Move core/fpdfapi/fpdf_font to core/fpdfapi/font

core/fpdfapi/fpdf_font/cpdf_type3font.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_type3font.h"
-
-#include <utility>
-
-#include "core/fpdfapi/fpdf_font/cpdf_type3char.h"
-#include "core/fpdfapi/fpdf_page/cpdf_form.h"
-#include "core/fpdfapi/fpdf_page/pageint.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_array.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_dictionary.h"
-#include "core/fxcrt/fx_system.h"
-#include "third_party/base/stl_util.h"
-
-CPDF_Type3Font::CPDF_Type3Font()
-    : m_pCharProcs(nullptr),
-      m_pPageResources(nullptr),
-      m_pFontResources(nullptr),
-      m_CharLoadingDepth(0) {
-  FXSYS_memset(m_CharWidthL, 0, sizeof(m_CharWidthL));
-}
-
-CPDF_Type3Font::~CPDF_Type3Font() {}
-
-bool CPDF_Type3Font::IsType3Font() const {
-  return true;
-}
-
-const CPDF_Type3Font* CPDF_Type3Font::AsType3Font() const {
-  return this;
-}
-
-CPDF_Type3Font* CPDF_Type3Font::AsType3Font() {
-  return this;
-}
-
-bool CPDF_Type3Font::Load() {
-  m_pFontResources = m_pFontDict->GetDictFor("Resources");
-  CPDF_Array* pMatrix = m_pFontDict->GetArrayFor("FontMatrix");
-  FX_FLOAT xscale = 1.0f, yscale = 1.0f;
-  if (pMatrix) {
-    m_FontMatrix = pMatrix->GetMatrix();
-    xscale = m_FontMatrix.a;
-    yscale = m_FontMatrix.d;
-  }
-  CPDF_Array* pBBox = m_pFontDict->GetArrayFor("FontBBox");
-  if (pBBox) {
-    m_FontBBox.left = (int32_t)(pBBox->GetNumberAt(0) * xscale * 1000);
-    m_FontBBox.bottom = (int32_t)(pBBox->GetNumberAt(1) * yscale * 1000);
-    m_FontBBox.right = (int32_t)(pBBox->GetNumberAt(2) * xscale * 1000);
-    m_FontBBox.top = (int32_t)(pBBox->GetNumberAt(3) * yscale * 1000);
-  }
-  int StartChar = m_pFontDict->GetIntegerFor("FirstChar");
-  CPDF_Array* pWidthArray = m_pFontDict->GetArrayFor("Widths");
-  if (pWidthArray && (StartChar >= 0 && StartChar < 256)) {
-    size_t count = pWidthArray->GetCount();
-    if (count > 256)
-      count = 256;
-    if (StartChar + count > 256)
-      count = 256 - StartChar;
-    for (size_t i = 0; i < count; i++) {
-      m_CharWidthL[StartChar + i] =
-          FXSYS_round(pWidthArray->GetNumberAt(i) * xscale * 1000);
-    }
-  }
-  m_pCharProcs = m_pFontDict->GetDictFor("CharProcs");
-  CPDF_Object* pEncoding = m_pFontDict->GetDirectObjectFor("Encoding");
-  if (pEncoding) {
-    LoadPDFEncoding(pEncoding, m_BaseEncoding, &m_CharNames, false, false);
-    if (!m_CharNames.empty()) {
-      for (int i = 0; i < 256; i++) {
-        m_Encoding.m_Unicodes[i] =
-            PDF_UnicodeFromAdobeName(m_CharNames[i].c_str());
-        if (m_Encoding.m_Unicodes[i] == 0) {
-          m_Encoding.m_Unicodes[i] = i;
-        }
-      }
-    }
-  }
-  return true;
-}
-
-void CPDF_Type3Font::CheckType3FontMetrics() {
-  CheckFontMetrics();
-}
-
-CPDF_Type3Char* CPDF_Type3Font::LoadChar(uint32_t charcode) {
-  if (m_CharLoadingDepth >= _FPDF_MAX_TYPE3_FORM_LEVEL_)
-    return nullptr;
-
-  auto it = m_CacheMap.find(charcode);
-  if (it != m_CacheMap.end())
-    return it->second.get();
-
-  const FX_CHAR* name = GetAdobeCharName(m_BaseEncoding, m_CharNames, charcode);
-  if (!name)
-    return nullptr;
-
-  CPDF_Stream* pStream =
-      ToStream(m_pCharProcs ? m_pCharProcs->GetDirectObjectFor(name) : nullptr);
-  if (!pStream)
-    return nullptr;
-
-  std::unique_ptr<CPDF_Type3Char> pNewChar(new CPDF_Type3Char(new CPDF_Form(
-      m_pDocument, m_pFontResources ? m_pFontResources : m_pPageResources,
-      pStream, nullptr)));
-
-  // This can trigger recursion into this method. The content of |m_CacheMap|
-  // can change as a result. Thus after it returns, check the cache again for
-  // a cache hit.
-  m_CharLoadingDepth++;
-  pNewChar->m_pForm->ParseContent(nullptr, nullptr, pNewChar.get());
-  m_CharLoadingDepth--;
-  it = m_CacheMap.find(charcode);
-  if (it != m_CacheMap.end())
-    return it->second.get();
-
-  FX_FLOAT scale = m_FontMatrix.GetXUnit();
-  pNewChar->m_Width = (int32_t)(pNewChar->m_Width * scale + 0.5f);
-  FX_RECT& rcBBox = pNewChar->m_BBox;
-  CFX_FloatRect char_rect(
-      (FX_FLOAT)rcBBox.left / 1000.0f, (FX_FLOAT)rcBBox.bottom / 1000.0f,
-      (FX_FLOAT)rcBBox.right / 1000.0f, (FX_FLOAT)rcBBox.top / 1000.0f);
-  if (rcBBox.right <= rcBBox.left || rcBBox.bottom >= rcBBox.top)
-    char_rect = pNewChar->m_pForm->CalcBoundingBox();
-
-  char_rect.Transform(&m_FontMatrix);
-  rcBBox.left = FXSYS_round(char_rect.left * 1000);
-  rcBBox.right = FXSYS_round(char_rect.right * 1000);
-  rcBBox.top = FXSYS_round(char_rect.top * 1000);
-  rcBBox.bottom = FXSYS_round(char_rect.bottom * 1000);
-
-  ASSERT(!pdfium::ContainsKey(m_CacheMap, charcode));
-  m_CacheMap[charcode] = std::move(pNewChar);
-  CPDF_Type3Char* pCachedChar = m_CacheMap[charcode].get();
-  if (pCachedChar->m_pForm->GetPageObjectList()->empty())
-    pCachedChar->m_pForm.reset();
-  return pCachedChar;
-}
-
-int CPDF_Type3Font::GetCharWidthF(uint32_t charcode) {
-  if (charcode >= FX_ArraySize(m_CharWidthL))
-    charcode = 0;
-
-  if (m_CharWidthL[charcode])
-    return m_CharWidthL[charcode];
-
-  const CPDF_Type3Char* pChar = LoadChar(charcode);
-  return pChar ? pChar->m_Width : 0;
-}
-
-FX_RECT CPDF_Type3Font::GetCharBBox(uint32_t charcode) {
-  const CPDF_Type3Char* pChar = LoadChar(charcode);
-  return pChar ? pChar->m_BBox : FX_RECT();
-}