html - 制作像素化的边界半径

Question

我有一个游戏看起来有点像 1980 年的游戏。我有这个对话框:

#firstPageText {
            width: 300px;
            min-height: 100px;
            border: 2px solid;
            padding: 1em;
            margin: 0;
            position: absolute;
            bottom: 50px;
            left: 50%;
            -ms-transform: translate(-50%, 0%);
            transform: translate(-50%, 0%);
            font-family: 'Press Start 2P', cursive;
            border-radius: 5px;
        }

<link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap" rel="stylesheet">

<p id="firstPageText">
  This is a test text.
</p>

我想在这个对话框中添加一个边界半径，就像 pokemon 中的那些:

有没有办法实现这种像素化的边界半径，而不是圆形的边界半径？

Answer 1

我会考虑多重背景:

#firstPageText {
  --b:5px;  /* the thickness */
  --c:#000; /* the color */
  width: 300px;
  min-height: 100px;
  font-family: 'Press Start 2P', cursive;
  padding:calc(5*var(--b));
  position:relative;
}
  
#firstPageText::before,
#firstPageText::after { 
  content:"";
  position:absolute;
  inset:0 0 50% 0;
  background:
    linear-gradient(var(--c) 0 0) 50%   0  /calc(100% - 4*var(--b)) var(--b),
    linear-gradient(var(--c) 0 0) 0%   100%/var(--b) calc(100% - 2*var(--b)),
    linear-gradient(var(--c) 0 0) 100% 100%/var(--b) calc(100% - 2*var(--b)),
    conic-gradient(from  90deg,var(--c) 90deg,#0000 0) 0    0/calc(2*var(--b)) calc(2*var(--b)),
    conic-gradient(from 180deg,var(--c) 90deg,#0000 0) 100% 0/calc(2*var(--b)) calc(2*var(--b));
  background-repeat:no-repeat;
}
#firstPageText::after {
  transform-origin:bottom;
  transform:scaleY(-1);
}

<p id="firstPageText">
  This is a test text.
</p>

应用不同的颜色来理解拼图:

#firstPageText {
  --b:10px; /* adjust this */
  width: 300px;
  min-height: 100px;
  font-family: 'Press Start 2P', cursive;
  padding:calc(5*var(--b));
  position:relative;
}
  
#firstPageText::before,
#firstPageText::after { 
  content:"";
  position:absolute;
  inset:0 0 50% 0;
  background:
    linear-gradient(red 0 0) 50%   0  /calc(100% - 4*var(--b)) var(--b),
    linear-gradient(blue 0 0) 0%   100%/var(--b) calc(100% - 2*var(--b)),
    linear-gradient(green 0 0) 100% 100%/var(--b) calc(100% - 2*var(--b)),
    conic-gradient(from  90deg,orange 90deg,lightblue 0) 0    0/calc(2*var(--b)) calc(2*var(--b)),
    conic-gradient(from 180deg,purple 90deg,lightblue 0) 100% 0/calc(2*var(--b)) calc(2*var(--b));
  background-repeat:no-repeat;
}
#firstPageText::after {
  transform-origin:bottom;
  transform:scaleY(-1);
  filter:hue-rotate(180deg);
}

<p id="firstPageText">
  This is a test text.
</p>