jboolean Java_com_googlecode_leptonica_android_ReadFile_nativeReplaceBytes8(JNIEnv *env,
jclass clazz,
jlong nativePix,
jbyteArray data,
jint srcw, jint srch) {
PIX *pix = (PIX *) nativePix;
l_int32 w, h, d;
pixGetDimensions(pix, &w, &h, &d);
if (d != 8 || (l_int32) srcw != w || (l_int32) srch != h) {
LOGE("Failed to replace bytes at w=%d, h=%d, d=%d with w=%d, h=%d", w, h, d, srcw, srch);
return JNI_FALSE;
}
l_uint8 **lineptrs = pixSetupByteProcessing(pix, NULL, NULL);
jbyte *data_buffer = env->GetByteArrayElements(data, NULL);
l_uint8 *byte_buffer = (l_uint8 *) data_buffer;
for (int i = 0; i < h; i++) {
memcpy(lineptrs[i], (byte_buffer + (i * w)), w);
}
env->ReleaseByteArrayElements(data, data_buffer, JNI_ABORT);
pixCleanupByteProcessing(pix, lineptrs);
return JNI_TRUE;
}
jint Java_com_googlecode_leptonica_android_ReadFile_nativeReadBytes8(JNIEnv *env, jclass clazz,
jbyteArray data, jint w,
jint h) {
LOGV(__FUNCTION__);
PIX *pix = pixCreateNoInit((l_int32) w, (l_int32) h, 8);
l_uint8 **lineptrs = pixSetupByteProcessing(pix, NULL, NULL);
jbyte *data_buffer = env->GetByteArrayElements(data, NULL);
l_uint8 *byte_buffer = (l_uint8 *) data_buffer;
for (int i = 0; i < h; i++) {
memcpy(lineptrs[i], (byte_buffer + (i * w)), w);
}
env->ReleaseByteArrayElements(data, data_buffer, JNI_ABORT);
pixCleanupByteProcessing(pix, lineptrs);
l_int32 d;
pixGetDimensions(pix, &w, &h, &d);
LOGE("Created image width w=%d, h=%d, d=%d", w, h, d);
return (jint) pix;
}
jint Java_com_googlecode_leptonica_android_WriteFile_nativeWriteBytes8(JNIEnv *env, jclass clazz,
jlong nativePix,
jbyteArray data) {
l_int32 w, h, d;
PIX *pix = (PIX *) nativePix;
pixGetDimensions(pix, &w, &h, &d);
l_uint8 **lineptrs = pixSetupByteProcessing(pix, NULL, NULL);
jbyte *data_buffer = env->GetByteArrayElements(data, NULL);
l_uint8 *byte_buffer = (l_uint8 *) data_buffer;
for (int i = 0; i < h; i++) {
memcpy((byte_buffer + (i * w)), lineptrs[i], w);
}
env->ReleaseByteArrayElements(data, data_buffer, 0);
pixCleanupByteProcessing(pix, lineptrs);
return (jint)(w * h);
}
