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import vtkOpenGLTexture from '@kitware/vtk.js/Rendering/OpenGL/Texture';
import cache from '../../cache/cache';
import { getConstructorFromType } from '../../utilities/getBufferConfiguration';
/**
* Converts the input data array to the specified data type
* @param {TypedArray} data - The source data array
* @param {string} targetDataType - The target data type to convert to
* @returns {TypedArray} The converted data array
*/
function convertDataType(data, targetDataType) {
const Constructor = getConstructorFromType(targetDataType);
const convertedData = new Constructor(data.length);
convertedData.set(data);
return convertedData;
}
/**
* vtkStreamingOpenGLTexture - A derived class of the core vtkOpenGLTexture.
* This class has methods to update the texture memory on the GPU slice by slice
* in an efficient yet GPU-architecture friendly manner.
*
*
* @param {*} publicAPI The public API to extend
* @param {*} model The private model to extend.
*/
function vtkStreamingOpenGLTexture(publicAPI, model) {
model.classHierarchy.push('vtkStreamingOpenGLTexture');
model.updatedFrames = [];
model.volumeId = null;
const superCreate3DFilterableFromRaw = publicAPI.create3DFilterableFromRaw;
publicAPI.create3DFilterableFromRaw = (
width,
height,
depth,
numberOfComponents,
dataType,
data,
preferSizeOverAccuracy
) => {
model.inputDataType = dataType;
model.inputNumComps = numberOfComponents;
superCreate3DFilterableFromRaw(
width,
height,
depth,
numberOfComponents,
dataType,
data,
preferSizeOverAccuracy
);
};
const superUpdate = publicAPI.updateVolumeInfoForGL;
publicAPI.updateVolumeInfoForGL = (dataType, numComps) => {
const isScalingApplied = superUpdate(dataType, numComps);
model.volumeInfo.dataComputedScale = [1];
model.volumeInfo.dataComputedOffset = [0];
return isScalingApplied;
};
/**
* This function updates the GPU texture memory to match the current
* representation of data held in RAM.
*
*/
publicAPI.update3DFromRaw = () => {
const { volumeId } = model;
Iif (!volumeId) {
return;
}
const volume = cache.getVolume(volumeId);
model._openGLRenderWindow.activateTexture(publicAPI);
publicAPI.createTexture();
publicAPI.bind();
Iif (volume.isDynamicVolume()) {
updateDynamicVolumeTexture();
return;
}
return (
publicAPI.hasUpdatedFrames() && updateTextureImagesUsingVoxelManager()
);
};
/**
* Called when a frame is loaded so that on next render we know which data to load in.
* @param {number} frameIndex The frame to load in.
*/
const superModified = publicAPI.modified;
publicAPI.setUpdatedFrame = (frameIndex) => {
model.updatedFrames[frameIndex] = true;
superModified();
};
publicAPI.modified = () => {
superModified();
// this is really not efficient, but it works for now
const volume = cache.getVolume(model.volumeId);
Iif (!volume) {
return;
}
const imageIds = volume.imageIds;
for (let i = 0; i < imageIds.length; i++) {
model.updatedFrames[i] = true;
}
};
function updateTextureImagesUsingVoxelManager() {
const volume = cache.getVolume(model.volumeId);
const imageIds = volume.imageIds;
for (let i = 0; i < model.updatedFrames.length; i++) {
if (model.updatedFrames[i]) {
// find the updated frames
const image = cache.getImage(imageIds[i]);
if (!image) {
// console.debug('image not found', imageIds[i]);
continue;
}
let data = image.voxelManager.getScalarData();
const gl = model.context;
Iif (volume.dataType !== data.constructor.name) {
data = convertDataType(data, volume.dataType);
}
const [pixData] = publicAPI.updateArrayDataTypeForGL(volume.dataType, [
data,
]);
// Bind the texture
publicAPI.bind();
// Calculate the offset within the 3D texture
const zOffset = i;
// Update the texture sub-image
// Todo: need to check other systems if it can handle it
gl.texSubImage3D(
model.target, // target
0, // level
0, // xoffset
0, // yoffset
zOffset, // zoffset
model.width, // width
model.height, // height
1, // depth (1 slice)
model.format, // format
model.openGLDataType, // type
pixData // data
);
// Unbind the texture
publicAPI.deactivate();
// Reset the updated flag
model.updatedFrames[i] = null;
}
}
Iif (model.generateMipmap) {
model.context.generateMipmap(model.target);
}
publicAPI.deactivate();
return true;
}
function updateDynamicVolumeTexture() {
const volume = cache.getVolume(model.volumeId);
// loop over imageIds of the current time point and update the texture
const imageIds = volume.getCurrentDimensionGroupImageIds();
if (!imageIds.length) {
return false;
}
let constructor;
for (let i = 0; i < imageIds.length; i++) {
const imageId = imageIds[i];
const image = cache.getImage(imageId);
let data;
if (!image) {
// if there is no data we should set zero
constructor = getConstructorFromType(volume.dataType, true);
data = new constructor(model.width * model.height);
} else {
data = image.voxelManager.getScalarData();
constructor = data.constructor;
}
const gl = model.context;
if (volume.dataType !== data.constructor.name) {
data = convertDataType(data, volume.dataType);
}
const [pixData] = publicAPI.updateArrayDataTypeForGL(volume.dataType, [
data,
]);
// Bind the texture
publicAPI.bind();
// Calculate the offset within the 3D texture
let zOffset = i;
// Update the texture sub-image
// Todo: need to check other systems if it can handle it
gl.texSubImage3D(
model.target, // target
0, // level
0, // xoffset
0, // yoffset
zOffset, // zoffset
model.width, // width
model.height, // height
1, // depth (1 slice)
model.format, // format
model.openGLDataType, // type
pixData // data
);
// Unbind the texture
publicAPI.deactivate();
// Reset the updated flag
}
if (model.generateMipmap) {
model.context.generateMipmap(model.target);
}
publicAPI.deactivate();
return true;
}
publicAPI.hasUpdatedFrames = () =>
!model.updatedFrames.length || model.updatedFrames.some((frame) => frame);
publicAPI.getUpdatedFrames = () => model.updatedFrames;
publicAPI.setVolumeId = (volumeId) => {
model.volumeId = volumeId;
};
publicAPI.getVolumeId = () => model.volumeId;
publicAPI.setTextureParameters = ({
width,
height,
depth,
numberOfComponents,
dataType,
}) => {
model.width ??= width;
model.height ??= height;
model.depth ??= depth;
model.inputNumComps ??= numberOfComponents;
model.inputDataType ??= dataType;
};
publicAPI.getTextureParameters = () => ({
width: model.width,
height: model.height,
depth: model.depth,
numberOfComponents: model.inputNumComps,
dataType: model.inputDataType,
});
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
updatedFrames: [],
};
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
vtkOpenGLTexture.extend(publicAPI, model, initialValues);
// Object methods
vtkStreamingOpenGLTexture(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(
extend,
'vtkStreamingOpenGLTexture'
);
// ----------------------------------------------------------------------------
export default { newInstance, extend };
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