Split core/include/fpdfapi/fpdf_resource.h

core/fpdfapi/fpdf_font/cpdf_simplefont.cpp

+// 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_font/cpdf_simplefont.h"
+
+#include "core/fpdfapi/fpdf_font/font_int.h"
+#include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
+#include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
+#include "core/include/fxge/fx_freetype.h"
+
+CPDF_SimpleFont::CPDF_SimpleFont()
+    : m_pCharNames(nullptr), m_BaseEncoding(PDFFONT_ENCODING_BUILTIN) {
+  FXSYS_memset(m_CharWidth, 0xff, sizeof m_CharWidth);
+  FXSYS_memset(m_GlyphIndex, 0xff, sizeof m_GlyphIndex);
+  FXSYS_memset(m_ExtGID, 0xff, sizeof m_ExtGID);
+}
+
+CPDF_SimpleFont::~CPDF_SimpleFont() {
+  delete[] m_pCharNames;
+}
+
+int CPDF_SimpleFont::GlyphFromCharCode(FX_DWORD charcode, FX_BOOL* pVertGlyph) {
+  if (pVertGlyph) {
+    *pVertGlyph = FALSE;
+  }
+  if (charcode > 0xff) {
+    return -1;
+  }
+  int index = m_GlyphIndex[(uint8_t)charcode];
+  if (index == 0xffff) {
+    return -1;
+  }
+  return index;
+}
+
+void CPDF_SimpleFont::LoadCharMetrics(int charcode) {
+  if (!m_Font.GetFace())
+    return;
+
+  if (charcode < 0 || charcode > 0xff) {
+    return;
+  }
+  int glyph_index = m_GlyphIndex[charcode];
+  if (glyph_index == 0xffff) {
+    if (!m_pFontFile && charcode != 32) {
+      LoadCharMetrics(32);
+      m_CharBBox[charcode] = m_CharBBox[32];
+      if (m_bUseFontWidth) {
+        m_CharWidth[charcode] = m_CharWidth[32];
+      }
+    }
+    return;
+  }
+  FXFT_Face face = m_Font.GetFace();
+  int err = FXFT_Load_Glyph(
+      face, glyph_index,
+      FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);
+  if (err) {
+    return;
+  }
+  m_CharBBox[charcode] = FX_SMALL_RECT(
+      TT2PDF(FXFT_Get_Glyph_HoriBearingX(face), face),
+      TT2PDF(FXFT_Get_Glyph_HoriBearingY(face), face),
+      TT2PDF(FXFT_Get_Glyph_HoriBearingX(face) + FXFT_Get_Glyph_Width(face),
+             face),
+      TT2PDF(FXFT_Get_Glyph_HoriBearingY(face) - FXFT_Get_Glyph_Height(face),
+             face));
+
+  if (m_bUseFontWidth) {
+    int TT_Width = TT2PDF(FXFT_Get_Glyph_HoriAdvance(face), face);
+    if (m_CharWidth[charcode] == 0xffff) {
+      m_CharWidth[charcode] = TT_Width;
+    } else if (TT_Width && !IsEmbedded()) {
+      m_CharBBox[charcode].right =
+          m_CharBBox[charcode].right * m_CharWidth[charcode] / TT_Width;
+      m_CharBBox[charcode].left =
+          m_CharBBox[charcode].left * m_CharWidth[charcode] / TT_Width;
+    }
+  }
+}
+
+int CPDF_SimpleFont::GetCharWidthF(FX_DWORD charcode, int level) {
+  if (charcode > 0xff) {
+    charcode = 0;
+  }
+  if (m_CharWidth[charcode] == 0xffff) {
+    LoadCharMetrics(charcode);
+    if (m_CharWidth[charcode] == 0xffff) {
+      m_CharWidth[charcode] = 0;
+    }
+  }
+  return (int16_t)m_CharWidth[charcode];
+}
+
+FX_RECT CPDF_SimpleFont::GetCharBBox(FX_DWORD charcode, int level) {
+  if (charcode > 0xff)
+    charcode = 0;
+
+  if (m_CharBBox[charcode].left == FX_SMALL_RECT::kInvalid)
+    LoadCharMetrics(charcode);
+
+  return FX_RECT(m_CharBBox[charcode]);
+}
+
+FX_BOOL CPDF_SimpleFont::LoadCommon() {
+  CPDF_Dictionary* pFontDesc = m_pFontDict->GetDictBy("FontDescriptor");
+  if (pFontDesc) {
+    LoadFontDescriptor(pFontDesc);
+  }
+  CPDF_Array* pWidthArray = m_pFontDict->GetArrayBy("Widths");
+  int width_start = 0, width_end = -1;
+  m_bUseFontWidth = TRUE;
+  if (pWidthArray) {
+    m_bUseFontWidth = FALSE;
+    if (pFontDesc && pFontDesc->KeyExist("MissingWidth")) {
+      int MissingWidth = pFontDesc->GetIntegerBy("MissingWidth");
+      for (int i = 0; i < 256; i++) {
+        m_CharWidth[i] = MissingWidth;
+      }
+    }
+    width_start = m_pFontDict->GetIntegerBy("FirstChar", 0);
+    width_end = m_pFontDict->GetIntegerBy("LastChar", 0);
+    if (width_start >= 0 && width_start <= 255) {
+      if (width_end <= 0 ||
+          width_end >= width_start + (int)pWidthArray->GetCount()) {
+        width_end = width_start + pWidthArray->GetCount() - 1;
+      }
+      if (width_end > 255) {
+        width_end = 255;
+      }
+      for (int i = width_start; i <= width_end; i++) {
+        m_CharWidth[i] = pWidthArray->GetIntegerAt(i - width_start);
+      }
+    }
+  }
+  if (m_pFontFile) {
+    if (m_BaseFont.GetLength() > 8 && m_BaseFont[7] == '+') {
+      m_BaseFont = m_BaseFont.Mid(8);
+    }
+  } else {
+    LoadSubstFont();
+  }
+  if (!(m_Flags & PDFFONT_SYMBOLIC)) {
+    m_BaseEncoding = PDFFONT_ENCODING_STANDARD;
+  }
+  CPDF_Object* pEncoding = m_pFontDict->GetElementValue("Encoding");
+  LoadPDFEncoding(pEncoding, m_BaseEncoding, m_pCharNames, m_pFontFile != NULL,
+                  m_Font.IsTTFont());
+  LoadGlyphMap();
+  delete[] m_pCharNames;
+  m_pCharNames = NULL;
+  if (!m_Font.GetFace())
+    return TRUE;
+
+  if (m_Flags & PDFFONT_ALLCAP) {
+    unsigned char lowercases[] = {'a', 'z', 0xe0, 0xf6, 0xf8, 0xfd};
+    for (size_t range = 0; range < sizeof lowercases / 2; range++) {
+      for (int i = lowercases[range * 2]; i <= lowercases[range * 2 + 1]; i++) {
+        if (m_GlyphIndex[i] != 0xffff && m_pFontFile) {
+          continue;
+        }
+        m_GlyphIndex[i] = m_GlyphIndex[i - 32];
+        if (m_CharWidth[i - 32]) {
+          m_CharWidth[i] = m_CharWidth[i - 32];
+          m_CharBBox[i] = m_CharBBox[i - 32];
+        }
+      }
+    }
+  }
+  CheckFontMetrics();
+  return TRUE;
+}
+
+void CPDF_SimpleFont::LoadSubstFont() {
+  if (!m_bUseFontWidth && !(m_Flags & PDFFONT_FIXEDPITCH)) {
+    int width = 0, i;
+    for (i = 0; i < 256; i++) {
+      if (m_CharWidth[i] == 0 || m_CharWidth[i] == 0xffff) {
+        continue;
+      }
+      if (width == 0) {
+        width = m_CharWidth[i];
+      } else if (width != m_CharWidth[i]) {
+        break;
+      }
+    }
+    if (i == 256 && width) {
+      m_Flags |= PDFFONT_FIXEDPITCH;
+    }
+  }
+  int weight = m_StemV < 140 ? m_StemV * 5 : (m_StemV * 4 + 140);
+  m_Font.LoadSubst(m_BaseFont, IsTrueTypeFont(), m_Flags, weight, m_ItalicAngle,
+                   0);
+  if (m_Font.GetSubstFont()->m_SubstFlags & FXFONT_SUBST_NONSYMBOL) {
+  }
+}
+
+FX_BOOL CPDF_SimpleFont::IsUnicodeCompatible() const {
+  return m_BaseEncoding != PDFFONT_ENCODING_BUILTIN &&
+         m_BaseEncoding != PDFFONT_ENCODING_ADOBE_SYMBOL &&
+         m_BaseEncoding != PDFFONT_ENCODING_ZAPFDINGBATS;
+}
+
+CFX_WideString CPDF_SimpleFont::UnicodeFromCharCode(FX_DWORD charcode) const {
+  CFX_WideString unicode = CPDF_Font::UnicodeFromCharCode(charcode);
+  if (!unicode.IsEmpty())
+    return unicode;
+  FX_WCHAR ret = m_Encoding.UnicodeFromCharCode((uint8_t)charcode);
+  if (ret == 0)
+    return CFX_WideString();
+  return ret;
+}
+
+FX_DWORD CPDF_SimpleFont::CharCodeFromUnicode(FX_WCHAR unicode) const {
+  FX_DWORD ret = CPDF_Font::CharCodeFromUnicode(unicode);
+  if (ret)
+    return ret;
+  return m_Encoding.CharCodeFromUnicode(unicode);
+}