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"""Funtions for manipulating pygame surfaces."""
import pygame
def subsurface(s,r):
"""Return the subsurface of a surface, with some help, checks."""
r = pygame.Rect(r)
if r.x < 0 or r.y < 0:
raise Exception("rectangle out of bounds: surface=%dx%d, rect=%s" % (
s.get_width(),s.get_height(),r))
w,h = s.get_width(),s.get_height()
if r.right > w:
r.w -= r.right-w
if r.bottom > h:
r.h -= r.bottom-h
assert(r.w >= 0 and r.h >= 0)
return s.subsurface(r)
class ProxySurface:
"""
A surface-like object which smartly handle out-of-area blitting.
Note that only one of parent and real_surface should be supplied.
Arguments:
parent -- a ProxySurface object
real_surface -- a pygame Surface object
Attributes:
mysubsurface -- a real and valid pygame.Surface object to be used
for blitting.
x, y -- if the proxy surface is to the left or above the parent
offset -- an option which let you scroll the whole blitted content
"""
def __init__(self, parent, rect, real_surface, offset=(0, 0)):
self.offset = offset
self.x = self.y = 0
if rect.x < 0: self.x = rect.x
if rect.y < 0: self.y = rect.y
self.real_surface = real_surface
if real_surface == None:
self.mysubsurface = parent.mysubsurface.subsurface(
parent.mysubsurface.get_rect().clip(rect))
else:
self.mysubsurface = real_surface.subsurface(
real_surface.get_rect().clip(rect))
rect.topleft = (0, 0)
self.rect = rect
def blit(self, s, pos, rect=None):
if rect == None: rect = s.get_rect()
pos = (pos[0] + self.offset[0] + self.x, pos[1] + self.offset[1] + self.y)
self.mysubsurface.blit(s, pos, rect)
def subsurface(self, rect):
r = pygame.Rect(rect).move(self.offset[0] + self.x,
self.offset[1] + self.y)
return ProxySurface(self, r, self.real_surface)
def fill(self, color, rect=None):
if rect != None: self.mysubsurface.fill(color, rect)
else: self.mysubsurface.fill(color)
def get_rect(self): return self.rect
def get_width(self): return self.rect[2]
def get_height(self): return self.rect[3]
def get_abs_offset(): return self.rect[:2]
def get_abs_parent(): return self.mysubsurface.get_abs_parent()
def set_clip(self, rect=None):
if rect == None:
self.mysubsurface.set_clip(self.mysubsurface.get_rect())
else:
rect = [rect[0] + self.offset[0] + self.x, rect[1] + self.offset[0] + self.y, rect[2], rect[3]]
self.mysubsurface.set_clip(rect)
class xProxySurface:
"""This class is obsolete and is scheduled to be removed."""
def __init__(self, parent, rect, real_surface, offset=(0, 0)):
self.offset = offset
self.x = self.y = 0
if rect[0] < 0: self.x = rect[0]
if rect[1] < 0: self.y = rect[1]
self.real_surface = real_surface
if real_surface == None:
self.mysubsurface = parent.mysubsurface.subsurface(parent.mysubsurface.get_rect().clip(rect))
else:
self.mysubsurface = real_surface.subsurface(real_surface.get_rect().clip(rect))
rect[0], rect[1] = 0, 0
self.rect = rect
def blit(self, s, pos, rect=None):
if rect == None: rect = s.get_rect()
pos = (pos[0] + self.offset[0] + self.x, pos[1] + self.offset[1] + self.y)
self.mysubsurface.blit(s, pos, rect)
def subsurface(self, rect): return ProxySurface(self, pygame.Rect(rect).move(self.offset[0] + self.x, self.offset[1] + self.y),self.real_surface)
def fill(self, color, rect=None):
if rect != None: self.mysubsurface.fill(color, rect)
else: self.mysubsurface.fill(color)
def get_rect(self): return self.rect
def get_width(self): return self.rect[2]
def get_height(self): return self.rect[3]
def get_abs_offset(): return self.rect[:2]
def get_abs_parent(): return self.mysubsurface.get_abs_parent()
def set_clip(self, rect=None):
if rect == None:
self.mysubsurface.set_clip(self.mysubsurface.get_rect())
else:
rect = [rect[0] + self.offset[0] + self.x, rect[1] + self.offset[0] + self.y, rect[2], rect[3]]
self.mysubsurface.set_clip(rect)
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