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#include "mupdf/fitz.h"
/* This code needs to be kept out of stm_buffer.c to avoid it being
* pulled into cmapdump.c */
void
fz_drop_compressed_buffer(fz_context *ctx, fz_compressed_buffer *buf)
{
if (!buf)
return;
fz_drop_buffer(ctx, buf->buffer);
fz_free(ctx, buf);
}
fz_stream *
fz_open_image_decomp_stream_from_buffer(fz_context *ctx, fz_compressed_buffer *buffer, int *l2factor)
{
fz_stream *chain = fz_open_buffer(ctx, buffer->buffer);
return fz_open_image_decomp_stream(ctx, chain, &buffer->params, l2factor);
}
fz_stream *
fz_open_image_decomp_stream(fz_context *ctx, fz_stream *chain, fz_compression_params *params, int *l2factor)
{
int our_l2factor = 0;
switch (params->type)
{
case FZ_IMAGE_FAX:
return fz_open_faxd(ctx, chain,
params->u.fax.k,
params->u.fax.end_of_line,
params->u.fax.encoded_byte_align,
params->u.fax.columns,
params->u.fax.rows,
params->u.fax.end_of_block,
params->u.fax.black_is_1);
case FZ_IMAGE_JPEG:
if (l2factor)
{
our_l2factor = *l2factor;
if (our_l2factor > 3)
our_l2factor = 3;
*l2factor -= our_l2factor;
}
return fz_open_dctd(ctx, chain, params->u.jpeg.color_transform, our_l2factor, NULL);
case FZ_IMAGE_RLD:
return fz_open_rld(ctx, chain);
case FZ_IMAGE_FLATE:
chain = fz_open_flated(ctx, chain, 15);
if (params->u.flate.predictor > 1)
chain = fz_open_predict(ctx, chain, params->u.flate.predictor, params->u.flate.columns, params->u.flate.colors, params->u.flate.bpc);
return chain;
case FZ_IMAGE_LZW:
chain = fz_open_lzwd(ctx, chain, params->u.lzw.early_change, 9);
if (params->u.lzw.predictor > 1)
chain = fz_open_predict(ctx, chain, params->u.lzw.predictor, params->u.lzw.columns, params->u.lzw.colors, params->u.lzw.bpc);
return chain;
default:
break;
}
return chain;
}
fz_stream *
fz_open_compressed_buffer(fz_context *ctx, fz_compressed_buffer *buffer)
{
int l2factor = 0;
return fz_open_image_decomp_stream_from_buffer(ctx, buffer, &l2factor);
}
unsigned int
fz_compressed_buffer_size(fz_compressed_buffer *buffer)
{
if (!buffer || !buffer->buffer)
return 0;
return (unsigned int)buffer->buffer->cap;
}
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