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我正在尝试以比它们的源更小的尺寸显示图像，虽然我已经实现了这一点，但在 1080p 以外的任何分辨率上质量都很糟糕。到目前为止，这是我的代码：

import random
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.core.window import Window
from kivy.uix.image import Image
from kivy.logger import Logger
from kivy.metrics import Metrics
from kivy.graphics import Color, Rectangle
from kivy.uix.scatter import Scatter

Window.fullscreen = True
Window.size = (1920, 1080)

Player1Hand=['Spade', 'Spade', 'Spade',
                        'Heart', 'Heart',
                        'Heart', 'Diamond', 'Club',
                        'Club', 'Club']

random.shuffle(Player1Hand)
global Draw_Card
Draw_Card = 0

class Sprite(Image):

    def __init__(self, **kwargs):
        super(Sprite, self).__init__(allow_stretch=True, **kwargs)
        self.texture.mag_filter = 'linear'
        w, h = self.texture_size
        self.size = (params.scale * w, params.scale * h)

class CardSprite(Image):

    def __init__(self, **kwargs):
        super(CardSprite, self).__init__(allow_stretch=True, **kwargs)
        self.texture.mag_filter = 'linear'
        w = 210.9
        h = 240
        self.size = (params.scale * w, params.scale * h)


class PlayerHandArea(Widget):


    def __init__(self):
        super(PlayerHandArea, self).__init__()
        with self.canvas:
            Color(1,0,0,0.5)
            Rectangle(size=((1152 * params.scale), (240 * params.scale)),
                      pos = ((384 * params.scale), 0))

class DrawCard(Widget):

    def __init__(self):
        super(DrawCard, self).__init__()
        global Draw_Card
        while Draw_Card > 0:
            scatter = Scatter(do_rotation=False, do_scale=False,
                              size_hint=(None,None),
                              size=(210.9 * params.scale, 240 * params.scale))
            self.NextCard = (CardSprite
                (source='Images/'+(Player1Hand.pop(0))+'.png'))
            self.add_widget(scatter)
            scatter.add_widget(self.NextCard)
            Draw_Card += -1           

class Blank(Widget):

    def __init__(self, pos, size):
        super(Blank, self).__init__()
        with self.canvas:
            Color(0, 0, 0)
            Rectangle(pos=pos, size=size)
            Color(1, 1, 1)

class Game(Widget):

    def __init__(self):
        super(Game, self).__init__()
        self.background = (Sprite
                (source='Images/Background.jpg'))
        self.size = self.background.size
        self.add_widget(self.background)
        self.add_widget(PlayerHandArea())
        global Draw_Card
        Draw_Card += 5
        self.add_widget(DrawCard())
        self.add_widget(Blank(*params.blank_rect))

class GameApp(App):

    def build(self):
        params.init()
        top = Widget()
        top.add_widget(Game())
        return top

class params(object):

    def init(self):
        self.bg_width, self.bg_height = 1920, 1080
        self.width, self.height = Window.size
        self.center = Window.center
        ws = float(self.width) / self.bg_width
        hs = float(self.height) / self.bg_height
        self.scale = min(ws, hs)
        Logger.info('size=%r; dpi=%r; density=%r; SCALE=%r',
            Window.size, Metrics.dpi, Metrics.density, self.scale)
        if ws > hs:
            gap = self.width - (self.bg_width * hs)
            self.blank_rect = ((self.width - gap, 0), (gap, self.height))
        else:
            gap = self.height - (self.bg_height * ws)
            self.blank_rect = ((0, self.height - gap), (self.width, gap))
params = params()


if __name__ == '__main__':
    GameApp().run()

因此，我使用 Richard Jones 示例根据使用它的用户的屏幕大小来设置图像的大小。这在 1920 到 1080 运行时非常有效，但是当我将 Window.size 切换为 720p 时，缩小后的图像中有很多噪音，看起来很糟糕。Ivied 尝试对 mag_filter 使用线性和最近，并将卡的大小设置为 dp(210.9) 和 dp(240) 但它们的结果相同。有谁知道使用不同分辨率或解释如何使其工作的文档的 kivy 缩小比例的更好方法？原始图像尺寸为 746 x 1037。

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