def fromscalerdata(cls, glyphbitmap, bitDepth):
"""
Initializes a Format6 from glyphbitmap, which should be an object
similar to ScalerInterface's 'GlyphBitmap', having 'metrics' and 'bits'
attributes.
"""
mtx = glyphbitmap.metrics
m = bigglyphmetrics.BigGlyphMetrics(
height=mtx.height,
width=mtx.width,
horiBearingX=mtx.lo_x,
horiBearingY=mtx.hi_y + 1, # convert from pixel to edge
horiAdvance=mtx.i_dx)
w = walker.StringWalker(glyphbitmap.bits)
v = [
utilities.explodeRow(w.chunk(mtx.bpl), bitDepth, m.width)
for _ in range(m.height)
]
b = bitmap.Bitmap(v,
lo_x=m.horiBearingX,
hi_y=m.horiBearingY,
bitDepth=bitDepth)
r = cls(image=b, metrics=m)
return r
# -----------------------------------------------------------------------------
#
# Test code
#
if 0:
def __________________():
pass
if __debug__:
from fontio3 import utilities
_testingValues = (Format18(),
Format18(metrics=bigglyphmetrics.BigGlyphMetrics(
7, 8, 1, 0, 10, -3, -1, 9),
image=b'\x01' * 23)) # not real PNG data
def _test():
import doctest
doctest.testmod()
if __name__ == "__main__":
if __debug__:
_test()
#
# Test code
#
if 0:
def __________________():
pass
if __debug__:
from fontio3 import utilities
_testingValues = (Format6(),
Format6(metrics=bigglyphmetrics.BigGlyphMetrics(
7, 8, 1, 0, 10, -3, -1, 9),
image=bitmap.Bitmap([[1, 0, 0, 0, 0, 0, 0, 1],
[0, 1, 0, 0, 0, 0, 1, 0],
[0, 0, 1, 0, 0, 1, 0, 0],
[0, 0, 0, 1, 1, 0, 0, 0],
[0, 0, 0, 1, 1, 0, 0, 0],
[0, 0, 1, 0, 0, 1, 0, 0],
[0, 1, 0, 0, 0, 0, 1, 0]],
lo_x=1,
hi_y=0,
bitDepth=1)),
Format6(metrics=bigglyphmetrics.BigGlyphMetrics(
3, 3, 1, 3, 5, -1, -1, 5),
image=bitmap.Bitmap(
[[7, 4, 7], [4, 1, 4], [7, 4, 7]],
lo_x=1,