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435a566751
* sumatrapdf - vendor import * everything compiles (libjpeg, poppler, fitz, sumatrapdf) * does NOT link (remove the comment tags in the parent directory.rbuild file (rosapps dir) to build it) svn path=/trunk/; revision=29295
130 lines
2.2 KiB
C
130 lines
2.2 KiB
C
#include "fitz-base.h"
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#include "fitz-stream.h"
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#define noDEBUG 1
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typedef struct fz_pipeline_s fz_pipeline;
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fz_error * fz_processpipeline(fz_filter *filter, fz_buffer *in, fz_buffer *out);
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struct fz_pipeline_s
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{
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fz_filter super;
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fz_filter *head;
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fz_buffer *buffer;
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fz_filter *tail;
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int tailneedsin;
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};
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fz_error *
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fz_chainpipeline(fz_filter **fp, fz_filter *head, fz_filter *tail, fz_buffer *buf)
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{
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FZ_NEWFILTER(fz_pipeline, p, pipeline);
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p->head = fz_keepfilter(head);
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p->tail = fz_keepfilter(tail);
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p->tailneedsin = 1;
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p->buffer = fz_keepbuffer(buf);
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return nil;
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}
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void
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fz_unchainpipeline(fz_filter *filter, fz_filter **oldfp, fz_buffer **oldbp)
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{
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fz_pipeline *p = (fz_pipeline*)filter;
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*oldfp = fz_keepfilter(p->head);
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*oldbp = fz_keepbuffer(p->buffer);
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fz_dropfilter(filter);
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}
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fz_error *
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fz_newpipeline(fz_filter **fp, fz_filter *head, fz_filter *tail)
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{
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fz_error *error;
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FZ_NEWFILTER(fz_pipeline, p, pipeline);
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p->head = fz_keepfilter(head);
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p->tail = fz_keepfilter(tail);
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p->tailneedsin = 1;
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error = fz_newbuffer(&p->buffer, FZ_BUFSIZE);
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if (error) { fz_free(p); return error; }
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return nil;
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}
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void
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fz_droppipeline(fz_filter *filter)
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{
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fz_pipeline *p = (fz_pipeline*)filter;
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fz_dropfilter(p->head);
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fz_dropfilter(p->tail);
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fz_dropbuffer(p->buffer);
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}
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fz_error *
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fz_processpipeline(fz_filter *filter, fz_buffer *in, fz_buffer *out)
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{
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fz_pipeline *p = (fz_pipeline*)filter;
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fz_error *e;
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if (p->buffer->eof)
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goto tail;
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if (p->tailneedsin && p->head->produced)
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goto tail;
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head:
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e = fz_process(p->head, in, p->buffer);
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if (e == fz_ioneedin)
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return fz_ioneedin;
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else if (e == fz_ioneedout)
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{
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if (p->tailneedsin && !p->head->produced)
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{
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fz_error *be = nil;
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if (p->buffer->rp > p->buffer->bp)
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be = fz_rewindbuffer(p->buffer);
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else
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be = fz_growbuffer(p->buffer);
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if (be)
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return be;
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goto head;
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}
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goto tail;
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}
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else if (e == fz_iodone)
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goto tail;
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else
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return e;
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tail:
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e = fz_process(p->tail, p->buffer, out);
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if (e == fz_ioneedin)
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{
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if (p->buffer->eof)
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return fz_throw("ioerror: premature eof in pipeline");
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p->tailneedsin = 1;
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goto head;
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}
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else if (e == fz_ioneedout)
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{
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p->tailneedsin = 0;
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return fz_ioneedout;
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}
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else if (e == fz_iodone)
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return fz_iodone;
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else
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return e;
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}
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