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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
117 lines
2.5 KiB
C
117 lines
2.5 KiB
C
#include "fitz-base.h"
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#include "fitz-stream.h"
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/* TODO: complete rewrite with error checking and use fitz memctx */
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/*
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<rillian> so to use a global_ctx, you run your global data through a normal ctx
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<rillian> then call jbig2_make_global_ctx with the normal context
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<rillian> that does the (currently null) conversion
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<maskros> make_global_ctx after i fed it all the global stream data?
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<rillian> maskros: yes
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<rillian> and you pass the new global ctx object to jbig2_ctx_new() when you
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+create the per-page ctx
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*/
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#ifdef WIN32 /* Microsoft Visual C++ */
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typedef signed char int8_t;
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typedef short int int16_t;
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typedef int int32_t;
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typedef __int64 int64_t;
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typedef unsigned char uint8_t;
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typedef unsigned short int uint16_t;
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typedef unsigned int uint32_t;
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#else
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#include <inttypes.h>
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#endif
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#include <jbig2.h>
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typedef struct fz_jbig2d_s fz_jbig2d;
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struct fz_jbig2d_s
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{
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fz_filter super;
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Jbig2Ctx *ctx;
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Jbig2GlobalCtx *gctx;
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Jbig2Image *page;
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int idx;
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};
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fz_error *
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fz_newjbig2d(fz_filter **fp, fz_obj *params)
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{
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FZ_NEWFILTER(fz_jbig2d, d, jbig2d);
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d->ctx = jbig2_ctx_new(nil, JBIG2_OPTIONS_EMBEDDED, nil, nil, nil);
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d->page = nil;
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d->idx = 0;
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return nil;
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}
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void
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fz_dropjbig2d(fz_filter *filter)
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{
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fz_jbig2d *d = (fz_jbig2d*)filter;
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jbig2_ctx_free(d->ctx);
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}
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fz_error *
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fz_setjbig2dglobalstream(fz_filter *filter, unsigned char *buf, int len)
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{
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fz_jbig2d *d = (fz_jbig2d*)filter;
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jbig2_data_in(d->ctx, buf, len);
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d->gctx = jbig2_make_global_ctx(d->ctx);
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d->ctx = jbig2_ctx_new(nil, JBIG2_OPTIONS_EMBEDDED, d->gctx, nil, nil);
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return nil;
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}
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fz_error *
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fz_processjbig2d(fz_filter *filter, fz_buffer *in, fz_buffer *out)
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{
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fz_jbig2d *d = (fz_jbig2d*)filter;
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int len;
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int i;
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while (1)
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{
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if (in->rp == in->wp) {
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if (!in->eof)
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return fz_ioneedin;
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if (!d->page) {
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jbig2_complete_page(d->ctx);
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d->page = jbig2_page_out(d->ctx);
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}
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if (out->wp == out->ep)
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return fz_ioneedout;
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len = out->ep - out->wp;
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if (d->idx + len > d->page->height * d->page->stride)
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len = d->page->height * d->page->stride - d->idx;
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/* XXX memcpy(out->wp, d->page->data + d->idx, len); */
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for (i = 0; i < len; i++)
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out->wp[i] = ~ d->page->data[d->idx + i];
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out->wp += len;
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d->idx += len;
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if (d->idx == d->page->height * d->page->stride) {
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jbig2_release_page(d->ctx, d->page);
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out->eof = 1;
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return fz_iodone;
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}
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}
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else {
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len = in->wp - in->rp;
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jbig2_data_in(d->ctx, in->rp, len);
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in->rp += len;
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}
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}
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}
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