content: import numpy as np
  import matplotlib.pyplot as plt
  
  d = np.arange(100).reshape(10, 10)
  x, y = np.meshgrid(np.arange(11), np.arange(11))
  
  theta = 0.25*np.pi
  xx = x*np.cos(theta) - y*np.sin(theta)
  yy = x*np.sin(theta) + y*np.cos(theta)
  
  ax1 = plt.subplot(221)
  ax1.set_aspect(1)
  ax1.pcolormesh(xx, yy, d)
  ax1.set_title("No Rasterization")
  
  ax2 = plt.subplot(222)
  ax2.set_aspect(1)
  ax2.set_title("Rasterization")
  
  m = ax2.pcolormesh(xx, yy, d)
  m.set_rasterized(True)
  
  ax3 = plt.subplot(223)
  ax3.set_aspect(1)
  ax3.pcolormesh(xx, yy, d)
  ax3.text(0.5, 0.5, "Text", alpha=0.2,
           va="center", ha="center", size=50, transform=ax3.transAxes)
  
  ax3.set_title("No Rasterization")
  
  
  ax4 = plt.subplot(224)
  ax4.set_aspect(1)
  m = ax4.pcolormesh(xx, yy, d)
  m.set_zorder(-20)
  
  ax4.text(0.5, 0.5, "Text", alpha=0.2,
           zorder=-15,
           va="center", ha="center", size=50, transform=ax4.transAxes)
  
  ax4.set_rasterization_zorder(-10)
  
  ax4.set_title("Rasterization z$<-10$")
  
  
  # ax2.title.set_rasterized(True) # should display a warning
  
  plt.savefig("test_rasterization.pdf", dpi=150)
  plt.savefig("test_rasterization.eps", dpi=150)
  
  if not plt.rcParams["text.usetex"]:
      plt.savefig("test_rasterization.svg", dpi=150)
      # svg backend currently ignores the dpi
  