Move core/fxge/ge to core/fxge.

This brings the cpp and h files together and removes the
redundant ge/ path.

Change-Id: I36594b8ae719d362768ba4c2e4ce173e287363eb
Reviewed-on: https://pdfium-review.googlesource.com/7452
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

1 files changed, 401 insertions, 0 deletions

diff --git a/core/fxge/cfx_facecache.cpp b/core/fxge/cfx_facecache.cpp
new file mode 100644
index 0000000000..eac28074fc
--- /dev/null
+++ b/core/fxge/cfx_facecache.cpp
@@ -0,0 +1,401 @@
+// 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/fxge/cfx_facecache.h"
+
+#include <algorithm>
+#include <limits>
+#include <memory>
+#include <utility>
+
+#include "core/fxcrt/fx_codepage.h"
+#include "core/fxge/cfx_fontmgr.h"
+#include "core/fxge/cfx_gemodule.h"
+#include "core/fxge/cfx_pathdata.h"
+#include "core/fxge/cfx_substfont.h"
+#include "core/fxge/fx_freetype.h"
+#include "core/fxge/fx_text_int.h"
+#include "third_party/base/numerics/safe_math.h"
+#include "third_party/base/ptr_util.h"
+
+#if defined _SKIA_SUPPORT_ || _SKIA_SUPPORT_PATHS_
+#include "third_party/skia/include/core/SkStream.h"
+#include "third_party/skia/include/core/SkTypeface.h"
+
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+#include "third_party/skia/include/ports/SkFontMgr.h"
+#include "third_party/skia/include/ports/SkFontMgr_empty.h"
+#endif
+#endif
+
+namespace {
+
+constexpr uint32_t kInvalidGlyphIndex = static_cast<uint32_t>(-1);
+
+constexpr int kMinPixel = 0;
+constexpr int kMaxPixel = 255;
+
+constexpr int kMaxGlyphDimension = 2048;
+
+void ContrastAdjust(uint8_t* pDataIn,
+                    uint8_t* pDataOut,
+                    int nWidth,
+                    int nHeight,
+                    int nSrcRowBytes,
+                    int nDstRowBytes) {
+  int max = kMinPixel;
+  int min = kMaxPixel;
+  for (int row = 0; row < nHeight; row++) {
+    uint8_t* pRow = pDataIn + row * nSrcRowBytes;
+    for (int col = 0; col < nWidth; col++) {
+      int val = pRow[col];
+      max = std::max(val, max);
+      min = std::min(val, min);
+    }
+  }
+  int diff = max - min;
+  if (diff == kMinPixel || diff == kMaxPixel) {
+    int rowbytes = std::min(abs(nSrcRowBytes), nDstRowBytes);
+    for (int row = 0; row < nHeight; row++) {
+      memcpy(pDataOut + row * nDstRowBytes, pDataIn + row * nSrcRowBytes,
+             rowbytes);
+    }
+    return;
+  }
+  float rate = 255.f / diff;
+  for (int row = 0; row < nHeight; row++) {
+    uint8_t* pSrcRow = pDataIn + row * nSrcRowBytes;
+    uint8_t* pDstRow = pDataOut + row * nDstRowBytes;
+    for (int col = 0; col < nWidth; col++) {
+      int val = static_cast<int>((pSrcRow[col] - min) * rate + 0.5);
+      pDstRow[col] =
+          static_cast<uint8_t>(pdfium::clamp(val, kMinPixel, kMaxPixel));
+    }
+  }
+}
+
+}  // namespace
+
+CFX_FaceCache::CFX_FaceCache(FXFT_Face face)
+    : m_Face(face)
+#if defined _SKIA_SUPPORT_ || _SKIA_SUPPORT_PATHS_
+      ,
+      m_pTypeface(nullptr)
+#endif
+{
+}
+
+CFX_FaceCache::~CFX_FaceCache() {}
+
+std::unique_ptr<CFX_GlyphBitmap> CFX_FaceCache::RenderGlyph(
+    const CFX_Font* pFont,
+    uint32_t glyph_index,
+    bool bFontStyle,
+    const CFX_Matrix* pMatrix,
+    int dest_width,
+    int anti_alias) {
+  if (!m_Face)
+    return nullptr;
+
+  FXFT_Matrix ft_matrix;
+  ft_matrix.xx = (signed long)(pMatrix->a / 64 * 65536);
+  ft_matrix.xy = (signed long)(pMatrix->c / 64 * 65536);
+  ft_matrix.yx = (signed long)(pMatrix->b / 64 * 65536);
+  ft_matrix.yy = (signed long)(pMatrix->d / 64 * 65536);
+  bool bUseCJKSubFont = false;
+  const CFX_SubstFont* pSubstFont = pFont->GetSubstFont();
+  if (pSubstFont) {
+    bUseCJKSubFont = pSubstFont->m_bSubstCJK && bFontStyle;
+    int skew = 0;
+    if (bUseCJKSubFont)
+      skew = pSubstFont->m_bItalicCJK ? -15 : 0;
+    else
+      skew = pSubstFont->m_ItalicAngle;
+    if (skew) {
+      // |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) < CFX_Font::kAngleSkewArraySize) {
+        skew = -CFX_Font::s_AngleSkew[-skew];
+      } else {
+        skew = -58;
+      }
+      if (pFont->IsVertical())
+        ft_matrix.yx += ft_matrix.yy * skew / 100;
+      else
+        ft_matrix.xy -= ft_matrix.xx * skew / 100;
+    }
+    if (pSubstFont->m_SubstFlags & FXFONT_SUBST_MM) {
+      pFont->AdjustMMParams(glyph_index, dest_width,
+                            pFont->GetSubstFont()->m_Weight);
+    }
+  }
+  ScopedFontTransform scoped_transform(m_Face, &ft_matrix);
+  int load_flags = (m_Face->face_flags & FT_FACE_FLAG_SFNT)
+                       ? FXFT_LOAD_NO_BITMAP
+                       : (FXFT_LOAD_NO_BITMAP | FT_LOAD_NO_HINTING);
+  int error = FXFT_Load_Glyph(m_Face, glyph_index, load_flags);
+  if (error) {
+    // if an error is returned, try to reload glyphs without hinting.
+    if (load_flags & FT_LOAD_NO_HINTING || load_flags & FT_LOAD_NO_SCALE)
+      return nullptr;
+
+    load_flags |= FT_LOAD_NO_HINTING;
+    error = FXFT_Load_Glyph(m_Face, glyph_index, load_flags);
+
+    if (error)
+      return nullptr;
+  }
+  int weight = 0;
+  if (bUseCJKSubFont)
+    weight = pSubstFont->m_WeightCJK;
+  else
+    weight = pSubstFont ? pSubstFont->m_Weight : 0;
+  if (pSubstFont && !(pSubstFont->m_SubstFlags & FXFONT_SUBST_MM) &&
+      weight > 400) {
+    uint32_t index = (weight - 400) / 10;
+    if (index >= CFX_Font::kWeightPowArraySize)
+      return nullptr;
+    pdfium::base::CheckedNumeric<signed long> level = 0;
+    if (pSubstFont->m_Charset == FX_CHARSET_ShiftJIS)
+      level = CFX_Font::s_WeightPow_SHIFTJIS[index] * 2;
+    else
+      level = CFX_Font::s_WeightPow_11[index];
+
+    level = level *
+            (abs(static_cast<int>(ft_matrix.xx)) +
+             abs(static_cast<int>(ft_matrix.xy))) /
+            36655;
+    FXFT_Outline_Embolden(FXFT_Get_Glyph_Outline(m_Face),
+                          level.ValueOrDefault(0));
+  }
+  FXFT_Library_SetLcdFilter(CFX_GEModule::Get()->GetFontMgr()->GetFTLibrary(),
+                            FT_LCD_FILTER_DEFAULT);
+  error = FXFT_Render_Glyph(m_Face, anti_alias);
+  if (error)
+    return nullptr;
+  int bmwidth = FXFT_Get_Bitmap_Width(FXFT_Get_Glyph_Bitmap(m_Face));
+  int bmheight = FXFT_Get_Bitmap_Rows(FXFT_Get_Glyph_Bitmap(m_Face));
+  if (bmwidth > kMaxGlyphDimension || bmheight > kMaxGlyphDimension)
+    return nullptr;
+  int dib_width = bmwidth;
+  auto pGlyphBitmap = pdfium::MakeUnique<CFX_GlyphBitmap>();
+  pGlyphBitmap->m_pBitmap->Create(
+      dib_width, bmheight,
+      anti_alias == FXFT_RENDER_MODE_MONO ? FXDIB_1bppMask : FXDIB_8bppMask);
+  pGlyphBitmap->m_Left = FXFT_Get_Glyph_BitmapLeft(m_Face);
+  pGlyphBitmap->m_Top = FXFT_Get_Glyph_BitmapTop(m_Face);
+  int dest_pitch = pGlyphBitmap->m_pBitmap->GetPitch();
+  int src_pitch = FXFT_Get_Bitmap_Pitch(FXFT_Get_Glyph_Bitmap(m_Face));
+  uint8_t* pDestBuf = pGlyphBitmap->m_pBitmap->GetBuffer();
+  uint8_t* pSrcBuf =
+      (uint8_t*)FXFT_Get_Bitmap_Buffer(FXFT_Get_Glyph_Bitmap(m_Face));
+  if (anti_alias != FXFT_RENDER_MODE_MONO &&
+      FXFT_Get_Bitmap_PixelMode(FXFT_Get_Glyph_Bitmap(m_Face)) ==
+          FXFT_PIXEL_MODE_MONO) {
+    int bytes = anti_alias == FXFT_RENDER_MODE_LCD ? 3 : 1;
+    for (int i = 0; i < bmheight; i++) {
+      for (int n = 0; n < bmwidth; n++) {
+        uint8_t data =
+            (pSrcBuf[i * src_pitch + n / 8] & (0x80 >> (n % 8))) ? 255 : 0;
+        for (int b = 0; b < bytes; b++)
+          pDestBuf[i * dest_pitch + n * bytes + b] = data;
+      }
+    }
+  } else {
+    memset(pDestBuf, 0, dest_pitch * bmheight);
+    if (anti_alias == FXFT_RENDER_MODE_MONO &&
+        FXFT_Get_Bitmap_PixelMode(FXFT_Get_Glyph_Bitmap(m_Face)) ==
+            FXFT_PIXEL_MODE_MONO) {
+      int rowbytes = abs(src_pitch) > dest_pitch ? dest_pitch : abs(src_pitch);
+      for (int row = 0; row < bmheight; row++) {
+        memcpy(pDestBuf + row * dest_pitch, pSrcBuf + row * src_pitch,
+               rowbytes);
+      }
+    } else {
+      ContrastAdjust(pSrcBuf, pDestBuf, bmwidth, bmheight, src_pitch,
+                     dest_pitch);
+    }
+  }
+  return pGlyphBitmap;
+}
+
+const CFX_PathData* CFX_FaceCache::LoadGlyphPath(const CFX_Font* pFont,
+                                                 uint32_t glyph_index,
+                                                 int dest_width) {
+  if (!m_Face || glyph_index == kInvalidGlyphIndex || dest_width < 0)
+    return nullptr;
+
+  uint32_t key = glyph_index;
+  auto* pSubstFont = pFont->GetSubstFont();
+  if (pSubstFont) {
+    if (pSubstFont->m_Weight < 0 || pSubstFont->m_ItalicAngle < 0)
+      return nullptr;
+    uint32_t weight = static_cast<uint32_t>(pSubstFont->m_Weight);
+    uint32_t angle = static_cast<uint32_t>(pSubstFont->m_ItalicAngle);
+    uint32_t key_modifier = (weight / 16) << 15;
+    key_modifier += (angle / 2) << 21;
+    key_modifier += (static_cast<uint32_t>(dest_width) / 16) << 25;
+    if (pFont->IsVertical())
+      key_modifier += 1U << 31;
+    key += key_modifier;
+  }
+  auto it = m_PathMap.find(key);
+  if (it != m_PathMap.end())
+    return it->second.get();
+
+  CFX_PathData* pGlyphPath = pFont->LoadGlyphPathImpl(glyph_index, dest_width);
+  m_PathMap[key] = std::unique_ptr<CFX_PathData>(pGlyphPath);
+  return pGlyphPath;
+}
+
+const CFX_GlyphBitmap* CFX_FaceCache::LoadGlyphBitmap(const CFX_Font* pFont,
+                                                      uint32_t glyph_index,
+                                                      bool bFontStyle,
+                                                      const CFX_Matrix* pMatrix,
+                                                      int dest_width,
+                                                      int anti_alias,
+                                                      int& text_flags) {
+  if (glyph_index == kInvalidGlyphIndex)
+    return nullptr;
+
+  CFX_UniqueKeyGen keygen;
+  int nMatrixA = static_cast<int>(pMatrix->a * 10000);
+  int nMatrixB = static_cast<int>(pMatrix->b * 10000);
+  int nMatrixC = static_cast<int>(pMatrix->c * 10000);
+  int nMatrixD = static_cast<int>(pMatrix->d * 10000);
+#if _FXM_PLATFORM_ != _FXM_PLATFORM_APPLE_
+  if (pFont->GetSubstFont()) {
+    keygen.Generate(9, nMatrixA, nMatrixB, nMatrixC, nMatrixD, dest_width,
+                    anti_alias, pFont->GetSubstFont()->m_Weight,
+                    pFont->GetSubstFont()->m_ItalicAngle, pFont->IsVertical());
+  } else {
+    keygen.Generate(6, nMatrixA, nMatrixB, nMatrixC, nMatrixD, dest_width,
+                    anti_alias);
+  }
+#else
+  if (text_flags & FXTEXT_NO_NATIVETEXT) {
+    if (pFont->GetSubstFont()) {
+      keygen.Generate(9, nMatrixA, nMatrixB, nMatrixC, nMatrixD, dest_width,
+                      anti_alias, pFont->GetSubstFont()->m_Weight,
+                      pFont->GetSubstFont()->m_ItalicAngle,
+                      pFont->IsVertical());
+    } else {
+      keygen.Generate(6, nMatrixA, nMatrixB, nMatrixC, nMatrixD, dest_width,
+                      anti_alias);
+    }
+  } else {
+    if (pFont->GetSubstFont()) {
+      keygen.Generate(10, nMatrixA, nMatrixB, nMatrixC, nMatrixD, dest_width,
+                      anti_alias, pFont->GetSubstFont()->m_Weight,
+                      pFont->GetSubstFont()->m_ItalicAngle, pFont->IsVertical(),
+                      3);
+    } else {
+      keygen.Generate(7, nMatrixA, nMatrixB, nMatrixC, nMatrixD, dest_width,
+                      anti_alias, 3);
+    }
+  }
+#endif
+  CFX_ByteString FaceGlyphsKey(keygen.m_Key, keygen.m_KeyLen);
+#if _FXM_PLATFORM_ != _FXM_PLATFORM_APPLE_ || defined _SKIA_SUPPORT_ || \
+    defined _SKIA_SUPPORT_PATHS_
+  return LookUpGlyphBitmap(pFont, pMatrix, FaceGlyphsKey, glyph_index,
+                           bFontStyle, dest_width, anti_alias);
+#else
+  if (text_flags & FXTEXT_NO_NATIVETEXT) {
+    return LookUpGlyphBitmap(pFont, pMatrix, FaceGlyphsKey, glyph_index,
+                             bFontStyle, dest_width, anti_alias);
+  }
+  std::unique_ptr<CFX_GlyphBitmap> pGlyphBitmap;
+  auto it = m_SizeMap.find(FaceGlyphsKey);
+  if (it != m_SizeMap.end()) {
+    CFX_SizeGlyphCache* pSizeCache = it->second.get();
+    auto it2 = pSizeCache->m_GlyphMap.find(glyph_index);
+    if (it2 != pSizeCache->m_GlyphMap.end())
+      return it2->second.get();
+
+    pGlyphBitmap = RenderGlyph_Nativetext(pFont, glyph_index, pMatrix,
+                                          dest_width, anti_alias);
+    if (pGlyphBitmap) {
+      CFX_GlyphBitmap* pResult = pGlyphBitmap.get();
+      pSizeCache->m_GlyphMap[glyph_index] = std::move(pGlyphBitmap);
+      return pResult;
+    }
+  } else {
+    pGlyphBitmap = RenderGlyph_Nativetext(pFont, glyph_index, pMatrix,
+                                          dest_width, anti_alias);
+    if (pGlyphBitmap) {
+      auto pNewCache = pdfium::MakeUnique<CFX_SizeGlyphCache>();
+      CFX_SizeGlyphCache* pSizeCache = pNewCache.get();
+      m_SizeMap[FaceGlyphsKey] = std::move(pNewCache);
+      CFX_GlyphBitmap* pResult = pGlyphBitmap.get();
+      pSizeCache->m_GlyphMap[glyph_index] = std::move(pGlyphBitmap);
+      return pResult;
+    }
+  }
+  if (pFont->GetSubstFont()) {
+    keygen.Generate(9, nMatrixA, nMatrixB, nMatrixC, nMatrixD, dest_width,
+                    anti_alias, pFont->GetSubstFont()->m_Weight,
+                    pFont->GetSubstFont()->m_ItalicAngle, pFont->IsVertical());
+  } else {
+    keygen.Generate(6, nMatrixA, nMatrixB, nMatrixC, nMatrixD, dest_width,
+                    anti_alias);
+  }
+  CFX_ByteString FaceGlyphsKey2(keygen.m_Key, keygen.m_KeyLen);
+  text_flags |= FXTEXT_NO_NATIVETEXT;
+  return LookUpGlyphBitmap(pFont, pMatrix, FaceGlyphsKey2, glyph_index,
+                           bFontStyle, dest_width, anti_alias);
+#endif
+}
+
+#if defined _SKIA_SUPPORT_ || defined _SKIA_SUPPORT_PATHS_
+CFX_TypeFace* CFX_FaceCache::GetDeviceCache(const CFX_Font* pFont) {
+  if (!m_pTypeface) {
+    m_pTypeface = SkTypeface::MakeFromStream(
+        new SkMemoryStream(pFont->GetFontData(), pFont->GetSize()));
+  }
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
+  if (!m_pTypeface) {
+    sk_sp<SkFontMgr> customMgr(SkFontMgr_New_Custom_Empty());
+    m_pTypeface.reset(customMgr->createFromStream(
+        new SkMemoryStream(pFont->GetFontData(), pFont->GetSize())));
+  }
+#endif
+  return m_pTypeface.get();
+}
+#endif
+
+#if _FXM_PLATFORM_ != _FXM_PLATFORM_APPLE_
+void CFX_FaceCache::InitPlatform() {}
+#endif
+
+CFX_GlyphBitmap* CFX_FaceCache::LookUpGlyphBitmap(
+    const CFX_Font* pFont,
+    const CFX_Matrix* pMatrix,
+    const CFX_ByteString& FaceGlyphsKey,
+    uint32_t glyph_index,
+    bool bFontStyle,
+    int dest_width,
+    int anti_alias) {
+  CFX_SizeGlyphCache* pSizeCache;
+  auto it = m_SizeMap.find(FaceGlyphsKey);
+  if (it == m_SizeMap.end()) {
+    auto pNewCache = pdfium::MakeUnique<CFX_SizeGlyphCache>();
+    pSizeCache = pNewCache.get();
+    m_SizeMap[FaceGlyphsKey] = std::move(pNewCache);
+  } else {
+    pSizeCache = it->second.get();
+  }
+  auto it2 = pSizeCache->m_GlyphMap.find(glyph_index);
+  if (it2 != pSizeCache->m_GlyphMap.end())
+    return it2->second.get();
+
+  std::unique_ptr<CFX_GlyphBitmap> pGlyphBitmap = RenderGlyph(
+      pFont, glyph_index, bFontStyle, pMatrix, dest_width, anti_alias);
+  CFX_GlyphBitmap* pResult = pGlyphBitmap.get();
+  pSizeCache->m_GlyphMap[glyph_index] = std::move(pGlyphBitmap);
+  return pResult;
+}