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