qt - 使用 Qt Quick 缩放像素艺术

Question

我有一个使用像素艺术的 Qt Quick 游戏。例如:

import QtQuick 2.2
import QtQuick.Controls 1.1

ApplicationWindow {
    id: window
    visible: true
    width: 300
    height: 300
    title: qsTr("PixelArt")

    Image {
        source: "http://upload.wikimedia.org/wikipedia/commons/f/f0/Pixelart-tv-iso.png"
        anchors.centerIn: parent
    }
}

我想缩放艺术，所以我增加了尺寸:

import QtQuick 2.2
import QtQuick.Controls 1.1

ApplicationWindow {
    id: window
    visible: true
    width: 300
    height: 300
    title: qsTr("PixelArt")

    Image {
        source: "http://upload.wikimedia.org/wikipedia/commons/f/f0/Pixelart-tv-iso.png"
        anchors.centerIn: parent
        width: 256
        height: 256
    }
}

图像变得模糊。如何在保持其“清晰度”的同时缩放图像，使其看起来像这样:

Answer 1

缩放时图像模糊，因为 smooth 属性默认为 true。

Primarily used in image based items to decide if the item should use smooth sampling or not. Smooth sampling is performed using linear interpolation, while non-smooth is performed using nearest neighbor.

将其设置为 false 以阻止这种情况发生:

import QtQuick 2.2
import QtQuick.Controls 1.1

ApplicationWindow {
    id: window
    visible: true
    width: 300
    height: 300
    title: qsTr("PixelArt")

    Image {
        source: "http://upload.wikimedia.org/wikipedia/commons/f/f0/Pixelart-tv-iso.png"
        anchors.centerIn: parent
        width: 256
        height: 256
        smooth: false
    }
}

有关缩放的更多信息，请参阅:

http://en.wikipedia.org/wiki/Image_scaling