mirror of
https://gitea.wildfiregames.com/0ad/0ad
synced 2026-06-16 21:34:08 -07:00
7dca91f26b
Rewrite font builder tool to be much simpler and to support more text effects. Change GUI to use new set of fonts. Switch font textures from TGA to PNG so they're easier for the font builder to create. Support RGBA font textures (for e.g. stroked text). Greatly improve text rendering performance by using vertex arrays. Fix rendering code leaving vertex buffers bound. Add 'clip' property to GUI text objects, to disable clipping when rendering. Delete part of unused console function registration system. This was SVN commit r7595.
49 lines
1.7 KiB
Python
49 lines
1.7 KiB
Python
# Adapted from http://cairographics.org/freetypepython/
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# TODO: Windows compatibility
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import ctypes
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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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# find shared objects
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_freetype_so = ctypes.CDLL ("libfreetype.so.6")
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_cairo_so = ctypes.CDLL ("libcairo.so.2")
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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 "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_ = [("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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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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_cairo_so.cairo_ft_font_face_create_for_ft_face.restype = ctypes.c_void_p
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if FT_Err_Ok != _freetype_so.FT_New_Face (_ft_lib, filename, faceindex, ctypes.byref(ft_face)):
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raise "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 "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 "Error creating cairo font face for " + filename
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face = cairo_ctx.get_font_face ()
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indexes = lambda char: _freetype_so.FT_Get_Char_Index(ft_face, ord(char))
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return (face, indexes)
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