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wallpaper: support different fill modes

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bbedward
2025-10-19 12:49:57 -04:00
parent e1c180a13f
commit 64960e4dcd
17 changed files with 368 additions and 207 deletions
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80
Shaders/frag/wp_disc.frag
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@@ -16,67 +16,69 @@ layout(std140, binding = 0) uniform buf {
float smoothness; // Edge smoothness (0.0 to 1.0, 0=sharp, 1=very smooth)
float aspectRatio; // Width / Height of the screen
// Fill mode parameters
float fillMode; // 0=no(center), 1=crop(fill), 2=fit(contain), 3=stretch
float imageWidth1; // Width of source1 image
float imageHeight1; // Height of source1 image
float imageWidth2; // Width of source2 image
float imageHeight2; // Height of source2 image
float screenWidth; // Screen width
float screenHeight; // Screen height
vec4 fillColor; // Fill color for empty areas (default: black)
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;
// Calculate UV coordinates based on fill mode
vec2 calculateUV(vec2 uv, float imgWidth, float imgHeight) {
float imageAspect = imgWidth / imgHeight;
float screenAspect = ubuf.screenWidth / ubuf.screenHeight;
vec2 transformedUV = uv;
if (ubuf.fillMode < 0.5) {
// Mode 0: no (center) - No resize, center image at original size
// Convert UV to pixel coordinates, offset, then back to UV in image space
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);
}
transformedUV = uv;
}
else if (ubuf.fillMode < 1.5) {
// Mode 1: crop (fill/cover) - Fill screen, crop excess (default)
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 < 2.5) {
// Mode 2: fit (contain) - Fit inside screen, maintain aspect ratio
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;
// Convert screen UV to pixel coordinates
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);
// Adjust for offset and scale
vec2 imagePixel = (screenPixel - offset) / scale;
// Convert back to UV coordinates in image space
vec2 imageOffset = (vec2(ubuf.screenWidth, ubuf.screenHeight) - vec2(imgWidth, imgHeight)) * 0.5;
vec2 imagePixel = screenPixel - imageOffset;
transformedUV = imagePixel / vec2(imgWidth, imgHeight);
}
// Mode 3: stretch - Use original UV (stretches to fit)
// No transformation needed for stretch mode
return transformedUV;
}
// Sample texture with fill mode and handle out-of-bounds
vec4 sampleWithFillMode(sampler2D tex, vec2 uv, float imgWidth, float imgHeight) {
vec2 transformedUV = calculateUV(uv, imgWidth, imgHeight);
// Check if UV is out of bounds
if (transformedUV.x < 0.0 || transformedUV.x > 1.0 ||
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);
}