鸿蒙开发可以以颜色创建pixelmap吗？

Question

鸿蒙开发可以以颜色创建pixelmap吗？

Answer 1

https://developer.huawei.com/consumer/cn/doc/harmonyos-refere... 可以使用image.createPixelMap来以颜色创建pixelmapl

import image from '@ohos.multimedia.image'; 
 
@Entry 
@Component 
export struct PixelMapTest { 
  @State pixelMap: PixelMap | undefined = undefined; 
 
  aboutToAppear(): void { 
    const color = new ArrayBuffer(255 * 255 * 4); // 这里与设置颜色的大小有关，等于宽*高*4，宽高在下面的size处设置 
    const colorInfo: Uint8Array = new Uint8Array(color); 
    console.log("colorinfo length:" + colorInfo.length); 
    for (let i = 0; i < colorInfo.length; i += 4) { 
      // b 
      colorInfo[i] = 0; 
      // g 
      colorInfo[i + 1] = 0; 
      // r 
      colorInfo[i + 2] = 255; 
      // a 
      colorInfo[i + 3] = 255; 
    } 
    image.createPixelMap(colorInfo.buffer, { editable: true, pixelFormat: 4, size: { height: 255, width: 255 } }) 
      .then((pixelMap) => { 
        this.pixelMap = pixelMap; 
      }) 
  } 
 
  build() { 
    Column() { 
      Image(this.pixelMap).width(200) 
        .height(200) 
    } 
  } 
}