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// 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 "fx_fpf.h"
#if _FX_OS_ == _FX_ANDROID_
#include "fpf_skiafont.h"
#include "fpf_skiafontmgr.h"
#define FPF_EM_ADJUST(em, a) (em == 0 ? (a) : (a) * 1000 / em)
CFPF_SkiaFont::CFPF_SkiaFont()
: m_pFontMgr(NULL)
, m_pFontDes(NULL)
, m_Face(NULL)
, 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;
}
}
IFPF_Font* CFPF_SkiaFont::Retain()
{
m_dwRefCount++;
return (IFPF_Font*)this;
}
FPF_HFONT CFPF_SkiaFont::GetHandle()
{
return NULL;
}
CFX_ByteString CFPF_SkiaFont::GetFamilyName()
{
if (!m_Face) {
return CFX_ByteString();
}
return CFX_ByteString(FXFT_Get_Face_Family_Name(m_Face));
}
CFX_WideString CFPF_SkiaFont::GetPsName()
{
if (!m_Face) {
return CFX_WideString();
}
return CFX_WideString::FromLocal(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 = FX_MIN(rtBBox.top, GetAscent());
rtBBox.bottom = FX_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;
}
FX_DWORD CFPF_SkiaFont::GetFontData(FX_DWORD dwTable, uint8_t* pBuffer, FX_DWORD 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<FX_DWORD>(ulSize);
}
FX_BOOL CFPF_SkiaFont::InitFont(CFPF_SkiaFontMgr *pFontMgr, CFPF_SkiaFontDescriptor *pFontDes, const CFX_ByteStringC& bsFamily, FX_DWORD 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;
}
#endif
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