def DISABLED_memleak( self ): """Test agg backend for memory leaks.""" fontname = '/usr/local/share/matplotlib/Vera.ttf' fname = self.outFile( "agg_memleak_%05d.png" ) N = 200 for i in range( N ): gc = GraphicsContextBase() gc.set_clip_rectangle( [20, 20, 20, 20] ) o = RendererAgg( 400, 400, 72 ) for j in range( 50 ): xs = [ 400*int(rand()) for k in range(8) ] ys = [ 400*int(rand()) for k in range(8) ] rgb = (1, 0, 0) pnts = zip( xs, ys ) o.draw_polygon( gc, rgb, pnts ) o.draw_polygon( gc, None, pnts ) for j in range( 50 ): x = [ 400*int(rand()) for k in range(4) ] y = [ 400*int(rand()) for k in range(4) ] o.draw_lines( gc, x, y ) for j in range( 50 ): args = [ 400*int(rand()) for k in range(4) ] rgb = (1, 0, 0) o.draw_rectangle( gc, rgb, *args ) if 1: # add text font = FT2Font( fontname ) font.clear() font.set_text( 'hi mom', 60 ) font.set_size( 12, 72 ) o.draw_text_image( font.get_image(), 30, 40, gc ) o.write_png( fname % i ) val = report_memory( i ) if i==1: start = val end = val avgMem = (end - start) / float(N) print 'Average memory consumed per loop: %1.4f\n' % (avgMem) #TODO: Verify the expected mem usage and approximate tolerance that should be used self.checkClose( 0.32, avgMem, absTol = 0.1 )
def write_header(self, resolution=72): from matplotlib.backends.backend_agg import RendererAgg, Figure from matplotlib.backend_bases import GraphicsContextBase try: from matplotlib.transforms import Value except ImportError: dpi = resolution else: dpi = Value(resolution) self.renderer = RendererAgg(self.w, self.h, dpi) self.figure = Figure() self.gc = GraphicsContextBase() self.gc.set_linewidth(.2)
def new_gc(self): return GraphicsContextBase()
from matplotlib.backend_bases import GraphicsContextBase from matplotlib.backends._backend_agg import RendererAgg def report_memory(i): pid = os.getpid() a2 = os.popen('ps -p %d -o rss,sz' % pid).readlines() print i, ' ', a2[1], return int(a2[1].split()[0]) fname = '/usr/local/share/matplotlib/Vera.ttf' N = 200 for i in range(N): gc = GraphicsContextBase() gc.set_clip_rectangle([20, 20, 20, 20]) o = RendererAgg(400, 400, 72) for j in range(50): xs = [400 * int(rand()) for k in range(8)] ys = [400 * int(rand()) for k in range(8)] rgb = (1, 0, 0) pnts = zip(xs, ys) o.draw_polygon(gc, rgb, pnts) o.draw_polygon(gc, None, pnts) for j in range(50): x = [400 * int(rand()) for k in range(4)] y = [400 * int(rand()) for k in range(4)] o.draw_lines(gc, x, y)