kopia lustrzana https://gitlab.com/sane-project/backends
82 wiersze
2.1 KiB
C
82 wiersze
2.1 KiB
C
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#include "escl.h"
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#include "../include/sane/sanei.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#if(defined HAVE_TIFFIO_H)
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#include <tiffio.h>
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#endif
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#include <setjmp.h>
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#if(defined HAVE_TIFFIO_H)
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/**
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* \fn SANE_Status escl_sane_decompressor(escl_sane_t *handler)
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* \brief Function that aims to decompress the png image to SANE be able to read the image.
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* This function is called in the "sane_read" function.
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*
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* \return SANE_STATUS_GOOD (if everything is OK, otherwise, SANE_STATUS_NO_MEM/SANE_STATUS_INVAL)
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*/
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SANE_Status
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get_TIFF_data(capabilities_t *scanner, int *w, int *h, int *components)
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{
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TIFF* tif = NULL;
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uint32 width = 0; /* largeur */
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uint32 height = 0; /* hauteur */
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unsigned char *raster = NULL; /* données de l'image */
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int bps = 4;
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uint32 npixels = 0;
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lseek(fileno(scanner->tmp), 0, SEEK_SET);
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tif = TIFFFdOpen(fileno(scanner->tmp), "temp", "r");
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if (!tif) {
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fprintf(stderr, "Can not open, or not a TIFF file.\n");
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return (SANE_STATUS_INVAL);
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}
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TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &width);
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TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &height);
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npixels = width * height;
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raster = (unsigned char*) malloc(npixels * sizeof (uint32));
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if (raster != NULL)
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{
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fprintf(stderr, "Memory allocation problem.\n");
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return (SANE_STATUS_INVAL);
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}
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if (!TIFFReadRGBAImage(tif, width, height, (uint32 *)raster, 0))
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{
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fprintf(stderr, "Problem reading image data.\n");
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return (SANE_STATUS_INVAL);
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}
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*w = (int)width;
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*h = (int)height;
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*components = bps;
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// we don't need row pointers anymore
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scanner->img_data = raster;
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scanner->img_size = (int)(width * height * bps);
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scanner->img_read = 0;
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TIFFClose(tif);
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fclose(scanner->tmp);
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scanner->tmp = NULL;
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return (SANE_STATUS_GOOD);
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}
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#else
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SANE_Status
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get_TIFF_data(capabilities_t __sane_unused__ *scanner,
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int __sane_unused__ *w,
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int __sane_unused__ *h,
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int __sane_unused__ *bps)
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{
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return (SANE_STATUS_INVAL);
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}
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#endif
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