1 files changed, 46 insertions, 0 deletions
diff --git a/core/fpdfapi/fpdf_render/cpdf_type3glyphs.cpp b/core/fpdfapi/fpdf_render/cpdf_type3glyphs.cpp
new file mode 100644
index 0000000000..f450dffa8c
--- /dev/null
+++ b/core/fpdfapi/fpdf_render/cpdf_type3glyphs.cpp
@@ -0,0 +1,46 @@
+// Copyright 2016 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fpdfapi/fpdf_render/cpdf_type3glyphs.h"
+
+#include <map>
+
+#include "core/fxge/include/fx_font.h"
+
+CPDF_Type3Glyphs::CPDF_Type3Glyphs()
+    : m_TopBlueCount(0), m_BottomBlueCount(0) {}
+
+CPDF_Type3Glyphs::~CPDF_Type3Glyphs() {
+  for (const auto& pair : m_GlyphMap)
+    delete pair.second;
+}
+
+static int _AdjustBlue(FX_FLOAT pos, int& count, int blues[]) {
+  FX_FLOAT min_distance = 1000000.0f;
+  int closest_pos = -1;
+  for (int i = 0; i < count; i++) {
+    FX_FLOAT distance = FXSYS_fabs(pos - static_cast<FX_FLOAT>(blues[i]));
+    if (distance < 1.0f * 80.0f / 100.0f && distance < min_distance) {
+      min_distance = distance;
+      closest_pos = i;
+    }
+  }
+  if (closest_pos >= 0)
+    return blues[closest_pos];
+  int new_pos = FXSYS_round(pos);
+  if (count == TYPE3_MAX_BLUES)
+    return new_pos;
+  blues[count++] = new_pos;
+  return new_pos;
+}
+
+void CPDF_Type3Glyphs::AdjustBlue(FX_FLOAT top,
+                                  FX_FLOAT bottom,
+                                  int& top_line,
+                                  int& bottom_line) {
+  top_line = _AdjustBlue(top, m_TopBlueCount, m_TopBlue);
+  bottom_line = _AdjustBlue(bottom, m_BottomBlueCount, m_BottomBlue);
+}