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import vtkOpenGLVolumeMapper from '@kitware/vtk.js/Rendering/OpenGL/VolumeMapper';
import { Filter } from '@kitware/vtk.js/Rendering/OpenGL/Texture/Constants';
import { VtkDataTypes } from '@kitware/vtk.js/Common/Core/DataArray/Constants';
import { getTransferFunctionHash } from '@kitware/vtk.js/Rendering/OpenGL/RenderWindow/resourceSharingHelper';
import vtkDataArray from '@kitware/vtk.js/Common/Core/DataArray';
import { Representation } from '@kitware/vtk.js/Rendering/Core/Property/Constants';
import vtkOpenGLTexture from '@kitware/vtk.js/Rendering/OpenGL/Texture';
import { getConstructorFromType } from '../../utilities/getBufferConfiguration';
import { getCanUseNorm16Texture } from '../../init';
/**
* vtkStreamingOpenGLVolumeMapper - A derived class of the core vtkOpenGLVolumeMapper class.
* This class replaces the buildBufferObjects function so that we progressively upload our textures
* into GPU memory using the new methods on vtkStreamingOpenGLTexture.
*
* @param {*} publicAPI The public API to extend
* @param {*} model The private model to extend.
*/
function vtkStreamingOpenGLVolumeMapper(publicAPI, model) {
model.classHierarchy.push('vtkStreamingOpenGLVolumeMapper');
/**
* buildBufferObjects - A fork of vtkOpenGLVolumeMapper's buildBufferObjects method.
* This fork performs most of the same actions, but builds the textures progressively using
* vtkStreamingOpenGLTexture's methods, and also prevents recomputation of the texture for each
* vtkStreamingOpenGLVolumeMapper using the texture.
*
*
* @param {*} ren The renderer.
* @param {*} actor The actor to build the buffer objects for.
*/
publicAPI.buildBufferObjects = (ren, actor) => {
const image = model.currentInput;
Iif (!image) {
return;
}
const vprop = actor.getProperty();
if (!model.jitterTexture.getHandle()) {
const oTable = new Uint8Array(32 * 32);
for (let i = 0; i < 32 * 32; ++i) {
oTable[i] = 255.0 * Math.random();
}
model.jitterTexture.setMinificationFilter(Filter.LINEAR);
model.jitterTexture.setMagnificationFilter(Filter.LINEAR);
model.jitterTexture.create2DFromRaw(
32,
32,
1,
VtkDataTypes.UNSIGNED_CHAR,
oTable
);
}
const { numberOfComponents: numIComps } = image.get('numberOfComponents');
const useIndependentComps = publicAPI.useIndependentComponents(vprop);
const scalarOpacityFunc = vprop.getScalarOpacity();
const opTex =
model._openGLRenderWindow.getGraphicsResourceForObject(scalarOpacityFunc);
let toString = getTransferFunctionHash(
scalarOpacityFunc,
useIndependentComps,
numIComps
);
const reBuildOp = !opTex?.oglObject || opTex.hash !== toString;
if (reBuildOp) {
model.opacityTexture = vtkOpenGLTexture.newInstance();
model.opacityTexture.setOpenGLRenderWindow(model._openGLRenderWindow);
// rebuild opacity tfun?
const oWidth = 1024;
const oSize = oWidth * 2 * numIComps;
const ofTable = new Float32Array(oSize);
const tmpTable = new Float32Array(oWidth);
// for debugging
// for (let index = 0; index < 3; index++) {
// const ofun = vprop.getScalarOpacity(0);
// const nodeValue1 = [];
// ofun.getNodeValue(index, nodeValue1);
// console.debug(index, nodeValue1);
// }
for (let c = 0; c < numIComps; ++c) {
const ofun = vprop.getScalarOpacity(c);
const opacityFactor =
publicAPI.getCurrentSampleDistance(ren) /
vprop.getScalarOpacityUnitDistance(c);
const oRange = ofun.getRange();
ofun.getTable(oRange[0], oRange[1], oWidth, tmpTable, 1);
// adjust for sample distance etc
for (let i = 0; i < oWidth; ++i) {
ofTable[c * oWidth * 2 + i] =
1.0 - (1.0 - tmpTable[i]) ** opacityFactor;
ofTable[c * oWidth * 2 + i + oWidth] = ofTable[c * oWidth * 2 + i];
}
}
model.opacityTexture.resetFormatAndType();
model.opacityTexture.setMinificationFilter(Filter.LINEAR);
model.opacityTexture.setMagnificationFilter(Filter.LINEAR);
// use float texture where possible because we really need the resolution
// for this table. Errors in low values of opacity accumulate to
// visible artifacts. High values of opacity quickly terminate without
// artifacts.
Iif (
model._openGLRenderWindow.getWebgl2() &&
model.context.getExtension('OES_texture_float') &&
model.context.getExtension('OES_texture_float_linear')
) {
model.opacityTexture.create2DFromRaw(
oWidth,
2 * numIComps,
1,
VtkDataTypes.FLOAT,
ofTable
);
} else {
const oTable = new Uint8ClampedArray(oSize);
for (let i = 0; i < oSize; ++i) {
oTable[i] = 255.0 * ofTable[i];
}
model.opacityTexture.create2DFromRaw(
oWidth,
2 * numIComps,
1,
VtkDataTypes.UNSIGNED_CHAR,
oTable
);
}
Eif (scalarOpacityFunc) {
model._openGLRenderWindow.setGraphicsResourceForObject(
scalarOpacityFunc,
model.opacityTexture,
toString
);
if (scalarOpacityFunc !== model._scalarOpacityFunc) {
model._openGLRenderWindow.registerGraphicsResourceUser(
scalarOpacityFunc,
publicAPI
);
model._openGLRenderWindow.unregisterGraphicsResourceUser(
model._scalarOpacityFunc,
publicAPI
);
}
model._scalarOpacityFunc = scalarOpacityFunc;
}
} else {
model.opacityTexture = opTex.oglObject;
}
// rebuild color tfun?
const colorTransferFunc = vprop.getRGBTransferFunction();
toString = getTransferFunctionHash(
colorTransferFunc,
useIndependentComps,
numIComps
);
const cTex =
model._openGLRenderWindow.getGraphicsResourceForObject(colorTransferFunc);
const reBuildC = !cTex?.oglObject?.getHandle() || cTex?.hash !== toString;
if (reBuildC) {
model.colorTexture = vtkOpenGLTexture.newInstance();
model.colorTexture.setOpenGLRenderWindow(model._openGLRenderWindow);
const cWidth = 1024;
const cSize = cWidth * 2 * numIComps * 3;
const cTable = new Uint8ClampedArray(cSize);
const tmpTable = new Float32Array(cWidth * 3);
// // for debugging
// for (let index = 0; index < 3; index++) {
// const cfun = vprop.getRGBTransferFunction(0);
// const nodeValue1 = [];
// cfun.getNodeValue(index, nodeValue1);
// console.debug(index, nodeValue1);
// }
for (let c = 0; c < numIComps; ++c) {
const cfun = vprop.getRGBTransferFunction(c);
const cRange = cfun.getRange();
cfun.getTable(cRange[0], cRange[1], cWidth, tmpTable, 1);
for (let i = 0; i < cWidth * 3; ++i) {
cTable[c * cWidth * 6 + i] = 255.0 * tmpTable[i];
cTable[c * cWidth * 6 + i + cWidth * 3] = 255.0 * tmpTable[i];
}
}
model.colorTexture.resetFormatAndType();
model.colorTexture.setMinificationFilter(Filter.LINEAR);
model.colorTexture.setMagnificationFilter(Filter.LINEAR);
model.colorTexture.create2DFromRaw(
cWidth,
2 * numIComps,
3,
VtkDataTypes.UNSIGNED_CHAR,
cTable
);
Eif (colorTransferFunc) {
model._openGLRenderWindow.setGraphicsResourceForObject(
colorTransferFunc,
model.colorTexture,
toString
);
Eif (colorTransferFunc !== model._colorTransferFunc) {
model._openGLRenderWindow.registerGraphicsResourceUser(
colorTransferFunc,
publicAPI
);
model._openGLRenderWindow.unregisterGraphicsResourceUser(
model._colorTransferFunc,
publicAPI
);
}
model._colorTransferFunc = colorTransferFunc;
}
} else {
model.colorTexture = cTex.oglObject;
}
publicAPI.updateLabelOutlineThicknessTexture(actor);
// rebuild the scalarTexture if the data has changed
// IMPORTANT: this is the most important part of the streaming process.
// we need to take into account that sometimes the texture is updated (mtime)
// but the image is not updated since in the new model the image lives in the cpu
// while the texture lives in the gpu.
toString = `${image.getMTime()}-${model.scalarTexture.getMTime()}`;
if (model.scalarTextureString !== toString) {
// Build the textures
const dims = image.getDimensions();
model.scalarTexture.setOpenGLRenderWindow(model._openGLRenderWindow);
// Set not to use half float initially since we don't know if the
// streamed data is actually half float compatible or not yet, as
// the data has not arrived due to streaming
model.scalarTexture.enableUseHalfFloat(false);
const previousTextureParameters =
model.scalarTexture.getTextureParameters();
const dataType = image.get('dataType').dataType;
let shouldReset = true;
if (previousTextureParameters?.dataType === dataType) {
Eif (previousTextureParameters?.width === dims[0]) {
Eif (previousTextureParameters?.height === dims[1]) {
Eif (previousTextureParameters?.depth === dims[2]) {
shouldReset = false;
}
}
}
}
if (shouldReset) {
const norm16Ext = model.context.getExtension('EXT_texture_norm16');
model.scalarTexture.setOglNorm16Ext(
getCanUseNorm16Texture() ? norm16Ext : null
);
model.scalarTexture.resetFormatAndType();
model.scalarTexture.setTextureParameters({
width: dims[0],
height: dims[1],
depth: dims[2],
numberOfComponents: numIComps,
dataType,
});
// const emptyDataTypeOfType = getConstructorFromType(dataType);
// const emptyData = new emptyDataTypeOfType(dims[0] * dims[1] * dims[2]);
// There are some bugs in mac for texStorage3D so basically here
// we let the vtk.js decide if it wants to use it or not
model.scalarTexture.create3DFromRaw(
dims[0],
dims[1],
dims[2],
numIComps,
dataType,
null
// emptyData
);
// do an initial update since some data may be already
// available and we can avoid a re-render to trigger
// the update
model.scalarTexture.update3DFromRaw();
// since we don't have scalars we don't need to set graphics resource for the scalar texture
} else {
model.scalarTexture.deactivate();
model.scalarTexture.update3DFromRaw();
}
model.scalarTextureString = toString;
}
if (!model.tris.getCABO().getElementCount()) {
// build the CABO
const ptsArray = new Float32Array(12);
for (let i = 0; i < 4; i++) {
ptsArray[i * 3] = (i % 2) * 2 - 1.0;
ptsArray[i * 3 + 1] = i > 1 ? 1.0 : -1.0;
ptsArray[i * 3 + 2] = -1.0;
}
const cellArray = new Uint16Array(8);
cellArray[0] = 3;
cellArray[1] = 0;
cellArray[2] = 1;
cellArray[3] = 3;
cellArray[4] = 3;
cellArray[5] = 0;
cellArray[6] = 3;
cellArray[7] = 2;
const points = vtkDataArray.newInstance({
numberOfComponents: 3,
values: ptsArray,
});
points.setName('points');
const cells = vtkDataArray.newInstance({
numberOfComponents: 1,
values: cellArray,
});
model.tris.getCABO().createVBO(cells, 'polys', Representation.SURFACE, {
points,
cellOffset: 0,
});
}
model.VBOBuildTime.modified();
};
publicAPI.getNeedToRebuildBufferObjects = (ren, actor) => {
if (
model.VBOBuildTime.getMTime() < publicAPI.getMTime() ||
model.VBOBuildTime.getMTime() < actor.getMTime() ||
model.VBOBuildTime.getMTime() < model.renderable.getMTime() ||
model.VBOBuildTime.getMTime() < actor.getProperty().getMTime() ||
model.VBOBuildTime.getMTime() < model.currentInput.getMTime() ||
model.VBOBuildTime.getMTime() < model.scalarTexture?.getMTime() ||
model.VBOBuildTime.getMTime() < model.colorTexture?.getMTime() ||
model.VBOBuildTime.getMTime() <
model.labelOutlineThicknessTexture?.getMTime() ||
!model.scalarTexture?.getHandle() ||
!model.colorTexture?.getHandle() ||
!model.labelOutlineThicknessTexture?.getHandle()
) {
return true;
}
return false;
};
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {};
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
vtkOpenGLVolumeMapper.extend(publicAPI, model, initialValues);
model.scalarTexture = initialValues.scalarTexture;
model.previousState = {};
// Object methods
vtkStreamingOpenGLVolumeMapper(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(
extend,
'vtkStreamingOpenGLVolumeMapper'
);
// ----------------------------------------------------------------------------
export default { newInstance, extend };
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