| 33 | } |
| 34 | |
| 35 | muduo::string Plot::plotCpu(const std::vector<double>& data) |
| 36 | { |
| 37 | gdImageFilledRectangle(image_, 0, 0, width_, height_, background_); |
| 38 | if (data.size() > 1) |
| 39 | { |
| 40 | gdImageSetThickness(image_, 2); |
| 41 | double max = *std::max_element(data.begin(), data.end()); |
| 42 | if (max >= 10.0) |
| 43 | { |
| 44 | max = ceil(max); |
| 45 | } |
| 46 | else |
| 47 | { |
| 48 | max = std::max(0.1, ceil(max*10.0) / 10.0); |
| 49 | } |
| 50 | label(max); |
| 51 | |
| 52 | for (size_t i = 0; i < data.size()-1; ++i) |
| 53 | { |
| 54 | gdImageLine(image_, |
| 55 | getX(i, data.size()), |
| 56 | getY(data[i] / max), |
| 57 | getX(i+1, data.size()), |
| 58 | getY(data[i+1]/max), |
| 59 | black_); |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | int total = totalSeconds_/samplingPeriod_; |
| 64 | gdImageSetThickness(image_, 1); |
| 65 | gdImageLine(image_, getX(0, total), getY(0)+2, getX(total, total), getY(0)+2, gray_); |
| 66 | gdImageLine(image_, getX(total, total), getY(0)+2, getX(total, total), getY(1)+2, gray_); |
| 67 | return toPng(); |
| 68 | } |
| 69 | |
| 70 | void Plot::label(double maxValue) |
| 71 | { |