refactor: use crisp rendering for images, minor code style change

src/routes/+layout.svelte

@@ -41,13 +41,7 @@
 
 	const title = getTitle(data.route);
 
-	const svgSquiggles = [
+	const svgSquiggles = [[2], [3], [2], [3], [1]];
-		[2],
-		[3],
-		[2],
-		[3],
-		[1],
-	]
 </script>
 
 <svelte:head>
@@ -71,14 +65,68 @@
     "
 />
 
-<svg xmlns="http://www.w3.org/2000/svg" version="1.1" class="absolute -z-50">
+<svg
+	xmlns="http://www.w3.org/2000/svg"
+	version="1.1"
+	class="absolute -z-50"
+	image-rendering="optimizeSpeed"
+>
 	<defs>
 		{#each svgSquiggles as [scale], index}
-		<filter id="squiggly-{index}">
+			<filter id="squiggly-{index}">
-			<feTurbulence id="turbulence" baseFrequency="0.02" numOctaves="3" result="noise" seed={index} />
+				<feTurbulence
-			<feDisplacementMap in="SourceGraphic" in2="noise" {scale} />
+					id="turbulence"
-		</filter>
+					baseFrequency="0.02"
+					numOctaves="3"
+					result="noise"
+					seed={index}
+				/>
+				<feDisplacementMap in="SourceGraphic" in2="noise" {scale} />
+			</filter>
 		{/each}
+		<filter id="pixelate" color-interpolation-filters="linearRGB" x="0" y="0">
+			<feFlood x="4" y="4" height="2" width="2"/>
+			<feComposite width="10" height="10"/>
+			<feTile result="a"/>
+			<feComposite in="SourceGraphic" in2="a" operator="in"/>
+			<feMorphology operator="dilate" radius="5"/>
+		  </filter>
+		<filter id="dither" color-interpolation-filters="sRGB" x="0" y="0" width="100%" height="100%">
+			<feImage
+				width="4"
+				height="4"
+				xlink:href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAAECAYAAACp8Z5+AAAASElEQVR42gXBgQAAIAxFwW8QwhBCCCGEIYQQQgghhBBCCEMYwutOkphzYmbsvdG9l9YaEYG7o1or5xxKKay1UGYyxuC9R++dD7yGJkTj6F0HAAAAAElFTkSuQmCC"
+			/>
+			<feTile />
+			<feComposite operator="arithmetic" k1="0" k2="1" k3="1" k4="-0.5" in="SourceGraphic" />
+			<feComponentTransfer>
+				<feFuncR type="discrete" tableValues="0 1" />
+				<feFuncG type="discrete" tableValues="0 1" />
+				<feFuncB type="discrete" tableValues="0 1" />
+			</feComponentTransfer>
+		</filter>
+		<filter id="dither-red" color-interpolation-filters="sRGB" x="0" y="0" width="100%" height="100%">
+			<feFlood flood-color="#000000" flood-opacity="0.50" x="0%" y="0%" result="flood" />
+			<feBlend mode="normal" x="0%" y="0%" in="SourceGraphic" in2="flood" result="blend1" />
+			<feImage
+				class="ditherImage"
+				xlink:href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAICAYAAADED76LAAAA5ElEQVQYlQXBgQbCUABA0fdrk0ySSZJJkiRJMjOTTGZmkiRJZiYzyczMzGQmfdrtHPH7/TgcDuR5zna7pWka9vs9aZqyXq8R0+mU5/OJoihcLhfG4zFBENDtdjmdToj3+81yueTz+WCaJnEcM5/PKcsSXdcRsizjeR6j0YjH40Gr1cJxHAaDAbfbDVHXNbvdjiRJWK1WfL9fLMsiyzI2mw1CVVV836fT6XA8HplMJoRhSK/X43w+I6IoYjabURQFmqbxer1YLBZUVYVhGAhJkrBtm36/z/V6pd1u47ouw+GQ+/3OH4/Fn8FvF/NxAAAAAElFTkSuQmCC"
+				x="0"
+				y="0"
+				width="4"
+				height="4"
+				crossOrigin="anonymous"
+				result="image1"
+			/>
+			<feTile x="0" y="0" in="image1" result="tile" />
+			<feBlend mode="overlay" x="0%" y="0%" in="blend1" in2="tile" result="blend2" />
+			<feColorMatrix type="saturate" values="0" />
+			<feComponentTransfer>
+				<feFuncR type="discrete" tableValues="0 0" />
+				<feFuncG type="discrete" tableValues="0 1" />
+				<feFuncB type="discrete" tableValues="0 1" />
+			</feComponentTransfer>
+		</filter>
 	</defs>
 </svg>
 
@@ -101,4 +149,4 @@
 			<NavButton {highlight} {...item} />
 		{/each}
 	</div>
-</nav>
+</nav>

src/styles/app.css

@@ -9,6 +9,8 @@
         @apply font-sans-serif bg-ralsei-black text-ralsei-white;
         @apply prose-code:font-monospace prose-headings:font-monospace;
         cursor: url('/icons/gaze_closed.png'), default;
+        image-rendering: crisp-edges;
+        image-rendering: pixelated;
     }
 
     .prose h1::before {
@@ -109,7 +111,23 @@
         100% {
           filter: url("#squiggly-4");
         }
-      }
+    }
+
+    .pixelate {
+        filter: url("#pixelate");
+    }
+
+    .pixelate-bg {
+        backdrop-filter: url("#pixelate");
+    }
+
+    .dither {
+        filter: url("#dither");
+    }
+
+    .dither-bg {
+        backdrop-filter: url("#dither");
+    }
 }
 
 @layer utilities {