class MonospaceFontAtlas(object):
def __init__(self,font_info,size,dpi):
self.font_info=font_info
self.size=size
self.dpi=dpi
self.id=self.getIdFromArgs(font_info,size,dpi)
self._face=Face(font_info.path)
self._face.set_char_size(height=self.size*64,vres=self.dpi)
self.charcode2glyph=None
self.charcode2unichr=None
self.charcode2displaylist=None
self.max_ascender = None
self.max_descender = None
self.max_tile_width = None
self.max_tile_height = None
self.max_bitmap_size = None
self.total_bitmap_area=0
self.atlas=None
def getID(self):
return self.id
@staticmethod
def getIdFromArgs(font_info,size,dpi):
return "%s_%d_%d"%(font_info.getID(),size,dpi)
def createFontAtlas(self):
if self.atlas:
self.atlas.free()
self.atlas=None
self.charcode2glyph={}
self.charcode2unichr={}
self.max_ascender = None
self.max_descender = None
self.max_tile_width = None
self.max_tile_height = None
self.max_bitmap_size = None
self.total_bitmap_area=0
# load font glyphs and calculate max. char size.
# This is used when the altas is created to properly size the tex.
# i.e. max glyph size * num glyphs
#
max_w,max_h=0,0
max_ascender, max_descender, max_tile_width = 0, 0, 0
face=self._face
face.set_char_size(height=self.size*64,vres=self.dpi)
# Create texAtlas for glyph set.
x_ppem=face.size.x_ppem
y_ppem=face.size.x_ppem
units_ppem=self.font_info.units_per_em
est_max_width=(face.bbox.xMax-face.bbox.xMin)/float(units_ppem)*x_ppem
est_max_height=face.size.ascender/float(units_ppem)*y_ppem
target_atlas_area=int(est_max_width*est_max_height)*face.num_glyphs
# make sure it is big enough. ;)
# height is trimmed before sending to video ram anyhow.
target_atlas_area=target_atlas_area*3.0
pow2_area=nextPow2(target_atlas_area)
atlas_width=2048
atlas_height=pow2_area/atlas_width
self.atlas=TextureAtlas(atlas_width,atlas_height)
charcode, gindex=face.get_first_char()
while gindex:
uchar = unichr(charcode)
if ud.category(uchar) not in (u'Zl',u'Zp',u'Cc',u'Cf',u'Cs',u'Co',u'Cn'):
self.charcode2unichr[charcode]=uchar
face.load_char(uchar, FT_LOAD_RENDER | FT_LOAD_FORCE_AUTOHINT )
bitmap = face.glyph.bitmap
self.total_bitmap_area+=bitmap.width*bitmap.rows
max_ascender = max( max_ascender, face.glyph.bitmap_top)
max_descender = max( max_descender, bitmap.rows - face.glyph.bitmap_top )
max_tile_width = max( max_tile_width,bitmap.width)
max_w=max(bitmap.width,max_w)
max_h=max(bitmap.rows,max_h)
x,y,w,h = self.atlas.get_region(bitmap.width+2, bitmap.rows+2)
if x < 0:
raise Exception("MonospaceFontAtlas.get_region failed for: {0}, requested area: {1}. Atlas Full!".format(charcode,(bitmap.width+2, bitmap.rows+2)))
x,y = x+1, y+1
w,h = w-2, h-2
data = np.array(bitmap._FT_Bitmap.buffer[:(bitmap.rows*bitmap.width)],dtype=np.ubyte).reshape(h,w,1)
self.atlas.set_region((x,y,w,h), data)
self.charcode2glyph[charcode]=dict(
offset=(face.glyph.bitmap_left, face.glyph.bitmap_top),
size=(w,h),
atlas_coords=(x,y,w,h),
texcoords = [x, y, x + w, y + h],
index=gindex,
unichar=uchar
)
charcode, gindex = face.get_next_char(charcode, gindex)
self.max_ascender = max_ascender
self.max_descender = max_descender
self.max_tile_width = max_tile_width
self.max_tile_height = max_ascender+max_descender
self.max_bitmap_size=max_w,max_h
# resize atlas
height=nextPow2(self.atlas.max_y+1)
self.atlas.resize(height)
self.atlas.upload()
self.createDisplayLists()
self._face=None
#print 'w_max_glyth info:',w_max_glyph
#print 'h_max_glyth info:',h_max_glyph
def createDisplayLists(self):
glyph_count=len(self.charcode2unichr)
max_tile_width,max_tile_height=self.max_tile_width,self.max_tile_height
display_lists_for_chars={}
base = glGenLists(glyph_count)
for i,(charcode,glyph) in enumerate( self.charcode2glyph.iteritems()):
dl_index=base+i
uchar=self.charcode2unichr[charcode]
# update tex coords to reflect earlier resize of atlas height.
gx1,gy1,gx2,gy2=glyph['texcoords']
gx1=gx1/float(self.atlas.width)
gy1=gy1/float(self.atlas.height)
gx2=gx2/float(self.atlas.width)
gy2=gy2/float(self.atlas.height)
glyph['texcoords'] =[gx1,gy1,gx2,gy2]
glNewList(dl_index, GL_COMPILE)
if uchar not in [u'\t',u'\n']:
glBegin( GL_QUADS )
x1 = glyph['offset'][0]
x2 = x1+glyph['size'][0]
y1=(self.max_ascender-glyph['offset'][1])
y2=y1+glyph['size'][1]
glTexCoord2f( gx1, gy2 ), glVertex2f( x1,-y2 )
glTexCoord2f( gx1, gy1 ), glVertex2f( x1,-y1 )
glTexCoord2f( gx2, gy1 ), glVertex2f( x2,-y1 )
glTexCoord2f( gx2, gy2 ), glVertex2f( x2,-y2 )
glEnd( )
glTranslatef( max_tile_width,0,0)
glEndList( )
display_lists_for_chars[charcode]=dl_index
self.charcode2displaylist=display_lists_for_chars
def saveGlyphBitmap(self,file_name=None):
if file_name is None:
import os
#print 'CWD:',os.getcwd()
file_name=os.path.join(os.getcwd(),self.getID().lower().replace(u' ',u'_')+'.png')
from scipy import misc
if self.atlas is None:
self.loadAtlas()
if self.atlas.depth==1:
misc.imsave(file_name, self.atlas.data.reshape(self.atlas.data.shape[:2]))
else:
misc.imsave(file_name, self.atlas.data)
def __del__(self):
self._face=None
if self.atlas.texid:
glDeleteTextures(1, self.atlas.texid)
self.atlas.texid=None
self.atlas=None
if self.charcode2displaylist:
for dl in self.charcode2displaylist.values():
glDeleteLists(dl, 1)
self.charcode2displaylist.clear()
self.charcode2displaylist=None
if self.charcode2glyph:
self.charcode2glyph.clear()
self.charcode2glyph=None
if self.charcode2unichr:
self.charcode2unichr.clear()
self.charcode2unichr=None
class MonospaceFontAtlas(object):
def __init__(self, font_info, size, dpi):
self.font_info = font_info
self.size = size
self.dpi = dpi
self.id = self.getIdFromArgs(font_info, size, dpi)
self._face = Face(font_info.path)
self._face.set_char_size(height=self.size * 64, vres=self.dpi)
self.charcode2glyph = None
self.charcode2unichr = None
self.charcode2displaylist = None
self.max_ascender = None
self.max_descender = None
self.max_tile_width = None
self.max_tile_height = None
self.max_bitmap_size = None
self.total_bitmap_area = 0
self.atlas = None
def getID(self):
return self.id
@staticmethod
def getIdFromArgs(font_info, size, dpi):
return "%s_%d_%d" % (font_info.getID(), size, dpi)
def createFontAtlas(self):
if self.atlas:
self.atlas.free()
self.atlas = None
self.charcode2glyph = {}
self.charcode2unichr = {}
self.max_ascender = None
self.max_descender = None
self.max_tile_width = None
self.max_tile_height = None
self.max_bitmap_size = None
self.total_bitmap_area = 0
# load font glyphs and calculate max. char size.
# This is used when the altas is created to properly size the tex.
# i.e. max glyph size * num glyphs
max_w, max_h = 0, 0
max_ascender, max_descender, max_tile_width = 0, 0, 0
face = self._face
face.set_char_size(height=self.size * 64, vres=self.dpi)
# Create texAtlas for glyph set.
x_ppem = face.size.x_ppem
y_ppem = face.size.x_ppem
units_ppem = self.font_info.units_per_em
est_max_width = ((face.bbox.xMax - face.bbox.xMin) /
float(units_ppem) * x_ppem)
est_max_height = face.size.ascender / float(units_ppem) * y_ppem
target_atlas_area = int(
est_max_width * est_max_height) * face.num_glyphs
# make sure it is big enough. ;)
# height is trimmed before sending to video ram anyhow.
target_atlas_area = target_atlas_area * 3.0
pow2_area = nextPow2(target_atlas_area)
atlas_width = 2048
atlas_height = pow2_area / atlas_width
self.atlas = TextureAtlas(atlas_width, atlas_height * 2)
charcode, gindex = face.get_first_char()
while gindex:
uchar = chr(charcode)
if ud.category(uchar) not in (u'Zl', u'Zp', u'Cc', u'Cf', u'Cs',
u'Co', u'Cn'):
self.charcode2unichr[charcode] = uchar
face.load_char(uchar, FT_LOAD_RENDER | FT_LOAD_FORCE_AUTOHINT)
bitmap = face.glyph.bitmap
self.total_bitmap_area += bitmap.width * bitmap.rows
max_ascender = max(max_ascender, face.glyph.bitmap_top)
max_descender = max(max_descender,
bitmap.rows - face.glyph.bitmap_top)
max_tile_width = max(max_tile_width, bitmap.width)
max_w = max(bitmap.width, max_w)
max_h = max(bitmap.rows, max_h)
x, y, w, h = self.atlas.get_region(bitmap.width + 2,
bitmap.rows + 2)
if x < 0:
msg = ("MonospaceFontAtlas.get_region failed "
"for: {0}, requested area: {1}. Atlas Full!")
vals = charcode, (bitmap.width + 2, bitmap.rows + 2)
raise Exception(msg.format(vals))
x, y = x + 1, y + 1
w, h = w - 2, h - 2
data = np.array(bitmap._FT_Bitmap.buffer[:(bitmap.rows *
bitmap.width)],
dtype=np.ubyte).reshape(h, w, 1)
self.atlas.set_region((x, y, w, h), data)
self.charcode2glyph[charcode] = dict(
offset=(face.glyph.bitmap_left, face.glyph.bitmap_top),
size=(w, h),
atlas_coords=(x, y, w, h),
texcoords=[x, y, x + w, y + h],
index=gindex,
unichar=uchar)
charcode, gindex = face.get_next_char(charcode, gindex)
self.max_ascender = max_ascender
self.max_descender = max_descender
self.max_tile_width = max_tile_width
self.max_tile_height = max_ascender + max_descender
self.max_bitmap_size = max_w, max_h
# resize atlas
height = nextPow2(self.atlas.max_y + 1)
self.atlas.resize(height)
self.atlas.upload()
self.createDisplayLists()
self._face = None
def createDisplayLists(self):
glyph_count = len(self.charcode2unichr)
max_tile_width = self.max_tile_width
max_tile_height = self.max_tile_height
display_lists_for_chars = {}
base = glGenLists(glyph_count)
for i, (charcode, glyph) in enumerate(self.charcode2glyph.items()):
dl_index = base + i
uchar = self.charcode2unichr[charcode]
# update tex coords to reflect earlier resize of atlas height.
gx1, gy1, gx2, gy2 = glyph['texcoords']
gx1 = gx1 / float(self.atlas.width)
gy1 = gy1 / float(self.atlas.height)
gx2 = gx2 / float(self.atlas.width)
gy2 = gy2 / float(self.atlas.height)
glyph['texcoords'] = [gx1, gy1, gx2, gy2]
glNewList(dl_index, GL_COMPILE)
if uchar not in [u'\t', u'\n']:
glBegin(GL_QUADS)
x1 = glyph['offset'][0]
x2 = x1 + glyph['size'][0]
y1 = (self.max_ascender - glyph['offset'][1])
y2 = y1 + glyph['size'][1]
glTexCoord2f(gx1, gy2), glVertex2f(x1, -y2)
glTexCoord2f(gx1, gy1), glVertex2f(x1, -y1)
glTexCoord2f(gx2, gy1), glVertex2f(x2, -y1)
glTexCoord2f(gx2, gy2), glVertex2f(x2, -y2)
glEnd()
glTranslatef(max_tile_width, 0, 0)
glEndList()
display_lists_for_chars[charcode] = dl_index
self.charcode2displaylist = display_lists_for_chars
def saveGlyphBitmap(self, file_name=None):
if file_name is None:
import os
file_name = os.path.join(
os.getcwd(),
self.getID().lower().replace(u' ', u'_') + '.png')
from scipy import misc
if self.atlas is None:
self.loadAtlas()
if self.atlas.depth == 1:
misc.imsave(file_name,
self.atlas.data.reshape(self.atlas.data.shape[:2]))
else:
misc.imsave(file_name, self.atlas.data)
def __del__(self):
self._face = None
if self.atlas.texid is not None:
#glDeleteTextures(1, self.atlas.texid)
self.atlas.texid = None
self.atlas = None
if self.charcode2displaylist is not None:
# for dl in self.charcode2displaylist.values():
# glDeleteLists(dl, 1)
self.charcode2displaylist.clear()
self.charcode2displaylist = None
if self.charcode2glyph is not None:
self.charcode2glyph.clear()
self.charcode2glyph = None
if self.charcode2unichr is not None:
self.charcode2unichr.clear()
self.charcode2unichr = None
