@tensorflow/tfjs-core
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Hardware-accelerated JavaScript library for machine intelligence
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TypeScript
/**
* @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.
* =============================================================================
*/
import { DataId, Tensor } from '../../tensor';
import { BackendValues, DataType } from '../../types';
export declare enum PackingScheme {
/**
* All values in a single texel are densely packed without any constraints.
*
* This is how the shader encodes a tensor with shape = [2, 3, 4]
* (indices are [batch, row, col]).
*
* 000|001 010|011 020|021
* ------- ------- -------
* 002|003 012|013 022|023
*
* 100|101 110|111 120|121
* ------- ------- -------
* 102|103 112|113 122|123
*
*/
DENSE = 0,
/**
* Single texels contain only values from the same batch, and from adjacent
* rows and columns.
*
* This is how the shader encodes a tensor with shape = [2, 3, 5]
* (indices are [batch, row, col]).
*
* 000|001 002|003 004|xxx 020|021 022|023 024|xxx
* ------- ------- ------- ------- ------- -------
* 010|011 012|013 014|xxx xxx|xxx xxx|xxx xxx|xxx
*
* 100|101 102|103 104|xxx 120|121 122|123 124|xxx
* ------- ------- ------- ------- ------- -------
* 110|111 112|113 114|xxx xxx|xxx xxx|xxx xxx|xxx
*
*/
SHARED_BATCH = 1
}
export declare enum TextureUsage {
RENDER = 0,
UPLOAD = 1,
PIXELS = 2,
DOWNLOAD = 3
}
export declare enum PhysicalTextureType {
UNPACKED_FLOAT16 = 0,
UNPACKED_FLOAT32 = 1,
PACKED_4X1_UNSIGNED_BYTE = 2,
PACKED_2X2_FLOAT32 = 3,
PACKED_2X2_FLOAT16 = 4
}
export interface TextureData {
shape: number[];
dtype: DataType;
values?: BackendValues;
texture?: WebGLTexture;
complexTensors?: {
real: Tensor;
imag: Tensor;
};
/** [rows, columns] shape of the texture. */
texShape?: [number, number];
usage?: TextureUsage;
isPacked?: boolean;
slice?: {
flatOffset: number;
origDataId: DataId;
};
}
export declare function getUnpackedMatrixTextureShapeWidthHeight(rows: number, columns: number): [number, number];
export declare function getUnpackedArraySizeFromMatrixSize(matrixSize: number, channelsPerTexture: number): number;
export declare function getColorMatrixTextureShapeWidthHeight(rows: number, columns: number): [number, number];
/**
* Get shape for densely packed RGBA texture.
*/
export declare function getDenseTexShape(shape: number[]): [number, number];
export declare function getMatrixSizeFromUnpackedArraySize(unpackedSize: number, channelsPerTexture: number): number;
export declare function decodeMatrixFromUnpackedColorRGBAArray(unpackedArray: Float32Array, matrix: Float32Array, channels: number): void;
export declare function getPackedMatrixTextureShapeWidthHeight(rows: number, columns: number): [number, number];
export declare function getPackedRGBAArraySizeFromMatrixShape(rows: number, columns: number): number;
export interface TextureConfig {
internalFormatFloat: number;
textureFormatFloat: number;
internalFormatPackedHalfFloat: number;
internalFormatHalfFloat: number;
internalFormatPackedFloat: number;
downloadTextureFormat: number;
downloadUnpackNumChannels: number;
defaultNumChannels: number;
textureTypeHalfFloat: number;
textureTypeFloat: number;
}
export declare function getTextureConfig(gl: WebGLRenderingContext, textureHalfFloatExtension?: any): TextureConfig;