Function MNNSamplerCopyCommon

source/backend/cpu/compute/ImageProcessFunction.cpp:844–856

}

void MNNSamplerCopyCommon(const unsigned char* source, unsigned char* dest, MNN::CV::Point* points, size_t sta,
                          size_t count, size_t iw, size_t ih, size_t yStride, int bpp) {
    dest = dest + bpp * sta;
    MNN::CV::Point curPoints;
    curPoints.fX   = points[0].fX;
    curPoints.fY   = points[0].fY;
    float xMax     = iw - 1;
    float yMax     = ih - 1;
    int y          = (int)roundf(__clamp(curPoints.fY, 0, yMax));
    int x          = (int)roundf(__clamp(curPoints.fX, 0, xMax));
    auto sourcePos = y * yStride + bpp * x;
    ::memcpy(dest, source + sourcePos, bpp * count);
}

void MNNSamplerI420Copy(const unsigned char* source, unsigned char* dest, MNN::CV::Point* points, size_t sta,
                        size_t count, size_t capacity, size_t iw, size_t ih, size_t yStride) {