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Dunedan
c49d4eedd0
To improve quality und uniformity of the included Python code this lints and formats the included Python files with ruff.
74 lines
2.3 KiB
Python
74 lines
2.3 KiB
Python
# Adapted from http://cairographics.org/freetypepython/
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import ctypes
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import cairo
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import sys
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CAIRO_STATUS_SUCCESS = 0
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FT_Err_Ok = 0
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FT_LOAD_DEFAULT = 0x0
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FT_LOAD_NO_HINTING = 0x2
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FT_LOAD_FORCE_AUTOHINT = 0x20
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FT_LOAD_NO_AUTOHINT = 0x8000
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# find required libraries (platform specific)
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if sys.platform == "win32":
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ft_lib = "freetype6.dll"
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lc_lib = "libcairo-2.dll"
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else:
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ft_lib = "libfreetype.so.6"
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lc_lib = "libcairo.so.2"
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_freetype_so = ctypes.CDLL(ft_lib)
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_cairo_so = ctypes.CDLL(lc_lib)
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_cairo_so.cairo_ft_font_face_create_for_ft_face.restype = ctypes.c_void_p
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_cairo_so.cairo_ft_font_face_create_for_ft_face.argtypes = [ctypes.c_void_p, ctypes.c_int]
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_cairo_so.cairo_set_font_face.argtypes = [ctypes.c_void_p, ctypes.c_void_p]
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_cairo_so.cairo_font_face_status.argtypes = [ctypes.c_void_p]
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_cairo_so.cairo_status.argtypes = [ctypes.c_void_p]
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# initialize freetype
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_ft_lib = ctypes.c_void_p()
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if FT_Err_Ok != _freetype_so.FT_Init_FreeType(ctypes.byref(_ft_lib)):
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raise Exception("Error initialising FreeType library.")
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_surface = cairo.ImageSurface(cairo.FORMAT_A8, 0, 0)
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class PycairoContext(ctypes.Structure):
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_fields_ = [
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("PyObject_HEAD", ctypes.c_byte * object.__basicsize__),
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("ctx", ctypes.c_void_p),
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("base", ctypes.c_void_p),
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]
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def create_cairo_font_face_for_file(filename, faceindex=0, loadoptions=0):
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# create freetype face
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ft_face = ctypes.c_void_p()
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cairo_ctx = cairo.Context(_surface)
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cairo_t = PycairoContext.from_address(id(cairo_ctx)).ctx
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if FT_Err_Ok != _freetype_so.FT_New_Face(
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_ft_lib, filename.encode("ascii"), faceindex, ctypes.byref(ft_face)
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):
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raise Exception("Error creating FreeType font face for " + filename)
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# create cairo font face for freetype face
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cr_face = _cairo_so.cairo_ft_font_face_create_for_ft_face(ft_face, loadoptions)
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if CAIRO_STATUS_SUCCESS != _cairo_so.cairo_font_face_status(cr_face):
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raise Exception("Error creating cairo font face for " + filename)
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_cairo_so.cairo_set_font_face(cairo_t, cr_face)
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if CAIRO_STATUS_SUCCESS != _cairo_so.cairo_status(cairo_t):
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raise Exception("Error creating cairo font face for " + filename)
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face = cairo_ctx.get_font_face()
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def indexes(char):
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return _freetype_so.FT_Get_Char_Index(ft_face, ord(char))
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return (face, indexes)
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