DirectPython 11 Code

"""Shows how to use threads to speed up resource loading."""

import time

import d3d11
import d3d11x
from d3d11c import *

message = """Comparison between normal texture loading and threaded loading:

Normal:   %.3f seconds
Threaded: %.3f seconds

Threaded version was ~%.2f times %s.
"""

class SampleThreaded(d3d11x.Frame):
    def onCreate(self):
        self.window.show(SW_HIDE)
    
        textureName = d3d11x.getResourceDir("Textures", "static-barrel.dds")
    
        #Warm the filesystem cache.
        dummy = d3d11.Texture(textureName)
        
        COUNT = 10
        #Force format conversion, heavy work for the CPU.
        FORMAT = FORMAT_R8G8B8A8_UNORM
        
        #Normal loading.
        normalStart = time.clock()
        for x in range(COUNT):
            t = d3d11.Texture(textureName, (0, 0, 1, 0), FORMAT)
        normalTime = time.clock() - normalStart
           
        #Threaded loading.
        threadStart = time.clock()
        loader = d3d11x.ThreadedLoader()
        for x in range(COUNT):
            loader.addJob(self, "t", d3d11.Texture, textureName, (0, 0, 1, 0), FORMAT)
        #loader.wait()
        loader.join()
        threadTime = time.clock() - threadStart

        comp = normalTime / threadTime
        result = "faster"
        if comp < 1.0:
            result = "slower"
        
        d3d11.messageBox(self.window, message % (normalTime, threadTime, comp, result), "Results", 0)
        
        self.exit()
        
if __name__ == "__main__":
    sample = SampleThreaded("Threading - DirectPython 11", __doc__)
    sample.mainloop()