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Add transient attachment usage to MSAA sample #547

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Add transient attachment usage to MSAA sample #547

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28 changes: 20 additions & 8 deletions sample/helloTriangleMSAA/main.ts
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
import { GUI } from 'dat.gui';
import triangleVertWGSL from '../../shaders/triangle.vert.wgsl';
import redFragWGSL from '../../shaders/red.frag.wgsl';
import { quitIfWebGPUNotAvailable } from '../util';
Expand All @@ -9,6 +10,12 @@ const adapter = await navigator.gpu?.requestAdapter({
const device = await adapter?.requestDevice();
quitIfWebGPUNotAvailable(adapter, device);

const settings = { transientAttachment: false };
if ('TRANSIENT_ATTACHMENT' in GPUTextureUsage) {
const gui = new GUI();
gui.add(settings, 'transientAttachment');
}

const context = canvas.getContext('webgpu');

const devicePixelRatio = window.devicePixelRatio;
Expand Down Expand Up @@ -48,15 +55,20 @@ const pipeline = device.createRenderPipeline({
},
});

const texture = device.createTexture({
size: [canvas.width, canvas.height],
sampleCount,
format: presentationFormat,
usage: GPUTextureUsage.RENDER_ATTACHMENT,
});
const view = texture.createView();

function frame() {
let usage = GPUTextureUsage.RENDER_ATTACHMENT;
if (settings.transientAttachment) {
usage |= GPUTextureUsage.TRANSIENT_ATTACHMENT;
}

const texture = device.createTexture({
size: [canvas.width, canvas.height],
sampleCount,
format: presentationFormat,
usage,
});
const view = texture.createView();

const commandEncoder = device.createCommandEncoder();

const renderPassDescriptor: GPURenderPassDescriptor = {
Expand Down