[js/web] add ConvTranspose2D to WebGL backend (#11990)

* Add ConvTranspose

* Update docs + tests

* fix lint

* fix output shape calculations

* Revert "fix output shape calculations"

This reverts commit 8014fa9.

* fix format

* remove broken output_shape test

js/web/docs/operators.md

@@ -36,7 +36,7 @@ See [Compatibility](../README.md#Compatibility) for a list of the supported plat
 | [ConstantOfShape](https://github.com/onnx/onnx/blob/master/docs/Operators.md#ConstantOfShape) |  |
 | [Conv](https://github.com/onnx/onnx/blob/master/docs/Operators.md#Conv) | [1-10](https://github.com/onnx/onnx/blob/master/docs/Changelog.md#Conv-1), [11+](https://github.com/onnx/onnx/blob/master/docs/Changelog.md#Conv-11) |
 | [ConvInteger](https://github.com/onnx/onnx/blob/master/docs/Operators.md#ConvInteger) |  |
-| [ConvTranspose](https://github.com/onnx/onnx/blob/master/docs/Operators.md#ConvTranspose) |  |
+| [ConvTranspose](https://github.com/onnx/onnx/blob/master/docs/Operators.md#ConvTranspose) | [1-10](https://github.com/onnx/onnx/blob/master/docs/Changelog.md#ConvTranspose-1), [11+](https://github.com/onnx/onnx/blob/master/docs/Changelog.md#ConvTranspose-11) |
 | [Cos](https://github.com/onnx/onnx/blob/master/docs/Operators.md#Cos) | [7+](https://github.com/onnx/onnx/blob/master/docs/Changelog.md#Cos-7) |
 | [Cosh](https://github.com/onnx/onnx/blob/master/docs/Operators.md#Cosh) |  |
 | [CumSum](https://github.com/onnx/onnx/blob/master/docs/Operators.md#CumSum) |  |

js/web/lib/onnxjs/backends/webgl/op-resolve-rules.ts

@@ -8,6 +8,7 @@ import * as binaryOps from './ops/binary-op';
 import {cast, parseCastAttributes} from './ops/cast';
 import {concat, parseConcatAttributes} from './ops/concat';
 import {conv, parseConvAttributes} from './ops/conv';
+import {convTranspose, parseConvTransposeAttributes} from './ops/conv-transpose';
 import {depthToSpace, parseDepthToSpaceAttributes} from './ops/depth-to-space';
 import {flatten, parseFlattenAttributes} from './ops/flatten';
 import {gather, parseGatherAttributes} from './ops/gather';
@@ -48,6 +49,7 @@ export const WEBGL_OP_RESOLVE_RULES: readonly OpSet.ResolveRule[] = [
   ['Clip', '', '11+', unaryOps.clipV11],
   ['Concat', '', '4+', concat, parseConcatAttributes],
   ['Conv', '', '1+', conv, parseConvAttributes],
+  ['ConvTranspose', '', '1+', convTranspose, parseConvTransposeAttributes],
   ['Cos', '', '7+', unaryOps.cos],
   ['Div', '', '7+', binaryOps.div],
   ['Dropout', '', '7+', unaryOps.identity],

js/web/lib/onnxjs/backends/webgl/ops/conv-grouped.ts

@@ -8,7 +8,7 @@ import {WebGLInferenceHandler} from '../inference-handler';
 import {ProgramInfo, ProgramInfoLoader, ProgramMetadata, TextureType} from '../types';
 
 import {calculateOutputShape, ConvAttributes} from './conv';
-import {getActicationSnippet} from './fuse-utils';
+import {getActivationSnippet} from './fuse-utils';
 
 const createUnpackedGroupedConvProgramMetadata = (hasBias: boolean, cacheHint: string): ProgramMetadata => ({
   name: 'GroupedConv',
@@ -33,7 +33,7 @@ const createUnpackedGroupedConvProgramInfo =
       const outputShape =
           calculateOutputShape(xShape, wShape, attributes.dilations, attributes.pads, attributes.strides);
       const glsl = getGlsl(inferenceHandler.session.backend.glContext.version);
-      const {activationFunction, applyActivation} = getActicationSnippet(attributes);
+      const {activationFunction, applyActivation} = getActivationSnippet(attributes);
 
       const shaderSource = `
   const ivec2 strides = ivec2(${attributes.strides[0]}, ${attributes.strides[1]});

js/web/lib/onnxjs/backends/webgl/ops/conv-transpose.ts

@@ -0,0 +1,259 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+import {createAttributeWithCacheKey} from '../../../attribute-with-cache-key';
+import {InferenceHandler} from '../../../backend';
+import {Graph} from '../../../graph';
+import {OperatorImplementation, OperatorInitialization} from '../../../operators';
+import {Tensor} from '../../../tensor';
+import {getGlsl} from '../glsl-source';
+import {WebGLInferenceHandler} from '../inference-handler';
+import {ProgramInfo, ProgramInfoLoader, ProgramMetadata, TextureType} from '../types';
+
+import {ConvAttributes} from './conv';
+import {getActivationSnippet, parseInternalActivationAttributes} from './fuse-utils';
+
+const computeTotalPad =
+    (inDim: number, stride: number, adj: number, kernel: number, dilation: number, outSize: number) =>
+        (inDim - 1) * stride + adj + (kernel - 1) * dilation + 1 - outSize;
+
+const distributePadding = (totalPad: number, autoPad: string, pads: number[], head: number, tail: number) => {
+  const smallPad = Math.floor(totalPad / 2);
+  if (autoPad === 'SAME_UPPER') {
+    pads[head] = smallPad;
+    pads[tail] = totalPad - smallPad;
+  } else if (autoPad === 'SAME_LOWER') {
+    pads[head] = totalPad - smallPad;
+    pads[tail] = smallPad;
+  }
+};
+
+const calculateOutputShapeAndPads =
+    (inputShape: readonly number[], kernelShape: readonly number[], dilations: readonly number[], autoPad: string,
+     pads: number[], strides: readonly number[], outputPadding: readonly number[], outputShape: number[]) => {
+      const spatialRank = inputShape.length - 2;
+      const updateShape = outputShape.length === 0;
+      for (let i = 0; i < spatialRank; ++i) {
+        const outSize = updateShape ? inputShape[i + 2] * strides[i] : outputShape[i];
+        const totalPad = computeTotalPad(inputShape[i + 2], strides[i], pads[i], kernelShape[i], dilations[i], outSize);
+        distributePadding(totalPad, autoPad, pads, i, i + spatialRank);
+        if (updateShape) {
+          outputShape.push(
+              strides[i] * (inputShape[i + 2] - 1) + outputPadding[i] + (kernelShape[i] - 1) * dilations[i] + 1 -
+              pads[i] - pads[i + spatialRank]);
+        }
+      }
+    };
+
+export interface ConvTransposeAttributes extends ConvAttributes {
+  readonly outputPadding: readonly number[];
+  readonly outputShape: readonly number[];
+}
+
+export const convTranspose: OperatorImplementation<ConvTransposeAttributes> =
+    (inferenceHandler: InferenceHandler, inputs: Tensor[], attributes: ConvTransposeAttributes): Tensor[] => {
+      validateInputs(inputs, attributes);  // currently will fail if not convTranspose2D
+      return convTranspose2d(inferenceHandler, inputs, attributes);
+    };
+
+const convTranspose2d: OperatorImplementation<ConvTransposeAttributes> =
+    (inferenceHandler: WebGLInferenceHandler, inputs: Tensor[], attributes: ConvTransposeAttributes): Tensor[] => {
+      const adjustedAttributes = getAdjustedConvTransposeAttributes(attributes, inputs);
+      return [convTranspose2DUnpacked(inferenceHandler, inputs, adjustedAttributes)];
+    };
+
+const createConvTransposeProgramMetadata = (hasBias: boolean, cacheHint: string) => ({
+  name: 'ConvTranspose',
+  inputNames: hasBias ? ['X', 'W', 'B'] : ['X', 'W'],
+  inputTypes: hasBias ? [TextureType.unpacked, TextureType.unpacked, TextureType.unpacked] :
+                        [TextureType.unpacked, TextureType.unpacked],
+  cacheHint
+});
+
+const createUnpackedConvTransposeProgramInfo =
+    (inferenceHandler: WebGLInferenceHandler, inputs: readonly Tensor[], metadata: ProgramMetadata,
+     attributes: ConvTransposeAttributes): ProgramInfo => {
+      const hasBias = inputs.length > 2;
+      const valueInit = hasBias ? 'getB(output_channel)' : '0.0';
+      const xShape = inputs[0].dims;
+      const wShape = inputs[1].dims;
+      const outputChannelsPerGroup = wShape[1];
+      const inputChannelsPerGroup = wShape[0] / attributes.group;
+      const outputShape = [inputs[0].dims[0], inputs[1].dims[1] * attributes.group, ...attributes.outputShape];
+      const glsl = getGlsl(inferenceHandler.session.backend.glContext.version);
+      const {activationFunction, applyActivation} = getActivationSnippet(attributes);
+
+      const shaderSource = `
+  const ivec2 strides = ivec2(${attributes.strides[0]}, ${attributes.strides[1]});
+  const ivec2 pads = ivec2(${attributes.pads[0]}, ${attributes.pads[1]});
+  ${activationFunction}
+  void main() {
+    ivec4 coords = getOutputCoords();
+    int batch = coords.x;
+    int output_channel = coords.y;
+    
+    ivec2 loc = coords.zw + pads;
+
+    int group_id = output_channel / ${outputChannelsPerGroup};
+    int wOutChannel = output_channel - group_id * ${outputChannelsPerGroup};
+
+    float value = ${valueInit};
+    for (int inChannelOffset = 0; inChannelOffset < ${inputChannelsPerGroup}; inChannelOffset++) {
+      int input_channel = group_id * ${inputChannelsPerGroup} + inChannelOffset;
+      for (int wWOff = 0; wWOff < ${wShape[2]}; wWOff++) {
+        for (int wHOff = 0; wHOff < ${wShape[3]}; wHOff++) {
+          ivec2 wOff = ivec2(wWOff * ${attributes.dilations[0]}, wHOff * ${attributes.dilations[1]});
+          ivec2 wLoc = loc - wOff;
+          ivec2 wLocIn = wLoc / strides;
+          if (
+            wLocIn * strides == wLoc &&
+            wLocIn.x >= 0 && wLocIn.x < ${xShape[2]} &&
+            wLocIn.y >= 0 && wLocIn.y < ${xShape[3]}
+          ) {
+            float xVal = getX(batch, input_channel, wLocIn.y, wLocIn.x);
+            float wVal = getW(input_channel, wOutChannel, wHOff, wWOff);
+            value += xVal * wVal;
+          }
+        }
+      }
+    }
+    ${applyActivation}
+    ${glsl.output} = vec4(value, .0, .0, .0);
+  }
+`;
+      return {
+        ...metadata,
+        output: {dims: outputShape, type: inputs[0].type, textureType: TextureType.unpacked},
+        shaderSource,
+        hasMain: true,
+      };
+    };
+
+const createUnpackedConvTransposeProgramInfoLoader =
+    (inferenceHandler: WebGLInferenceHandler, inputs: readonly Tensor[], attributes: ConvTransposeAttributes):
+        ProgramInfoLoader => {
+          const metadata = createConvTransposeProgramMetadata(inputs.length > 2, attributes.cacheKey);
+          return {
+            ...metadata,
+            get: () => createUnpackedConvTransposeProgramInfo(inferenceHandler, inputs, metadata, attributes)
+          };
+        };
+
+
+const convTranspose2DUnpacked =
+    (inferenceHandler: WebGLInferenceHandler, inputs: readonly Tensor[], attributes: ConvTransposeAttributes):
+        Tensor => {
+          const result = inferenceHandler.run(
+              createUnpackedConvTransposeProgramInfoLoader(inferenceHandler, inputs, attributes), inputs);
+          return result;
+        };
+
+const getAdjustedConvTransposeAttributes = <T extends ConvTransposeAttributes>(attributes: T, inputs: Tensor[]): T => {
+  const kernelShape = attributes.kernelShape.slice();
+  // if kernelShape is not specified in the attributes of this op, infer it from the weight tensor dims
+  if (attributes.kernelShape.length === 0) {
+    for (let i = 2; i < inputs[1].dims.length; ++i) {
+      kernelShape.push(inputs[1].dims[i]);
+    }
+  }
+
+  const pads = attributes.pads.slice();
+  const outputShape = attributes.outputShape.slice();
+  const inputShape = inputs[0].dims;
+  // If outputShape is not specified in the attributes of this op, infer it from the parameters
+  // Similarly, automatically infer pads if not specified
+  calculateOutputShapeAndPads(
+      inputShape, kernelShape, attributes.dilations, attributes.autoPad, pads, attributes.strides,
+      attributes.outputPadding, outputShape);
+
+  // always return a new object so does not modify the original attributes
+  const newAttributes: T = Object.assign({}, attributes);
+  Object.assign(newAttributes, {kernelShape, pads, outputShape, cacheKey: attributes.cacheKey});
+  return newAttributes;
+};
+
+export const parseConvTransposeAttributes: OperatorInitialization<ConvTransposeAttributes> =
+    (node: Graph.Node): ConvTransposeAttributes => {
+      const attributes = node.attributes;
+      const activationAttributes = parseInternalActivationAttributes(attributes);
+      // TODO : Make this generic enough to compute default attributes for multi-dimensional conv
+      const autoPad = attributes.getString('auto_pad', 'NOTSET');
+      const dilations = attributes.getInts('dilations', [1, 1]);
+      const group = attributes.getInt('group', 1);
+      const kernelShape = attributes.getInts('kernel_shape', []);
+      const outputPadding = attributes.getInts('output_padding', [0, 0]);
+      const outputShape = attributes.getInts('output_shape', []);
+      const pads = attributes.getInts('pads', [0, 0, 0, 0]);
+      const strides = attributes.getInts('strides', [1, 1]);
+
+      return createAttributeWithCacheKey(
+          {autoPad, dilations, group, kernelShape, outputPadding, outputShape, pads, strides, ...activationAttributes});
+    };
+
+const validateInputs = (inputs: Tensor[], attributes: ConvTransposeAttributes): void => {
+  // Refer to the below link for all input checks
+  // https://github.com/onnx/onnx/blob/master/docs/Operators.md#Conv
+  if (!inputs || (inputs.length !== 2 && inputs.length !== 3)) {
+    throw new Error('Conv requires 2 or 3 inputs');
+  }
+
+  // TODO : Need to add support for multi-dimensional conv
+  if (inputs[0].dims.length !== 4 || inputs[1].dims.length !== 4) {
+    throw new Error('currently only support 2-dimensional conv');
+  }
+
+  // FILTER_IN_CHANNEL should be equal to DATA_CHANNEL
+  const dataChannel = inputs[0].dims[1];
+  const filterInChannel = inputs[1].dims[0];
+  if (dataChannel !== filterInChannel) {
+    throw new Error('FILTER_IN_CHANNEL should be equal to DATA_CHANNEL');
+  }
+
+  const featureMaps = inputs[1].dims[1] * attributes.group;
+
+  // if bias is provided it should be 1D and the number of elements should be equal to the number of feature maps
+  if (inputs.length === 3 && (inputs[2].dims.length !== 1 || inputs[2].dims[0] !== featureMaps)) {
+    throw new Error('invalid bias');
+  }
+
+  const spatialRank = inputs[0].dims.length - 2;
+  // wrong dilations dimension
+  if (attributes.dilations.length !== spatialRank) {
+    throw new Error(`dilations should be ${spatialRank}D`);
+  }
+
+  // Wrong strides dimension
+  if (attributes.strides.length !== spatialRank) {
+    throw new Error(`strides should be ${spatialRank}D`);
+  }
+
+  // Wrong pads dimension
+  if (attributes.pads.length !== spatialRank * 2) {
+    throw new Error(`pads should be ${spatialRank * 2}D`);
+  }
+
+  // Wrong output padding dimension
+  if (attributes.outputPadding.length !== spatialRank) {
+    throw new Error(`output_padding should be ${spatialRank}D`);
+  }
+
+  // if kernelShape is specified, it's data length must be 2 less than dims length of the weights tensor
+  // (the first 2 dims are batch_size and channels)
+  if (attributes.kernelShape.length !== 0 && attributes.kernelShape.length !== inputs[1].dims.length - 2) {
+    throw new Error('invalid kernel shape');
+  }
+
+  // as with kernelShape, must have same number of spatial dims as input
+  if (attributes.outputShape.length !== 0 && attributes.outputShape.length !== inputs[0].dims.length - 2) {
+    throw new Error('invalid output shape');
+  }
+
+  // TODO : Need to add support for float64
+  if (inputs[0].type !== 'float32' || inputs[1].type !== 'float32') {
+    throw new Error('ConvTranspose input(X,W) should be float tensor');
+  }
+
+  if (inputs.length === 3 && inputs[2].type !== 'float32') {
+    throw new Error('ConvTranspose input(bias) should be float tensor');
+  }
+};

js/web/lib/onnxjs/backends/webgl/ops/dot-product.ts

@@ -7,7 +7,7 @@ import {getGlsl} from '../glsl-source';
 import {WebGLInferenceHandler} from '../inference-handler';
 import {ProgramInfo, ProgramInfoLoader, ProgramMetadata, TextureType} from '../types';
 
-import {getActicationSnippet, InternalActivationAttributes} from './fuse-utils';
+import {getActivationSnippet, InternalActivationAttributes} from './fuse-utils';
 import {calculateIm2ColDims} from './im2col';
 
 const createDotProductProgramMetadata = (hasBias: boolean, attributes: InternalActivationAttributes) => ({
@@ -35,7 +35,7 @@ const createDotProductProgramInfo =
 
       const initValue = (inputs.length < 3) ? '0.0' : '_B(b)';
       const sharedDim = Math.ceil(xshape[1] * kshape[2] * kshape[3] / 4);
-      const {activationFunction, applyActivation} = getActicationSnippet(attributes);
+      const {activationFunction, applyActivation} = getActivationSnippet(attributes);
       const glsl = getGlsl(inferenceHandler.session.backend.glContext.version);
       const shaderSource = `
 ${activationFunction}

js/web/lib/onnxjs/backends/webgl/ops/fuse-utils.ts

@@ -14,7 +14,7 @@ export interface InternalActivationAttributes {
   readonly activationCacheKey: string;
 }
 
-export function getActicationSnippet(attributes: InternalActivationAttributes) {
+export function getActivationSnippet(attributes: InternalActivationAttributes) {
   let func: GlslValueFunction;
   switch (attributes.activation) {
     case 'Relu':

js/web/lib/onnxjs/backends/webgl/ops/matmul-pack.ts

@@ -8,7 +8,7 @@ import {WebGLInferenceHandler} from '../inference-handler';
 import {ProgramInfo, ProgramInfoLoader, ProgramMetadata, TextureType} from '../types';
 import {getCoordsDataType, getGlChannels} from '../utils';
 
-import {getActicationSnippet, InternalActivationAttributes} from './fuse-utils';
+import {getActivationSnippet, InternalActivationAttributes} from './fuse-utils';
 import {getBiasForMatmul} from './matmul';
 
 const createPackedMatmulProgramMetadata = (hasBias: boolean, cacheHint: string) => ({
@@ -41,7 +41,7 @@ const createPackedMatmulProgramInfo =
       const coordsDataType = getCoordsDataType(outputShape.length);
       const outRank = outputShape.length;
       const allGlChannels = getGlChannels();
-      const {activationFunction, applyActivation} = getActicationSnippet(activationAttributes);
+      const {activationFunction, applyActivation} = getActivationSnippet(activationAttributes);
 
       const getBiasForMatmulSnippet =
           hasBias ? `${getBiasForMatmul(coordsDataType, allGlChannels, inputs[2].dims, outputShape, true)}` : '';

js/web/lib/onnxjs/backends/webgl/ops/matmul.ts

@@ -9,7 +9,7 @@ import {WebGLInferenceHandler} from '../inference-handler';
 import {ProgramInfo, ProgramInfoLoader, ProgramMetadata, TextureType} from '../types';
 import {getCoordsDataType, getGlChannels} from '../utils';
 
-import {getActicationSnippet, InternalActivationAttributes, parseInternalActivationAttributes} from './fuse-utils';
+import {getActivationSnippet, InternalActivationAttributes, parseInternalActivationAttributes} from './fuse-utils';
 import {createPackedMatmulProgramInfoLoader} from './matmul-pack';
 
 export const matMul: OperatorImplementation<InternalActivationAttributes> =
@@ -45,7 +45,7 @@ function createMatmulProgramInfo(
   }
   const coordsDataType = getCoordsDataType(outputShape.length);
   const allGlChannels = getGlChannels();
-  const {activationFunction, applyActivation} = getActicationSnippet(activationAttributes);
+  const {activationFunction, applyActivation} = getActivationSnippet(activationAttributes);
 
   const hasBias = inputs.length > 2;
   const processBias = hasBias ? 'value += getBiasForMatmul();' : '';

js/web/test/suite-test-list.jsonc

@@ -57,6 +57,14 @@
       "test_conv_with_strides_and_asymmetric_padding",
       "test_conv_with_strides_no_padding",
       "test_conv_with_strides_padding",
+      "test_convtranspose",
+      "test_convtranspose_pad",
+      "test_convtranspose_pads",
+      // TODO: add this when test-case file in opset v8 is fixed (i.e. output_shape has 2 dims)
+      // Might have to rewrite git history for that...
+      // "test_convtranspose_output_shape",
+      "test_convtranspose_kernel_shape",
+      "test_convtranspose_dilations",
       "test_constant",
       "test_cos_example",
       "test_cos",