(search_file_line): Fix skipping of whitespace.
(get_quoted_string): Fix limit on memchr search. (set_bdf_font_info): Use unsigned chars. Negate yoffset. (w32_init_bdf_font): Initialize codepoint and bitmap heaps. (w32_free_bdf_font): Free bitmaps and codepoints on heaps. (get_cached_font_char, cache_char_offset): Use macro BDF_CODEPOINT_RANGE_COVER_P. (cache_char_offset): Use HeapAlloc to allocate codepoints on own heap. (clear_cached_bitmap_slots): New function. (GET_HEX_VALUE): G-Z, g-z are not hex. (w32_get_bdf_glyph): Convert to DIB format. Return bytes read. (get_bitmap_with_cache): Use new cache implementation. (create_offscreen_bitmap): New function. (w32_BDF_TextOut): Use it. Draw glyphs as DIBs.
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