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[js/webgpu] fix buffer size when download #15990

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May 20, 2023
Merged

[js/webgpu] fix buffer size when download #15990

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5 changes: 3 additions & 2 deletions js/web/lib/wasm/jsep/webgpu/gpu-data-manager.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -195,12 +195,13 @@ class GpuDataManagerImpl implements GpuDataManager {

const commandEncoder = this.backend.getCommandEncoder();
this.backend.endComputePass();
const bufferSize = calcNormalizedBufferSize(cachedData.originalSize);
const gpuReadBuffer = this.backend.device.createBuffer(
// eslint-disable-next-line no-bitwise
{size: cachedData.originalSize, usage: GPUBufferUsage.COPY_DST | GPUBufferUsage.MAP_READ});
{size: bufferSize, usage: GPUBufferUsage.COPY_DST | GPUBufferUsage.MAP_READ});
commandEncoder.copyBufferToBuffer(
cachedData.gpuData.buffer /* source buffer */, 0 /* source offset */, gpuReadBuffer /* destination buffer */,
0 /* destination offset */, cachedData.originalSize /* size */
0 /* destination offset */, bufferSize /* size */
);
this.backend.flush();

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