Move CPDF_Type3Cache and CPDF_Type3Glyphs to their own files

core/fpdfapi/fpdf_render/fpdf_render_text.cpp

 // Copyright 2014 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/render_int.h"
 
 #include <vector>
 
 #include "core/fpdfapi/fpdf_font/cpdf_cidfont.h"
 #include "core/fpdfapi/fpdf_font/cpdf_type3char.h"
 #include "core/fpdfapi/fpdf_font/cpdf_type3font.h"
 #include "core/fpdfapi/fpdf_font/include/cpdf_font.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_form.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_imageobject.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_pageobject.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_pathobject.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_textobject.h"
 #include "core/fpdfapi/fpdf_page/pageint.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
+#include "core/fpdfapi/fpdf_render/cpdf_type3cache.h"
 #include "core/fpdfapi/fpdf_render/include/cpdf_renderoptions.h"
 #include "core/fpdfapi/fpdf_render/include/cpdf_textrenderer.h"
 #include "core/fxge/include/cfx_autofontcache.h"
 #include "core/fxge/include/cfx_facecache.h"
 #include "core/fxge/include/cfx_fontcache.h"
 #include "core/fxge/include/cfx_fxgedevice.h"
 #include "core/fxge/include/cfx_gemodule.h"
 #include "core/fxge/include/cfx_graphstatedata.h"
 #include "core/fxge/include/cfx_pathdata.h"
 #include "core/fxge/include/cfx_renderdevice.h"
 
-namespace {
-
-struct CPDF_UniqueKeyGen {
-  void Generate(int count, ...);
-  FX_CHAR m_Key[128];
-  int m_KeyLen;
-};
-
-void CPDF_UniqueKeyGen::Generate(int count, ...) {
-  va_list argList;
-  va_start(argList, count);
-  for (int i = 0; i < count; i++) {
-    int p = va_arg(argList, int);
-    ((uint32_t*)m_Key)[i] = p;
-  }
-  va_end(argList);
-  m_KeyLen = count * sizeof(uint32_t);
-}
-
-}  // namespace
-
-CPDF_Type3Cache::CPDF_Type3Cache(CPDF_Type3Font* pFont) : m_pFont(pFont) {}
-
-CPDF_Type3Cache::~CPDF_Type3Cache() {
-  for (const auto& pair : m_SizeMap) {
-    delete pair.second;
-  }
-  m_SizeMap.clear();
-}
-
-CFX_GlyphBitmap* CPDF_Type3Cache::LoadGlyph(uint32_t charcode,
-                                            const CFX_Matrix* pMatrix,
-                                            FX_FLOAT retinaScaleX,
-                                            FX_FLOAT retinaScaleY) {
-  CPDF_UniqueKeyGen keygen;
-  keygen.Generate(
-      4, FXSYS_round(pMatrix->a * 10000), FXSYS_round(pMatrix->b * 10000),
-      FXSYS_round(pMatrix->c * 10000), FXSYS_round(pMatrix->d * 10000));
-  CFX_ByteString FaceGlyphsKey(keygen.m_Key, keygen.m_KeyLen);
-  CPDF_Type3Glyphs* pSizeCache;
-  auto it = m_SizeMap.find(FaceGlyphsKey);
-  if (it == m_SizeMap.end()) {
-    pSizeCache = new CPDF_Type3Glyphs;
-    m_SizeMap[FaceGlyphsKey] = pSizeCache;
-  } else {
-    pSizeCache = it->second;
-  }
-  auto it2 = pSizeCache->m_GlyphMap.find(charcode);
-  if (it2 != pSizeCache->m_GlyphMap.end())
-    return it2->second;
-
-  CFX_GlyphBitmap* pGlyphBitmap =
-      RenderGlyph(pSizeCache, charcode, pMatrix, retinaScaleX, retinaScaleY);
-  pSizeCache->m_GlyphMap[charcode] = pGlyphBitmap;
-  return pGlyphBitmap;
-}
-
-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 * 1.0f;
-  int closest_pos = -1;
-  for (int i = 0; i < count; i++) {
-    FX_FLOAT distance = (FX_FLOAT)FXSYS_fabs(pos - (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);
-}
-
-static FX_BOOL _IsScanLine1bpp(uint8_t* pBuf, int width) {
-  int size = width / 8;
-  for (int i = 0; i < size; i++) {
-    if (pBuf[i])
-      return TRUE;
-  }
-  return (width % 8) && (pBuf[width / 8] & (0xff << (8 - width % 8)));
-}
-
-static FX_BOOL _IsScanLine8bpp(uint8_t* pBuf, int width) {
-  for (int i = 0; i < width; i++) {
-    if (pBuf[i] > 0x40)
-      return TRUE;
-  }
-  return FALSE;
-}
-
-static int _DetectFirstLastScan(const CFX_DIBitmap* pBitmap, FX_BOOL bFirst) {
-  int height = pBitmap->GetHeight(), pitch = pBitmap->GetPitch(),
-      width = pBitmap->GetWidth();
-  int bpp = pBitmap->GetBPP();
-  if (bpp > 8) {
-    width *= bpp / 8;
-  }
-  uint8_t* pBuf = pBitmap->GetBuffer();
-  int line = bFirst ? 0 : height - 1;
-  int line_step = bFirst ? 1 : -1;
-  int line_end = bFirst ? height : -1;
-  while (line != line_end) {
-    if (bpp == 1) {
-      if (_IsScanLine1bpp(pBuf + line * pitch, width)) {
-        return line;
-      }
-    } else {
-      if (_IsScanLine8bpp(pBuf + line * pitch, width)) {
-        return line;
-      }
-    }
-    line += line_step;
-  }
-  return -1;
-}
-
-CFX_GlyphBitmap* CPDF_Type3Cache::RenderGlyph(CPDF_Type3Glyphs* pSize,
-                                              uint32_t charcode,
-                                              const CFX_Matrix* pMatrix,
-                                              FX_FLOAT retinaScaleX,
-                                              FX_FLOAT retinaScaleY) {
-  const CPDF_Type3Char* pChar = m_pFont->LoadChar(charcode);
-  if (!pChar || !pChar->m_pBitmap)
-    return nullptr;
-
-  CFX_DIBitmap* pBitmap = pChar->m_pBitmap.get();
-  CFX_Matrix image_matrix, text_matrix;
-  image_matrix = pChar->m_ImageMatrix;
-  text_matrix.Set(pMatrix->a, pMatrix->b, pMatrix->c, pMatrix->d, 0, 0);
-  image_matrix.Concat(text_matrix);
-  std::unique_ptr<CFX_DIBitmap> pResBitmap;
-  int left = 0;
-  int top = 0;
-  if (FXSYS_fabs(image_matrix.b) < FXSYS_fabs(image_matrix.a) / 100 &&
-      FXSYS_fabs(image_matrix.c) < FXSYS_fabs(image_matrix.d) / 100) {
-    int top_line = _DetectFirstLastScan(pBitmap, TRUE);
-    int bottom_line = _DetectFirstLastScan(pBitmap, FALSE);
-    if (top_line == 0 && bottom_line == pBitmap->GetHeight() - 1) {
-      FX_FLOAT top_y = image_matrix.d + image_matrix.f;
-      FX_FLOAT bottom_y = image_matrix.f;
-      FX_BOOL bFlipped = top_y > bottom_y;
-      if (bFlipped) {
-        FX_FLOAT temp = top_y;
-        top_y = bottom_y;
-        bottom_y = temp;
-      }
-      pSize->AdjustBlue(top_y, bottom_y, top_line, bottom_line);
-      pResBitmap.reset(pBitmap->StretchTo(
-          (int)(FXSYS_round(image_matrix.a) * retinaScaleX),
-          (int)((bFlipped ? top_line - bottom_line : bottom_line - top_line) *
-                retinaScaleY)));
-      top = top_line;
-      if (image_matrix.a < 0) {
-        image_matrix.Scale(retinaScaleX, retinaScaleY);
-        left = FXSYS_round(image_matrix.e + image_matrix.a);
-      } else {
-        left = FXSYS_round(image_matrix.e);
-      }
-    }
-  }
-  if (!pResBitmap) {
-    image_matrix.Scale(retinaScaleX, retinaScaleY);
-    pResBitmap.reset(pBitmap->TransformTo(&image_matrix, left, top));
-  }
-  if (!pResBitmap)
-    return nullptr;
-
-  CFX_GlyphBitmap* pGlyph = new CFX_GlyphBitmap;
-  pGlyph->m_Left = left;
-  pGlyph->m_Top = -top;
-  pGlyph->m_Bitmap.TakeOver(pResBitmap.get());
-  return pGlyph;
-}
-
 FX_BOOL CPDF_RenderStatus::ProcessText(const CPDF_TextObject* textobj,
                                        const CFX_Matrix* pObj2Device,
                                        CFX_PathData* pClippingPath) {
   if (textobj->m_nChars == 0)
     return TRUE;
 
   const TextRenderingMode text_render_mode = textobj->m_TextState.GetTextMode();
   if (text_render_mode == TextRenderingMode::MODE_INVISIBLE)
     return TRUE;
 
@@ skipping 626 matching lines @@
     matrix.Concat(font_size, 0, 0, font_size, charpos.m_OriginX,
                   charpos.m_OriginY);
     path.m_Path.Emplace()->Append(pPath, &matrix);
     path.m_Matrix = *pTextMatrix;
     path.m_bStroke = bStroke;
     path.m_FillType = bFill ? FXFILL_WINDING : 0;
     path.CalcBoundingBox();
     ProcessPath(&path, pObj2Device);
   }
 }