipping 65 matching lines @@
       if (PDFFontSubstitutions[i].italic)
         description.set_italic(true);
       break;
     }
   }
 
   if (i == arraysize(PDFFontSubstitutions)) {
     // TODO(kochi): Pass the face in UTF-8. If face is not encoded in UTF-8,
     // convert to UTF-8 before passing.
     description.set_face(face);
+
+    description.set_weight(WeightToBrowserFontTrustedWeight(weight));
+    description.set_italic(italic > 0);
   }
 
   if (!pp::PDF::IsAvailable()) {
     NOTREACHED();
     return NULL;
   }
 
   PP_Resource font_resource = pp::PDF::GetFontFileWithFallback(
       pp::InstanceHandle(g_last_instance_id),
       &description.pp_font_description(),
@@ skipping 3144 matching lines @@
       if (page_width > *max_page_width) {
         *max_page_width = page_width;
       }
     }
   }
   FPDF_CloseDocument(doc);
   return true;
 }
 
 }  // namespace chrome_pdf