Question

我正在尝试链接两个Renderscripts：ScriptIntrinsicBlur和ScriptIntrinsicColorMatrix。
我想模糊和图像，然后应用彩色滤镜。

这是我当前的代码（我尝试了许多不同的实现，包括ScriptGroups，我无法开始工作：

final ScriptIntrinsicBlur scriptBlur = ScriptIntrinsicBlur.create(
        mRenderScript,
        Element.U8_4(mRenderScript));
final Allocation input = Allocation.createFromBitmap(mRenderScript,
        bmp);
Bitmap blurOutBitmap = bmp.copy(bmp.getConfig(), true);
final Allocation output = Allocation.createFromBitmap(
        mRenderScript, blurOutBitmap);

scriptBlur.setRadius(mBlur_Radius);
scriptBlur.setInput(input);
scriptBlur.forEach(output);
bmp.recycle();
output.copyTo(blurOutBitmap);

mRenderScript.finish();

final ScriptIntrinsicColorMatrix scriptColor = ScriptIntrinsicColorMatrix
        .create(mRenderScript, Element.U8_4(mRenderScript));

/** for a first test, I am using a simple blue filter **/
Matrix3f mat = new Matrix3f(new float[] {
        1, 0, 1,
        0, 1, 1,
        0, 0, 1
});
scriptColor.setColorMatrix(mat);

final Allocation colorInput = Allocation.createFromBitmap(mRenderScript,
        blurOutBitmap);
Bitmap outBitmap = bmp.copy(blurOutBitmap.getConfig(), true);
final Allocation colorOutput = Allocation.createFromBitmap(
        mRenderScript, outBitmap);

scriptColor.forEach(colorInput, colorOutput);
blurOutBitmap.recycle();
colorOutput.copyTo(outBitmap);
displayBitmap(outBitmap);

此代码会在图像上产生非常难看的瑕疵（并行红线），如果我尝试使用ScriptGroup，它只会崩溃。
有Renderscript Experience的人能帮我解释原因吗？由于关于该主题的样本或文档非常少，我不得不尝试随机修改。

Answer 1

这是正确的方法（或者至少有一种方法可行，这种情况有点儿麻烦）：

Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.lenna);

        ScriptIntrinsicBlur scriptBlur = ScriptIntrinsicBlur.create(mRenderScript, Element.U8_4(mRenderScript));
        scriptBlur.setRadius(5f);

        ScriptIntrinsicColorMatrix scriptColor = ScriptIntrinsicColorMatrix.create(mRenderScript, Element.U8_4(mRenderScript));

        final Allocation input = Allocation.createFromBitmap(mRenderScript, bitmap,
                Allocation.MipmapControl.MIPMAP_NONE,
                Allocation.USAGE_SCRIPT | Allocation.USAGE_SHARED);
        scriptBlur.setInput(input);
        Bitmap outBitmap = bitmap.copy(bitmap.getConfig(), true);
        final Allocation output = Allocation.createTyped(mRenderScript, input.getType());


        scriptColor.setColorMatrix(new Matrix4f(
                new float[]{1, 0f, 0f,   0,
                            1, 1,  0f,   0,
                            1, 0f, 1,    0,
                            0, 0,  0,    1}
        ));


        ScriptGroup.Builder b = new ScriptGroup.Builder(mRenderScript);
        b.addKernel(scriptBlur.getKernelID());
        b.addKernel(scriptColor.getKernelID());
        b.addConnection(input.getType(), scriptBlur.getKernelID(), scriptColor.getKernelID());
        ScriptGroup group = b.create();

       // group.setInput(scriptBlur.getKernelID(),input);
        group.setOutput(scriptColor.getKernelID(), output);


        group.execute();
        output.copyTo(outBitmap);
        return outBitmap;

Chain 2 Renderscript Intrinsics：Blur＆amp;嘉洛斯

1 个答案: