WebGPU-React-Bitmap-Viewport - a React component that uses WebGPU to render bitmap data within a set of viewports synchronously

• A React component displaying bitmap data as a set of viewport contents with use of WebGPU API, without dependencies other than React.
• Dynamic synchronization of GPUBuffers from JavaScript image data (e.g., Uint32Array of RGBA color values).
• Dynamic extraction and rendering a set of (one or more) viewport contents from GPUBuffers.
• Interactive viewport navigation via mouse drag and scrollbar handling, as well as zoom in and out via the mouse wheel.
• Customizable for bitmap image size, viewport display size, canvas size, header area size, and scrollbar size through React component props.
• Highlights the column and row under the current mouse pointer.
• Allows toggling the selected state of each column and row, and highlight the selected ones.

Download and Installation

Download the latest version of webgpu-react-bitmap-viewport from the npm repository:

pnpm install webgpu-react-bitmap-viewport
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API

doc

Live Demo

cd examples
pnpm install && pnpm dev
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Live demo

• Synchronized Viewports of Static Image: "The Grate Wave off Kanagawa" from the series Thirty-six Views of Mount Fuji by Hokusai
• Synchronized Viewports of Dynamic Image: Randomly generated data
• Viewport of Multi Agent Simulation: Schelling's model of segregation implemented with Vanilla-JS/WebGPU/WebAssembly

Code Example

import { Grid, GridHandles } from "webgpu-react-bitmap-viewport";
import { useRef } from "react";

const gridSize = { numColumns: 128, numRows: 128 };

const data =  new Float32Array(gridSize.numRows * gridSize.numColumns);
for (let i = 0; i < data.length; i++) {
  if (Math.random() < 0.99) {
    data[i] = i / data.length;
  } else {
    data[i] = Infinity;
  }
}

const focusedCellPosition = new Uint32Array([-1, -1]);
const selectedStates = new Uint32Array(Math.ceil(gridSize.numRows * gridSize.numColumns / 32));

const viewportStates = new Float32Array([
  0.0, 0.0, 16.0, 16.0, // viewport index 0: left, top, right, bottom
  8.0, 8.0, 24.0, 24.0, // viewport index 1: left, top, right, bottom
]);

export const Index = () => {
  const gridHandlerRefs =
    [
      useRef<GridHandles>(null),
      useRef<GridHandles>(null)
    ];

  return (
    <>
      <Grid
        index={0}
        ref={gridHandlerRefs[0]}
        numViewports={2}
        headerOffset={{ left: 10, top: 10 }}
        canvasSize={{ width: 138, height: 138 }}
        numColumns={gridSize.numColumns}
        numRows={gridSize.numRows}
        scrollBar={{
          radius: 5.0,
          margin: 2.0,
        }}
        data={data}
        focusedCellPosition={focusedCellPosition}
        selectedStates={selectedStates}
        viewportStates={viewportStates}
        onFocusedCellPositionChange={(sourceIndex: number, columnIndex: number, rowIndex: number) => {
          gridHandlerRefs[1].current?.refreshFocusedCellPosition(sourceIndex, columnIndex, rowIndex);
        }}
        onSelectedStateChange={(sourceIndex:number, columnIndex: number, rowIndex: number) => {
          gridHandlerRefs[1].current?.refreshSelectedState(sourceIndex, columnIndex, rowIndex);
        }}
        onViewportStateChange={(sourceIndex: number) => {
          gridHandlerRefs[1].current?.refreshViewportState(sourceIndex);
        }}
      />
      <Grid
        index={1}
        ref={gridHandlerRefs[1]}
        numViewports={2}
        headerOffset={{ left: 10, top: 10 }}
        canvasSize={{ width: 138, height: 138 }}
        numColumns={gridSize.numColumns}
        numRows={gridSize.numRows}
        scrollBar={{
          radius: 5.0,
          margin: 2.0,
        }}
        data={data}
        focusedCellPosition={focusedCellPosition}
        selectedStates={selectedStates}
        viewportStates={viewportStates}
        onFocusedCellPositionChange={(sourceIndex: number, columnIndex: number, rowIndex: number) => {
          gridHandlerRefs[0].current?.refreshFocusedCellPosition(sourceIndex, columnIndex, rowIndex);
        }}
        onSelectedStateChange={(sourceIndex: number, columnIndex: number, rowIndex: number) => {
          gridHandlerRefs[0].current?.refreshSelectedState(sourceIndex, columnIndex, rowIndex);
        }}
        onViewportStateChange={(sourceIndex: number) => {
          gridHandlerRefs[0].current?.refreshViewportState(sourceIndex);
        }}
      />
    </>
  );
}
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Design

graph TD;
        Application((Application))
        Application --> |width,height|canvasSize
        Application --> |numColumns,numRows|GridSize --> GridProps
        Application ==> |numColumns*numRows|data
        Application ==> |left,top,right,bottom|viewportStates
        Application ==> focusedStates
        Application ==> selectedStates
    data -->|Float32Array| GridProps[GridProps]
    focusedStates --> |Uint32Array| GridProps
    selectedStates --> |Uint32Array| GridProps
    viewportStates --> |Float32Array| GridProps
    canvasSize --> GridProps
    GridProps --> |React Component Property| Grid
    Application --> |React Component|Grid
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graph TD;
        Application((Application)) --> |refreshFocusedState|Grid
        Application --> |refreshSelectedState|Grid
        Application --> |refreshViewportState|Grid
        Grid -.-> |onFocusedStateChange|Application
        Grid -.-> |onSelectedStateChange|Application
        Grid -.-> |onViewportStateChange|Application
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graph TD;
    subgraph Inside React Component: part 1
    GridProps ---> |React Component Property| Grid
        refreshFocusedState[/refreshFocusedState\] -.-> |React Component Method| Grid
        refreshSelectedState[/refreshSelectedState\] -.-> |React Component Method| Grid
        refreshViewportState[/refreshViewportState\] -.-> |React Component Method| Grid
    Grid --> |canvasSize|CanvasElementContext --> GridUI
    CanvasElementContext --> |width,height|canvas
    Grid --> |refreshFocusedState,refreshSelectedState,refreshViewportState|GridUI
    Grid --> |gridSize|GridContext --> GridUI
    Grid --> |viewportStates|ViewportGroupContext --> GridUI     
    Grid --> WebGPUContext --> |device,canvasContext,format,texture| GridUI
    GridContext --> GridUI
    CanvasElementContext --> WebGPUContext
    GridContext --> WebGPUContext
    onMouseEnter[/onMouseEnter\] -.-> canvas
    onMouseOut[/onMouseLeave\] -.-> canvas
    onMouseDown[/onMouseDown\] -.-> canvas
    onMouseMove[/onMouseMove\] -.-> canvas
    end
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graph TD;
    subgraph Inside React Component: part 2    
    GridUI --> F32UniformBufferSource --> GPUBuffer
    GridUI --> U32UniformBufferSource --> GPUBuffer
    GridUI --> data --> GPUBuffer
    GridUI --> focusedCellPosition --> GPUBuffer
    GridUI --> selectedStates --> GPUBuffer
    GPUBindGroupLayout --> GPUPipelineLayout
    GPUPipelineLayout --> GPURenderPipeline
    WGSL[[WGSLGridShader]] --> GPUShaderModule
    GPUShaderModule --> GPURenderPipeline
    Vertices --> GPUBuffer
    GPUBuffer --> GPUBindGroup
    GPUBindGroupLayout --> GPUBindGroup
    GPURenderPipeline --> GPURenderBundle
    GPUBindGroup --> GPURenderBundle
    GridUI --> GPUBindGroupLayout
    GridUI --> Vertices
    GridUI --> GPURenderPassEncoder
    GPURenderBundle --> GPURenderPassEncoder
    GPURenderPassEncoder --> |submit|GPUDevice
    end
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Prerequisites:

• WebGPU compatible browser (e.g. Chrome with WebGPU enabled)
• react: ^18.2.0
• react-dom: ^18.2.0

Licensing

webgpu-react-bitmap-viewport is published under the MIT License (MIT).

(c) 2024 Hiroya Kubo

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Author

Hiroya Kubo