Move CFX_Font definition to its own file

core/fxge/ge/fx_ge_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 <algorithm>
 #include <limits>
 #include <vector>
 
@@ skipping 86 matching lines @@
 
 CFX_SizeGlyphCache::CFX_SizeGlyphCache() {}
 
 CFX_SizeGlyphCache::~CFX_SizeGlyphCache() {
   for (const auto& pair : m_GlyphMap) {
     delete pair.second;
   }
   m_GlyphMap.clear();
 }
 
-#define CONTRAST_RAMP_STEP 1
-void CFX_Font::AdjustMMParams(int glyph_index, int dest_width, int weight) {
-  FXFT_MM_Var pMasters = nullptr;
-  FXFT_Get_MM_Var(m_Face, &pMasters);
-  if (!pMasters) {
-    return;
-  }
-  long coords[2];
-  if (weight == 0) {
-    coords[0] = FXFT_Get_MM_Axis_Def(FXFT_Get_MM_Axis(pMasters, 0)) / 65536;
-  } else {
-    coords[0] = weight;
-  }
-  if (dest_width == 0) {
-    coords[1] = FXFT_Get_MM_Axis_Def(FXFT_Get_MM_Axis(pMasters, 1)) / 65536;
-  } else {
-    int min_param = FXFT_Get_MM_Axis_Min(FXFT_Get_MM_Axis(pMasters, 1)) / 65536;
-    int max_param = FXFT_Get_MM_Axis_Max(FXFT_Get_MM_Axis(pMasters, 1)) / 65536;
-    coords[1] = min_param;
-    (void)FXFT_Set_MM_Design_Coordinates(m_Face, 2, coords);
-    (void)FXFT_Load_Glyph(
-        m_Face, glyph_index,
-        FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);
-    int min_width = FXFT_Get_Glyph_HoriAdvance(m_Face) * 1000 /
-                    FXFT_Get_Face_UnitsPerEM(m_Face);
-    coords[1] = max_param;
-    (void)FXFT_Set_MM_Design_Coordinates(m_Face, 2, coords);
-    (void)FXFT_Load_Glyph(
-        m_Face, glyph_index,
-        FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);
-    int max_width = FXFT_Get_Glyph_HoriAdvance(m_Face) * 1000 /
-                    FXFT_Get_Face_UnitsPerEM(m_Face);
-    if (max_width == min_width) {
-      FXFT_Free(m_Face, pMasters);
-      return;
-    }
-    int param = min_param +
-                (max_param - min_param) * (dest_width - min_width) /
-                    (max_width - min_width);
-    coords[1] = param;
-  }
-  FXFT_Free(m_Face, pMasters);
-  FXFT_Set_MM_Design_Coordinates(m_Face, 2, coords);
-}
-const char CFX_Font::s_AngleSkew[] = {
-    0,  2,  3,  5,  7,  9,  11, 12, 14, 16, 18, 19, 21, 23, 25,
-    27, 29, 31, 32, 34, 36, 38, 40, 42, 45, 47, 49, 51, 53, 55,
-};
-const uint8_t CFX_Font::s_WeightPow[] = {
-    0,  3,  6,  7,  8,  9,  11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22,
-    23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 35, 36, 36, 37,
-    37, 37, 38, 38, 38, 39, 39, 39, 40, 40, 40, 41, 41, 41, 42, 42, 42,
-    42, 43, 43, 43, 44, 44, 44, 44, 45, 45, 45, 45, 46, 46, 46, 46, 47,
-    47, 47, 47, 48, 48, 48, 48, 48, 49, 49, 49, 49, 50, 50, 50, 50, 50,
-    51, 51, 51, 51, 51, 52, 52, 52, 52, 52, 53, 53, 53, 53, 53,
-};
-const uint8_t CFX_Font::s_WeightPow_11[] = {
-    0,  4,  7,  8,  9,  10, 12, 13, 15, 17, 18, 19, 20, 21, 22, 23, 24,
-    25, 26, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 39, 39, 40, 40, 41,
-    41, 41, 42, 42, 42, 43, 43, 43, 44, 44, 44, 45, 45, 45, 46, 46, 46,
-    46, 43, 47, 47, 48, 48, 48, 48, 45, 50, 50, 50, 46, 51, 51, 51, 52,
-    52, 52, 52, 53, 53, 53, 53, 53, 54, 54, 54, 54, 55, 55, 55, 55, 55,
-    56, 56, 56, 56, 56, 57, 57, 57, 57, 57, 58, 58, 58, 58, 58,
-};
-const uint8_t CFX_Font::s_WeightPow_SHIFTJIS[] = {
-    0,  0,  1,  2,  3,  4,  5,  7,  8,  10, 11, 13, 14, 16, 17, 19, 21,
-    22, 24, 26, 28, 30, 32, 33, 35, 37, 39, 41, 43, 45, 48, 48, 48, 48,
-    49, 49, 49, 50, 50, 50, 50, 51, 51, 51, 51, 52, 52, 52, 52, 52, 53,
-    53, 53, 53, 53, 54, 54, 54, 54, 54, 55, 55, 55, 55, 55, 56, 56, 56,
-    56, 56, 56, 57, 57, 57, 57, 57, 57, 57, 58, 58, 58, 58, 58, 58, 58,
-    59, 59, 59, 59, 59, 59, 59, 60, 60, 60, 60, 60, 60, 60, 60,
-};
-typedef struct {
-  FX_BOOL m_bCount;
-  int m_PointCount;
-  FX_PATHPOINT* m_pPoints;
-  int m_CurX;
-  int m_CurY;
-  FX_FLOAT m_CoordUnit;
-} OUTLINE_PARAMS;
-void _Outline_CheckEmptyContour(OUTLINE_PARAMS* param) {
-  if (param->m_PointCount >= 2 &&
-      param->m_pPoints[param->m_PointCount - 2].m_Flag == FXPT_MOVETO &&
-      param->m_pPoints[param->m_PointCount - 2].m_PointX ==
-          param->m_pPoints[param->m_PointCount - 1].m_PointX &&
-      param->m_pPoints[param->m_PointCount - 2].m_PointY ==
-          param->m_pPoints[param->m_PointCount - 1].m_PointY) {
-    param->m_PointCount -= 2;
-  }
-  if (param->m_PointCount >= 4 &&
-      param->m_pPoints[param->m_PointCount - 4].m_Flag == FXPT_MOVETO &&
-      param->m_pPoints[param->m_PointCount - 3].m_Flag == FXPT_BEZIERTO &&
-      param->m_pPoints[param->m_PointCount - 3].m_PointX ==
-          param->m_pPoints[param->m_PointCount - 4].m_PointX &&
-      param->m_pPoints[param->m_PointCount - 3].m_PointY ==
-          param->m_pPoints[param->m_PointCount - 4].m_PointY &&
-      param->m_pPoints[param->m_PointCount - 2].m_PointX ==
-          param->m_pPoints[param->m_PointCount - 4].m_PointX &&
-      param->m_pPoints[param->m_PointCount - 2].m_PointY ==
-          param->m_pPoints[param->m_PointCount - 4].m_PointY &&
-      param->m_pPoints[param->m_PointCount - 1].m_PointX ==
-          param->m_pPoints[param->m_PointCount - 4].m_PointX &&
-      param->m_pPoints[param->m_PointCount - 1].m_PointY ==
-          param->m_pPoints[param->m_PointCount - 4].m_PointY) {
-    param->m_PointCount -= 4;
-  }
-}
-extern "C" {
-static int _Outline_MoveTo(const FXFT_Vector* to, void* user) {
-  OUTLINE_PARAMS* param = (OUTLINE_PARAMS*)user;
-  if (!param->m_bCount) {
-    _Outline_CheckEmptyContour(param);
-    param->m_pPoints[param->m_PointCount].m_PointX = to->x / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount].m_PointY = to->y / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount].m_Flag = FXPT_MOVETO;
-    param->m_CurX = to->x;
-    param->m_CurY = to->y;
-    if (param->m_PointCount) {
-      param->m_pPoints[param->m_PointCount - 1].m_Flag |= FXPT_CLOSEFIGURE;
-    }
-  }
-  param->m_PointCount++;
-  return 0;
-}
-};
-extern "C" {
-static int _Outline_LineTo(const FXFT_Vector* to, void* user) {
-  OUTLINE_PARAMS* param = (OUTLINE_PARAMS*)user;
-  if (!param->m_bCount) {
-    param->m_pPoints[param->m_PointCount].m_PointX = to->x / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount].m_PointY = to->y / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount].m_Flag = FXPT_LINETO;
-    param->m_CurX = to->x;
-    param->m_CurY = to->y;
-  }
-  param->m_PointCount++;
-  return 0;
-}
-};
-extern "C" {
-static int _Outline_ConicTo(const FXFT_Vector* control,
-                            const FXFT_Vector* to,
-                            void* user) {
-  OUTLINE_PARAMS* param = (OUTLINE_PARAMS*)user;
-  if (!param->m_bCount) {
-    param->m_pPoints[param->m_PointCount].m_PointX =
-        (param->m_CurX + (control->x - param->m_CurX) * 2 / 3) /
-        param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount].m_PointY =
-        (param->m_CurY + (control->y - param->m_CurY) * 2 / 3) /
-        param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount].m_Flag = FXPT_BEZIERTO;
-    param->m_pPoints[param->m_PointCount + 1].m_PointX =
-        (control->x + (to->x - control->x) / 3) / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount + 1].m_PointY =
-        (control->y + (to->y - control->y) / 3) / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount + 1].m_Flag = FXPT_BEZIERTO;
-    param->m_pPoints[param->m_PointCount + 2].m_PointX =
-        to->x / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount + 2].m_PointY =
-        to->y / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount + 2].m_Flag = FXPT_BEZIERTO;
-    param->m_CurX = to->x;
-    param->m_CurY = to->y;
-  }
-  param->m_PointCount += 3;
-  return 0;
-}
-};
-extern "C" {
-static int _Outline_CubicTo(const FXFT_Vector* control1,
-                            const FXFT_Vector* control2,
-                            const FXFT_Vector* to,
-                            void* user) {
-  OUTLINE_PARAMS* param = (OUTLINE_PARAMS*)user;
-  if (!param->m_bCount) {
-    param->m_pPoints[param->m_PointCount].m_PointX =
-        control1->x / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount].m_PointY =
-        control1->y / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount].m_Flag = FXPT_BEZIERTO;
-    param->m_pPoints[param->m_PointCount + 1].m_PointX =
-        control2->x / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount + 1].m_PointY =
-        control2->y / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount + 1].m_Flag = FXPT_BEZIERTO;
-    param->m_pPoints[param->m_PointCount + 2].m_PointX =
-        to->x / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount + 2].m_PointY =
-        to->y / param->m_CoordUnit;
-    param->m_pPoints[param->m_PointCount + 2].m_Flag = FXPT_BEZIERTO;
-    param->m_CurX = to->x;
-    param->m_CurY = to->y;
-  }
-  param->m_PointCount += 3;
-  return 0;
-}
-};
-CFX_PathData* CFX_Font::LoadGlyphPath(uint32_t glyph_index, int dest_width) {
-  if (!m_Face) {
-    return nullptr;
-  }
-  FXFT_Set_Pixel_Sizes(m_Face, 0, 64);
-  FXFT_Matrix ft_matrix = {65536, 0, 0, 65536};
-  if (m_pSubstFont) {
-    if (m_pSubstFont->m_ItalicAngle) {
-      int skew = m_pSubstFont->m_ItalicAngle;
-      // |skew| is nonpositive so |-skew| is used as the index. We need to make
-      // sure |skew| != INT_MIN since -INT_MIN is undefined.
-      if (skew <= 0 && skew != std::numeric_limits<int>::min() &&
-          static_cast<size_t>(-skew) < kAngleSkewArraySize) {
-        skew = -s_AngleSkew[-skew];
-      } else {
-        skew = -58;
-      }
-      if (m_bVertical)
-        ft_matrix.yx += ft_matrix.yy * skew / 100;
-      else
-        ft_matrix.xy -= ft_matrix.xx * skew / 100;
-    }
-    if (m_pSubstFont->m_SubstFlags & FXFONT_SUBST_MM) {
-      AdjustMMParams(glyph_index, dest_width, m_pSubstFont->m_Weight);
-    }
-  }
-  ScopedFontTransform scoped_transform(m_Face, &ft_matrix);
-  int load_flags = FXFT_LOAD_NO_BITMAP;
-  if (!(m_Face->face_flags & FT_FACE_FLAG_SFNT) || !FT_IS_TRICKY(m_Face)) {
-    load_flags |= FT_LOAD_NO_HINTING;
-  }
-  if (FXFT_Load_Glyph(m_Face, glyph_index, load_flags))
-    return nullptr;
-  if (m_pSubstFont && !(m_pSubstFont->m_SubstFlags & FXFONT_SUBST_MM) &&
-      m_pSubstFont->m_Weight > 400) {
-    uint32_t index = (m_pSubstFont->m_Weight - 400) / 10;
-    index = std::min(index, static_cast<uint32_t>(kWeightPowArraySize - 1));
-    int level = 0;
-    if (m_pSubstFont->m_Charset == FXFONT_SHIFTJIS_CHARSET)
-      level = s_WeightPow_SHIFTJIS[index] * 2 * 65536 / 36655;
-    else
-      level = s_WeightPow[index] * 2;
-    FXFT_Outline_Embolden(FXFT_Get_Glyph_Outline(m_Face), level);
-  }
-  FXFT_Outline_Funcs funcs;
-  funcs.move_to = _Outline_MoveTo;
-  funcs.line_to = _Outline_LineTo;
-  funcs.conic_to = _Outline_ConicTo;
-  funcs.cubic_to = _Outline_CubicTo;
-  funcs.shift = 0;
-  funcs.delta = 0;
-  OUTLINE_PARAMS params;
-  params.m_bCount = TRUE;
-  params.m_PointCount = 0;
-  FXFT_Outline_Decompose(FXFT_Get_Glyph_Outline(m_Face), &funcs, &params);
-  if (params.m_PointCount == 0) {
-    return nullptr;
-  }
-  CFX_PathData* pPath = new CFX_PathData;
-  pPath->SetPointCount(params.m_PointCount);
-  params.m_bCount = FALSE;
-  params.m_PointCount = 0;
-  params.m_pPoints = pPath->GetPoints();
-  params.m_CurX = params.m_CurY = 0;
-  params.m_CoordUnit = 64 * 64.0;
-  FXFT_Outline_Decompose(FXFT_Get_Glyph_Outline(m_Face), &funcs, &params);
-  _Outline_CheckEmptyContour(&params);
-  pPath->TrimPoints(params.m_PointCount);
-  if (params.m_PointCount) {
-    pPath->GetPoints()[params.m_PointCount - 1].m_Flag |= FXPT_CLOSEFIGURE;
-  }
-  return pPath;
-}
 void _CFX_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);
 }