Source

pygame / test / blit_test.py

Lenard Lindstrom af8675f 















illume e437f9d 




































illume befac11 
illume e437f9d 

illume befac11 
illume e437f9d 

illume a84f4c9 
illume befac11 











illume e437f9d 



illume a84f4c9 
illume e437f9d 

illume e8c1143 


illume a84f4c9 
illume e8c1143 
illume e437f9d 
illume e8c1143 


illume a84f4c9 
illume e8c1143 
illume e437f9d 



akalias 02d49ef 
if __name__ == '__main__':
    import sys
    import os
    pkg_dir = os.path.split(os.path.abspath(__file__))[0]
    parent_dir, pkg_name = os.path.split(pkg_dir)
    is_pygame_pkg = (pkg_name == 'tests' and
                     os.path.split(parent_dir)[1] == 'pygame')
    if not is_pygame_pkg:
        sys.path.insert(0, parent_dir)
else:
    is_pygame_pkg = __name__.startswith('pygame.tests.')

if is_pygame_pkg:
    from pygame.tests.test_utils import unittest
else:
    from test.test_utils import unittest
import pygame
from pygame.locals import *

class BlitTest( unittest.TestCase ):
    def test_SRCALPHA( self ):
        """ SRCALPHA tests.
        """
        #blend(s, 0, d) = d
        s = pygame.Surface((1,1), SRCALPHA, 32)
        s.fill((255, 255,255, 0))

        d = pygame.Surface((1,1), SRCALPHA, 32)
        d.fill((0, 0,255, 255))

        s.blit(d, (0,0))
        self.assertEqual(s.get_at((0,0)), d.get_at((0,0)) )

        #blend(s, 255, d) = s
        s = pygame.Surface((1,1), SRCALPHA, 32)
        s.fill((123, 0, 0, 255))
        s1 = pygame.Surface((1,1), SRCALPHA, 32)
        s1.fill((123, 0, 0, 255))
        d = pygame.Surface((1,1), SRCALPHA, 32)
        d.fill((10, 0,0, 0))
        s.blit(d, (0,0))
        self.assertEqual(s.get_at((0,0)), s1.get_at((0,0)) )

        #TODO: these should be true too.
        #blend(0, sA, 0) = 0
        #blend(255, sA, 255) = 255
        #blend(s, sA, d) <= 255

    def test_BLEND( self ):
        """ BLEND_ tests.
        """

        #test that it doesn't overflow, and that it is saturated.
        s = pygame.Surface((1,1), SRCALPHA, 32)
        s.fill((255, 255,255, 0))

        d = pygame.Surface((1,1), SRCALPHA, 32)
        d.fill((0, 0,255, 255))

        s.blit(d, (0,0), None, BLEND_ADD)

        #print "d %s" % (d.get_at((0,0)),)
        #print s.get_at((0,0))
        #self.assertEqual(s.get_at((0,0))[2], 255 )
        #self.assertEqual(s.get_at((0,0))[3], 0 )



        s.blit(d, (0,0), None, BLEND_RGBA_ADD)
        #print s.get_at((0,0))
        self.assertEqual(s.get_at((0,0))[3], 255 )


        # test adding works.
        s.fill((20, 255,255, 0))
        d.fill((10, 0,255, 255))
        s.blit(d, (0,0), None, BLEND_ADD)
        self.assertEqual(s.get_at((0,0))[2], 255 )

        # test subbing works.
        s.fill((20, 255,255, 0))
        d.fill((10, 0,255, 255))
        s.blit(d, (0,0), None, BLEND_SUB)
        self.assertEqual(s.get_at((0,0))[0], 10 )

        # no overflow in sub blend.
        s.fill((20, 255,255, 0))
        d.fill((30, 0,255, 255))
        s.blit(d, (0,0), None, BLEND_SUB)
        self.assertEqual(s.get_at((0,0))[0], 0 )



if __name__ == '__main__':
    unittest.main()