32 lines
1.8 KiB
JavaScript
32 lines
1.8 KiB
JavaScript
// Renders only inventory thumbnails through the game's own UI icon mapping.
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// Data URLs stay in memory; no game textures are exported to the filesystem.
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async function readItemIcons(items) {
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if (typeof Sprite_ItemIcon === 'undefined') throw new Error('游戏图标组件尚未就绪');
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const bitmaps = new Map();
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for (const item of items) {
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if (!bitmaps.has(item.type)) bitmaps.set(item.type,Sprite_ItemIcon.prototype.itemBitmap(item.type));
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}
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await Promise.all([...new Set(bitmaps.values())].map(bitmap=>new Promise((resolve,reject)=>{
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if (bitmap.isReady()) return resolve();
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if (bitmap.isError?.()) return reject(new Error('物品图标加载失败'));
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const timer=setTimeout(()=>reject(new Error('物品图标加载超时，请重试')),8000);
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bitmap.addLoadListener(()=>{ clearTimeout(timer); resolve(); });
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})));
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const icons = {};
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for (const item of items) {
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const bitmap = bitmaps.get(item.type);
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let frame;
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const proxy = { _type:item.type, bitmap, setFrame(x,y,width,height) { frame={x,y,width,height}; } };
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Sprite_ItemIcon.prototype.refreshIdx.call(proxy,item.id);
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const {x,y,width,height} = frame;
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if (![x,y,width,height].every(Number.isFinite) || width <= 0 || height <= 0 || width > 512 || height > 512 ||
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x < 0 || y < 0 || x+width > bitmap.width || y+height > bitmap.height) throw new Error('物品图标裁切范围无效');
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const canvas=document.createElement('canvas'); canvas.width=width; canvas.height=height;
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const context=canvas.getContext('2d'); context.imageSmoothingEnabled=false;
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context.drawImage(bitmap.canvas,x,y,width,height,0,0,width,height);
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icons[item.type+':'+item.id]=canvas.toDataURL('image/png');
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}
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return {ok:true,icons};
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}
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module.exports = { readItemIcons };
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