#?-*-?coding:?utf-8?-*-
#?http://blog.csdn.net/zizi7/article/details/70145150

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##################################################
#?tools??????????????????????????????????????????#
#------------------------------------------------#
#?draw?chinese?text?using?freetype?on?python2.x??#??????????????????#
#?2017.4.12??????????????????????????????????????#
##################################################
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??????????????????????????????????????????????????????????????
import?numpy?as?np
import?freetype
import?copy
import?pdb

class?put_chinese_text（object）:
????def?__init__（self?ttf）:
????????self._face?=?freetype.Face（ttf）

????def?draw_text（self?image?pos?text?text_size?text_color）:
????????‘‘‘
????????draw?chinese（or?not）?text?with?ttf
????????:param?image:?????image（numpy.ndarray）?to?draw?text
????????:param?pos:???????where?to?draw?text
????????:param?text:??????the?context?for?chinese?should?be?unicode?type
????????:param?text_size:?text?size
????????:param?text_color:text?color
????????:return:??????????image
????????‘‘‘
????????self._face.set_char_size（text_size?*?64）
????????metrics?=?self._face.size
????????ascender?=?metrics.ascender/64.0

????????#descender?=?metrics.descender/64.0
????????#height?=?metrics.height/64.0
????????#linegap?=?height?-?ascender?+?descender
????????ypos?=?int（ascender）

????????if?not?isinstance（text?unicode）:
????????????text?=?text.decode（‘utf-8‘）
????????img?=?self.draw_string（image?pos[0]?pos[1]+ypos?text?text_color）
????????return?img

????def?draw_string（self?img?x_pos?y_pos?text?color）:
????????‘‘‘
????????draw?string
????????:param?x_pos:?text?x-postion?on?img
????????:param?y_pos:?text?y-postion?on?img
????????:param?text:??text?（unicode）
????????:param?color:?text?color
????????:return:??????image
????????‘‘‘
????????prev_char?=?0
????????pen?=?freetype.Vector（）
????????pen.x?=?x_pos?<????????pen.y?=?y_pos?<
????????hscale?=?1.0
????????matrix?=?freetype.Matrix（int（hscale）*0x10000L?int（0.2*0x10000L）\
?????????????????????????????????int（0.0*0x10000L）?int（1.1*0x10000L））
????????cur_pen?=?freetype.Vector（）
????????pen_translate?=?freetype.Vector（）

????????image?=?copy.deepcopy（img）
????????for?cur_char?in?text:
????????????self._face.set_transform（matrix?pen_translate）

????????????self._face.load_char（cur_char）
????????????kerning?=?self._face.get_kerning（prev_char?cur_char）
????????????pen.x?+=?kerning.x
????????????slot?=?self._face.glyph
????????????bitmap?=?slot.bitmap

????????????cur_pen.x?=?pen.x
????????????cur_pen.y?=?pen.y?-?slot.bitmap_top?*?64
????????????self.draw_ft_bitmap（image?bitmap?cur_pen?color）

????????????pen.x?+=?slot.advance.x
????????????prev_char?=?cur_char

????????return?image

????def?draw_ft_bitmap（self?img?bitmap?pen?color）:
????????‘‘‘
????????draw?each?char
????????:param?bitmap:?bitmap
????????:param?pen:????pen
????????:param?c

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-07-21?00:35??hzTest\
?????目錄???????????0??2017-07-21?00:35??hzTest\.idea\
?????文件?????????459??2017-07-21?00:34??hzTest\.idea\hzTest.iml
?????目錄???????????0??2017-07-21?00:33??hzTest\.idea\inspectionProfiles\
?????文件?????????228??2017-07-21?00:33??hzTest\.idea\inspectionProfiles\profiles_settings.xml
?????文件?????????226??2017-07-21?00:33??hzTest\.idea\misc.xml
?????文件?????????264??2017-07-21?00:33??hzTest\.idea\modules.xml
?????文件???????22301??2017-07-21?00:35??hzTest\.idea\workspace.xml
?????文件????????3954??2017-07-21?00:34??hzTest\ft2.py
?????文件????????4137??2017-07-21?00:35??hzTest\ft2.pyc
?????文件?????????384??2017-07-21?00:35??hzTest\hzTest.py
?????文件????21767952??2009-06-11?05:25??hzTest\msyh.ttf
?????目錄???????????0??2017-07-21?00:35??hzTest\pic\
?????文件????????9886??2017-07-12?12:58??hzTest\pic\lena.jpg