/*
* \brief Create and initialize a new drawing and return it
*/
ASS_Drawing *ass_drawing_new(void *fontconfig_priv, ASS_Font *font,
ASS_Hinting hint, FT_Library lib)
{
ASS_Drawing *drawing;
drawing = calloc(1, sizeof(*drawing));
drawing->text = calloc(1, DRAWING_INITIAL_SIZE);
drawing->size = DRAWING_INITIAL_SIZE;
drawing->ftlibrary = lib;
if (font) {
drawing->library = font->library;
drawing_make_glyph(drawing, fontconfig_priv, font, hint);
}
drawing->scale_x = 1.;
drawing->scale_y = 1.;
drawing->max_contours = GLYPH_INITIAL_CONTOURS;
drawing->max_points = GLYPH_INITIAL_POINTS;
return drawing;
}
/*
* \brief Convert token list to outline. Calls the line and curve evaluators.
*/
FT_OutlineGlyph *ass_drawing_parse(ASS_Drawing *drawing, int raw_mode)
{
int started = 0;
ASS_DrawingToken *token;
FT_Vector pen = {0, 0};
if (drawing->font)
drawing_make_glyph(drawing, drawing->fontconfig_priv, drawing->font);
if (!drawing->glyph)
return NULL;
drawing->tokens = drawing_tokenize(drawing->text);
drawing_prepare(drawing);
token = drawing->tokens;
while (token) {
// Draw something according to current command
switch (token->type) {
case TOKEN_MOVE_NC:
pen = token->point;
translate_point(drawing, &pen);
token = token->next;
break;
case TOKEN_MOVE:
pen = token->point;
translate_point(drawing, &pen);
if (started) {
drawing_close_shape(drawing);
started = 0;
}
token = token->next;
break;
case TOKEN_LINE: {
FT_Vector to;
to = token->point;
translate_point(drawing, &to);
if (!started) drawing_add_point(drawing, &pen);
drawing_add_point(drawing, &to);
started = 1;
token = token->next;
break;
}
case TOKEN_CUBIC_BEZIER:
if (token_check_values(token, 3, TOKEN_CUBIC_BEZIER) &&
token->prev) {
drawing_evaluate_curve(drawing, token->prev, 0, started);
token = token->next;
token = token->next;
token = token->next;
started = 1;
} else
token = token->next;
break;
case TOKEN_B_SPLINE:
if (token_check_values(token, 3, TOKEN_B_SPLINE) &&
token->prev) {
drawing_evaluate_curve(drawing, token->prev, 1, started);
token = token->next;
started = 1;
} else
token = token->next;
break;
default:
token = token->next;
break;
}
}
drawing_finish(drawing, raw_mode);
drawing_free_tokens(drawing->tokens);
return &drawing->glyph;
}
