具有透明背景的png图像在pygame 2.0.0中不起作用[重复]答案

【问题标题】：png images with transparent background don't work in pygame 2.0.0 [duplicate]具有透明背景的png图像在pygame 2.0.0中不起作用[重复]
【发布时间】：2021-04-24 21:56:15
【问题描述】：

当我将具有透明背景的 png 图像加载为精灵图像时，它上面有非常奇怪的背景。我使用 Photoshop 绘制图像。

另外，还有一个错误：libpng 警告：iCCP：已知不正确的 sRGB 配置文件

只有在我关闭 pygame 窗口时才会出现。

我在下面附上了我的代码、png 图像和它是如何工作的屏幕截图。

import os
import pygame

FPS = 50
WIDTH, HEIGHT = 500, 500

pygame.init()

size = width, height = WIDTH, HEIGHT
screen = pygame.display.set_mode(size)

all_sprites = pygame.sprite.Group()
player_group = pygame.sprite.Group()


def load_image(name, color_key=None):
    fullname = os.path.join('textures', name)
    try:
        image = pygame.image.load(fullname).convert()
    except pygame.error as message:
        print('Cannot load image:', name)
        raise SystemExit(message)

    if color_key is not None:
        if color_key == -1:
            color_key = image.get_at((0, 0))
        image.set_colorkey(color_key)
    else:
        image = image.convert_alpha()
    return image


class Player(pygame.sprite.Sprite):
    def __init__(self, pos_x, pos_y):
        super().__init__(player_group, all_sprites)
        self.image = pygame.transform.scale(load_image('baloon.png', 1), (42, 94))

        self.rect = self.image.get_rect().move(pos_x, pos_y)

    def update(self, *args):
        pass


clock = pygame.time.Clock()
player = Player(200, 200)
running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
    screen.fill(pygame.Color("#AAAAAA"))
    all_sprites.draw(screen)

    all_sprites.update()
    pygame.display.flip()
    clock.tick(FPS)
pygame.quit()

baloon.png

this is how does it seen

【问题讨论】：

标签： python pygame png

【解决方案1】：

PNGs 具有每个像素的 alpha。无需设置颜色键。只需blit 油箱上的保护装置。 convert() 将像素格式更改为每个像素没有 alpha 的格式并删除透明度信息。请改用convert_alpha()：

class Player(pygame.sprite.Sprite):
    def __init__(self, pos_x, pos_y):
        super().__init__(player_group, all_sprites)
        slef.image = pygame.image.load('baloon.png').convert_alpha()
        self.image = pygame.transform.scale(slef.image, (42, 94))

我建议修改load_image函数：

def load_image(name, per_pixel_alpha = False, color_key = None):
    fullname = os.path.join('textures', name)
    try:
        image = pygame.image.load(fullname)
    except pygame.error as message:
        print('Cannot load image:', name)
        raise SystemExit(message)

    if per_pixel_alpha:
        image = image.convert_alpha()
    else:
        image = image.convert()

    if color_key is not None:
        if color_key == -1:
            color_key = image.get_at((0, 0))
        image.set_colorkey(color_key)
   
    return image

class Player(pygame.sprite.Sprite):
    def __init__(self, pos_x, pos_y):
        super().__init__(player_group, all_sprites)
        self.image = pygame.transform.scale(load_image('baloon.png', True), (42, 94))

        self.rect = self.image.get_rect().move(pos_x, pos_y)

    def update(self, *args):
        pass

【讨论】：