"use strict";
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/**
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* @license
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* Copyright 2017 Google Inc. 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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Object.defineProperty(exports, "__esModule", { value: true });
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var shader_compiler_1 = require("./shader_compiler");
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var SliceProgram = /** @class */ (function () {
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function SliceProgram(destSize) {
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this.variableNames = ['source'];
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this.outputShape = destSize;
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this.rank = destSize.length;
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var dtype = shader_compiler_1.getCoordsDataType(this.rank);
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var uniformPart = "uniform int start[" + this.rank + "];";
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var sourceCoords = getCoords(this.rank);
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var body;
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var coordSum = destSize.map(function (_, i) {
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return "sourceLoc." + coords[i] + " = start[" + i + "] + coords." + coords[i] + ";";
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});
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body = "\n " + dtype + " sourceLoc;\n " + dtype + " coords = getOutputCoords();\n " + coordSum.join('\n') + "\n ";
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this.userCode = "\n " + uniformPart + "\n void main() {\n " + body + "\n setOutput(getSource(" + sourceCoords + "));\n }\n ";
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}
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SliceProgram.prototype.getCustomSetupFunc = function (start) {
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var _this = this;
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if (start.length !== this.rank) {
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throw Error("The rank (" + this.rank + ") of the program must match the " +
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("length of start (" + start.length + ")"));
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}
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return function (gpgpu, webGLProgram) {
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if (_this.startLoc == null) {
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_this.startLoc = gpgpu.getUniformLocationNoThrow(webGLProgram, 'start');
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if (_this.startLoc == null) {
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// This means the compiler has optimized and realized it doesn't need
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// the uniform.
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return;
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}
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}
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gpgpu.gl.uniform1iv(_this.startLoc, start);
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};
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};
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return SliceProgram;
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}());
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exports.SliceProgram = SliceProgram;
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var coords = ['x', 'y', 'z', 'w', 'u', 'v'];
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function getCoords(rank) {
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if (rank === 1) {
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return 'sourceLoc';
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}
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else if (rank <= 6) {
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return coords.slice(0, rank).map(function (x) { return 'sourceLoc.' + x; }).join(',');
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}
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else {
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throw Error("Slicing for rank " + rank + " is not yet supported");
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}
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}
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//# sourceMappingURL=slice_gpu.js.map
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