46 lines
1.8 KiB
Plaintext
46 lines
1.8 KiB
Plaintext
/*
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* Copyright (C) 2024 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the 'License');
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an 'AS IS' BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { GPUImageSketchFilter } from '@ohos/gpu_transform';
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import { PixelMapTransformation } from './PixelMapTransformation';
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import { image } from '@kit.ImageKit';
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/**
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* 图片变换:素描效果
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*/
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@Sendable
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export class SketchTransformation extends PixelMapTransformation {
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constructor() {
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super();
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}
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async transform(context: Context, toTransform: PixelMap, width: number, height: number): Promise<PixelMap> {
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let imageInfo: image.ImageInfo = await toTransform.getImageInfo();
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if (!imageInfo.size) {
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console.error("SketchTransformation The image size does not exist.");
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return toTransform;
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}
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return await this.sketchGPU(toTransform, imageInfo.size.width, imageInfo.size.height);
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}
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private async sketchGPU(bitmap: PixelMap, targetWidth: number, targetHeight: number): Promise<PixelMap> {
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let bufferData = new ArrayBuffer(bitmap.getPixelBytesNumber());
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await bitmap.readPixelsToBuffer(bufferData);
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let filter = new GPUImageSketchFilter();
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filter.setImageData(bufferData, targetWidth, targetHeight);
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let buf = await filter.getPixelMapBuf(0, 0, targetWidth, targetHeight);
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bitmap.writeBufferToPixels(buf);
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return bitmap;
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}
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} |