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<!doctype html>
<!-- Render a triangle to a storage texture. The triangle should be displayed.
Regression test for https://bugzilla.mozilla.org/show_bug.cgi?id=1972921. -->
<html class="reftest-wait">
<head>
<meta charset="utf-8" />
</head>
<body>
<canvas id="canvas" width=512 height=512></canvas>
</body>
<script>
(async function() {
try {
var triangleVertWGSL = `@vertex
fn main(
@builtin(vertex_index) VertexIndex : u32
) -> @builtin(position) vec4f {
var pos = array<vec2f, 3>(
vec2(0.0, 3.0),
vec2(-2.0, -1.0),
vec2(2.0, -1.0)
);
return vec4f(pos[VertexIndex], 0.0, 1.0);
}
`;
var redFragWGSL = `
@group(0) @binding(0) var output: texture_storage_2d<{PRESENTATION_FORMAT}, write>;
@fragment
fn main(@builtin(position) pos: vec4f) -> @location(0) vec4f {
let x = i32(pos.x);
let y = i32(pos.y);
if (y >= 128 && y < 384 && 2 * x >= 640 - y && 2 * x < 384 + y) {
textureStore(output, vec2(x, y), vec4f(1, 0, 0, 1));
} else {
textureStore(output, vec2(x, y), vec4f(0, 0, 0, 1));
}
return vec4(0.0, 0.0, 0.0, 0.0);
}`;
const canvas = document.querySelector('canvas');
const adapter = await navigator.gpu?.requestAdapter({ });
const presentationFormat = navigator.gpu.getPreferredCanvasFormat();
if (presentationFormat != 'rgba8unorm' && presentationFormat != 'bgra8unorm') {
throw new Error('Unsupported presentation format: ' + presentationFormat);
}
const deviceDescriptor = {};
if (presentationFormat == 'bgra8unorm') {
if (!adapter.features.has('bgra8unorm-storage')) {
console.warn('Using rgba8unorm because bgra8unorm-storage feature is not available');
presentationFormat = 'rgba8unorm';
} else {
deviceDescriptor.requiredFeatures = ['bgra8unorm-storage'];
}
}
const device = await adapter?.requestDevice(deviceDescriptor);
const context = canvas.getContext('webgpu');
const devicePixelRatio = window.devicePixelRatio;
canvas.width = canvas.clientWidth * devicePixelRatio;
canvas.height = canvas.clientHeight * devicePixelRatio;
context.configure({
device,
format: presentationFormat,
usage: GPUTextureUsage.STORAGE_BINDING,
});
const canvasView = context.getCurrentTexture().createView();
const dummyTexture = device.createTexture({
size: { width: 512, height: 512, depth: 1 },
format: presentationFormat,
usage: GPUTextureUsage.RENDER_ATTACHMENT,
});
const dummyView = dummyTexture.createView();
const bindGroupLayout = device.createBindGroupLayout({
entries: [
{
binding: 0,
visibility: GPUShaderStage.FRAGMENT,
storageTexture: {
access: 'write-only',
format: presentationFormat,
viewDimension: '2d',
},
},
],
});
const bindGroup = device.createBindGroup({
layout: bindGroupLayout,
entries: [
{
binding: 0,
resource: canvasView,
},
],
});
const pipelineLayout = device.createPipelineLayout({
bindGroupLayouts: [bindGroupLayout],
});
const pipeline = device.createRenderPipeline({
layout: pipelineLayout,
vertex: {
module: device.createShaderModule({
code: triangleVertWGSL,
}),
},
fragment: {
module: device.createShaderModule({
code: redFragWGSL.replace('{PRESENTATION_FORMAT}', presentationFormat),
}),
targets: [
{
format: presentationFormat,
},
],
},
primitive: {
topology: 'triangle-list',
},
});
const renderPassDescriptor = {
colorAttachments: [
{
view: dummyView,
clearValue: [0, 0, 0, 1],
loadOp: 'clear',
storeOp: 'store',
},
],
};
const commandEncoder = device.createCommandEncoder();
const passEncoder = commandEncoder.beginRenderPass(renderPassDescriptor);
passEncoder.setBindGroup(0, bindGroup);
passEncoder.setPipeline(pipeline);
passEncoder.draw(3);
passEncoder.end();
device.queue.submit([commandEncoder.finish()]);
await device.queue.onSubmittedWorkDone();
requestAnimationFrame(() => {
requestAnimationFrame(() => document.documentElement.className = '');
});
} catch (error) {
console.error(error);
document.getElementById('canvas').style.display = 'none';
document.body.append(error.toString());
document.documentElement.className = '';
}
})();
</script>
</html>
|
