static void One()

in renderscript-toolkit/src/main/cpp/ColorMatrix.cpp [804:904]

• 90 lines of code
• 23 McCabe index (conditional complexity)

static void One(void *out,
                const void *py, const float* coeff, const float *add,
                uint32_t vsin, uint32_t vsout, bool fin, bool fout) {

    float4 f = 0.f;
    if (fin) {
        switch(vsin) {
        case 3:
            f = ((const float4 *)py)[0];
            break;
        case 2:
            f = ((const float4 *)py)[0];
            f.w = 0.f;
            break;
        case 1:
            f.xy = ((const float2 *)py)[0];
            break;
        case 0:
            f.x = ((const float *)py)[0];
            break;
        }
    } else {
        switch(vsin) {
        case 3:
            f = convert<float4>(((const uchar4 *)py)[0]);
            break;
        case 2:
            f = convert<float4>(((const uchar4 *)py)[0]);
            f.w = 0.f;
            break;
        case 1:
            f.xy = convert<float2>(((const uchar2 *)py)[0]);
            break;
        case 0:
            f.x = (float)(((const uchar *)py)[0]);
            break;
        }
    }
    //ALOGE("f1  %f %f %f %f", f.x, f.y, f.z, f.w);

    float4 sum;
    sum.x = f.x * coeff[0] +
            f.y * coeff[4] +
            f.z * coeff[8] +
            f.w * coeff[12];
    sum.y = f.x * coeff[1] +
            f.y * coeff[5] +
            f.z * coeff[9] +
            f.w * coeff[13];
    sum.z = f.x * coeff[2] +
            f.y * coeff[6] +
            f.z * coeff[10] +
            f.w * coeff[14];
    sum.w = f.x * coeff[3] +
            f.y * coeff[7] +
            f.z * coeff[11] +
            f.w * coeff[15];
    //ALOGE("f2  %f %f %f %f", sum.x, sum.y, sum.z, sum.w);

    sum.x += add[0];
    sum.y += add[1];
    sum.z += add[2];
    sum.w += add[3];


    //ALOGE("fout %i vs %i, sum %f %f %f %f", fout, vsout, sum.x, sum.y, sum.z, sum.w);
    if (fout) {
        switch(vsout) {
        case 3:
        case 2:
            ((float4 *)out)[0] = sum;
            break;
        case 1:
            ((float2 *)out)[0] = sum.xy;
            break;
        case 0:
            ((float *)out)[0] = sum.x;
            break;
        }
    } else {
        sum.x = sum.x < 0 ? 0 : (sum.x > 255.5 ? 255.5 : sum.x);
        sum.y = sum.y < 0 ? 0 : (sum.y > 255.5 ? 255.5 : sum.y);
        sum.z = sum.z < 0 ? 0 : (sum.z > 255.5 ? 255.5 : sum.z);
        sum.w = sum.w < 0 ? 0 : (sum.w > 255.5 ? 255.5 : sum.w);

        switch(vsout) {
        case 3:
        case 2:
            ((uchar4 *)out)[0] = convert<uchar4>(sum);
            break;
        case 1:
            ((uchar2 *)out)[0] = convert<uchar2>(sum.xy);
            break;
        case 0:
            ((uchar *)out)[0] = sum.x;
            break;
        }
    }
    //ALOGE("out %p %f %f %f %f", out, ((float *)out)[0], ((float *)out)[1], ((float *)out)[2],
    //      ((float *)out)[3]);
}