Function GetImageDiffRect

exporter/src/utils/ImageData.cpp:93–131

}

void GetImageDiffRect(ImageRect& rect, const uint8_t* preImage, const uint8_t* curImage, int width,
                      int height, int stride) {
  if (preImage == nullptr || curImage == nullptr) {
    return;
  }
  int minX = width - 1;
  int minY = height - 1;
  int maxX = 0;
  int maxY = 0;

  for (int y = 0; y < height; y++) {
    const auto preData =
        reinterpret_cast<const uint32_t*>(static_cast<const void*>(preImage + y * stride));
    const auto curData =
        reinterpret_cast<const uint32_t*>(static_cast<const void*>(curImage + y * stride));

    for (int x = 0; x < width; x++) {
      if (preData[x] == curData[x]) {
        continue;
      }
      minX = std::min(minX, x);
      minY = std::min(minY, y);
      maxX = std::max(maxX, x);
      maxY = std::max(maxY, y);
    }
  }

  if (minX < maxX) {
    rect.xPos = minX;
    rect.yPos = minY;
    rect.width = maxX - minX + 1;
    rect.height = maxY - minY + 1;
  } else {
    rect.xPos = 0;
    rect.yPos = 0;
    rect.width = 0;
    rect.height = 0;
  }
}

static bool InRange(int val, int pos, int width) {
  return val >= pos && val <= pos + width;