43 lines
732 B
C
43 lines
732 B
C
/*
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* Copyright (c) 2022, yzrh <yzrh@noema.org>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "cnki_jbig.h"
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#include "jbig2.h"
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int
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cnki_jbig2(char **bitmap, int *bitmap_size,
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int *bitmap_width, int *bitmap_height,
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const char * restrict jbig, int jbig_size)
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{
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dib_t *dib = malloc(sizeof(dib_t));
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if (dib == NULL)
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return 1;
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memcpy(dib, jbig, 40);
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int width_padded = (dib->width * dib->depth + 7) / 8;
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*bitmap_size = dib->height * width_padded;
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*bitmap = malloc(*bitmap_size);
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if (*bitmap == NULL) {
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free(dib);
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return 1;
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}
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strdec_jbig2(bitmap, jbig + 48, jbig_size - 48);
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*bitmap_width = dib->width;
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*bitmap_height = dib->height;
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free(dib);
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return 0;
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}
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