I'm clearly missing something here but have been going round in circles all day
so can someone please can you point out where my blind spot is...
I have a very simple RenderScript (.rs) file which tries to copy data from one
float pointer to another (please note that this is a contrived case for test
purposes):
void root(const float *v_in, float *v_out) {
const float *data = v_in;
float *outData = v_out;
for(int i=0;i<size;i++) {
*outData = *data; // [X] DOES NOT WORK!
data ++;
outData ++;
}
}
In the Java code I create the script and allocations then call the script as:
RenderScript rs = RenderScript.create(ctx);
ScriptC_protomask protomaskScript = new ScriptC_protomask(rs, getResources(),
R.raw.protomask);
Allocation inFloatPointer = Allocation.createSized(rs, Element.F32(rs),
data.length, Allocation.USAGE_IO_INPUT);
Allocation outFloatPointer = Allocation.createSized(rs, Element.F32(rs),
data.length, Allocation.USAGE_IO_OUTPUT);
inFloatPointer.copyFrom(data); // copies from an array of floats (random
numbers in this test case).
protomaskScript.set_size(data.length);
protomaskScript.forEach_root(inFloatPointer, outFloatPointer);
Now my expectation is that this will just copy the data from one allocation to
another (pointless, but again, this is just a test case). When I comment out
the line in the .rs file ([x] above) the script runs but clearly does nothing.
When I leave it in, the code crashes with sig 11 suggesting I'm attempting to
write to some memory I'm not allowed to. But why not? I've created and sized
both allocations - why can I not just write to the output float pointer? :(
Off to get some fresh air and kick a football round the garden.. Thanks.
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