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Merge pull request #26 from imec-int/feature/PREC-232-add-bitmap-layer
[PREC-232] add bitmap layer
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119 changes: 119 additions & 0 deletions
119
src/deckgl-layers/float-bitmap-layer/float-bitmap-layer.js
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| // Copyright (c) 2023 Uber Technologies, Inc. | ||
| // | ||
| // 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. | ||
|
|
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| import GL from '@luma.gl/constants'; | ||
| import {BitmapLayer} from '@deck.gl/layers'; | ||
| import {Texture2D} from '@luma.gl/webgl'; | ||
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| // Define a new bitmap layer type that can receive binary image data | ||
| class FloatBitmapLayer extends BitmapLayer { | ||
| initializeState() { | ||
| super.initializeState(); | ||
| const {gl} = this.context; | ||
| const {binaryData, colorScale, width, height} = this.props; | ||
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| // Preallocate the color array (RGBA) | ||
| const coloredData = new Uint8Array(binaryData.length * 4); | ||
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| // Convert color legend colors to rgb | ||
| const colorScaleRGB = colorScale.colors.map(color => hexToUnsignedInt(color)); | ||
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| binaryData.forEach((value, index) => { | ||
| const i = index * 4; | ||
| value = Math.max(0, value); | ||
| // Find the index of the value based on the ranges | ||
| let colorIndex = colorScale.ranges.findIndex(range => value <= range); | ||
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| // If the value is out of range, use the first color | ||
| colorIndex = colorIndex === -1 ? 0 : colorIndex; | ||
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| const color = colorScaleRGB[colorIndex]; | ||
| coloredData[i] = color[0]; | ||
| coloredData[i + 1] = color[1]; | ||
| coloredData[i + 2] = color[2]; | ||
| // If the color has an alpha channel, use it | ||
| if (color.length === 4) coloredData[i + 3] = color[3]; | ||
| else coloredData[i + 3] = 255; | ||
| }); | ||
|
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| const image = new Texture2D(gl, { | ||
| data: coloredData, | ||
| format: gl.RGBA, | ||
| mipmaps: false, | ||
| width, | ||
| height, | ||
| parameters: { | ||
| [GL.TEXTURE_MAG_FILTER]: GL.NEAREST, | ||
| [GL.TEXTURE_MIN_FILTER]: GL.NEAREST | ||
| }, | ||
| compressed: false | ||
| }); | ||
|
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| this.setState({image}); | ||
| } | ||
|
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| draw(opts) { | ||
| const {uniforms, moduleParameters} = opts; | ||
| const {model, coordinateConversion, bounds, disablePicking, image} = this.state; | ||
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| if (moduleParameters.pickingActive && disablePicking) { | ||
| return; | ||
| } | ||
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| // Render the image | ||
| if (image && model) { | ||
| model | ||
| .setUniforms(uniforms) | ||
| .setUniforms({ | ||
| bitmapTexture: image, | ||
| coordinateConversion, | ||
| tintColor: [1, 1, 1], | ||
| transparentColor: [0, 0, 0, 0], | ||
| desaturate: 0, | ||
| bounds | ||
| }) | ||
| .draw(); | ||
| } | ||
| } | ||
|
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| finalizeState() { | ||
| super.finalizeState(this.context); | ||
| const {gl} = this.context; | ||
| const {image} = this.state; | ||
|
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| // Cleanup the texture when the layer is removed | ||
| gl.deleteTexture(image); | ||
| } | ||
| } | ||
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| export default FloatBitmapLayer; | ||
|
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| function hexToUnsignedInt(input) { | ||
| // Drop the # if it exists | ||
| if (input[0] === '#') { | ||
| input = input.substring(1); | ||
| } | ||
| const channels = input.length / 2; | ||
| var colors = new Uint8Array(channels); | ||
| for (var n = 0; n < input.length; n++) { | ||
| colors[n] = parseInt(input.substring(n * 2, n * 2 + 2), 16); | ||
| } | ||
| return colors; | ||
| } |
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