77 lines
1.9 KiB
C++
77 lines
1.9 KiB
C++
#include <jni.h>
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#include "opencv2/core/core.hpp"
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#include <android/bitmap.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Class: org_opencv_android
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* Method: nBitmapToMat(Bitmap b)
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* Signature: (L)J
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*/
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JNIEXPORT jlong JNICALL Java_org_opencv_android_nBitmapToMat
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(JNIEnv * env, jclass cls, jobject bitmap)
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{
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AndroidBitmapInfo info;
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void* pixels;
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cv::Mat* m = new cv::Mat();
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if ( AndroidBitmap_getInfo(env, bitmap, &info) < 0 )
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return (jlong)m; // can't get info
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if (info.format != ANDROID_BITMAP_FORMAT_RGBA_8888)
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return (jlong)m; // incompatible format
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if ( AndroidBitmap_lockPixels(env, bitmap, &pixels) < 0 )
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return (jlong)m; // can't get pixels
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m->create(info.height, info.width, CV_8UC4);
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if(m->data && pixels)
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memcpy(m->data, pixels, info.height * info.width * 4);
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AndroidBitmap_unlockPixels(env, bitmap);
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return (jlong)m;
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}
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/*
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* Class: org_opencv_android
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* Method: nBitmapToMat(long m, Bitmap b)
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* Signature: (JL)Z
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*/
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JNIEXPORT jboolean JNICALL Java_org_opencv_android_nMatToBitmap
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(JNIEnv * env, jclass cls, jlong m, jobject bitmap)
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{
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AndroidBitmapInfo info;
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void* pixels;
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cv::Mat* mat = (cv::Mat*) m;
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if ( mat == 0 || mat->data == 0)
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return false; // no native Mat behind
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if ( AndroidBitmap_getInfo(env, bitmap, &info) < 0 )
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return false; // can't get info
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if (info.format != ANDROID_BITMAP_FORMAT_RGBA_8888)
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return false; // incompatible format
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if ( AndroidBitmap_lockPixels(env, bitmap, &pixels) < 0 )
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return false; // can't get pixels
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if(mat->data && pixels)
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memcpy(pixels, mat->data, info.height * info.width * 4);
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AndroidBitmap_unlockPixels(env, bitmap);
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return true;
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}
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#ifdef __cplusplus
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}
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#endif
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