/**
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* @license
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* Copyright 2018 Google LLC. All Rights Reserved.
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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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*/
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import {GPGPUContext} from './gpgpu_context';
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import {GPGPUProgram} from './gpgpu_math';
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export class ClipPackedProgram implements GPGPUProgram {
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variableNames = ['A'];
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packedInputs = true;
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packedOutput = true;
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userCode: string;
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outputShape: number[];
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// Caching uniform locations for speed.
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minLoc: WebGLUniformLocation;
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maxLoc: WebGLUniformLocation;
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constructor(aShape: number[]) {
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this.outputShape = aShape;
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this.userCode = `
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uniform float minVal;
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uniform float maxVal;
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void main() {
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vec4 value = getAAtOutCoords();
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if (any(isnan(value))) {
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setOutput(value);
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return;
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}
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setOutput(clamp(value, vec4(minVal), vec4(maxVal)));
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}
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`;
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}
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getCustomSetupFunc(min: number, max: number) {
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return (gpgpu: GPGPUContext, webGLProgram: WebGLProgram) => {
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if (this.minLoc == null) {
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this.minLoc = gpgpu.getUniformLocationNoThrow(webGLProgram, 'minVal');
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this.maxLoc = gpgpu.getUniformLocationNoThrow(webGLProgram, 'maxVal');
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}
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gpgpu.gl.uniform1f(this.minLoc, min);
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gpgpu.gl.uniform1f(this.maxLoc, max);
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};
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}
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}
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