mirror of
https://gitea.wildfiregames.com/0ad/0ad
synced 2026-06-16 05:13:58 -07:00
0ea6d32fa5
This commit enables a bunch of unrelated ruff rules, which only require minimal changes to the code base to enable them. The rules enabled by this commit are: - check the use of datetime objects without timezone (DTZ005) - check the performance of try-except in loops (PERF203) - check the number of function arguments (PLR0913) - check for mutable class defaults (RUF012) - check for the use of secure hashing algorithms (S324) - check for raising base exceptions (TRY002) - check for raising other exceptions where TypeErrors should be raised (TRY004)
78 lines
2.4 KiB
Python
78 lines
2.4 KiB
Python
# Adapted from http://cairographics.org/freetypepython/
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# ruff: noqa: TRY002
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import ctypes
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import sys
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from typing import ClassVar
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import cairo
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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_: ClassVar = [
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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_so.cairo_font_face_status(cr_face) != CAIRO_STATUS_SUCCESS:
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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_so.cairo_status(cairo_t) != CAIRO_STATUS_SUCCESS:
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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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