@tarojs/taro-h5/dist/api/canvas/canvasGetImageData.js

Taro h5 framework

import { findDOM } from '../../utils/index.js';
import { MethodHandler } from '../../utils/handler.js';

/**
 * 获取 canvas 区域隐含的像素数据。
 */
const canvasGetImageData = ({ canvasId, success, fail, complete, x, y, width, height }, inst) => {
    const handle = new MethodHandler({ name: 'canvasGetImageData', success, fail, complete });
    try {
        const el = findDOM(inst);
        const canvas = el === null || el === void 0 ? void 0 : el.querySelector(`canvas[canvas-id="${canvasId}"]`);
        const ctx = canvas === null || canvas === void 0 ? void 0 : canvas.getContext('2d');
        if (!ctx)
            throw new Error(`canvas ${canvasId} is not available`);
        const imageData = ctx.getImageData(x, y, width, height);
        return handle.success({
            width: imageData.width,
            height: imageData.height,
            data: imageData.data
        });
    }
    catch (e) {
        return handle.fail({
            errMsg: e.message
        });
    }
};

export { canvasGetImageData };
//# sourceMappingURL=canvasGetImageData.js.map