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2025-06-12 7b72ac13a83764a662159d4a49b7fffb90476ecb

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/**
 * @license
 * Copyright 2017 Google LLC. 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 { env, util } from '@tensorflow/tfjs-core';
export var PackingScheme;
(function (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
     *
     */
    PackingScheme[PackingScheme["DENSE"] = 0] = "DENSE";
    /**
     * 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
     *
     */
    PackingScheme[PackingScheme["SHARED_BATCH"] = 1] = "SHARED_BATCH";
})(PackingScheme || (PackingScheme = {}));
export 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 || (TextureUsage = {}));
export 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 || (PhysicalTextureType = {}));
export function getUnpackedMatrixTextureShapeWidthHeight(rows, columns) {
    return [columns, rows];
}
export function getUnpackedArraySizeFromMatrixSize(matrixSize, channelsPerTexture) {
    return matrixSize * channelsPerTexture;
}
export function getColorMatrixTextureShapeWidthHeight(rows, columns) {
    return [columns * 4, rows];
}
/**
 * Get shape for densely packed RGBA texture.
 */
export function getDenseTexShape(shape) {
    const size = util.sizeFromShape(shape);
    const texelsNeeded = Math.ceil(size / 4);
    return util.sizeToSquarishShape(texelsNeeded);
}
export function getMatrixSizeFromUnpackedArraySize(unpackedSize, channelsPerTexture) {
    if (unpackedSize % channelsPerTexture !== 0) {
        throw new Error(`unpackedSize (${unpackedSize}) must be a multiple of ` +
            `${channelsPerTexture}`);
    }
    return unpackedSize / channelsPerTexture;
}
export function decodeMatrixFromUnpackedColorRGBAArray(unpackedArray, matrix, channels) {
    const requiredSize = unpackedArray.length * channels / 4;
    if (matrix.length < requiredSize) {
        throw new Error(`matrix length (${matrix.length}) must be >= ${requiredSize}`);
    }
    let dst = 0;
    for (let src = 0; src < unpackedArray.length; src += 4) {
        for (let c = 0; c < channels; c++) {
            matrix[dst++] = unpackedArray[src + c];
        }
    }
}
export function getPackedMatrixTextureShapeWidthHeight(rows, columns) {
    return [
        Math.max(1, Math.ceil(columns / 2)), Math.max(1, Math.ceil(rows / 2))
    ];
}
export function getPackedRGBAArraySizeFromMatrixShape(rows, columns) {
    const [w, h] = getPackedMatrixTextureShapeWidthHeight(rows, columns);
    return w * h * 4;
}
export function getTextureConfig(
// tslint:disable-next-line:no-any
gl, textureHalfFloatExtension) {
    // tslint:disable-next-line:no-any
    const glany = gl;
    let internalFormatFloat;
    let internalFormatHalfFloat;
    let internalFormatPackedHalfFloat;
    let internalFormatPackedFloat;
    let textureFormatFloat;
    let downloadTextureFormat;
    let downloadUnpackNumChannels;
    let defaultNumChannels;
    let textureTypeHalfFloat;
    let textureTypeFloat;
    if (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;
        downloadTextureFormat = glany.RGBA8;
    }
    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,
        internalFormatHalfFloat,
        internalFormatPackedHalfFloat,
        internalFormatPackedFloat,
        textureFormatFloat,
        downloadTextureFormat,
        downloadUnpackNumChannels,
        defaultNumChannels,
        textureTypeHalfFloat,
        textureTypeFloat
    };
}
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All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n * =============================================================================\n */\n\nimport {backend_util, DataId, DataType, env, TensorInfo, util} from '@tensorflow/tfjs-core';\n\nexport enum PackingScheme {\n  /**\n   * All values in a single texel are densely packed without any constraints.\n   *\n   * This is how the shader encodes a tensor with shape = [2, 3, 4]\n   * (indices are [batch, row, col]).\n   *\n   * 000|001   010|011   020|021\n   * -------   -------   -------\n   * 002|003   012|013   022|023\n   *\n   * 100|101   110|111   120|121\n   * -------   -------   -------\n   * 102|103   112|113   122|123\n   *\n   */\n  DENSE,\n\n  /**\n   * Single texels contain only values from the same batch, and from adjacent\n   * rows and columns.\n   *\n   * This is how the shader encodes a tensor with shape = [2, 3, 5]\n   * (indices are [batch, row, col]).\n   *\n   * 000|001   002|003   004|xxx   020|021   022|023   024|xxx\n   * -------   -------   -------   -------   -------   -------\n   * 010|011   012|013   014|xxx   xxx|xxx   xxx|xxx   xxx|xxx\n   *\n   * 100|101   102|103   104|xxx   120|121   122|123   124|xxx\n   * -------   -------   -------   -------   -------   -------\n   * 110|111   112|113   114|xxx   xxx|xxx   xxx|xxx   xxx|xxx\n   *\n   */\n  SHARED_BATCH\n}\n\nexport enum TextureUsage {\n  RENDER,\n  UPLOAD,\n  PIXELS,\n  DOWNLOAD\n}\n\nexport enum PhysicalTextureType {\n  UNPACKED_FLOAT16,\n  UNPACKED_FLOAT32,\n  PACKED_4X1_UNSIGNED_BYTE,\n  PACKED_2X2_FLOAT32,\n  PACKED_2X2_FLOAT16\n}\n\nexport interface Texture {\n  texture: WebGLTexture;\n  texShape: [number, number];\n}\nexport interface TextureData {\n  // Required.\n  shape: number[];\n  dtype: DataType;\n\n  // Optional.\n  values?: backend_util.BackendValues;\n  texture?: Texture;\n  // For complex numbers, the real and imaginary parts are stored as their own\n  // individual tensorInfos, with a parent joining the two with the\n  // complexTensors field. When this is defined, texture will be null.\n  complexTensorInfos?: {real: TensorInfo, imag: TensorInfo};\n  /** [rows, columns] shape of the texture. */\n  texShape?: [number, number];\n  usage?: TextureUsage;\n  isPacked?: boolean;\n\n  refCount: number;\n\n  // Available when the tensor has been sliced.\n  slice?: {\n    // Offset in the 'flat index' space.\n    flatOffset: number;\n    // Used for counting how many sliced tensors point to the same texture.\n    origDataId: DataId;\n  };\n}\n\nexport function getUnpackedMatrixTextureShapeWidthHeight(\n    rows: number, columns: number): [number, number] {\n  return [columns, rows];\n}\n\nexport function getUnpackedArraySizeFromMatrixSize(\n    matrixSize: number, channelsPerTexture: number): number {\n  return matrixSize * channelsPerTexture;\n}\n\nexport function getColorMatrixTextureShapeWidthHeight(\n    rows: number, columns: number): [number, number] {\n  return [columns * 4, rows];\n}\n\n/**\n * Get shape for densely packed RGBA texture.\n */\nexport function getDenseTexShape(shape: number[]): [number, number] {\n  const size = util.sizeFromShape(shape);\n  const texelsNeeded = Math.ceil(size / 4);\n  return util.sizeToSquarishShape(texelsNeeded);\n}\n\nexport function getMatrixSizeFromUnpackedArraySize(\n    unpackedSize: number, channelsPerTexture: number): number {\n  if (unpackedSize % channelsPerTexture !== 0) {\n    throw new Error(\n        `unpackedSize (${unpackedSize}) must be a multiple of ` +\n        `${channelsPerTexture}`);\n  }\n  return unpackedSize / channelsPerTexture;\n}\n\nexport function decodeMatrixFromUnpackedColorRGBAArray(\n    unpackedArray: Float32Array, matrix: Float32Array, channels: number) {\n  const requiredSize = unpackedArray.length * channels / 4;\n  if (matrix.length < requiredSize) {\n    throw new Error(\n        `matrix length (${matrix.length}) must be >= ${requiredSize}`);\n  }\n  let dst = 0;\n  for (let src = 0; src < unpackedArray.length; src += 4) {\n    for (let c = 0; c < channels; c++) {\n      matrix[dst++] = unpackedArray[src + c];\n    }\n  }\n}\n\nexport function getPackedMatrixTextureShapeWidthHeight(\n    rows: number, columns: number): [number, number] {\n  return [\n    Math.max(1, Math.ceil(columns / 2)), Math.max(1, Math.ceil(rows / 2))\n  ];\n}\n\nexport function getPackedRGBAArraySizeFromMatrixShape(\n    rows: number, columns: number): number {\n  const [w, h] = getPackedMatrixTextureShapeWidthHeight(rows, columns);\n  return w * h * 4;\n}\n\nexport interface TextureConfig {\n  internalFormatFloat: number;\n  textureFormatFloat: number;\n  internalFormatPackedHalfFloat: number;\n  internalFormatHalfFloat: number;\n  internalFormatPackedFloat: number;\n\n  // The format to use during a gl.readPixels call.\n  downloadTextureFormat: number;\n  // How many channels need to be unpacked after a gl.readPixels call.\n  downloadUnpackNumChannels: number;\n\n  defaultNumChannels: number;\n  textureTypeHalfFloat: number;\n  textureTypeFloat: number;\n}\n\nexport function getTextureConfig(\n    // tslint:disable-next-line:no-any\n    gl: WebGLRenderingContext, textureHalfFloatExtension?: any): TextureConfig {\n  // tslint:disable-next-line:no-any\n  const glany = gl as any;\n\n  let internalFormatFloat: number;\n  let internalFormatHalfFloat: number;\n  let internalFormatPackedHalfFloat: number;\n  let internalFormatPackedFloat: number;\n  let textureFormatFloat: number;\n\n  let downloadTextureFormat: number;\n  let downloadUnpackNumChannels: number;\n\n  let defaultNumChannels: number;\n  let textureTypeHalfFloat: number;\n  let textureTypeFloat: number;\n\n  if (env().getNumber('WEBGL_VERSION') === 2) {\n    internalFormatFloat = glany.R32F;\n    internalFormatHalfFloat = glany.R16F;\n    internalFormatPackedHalfFloat = glany.RGBA16F;\n    internalFormatPackedFloat = glany.RGBA32F;\n    textureFormatFloat = glany.RED;\n    downloadUnpackNumChannels = 4;\n    defaultNumChannels = 1;\n    textureTypeHalfFloat = glany.HALF_FLOAT;\n    textureTypeFloat = glany.FLOAT;\n    downloadTextureFormat = glany.RGBA8;\n  } else {\n    internalFormatFloat = gl.RGBA;\n    internalFormatHalfFloat = gl.RGBA;\n    internalFormatPackedHalfFloat = gl.RGBA;\n    internalFormatPackedFloat = glany.RGBA;\n    textureFormatFloat = gl.RGBA;\n    downloadUnpackNumChannels = 4;\n    defaultNumChannels = 4;\n    textureTypeHalfFloat = textureHalfFloatExtension != null ?\n        textureHalfFloatExtension.HALF_FLOAT_OES :\n        null;\n    textureTypeFloat = gl.FLOAT;\n    downloadTextureFormat = gl.RGBA;\n  }\n\n  return {\n    internalFormatFloat,\n    internalFormatHalfFloat,\n    internalFormatPackedHalfFloat,\n    internalFormatPackedFloat,\n    textureFormatFloat,\n    downloadTextureFormat,\n    downloadUnpackNumChannels,\n    defaultNumChannels,\n    textureTypeHalfFloat,\n    textureTypeFloat\n  };\n}\n"]}