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Experiment with CFFI instead of ctypes

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James R. Barlow 2016-01-30 15:06:25 -08:00
parent 350ad5210e
commit 411981efbc
1 changed files with 58 additions and 0 deletions
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ocrmypdf/lept.py Normal file
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from cffi import FFI
ffi = FFI()
ffi.set_source("_leptonica", None)
ffi.cdef("""
typedef signed char l_int8;
typedef unsigned char l_uint8;
typedef short l_int16;
typedef unsigned short l_uint16;
typedef int l_int32;
typedef unsigned int l_uint32;
typedef float l_float32;
typedef double l_float64;
typedef long long l_int64;
typedef unsigned long long l_uint64;
struct Pix
{
l_uint32 w; /* width in pixels */
l_uint32 h; /* height in pixels */
l_uint32 d; /* depth in bits (bpp) */
l_uint32 spp; /* number of samples per pixel */
l_uint32 wpl; /* 32-bit words/line */
l_uint32 refcount; /* reference count (1 if no clones) */
l_int32 xres; /* image res (ppi) in x direction */
/* (use 0 if unknown) */
l_int32 yres; /* image res (ppi) in y direction */
/* (use 0 if unknown) */
l_int32 informat; /* input file format, IFF_* */
l_int32 special; /* special instructions for I/O, etc */
char *text; /* text string associated with pix */
struct PixColormap *colormap; /* colormap (may be null) */
l_uint32 *data; /* the image data */
};
typedef struct Pix PIX;
struct PixColormap
{
void *array; /* colormap table (array of RGBA_QUAD) */
l_int32 depth; /* of pix (1, 2, 4 or 8 bpp) */
l_int32 nalloc; /* number of color entries allocated */
l_int32 n; /* number of color entries used */
};
typedef struct PixColormap PIXCMAP;
""")
ffi.cdef("""
PIX * pixRead ( const char *filename );
PIX * pixScale ( PIX *pixs, l_float32 scalex, l_float32 scaley );
l_int32 pixFindSkew ( PIX *pixs, l_float32 *pangle, l_float32 *pconf );
l_int32 pixWriteImpliedFormat ( const char *filename, PIX *pix, l_int32 quality, l_int32 progressive );
void pixDestroy ( PIX **ppix );
PIX * pixDeskew ( PIX *pixs, l_int32 redsearch );
char * getLeptonicaVersion ( );
""")
if __name__ == '__main__':
ffi.compile()