// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fxcrt/include/fx_system.h"
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#if _FX_OS_ == _FX_ANDROID_
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#include <algorithm>
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#include "core/fxge/android/fpf_skiafont.h"
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#include "core/fxge/android/fpf_skiafontmgr.h"
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#include "core/fxge/include/fx_freetype.h"
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#define FPF_EM_ADJUST(em, a) (em == 0 ? (a) : (a)*1000 / em)
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CFPF_SkiaFont::CFPF_SkiaFont()
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: m_pFontMgr(nullptr),
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m_pFontDes(nullptr),
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m_Face(nullptr),
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m_dwStyle(0),
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m_uCharset(0),
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m_dwRefCount(0) {}
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CFPF_SkiaFont::~CFPF_SkiaFont() {
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if (m_Face)
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FXFT_Done_Face(m_Face);
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}
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void CFPF_SkiaFont::Release() {
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if (--m_dwRefCount == 0)
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delete this;
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}
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CFPF_SkiaFont* CFPF_SkiaFont::Retain() {
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m_dwRefCount++;
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return this;
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}
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CFX_ByteString CFPF_SkiaFont::GetFamilyName() {
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if (!m_Face)
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return CFX_ByteString();
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return CFX_ByteString(FXFT_Get_Face_Family_Name(m_Face));
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}
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CFX_ByteString CFPF_SkiaFont::GetPsName() {
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if (!m_Face)
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return CFX_ByteString();
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return FXFT_Get_Postscript_Name(m_Face);
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}
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int32_t CFPF_SkiaFont::GetGlyphIndex(FX_WCHAR wUnicode) {
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if (!m_Face)
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return wUnicode;
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if (FXFT_Select_Charmap(m_Face, FXFT_ENCODING_UNICODE))
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return 0;
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return FXFT_Get_Char_Index(m_Face, wUnicode);
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}
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int32_t CFPF_SkiaFont::GetGlyphWidth(int32_t iGlyphIndex) {
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if (!m_Face)
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return 0;
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if (FXFT_Load_Glyph(
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m_Face, iGlyphIndex,
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FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) {
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return 0;
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}
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return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
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FXFT_Get_Glyph_HoriAdvance(m_Face));
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}
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int32_t CFPF_SkiaFont::GetAscent() const {
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if (!m_Face)
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return 0;
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return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
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FXFT_Get_Face_Ascender(m_Face));
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}
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int32_t CFPF_SkiaFont::GetDescent() const {
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if (!m_Face)
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return 0;
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return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
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FXFT_Get_Face_Descender(m_Face));
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}
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FX_BOOL CFPF_SkiaFont::GetGlyphBBox(int32_t iGlyphIndex, FX_RECT& rtBBox) {
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if (!m_Face)
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return FALSE;
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if (FXFT_Is_Face_Tricky(m_Face)) {
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if (FXFT_Set_Char_Size(m_Face, 0, 1000 * 64, 72, 72))
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return FALSE;
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if (FXFT_Load_Glyph(m_Face, iGlyphIndex,
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FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) {
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FXFT_Set_Pixel_Sizes(m_Face, 0, 64);
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return FALSE;
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}
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FXFT_Glyph glyph;
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if (FXFT_Get_Glyph(m_Face->glyph, &glyph)) {
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FXFT_Set_Pixel_Sizes(m_Face, 0, 64);
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return FALSE;
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}
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FXFT_BBox cbox;
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FXFT_Glyph_Get_CBox(glyph, FXFT_GLYPH_BBOX_PIXELS, &cbox);
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int32_t x_ppem = m_Face->size->metrics.x_ppem;
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int32_t y_ppem = m_Face->size->metrics.y_ppem;
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rtBBox.left = FPF_EM_ADJUST(x_ppem, cbox.xMin);
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rtBBox.right = FPF_EM_ADJUST(x_ppem, cbox.xMax);
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rtBBox.top = FPF_EM_ADJUST(y_ppem, cbox.yMax);
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rtBBox.bottom = FPF_EM_ADJUST(y_ppem, cbox.yMin);
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rtBBox.top = std::min(rtBBox.top, GetAscent());
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rtBBox.bottom = std::max(rtBBox.bottom, GetDescent());
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FXFT_Done_Glyph(glyph);
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return FXFT_Set_Pixel_Sizes(m_Face, 0, 64) == 0;
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}
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if (FXFT_Load_Glyph(
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m_Face, iGlyphIndex,
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FXFT_LOAD_NO_SCALE | FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH)) {
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return FALSE;
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}
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rtBBox.left = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
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FXFT_Get_Glyph_HoriBearingX(m_Face));
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rtBBox.bottom = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
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FXFT_Get_Glyph_HoriBearingY(m_Face));
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rtBBox.right = FPF_EM_ADJUST(
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FXFT_Get_Face_UnitsPerEM(m_Face),
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FXFT_Get_Glyph_HoriBearingX(m_Face) + FXFT_Get_Glyph_Width(m_Face));
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rtBBox.top = FPF_EM_ADJUST(
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FXFT_Get_Face_UnitsPerEM(m_Face),
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FXFT_Get_Glyph_HoriBearingY(m_Face) - FXFT_Get_Glyph_Height(m_Face));
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return TRUE;
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}
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FX_BOOL CFPF_SkiaFont::GetBBox(FX_RECT& rtBBox) {
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if (!m_Face) {
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return FALSE;
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}
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rtBBox.left = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
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FXFT_Get_Face_xMin(m_Face));
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rtBBox.top = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
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FXFT_Get_Face_yMin(m_Face));
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rtBBox.right = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
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FXFT_Get_Face_xMax(m_Face));
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rtBBox.bottom = FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
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FXFT_Get_Face_yMax(m_Face));
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return TRUE;
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}
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int32_t CFPF_SkiaFont::GetHeight() const {
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if (!m_Face)
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return 0;
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return FPF_EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
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FXFT_Get_Face_Height(m_Face));
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}
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int32_t CFPF_SkiaFont::GetItalicAngle() const {
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if (!m_Face)
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return 0;
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TT_Postscript* ttInfo =
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(TT_Postscript*)FT_Get_Sfnt_Table(m_Face, ft_sfnt_post);
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if (ttInfo)
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return ttInfo->italicAngle;
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return 0;
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}
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uint32_t CFPF_SkiaFont::GetFontData(uint32_t dwTable,
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uint8_t* pBuffer,
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uint32_t dwSize) {
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if (!m_Face)
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return 0;
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FT_ULong ulSize = pdfium::base::checked_cast<FT_ULong>(dwSize);
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if (FXFT_Load_Sfnt_Table(m_Face, dwTable, 0, pBuffer, &ulSize))
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return 0;
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return pdfium::base::checked_cast<uint32_t>(ulSize);
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}
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FX_BOOL CFPF_SkiaFont::InitFont(CFPF_SkiaFontMgr* pFontMgr,
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CFPF_SkiaFontDescriptor* pFontDes,
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const CFX_ByteStringC& bsFamily,
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uint32_t dwStyle,
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uint8_t uCharset) {
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if (!pFontMgr || !pFontDes)
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return FALSE;
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switch (pFontDes->GetType()) {
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case FPF_SKIAFONTTYPE_Path: {
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CFPF_SkiaPathFont* pFont = (CFPF_SkiaPathFont*)pFontDes;
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m_Face = pFontMgr->GetFontFace(pFont->m_pPath, pFont->m_iFaceIndex);
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break;
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}
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case FPF_SKIAFONTTYPE_File: {
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CFPF_SkiaFileFont* pFont = (CFPF_SkiaFileFont*)pFontDes;
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m_Face = pFontMgr->GetFontFace(pFont->m_pFile, pFont->m_iFaceIndex);
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break;
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}
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case FPF_SKIAFONTTYPE_Buffer: {
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CFPF_SkiaBufferFont* pFont = (CFPF_SkiaBufferFont*)pFontDes;
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m_Face = pFontMgr->GetFontFace((const uint8_t*)pFont->m_pBuffer,
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pFont->m_szBuffer, pFont->m_iFaceIndex);
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break;
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}
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default:
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return FALSE;
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}
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if (!m_Face)
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return FALSE;
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m_dwStyle = dwStyle;
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m_uCharset = uCharset;
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m_pFontMgr = pFontMgr;
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m_pFontDes = pFontDes;
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m_dwRefCount = 1;
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return TRUE;
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}
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#endif // _FX_OS_ == _FX_ANDROID_
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