2014/10/16 上午 08:09:53

android Programming Glossary: androidbitmap_unlockpixels

http://stackoverflow.com/questions/14398670/rotating-a-bitmap-using-jni-ndk

int stride info.stride int pixelsCount info.height info.width memcpy tempPixels src sizeof uint32_t pixelsCount AndroidBitmap_unlockPixels env bitmap recycle bitmap using bitmap.recycle LOGD recycling bitmap... jclass bitmapCls env GetObjectClass bitmap jmethodID.. 1 x 0 x for int y 0 y info.height y uint32_t pixel tempPixels info.width y x newBitmapPixels whereToPut pixel AndroidBitmap_unlockPixels env newBitmap freeing the native memory used to store the pixels delete tempPixels return newBitmap java file static System.loadLibrary..

How to cache bitmaps into native memory

http://stackoverflow.com/questions/17900732/how-to-cache-bitmaps-into-native-memory

jniBitmap _bitmapInfo.width memcpy newBitmapPixels jniBitmap _storedBitmapPixels sizeof uint32_t pixelsCount AndroidBitmap_unlockPixels env newBitmap LOGD returning the new bitmap return newBitmap JNIEXPORT jobject JNICALL Java_com_example_jnibitmapstoragetest_JniBitmapHolder_jniStoreBitmapData.. int pixelsCount bitmapInfo.height bitmapInfo.width memcpy storedBitmapPixels src sizeof uint32_t pixelsCount AndroidBitmap_unlockPixels env bitmap JniBitmap jniBitmap new JniBitmap jniBitmap _bitmapInfo bitmapInfo jniBitmap _storedBitmapPixels storedBitmapPixels..

JNI bitmap operations , for helping to avoid OOM when using large images [closed]

http://stackoverflow.com/questions/18250951/jni-bitmap-operations-for-helping-to-avoid-oom-when-using-large-images

jniBitmap _bitmapInfo.width memcpy newBitmapPixels jniBitmap _storedBitmapPixels sizeof uint32_t pixelsCount AndroidBitmap_unlockPixels env newBitmap LOGD returning the new bitmap return newBitmap store java bitmap as JNI data JNIEXPORT jobject JNICALL Java_com_jni_bitmap_1operations_JniBitmapHolder_jniStoreBitmapData.. int pixelsCount bitmapInfo.height bitmapInfo.width memcpy storedBitmapPixels src sizeof uint32_t pixelsCount AndroidBitmap_unlockPixels env bitmap JniBitmap jniBitmap new JniBitmap jniBitmap _bitmapInfo bitmapInfo jniBitmap _storedBitmapPixels storedBitmapPixels..