BindGroup

Source

index.js
import macro from 'vtk.js/Sources/macros';

// ----------------------------------------------------------------------------
// vtkWebGPUBindGroup methods
// ----------------------------------------------------------------------------

function vtkWebGPUBindGroup(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkWebGPUBindGroup');

publicAPI.setBindables = (bindables) => {
// is there a difference between the old and new list?
if (model.bindables.length === bindables.length) {
let allMatch = true;
for (let i = 0; i < model.bindables.length; i++) {
if (model.bindables[i] !== bindables[i]) {
allMatch = false;
}
}
if (allMatch) {
return;
}
}

// there is a difference
model.bindables = bindables;
publicAPI.modified();
};

publicAPI.getBindGroupLayout = (device) => {
const entries = [];
for (let i = 0; i < model.bindables.length; i++) {
const entry = model.bindables[i].getBindGroupLayoutEntry();
entry.binding = i;
entries.push(entry);
}
return device.getBindGroupLayout({ entries });
};

publicAPI.getBindGroup = (device) => {
// check mtime
let mtime = publicAPI.getMTime();
for (let i = 0; i < model.bindables.length; i++) {
const tm = model.bindables[i].getBindGroupTime().getMTime();
mtime = tm > mtime ? tm : mtime;
}
if (mtime < model.bindGroupTime.getMTime()) {
return model.bindGroup;
}

const entries = [];
for (let i = 0; i < model.bindables.length; i++) {
const entry = model.bindables[i].getBindGroupEntry();
entry.binding = i;
entries.push(entry);
}

model.bindGroup = device.getHandle().createBindGroup({
layout: publicAPI.getBindGroupLayout(device),
entries,
});
model.bindGroupTime.modified();

return model.bindGroup;
};

publicAPI.getShaderCode = (pipeline) => {
const lines = [];
const bgroup = pipeline.getBindGroupLayoutCount(model.name);
for (let i = 0; i < model.bindables.length; i++) {
lines.push(model.bindables[i].getShaderCode(i, bgroup));
}
return lines.join('\n');
};
}

// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------

const DEFAULT_VALUES = {
device: null,
handle: null,
name: null,
};

// ----------------------------------------------------------------------------

export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);

// Object methods
macro.obj(publicAPI, model);

model.bindables = [];

model.bindGroupTime = {};
macro.obj(model.bindGroupTime, { mtime: 0 });

macro.get(publicAPI, model, [
'bindGroupTime',
'handle',
'sizeInBytes',
'usage',
]);
macro.setGet(publicAPI, model, [
'name',
'device',
'arrayInformation',
'sourceTime',
]);

vtkWebGPUBindGroup(publicAPI, model);
}

// ----------------------------------------------------------------------------

export const newInstance = macro.newInstance(extend);

// ----------------------------------------------------------------------------

export default { newInstance, extend };