renderscript

问题 Seems to me that android has an android.support.v8 package that contains Renderscript support. The thing is, this doesn't seem documented anywhere - the support library docs don't say anything about a v8 package, just v4 and v13. Is that package supported on all devices with API level 8 and above and can it be safely used in production? 回答1: PSA for Googlers: RenderScript is now part of the Android Support Library. You can use it on Android 2.2+. 回答2: Its not yet production quality. 回答3: My

问题 Android Studio --> Open Module Settings --> Build Types --> Renderscript Optim Level --> (3) // by default What is "Rendercript Optim Level" best value? 回答1: It's best to use the default "optim" level 3. In the renderscript source, level 3 corresponds to the value llvm::CodeGenOpt::Aggressive in the slang compiler. It's the argument that sets the level of optimization slang uses to compile the .rs file into the intermediate bitcode ( .bc ) file that get shipped with your app. Interestingly,

问题 I've write very short RS, but after gradle sync Android Studio gives me error Error:(8, 34) error: no matching function for call to 'rsGetElementAt_uchar4' Script: #pragma version(1) #pragma rs java_package_name(xx.xxx.xxxxxxx) uchar4 road = 0; const uchar4 nothing = 0; void init() { road.a = 0xff; } uchar4 __attribute__((kernel)) kernel(uchar4 original, uint32_t x, uint32_t y) { uchar4 masked = rsGetElementAt_uchar4(extra_alloc, x, y)); if (original.r != masked.r || original.g != masked.g ||

问题 I am newbie to RenderScript and trying to process image with size 1920x1280px, this seems to be crashing every time with following error on logcat 09-04 19:26:04.670: D/dalvikvm(30308): GC_FOR_ALLOC freed 73K, 3% free 6615K/6787K, paused 26ms 09-04 19:26:04.680: I/dalvikvm-heap(30308): Grow heap (frag case) to 14.404MB for 8294416-byte allocation 09-04 19:26:04.690: D/dalvikvm(30308): GC_CONCURRENT freed 2K, 2% free 14713K/14919K, paused 1ms+1ms 09-04 19:26:04.820: D/dalvikvm(30308): GC_FOR

问题 I have an byte[] array of a greyvalue image dataIn with dimension width * height. Now, I want to crop the image by applying a translation (dx, dy) and cut-off the out-of-border regions, so that the dataOut has dimension (width-abs(dx))*(height-abs(dy)). In RenderScript I would use a 2-d uchar-Allocation both for the input and the output. In order to efficiently apply the crop operation, it was thinking of using the LaunchOptions with (for example) setX(dx,width) and setY(0, height-dy) and

问题 I'm passing an allocation created from Bitmap into rs file, and inside the script I'm trying to copy the allocation to a new one using the rsAllocationCopy2DRange function, but I get force close when I'm trying to run the app. Can someone please explain how to use the function correctly, and what exactly are the arguments it gets. I looked in the reference site: http://developer.android.com/reference/renderscript/rs__allocation_8rsh.html#a7f7e2369b3ed7d7db31729b6db7ba07e but I still don't

问题 I have the following renderscript: #pragma version(1) #pragma rs java_package_name(some.mypkg) #pragma rs_fp_relaxed rs_allocation inputImg; void root(const uint16_t *v_in, uint16_t *v_out, const void *usrData, uint32_t x, uint32_t y) { // Read in pixel values from latest frame - YUV color space uchar4 in_pixel= rsYuvToRGBA_uchar4(rsGetElementAtYuv_uchar_Y(inputImg, x, y), rsGetElementAtYuv_uchar_U(inputImg, x, y), rsGetElementAtYuv_uchar_V(inputImg, x, y)); //Do some more stuff *v_out =

问题 I've been working around with RenderScript for a few days, but I can't figure out how properly pass an array from Java to RenderScript. I saw some examples but none of them worked for me and I'm getting stuck with the lack of documentation. In this code I'm trying to do some checks between bb and coords array for each index in that root() receives: RenderScript code: #pragma version(1) #pragma rs java_package_name(com.me.example) int4 bb; rs_allocation coords; void __attribute__((kernel))

问题 I am trying to write a program for histogram calculation. So i have created a random array of 10 numbers treating it as the image array in 1D. The following is my renderscript and Java code. I want the histogram o be returned as an array with counts of each possible no generated but it only returns the first address of that number encountered. Any help would be much appreciated! Java code: public class Histcal extends Activity { private int[] image; private int[] luminance; private float[]

问题 I am writing android renderscript code which requires back to back kernel calls (sometimes output of one kernel become input of other). I also have some global pointers, binded to memory from Java layer. Each kernel updates those global pointers and outputs something. I hav e to make sure that execute of kernel1 is finished, before kernel2 starts execution. I looked at android renderscript docs, but couldn't understand syncAll(Usage) and finish() well. Can anyone clarify how to achieve this