Converting from UIImage/CGImage to Leptonica Pix structure

UIImage *image = [UIImage imageNamed:@"test.png"];

...

CFDataRef imageData = CGDataProviderCopyData(CGImageGetDataProvider([image CGImage]));

const UInt8 *rasterData = CFDataGetBytePtr(data);

/*-------------------------------------------------------------------------*

* Basic Pix *

*-------------------------------------------------------------------------*/

struct Pix

{

l_uint32 w; /* width in pixels */

l_uint32 h; /* height in pixels */

l_uint32 d; /* depth in bits */

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_* */

char *text; /* text string associated with pix */

struct PixColormap *colormap; /* colormap (may be null) */

l_uint32 *data; /* the image data */

};

UIImage *image = [UIImage imageNamed:@"test.png"];

CFDataRef data = CGDataProviderCopyData(CGImageGetDataProvider([image CGImage]));

const UInt8 *imageData = CFDataGetBytePtr(data);

Pix *myPix = (Pix *) malloc(sizeof(Pix));

CGImageRef myCGImage = [image CGImage];

myPix->w = CGImageGetWidth (myCGImage);

myPix->h = CGImageGetHeight (myCGImage);

myPix->d = CGImageGetBitsPerComponent(myCGImage);

myPix->wpl = CGImageGetBytesPerRow (myCGImage) / 4;

myPix->data = (l_uint32 *) imageData;

myPix->colormap = NULL;

NSLog(@"pixWrite=%d", pixWrite("/tmp/lept-res.bmp", myPix, IFF_BMP));

CGImageRef myCGImage = [image CGImage];

struct Pix myPix;

myPix.w = CGImageGetWidth (myCGImage);

myPix.h = CGImageGetHeight (myCGImage);

myPix.d = CGImageGetBitsPerComponent (myCGImage);

myPix.wpl = CGImageGetBytesPerRow (myCGImage) / 4;

... etc. ...

CFDataRef data = CGDataProviderCopyData(CGImageGetDataProvider([picture CGImage]));

const UInt8 *imageData = CFDataGetBytePtr(data);

Pix *myPix = (Pix *) malloc(sizeof(Pix));

CGImageRef myCGImage = [picture CGImage];

myPix->w = CGImageGetWidth (myCGImage);

myPix->h = CGImageGetHeight (myCGImage);

myPix->d = CGImageGetBitsPerPixel([picture CGImage]) ;

myPix->wpl = CGImageGetBytesPerRow (myCGImage)/4 ;

myPix->data = (l_uint32 *) imageData;

myPix->colormap = NULL;

pixEndianByteSwap(myPix);

NSLog(@"pixWrite=%d", pixWrite("/tmp/lept-res.bmp", myPix, IFF_BMP));