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- import pygame
- change_speed = 2
- class DynamicBackground:
- def __init__(self, size):
- self.image_loaded = False
- self.size = size
- self.surface = pygame.Surface(self.size).convert()
- self.surface.fill((145, 16, 16))
- self.surface_image = pygame.Surface(self.size).convert()
- self.update = True
- def draw_background(self):
- if self.image_loaded:
- return self.surface_image.copy()
- else:
- return self.surface.copy()
- def should_update(self):
- if self.update:
- self.update = False
- return True
- else:
- return False
- def set_background_image(self, image):
- if image is not None:
- image_size = get_aspect_scale_size(image, self.size)
- target = pygame.transform.smoothscale(image, image_size)
- self.surface_image.fill((0, 0, 0))
- pos = (int((self.size[0] - image_size[0])/2),
- (int(self.size[1] - image_size[1])/2))
- self.surface_image.blit(blur_surf_times(
- target, self.size[0]/40, 10), pos)
- self.image_loaded = True
- else:
- self.image_loaded = False
- self.update = True
- def get_aspect_scale_size(img, new_size):
- size = img.get_size()
- aspect_x = new_size[0] / float(size[0])
- aspect_y = new_size[1] / float(size[1])
- if aspect_x > aspect_y:
- aspect = aspect_x
- else:
- aspect = aspect_y
- new_size = (int(aspect*size[0]), int(aspect*size[1]))
- return new_size
- def blur_surf_times(surface, amt, times):
- for i in range(times):
- surface = blur_surf(surface, amt)
- return surface
- # http://www.akeric.com/blog/?p=720
- def blur_surf(surface, amt):
- """
- Blur the given surface by the given 'amount'. Only values 1 and greater
- are valid. Value 1 = no blur.
- """
- scale = 1.0/float(amt)
- surf_size = surface.get_size()
- scale_size = (int(surf_size[0]*scale), int(surf_size[1]*scale))
- surf = pygame.transform.smoothscale(surface, scale_size)
- surf = pygame.transform.smoothscale(surf, surf_size)
- return surf
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