214 lines
7.8 KiB
Cython
214 lines
7.8 KiB
Cython
cdef extern from "stdlib.h":
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ctypedef int size_t
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void *malloc(size_t size)
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void free(void* ptr)
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cdef extern from "ft2build.h" :
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pass
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cdef extern from "freetype/freetype.h" :
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ctypedef void *FT_Library
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ctypedef void *FT_Face
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ctypedef int FT_Error
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FT_Error FT_Init_FreeType (FT_Library *alib)
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FT_Error FT_Done_FreeType (FT_Library alib)
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FT_Error FT_Done_Face (FT_Face alib)
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FT_Error FT_New_Face( FT_Library library, char *path, unsigned long index, FT_Face *aface)
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FT_Error FT_Set_Char_Size (FT_Face aFace, unsigned int size_x, unsigned int size_y, unsigned int res_x, unsigned int res_y)
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cdef extern from "hb-common.h" :
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cdef enum hb_direction_t :
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HB_DIRECTION_LTR
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HB_DIRECTION_RTL
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HB_DIRECTION_TTB
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HB_DIRECTION_BTT
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ctypedef unsigned long hb_codepoint_t
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ctypedef long hb_position_t
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ctypedef unsigned long hb_mask_t
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ctypedef unsigned long hb_tag_t
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hb_tag_t hb_tag_from_string (char *s)
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ctypedef void (*hb_destroy_func_t) (void *user_data)
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ctypedef void *hb_language_t
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hb_language_t hb_language_from_string(char *str)
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char * hb_language_to_string(hb_language_t language)
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cdef extern from "hb-unicode.h" :
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# there must be a better way of syncing this list with the true source
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ctypedef enum hb_script_t :
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HB_SCRIPT_COMMON = 0
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cdef extern from "hb-ot-tag.h" :
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hb_script_t hb_ot_tag_to_script (hb_tag_t tag)
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cdef extern from "hb-buffer.h" :
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ctypedef struct hb_buffer_t :
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pass
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ctypedef struct hb_glyph_info_t :
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hb_codepoint_t codepoint
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hb_mask_t mask
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unsigned long cluster
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ctypedef union hb_var_int_t:
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unsigned long u32
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ctypedef struct hb_glyph_position_t :
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hb_position_t x_advance
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hb_position_t y_advance
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hb_position_t x_offset
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hb_position_t y_offset
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hb_var_int_t var
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hb_buffer_t *hb_buffer_create(unsigned int size)
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hb_buffer_t *hb_buffer_reference(hb_buffer_t *buffer)
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unsigned int hb_buffer_get_reference_count(hb_buffer_t *buffer)
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void hb_buffer_destroy(hb_buffer_t *buffer)
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void hb_buffer_set_direction(hb_buffer_t *buffer, hb_direction_t direction)
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hb_direction_t hb_buffer_get_direction(hb_buffer_t *buffer)
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void hb_buffer_set_script(hb_buffer_t *buffer, hb_script_t script)
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hb_script_t hb_buffer_get_script(hb_buffer_t *buffer)
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void hb_buffer_set_language(hb_buffer_t *buffer, hb_language_t language)
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hb_language_t hb_buffer_get_language(hb_buffer_t *buffer)
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void hb_buffer_clear(hb_buffer_t *)
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void hb_buffer_clear_positions(hb_buffer_t *buffer)
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void hb_buffer_ensure(hb_buffer_t *buffer, unsigned int size)
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void hb_buffer_reverse(hb_buffer_t *buffer)
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void hb_buffer_reverse_clusters(hb_buffer_t *buffer)
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void hb_buffer_add_glyph(hb_buffer_t *buffer, hb_codepoint_t codepoint, hb_mask_t mask, unsigned int cluster)
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void hb_buffer_add_utf8(hb_buffer_t *buffer, char *text, unsigned int text_length, unsigned int item_offset, unsigned int item_length)
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unsigned int hb_buffer_get_length(hb_buffer_t *buffer)
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hb_glyph_info_t *hb_buffer_get_glyph_infos(hb_buffer_t *buffer, unsigned int *len)
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hb_glyph_position_t *hb_buffer_get_glyph_positions(hb_buffer_t *buffer, unsigned int *len)
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cdef extern from "hb-blob.h" :
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cdef struct hb_blob_t :
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pass
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# do I need blob functions here?
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cdef extern from "hb-font.h" :
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ctypedef struct hb_face_t :
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pass
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ctypedef struct hb_font_t :
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pass
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ctypedef hb_blob_t * (*hb_get_table_func_t) (hb_tag_t tag, void *user_data)
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hb_face_t * hb_face_create_for_data(hb_blob_t *blob, unsigned int index)
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hb_face_t * hb_face_create_for_tables(hb_get_table_func_t get_table, hb_destroy_func_t destroy, void *user_data)
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hb_face_t * hb_face_reference(hb_face_t *face)
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unsigned int hb_face_get_reference_count(hb_face_t *face)
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void hb_face_destroy(hb_face_t *face)
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void hb_font_destroy(hb_font_t *font)
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hb_blob_t * hb_face_get_table(hb_face_t *face, hb_tag_t tag)
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cdef extern from "hb-shape.h" :
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ctypedef struct hb_feature_t :
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int tag
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unsigned int value
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unsigned int start
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unsigned int end
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void hb_shape (hb_font_t *font, hb_buffer_t *buffer, hb_feature_t *features, unsigned int num_features)
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cdef extern from "hb-ft.h" :
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hb_face_t *hb_ft_face_create (FT_Face ft_face, hb_destroy_func_t destroy)
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hb_font_t *hb_ft_font_create (FT_Face ft_face, hb_destroy_func_t destroy)
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class glyphinfo :
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def __init__(self, gid, cluster, advance, offset, internal = 0) :
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self.gid = gid
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self.cluster = cluster
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self.advance = advance
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self.offset = offset
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self.internal = internal
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def __repr__(self) :
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res = "{0:d}>{1:d}@({2:.2f},{3:.2f})+({4:.2f},{5:.2f})".format(self.gid, self.cluster, self.offset[0], self.offset[1], self.advance[0], self.advance[1])
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if self.internal : res += "/i=" + str(self.internal)
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return res
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cdef class buffer :
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cdef hb_buffer_t *buffer
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def __init__(self, char *text, unsigned int length) :
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"""Note text must be a utf-8 string and length is number of chars"""
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self.buffer = hb_buffer_create(length)
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hb_buffer_add_utf8(self.buffer, text, length, 0, len(text))
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def set_scriptlang(self, char *script, char *lang) :
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cdef hb_language_t language
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cdef hb_script_t scriptnum
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language = hb_language_from_string(lang)
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scriptnum = hb_ot_tag_to_script(hb_tag_from_string(script))
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hb_buffer_set_script(self.buffer, scriptnum)
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hb_buffer_set_language(self.buffer, language)
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def get_info(self, scale = 1) :
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cdef hb_glyph_info_t *infos
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cdef hb_glyph_position_t *positions
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cdef unsigned int num
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cdef unsigned int i
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res = []
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num = hb_buffer_get_length(self.buffer)
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infos = hb_buffer_get_glyph_infos(self.buffer, &num)
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positions = hb_buffer_get_glyph_positions(self.buffer, &num)
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for 0 <= i < num :
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temp = glyphinfo(infos[i].codepoint, infos[i].cluster, (positions[i].x_advance / scale, positions[i].y_advance / scale), (positions[i].x_offset / scale, positions[i].y_offset / scale), positions[i].var.u32)
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res.append(temp)
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return res
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def get_settings(self) :
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cdef hb_script_t script
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cdef hb_language_t lang
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script = hb_buffer_get_script(self.buffer)
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lang = hb_buffer_get_language(self.buffer)
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return {'script' : script, 'language' : hb_language_to_string(lang)}
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def __del__(self) :
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hb_buffer_destroy(self.buffer)
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cdef class ft :
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cdef FT_Library engine
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cdef FT_Face face
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cdef hb_face_t *hbface
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cdef hb_font_t *hbfont
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def __init__(self, char *fname, size) :
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cdef FT_Library engine
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FT_Init_FreeType(&engine)
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self.engine = engine
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cdef FT_Face face
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FT_New_Face(engine, fname, 0, &face)
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FT_Set_Char_Size(face, size << 6, size << 6, 72, 72)
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self.face = face
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self.hbface = hb_ft_face_create(face, <void (*)(void *)>hb_face_destroy)
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self.hbfont = hb_ft_font_create(face, <void (*)(void *)>hb_font_destroy)
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def __del__(self) :
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cdef FT_Library engine
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engine = self.engine
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cdef FT_Face face
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face = self.face
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FT_Done_Face(face)
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FT_Done_FreeType(engine)
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def shape(self, buffer aBuffer, features = {}) :
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cdef hb_feature_t *feats
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cdef hb_feature_t *aFeat
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feats = <hb_feature_t *>malloc(sizeof(hb_feature_t) * len(features))
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aFeat = feats
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for k,v in features.items() :
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aFeat.tag = hb_tag_from_string (k)
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aFeat.value = int(v)
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aFeat.start = 0
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aFeat.end = -1
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aFeat += 1
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hb_shape(self.hbfont, aBuffer.buffer, feats, len(features))
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