From 5110c4743751145c4ae1934cd1d83bc6c55bb43f Mon Sep 17 00:00:00 2001
From: John Abd-El-Malek <jabdelmalek@google.com>
Date: Sat, 17 May 2014 22:33:34 -0700
Subject: Initial commit.

---
 core/src/fxge/ge/fx_ge_font.cpp | 458 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 458 insertions(+)
 create mode 100644 core/src/fxge/ge/fx_ge_font.cpp

(limited to 'core/src/fxge/ge/fx_ge_font.cpp')

diff --git a/core/src/fxge/ge/fx_ge_font.cpp b/core/src/fxge/ge/fx_ge_font.cpp
new file mode 100644
index 0000000000..e047d2ecb0
--- /dev/null
+++ b/core/src/fxge/ge/fx_ge_font.cpp
@@ -0,0 +1,458 @@
+// 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 "../../../include/fxge/fx_ge.h"
+#include "../../../include/fxge/fx_freetype.h"
+#include "text_int.h"
+#define EM_ADJUST(em, a) (em == 0?(a): (a)*1000/em)
+extern void _FPDFAPI_GetInternalFontData(int id1, FX_LPCBYTE& data, FX_DWORD& size);
+CFX_Font::CFX_Font()
+{
+    m_pSubstFont = NULL;
+    m_Face = NULL;
+    m_bEmbedded = FALSE;
+    m_bVertical = FALSE;
+    m_pFontData = NULL;
+    m_pFontDataAllocation = NULL;
+    m_dwSize = 0;
+    m_pOwnedStream = NULL;
+    m_pGsubData = NULL;
+    m_pPlatformFont = NULL;
+    m_pPlatformFontCollection = NULL;
+    m_pDwFont = NULL;
+    m_hHandle = NULL;
+    m_bDwLoaded = FALSE;
+}
+CFX_Font::~CFX_Font()
+{
+    if (m_pSubstFont) {
+        delete m_pSubstFont;
+        m_pSubstFont = NULL;
+    }
+#ifdef FOXIT_CHROME_BUILD
+    if (m_pFontDataAllocation) {
+        FX_Free(m_pFontDataAllocation);
+        m_pFontDataAllocation = NULL;
+    }
+#endif
+    if (m_Face) {
+#ifdef FOXIT_CHROME_BUILD
+        FXFT_Library library = FXFT_Get_Face_FreeType(m_Face);
+        if (FXFT_Get_Face_External_Stream(m_Face)) {
+            FXFT_Clear_Face_External_Stream(m_Face);
+        }
+#endif
+        if(m_bEmbedded) {
+            DeleteFace();
+        } else {
+            CFX_GEModule::Get()->GetFontMgr()->ReleaseFace(m_Face);
+        }
+    }
+    if (m_pOwnedStream) {
+        FX_Free(m_pOwnedStream);
+        m_pOwnedStream = NULL;
+    }
+    if (m_pGsubData) {
+        FX_Free(m_pGsubData);
+        m_pGsubData = NULL;
+    }
+#if (_FXM_PLATFORM_  == _FXM_PLATFORM_APPLE_ && (!defined(_FPDFAPI_MINI_)))
+    ReleasePlatformResource();
+#endif
+}
+void CFX_Font::DeleteFace()
+{
+    FXFT_Done_Face(m_Face);
+    m_Face = NULL;
+}
+FX_BOOL CFX_Font::LoadSubst(const CFX_ByteString& face_name, FX_BOOL bTrueType, FX_DWORD flags,
+                            int weight, int italic_angle, int CharsetCP, FX_BOOL bVertical)
+{
+    m_bEmbedded = FALSE;
+    m_bVertical = bVertical;
+    m_pSubstFont = FX_NEW CFX_SubstFont;
+    if (!m_pSubstFont) {
+        return FALSE;
+    }
+    m_Face = CFX_GEModule::Get()->GetFontMgr()->FindSubstFont(face_name, bTrueType, flags, weight, italic_angle,
+             CharsetCP, m_pSubstFont);
+#if _FXM_PLATFORM_  == _FXM_PLATFORM_APPLE_
+    if(m_pSubstFont->m_ExtHandle) {
+        m_pPlatformFont = m_pSubstFont->m_ExtHandle;
+        m_pSubstFont->m_ExtHandle = NULL;
+    }
+#endif
+    if (m_Face) {
+        m_pFontData = FXFT_Get_Face_Stream_Base(m_Face);
+        m_dwSize = FXFT_Get_Face_Stream_Size(m_Face);
+    }
+    return TRUE;
+}
+extern "C" {
+    unsigned long _FTStreamRead(FXFT_Stream stream, unsigned long offset,
+                                unsigned char* buffer, unsigned long count)
+    {
+        if (count == 0) {
+            return 0;
+        }
+        IFX_FileRead* pFile = (IFX_FileRead*)stream->descriptor.pointer;
+        int res = pFile->ReadBlock(buffer, offset, count);
+        if (res) {
+            return count;
+        }
+        return 0;
+    }
+    void _FTStreamClose(FXFT_Stream stream)
+    {
+    }
+};
+FX_BOOL _LoadFile(FXFT_Library library, FXFT_Face* Face, IFX_FileRead* pFile, FXFT_Stream* stream)
+{
+    FXFT_Stream stream1 = (FXFT_Stream)FX_Alloc(FX_BYTE, sizeof (FXFT_StreamRec));
+    if (!stream1) {
+        return FALSE;
+    }
+    stream1->base = NULL;
+    stream1->size = (unsigned long)pFile->GetSize();
+    stream1->pos = 0;
+    stream1->descriptor.pointer = pFile;
+    stream1->close = _FTStreamClose;
+    stream1->read = _FTStreamRead;
+    FXFT_Open_Args args;
+    args.flags = FT_OPEN_STREAM;
+    args.stream = stream1;
+    if (FXFT_Open_Face(library, &args, 0, Face)) {
+        FX_Free(stream1);
+        return FALSE;
+    }
+    if (stream) {
+        *stream = stream1;
+    }
+    return TRUE;
+}
+FX_BOOL CFX_Font::LoadFile(IFX_FileRead* pFile)
+{
+    m_bEmbedded = FALSE;
+    FXFT_Library library;
+    if (CFX_GEModule::Get()->GetFontMgr()->m_FTLibrary == NULL) {
+        FXFT_Init_FreeType(&CFX_GEModule::Get()->GetFontMgr()->m_FTLibrary);
+    }
+    library = CFX_GEModule::Get()->GetFontMgr()->m_FTLibrary;
+    FXFT_Stream stream = NULL;
+    if (!_LoadFile(library, &m_Face, pFile, &stream)) {
+        return FALSE;
+    }
+    m_pOwnedStream = stream;
+    FXFT_Set_Pixel_Sizes(m_Face, 0, 64);
+    return TRUE;
+}
+int CFX_Font::GetGlyphWidth(FX_DWORD glyph_index)
+{
+    if (!m_Face) {
+        return 0;
+    }
+    if (m_pSubstFont && (m_pSubstFont->m_SubstFlags & FXFONT_SUBST_MM)) {
+        AdjustMMParams(glyph_index, 0, 0);
+    }
+    int err = FXFT_Load_Glyph(m_Face, glyph_index, FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);
+    if (err) {
+        return 0;
+    }
+    int width = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Glyph_HoriAdvance(m_Face));
+    return width;
+}
+static FXFT_Face FT_LoadFont(FX_LPBYTE pData, int size)
+{
+    FXFT_Library library;
+    if (CFX_GEModule::Get()->GetFontMgr()->m_FTLibrary == NULL) {
+        FXFT_Init_FreeType(&CFX_GEModule::Get()->GetFontMgr()->m_FTLibrary);
+    }
+    library = CFX_GEModule::Get()->GetFontMgr()->m_FTLibrary;
+    FXFT_Face face;
+    int error = FXFT_New_Memory_Face(library, pData, size, 0, &face);
+    if (error) {
+        return NULL;
+    }
+    error = FXFT_Set_Pixel_Sizes(face, 64, 64);
+    if (error) {
+        return NULL;
+    }
+    return face;
+}
+FX_BOOL CFX_Font::LoadEmbedded(FX_LPCBYTE data, FX_DWORD size)
+{
+#ifdef FOXIT_CHROME_BUILD
+    m_pFontDataAllocation = FX_Alloc(FX_BYTE, size);
+    if (!m_pFontDataAllocation) {
+        return FALSE;
+    }
+    FXSYS_memcpy32(m_pFontDataAllocation, data, size);
+    m_Face = FT_LoadFont((FX_LPBYTE)m_pFontDataAllocation, size);
+    m_pFontData = (FX_LPBYTE)m_pFontDataAllocation;
+#else
+    m_Face = FT_LoadFont((FX_LPBYTE)data, size);
+    m_pFontData = (FX_LPBYTE)data;
+#endif
+    m_bEmbedded = TRUE;
+    m_dwSize = size;
+    return m_Face != NULL;
+}
+FX_BOOL CFX_Font::IsTTFont()
+{
+    if (m_Face == NULL) {
+        return FALSE;
+    }
+    return FXFT_Is_Face_TT_OT(m_Face) == FXFT_FACE_FLAG_SFNT;
+}
+int CFX_Font::GetAscent() const
+{
+    if (m_Face == NULL) {
+        return 0;
+    }
+    int ascent = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_Ascender(m_Face));
+    return ascent;
+}
+int CFX_Font::GetDescent() const
+{
+    if (m_Face == NULL) {
+        return 0;
+    }
+    int descent = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_Descender(m_Face));
+    return descent;
+}
+FX_BOOL CFX_Font::GetGlyphBBox(FX_DWORD glyph_index, FX_RECT &bbox)
+{
+    if (m_Face == NULL) {
+        return FALSE;
+    }
+    if (FXFT_Is_Face_Tricky(m_Face)) {
+        int error = FXFT_Set_Char_Size(m_Face, 0, 1000 * 64, 72, 72);
+        if (error) {
+            return FALSE;
+        }
+        error = FXFT_Load_Glyph(m_Face, glyph_index, FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);
+        if (error) {
+            return FALSE;
+        }
+        FXFT_BBox cbox;
+        FT_Glyph glyph;
+        error = FXFT_Get_Glyph(((FXFT_Face)m_Face)->glyph, &glyph);
+        if (error) {
+            return FALSE;
+        }
+        FXFT_Glyph_Get_CBox(glyph, FXFT_GLYPH_BBOX_PIXELS, &cbox);
+        int pixel_size_x = ((FXFT_Face)m_Face)->size->metrics.x_ppem,
+            pixel_size_y = ((FXFT_Face)m_Face)->size->metrics.y_ppem;
+        if (pixel_size_x == 0 || pixel_size_y == 0) {
+            bbox.left = cbox.xMin;
+            bbox.right = cbox.xMax;
+            bbox.top = cbox.yMax;
+            bbox.bottom = cbox.yMin;
+        } else {
+            bbox.left = cbox.xMin * 1000 / pixel_size_x;
+            bbox.right = cbox.xMax * 1000 / pixel_size_x;
+            bbox.top = cbox.yMax * 1000 / pixel_size_y;
+            bbox.bottom = cbox.yMin * 1000 / pixel_size_y;
+        }
+        if (bbox.top > FXFT_Get_Face_Ascender(m_Face)) {
+            bbox.top = FXFT_Get_Face_Ascender(m_Face);
+        }
+        if (bbox.bottom < FXFT_Get_Face_Descender(m_Face)) {
+            bbox.bottom = FXFT_Get_Face_Descender(m_Face);
+        }
+        FT_Done_Glyph(glyph);
+        return FXFT_Set_Pixel_Sizes(m_Face, 0, 64) == 0;
+    }
+    if (FXFT_Load_Glyph(m_Face, glyph_index, FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) {
+        return FALSE;
+    }
+    int em = FXFT_Get_Face_UnitsPerEM(m_Face);
+    if (em == 0) {
+        bbox.left = FXFT_Get_Glyph_HoriBearingX(m_Face);
+        bbox.bottom = FXFT_Get_Glyph_HoriBearingY(m_Face);
+        bbox.top = bbox.bottom - FXFT_Get_Glyph_Height(m_Face);
+        bbox.right = bbox.left + FXFT_Get_Glyph_Width(m_Face);
+    } else {
+        bbox.left = FXFT_Get_Glyph_HoriBearingX(m_Face) * 1000 / em;
+        bbox.top = (FXFT_Get_Glyph_HoriBearingY(m_Face) - FXFT_Get_Glyph_Height(m_Face)) * 1000 / em;
+        bbox.right = (FXFT_Get_Glyph_HoriBearingX(m_Face) + FXFT_Get_Glyph_Width(m_Face)) * 1000 / em;
+        bbox.bottom = (FXFT_Get_Glyph_HoriBearingY(m_Face)) * 1000 / em;
+    }
+    return TRUE;
+}
+FX_BOOL CFX_Font::IsItalic()
+{
+    if (m_Face == NULL) {
+        return FALSE;
+    }
+    FX_BOOL ret = FXFT_Is_Face_Italic(m_Face) == FXFT_STYLE_FLAG_ITALIC;
+    if (!ret) {
+        CFX_ByteString str(FXFT_Get_Face_Style_Name(m_Face));
+        str.MakeLower();
+        if (str.Find("italic") != -1) {
+            ret = TRUE;
+        }
+    }
+    return ret;
+}
+FX_BOOL CFX_Font::IsBold()
+{
+    if (m_Face == NULL) {
+        return FALSE;
+    }
+    return FXFT_Is_Face_Bold(m_Face) == FXFT_STYLE_FLAG_BOLD;
+}
+FX_BOOL CFX_Font::IsFixedWidth()
+{
+    if (m_Face == NULL) {
+        return FALSE;
+    }
+    return FXFT_Is_Face_fixedwidth(m_Face);
+}
+CFX_WideString CFX_Font::GetPsName() const
+{
+    if (m_Face == NULL) {
+        return CFX_WideString();
+    }
+    CFX_WideString psName = CFX_WideString::FromLocal(FXFT_Get_Postscript_Name(m_Face));
+    if (psName.IsEmpty()) {
+        psName =  CFX_WideString::FromLocal("Untitled");
+    }
+    return psName;
+}
+CFX_ByteString CFX_Font::GetFamilyName() const
+{
+    if (m_Face == NULL && m_pSubstFont == NULL) {
+        return CFX_ByteString();
+    }
+    if (m_Face) {
+        return CFX_ByteString(FXFT_Get_Face_Family_Name(m_Face));
+    } else {
+        return m_pSubstFont->m_Family;
+    }
+}
+CFX_ByteString CFX_Font::GetFaceName() const
+{
+    if (m_Face == NULL && m_pSubstFont == NULL) {
+        return CFX_ByteString();
+    }
+    if (m_Face) {
+        CFX_ByteString facename;
+        CFX_ByteString style = CFX_ByteString(FXFT_Get_Face_Style_Name(m_Face));
+        facename = GetFamilyName();
+        if (facename.IsEmpty()) {
+            facename = "Untitled";
+        }
+        if (!style.IsEmpty() && style != "Regular") {
+            facename += " " + style;
+        }
+        return facename;
+    } else {
+        return m_pSubstFont->m_Family;
+    }
+}
+FX_BOOL CFX_Font::GetBBox(FX_RECT &bbox)
+{
+    if (m_Face == NULL) {
+        return FALSE;
+    }
+    int em = FXFT_Get_Face_UnitsPerEM(m_Face);
+    if (em == 0) {
+        bbox.left = FXFT_Get_Face_xMin(m_Face);
+        bbox.bottom = FXFT_Get_Face_yMax(m_Face);
+        bbox.top = FXFT_Get_Face_yMin(m_Face);
+        bbox.right = FXFT_Get_Face_xMax(m_Face);
+    } else {
+        bbox.left = FXFT_Get_Face_xMin(m_Face) * 1000 / em;
+        bbox.top = FXFT_Get_Face_yMin(m_Face) * 1000 / em;
+        bbox.right = FXFT_Get_Face_xMax(m_Face) * 1000 / em;
+        bbox.bottom = FXFT_Get_Face_yMax(m_Face) * 1000 / em;
+    }
+    return TRUE;
+}
+int CFX_Font::GetHeight()
+{
+    if (m_Face == NULL) {
+        return 0;
+    }
+    int height = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_Height(m_Face));
+    return height;
+}
+int CFX_Font::GetMaxAdvanceWidth()
+{
+    if (m_Face == NULL) {
+        return 0;
+    }
+    int width = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_MaxAdvanceWidth(m_Face));
+    return width;
+}
+int CFX_Font::GetULPos()
+{
+    if (m_Face == NULL) {
+        return 0;
+    }
+    int pos = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_UnderLinePosition(m_Face));
+    return pos;
+}
+int CFX_Font::GetULthickness()
+{
+    if (m_Face == NULL) {
+        return 0;
+    }
+    int thickness = EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face), FXFT_Get_Face_UnderLineThickness(m_Face));
+    return thickness;
+}
+CFX_UnicodeEncoding::CFX_UnicodeEncoding(CFX_Font* pFont)
+{
+    m_pFont = pFont;
+}
+FX_DWORD CFX_UnicodeEncoding::GlyphFromCharCode(FX_DWORD charcode)
+{
+    FXFT_Face face =  m_pFont->GetFace();
+    if (!face) {
+        return charcode;
+    }
+    if (FXFT_Select_Charmap(face, FXFT_ENCODING_UNICODE) == 0) {
+        return FXFT_Get_Char_Index(face, charcode);
+    }
+    if (m_pFont->m_pSubstFont && m_pFont->m_pSubstFont->m_Charset == 2) {
+        FX_DWORD index = 0;
+        if (FXFT_Select_Charmap(face, FXFT_ENCODING_MS_SYMBOL) == 0) {
+            index = FXFT_Get_Char_Index(face, charcode);
+        }
+        if (!index && !FXFT_Select_Charmap(face, FXFT_ENCODING_APPLE_ROMAN)) {
+            return FXFT_Get_Char_Index(face, charcode);
+        }
+    }
+    return charcode;
+}
+FX_DWORD CFX_UnicodeEncoding::GlyphFromCharCodeEx(FX_DWORD charcode, int encoding)
+{
+    FXFT_Face face =  m_pFont->GetFace();
+    if (!face) {
+        return charcode;
+    }
+    if (encoding == ENCODING_UNICODE) {
+        return	GlyphFromCharCode(charcode);
+    } else {
+        int nmaps = FXFT_Get_Face_CharmapCount(m_pFont->m_Face);
+        int i = 0;
+        while (i < nmaps) {
+            int encoding = FXFT_Get_Charmap_Encoding(FXFT_Get_Face_Charmaps(face)[i++]);
+            if (encoding != FXFT_ENCODING_UNICODE) {
+                FXFT_Select_Charmap(face, encoding);
+                break;
+            }
+        }
+    }
+    return FXFT_Get_Char_Index(face, charcode);
+}
+IFX_FontEncoding* FXGE_CreateUnicodeEncoding(CFX_Font* pFont)
+{
+    CFX_UnicodeEncoding* pEncoding = NULL;
+    pEncoding = FX_NEW CFX_UnicodeEncoding(pFont);
+    return pEncoding;
+}
-- 
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