-
Notifications
You must be signed in to change notification settings - Fork 5
/
multi-canvas.html
446 lines (372 loc) · 14.3 KB
/
multi-canvas.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="css/example.css">
<script src="utils/gl-matrix.js"></script>
<style>
html, body {
overflow: auto;
}
canvas {
margin: 10px;
border: 1px solid red;
border-radius: 10px;
}
</style>
</head>
<!--
The MIT License (MIT)
Copyright (c) 2024 Tarek Sherif
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-->
<body>
<div id="stats">
<div>
CPU Time: <span id="cpu-time"></span>
</div>
<div>
GPU Time: <span id="gpu-time"></span>
</div>
</div>
<script type="module">
import { checkSupport, addDescription, loadImageBitmaps, createCube, xformMatrix, randomRange, getMipLevelCount, generate2DMipmap } from "./utils/utils.js";
import { Timer } from "./utils/Timer.js";
const { mat4 } = glMatrix;
const NUM_CANVASES = 100;
checkSupport();
addDescription(
"Multiple Canvases",
`Rendering to ${NUM_CANVASES} canvases from a single device instance.`,
"multi-canvas.html"
);
(async () => {
//////////////////////////////////////////
// Set up WebGPU adapter, load
// texture image
//////////////////////////////////////////
const [adapter, [image]] = await Promise.all([
navigator.gpu.requestAdapter(),
loadImageBitmaps(["img/webgpu.png"])
]);
const presentationFormat = navigator.gpu.getPreferredCanvasFormat();
////////////////////////////////////
// Set up device and canvas context
////////////////////////////////////
const device = await adapter.requestDevice({
requiredFeatures: adapter.features.has("timestamp-query") ? ["timestamp-query"] : []
});
const timer = new Timer(device);
const cpuTimeDisplay = document.getElementById("cpu-time");
const gpuTimeDisplay = document.getElementById("gpu-time");
////////////////////////////////////////
// Create vertex buffers and load data
////////////////////////////////////////
const cubeData = createCube();
const numVertices = cubeData.positions.length / 3;
const positionBuffer = device.createBuffer({
size: cubeData.positions.byteLength,
usage: GPUBufferUsage.VERTEX | GPUBufferUsage.COPY_DST
});
const normalBuffer = device.createBuffer({
size: cubeData.normals.byteLength,
usage: GPUBufferUsage.VERTEX | GPUBufferUsage.COPY_DST
});
const uvBuffer = device.createBuffer({
size: cubeData.uvs.byteLength,
usage: GPUBufferUsage.VERTEX | GPUBufferUsage.COPY_DST
});
device.queue.writeBuffer(positionBuffer, 0, cubeData.positions);
device.queue.writeBuffer(normalBuffer, 0, cubeData.normals);
device.queue.writeBuffer(uvBuffer, 0, cubeData.uvs);
/////////////////
// Uniform data
/////////////////
const eyePosition = new Float32Array([1, 1, 1]);
const lightPosition = new Float32Array([1, 1, 1]);
////////////////////////////
// Create uniform buffers
////////////////////////////
const fragmentUniformBuffer = device.createBuffer({
size: 32,
usage: GPUBufferUsage.UNIFORM | GPUBufferUsage.COPY_DST
});
device.queue.writeBuffer(fragmentUniformBuffer, 0, eyePosition);
device.queue.writeBuffer(fragmentUniformBuffer, 16, lightPosition);
/////////////////////////////////////////
// Create texture, sampler and load data
/////////////////////////////////////////
const sampler = device.createSampler({
minFilter: "linear",
magFilter: "linear",
mipmapFilter: "linear"
});
const texture = device.createTexture({
size: [image.width, image.height],
format: "rgba8unorm",
mipLevelCount: getMipLevelCount(image.width, image.height),
usage: GPUTextureUsage.TEXTURE_BINDING | GPUTextureUsage.COPY_DST | GPUTextureUsage.RENDER_ATTACHMENT
});
device.queue.copyExternalImageToTexture(
{ source: image, flipY: true },
{ texture },
{
width: image.width,
height: image.height
}
);
generate2DMipmap(device, texture);
///////////////////////////
// Create shader module
///////////////////////////
const cubeShaderModule = device.createShaderModule({
code: `
struct VertexUniforms {
worldMatrix: mat4x4f ,
viewProjectionMatrix: mat4x4f
};
@group(0) @binding(0) var<uniform> vertexUniforms: VertexUniforms;
struct VSOut{
@builtin(position) clipPosition: vec4f,
@location(0) worldPosition: vec3f,
@location(1) normal: vec3f,
@location(2) uv: vec2f
};
@vertex
fn vs(
@location(0) position: vec4f,
@location(1) normal: vec3f,
@location(2) uv: vec2f,
) -> VSOut {
let worldPosition: vec4f = vertexUniforms.worldMatrix * position;
var vsOut: VSOut;
vsOut.clipPosition = vertexUniforms.viewProjectionMatrix * worldPosition;
vsOut.worldPosition = worldPosition.xyz;
vsOut.normal = (vertexUniforms.worldMatrix * vec4f(normal, 0.0)).xyz;
vsOut.uv = uv;
return vsOut;
}
struct FragmentUniforms {
eyePosition: vec4f,
lightPosition: vec4f
};
@group(0) @binding(1) var<uniform> fragmentUniforms: FragmentUniforms;
@group(0) @binding(2) var textureSampler: sampler;
@group(0) @binding(3) var textureData: texture_2d<f32>;
@fragment
fn fs(fsIn: VSOut) -> @location(0) vec4f {
let surfaceColor: vec3f = textureSample(textureData, textureSampler, fsIn.uv).rgb;
let normal: vec3f = normalize(fsIn.normal);
let eyeVec: vec3f = normalize(fragmentUniforms.eyePosition.xyz - fsIn.worldPosition);
let incidentVec: vec3f = normalize(fsIn.worldPosition - fragmentUniforms.lightPosition.xyz);
let lightVec: vec3f = -incidentVec;
let diffuse: f32 = max(dot(lightVec, normal), 0.0);
let highlight: f32 = pow(max(dot(eyeVec, reflect(incidentVec, normal)), 0.0), 100.0);
let ambient: f32 = 0.1;
return vec4f(surfaceColor * (diffuse + highlight + ambient), 1.0);
}
`
});
///////////////////////////
// Create render pipeline
///////////////////////////
const pipeline = device.createRenderPipeline({
layout: 'auto',
vertex: {
module: cubeShaderModule,
entryPoint: "vs",
buffers: [
{
arrayStride: 12,
attributes: [{
shaderLocation: 0,
format: "float32x3",
offset: 0
}]
},
{
arrayStride: 12,
attributes: [{
shaderLocation: 1,
format: "float32x3",
offset: 0
}]
},
{
arrayStride: 8,
attributes: [{
shaderLocation: 2,
format: "float32x2",
offset: 0
}]
}
]
},
fragment: {
module: cubeShaderModule,
entryPoint: "fs",
targets: [{
format: presentationFormat
}]
},
multisample: {
count: 4
},
primitive: {
topology: "triangle-list",
},
depthStencil: {
format: "depth24plus",
depthWriteEnabled: true,
depthCompare: "less"
}
});
const canvases = new Array(NUM_CANVASES).fill(null).map(() => {
const canvas = document.createElement("canvas");
canvas.width = randomRange(100, 300);
canvas.height = randomRange(100, 300);
document.body.appendChild(canvas);
const context = canvas.getContext("webgpu");
context.configure({
device,
format: presentationFormat
});
const projectionMatrix = mat4.create();
const viewMatrix = mat4.create();
const viewProjectionMatrix = mat4.create();
mat4.perspective(projectionMatrix, Math.PI / 2, canvas.width / canvas.height, 0.1, 10.0)
mat4.lookAt(viewMatrix, [1, 1, 1], [0, 0, 0], [0, 1, 0]);
mat4.multiply(viewProjectionMatrix, projectionMatrix, viewMatrix);
const rotation = [
randomRange(0, 2 * Math.PI),
randomRange(0, 2 * Math.PI),
randomRange(0, 2 * Math.PI)
];
const modelMatrix = mat4.create();
xformMatrix(modelMatrix, null, rotation, null);
const vertexUniformBuffer = device.createBuffer({
size: 128,
usage: GPUBufferUsage.UNIFORM | GPUBufferUsage.COPY_DST
});
device.queue.writeBuffer(vertexUniformBuffer, 64, viewProjectionMatrix);
const bindGroup = device.createBindGroup({
layout: pipeline.getBindGroupLayout(0),
entries: [
{
binding: 0,
resource: {
buffer: vertexUniformBuffer
}
},
{
binding: 1,
resource: {
buffer: fragmentUniformBuffer
}
},
{
binding: 2,
resource: sampler
},
{
binding: 3,
resource: texture.createView()
}
]
});
const msaaTexture = device.createTexture({
label: 'msaa texture',
size: [canvas.width, canvas.height],
format: presentationFormat,
usage: GPUTextureUsage.RENDER_ATTACHMENT,
sampleCount: 4
});
const depthTexture = device.createTexture({
size: [canvas.width, canvas.height],
format: "depth24plus",
usage: GPUTextureUsage.RENDER_ATTACHMENT,
sampleCount: 4
});
const renderPassDescriptor = {
colorAttachments: [{
view: msaaTexture.createView(),
resolveTarget: context.getCurrentTexture().createView(),
loadOp: 'clear',
storeOp: 'store',
clearValue: [0, 0, 0, 1]
}],
depthStencilAttachment: {
view: depthTexture.createView(),
depthClearValue: 1,
depthLoadOp: 'clear',
depthStoreOp: "store"
}
};
return {
canvas,
context,
rotation,
modelMatrix,
bindGroup,
vertexUniformBuffer,
msaaTexture,
depthTexture,
renderPassDescriptor
}
});
canvases[0].renderPassDescriptor.timestampWrites = timer.gpuPassDescriptor("frame", Timer.PASS_START);
canvases.at(-1).renderPassDescriptor.timestampWrites = timer.gpuPassDescriptor("frame", Timer.PASS_END);
let lastTime;
requestAnimationFrame(function draw(time) {
timer.cpuTimeStart("frame");
lastTime = lastTime ?? time;
const dt = time - lastTime;
lastTime = time;
const commandEncoder = device.createCommandEncoder();
canvases.forEach(c => {
/////////////////////////
// Update model matrix
/////////////////////////
c.rotation[0] += 0.001 * dt;
c.rotation[1] += 0.002 * dt;
xformMatrix(c.modelMatrix, null, c.rotation, null);
device.queue.writeBuffer(c.vertexUniformBuffer, 0, c.modelMatrix);
c.renderPassDescriptor.colorAttachments[0].resolveTarget = c.context.getCurrentTexture().createView();
const renderPass = commandEncoder.beginRenderPass(c.renderPassDescriptor);
renderPass.setPipeline(pipeline);
// First argument here refers to array index
// in pipeline vertexState.vertexBuffers
renderPass.setVertexBuffer(0, positionBuffer);
renderPass.setVertexBuffer(1, normalBuffer);
renderPass.setVertexBuffer(2, uvBuffer);
// First argument here refers to array index
// in pipeline layout.bindGroupLayouts
renderPass.setBindGroup(0, c.bindGroup);
renderPass.draw(numVertices);
renderPass.end();
});
timer.gpuBeforeSubmit(commandEncoder, ["frame"]);
device.queue.submit([commandEncoder.finish()]);
timer.gpuAfterSubmit(["frame"]);
timer.cpuTimeEnd("frame");
cpuTimeDisplay.innerText = `${timer.cpuTimes["frame"].toFixed(2)}ms`;
gpuTimeDisplay.innerText = timer.hasGPUTimer ? `${timer.gpuTimes["frame"].toFixed(2)}ms` : "N/A";
requestAnimationFrame(draw);
});
})();
</script>
</body>
</html>