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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
145 lines
2.7 KiB
C
145 lines
2.7 KiB
C
#include "fitz-base.h"
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#include "fitz-stream.h"
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/* TODO: bpc */
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/*
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* We use the Jasper JPEG2000 coder for now.
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*/
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#include <jasper/jasper.h>
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static char *colorspacename(jas_clrspc_t clrspc)
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{
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switch (jas_clrspc_fam(clrspc))
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{
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case JAS_CLRSPC_FAM_UNKNOWN: return "Unknown";
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case JAS_CLRSPC_FAM_XYZ: return "XYZ";
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case JAS_CLRSPC_FAM_LAB: return "Lab";
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case JAS_CLRSPC_FAM_GRAY: return "Gray";
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case JAS_CLRSPC_FAM_RGB: return "RGB";
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case JAS_CLRSPC_FAM_YCBCR: return "YCbCr";
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}
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return "Unknown";
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}
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typedef struct fz_jpxd_s fz_jpxd;
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struct fz_jpxd_s
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{
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fz_filter super;
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jas_stream_t *stream;
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jas_image_t *image;
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int offset;
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int stage;
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};
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fz_error *
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fz_newjpxd(fz_filter **fp, fz_obj *params)
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{
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int err;
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FZ_NEWFILTER(fz_jpxd, d, jpxd);
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err = jas_init();
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if (err) {
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fz_free(d);
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return fz_throw("ioerror in jpxd: jas_init()");
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}
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d->stream = jas_stream_memopen(nil, 0);
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if (!d->stream) {
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fz_free(d);
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return fz_throw("ioerror in jpxd: jas_stream_memopen()");
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}
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d->image = nil;
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d->offset = 0;
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d->stage = 0;
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return nil;
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}
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void
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fz_dropjpxd(fz_filter *filter)
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{
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fz_jpxd *d = (fz_jpxd*)filter;
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if (d->stream) jas_stream_close(d->stream);
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if (d->image) jas_image_destroy(d->image);
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}
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fz_error *
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fz_processjpxd(fz_filter *filter, fz_buffer *in, fz_buffer *out)
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{
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fz_jpxd *d = (fz_jpxd*)filter;
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int n, bpc, w, h;
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int i, x, y;
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switch (d->stage)
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{
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case 0: goto input;
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case 1: goto decode;
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case 2: goto output;
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}
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input:
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while (in->rp < in->wp) {
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n = jas_stream_write(d->stream, in->rp, in->wp - in->rp);
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in->rp += n;
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}
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if (!in->eof)
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return fz_ioneedin;
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d->stage = 1;
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decode:
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jas_stream_seek(d->stream, 0, 0);
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d->image = jas_image_decode(d->stream, -1, 0);
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if (!d->image)
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return fz_throw("ioerror in jpxd: unable to decode image data");
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fprintf(stderr, "P%c\n# JPX %d x %d n=%d bpc=%d colorspace=%04x %s\n%d %d\n%d\n",
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jas_image_numcmpts(d->image) == 1 ? '5' : '6',
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jas_image_width(d->image),
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jas_image_height(d->image),
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jas_image_numcmpts(d->image),
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jas_image_cmptprec(d->image, 0),
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jas_image_clrspc(d->image),
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colorspacename(jas_image_clrspc(d->image)),
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jas_image_width(d->image),
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jas_image_height(d->image),
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(1 << jas_image_cmptprec(d->image, 0)) - 1);
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d->stage = 2;
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output:
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w = jas_image_width(d->image);
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h = jas_image_height(d->image);
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n = jas_image_numcmpts(d->image);
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bpc = jas_image_cmptprec(d->image, 0); /* use precision of first component for all... */
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while (d->offset < w * h)
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{
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y = d->offset / w;
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x = d->offset - y * w;
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/* FIXME bpc != 8 */
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if (out->wp + n >= out->ep)
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return fz_ioneedout;
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for (i = 0; i < n; i++)
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*out->wp++ = jas_image_readcmptsample(d->image, i, x, y);
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d->offset ++;
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}
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out->eof = 1;
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return fz_iodone;
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}
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