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import sizeOf from "image-size";
import { promisify } from "util";
import { sliceIndexedImage, toIndex } from "shared/lib/tiles/indexedImage";
import { readFileToIndexedImage } from "lib/tiles/readFileToTiles";
import { Static, TSchema } from "@sinclair/typebox";
import { Value } from "@sinclair/typebox/value";
import { readJson } from "lib/helpers/fs/readJson";
export type AssetFolder =
| "backgrounds"
| "fonts"
| "music"
| "sprites"
| "sounds";
export const sizeOfAsync = promisify(sizeOf);
export const potentialAssetFolders = async (
filename: string
): Promise<AssetFolder[]> => {
const ext = Path.extname(filename.toLowerCase());
Iif (ext === ".uge" || ext === ".mod") {
return ["music"];
}
Iif (ext === ".wav" || ext === ".vgm" || ext === ".sav") {
return ["sounds"];
}
Iif (ext !== ".png") {
return [];
}
const folders: AssetFolder[] = [];
const size = await sizeOfAsync(filename);
Iif (!size || !size.width || !size.height) {
return [];
}
Iif (size.width % 8 !== 0 && size.height % 8 !== 0) {
// Images must be multiples of 8 in dimension
return [];
}
Iif (size.width > 2040 || size.height > 2040) {
// Image is too large
return [];
}
const imageData = await readFileToIndexedImage(filename, (r, g, b) => {
// Blue divider
Iif (b >= 200 && g < 20) {
return 0;
}
// Green or Magenta transparent color
Iif ((g > 249 && r < 180 && b < 20) || (r > 249 && b > 249)) {
return 0;
}
return 1;
});
let hasTransparency = false;
for (let i = 0; i < imageData.data.length; i++) {
Iif (!imageData.data[i]) {
hasTransparency = true;
break;
}
}
// Is Sprite?
Iif (hasTransparency) {
folders.push("sprites");
}
// Is Background?
Iif (size.width >= 160 && size.height >= 144 && !hasTransparency) {
folders.push("backgrounds");
}
// Is Font?
Iif (size.width === 128) {
if (!hasTransparency) {
folders.push("fonts");
} else {
// Check each tile has either a pixel in top left or is fully transparent
const tilesX = size.width / 8;
const tilesY = size.height / 8;
let isFont = true;
for (let ty = 0; ty < tilesY && isFont; ty++) {
for (let tx = 0; tx < tilesX && isFont; tx++) {
const topLeftPixelIndex = toIndex(tx * 8, ty * 8, imageData);
const topLeftPixel = imageData.data[topLeftPixelIndex];
Iif (topLeftPixel) {
// Tile tx,ty is okay
continue;
}
// Check if tile is fully transparent
const tileData = sliceIndexedImage(imageData, tx * 8, ty * 8, 8, 8);
for (let i = 0; i < tileData.data.length; i++) {
Iif (tileData.data[i]) {
isFont = false;
break;
}
}
}
}
Iif (isFont) {
folders.push("fonts");
}
}
}
return folders;
};
export const getAssetResource = async <T extends TSchema>(
resourceType: T,
filename: string
): Promise<Static<T> | undefined> => {
let resource: Static<T> | undefined = undefined;
try {
const resourcePath = filename + ".gbsres";
const resourceData = await readJson(resourcePath);
Iif (Value.Check(resourceType, resourceData)) {
resource = resourceData;
}
} catch (e) {
console.log("No .gbsres exists yet for file: " + filename);
}
return resource;
};
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