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2014/10/16 ¤W¤È 08:10:36
android Programming Glossary: bitmapinfo.heightHow to cache bitmaps into native memory http://stackoverflow.com/questions/17900732/how-to-cache-bitmaps-into-native-memory bitmapCls createBitmapFunction jniBitmap _bitmapInfo.height jniBitmap _bitmapInfo.width bitmapConfig putting the pixels.. uint32_t bitmapPixels int pixelsCount jniBitmap _bitmapInfo.height jniBitmap _bitmapInfo.width memcpy newBitmapPixels jniBitmap.. NULL LOGD width d height d stride d bitmapInfo.width bitmapInfo.height bitmapInfo.stride if bitmapInfo.format ANDROID_BITMAP_FORMAT_RGBA_8888..
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 newWidth jniBitmap _bitmapInfo.height newHeight rotates the inner bitmap data by 90 degress counter.. _bitmapInfo uint32_t newBitmapPixels new uint32_t bitmapInfo.height bitmapInfo.width int whereToPut 0 A.D D.C ... ... B.C A.B for.. B.C A.B for int x bitmapInfo.width 1 x 0 x for int y 0 y bitmapInfo.height y uint32_t pixel previousData bitmapInfo.width y x newBitmapPixels..
How to cache bitmaps into native memory http://stackoverflow.com/questions/17900732/how-to-cache-bitmaps-into-native-memory configName jobject newBitmap env CallStaticObjectMethod bitmapCls createBitmapFunction jniBitmap _bitmapInfo.height jniBitmap _bitmapInfo.width bitmapConfig putting the pixels into the new bitmap int ret void bitmapPixels if ret AndroidBitmap_lockPixels.. failed error d ret return NULL uint32_t newBitmapPixels uint32_t bitmapPixels int pixelsCount jniBitmap _bitmapInfo.height jniBitmap _bitmapInfo.width memcpy newBitmapPixels jniBitmap _storedBitmapPixels sizeof uint32_t pixelsCount AndroidBitmap_unlockPixels.. bitmapInfo 0 LOGE AndroidBitmap_getInfo failed error d ret return NULL LOGD width d height d stride d bitmapInfo.width bitmapInfo.height bitmapInfo.stride if bitmapInfo.format ANDROID_BITMAP_FORMAT_RGBA_8888 LOGE Bitmap format is not RGBA_8888 return NULL ..
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 one delete previousData jniBitmap _storedBitmapPixels newBitmapPixels jniBitmap _bitmapInfo.width newWidth jniBitmap _bitmapInfo.height newHeight rotates the inner bitmap data by 90 degress counter clock wise JNIEXPORT void JNICALL Java_com_jni_bitmap_1operations_JniBitmapHolder_jniRotateBitmapCcw90.. jniBitmap _storedBitmapPixels AndroidBitmapInfo bitmapInfo jniBitmap _bitmapInfo uint32_t newBitmapPixels new uint32_t bitmapInfo.height bitmapInfo.width int whereToPut 0 A.D D.C ... ... B.C A.B for int x bitmapInfo.width 1 x 0 x for int y 0 y bitmapInfo.height.. bitmapInfo.width int whereToPut 0 A.D D.C ... ... B.C A.B for int x bitmapInfo.width 1 x 0 x for int y 0 y bitmapInfo.height y uint32_t pixel previousData bitmapInfo.width y x newBitmapPixels whereToPut pixel delete previousData jniBitmap _storedBitmapPixels..
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