pygame图像透明度混乱 [英] Pygame image transparency confusion

问题描述

我在此处阅读了与此问题相关的前20条帖子，在Google上阅读了许多示例，并尝试使用 .convert()， .convert_alpha()两者均未尝试使用.png，.gif和Google上的前5种不同图片.请有人帮我弄清楚如何使作品具有透明背景.这是所有代码:

  import pygamepygame.init()打印("1")screen_size =(600，600)蓝色=(100，225，225)屏幕= pygame.display.set_mode(screen_size)pygame.display.set_caption(国际象棋")SpriteSheet类:def __init __(自己，文件名):加载"工作表.尝试:self.sheet = pygame.image.load(filename).convert.alpha()除了pygame.error如e:print(f无法加载Spritesheet图片:{filename}")提高SystemExit(e)def image_at(self，矩形，colorkey =无):"从特定的矩形加载特定的图像.#从x，y，x +偏移量，y +偏移量加载图像.rect = pygame.Rect(矩形)图片= pygame.Surface(rect.size)image.blit(self.sheet，(0，0)，rect)如果colorkey不是None:如果colorkey == -1:colorkey = image.get_at((0,0))image.set_colorkey(colorkey，pygame.RLEACCEL)返回图片def images_at(self，rects，colorkey = None):"加载一整堆图像，并将它们作为列表返回.返回[rects中的rect的[self.image_at(rect，colorkey)]]def load_strip(self，rect，image_count，colorkey = None):"加载整个图像带，并将其作为列表返回.tups = [(rect [0] + rect [2] * x，rect [1]，rect [2]，rect [3])对于x在范围内(image_count)]返回self.images_at(tups，colorkey)打印("2")类游戏:def __init __():self.playing =错误self.move = 0self.player_turn = 1self.quit =错误def退出(自己):self.quit = True打印("3")类件:def __init __():self.sprite =无self.spacial = [0，0，0]self.temporal = [0，0]self.position = [self.spacial，self.temporal]self.color ="self.type ="打印("4")Chess_image = SpriteSheet('ChessPiecesArray.png')颜色= [白色"，黑色"]类型= ["K"，"Q"，"B"，"N"，"R"，"P"]rect_piece =(0，0，133，133)打印("5")ChessSet类:def __init __():self.set = []def create_set():对于我在范围(2)中:对于范围(6)中的j:this_piece = Piece()this_piece.color = colors [i]this_piece.type =类型[j]rect_set =(133 * j，133 * i，133 *(j + 1)，133 *(i + 1))this_piece.sprite = SpriteSheet.image_at(chess_image，rect_set)self.set.append(this_piece)打印("6")棋= Game()set_one = ChessSet()set_one.create_set()打印("7")虽然不是chess.quit:对于pygame.event.get()中的事件:如果event.type == pygame.KEYDOWN:如果event.key == pygame.K_q:Chess.quit()screen.fill(蓝色)screen.blit(set_one.set [0] .sprite，(10，10))pygame.display.flip() 

以下是我花时间尝试的一些图片:

这是我的错误消息在我的代码与建议的更改的屏幕快照

解决方案

如果将透明的 Surface 复制到另一个 Surface ，则目标 Surface 必须分别为每个像素alpha提供透明度.

在创建新曲面时可以启用其他功能.设置

，并修改类 SpriteSheet 的方法 image_at .使用 pygame.SRCALPHA :

  SpriteSheet类:#[...]def image_at(self，矩形，colorkey =无):"从特定的矩形加载特定的图像.#从x，y，x +偏移量，y +偏移量加载图像.rect = pygame.Rect(矩形)图片= pygame.Surface(rect.size，pygame.SRCALPHA)#< ----image.blit(self.sheet，(0，0)，rect)如果colorkey不是None:如果colorkey == -1:colorkey = image.get_at((0,0))image.set_colorkey(colorkey，pygame.RLEACCEL)返回图片 

或使用 convert_alpha() :

  SpriteSheet类:#[...]def image_at(self，矩形，colorkey =无):"从特定的矩形加载特定的图像.#从x，y，x +偏移量，y +偏移量加载图像.rect = pygame.Rect(矩形)图片= pygame.Surface(rect.size).convert_alpha()#< ----image.fill((0，0，0，0))#< ---image.blit(self.sheet，(0，0)，rect)如果colorkey不是None:如果colorkey == -1:colorkey = image.get_at((0,0))image.set_colorkey(colorkey，pygame.RLEACCEL)返回图片 

另请参阅:

• 如何我可以在Pygame中使用透明Backround制作图像吗?
• 使用pygame显示unicode符号

  I have read the top 20 posts relating to this issue here, read many examples on Google, tried using .convert(), .convert_alpha(), tried with neither, tried with .png, .gif, tried with the top 5 different images on google. Please someone help me figure out how to make the pieces show with a transparent background. Here is ALL the code:

  import pygame
  pygame.init()
  print("1")
  screen_size = (600, 600)
  blue = (100, 225, 225)
  screen = pygame.display.set_mode(screen_size)
  pygame.display.set_caption("Chess")
  
  
  class SpriteSheet:
  
      def __init__(self, filename):
          """Load the sheet."""
          try:
              self.sheet = pygame.image.load(filename).convert.alpha()
          except pygame.error as e:
              print(f"Unable to load spritesheet image: {filename}")
              raise SystemExit(e)
  
  
      def image_at(self, rectangle, colorkey = None):
          """Load a specific image from a specific rectangle."""
          # Loads image from x, y, x+offset, y+offset.
          rect = pygame.Rect(rectangle)
          image = pygame.Surface(rect.size)
          image.blit(self.sheet, (0, 0), rect)
          if colorkey is not None:
              if colorkey == -1:
                  colorkey = image.get_at((0,0))
              image.set_colorkey(colorkey, pygame.RLEACCEL)
          return image
  
      def images_at(self, rects, colorkey = None):
          """Load a whole bunch of images and return them as a list."""
          return [self.image_at(rect, colorkey) for rect in rects]
  
      def load_strip(self, rect, image_count, colorkey = None):
          """Load a whole strip of images, and return them as a list."""
          tups = [(rect[0]+rect[2]*x, rect[1], rect[2], rect[3])
                  for x in range(image_count)]
          return self.images_at(tups, colorkey)
  print("2")
  
  class Game:
      def __init__(self):
          self.playing = False
          self.move = 0
          self.player_turn = 1
          self.quit = False
  
      def quit(self):
          self.quit = True
  
  print("3")
  class Piece:
      def __init__(self):
          self.sprite = None
          self.spacial = [0, 0, 0]
          self.temporal = [0, 0]
          self.position = [self.spacial, self.temporal]
          self.color = ""
          self.type = ""
  
  print("4")
  chess_image = SpriteSheet('ChessPiecesArray.png')
  colors = ["White", "Black"]
  types = ["K", "Q", "B", "N", "R", "P"]
  rect_piece = (0, 0, 133, 133)
  
  print("5")
  
  
  class ChessSet:
      def __init__(self):
          self.set = []
  
      def create_set(self):
          for i in range(2):
              for j in range(6):
                  this_piece = Piece()
                  this_piece.color = colors[i]
                  this_piece.type = types[j]
                  rect_set = (133*j, 133*i, 133*(j+1), 133*(i+1))
                  this_piece.sprite = SpriteSheet.image_at(chess_image, rect_set)
                  self.set.append(this_piece)
  
  print("6")
  chess = Game()
  set_one = ChessSet()
  set_one.create_set()
  
  print("7")
  while not chess.quit:
      for event in pygame.event.get():
          if event.type == pygame.KEYDOWN:
              if event.key == pygame.K_q:
                  chess.quit()
      screen.fill(blue)
      screen.blit(set_one.set[0].sprite, (10, 10))
  
      pygame.display.flip()
  

  Here are a few images I spent time trying:

  EDIT: Here is the screenshot of my error message over my code with the suggested change

  解决方案

  If you copy a transparent Surface to another Surface the target Surface has to provide transparency respectively per pixel alpha.

  You can enable additional functions when creating a new surface. Set the SRCALPHA flag to create a surface with an image format that includes a per-pixel alpha. The initial value of the pixels is (0, 0, 0, 0):

  my_surface = pygame.Surface((width, height), pygame.SRCALPHA)
  

  Use the following image

  and adapt the method image_at of the class SpriteSheet. Use pygame.SRCALPHA:

  class SpriteSheet:
      # [...]
  
      def image_at(self, rectangle, colorkey = None):
          """Load a specific image from a specific rectangle."""
          # Loads image from x, y, x+offset, y+offset.
          rect = pygame.Rect(rectangle)
          
          image = pygame.Surface(rect.size, pygame.SRCALPHA) # <----
          
          image.blit(self.sheet, (0, 0), rect)
          if colorkey is not None:
              if colorkey == -1:
                  colorkey = image.get_at((0,0))
              image.set_colorkey(colorkey, pygame.RLEACCEL)
          return image
  

  Or use convert_alpha():

  class SpriteSheet:
      # [...]
  
      def image_at(self, rectangle, colorkey = None):
          """Load a specific image from a specific rectangle."""
          # Loads image from x, y, x+offset, y+offset.
          rect = pygame.Rect(rectangle)
          
          image = pygame.Surface(rect.size).convert_alpha() # <----
          image.fill((0, 0, 0, 0))                          # <---
          
          image.blit(self.sheet, (0, 0), rect)
          if colorkey is not None:
              if colorkey == -1:
                  colorkey = image.get_at((0,0))
              image.set_colorkey(colorkey, pygame.RLEACCEL)
          return image
  

  See also:

  • How can I make an Image with a transparent Backround in Pygame?
  • How do I blit a PNG with some transparency onto a surface in Pygame?

  ---

  Note that chess pieces can also be drawn through a Unicode text.
  See Displaying unicode symbols using pygame

  这篇关于pygame图像透明度混乱的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！