Using `clip: true` with software renderer does not clip rounded border

[xiaguangbo]

mcu: esp32c2 std-idf rust x86 debian:

esp32c2:

[package]
name = "esp32c2"
version = "0.1.0"
authors = ["xiaguangbo"]
edition = "2021"
resolver = "2"
rust-version = "1.71"

[profile.release]
opt-level = "s"

[profile.dev]
debug = true    # Symbols are nice and they don't increase the size on Flash
opt-level = "z"

[features]
default = ["std", "embassy", "esp-idf-svc/native"]

pio = ["esp-idf-svc/pio"]
std = ["alloc", "esp-idf-svc/binstart", "esp-idf-svc/std"]
alloc = ["esp-idf-svc/alloc"]
nightly = ["esp-idf-svc/nightly"]
experimental = ["esp-idf-svc/experimental"]
embassy = [
    "esp-idf-svc/embassy-sync",
    "esp-idf-svc/critical-section",
    "esp-idf-svc/embassy-time-driver",
]

[dependencies]
log = { version = "*", default-features = false }
esp-idf-svc = { version = "*", default-features = false }
num-traits = "*"
chrono = "*"
rand = "*"

slint = { version = "*", default-features = false, features = ["compat-1-2", "renderer-software", "unsafe-single-threaded"] }

[build-dependencies]
embuild = "*"
slint-build = "*"

struct TileData {
    image: image,
    image_visible: bool,
    solved: bool,
}

component MemoryTile inherits Rectangle {
    in property <bool> open_curtain;
    in property <bool> solved;
    in property <image> icon;
    callback clicked;

    height: 50px;
    width: 50px;
    border-radius: self.width / 2;
    background: solved ? #34CE57 : #3960D5;
    clip: true;

    animate background { duration: 800ms; }

    Image {
        source: icon;
        width: parent.width;
        height: parent.height;
    }

    // Left curtain
    Rectangle {
        background: #193076;
        x: 0px;
        width: open_curtain ? 0px : (parent.width / 2);
        height: parent.height;
        clip: true;

        animate width {
            duration: 250ms;
            easing: ease-in;
        }

        Image {
            width: root.width - 25px;
            height: root.height - 25px;
            x: 13px;
            y: 13px;
            source: @image-url("../icons/tile_logo.png");
        }
    }

    // Right curtain
    Rectangle {
        background: #193076;
        x: open_curtain ? parent.width : (parent.width / 2);
        width: open_curtain ? 0px : (parent.width / 2);
        height: parent.height;
        clip: true;

        animate width {
            duration: 250ms;
            easing: ease-in;
        }
        animate x {
            duration: 250ms;
            easing: ease-in;
        }

        Image {
            width: root.width - 25px;
            height: root.height - 25px;
            x: parent.width - self.width - 13px;
            y: 13px;
            source: @image-url("../icons/tile_logo.png");
        }
    }

    TouchArea {
        clicked => {
            // Delegate to the user of this element
            root.clicked();
        }

        width: 100%;
        height: 100%;
    }
}

export component AppWindow inherits Window {
    width: 240px;
    height: 320px;

    callback check_if_pair_solved();
    // Added
    in property <bool> disable_tiles;
    // Added

    in-out property <[TileData]> memory_tiles: [
        { image: @image-url("../icons/at.png") },
        { image: @image-url("../icons/balance-scale.png") },
        { image: @image-url("../icons/bicycle.png") },
        { image: @image-url("../icons/bus.png") },
        { image: @image-url("../icons/cloud.png") },
        { image: @image-url("../icons/cogs.png") },
        { image: @image-url("../icons/motorcycle.png") },
        { image: @image-url("../icons/video.png") },
    ];

    for tile[i] in memory_tiles: MemoryTile {
        x: mod(i, 4) * (root.width / 4);
        y: floor(i / 4) * (root.width / 4);
        width: 50px;
        height: 50px;
        icon: tile.image;
        open_curtain: tile.image_visible || tile.solved; // 任何一个满足都打开帘子
        // propagate the solved status from the model to the tile
        solved: tile.solved;
        clicked => {
            // old: tile.image_visible = !tile.image_visible;
            // new:
            // 可不可以点击
            if (!root.disable_tiles) {
                tile.image_visible = !tile.image_visible;
                root.check_if_pair_solved();
            }
        }
    }
}