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#include "mupdf/fitz.h"

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/* This code needs to be kept out of stm_buffer.c to avoid it being

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 * pulled into cmapdump.c */

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void

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fz_drop_compressed_buffer(fz_context *ctx, fz_compressed_buffer *buf)

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{

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	if (!buf)

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		return;

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	fz_drop_buffer(ctx, buf->buffer);

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	fz_free(ctx, buf);

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}

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fz_stream *

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fz_open_image_decomp_stream_from_buffer(fz_context *ctx, fz_compressed_buffer *buffer, int *l2factor)

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{

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	fz_stream *chain = fz_open_buffer(ctx, buffer->buffer);

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	return fz_open_image_decomp_stream(ctx, chain, &buffer->params, l2factor);

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}

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fz_stream *

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fz_open_image_decomp_stream(fz_context *ctx, fz_stream *chain, fz_compression_params *params, int *l2factor)

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{

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	switch (params->type)

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	{

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	case FZ_IMAGE_FAX:

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		if (l2factor)

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			*l2factor = 0;

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		return fz_open_faxd(ctx, chain,

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				params->u.fax.k,

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				params->u.fax.end_of_line,

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				params->u.fax.encoded_byte_align,

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				params->u.fax.columns,

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				params->u.fax.rows,

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				params->u.fax.end_of_block,

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				params->u.fax.black_is_1);

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	case FZ_IMAGE_JPEG:

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		if (l2factor && *l2factor > 3)

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			*l2factor = 3;

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		return fz_open_dctd(ctx, chain, params->u.jpeg.color_transform, l2factor ? *l2factor : 0, NULL);

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	case FZ_IMAGE_RLD:

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		if (l2factor)

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			*l2factor = 0;

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		return fz_open_rld(ctx, chain);

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	case FZ_IMAGE_FLATE:

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		if (l2factor)

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			*l2factor = 0;

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		chain = fz_open_flated(ctx, chain, 15);

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		if (params->u.flate.predictor > 1)

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			chain = fz_open_predict(ctx, chain, params->u.flate.predictor, params->u.flate.columns, params->u.flate.colors, params->u.flate.bpc);

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		return chain;

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	case FZ_IMAGE_LZW:

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		if (l2factor)

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			*l2factor = 0;

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		chain = fz_open_lzwd(ctx, chain, params->u.lzw.early_change);

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		if (params->u.lzw.predictor > 1)

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			chain = fz_open_predict(ctx, chain, params->u.lzw.predictor, params->u.lzw.columns, params->u.lzw.colors, params->u.lzw.bpc);

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		return chain;

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	default:

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		if (l2factor)

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			*l2factor = 0;

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		break;

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	}

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	return chain;

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}

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fz_stream *

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fz_open_compressed_buffer(fz_context *ctx, fz_compressed_buffer *buffer)

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{

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	int l2factor = 0;

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	return fz_open_image_decomp_stream_from_buffer(ctx, buffer, &l2factor);

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}

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unsigned int

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fz_compressed_buffer_size(fz_compressed_buffer *buffer)

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{

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	if (!buffer || !buffer->buffer)

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		return 0;

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	return (unsigned int)buffer->buffer->cap;

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}

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