Re: [pygame] Cycling images

[lorca <pylorca@yahoo.com.ar>]

to load an image, I use this function: (this function load the image 
with alpha channel)

def load_image(name, colorkey=None):
   #fullname = os.path.join('data', name)
   try:
       image = pygame.image.load(name)
   except pygame.error, message:
       print 'Cannot load image:', name
       raise SystemExit, message
   # Para ver si la imagen soporta canal alpha
   if image.get_alpha() is None:
       print name
       print "NO apha"
       image = image.convert()
   else:
       print name
       print "APLHA"
       image = image.convert_alpha()
   # ######################################
   if colorkey is not None:
       #print "no none"
       if colorkey is -1:
           colorkey = image.get_at((0,0))
       image.set_colorkey(colorkey, RLEACCEL)
   return image, image.get_rect()
  
but in this function the image lost the alpha channel:

def animstrip(img, width=0, colorkey=None):
   if not width:
       width = img.get_height()
  
   size = width, img.get_height()
   images = []
   for x in range(0, img.get_width(), width):
       if img.get_alpha() is not None:
           i = pygame.Surface(size).convert_alpha()
       else:
           i = pygame.Surface(size).convert()
       i.blit(img, (0, 0), ((x, 0), size))
       # si se seteo colorkey toma ese color como transparente
       if colorkey is not None:
           if colorkey is -1:
               # toma el color del pixel a la posicion (0,0)
               colorkey = i.get_at((0,0))
           i.set_colorkey(colorkey, RLEACCEL)
      
       images.append(i)
   #print images
   return images



> What you want to do is check the source img, and then conditionally create your new 
> surface with or without an alpha channel.  Do the creation in one step:
>
> if img.get_alpha:
>   i = Surface(size).convert_alpha()
> else:
>   i = Surface(size).convert()
>
> i.blit(yada yada)
>
> Regards,
> Steve
>
>