"""
Benchmarks Agg rendering times.
"""
from __future__ import print_function

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:', end=' ')
    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:', end=' ')
    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
