Name core/fxge/android files appropriately and use one file per class

- Rename files so that they correspond to class names.
- Remove OS_Android ifs, since they are unneeded.
- Split fpf_skiafontmgr.h into classes, one per file.

Review-Url: https://codereview.chromium.org/2448293002

1 files changed, 219 insertions, 0 deletions

diff --git a/core/fxge/android/cfpf_skiafont.cpp b/core/fxge/android/cfpf_skiafont.cpp
new file mode 100644
index 0000000000..c7cfd4d324
--- /dev/null
+++ b/core/fxge/android/cfpf_skiafont.cpp
@@ -0,0 +1,219 @@
+// 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/android/cfpf_skiafont.h"
+
+#include <algorithm>
+
+#include "core/fxcrt/fx_system.h"
+#include "core/fxge/android/cfpf_skiabufferfont.h"
+#include "core/fxge/android/cfpf_skiafilefont.h"
+#include "core/fxge/android/cfpf_skiafontdescriptor.h"
+#include "core/fxge/android/cfpf_skiafontmgr.h"
+#include "core/fxge/android/cfpf_skiapathfont.h"
+#include "core/fxge/fx_freetype.h"
+
+#define FPF_EM_ADJUST(em, a) (em == 0 ? (a) : (a)*1000 / em)
+
+CFPF_SkiaFont::CFPF_SkiaFont()
+    : m_pFontMgr(nullptr),
+      m_pFontDes(nullptr),
+      m_Face(nullptr),
+      m_dwStyle(0),
+      m_uCharset(0),
+      m_dwRefCount(0) {}
+
+CFPF_SkiaFont::~CFPF_SkiaFont() {
+  if (m_Face)
+    FXFT_Done_Face(m_Face);
+}
+
+void CFPF_SkiaFont::Release() {
+  if (--m_dwRefCount == 0)
+    delete this;
+}
+
+CFPF_SkiaFont* CFPF_SkiaFont::Retain() {
+  m_dwRefCount++;
+  return this;
+}
+
+CFX_ByteString CFPF_SkiaFont::GetFamilyName() {
+  if (!m_Face)
+    return CFX_ByteString();
+  return CFX_ByteString(FXFT_Get_Face_Family_Name(m_Face));
+}
+
+CFX_ByteString CFPF_SkiaFont::GetPsName() {
+  if (!m_Face)
+    return CFX_ByteString();
+  return FXFT_Get_Postscript_Name(m_Face);
+}
+
+int32_t CFPF_SkiaFont::GetGlyphIndex(FX_WCHAR wUnicode) {
+  if (!m_Face)
+    return wUnicode;
+  if (FXFT_Select_Charmap(m_Face, FXFT_ENCODING_UNICODE))
+    return 0;
+  return FXFT_Get_Char_Index(m_Face, wUnicode);
+}
+
+int32_t CFPF_SkiaFont::GetGlyphWidth(int32_t iGlyphIndex) {
+  if (!m_Face)
+    return 0;
+  if (FXFT_Load_Glyph(
+          m_Face, iGlyphIndex,
+          FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) {
+    return 0;
+  }
+  return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
+                       FXFT_Get_Glyph_HoriAdvance(m_Face));
+}
+
+int32_t CFPF_SkiaFont::GetAscent() const {
+  if (!m_Face)
+    return 0;
+  return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
+                       FXFT_Get_Face_Ascender(m_Face));
+}
+
+int32_t CFPF_SkiaFont::GetDescent() const {
+  if (!m_Face)
+    return 0;
+  return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
+                       FXFT_Get_Face_Descender(m_Face));
+}
+
+FX_BOOL CFPF_SkiaFont::GetGlyphBBox(int32_t iGlyphIndex, FX_RECT& rtBBox) {
+  if (!m_Face)
+    return FALSE;
+  if (FXFT_Is_Face_Tricky(m_Face)) {
+    if (FXFT_Set_Char_Size(m_Face, 0, 1000 * 64, 72, 72))
+      return FALSE;
+    if (FXFT_Load_Glyph(m_Face, iGlyphIndex,
+                        FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) {
+      FXFT_Set_Pixel_Sizes(m_Face, 0, 64);
+      return FALSE;
+    }
+    FXFT_Glyph glyph;
+    if (FXFT_Get_Glyph(m_Face->glyph, &glyph)) {
+      FXFT_Set_Pixel_Sizes(m_Face, 0, 64);
+      return FALSE;
+    }
+    FXFT_BBox cbox;
+    FXFT_Glyph_Get_CBox(glyph, FXFT_GLYPH_BBOX_PIXELS, &cbox);
+    int32_t x_ppem = m_Face->size->metrics.x_ppem;
+    int32_t y_ppem = m_Face->size->metrics.y_ppem;
+    rtBBox.left = FPF_EM_ADJUST(x_ppem, cbox.xMin);
+    rtBBox.right = FPF_EM_ADJUST(x_ppem, cbox.xMax);
+    rtBBox.top = FPF_EM_ADJUST(y_ppem, cbox.yMax);
+    rtBBox.bottom = FPF_EM_ADJUST(y_ppem, cbox.yMin);
+    rtBBox.top = std::min(rtBBox.top, GetAscent());
+    rtBBox.bottom = std::max(rtBBox.bottom, GetDescent());
+    FXFT_Done_Glyph(glyph);
+    return FXFT_Set_Pixel_Sizes(m_Face, 0, 64) == 0;
+  }
+  if (FXFT_Load_Glyph(
+          m_Face, iGlyphIndex,
+          FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) {
+    return FALSE;
+  }
+  rtBBox.left = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
+                              FXFT_Get_Glyph_HoriBearingX(m_Face));
+  rtBBox.bottom = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
+                                FXFT_Get_Glyph_HoriBearingY(m_Face));
+  rtBBox.right = FPF_EM_ADJUST(
+      FXFT_Get_Face_UnitsPerEM(m_Face),
+      FXFT_Get_Glyph_HoriBearingX(m_Face) + FXFT_Get_Glyph_Width(m_Face));
+  rtBBox.top = FPF_EM_ADJUST(
+      FXFT_Get_Face_UnitsPerEM(m_Face),
+      FXFT_Get_Glyph_HoriBearingY(m_Face) - FXFT_Get_Glyph_Height(m_Face));
+  return TRUE;
+}
+
+FX_BOOL CFPF_SkiaFont::GetBBox(FX_RECT& rtBBox) {
+  if (!m_Face) {
+    return FALSE;
+  }
+  rtBBox.left = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
+                              FXFT_Get_Face_xMin(m_Face));
+  rtBBox.top = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
+                             FXFT_Get_Face_yMin(m_Face));
+  rtBBox.right = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
+                               FXFT_Get_Face_xMax(m_Face));
+  rtBBox.bottom = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
+                                FXFT_Get_Face_yMax(m_Face));
+  return TRUE;
+}
+
+int32_t CFPF_SkiaFont::GetHeight() const {
+  if (!m_Face)
+    return 0;
+  return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
+                       FXFT_Get_Face_Height(m_Face));
+}
+
+int32_t CFPF_SkiaFont::GetItalicAngle() const {
+  if (!m_Face)
+    return 0;
+
+  TT_Postscript* ttInfo =
+      (TT_Postscript*)FT_Get_Sfnt_Table(m_Face, ft_sfnt_post);
+  if (ttInfo)
+    return ttInfo->italicAngle;
+  return 0;
+}
+
+uint32_t CFPF_SkiaFont::GetFontData(uint32_t dwTable,
+                                    uint8_t* pBuffer,
+                                    uint32_t dwSize) {
+  if (!m_Face)
+    return 0;
+
+  FT_ULong ulSize = pdfium::base::checked_cast<FT_ULong>(dwSize);
+  if (FXFT_Load_Sfnt_Table(m_Face, dwTable, 0, pBuffer, &ulSize))
+    return 0;
+  return pdfium::base::checked_cast<uint32_t>(ulSize);
+}
+
+FX_BOOL CFPF_SkiaFont::InitFont(CFPF_SkiaFontMgr* pFontMgr,
+                                CFPF_SkiaFontDescriptor* pFontDes,
+                                const CFX_ByteStringC& bsFamily,
+                                uint32_t dwStyle,
+                                uint8_t uCharset) {
+  if (!pFontMgr || !pFontDes)
+    return FALSE;
+
+  switch (pFontDes->GetType()) {
+    case FPF_SKIAFONTTYPE_Path: {
+      CFPF_SkiaPathFont* pFont = (CFPF_SkiaPathFont*)pFontDes;
+      m_Face = pFontMgr->GetFontFace(pFont->m_pPath, pFont->m_iFaceIndex);
+      break;
+    }
+    case FPF_SKIAFONTTYPE_File: {
+      CFPF_SkiaFileFont* pFont = (CFPF_SkiaFileFont*)pFontDes;
+      m_Face = pFontMgr->GetFontFace(pFont->m_pFile, pFont->m_iFaceIndex);
+      break;
+    }
+    case FPF_SKIAFONTTYPE_Buffer: {
+      CFPF_SkiaBufferFont* pFont = (CFPF_SkiaBufferFont*)pFontDes;
+      m_Face = pFontMgr->GetFontFace((const uint8_t*)pFont->m_pBuffer,
+                                     pFont->m_szBuffer, pFont->m_iFaceIndex);
+      break;
+    }
+    default:
+      return FALSE;
+  }
+  if (!m_Face)
+    return FALSE;
+
+  m_dwStyle = dwStyle;
+  m_uCharset = uCharset;
+  m_pFontMgr = pFontMgr;
+  m_pFontDes = pFontDes;
+  m_dwRefCount = 1;
+  return TRUE;
+}