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I believe I've added support for generating the array buffer for layouts ending in runtime-sized arrays to gpu-uniforms.js.

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Rezmason
2021-11-08 09:15:00 -08:00
parent 5747fb74a3
commit bd17549619
1 changed files with 15 additions and 10 deletions
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25
lib/gpu-uniforms.js
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@@ -1,16 +1,14 @@
/** PLAN /**
* *
* Note: This should go in its own repo * Meant to conform to the WGSL spec:
*
* Address every TODO item
* *
* https://gpuweb.github.io/gpuweb/wgsl/#alignment-and-size * https://gpuweb.github.io/gpuweb/wgsl/#alignment-and-size
* https://gpuweb.github.io/gpuweb/wgsl/#structure-layout-rules * https://gpuweb.github.io/gpuweb/wgsl/#structure-layout-rules
* *
* Create tests (maybe mocha?) * TODO:
* * - Put in own repo
* Document * - create mocha tests
* - examples of the simple constructor and from WGSL * - Document. Provide examples of the simple constructor and from WGSL
* *
**/ **/
@@ -157,7 +155,7 @@ const parseStruct = (str, structLayouts) => {
const minSizeInBytes = byteOffset * BYTES_PER_ELEMENT; const minSizeInBytes = byteOffset * BYTES_PER_ELEMENT;
const align = Math.max(...fields.map((field) => field.align)); const align = Math.max(...fields.map((field) => field.align));
const size = Math.ceil(minSizeInBytes / align) * align; // TODO: support runtime-sized arrays const size = Math.ceil(minSizeInBytes / align) * align;
return { name, fields, size, align }; return { name, fields, size, align };
}; };
@@ -211,7 +209,14 @@ const makeGenerator = (layout, structLayouts) => {
minSize, minSize,
create: () => makeDataForLayout(structLayouts, layout), create: () => makeDataForLayout(structLayouts, layout),
write: (object, destination, warnMissingFields = false) => { write: (object, destination, warnMissingFields = false) => {
destination ??= new ArrayBuffer(layout.size); // TODO: expand to support runtime-sized arrays, via the length of the array on the data object if (destination == null) {
let size = layout.size;
const lastField = layout.fields[layout.fields.length - 1];
if (lastField.isArray && lastField.name in object) {
size += lastField.stride * object[lastField.name].length;
}
destination = new ArrayBuffer(size);
}
const views = { const views = {
i32: new Int32Array(destination), i32: new Int32Array(destination),