224 lines
7.2 KiB
Python
224 lines
7.2 KiB
Python
# © 2017 James R. Barlow: github.com/jbarlow83
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from cffi import FFI
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ffibuilder = FFI()
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ffibuilder.set_source("ocrmypdf.lib._leptonica", None)
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ffibuilder.cdef("""
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typedef signed char l_int8;
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typedef unsigned char l_uint8;
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typedef short l_int16;
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typedef unsigned short l_uint16;
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typedef int l_int32;
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typedef unsigned int l_uint32;
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typedef float l_float32;
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typedef double l_float64;
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typedef long long l_int64;
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typedef unsigned long long l_uint64;
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struct Pix
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{
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l_uint32 w; /* width in pixels */
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l_uint32 h; /* height in pixels */
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l_uint32 d; /* depth in bits (bpp) */
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l_uint32 spp; /* number of samples per pixel */
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l_uint32 wpl; /* 32-bit words/line */
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l_uint32 refcount; /* reference count (1 if no clones) */
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l_int32 xres; /* image res (ppi) in x direction */
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/* (use 0 if unknown) */
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l_int32 yres; /* image res (ppi) in y direction */
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/* (use 0 if unknown) */
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l_int32 informat; /* input file format, IFF_* */
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l_int32 special; /* special instructions for I/O, etc */
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char *text; /* text string associated with pix */
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struct PixColormap *colormap; /* colormap (may be null) */
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l_uint32 *data; /* the image data */
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};
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typedef struct Pix PIX;
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struct PixColormap
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{
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void *array; /* colormap table (array of RGBA_QUAD) */
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l_int32 depth; /* of pix (1, 2, 4 or 8 bpp) */
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l_int32 nalloc; /* number of color entries allocated */
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l_int32 n; /* number of color entries used */
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};
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typedef struct PixColormap PIXCMAP;
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struct Box
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{
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l_int32 x;
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l_int32 y;
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l_int32 w;
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l_int32 h;
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l_uint32 refcount; /* reference count (1 if no clones) */
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};
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typedef struct Box BOX;
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""")
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ffibuilder.cdef("""
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PIX * pixRead ( const char *filename );
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PIX * pixScale ( PIX *pixs, l_float32 scalex, l_float32 scaley );
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l_int32 pixFindSkew ( PIX *pixs, l_float32 *pangle, l_float32 *pconf );
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l_int32 pixWriteImpliedFormat ( const char *filename, PIX *pix, l_int32 quality, l_int32 progressive );
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l_int32
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pixWriteMemPng(l_uint8 **pdata,
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size_t *psize,
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PIX *pix,
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l_float32 gamma);
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void pixDestroy ( PIX **ppix );
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PIX *
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pixEndianByteSwapNew(PIX *pixs);
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PIX * pixDeskew ( PIX *pixs, l_int32 redsearch );
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char * getLeptonicaVersion ( );
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l_int32 pixCorrelationBinary(PIX *pix1, PIX *pix2, l_float32 *pval);
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PIX *pixRotate180(PIX *pixd, PIX *pixs);
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PIX *
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pixRotateOrth(PIX *pixs,
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l_int32 quads);
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l_int32 pixCountPixels ( PIX *pix, l_int32 *pcount, l_int32 *tab8 );
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PIX * pixAnd ( PIX *pixd, PIX *pixs1, PIX *pixs2 );
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l_int32 * makePixelSumTab8 ( void );
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PIX * pixDeserializeFromMemory ( const l_uint32 *data, size_t nbytes );
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l_int32 pixSerializeToMemory ( PIX *pixs, l_uint32 **pdata, size_t *pnbytes );
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PIX * pixConvertRGBToLuminance(PIX *pixs);
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PIX * pixRemoveColormap(PIX *pixs, l_int32 type);
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l_int32
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pixOtsuAdaptiveThreshold(PIX *pixs,
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l_int32 sx,
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l_int32 sy,
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l_int32 smoothx,
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l_int32 smoothy,
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l_float32 scorefract,
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PIX **ppixth,
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PIX **ppixd);
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PIX *
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pixOtsuThreshOnBackgroundNorm(PIX *pixs,
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PIX *pixim,
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l_int32 sx,
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l_int32 sy,
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l_int32 thresh,
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l_int32 mincount,
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l_int32 bgval,
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l_int32 smoothx,
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l_int32 smoothy,
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l_float32 scorefract,
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l_int32 *pthresh);
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PIX *
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pixCleanBackgroundToWhite(PIX *pixs,
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PIX *pixim,
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PIX *pixg,
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l_float32 gamma,
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l_int32 blackval,
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l_int32 whiteval);
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BOX *
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pixFindPageForeground(PIX *pixs,
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l_int32 threshold,
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l_int32 mindist,
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l_int32 erasedist,
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l_int32 pagenum,
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l_int32 showmorph,
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l_int32 display,
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const char *pdfdir);
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PIX *
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pixClipRectangle(PIX *pixs,
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BOX *box,
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BOX **pboxc);
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PIX *
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pixBackgroundNorm(PIX *pixs,
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PIX *pixim,
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PIX *pixg,
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l_int32 sx,
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l_int32 sy,
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l_int32 thresh,
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l_int32 mincount,
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l_int32 bgval,
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l_int32 smoothx,
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l_int32 smoothy);
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PIX *
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pixGammaTRC(PIX *pixd,
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PIX *pixs,
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l_float32 gamma,
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l_int32 minval,
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l_int32 maxval);
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l_int32
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pixNumSignificantGrayColors(PIX *pixs,
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l_int32 darkthresh,
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l_int32 lightthresh,
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l_float32 minfract,
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l_int32 factor,
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l_int32 *pncolors);
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l_int32
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pixColorFraction(PIX *pixs,
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l_int32 darkthresh,
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l_int32 lightthresh,
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l_int32 diffthresh,
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l_int32 factor,
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l_float32 *ppixfract,
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l_float32 *pcolorfract);
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PIX *
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pixColorMagnitude(PIX *pixs,
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l_int32 rwhite,
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l_int32 gwhite,
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l_int32 bwhite,
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l_int32 type);
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PIX *
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pixMaskOverColorPixels(PIX *pixs,
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l_int32 threshdiff,
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l_int32 mindist);
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l_int32
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pixGetAverageMaskedRGB(PIX *pixs,
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PIX *pixm,
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l_int32 x,
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l_int32 y,
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l_int32 factor,
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l_int32 type,
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l_float32 *prval,
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l_float32 *pgval,
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l_float32 *pbval);
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PIX *
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pixGlobalNormRGB(PIX * pixd,
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PIX * pixs,
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l_int32 rval,
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l_int32 gval,
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l_int32 bval,
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l_int32 mapval);
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PIX *
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pixInvert(PIX * pixd,
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PIX * pixs);
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void
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boxDestroy(BOX **pbox);
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void
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lept_free(void *ptr);
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""")
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if __name__ == '__main__':
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ffibuilder.compile(verbose=True)
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