@tensorflow/tfjs-core
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Hardware-accelerated JavaScript library for machine intelligence
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JavaScript
;
/**
* @license
* Copyright 2017 Google Inc. All Rights Reserved.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* =============================================================================
*/
Object.defineProperty(exports, "__esModule", { value: true });
var environment_1 = require("../../environment");
var util = require("../../util");
var TextureUsage;
(function (TextureUsage) {
TextureUsage[TextureUsage["RENDER"] = 0] = "RENDER";
TextureUsage[TextureUsage["UPLOAD"] = 1] = "UPLOAD";
TextureUsage[TextureUsage["PIXELS"] = 2] = "PIXELS";
TextureUsage[TextureUsage["DOWNLOAD"] = 3] = "DOWNLOAD";
})(TextureUsage = exports.TextureUsage || (exports.TextureUsage = {}));
var PhysicalTextureType;
(function (PhysicalTextureType) {
PhysicalTextureType[PhysicalTextureType["UNPACKED_FLOAT16"] = 0] = "UNPACKED_FLOAT16";
PhysicalTextureType[PhysicalTextureType["UNPACKED_FLOAT32"] = 1] = "UNPACKED_FLOAT32";
PhysicalTextureType[PhysicalTextureType["PACKED_4X1_UNSIGNED_BYTE"] = 2] = "PACKED_4X1_UNSIGNED_BYTE";
PhysicalTextureType[PhysicalTextureType["PACKED_2X2_FLOAT32"] = 3] = "PACKED_2X2_FLOAT32";
PhysicalTextureType[PhysicalTextureType["PACKED_2X2_FLOAT16"] = 4] = "PACKED_2X2_FLOAT16";
})(PhysicalTextureType = exports.PhysicalTextureType || (exports.PhysicalTextureType = {}));
function getUnpackedMatrixTextureShapeWidthHeight(rows, columns) {
return [columns, rows];
}
exports.getUnpackedMatrixTextureShapeWidthHeight = getUnpackedMatrixTextureShapeWidthHeight;
function getUnpackedArraySizeFromMatrixSize(matrixSize, channelsPerTexture) {
return matrixSize * channelsPerTexture;
}
exports.getUnpackedArraySizeFromMatrixSize = getUnpackedArraySizeFromMatrixSize;
function getColorMatrixTextureShapeWidthHeight(rows, columns) {
return [columns * 4, rows];
}
exports.getColorMatrixTextureShapeWidthHeight = getColorMatrixTextureShapeWidthHeight;
/**
* Get shape for densely packed RGBA texture.
*/
function getDenseTexShape(shape) {
var size = util.sizeFromShape(shape);
var texelsNeeded = Math.ceil(size / 4);
return util.sizeToSquarishShape(texelsNeeded);
}
exports.getDenseTexShape = getDenseTexShape;
function getMatrixSizeFromUnpackedArraySize(unpackedSize, channelsPerTexture) {
if (unpackedSize % channelsPerTexture !== 0) {
throw new Error("unpackedSize (" + unpackedSize + ") must be a multiple of " +
("" + channelsPerTexture));
}
return unpackedSize / channelsPerTexture;
}
exports.getMatrixSizeFromUnpackedArraySize = getMatrixSizeFromUnpackedArraySize;
function decodeMatrixFromUnpackedColorRGBAArray(unpackedArray, matrix, channels) {
var requiredSize = unpackedArray.length * channels / 4;
if (matrix.length < requiredSize) {
throw new Error("matrix length (" + matrix.length + ") must be >= " + requiredSize);
}
var dst = 0;
for (var src = 0; src < unpackedArray.length; src += 4) {
for (var c = 0; c < channels; c++) {
matrix[dst++] = unpackedArray[src + c];
}
}
}
exports.decodeMatrixFromUnpackedColorRGBAArray = decodeMatrixFromUnpackedColorRGBAArray;
function getPackedMatrixTextureShapeWidthHeight(rows, columns) {
return [
Math.max(1, Math.ceil(columns / 2)), Math.max(1, Math.ceil(rows / 2))
];
}
exports.getPackedMatrixTextureShapeWidthHeight = getPackedMatrixTextureShapeWidthHeight;
function getPackedRGBAArraySizeFromMatrixShape(rows, columns) {
var _a = getPackedMatrixTextureShapeWidthHeight(rows, columns), w = _a[0], h = _a[1];
return w * h * 4;
}
exports.getPackedRGBAArraySizeFromMatrixShape = getPackedRGBAArraySizeFromMatrixShape;
function getTextureConfig(
// tslint:disable-next-line:no-any
gl, textureHalfFloatExtension) {
// tslint:disable-next-line:no-any
var glany = gl;
var internalFormatFloat;
var internalFormatHalfFloat;
var internalFormatPackedHalfFloat;
var internalFormatPackedFloat;
var textureFormatFloat;
var downloadTextureFormat;
var downloadUnpackNumChannels;
var defaultNumChannels;
var textureTypeHalfFloat;
var textureTypeFloat;
if (environment_1.ENV.getNumber('WEBGL_VERSION') === 2) {
internalFormatFloat = glany.R32F;
internalFormatHalfFloat = glany.R16F;
internalFormatPackedHalfFloat = glany.RGBA16F;
internalFormatPackedFloat = glany.RGBA32F;
textureFormatFloat = glany.RED;
downloadUnpackNumChannels = 4;
defaultNumChannels = 1;
textureTypeHalfFloat = glany.HALF_FLOAT;
textureTypeFloat = glany.FLOAT;
}
else {
internalFormatFloat = gl.RGBA;
internalFormatHalfFloat = gl.RGBA;
internalFormatPackedHalfFloat = gl.RGBA;
internalFormatPackedFloat = glany.RGBA;
textureFormatFloat = gl.RGBA;
downloadUnpackNumChannels = 4;
defaultNumChannels = 4;
textureTypeHalfFloat = textureHalfFloatExtension != null ?
textureHalfFloatExtension.HALF_FLOAT_OES :
null;
textureTypeFloat = gl.FLOAT;
}
downloadTextureFormat = gl.RGBA;
return {
internalFormatFloat: internalFormatFloat,
internalFormatHalfFloat: internalFormatHalfFloat,
internalFormatPackedHalfFloat: internalFormatPackedHalfFloat,
internalFormatPackedFloat: internalFormatPackedFloat,
textureFormatFloat: textureFormatFloat,
downloadTextureFormat: downloadTextureFormat,
downloadUnpackNumChannels: downloadUnpackNumChannels,
defaultNumChannels: defaultNumChannels,
textureTypeHalfFloat: textureTypeHalfFloat,
textureTypeFloat: textureTypeFloat
};
}
exports.getTextureConfig = getTextureConfig;
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