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#include <stdio.h>
#include <hocr.h>
#include <hocr_pixbuf.h>
#include <assert.h>
#include "hocr_java.h"
/**************************************************************
public static native String doOcr_Params(
byte[] pixels,
int height,
int width,
int rowstride, //0=calculate using n_channels,width
int n_channels, // 1,3
int brightness, //0=default
int command //0=default
);
**************************************************************/
/*
* Class: Hocr_Plugin
* Method: doOcr_Params
* Signature: ([BIIIIII)Ljava/lang/String;
*/
JNIEXPORT jstring JNICALL Java_Hocr_1Plugin_doOcr_1Params
(JNIEnv *env,
jclass cl,
jbyteArray pixels,
jint height,
jint width,
jint rowstride, //0=calculate using n_channels,width
jint n_channels, // 1,3,
jint brightness,
jint command //0=default
)
{
jstring jstr = NULL;
hocr_text_buffer *textbuf;
hocr_pixbuf *pixbuf = hocr_pixbuf_new();
assert(pixbuf);
pixbuf->n_channels=n_channels; /** number of color channels in the pixpuf (e.g. 3 for red,green,blue). */
pixbuf->brightness = brightness; /** value from which a gray-scale pixel is considered white. */
pixbuf->height = height; /** get height in pixels. */
pixbuf->width = width; /** get width in pixels. */
/** get number of bytes in a raw of pixels. */
if (rowstride)
pixbuf->rowstride = rowstride;
else
{
assert(pixbuf->n_channels==3 || pixbuf->n_channels==1);
pixbuf->rowstride = pixbuf->n_channels * pixbuf->width;
}
// raw pixpuf data.
pixbuf->pixels = (unsigned char*)((*env)->GetByteArrayElements(env, pixels, NULL));
if (!command)
{
// build ocr command
pixbuf->command = HOCR_COMMAND_OCR;
pixbuf->command |= HOCR_COMMAND_NIKUD; // use nikud
pixbuf->command |= HOCR_COMMAND_USE_SPACE_FOR_TAB; // use spaces
pixbuf->command |= HOCR_COMMAND_USE_INDENTATION; // use indentation
pixbuf->command |= HOCR_COMMAND_COLOR_BOXES;
pixbuf->command |= HOCR_COMMAND_COLOR_MISREAD;
}
else
pixbuf->command = command;
textbuf = hocr_text_buffer_new (); // create text buffer
assert(textbuf);
hocr_do_ocr (pixbuf, textbuf); // run the ocr
(*env)->ReleaseByteArrayElements(env, pixels, (signed char*)(pixbuf->pixels), 0);
pixbuf->pixels = NULL; // hocr_pixbuf_unref() shouldn't free pixel mem
hocr_pixbuf_unref (pixbuf); // unref memory
pixbuf = NULL;
// create java String object from OCR'ed text
jstr = (*env)->NewStringUTF(env, textbuf->text);
hocr_text_buffer_unref (textbuf); // unref textbuf
return jstr;
}
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