private void performFilter()

in RenderScriptIntrinsic/Application/src/main/java/com/example/android/renderscriptintrinsic/MainActivity.java [170:224]
40 lines of code
4 McCabe index (conditional complexity)

    private void performFilter(Allocation inAllocation,
                               Allocation outAllocation, Bitmap bitmapOut, float value) {
        switch (mFilterMode) {
            case MODE_BLUR:
                // Set blur kernel size
                mScriptBlur.setRadius(value);

                // Invoke filter kernel
                mScriptBlur.setInput(inAllocation);
                mScriptBlur.forEach(outAllocation);
                break;
            case MODE_CONVOLVE: {
                @SuppressWarnings("UnnecessaryLocalVariable")
                float f1 = value;
                float f2 = 1.0f - f1;

                // Emboss filter kernel
                float coefficients[] = {-f1 * 2, 0, -f1, 0, 0, 0, -f2 * 2, -f2, 0,
                        0, -f1, -f2, 1, f2, f1, 0, 0, f2, f2 * 2, 0, 0, 0, f1, 0,
                        f1 * 2,};
                // Set kernel parameter
                mScriptConvolve.setCoefficients(coefficients);

                // Invoke filter kernel
                mScriptConvolve.setInput(inAllocation);
                mScriptConvolve.forEach(outAllocation);
                break;
            }
            case MODE_COLORMATRIX: {
                // Set HUE rotation matrix
                // The matrix below performs a combined operation of,
                // RGB->HSV transform * HUE rotation * HSV->RGB transform
                float cos = (float) Math.cos((double) value);
                float sin = (float) Math.sin((double) value);
                Matrix3f mat = new Matrix3f();
                mat.set(0, 0, (float) (.299 + .701 * cos + .168 * sin));
                mat.set(1, 0, (float) (.587 - .587 * cos + .330 * sin));
                mat.set(2, 0, (float) (.114 - .114 * cos - .497 * sin));
                mat.set(0, 1, (float) (.299 - .299 * cos - .328 * sin));
                mat.set(1, 1, (float) (.587 + .413 * cos + .035 * sin));
                mat.set(2, 1, (float) (.114 - .114 * cos + .292 * sin));
                mat.set(0, 2, (float) (.299 - .3 * cos + 1.25 * sin));
                mat.set(1, 2, (float) (.587 - .588 * cos - 1.05 * sin));
                mat.set(2, 2, (float) (.114 + .886 * cos - .203 * sin));
                mScriptMatrix.setColorMatrix(mat);

                // Invoke filter kernel
                mScriptMatrix.forEach(inAllocation, outAllocation);
            }
            break;
        }

        // Copy to bitmap and invalidate image view
        outAllocation.copyTo(bitmapOut);
    }