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"""
Benchmarks Agg rendering times.
"""
from __future__ import with_statement
import time
from scipy import stats, array, shape, arange, transpose, sin, cos
from kiva import agg
import kiva
def benchmark_real_time(cycles=10,n_pts=1000,sz=(1000,1000)):
""" Render a sin wave to the screen repeatedly. Clears
the screen between each rendering.
"""
print 'realtime:',
width,height = sz
pts = zeros((n_pts,2),Float)
x = pts[:,0]
y = pts[:,1]
interval = width / float(n_pts)
x[:] = arange(0,width,interval)
t1 = time.clock()
gc = agg.GraphicsContextBitmap(sz)
for i in range(cycles):
y[:] = height/2. + height/2. * sin(x*2*pi/width+i*interval)
#gc.clear()
gc.lines(pts)
gc.stroke_path()
#agg.write_bmp_rgb24("sin%d.bmp" % i,gc.bitmap)
t2 = time.clock()
tot_time = t2 - t1
print 'tot,per cycle:', tot_time, tot_time/cycles
return
def benchmark_compiled_path(cycles=10,n_pts=1000,sz=(1000,1000)):
""" Render a sin wave to a compiled_path then display it repeatedly.
"""
width,height = sz
pts = zeros((n_pts,2),Float)
x = pts[:,0]
y = pts[:,1]
interval = width / float(n_pts)
x[:] = arange(0,width,interval)
y[:] = height/2. + height/2. * sin(x*2*pi/n_pts)
path = agg.CompiledPath()
path.lines(pts)
#path.move_to(pts[0,0],pts[0,1])
#for x,y in pts[1:]:
# path.line_to(x,y)
t1 = time.clock()
gc = agg.GraphicsContextBitmap(sz)
for i in range(cycles):
#gc.clear()
gc.add_path(path)
gc.stroke_path()
t2 = time.clock()
tot_time = t2 - t1
print 'tot,per cycle:', tot_time, tot_time/cycles
return
def benchmark_draw_path_flags(cycles=10,n_pts=1000,sz=(1000,1000)):
print 'realtime:',
width,height = sz
pts = zeros((n_pts,2),Float)
x = pts[:,0]
y = pts[:,1]
interval = width / float(n_pts)
x[:] = arange(0,width,interval)
flags = [kiva.FILL, kiva.EOF_FILL, kiva.STROKE,
kiva.FILL_STROKE, kiva.EOF_FILL_STROKE]
for flag in flags:
t1 = time.clock()
for i in range(cycles):
gc = agg.GraphicsContextBitmap(sz)
y[:] = height/2. + height/2. * sin(x*2*pi/width+i*interval)
gc.lines(pts)
gc.draw_path(flag)
t2 = time.clock()
agg.write_bmp_rgb24("draw_path%d.bmp" % flag,gc.bitmap)
tot_time = t2 - t1
print 'tot,per cycle:', tot_time, tot_time/cycles
return
def star_array(size=40):
half_size = size * .5
tenth_size = size * .1
star_pts = [ array((tenth_size,0)),
array((half_size,size - tenth_size)),
array((size - tenth_size, 0)),
array((0,half_size)),
array((size,half_size)),
array((tenth_size,0)),
]
return array(star_pts)
def circle_array(size=5):
x = arange(0,6.3,.1)
pts = transpose(array((cos(x), sin(x)))).copy()*size/2.
return pts
def star_path_gen(size = 40):
star_path = agg.CompiledPath()
#spts = circle_array()
spts = star_array()
#star_path.lines(spts)
star_path.move_to(spts[0][0],spts[0][1])
for x,y in spts:
star_path.line_to(x,y)
star_path.close_path()
return star_path
def benchmark_individual_symbols(n_pts=1000,sz=(1000,1000)):
"Draws some stars"
width,height = sz
pts = stats.norm.rvs(size=(n_pts,2)) * array(sz)/8.0 + array(sz)/2.0
print pts[5,:]
print shape(pts)
star_path = star_path_gen()
gc = agg.GraphicsContextArray(sz)
gc.set_fill_color((1.0,0.0,0.0,0.1))
gc.set_stroke_color((0.0,1.0,0.0,0.6))
t1 = time.clock()
for x,y in pts:
with gc:
gc.translate_ctm(x,y)
gc.add_path(star_path)
gc.draw_path()
t2 = time.clock()
gc.save("benchmark_symbols1.bmp")
tot_time = t2 - t1
print 'star count, tot,per shape:', n_pts, tot_time, tot_time / n_pts
return
def benchmark_rect(n_pts=1000,sz=(1000,1000)):
"Draws a number of randomly-placed renctangles."
width,height = sz
pts = stats.norm.rvs(size=(n_pts,2)) * array(sz)/8. + array(sz)/2.
print pts[5,:]
print shape(pts)
gc = agg.GraphicsContextArray(sz)
gc.set_fill_color((1.0,0.0,0.0,0.1))
gc.set_stroke_color((0.0,1.0,0.0,0.6))
t1 = time.clock()
for x,y in pts:
with gc:
gc.translate_ctm(x,y)
gc.rect(-2.5,-2.5,5,5)
gc.draw_path()
t2 = time.clock()
gc.save("benchmark_rect.bmp")
tot_time = t2 - t1
print 'rect count, tot,per shape:', n_pts, tot_time, tot_time / n_pts
return
def benchmark_symbols_all_at_once(n_pts=1000,sz=(1000,1000)):
"""
Renders all the symbols.
"""
width,height = sz
pts = stats.norm.rvs(size=(n_pts,2)) * array(sz)/8. + array(sz)/2.
star_path = agg.CompiledPath()
star_path.lines(circle_array())
gc = agg.GraphicsContextArray(sz)
gc.set_fill_color((1.0,0.0,0.0,0.1))
gc.set_stroke_color((0.0,1.0,0.0,0.6))
path = agg.CompiledPath()
t1 = time.clock()
for x,y in pts:
path.save_ctm()
path.translate_ctm(x,y)
path.add_path(star_path)
path.restore_ctm()
gc.add_path(path)
t2 = time.clock()
gc.draw_path()
t3 = time.clock()
gc.save("benchmark_symbols2.bmp")
build_path_time = t2 - t1
render_path_time = t3 - t2
tot_time = t3 - t1
print 'star count, tot,building path, rendering path:', n_pts, \
tot_time, build_path_time,render_path_time
return
if __name__ == '__main__':
#sz = (1000,1000)
sz = (500,500)
n_pts = 1000
#benchmark_real_time(n_pts = n_pts, sz = sz)
#benchmark_compiled_path(n_pts = n_pts, sz=sz)
benchmark_individual_symbols(n_pts = n_pts, sz=sz)
benchmark_rect(n_pts = n_pts, sz=sz)
benchmark_symbols_all_at_once(n_pts = n_pts, sz=sz)
#benchmark_draw_path_flags(n_pts = n_pts, sz=sz)
# EOF
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