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/* See LICENSE file for copyright and license details. */
#include "common.h"
int
libparsepcf_get_bitmaps(const void *file, size_t size,
const struct libparsepcf_table *table,
struct libparsepcf_bitmaps *meta)
{
const char *text = file;
size_t pos, glyph_pad;
int msb = table->format & LIBPARSEPCF_BYTE;
(void) size;
if (table->size < 8)
goto ebfont;
pos = table->offset;
if (table->format != libparsepcf_parse_lsb_uint32__(&text[pos]))
goto ebfont;
pos += 4;
meta->glyph_count = (size_t)PARSE_UINT32(&text[pos], msb);
pos += 4;
if (16 > table->size - (pos - table->offset) ||
meta->glyph_count > (table->size - (pos - table->offset) - 16) / 4)
goto ebfont;
pos += meta->glyph_count * 4;
glyph_pad = (size_t)(table->format & LIBPARSEPCF_GLYPH_PAD_MASK);
meta->bitmap_size = (size_t)PARSE_UINT32(&text[pos + 4 * glyph_pad], msb);
pos += 16;
meta->bitmap_data = (const void *)&text[pos];
if (meta->bitmap_size > table->size - (pos - table->offset))
goto ebfont;
meta->bit_packing = (size_t)1 << ((table->format & LIBPARSEPCF_SCAN_UNIT_MASK) >> 4);
meta->row_padding = (size_t)1 << ((table->format & LIBPARSEPCF_GLYPH_PAD_MASK) >> 0);
meta->lsbyte = !!(table->format & LIBPARSEPCF_BYTE);
meta->lsbit = !!(table->format & LIBPARSEPCF_BIT);
if (meta->row_padding < meta->bit_packing)
goto ebfont;
return 0;
ebfont:
errno = EBFONT;
return -1;
}
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