-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathindex.html
377 lines (293 loc) · 10.2 KB
/
index.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
<!DOCTYPE html>
<html lang="fr">
<head>
<meta charset="utf-8">
<title>Three.js test</title>
<script type="text/javascript" src="./js/three.min.js"></script>
<script type="text/javascript" src="./js/tools.js"></script>
<script type="text/javascript" src="./js/textureData.js"></script>
<script type="text/javascript">
const RenderWidth = 512;
const RenderHeight = 512;
const RenderSize = RenderWidth * RenderHeight;
const RenderRGBASize = RenderSize * 4;
const OffScreenRenderWidth = 4096;
const OffScreenRenderHeight = 4096;
const OffScreenRenderSample = 4;
const OffScreenRenderSize = OffScreenRenderWidth * OffScreenRenderHeight;
const OffScreenRenderRGBASize = OffScreenRenderSize * 4;
const FOV = 85.0;
/* WebGL related objects */
let g_mainRenderer = null; // Three.js
let g_renderToTexture = null; // Three.js
let g_pixelBufferObject = null; // Pure WebGL
let g_pixelBufferDisplay = null;
/* Local data */
let g_sceneA = null;
let g_sceneB = null;
let g_camera = null;
let g_objects = {};
let g_pixelBuffer = null;
let g_fpsCounter = new FpsCounter();
/* Options */
let g_realTime = false;
let g_usePixelBufferObject = false;
let init = function ()
{
g_mainRenderer = createDefaultFramebuffer();
g_renderToTexture = createRenderToTexture();
const gl = g_mainRenderer.getContext();
g_pixelBuffer = createPixelBuffer(false);
g_pixelBufferObject = createPixelBufferObject(gl);
/* Set the canvas to red. */
let PBODisplay = document.getElementById('pixel-buffer');
PBODisplay.width = RenderWidth;
PBODisplay.height = RenderHeight;
g_pixelBufferDisplay = PBODisplay.getContext('2d');
g_pixelBufferDisplay.fillStyle = '#000000';
g_pixelBufferDisplay.fillRect(0, 0, RenderHeight, RenderWidth);
g_camera = new THREE.PerspectiveCamera(FOV, RenderWidth / RenderHeight, 0.1, 1000);
g_camera.position.z = 1.0;
g_sceneA = new THREE.Scene();
g_objects.texturedCube = createCube(createTexture2D(TextureData));
g_sceneA.add(g_objects.texturedCube);
g_sceneB = new THREE.Scene();
g_objects.finalCube = createCube(g_renderToTexture.texture);
g_sceneB.add(g_objects.finalCube);
let GPUInfo = '';
GPUInfo += gl.getParameter(gl.RENDERER) + '<br />';
GPUInfo += gl.getParameter(gl.VENDOR) + '<br />';
GPUInfo += getUnmaskedInfo(gl).vendor + '<br />';
GPUInfo += getUnmaskedInfo(gl).renderer + '<br />';
document.getElementById('gpu_info').innerHTML = GPUInfo;
/*console.log("36160 == FRAMEBUFFER : %o", 36160 === gl.FRAMEBUFFER);
console.log("6408 == RGBA : %o", 6408 === gl.RGBA);
console.log("5121 == UNSIGNED_BYTE : %o", 5121 === gl.UNSIGNED_BYTE);*/
if ( g_realTime ) {
render();
}
};
let createDefaultFramebuffer = function ()
{
let canvas = document.getElementById('3d-scene');
let mainRenderer = new THREE.WebGLRenderer({canvas: canvas});
mainRenderer.setSize(RenderWidth, RenderHeight);
mainRenderer.autoClear = false;
return mainRenderer;
};
let createRenderToTexture = function ()
{
return new THREE.WebGLRenderTarget(OffScreenRenderWidth, OffScreenRenderHeight, {
wrapS: THREE.ClampToEdgeWrapping,
wrapT: THREE.ClampToEdgeWrapping,
magFilter: THREE.LinearFilter,
minFilter: THREE.LinearFilter,
generateMipmaps: false,
format: THREE.RGBAFormat,
UnsignedByteType: THREE.UnsignedByteType,
anisotropy: 8,
encoding: THREE.LinearEncoding,
depthBuffer: true,
stencilBuffer: false,
samples: OffScreenRenderSample
});
};
let createPixelBufferObject = function (gl)
{
let buffer = gl.createBuffer();
gl.bindBuffer(gl.PIXEL_PACK_BUFFER, buffer);
gl.bufferData(gl.PIXEL_PACK_BUFFER, g_pixelBuffer, gl.DYNAMIC_READ);
gl.bindBuffer(gl.PIXEL_PACK_BUFFER, null);
return buffer;
};
let createPixelBuffer = function (monochrome = true)
{
let pixelBuffer;
if ( monochrome )
{
pixelBuffer = new Uint8ClampedArray(OffScreenRenderSize);
for ( let i = 0; i < OffScreenRenderSize; i++ )
pixelBuffer[i] = rand(0, 255);
}
else
{
pixelBuffer = new Uint8ClampedArray(OffScreenRenderRGBASize);
for ( let i = 0; i < OffScreenRenderRGBASize; i += 4 )
{
pixelBuffer[i] = rand(0, 255);
pixelBuffer[i+1] = rand(0, 255);
pixelBuffer[i+2] = rand(0, 255);
pixelBuffer[i+3] = 255;
}
}
return pixelBuffer;
}
let createTexture2D = function (filename)
{
const texture = new THREE.TextureLoader().load(filename);
texture.wrapS = THREE.RepeatWrapping;
texture.wrapT = THREE.RepeatWrapping;
texture.magFilter = THREE.LinearFilter;
texture.minFilter = THREE.LinearFilter;
texture.anisotropy = 8;
texture.repeat.set(1, 1);
texture.generateMipmaps = true;
return texture;
};
let createCube = function (texture = null)
{
const geometry = new THREE.BoxGeometry(1, 1, 1);
const material = new THREE.MeshBasicMaterial({
color: 0x00ff00,
map: texture
});
return new THREE.Mesh(geometry, material);
};
let transferFramebufferToPixelBufferObject = function (gl, renderTarget = null)
{
if ( renderTarget )
gl.bindFramebuffer(gl.READ_FRAMEBUFFER, g_mainRenderer.properties.get(renderTarget).__webglFramebuffer);
gl.bindBuffer(gl.PIXEL_PACK_BUFFER, g_pixelBufferObject);
gl.readPixels(0, 0, OffScreenRenderWidth, OffScreenRenderHeight, gl.RGBA, gl.UNSIGNED_BYTE, 0);
gl.bindBuffer(gl.PIXEL_PACK_BUFFER, null);
gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null);
};
let readPixelBufferObject = function (gl, useReadPixel = false)
{
gl.bindBuffer(gl.PIXEL_UNPACK_BUFFER, g_pixelBufferObject);
if ( useReadPixel )
gl.readPixels(0, 0, OffScreenRenderWidth, OffScreenRenderHeight, gl.RGBA, gl.UNSIGNED_BYTE, g_pixelBuffer);
else
gl.getBufferSubData(gl.PIXEL_UNPACK_BUFFER, 0, g_pixelBuffer);
gl.bindBuffer(gl.PIXEL_UNPACK_BUFFER, null);
};
let readFramebuffer = function (gl, renderTarget = null)
{
if ( renderTarget )
gl.bindFramebuffer(gl.READ_FRAMEBUFFER, g_mainRenderer.properties.get(renderTarget).__webglFramebuffer);
gl.readPixels(0, 0, OffScreenRenderWidth, OffScreenRenderHeight, gl.RGBA, gl.UNSIGNED_BYTE, g_pixelBuffer);
gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null);
};
let showPixels = function ()
{
console.time("ScaleAndShow");
let imageData = new ImageData(g_pixelBuffer, OffScreenRenderWidth, OffScreenRenderHeight);
g_pixelBufferDisplay.putImageData(scaleImageData(imageData, RenderWidth, RenderHeight), 0, 0);
console.timeEnd("ScaleAndShow");
}
let render = function ()
{
g_fpsCounter.update();
document.getElementById('fps').innerHTML = g_fpsCounter.getCountPerSecond() + ' / ' + g_fpsCounter.getCountPerMinute();
console.time("MainRender");
if ( g_realTime ) {
requestAnimationFrame(render);
}
g_objects.texturedCube.rotation.x += 0.03;
g_objects.texturedCube.rotation.y += 0.03;
g_objects.finalCube.rotation.x -= 0.01;
g_objects.finalCube.rotation.y -= 0.01;
/* Render to off-screen target. */
g_mainRenderer.setRenderTarget(g_renderToTexture, 0, 0);
g_mainRenderer.setClearColor(new THREE.Color(0.5, 0.5, 0.5), 1.0);
g_mainRenderer.clear();
g_mainRenderer.render(g_sceneA, g_camera);
/* Render to default framebuffer. */
g_mainRenderer.setRenderTarget(null, 0, 0);
g_mainRenderer.setClearColor(new THREE.Color(0.65, 0, 0), 1.0);
g_mainRenderer.clear();
g_mainRenderer.render(g_sceneB, g_camera);
/* Get result in pixel buffer */
if ( g_usePixelBufferObject )
{
console.time("VideoToCPU(PBO)");
transferFramebufferToPixelBufferObject(g_mainRenderer.getContext(), g_renderToTexture);
readPixelBufferObject(g_mainRenderer.getContext());
console.timeEnd("VideoToCPU(PBO)");
}
else
{
console.time("VideoToCPU(Framebuffer)");
readFramebuffer(g_mainRenderer.getContext(), g_renderToTexture);
console.timeEnd("VideoToCPU(Framebuffer)");
}
console.timeEnd("MainRender");
console.log("++++++++++++++++++++++++++++++++++++++++++++++++");
};
window.addEventListener('load', function () {
init();
window.addEventListener("keydown", function (keyboardEvent) {
switch ( keyboardEvent.code )
{
case "Enter" :
if ( g_realTime ) {
return;
}
requestAnimationFrame(render);
break;
case "KeyQ" :
if ( g_realTime ) {
g_realTime = false;
}
else
{
g_realTime = true;
render();
}
break;
case "KeyW" :
if ( g_usePixelBufferObject )
{
g_usePixelBufferObject = false;
document.getElementById('mode').innerText = 'Framebuffer';
}
else
{
g_usePixelBufferObject = true;
document.getElementById('mode').innerText = 'PixelBufferObject';
}
break;
case "KeyE" :
showPixels();
break;
}
});
});
</script>
<style>
* {margin:0;padding:0}
</style>
</head>
<body>
<div style="margin:16px">
<div style="width:50%;float:left;overflow: hidden">
<h1>FPS: <span id="fps">0</span></h1>
<h2>Mode: <span id="mode">Framebuffer</span></h2>
</div>
<div style="width:50%;float:right;overflow: hidden">
<h2>GPU information</h2>
<p id="gpu_info"></p>
</div>
<div style="clear:both"></div>
</div>
<hr />
<div style="margin:16px;text-align:center">
<div id="3d-scene-container" style="width:50%;float:left;overflow: hidden;text-align:center">
<p>3D Scene</p>
<canvas id="3d-scene"></canvas>
</div>
<div style="width:50%;float:right;overflow: hidden">
<p>Pixel buffer</p>
<canvas id="pixel-buffer"></canvas>
</div>
<div style="clear:both"></div>
</div>
<hr />
<div style="margin:16px;font-size:21px">
<h2>Keyboard controls</h2>
<p>Press <b>A</b> to start/stop the rendering.</p>
<p>Press <b>Z</b> to switch from framebuffer to PBO reading.</p>
<p>Press <b>E</b> to print current image in "pixel buffer" display.</p>
</div>
</body>
</html>