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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 vtkDataArray from '@kitware/vtk.js/Common/Core/DataArray';
import { Representation } from '@kitware/vtk.js/Rendering/Core/Property/Constants';
/**
* 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 scalars = image.getPointData() && image.getPointData().getScalars();
Iif (!scalars) {
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 numComp = scalars.getNumberOfComponents();
const iComps = vprop.getIndependentComponents();
const numIComps = iComps ? numComp : 1;
// rebuild opacity tfun?
let toString = `${vprop.getMTime()}`;
if (model.opacityTextureString !== toString) {
const oWidth = 1024;
const oSize = oWidth * 2 * numIComps;
const ofTable = new Float32Array(oSize);
const tmpTable = new Float32Array(oWidth);
for (let c = 0; c < numIComps; ++c) {
const ofun = vprop.getScalarOpacity(c);
const opacityFactor =
model.renderable.getSampleDistance() /
vprop.getScalarOpacityUnitDistance(c);
const oRange = ofun.getRange();
ofun.getTable(oRange[0], oRange[1], oWidth, tmpTable, 1);
// adjust for sample distance etc
for (let i = 0; i < oWidth; ++i) {
ofTable[c * oWidth * 2 + i] =
1.0 - (1.0 - tmpTable[i]) ** opacityFactor;
ofTable[c * oWidth * 2 + i + oWidth] = ofTable[c * oWidth * 2 + i];
}
}
model.opacityTexture.releaseGraphicsResources(model._openGLRenderWindow);
model.opacityTexture.setMinificationFilter(Filter.LINEAR);
model.opacityTexture.setMagnificationFilter(Filter.LINEAR);
// use float texture where possible because we really need the resolution
// for this table. Errors in low values of opacity accumulate to
// visible artifacts. High values of opacity quickly terminate without
// artifacts.
if (
model._openGLRenderWindow.getWebgl2() ||
(model.context.getExtension('OES_texture_float') &&
model.context.getExtension('OES_texture_float_linear'))
) {
model.opacityTexture.create2DFromRaw(
oWidth,
2 * numIComps,
1,
VtkDataTypes.FLOAT,
ofTable
);
} else E{
const oTable = new Uint8Array(oSize);
for (let i = 0; i < oSize; ++i) {
oTable[i] = 255.0 * ofTable[i];
}
model.opacityTexture.create2DFromRaw(
oWidth,
2 * numIComps,
1,
VtkDataTypes.UNSIGNED_CHAR,
oTable
);
}
model.opacityTextureString = toString;
}
// rebuild color tfun?
toString = `${vprop.getMTime()}`;
if (model.colorTextureString !== toString) {
const cWidth = 1024;
const cSize = cWidth * 2 * numIComps * 3;
const cTable = new Uint8Array(cSize);
const tmpTable = new Float32Array(cWidth * 3);
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.releaseGraphicsResources(model._openGLRenderWindow);
model.colorTexture.setMinificationFilter(Filter.LINEAR);
model.colorTexture.setMagnificationFilter(Filter.LINEAR);
model.colorTexture.create2DFromRaw(
cWidth,
2 * numIComps,
3,
VtkDataTypes.UNSIGNED_CHAR,
cTable
);
model.colorTextureString = toString;
}
publicAPI.updateLabelOutlineThicknessTexture(actor);
// rebuild the scalarTexture if the data has changed
toString = `${image.getMTime()}`;
if (model.scalarTextureString !== toString) {
// Build the textures
const dims = image.getDimensions();
const previousTextureParameters =
model.scalarTexture.getTextureParameters();
const dataType = image.getPointData().getScalars().getDataType();
const data = image.getPointData().getScalars().getData();
let shouldReset = true;
if (
previousTextureParameters.dataType &&
previousTextureParameters.dataType === dataType
) {
const previousTextureSize =
previousTextureParameters.width *
previousTextureParameters.height *
previousTextureParameters.depth *
previousTextureParameters.numComps;
Eif (data.length === previousTextureSize) {
shouldReset = false;
}
}
if (shouldReset) {
model.scalarTexture.setOglNorm16Ext(
model.context.getExtension('EXT_texture_norm16')
);
model.scalarTexture.releaseGraphicsResources(model._openGLRenderWindow);
model.scalarTexture.resetFormatAndType();
model.scalarTexture.create3DFilterableFromRaw(
dims[0],
dims[1],
dims[2],
numComp,
scalars.getDataType(),
scalars.getData(),
model.renderable.getPreferSizeOverAccuracy()
);
} else {
model.scalarTexture.deactivate();
model.scalarTexture.update3DFromRaw(data);
}
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.getRenderTargetSize = () => {
Iif (model._useSmallViewport) {
return [model._smallViewportWidth, model._smallViewportHeight];
}
const { usize, vsize } = model._openGLRenderer.getTiledSizeAndOrigin();
return [usize, vsize];
};
publicAPI.getRenderTargetOffset = () => {
const { lowerLeftU, lowerLeftV } =
model._openGLRenderer.getTiledSizeAndOrigin();
return [lowerLeftU, lowerLeftV];
};
// TODO: it seems like this may be needed to reset the GPU memory associated
// with a volume
// publicAPI.hardReset = () => {
// model.opacityTexture.releaseGraphicsResources(model._openGLRenderWindow);
// model.colorTexture.releaseGraphicsResources(model._openGLRenderWindow);
// model.scalarTexture.setOglNorm16Ext(
// model.context.getExtension('EXT_texture_norm16')
// );
// model.scalarTexture.releaseGraphicsResources(model._openGLRenderWindow);
// model.scalarTexture.resetFormatAndType();
// };
}
// ----------------------------------------------------------------------------
// 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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