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_INT32 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));
}
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;
}
void CPDF_Font::CheckFontMetrics() {
if (m_FontBBox.top == 0 && m_FontBBox.bottom == 0 && m_FontBBox.left == 0 &&
m_FontBBox.right == 0) {
FXFT_Face face = m_Font.GetFace();
if (face) {
m_FontBBox.left = TT2PDF(FXFT_Get_Face_xMin(face), face);
m_FontBBox.bottom = TT2PDF(FXFT_Get_Face_yMin(face), face);
m_FontBBox.right = TT2PDF(FXFT_Get_Face_xMax(face), face);
m_FontBBox.top = TT2PDF(FXFT_Get_Face_yMax(face), face);
m_Ascent = TT2PDF(FXFT_Get_Face_Ascender(face), face);
m_Descent = TT2PDF(FXFT_Get_Face_Descender(face), face);
} else {
bool bFirst = true;
for (int i = 0; i < 256; i++) {
FX_RECT rect = GetCharBBox(i);
if (rect.left == rect.right) {
continue;
}
if (bFirst) {
m_FontBBox = rect;
bFirst = false;
} else {
if (m_FontBBox.top < rect.top) {
m_FontBBox.top = rect.top;
}
if (m_FontBBox.right < rect.right) {
m_FontBBox.right = rect.right;
}
if (m_FontBBox.left > rect.left) {
m_FontBBox.left = rect.left;
}
if (m_FontBBox.bottom > rect.bottom) {
m_FontBBox.bottom = rect.bottom;
}
}
}
}
}
if (m_Ascent == 0 && m_Descent == 0) {
FX_RECT rect = GetCharBBox('A');
m_Ascent = rect.bottom == rect.top ? m_FontBBox.top : rect.top;
rect = GetCharBBox('g');
m_Descent = rect.bottom == rect.top ? m_FontBBox.bottom : rect.bottom;
}
}
FX_RECT CPDF_CIDFont::GetCharBBox(uint32_t charcode) {
if (charcode < 256 && m_CharBBox[charcode].right != -1)
return m_CharBBox[charcode];
FX_RECT rect;
bool bVert = false;
int glyph_index = GlyphFromCharCode(charcode, &bVert);
FXFT_Face face = m_Font.GetFace();
if (face) {
if (FXFT_Is_Face_Tricky(face)) {
int err = FXFT_Load_Glyph(face, glyph_index,
FXFT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH);
if (!err) {
FXFT_BBox cbox;
FXFT_Glyph glyph;
err = FXFT_Get_Glyph(((FXFT_Face)face)->glyph, &glyph);
if (!err) {
FXFT_Glyph_Get_CBox(glyph, FXFT_GLYPH_BBOX_PIXELS, &cbox);
int pixel_size_x = ((FXFT_Face)face)->size->metrics.x_ppem;
int pixel_size_y = ((FXFT_Face)face)->size->metrics.y_ppem;
if (pixel_size_x == 0 || pixel_size_y == 0) {
rect = FX_RECT(cbox.xMin, cbox.yMax, cbox.xMax, cbox.yMin);
} else {
rect = FX_RECT(cbox.xMin * 1000 / pixel_size_x,
cbox.yMax * 1000 / pixel_size_y,
cbox.xMax * 1000 / pixel_size_x,
cbox.yMin * 1000 / pixel_size_y);
}
rect.top = std::min(rect.top,
static_cast<int>(FXFT_Get_Face_Ascender(face)));
rect.bottom = std::max(
rect.bottom, static_cast<int>(FXFT_Get_Face_Descender(face)));
FXFT_Done_Glyph(glyph);
}
}
} else {
int err = FXFT_Load_Glyph(face, glyph_index, FXFT_LOAD_NO_SCALE);
if (err == 0) {
rect = FX_RECT(TT2PDF(FXFT_Get_Glyph_HoriBearingX(face), face),
TT2PDF(FXFT_Get_Glyph_HoriBearingY(face), face),
TT2PDF(FXFT_Get_Glyph_HoriBearingX(face) +
FXFT_Get_Glyph_Width(face),
face),
TT2PDF(FXFT_Get_Glyph_HoriBearingY(face) -
FXFT_Get_Glyph_Height(face),
face));
rect.top += rect.top / 64;
}
}
}
if (!m_pFontFile && m_Charset == CIDSET_JAPAN1) {
uint16_t CID = CIDFromCharCode(charcode);
const uint8_t* pTransform = GetCIDTransform(CID);
if (pTransform && !bVert) {
CFX_Matrix matrix(CIDTransformToFloat(pTransform[0]),
CIDTransformToFloat(pTransform[1]),
CIDTransformToFloat(pTransform[2]),
CIDTransformToFloat(pTransform[3]),
CIDTransformToFloat(pTransform[4]) * 1000,
CIDTransformToFloat(pTransform[5]) * 1000);
CFX_FloatRect rect_f(rect);
matrix.TransformRect(rect_f);
rect = rect_f.GetOuterRect();
}
}
if (charcode < 256)
m_CharBBox[charcode] = rect;
return rect;
}
int CFX_Font::GetDescent() const {
if (!m_Face)
return 0;
return EM_ADJUST(FXFT_Get_Face_UnitsPerEM(m_Face),
FXFT_Get_Face_Descender(m_Face));
}