switch hto monorepo structure

quickshell/Shaders/frag/wp_pixelate.frag

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+// ===== wp_pixelate.frag =====
+#version 450
+
+layout(location = 0) in vec2 qt_TexCoord0;
+layout(location = 0) out vec4 fragColor;
+
+layout(binding = 1) uniform sampler2D source1;  // Current wallpaper (underlay)
+layout(binding = 2) uniform sampler2D source2;  // Next wallpaper (pixelated overlay → sharp)
+
+layout(std140, binding = 0) uniform buf {
+    mat4  qt_Matrix;
+    float qt_Opacity;
+    float progress;      // 0..1
+    float centerX;       // (unused, API compat)
+    float centerY;       // (unused)
+    float smoothness;    // controls starting block size (0..1)
+    float aspectRatio;   // (unused)
+
+    float fillMode;      // 0=stretch, 1=fit, 2=crop, 3=tile, 4=tileV, 5=tileH, 6=pad
+    float imageWidth1;
+    float imageHeight1;
+    float imageWidth2;
+    float imageHeight2;
+    float screenWidth;
+    float screenHeight;
+    vec4  fillColor;
+} ubuf;
+
+vec2 calculateUV(vec2 uv, float imgWidth, float imgHeight) {
+    vec2 transformedUV = uv;
+
+    if (ubuf.fillMode < 0.5) {
+        transformedUV = uv;
+    }
+    else if (ubuf.fillMode < 1.5) {
+        float scale = min(ubuf.screenWidth / imgWidth, ubuf.screenHeight / imgHeight);
+        vec2 scaledImageSize = vec2(imgWidth, imgHeight) * scale;
+        vec2 offset = (vec2(ubuf.screenWidth, ubuf.screenHeight) - scaledImageSize) * 0.5;
+        vec2 screenPixel = uv * vec2(ubuf.screenWidth, ubuf.screenHeight);
+        vec2 imagePixel = (screenPixel - offset) / scale;
+        transformedUV = imagePixel / vec2(imgWidth, imgHeight);
+    }
+    else if (ubuf.fillMode < 2.5) {
+        float scale = max(ubuf.screenWidth / imgWidth, ubuf.screenHeight / imgHeight);
+        vec2 scaledImageSize = vec2(imgWidth, imgHeight) * scale;
+        vec2 offset = (scaledImageSize - vec2(ubuf.screenWidth, ubuf.screenHeight)) / scaledImageSize;
+        transformedUV = uv * (vec2(1.0) - offset) + offset * 0.5;
+    }
+    else if (ubuf.fillMode < 3.5) {
+        transformedUV = fract(uv * vec2(ubuf.screenWidth, ubuf.screenHeight) / vec2(imgWidth, imgHeight));
+    }
+    else if (ubuf.fillMode < 4.5) {
+        vec2 tileUV = uv * vec2(ubuf.screenWidth, ubuf.screenHeight) / vec2(imgWidth, imgHeight);
+        transformedUV = vec2(uv.x, fract(tileUV.y));
+    }
+    else if (ubuf.fillMode < 5.5) {
+        vec2 tileUV = uv * vec2(ubuf.screenWidth, ubuf.screenHeight) / vec2(imgWidth, imgHeight);
+        transformedUV = vec2(fract(tileUV.x), uv.y);
+    }
+    else {
+        vec2 screenPixel = uv * vec2(ubuf.screenWidth, ubuf.screenHeight);
+        vec2 imageOffset = (vec2(ubuf.screenWidth, ubuf.screenHeight) - vec2(imgWidth, imgHeight)) * 0.5;
+        vec2 imagePixel = screenPixel - imageOffset;
+        transformedUV = imagePixel / vec2(imgWidth, imgHeight);
+    }
+
+    return transformedUV;
+}
+
+vec4 sampleWithFillMode(sampler2D tex, vec2 uv, float imgWidth, float imgHeight) {
+    vec2 transformedUV = calculateUV(uv, imgWidth, imgHeight);
+
+    if (ubuf.fillMode >= 2.5 && ubuf.fillMode <= 5.5) {
+        return texture(tex, transformedUV);
+    }
+
+    if (transformedUV.x < 0.0 || transformedUV.x > 1.0 ||
+        transformedUV.y < 0.0 || transformedUV.y > 1.0) {
+        return ubuf.fillColor;
+    }
+
+    return texture(tex, transformedUV);
+}
+
+vec2 quantizeUV(vec2 uv, float cellPx) {
+    vec2 screenSize = vec2(max(1.0, ubuf.screenWidth), max(1.0, ubuf.screenHeight));
+    float cell = max(1.0, ceil(cellPx));                  // integer pixel cells
+    vec2 grid = floor(uv * screenSize / cell) * cell + 0.5 * cell;
+    return grid / screenSize;
+}
+
+void main() {
+    vec2 uv = qt_TexCoord0;
+
+    vec4 oldCol = sampleWithFillMode(source1, uv, ubuf.imageWidth1, ubuf.imageHeight1);
+
+    float p = clamp(ubuf.progress, 0.0, 1.0);
+    float pe = p * p * (3.0 - 2.0 * p); // smootherstep for opacity
+
+    // Screen-relative starting cell size:
+    // smoothness=0 → ~10% of min(screen), smoothness=1 → ~80% of min(screen)
+    float s = clamp(ubuf.smoothness, 0.0, 1.0);
+    float minSide = min(max(1.0, ubuf.screenWidth), max(1.0, ubuf.screenHeight));
+    float startPx = mix(minSide * 0.10, minSide * 0.80, s);   // big and obvious even on small screens
+
+    // Cell size shrinks continuously from startPx → 1 as p grows
+    float cellPx = mix(startPx, 1.0, p);
+
+    // Sample next as pixelated overlay
+    vec2 uvq = quantizeUV(uv, cellPx);
+    vec4 newPix = sampleWithFillMode(source2, uvq, ubuf.imageWidth2, ubuf.imageHeight2);
+
+    // As we approach the end, sharpen the next from pixelated → full-res
+    float sharpen = smoothstep(0.75, 1.0, p);              // only near the end
+    vec4 newFull = sampleWithFillMode(source2, uv, ubuf.imageWidth2, ubuf.imageHeight2);
+    vec4 newCol = mix(newPix, newFull, sharpen);
+
+    vec4 outColor = mix(oldCol, newCol, pe);
+
+    // Snaps
+    if (p <= 0.0) outColor = oldCol;
+    if (p >= 1.0) outColor = newFull;
+
+    fragColor = outColor * ubuf.qt_Opacity;
+}