I call this method two consecutive times because I needed a blur radius of
40px, but the SDK limitation was only 25px, so I thought I would just blur
it twice with 20px.
On Fri, May 23, 2014 at 1:18 PM, Harri Smatt <har...@gmail.com> wrote:
> Hi,
>
> How frequently do you call this method? I mean, you re-create both
> RenderScript and IntrinsicBlur objects on every call. And I am wondering
> how the underlying native implementation copes with this if the method is
> called twice or more within short a period.
>
> --
> H
> On May 20, 2014 10:08 PM, "littledot" <littledot5...@gmail.com> wrote:
>
>> I am implementing Gaussian blurring using the ScriptIntrinsicBlur class.
>> However, I have faced an intermittent issue where sometimes
>> ScriptIntrinsicBlur.create() throws RSRuntimeException: Internal error:
>> Object id 0.
>>
>> Here is the most stacktrace that I can post:
>>
>> android.renderscript.RSRuntimeException: Internal error: Object id 0.
>>
>>
>> at android.renderscript.BaseObj.getID(BaseObj.java:57)
>>
>>
>> at android.renderscript.Script.setVar(Script.java:202)
>>
>>
>> at
>> android.renderscript.ScriptIntrinsicBlur.setRadius(ScriptIntrinsicBlur.java:80)
>>
>>
>> at
>> android.renderscript.ScriptIntrinsicBlur.create(ScriptIntrinsicBlur.java:54)
>>
>>
>> The bitmap that is being blurred is usually around 300*300 ~ 400*400
>> pixels and the blurRadius is set to 20.
>>
>> private static Bitmap blurBitmap(Context context, Bitmap bm, float
>> blurRadius) {
>> if (context == null || bm == null || blurRadius < 0) {
>> return null;
>> }
>>
>> try {
>> /* Make image width a multiple of 4. This is to avoid a bug
>> in the
>> * implementation of ScriptIntrinsicBlur that causes visual
>> * artifacts Source:
>> * https://plus.google.com/+RomanNurik/posts/TLkVQC3M6jW */
>> if (bm.getWidth() % 4 != 0) {
>> bm = Bitmap.createBitmap(bm, 0, 0, bm.getWidth() -
>> (bm.getWidth() % 4), bm.getHeight());
>> }
>>
>> final RenderScript rs = RenderScript.create(context);
>> final Allocation input = Allocation.createFromBitmap(rs, bm,
>> Allocation.MipmapControl.MIPMAP_NONE,
>>
>> Allocation.USAGE_SCRIPT);
>> final Allocation output = Allocation.createTyped(rs,
>> input.getType());
>> final ScriptIntrinsicBlur script =
>> ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
>>
>> script.setRadius(blurRadius);
>> script.setInput(input);
>> script.forEach(output);
>> output.copyTo(bm);
>>
>> } catch (RSRuntimeException e) {
>> /* Throws android.renderscript.RSRuntimeException: Internal
>> error:
>> * Object id 0. */
>> }
>> return bm;
>> }
>>
>> The exception is being thrown when create() is being called. I traced the
>> ScriptIntrinsicBlur.create() method and it am guessing that my problem
>> starts here:
>>
>> int id = rs.nScriptIntrinsicCreate(5, e.getID(rs));
>> ScriptIntrinsicBlur sib = new ScriptIntrinsicBlur(id, rs);
>> sib.setRadius(5.f);
>>
>> I am guessing that the native method nScriptIntrinsicCreate() may be
>> returning 0, which is passed to the constructor, then when setRadius() is
>> called it does a check and throws the exception. My questions are:
>> 1. What does nScriptIntrinsicCreate() do and what can cause
>> nScriptIntrinsicCreate() to return 0?
>> 2. How do you go about debugging native methods?
>>
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--
Thank you for your time.
Yours truly,
Sheng-Dean Chang 章聖典
(s39ch...@uwaterloo.ca, littledot5...@gmail.com)
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