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81 lines
1.3 KiB
C
81 lines
1.3 KiB
C
/*
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* The Python Imaging Library.
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* $Id$
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*
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* encoder for EPS hex data
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*
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* history:
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* 96-04-19 fl created
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* 96-06-27 fl don't drop last block of encoded data
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*
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* notes:
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* FIXME: rename to HexEncode.c ??
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*
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* Copyright (c) Fredrik Lundh 1996.
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* Copyright (c) Secret Labs AB 1997.
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*
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* See the README file for information on usage and redistribution.
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*/
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#include "Imaging.h"
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int
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ImagingEpsEncode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
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{
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enum { HEXBYTE=1, NEWLINE };
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const char *hex = "0123456789abcdef";
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UINT8* ptr = buf;
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UINT8* in, i;
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if (!state->state) {
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state->state = HEXBYTE;
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state->xsize *= im->pixelsize; /* Hack! */
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}
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in = (UINT8*) im->image[state->y];
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for (;;) {
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if (state->state == NEWLINE) {
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if (bytes < 1)
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break;
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*ptr++ = '\n';
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bytes--;
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state->state = HEXBYTE;
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}
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if (bytes < 2)
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break;
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i = in[state->x++];
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*ptr++ = hex[(i>>4)&15];
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*ptr++ = hex[i&15];
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bytes -= 2;
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/* Skip junk bytes */
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if (im->bands == 3 && (state->x & 3) == 3)
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state->x++;
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if (++state->count >= 79/2) {
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state->state = NEWLINE;
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state->count = 0;
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}
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if (state->x >= state->xsize) {
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state->x = 0;
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if (++state->y >= state->ysize) {
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state->errcode = IMAGING_CODEC_END;
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break;
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}
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in = (UINT8*) im->image[state->y];
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}
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}
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return ptr - buf;
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}
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