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
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
|
<!--
Copyright (c) 2012 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../resources/js-test-pre.js"></script>
<script src="../resources/webgl-test.js"></script>
<script src="../resources/webgl-test-utils.js"></script>
<title>WebGL WEBGL_compressed_texture_s3tc Conformance Tests</title>
<style>
img {
border: 1px solid black;
margin-right: 1em;
}
.testimages {
}
.testimages br {
clear: both;
}
.testimages > div {
float: left;
margin: 1em;
}
</style>
</head>
<body>
<div id="description"></div>
<canvas id="canvas" width="8" height="8" style="width: 8px; height: 8px;"></canvas>
<div id="console"></div>
<script>
description("This test verifies the functionality of the WEBGL_compressed_texture_s3tc extension, if it is available.");
debug("");
var img_4x4_rgba_raw = new Uint8Array([
0xff,0x00,0x00,0x69,0x00,0xff,0x00,0xff,0xff,0x00,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0xff,0x00,0x00,0xff,0x00,0xff,0x00,0xff,0xff,0x00,0x00,0xff,0xff,0x00,0x00,0xff,0xff,0x00,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,
]);
var img_4x4_rgb_dxt1 = new Uint8Array([
0xe0,0x07,0x00,0xf8,0x11,0x10,0x15,0x00,
]);
var img_4x4_rgba_dxt1 = new Uint8Array([
0xe0,0x07,0x00,0xf8,0x13,0x10,0x15,0x00,
]);
var img_4x4_rgba_dxt3 = new Uint8Array([
0xf6,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00,0xf8,0xe0,0x07,0x44,0x45,0x40,0x55,
]);
var img_4x4_rgba_dxt5 = new Uint8Array([
0xf6,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00,0xf8,0xe0,0x07,0x44,0x45,0x40,0x55,
]);
var img_8x8_rgba_raw = new Uint8Array([
0xff,0x00,0x00,0x69,0x00,0xff,0x00,0xff,0xff,0x00,0x00,0xff,0x00,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0x00,0x00,0xff,0xff,0xff,0xff,0x00,0xff,0x00,0x00,0xff,0xff,0x00,0xff,0x00,0x69,0x00,0xff,0x00,0xff,0xff,0x00,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0x00,0xff,0xff,0x00,0x00,0xff,0xff,0xff,0xff,0x00,0xff,0x00,0x00,0xff,0xff,0xff,0x00,0x00,0xff,0xff,0x00,0x00,0xff,0xff,0x00,0x00,0xff,0x00,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0x00,0x00,0xff,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0x00,0xff,0xff,0x00,0x00,0xff,0xff,0x00,0x00,0xff,0xff,0x00,0x00,0xff,0xff,0x00,0xff,0x00,0xff,0xff,0x00,0xff,0xff,0x00,0xff,0x00,0xff,0xff,0x00,0xff,0xff,0x00,0x00,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0x00,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0xff,0x00,0xff,0x00,0xff,0xff,0x00,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0x00,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0x00,0x69,0x00,0xff,0x00,0xff,0x00,0xff,0x00,0xff,0xff,0x00,0xff,0xff,0x00,0x00,0xff,0xff,0x00,0x00,0xff,0xff,0x00,0x00,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0x00,0xff,0x69,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0xff,0xff,0x00,0xff,0xff,0xff,
]);
var img_8x8_rgb_dxt1 = new Uint8Array([
0xe0,0x07,0x00,0xf8,0x11,0x10,0x15,0x00,0x1f,0x00,0xe0,0xff,0x11,0x10,0x15,0x00,0xe0,0x07,0x1f,0xf8,0x44,0x45,0x40,0x55,0x1f,0x00,0xff,0x07,0x44,0x45,0x40,0x55,
]);
var img_8x8_rgba_dxt1 = new Uint8Array([
0xe0,0x07,0x00,0xf8,0x13,0x13,0x15,0x00,0x1f,0x00,0xe0,0xff,0x11,0x10,0x15,0x00,0xe0,0x07,0x1f,0xf8,0x44,0x45,0x43,0x57,0x1f,0x00,0xff,0x07,0x44,0x45,0x40,0x55,
]);
var img_8x8_rgba_dxt3 = new Uint8Array([
0xf6,0xff,0xf6,0xff,0xff,0xff,0xff,0xff,0x00,0xf8,0xe0,0x07,0x44,0x45,0x40,0x55,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xe0,0xff,0x1f,0x00,0x44,0x45,0x40,0x55,0xff,0xff,0xff,0xff,0xf6,0xff,0xf6,0xff,0x1f,0xf8,0xe0,0x07,0x11,0x10,0x15,0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x07,0x1f,0x00,0x11,0x10,0x15,0x00,
]);
var img_8x8_rgba_dxt5 = new Uint8Array([
0xff,0x69,0x01,0x10,0x00,0x00,0x00,0x00,0x00,0xf8,0xe0,0x07,0x44,0x45,0x40,0x55,0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0xe0,0xff,0x1f,0x00,0x44,0x45,0x40,0x55,0xff,0x69,0x00,0x00,0x00,0x01,0x10,0x00,0x1f,0xf8,0xe0,0x07,0x11,0x10,0x15,0x00,0xff,0xff,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0x07,0x1f,0x00,0x11,0x10,0x15,0x00,
]);
var wtu = WebGLTestUtils;
var canvas = document.getElementById("canvas");
var gl = wtu.create3DContext(canvas, {antialias: false});
var program = wtu.setupTexturedQuad(gl);
var ext = null;
var vao = null;
var validFormats = {
COMPRESSED_RGB_S3TC_DXT1_EXT : 0x83F0,
COMPRESSED_RGBA_S3TC_DXT1_EXT : 0x83F1,
COMPRESSED_RGBA_S3TC_DXT3_EXT : 0x83F2,
COMPRESSED_RGBA_S3TC_DXT5_EXT : 0x83F3,
};
var name;
var supportedFormats;
if (!gl) {
testFailed("WebGL context does not exist");
} else {
testPassed("WebGL context exists");
// Run tests with extension disabled
runTestDisabled();
// Query the extension and store globally so shouldBe can access it
ext = gl.getExtension("WEBGL_compressed_texture_s3tc");
if (!ext) {
ext = gl.getExtension("WEBKIT_WEBGL_compressed_texture_s3tc");
}
if (!ext) {
testPassed("No WEBGL_compressed_texture_s3tc support -- this is legal");
runSupportedTest(false);
} else {
testPassed("Successfully enabled WEBGL_compressed_texture_s3tc extension");
runSupportedTest(true);
runTestExtension();
}
}
function runSupportedTest(extensionEnabled) {
var supported = gl.getSupportedExtensions();
if (supported.indexOf("WEBGL_compressed_texture_s3tc") >= 0 ||
supported.indexOf("WEBKIT_WEBGL_compressed_texture_s3tc") >= 0) {
if (extensionEnabled) {
testPassed("WEBGL_compressed_texture_s3tc listed as supported and getExtension succeeded");
} else {
testFailed("WEBGL_compressed_texture_s3tc listed as supported but getExtension failed");
}
} else {
if (extensionEnabled) {
testFailed("WEBGL_compressed_texture_s3tc not listed as supported but getExtension succeeded");
} else {
testPassed("WEBGL_compressed_texture_s3tc not listed as supported and getExtension failed -- this is legal");
}
}
}
function runTestDisabled() {
debug("Testing binding enum with extension disabled");
shouldBe('gl.getParameter(gl.COMPRESSED_TEXTURE_FORMATS)', '[]');
}
function formatExists(format, supportedFormats) {
for (var ii = 0; ii < supportedFormats.length; ++ii) {
if (format == supportedFormats[ii]) {
testPassed("supported format " + formatToString(format) + " is exists");
return;
}
}
testFailed("supported format " + formatToString(format) + " does not exist");
}
function formatToString(format) {
for (var p in ext) {
if (ext[p] == format) {
return p;
}
}
return "0x" + format.toString(16);
}
function runTestExtension() {
debug("Testing WEBGL_compressed_texture_s3tc");
// check that all format enums exist.
for (name in validFormats) {
var expected = "0x" + validFormats[name].toString(16);
var actual = "ext['" + name + "']";
shouldBe(actual, expected);
}
supportedFormats = gl.getParameter(gl.COMPRESSED_TEXTURE_FORMATS);
// There should be exactly 4 formats
shouldBe("supportedFormats.length", "4");
// check that all 4 formats exist
for (var name in validFormats.length) {
formatExists(validFormats[name], supportedFormats);
}
// Test each format
testDXT1_RGB();
testDXT1_RGBA();
testDXT3_RGBA();
testDXT5_RGBA();
}
function testDXT1_RGB() {
var tests = [
{ width: 4,
height: 4,
channels: 3,
data: img_4x4_rgb_dxt1,
format: ext.COMPRESSED_RGB_S3TC_DXT1_EXT
},
{ width: 8,
height: 8,
channels: 3,
data: img_8x8_rgb_dxt1,
format: ext.COMPRESSED_RGB_S3TC_DXT1_EXT
}
];
testDXTTextures(tests);
}
function testDXT1_RGBA() {
var tests = [
{ width: 4,
height: 4,
channels: 4,
data: img_4x4_rgba_dxt1,
format: ext.COMPRESSED_RGBA_S3TC_DXT1_EXT
},
{ width: 8,
height: 8,
channels: 4,
data: img_8x8_rgba_dxt1,
format: ext.COMPRESSED_RGBA_S3TC_DXT1_EXT
}
];
testDXTTextures(tests);
}
function testDXT3_RGBA() {
var tests = [
{ width: 4,
height: 4,
channels: 4,
data: img_4x4_rgba_dxt3,
format: ext.COMPRESSED_RGBA_S3TC_DXT3_EXT
},
{ width: 8,
height: 8,
channels: 4,
data: img_8x8_rgba_dxt3,
format: ext.COMPRESSED_RGBA_S3TC_DXT3_EXT
}
];
testDXTTextures(tests);
}
function testDXT5_RGBA() {
var tests = [
{ width: 4,
height: 4,
channels: 4,
data: img_4x4_rgba_dxt5,
format: ext.COMPRESSED_RGBA_S3TC_DXT5_EXT
},
{ width: 8,
height: 8,
channels: 4,
data: img_8x8_rgba_dxt5,
format: ext.COMPRESSED_RGBA_S3TC_DXT5_EXT
}
];
testDXTTextures(tests);
}
function testDXTTextures(tests) {
debug("<hr/>");
for (var ii = 0; ii < tests.length; ++ii) {
testDXTTexture(tests[ii]);
}
}
function uncompressDXTBlock(
destBuffer, destX, destY, destWidth, src, srcOffset, format) {
function make565(src, offset) {
return src[offset + 0] + src[offset + 1] * 256;
}
function make8888From565(c) {
return [
Math.floor(((c >> 11) & 0x1F) * 255 / 31),
Math.floor(((c >> 5) & 0x3F) * 255 / 63),
Math.floor(((c >> 0) & 0x1F) * 255 / 31),
255
];
}
function mix(mult, c0, c1, div) {
var r = [];
for (var ii = 0; ii < c0.length; ++ii) {
r[ii] = Math.floor((c0[ii] * mult + c1[ii]) / div);
}
return r;
}
var isDXT1 = format == ext.COMPRESSED_RGB_S3TC_DXT1_EXT ||
format == ext.COMPRESSED_RGBA_S3TC_DXT1_EXT;
var colorOffset = srcOffset + (isDXT1 ? 0 : 8);
var color0 = make565(src, colorOffset + 0);
var color1 = make565(src, colorOffset + 2);
var c0gtc1 = color0 > color1 || !isDXT1;
var rgba0 = make8888From565(color0);
var rgba1 = make8888From565(color1);
var colors = [
rgba0,
rgba1,
c0gtc1 ? mix(2, rgba0, rgba1, 3) : mix(1, rgba0, rgba1, 2),
c0gtc1 ? mix(2, rgba1, rgba0, 3) : [0, 0, 0, 255]
];
// yea I know there is a lot of math in this inner loop.
// so sue me.
for (var yy = 0; yy < 4; ++yy) {
var pixels = src[colorOffset + 4 + yy];
for (var xx = 0; xx < 4; ++xx) {
var dstOff = ((destY + yy) * destWidth + destX + xx) * 4;
var code = (pixels >> (xx * 2)) & 0x3;
var srcColor = colors[code];
var alpha;
switch (format) {
case ext.COMPRESSED_RGB_S3TC_DXT1_EXT:
alpha = 255;
break;
case ext.COMPRESSED_RGBA_S3TC_DXT1_EXT:
alpha = (code == 3 && !c0gtc1) ? 0 : 255;
break;
case ext.COMPRESSED_RGBA_S3TC_DXT3_EXT:
{
var alpha0 = src[srcOffset + yy * 2 + Math.floor(xx / 2)];
var alpha1 = (alpha0 >> ((xx % 2) * 4)) & 0xF;
alpha = alpha1 | (alpha1 << 4);
}
break;
case ext.COMPRESSED_RGBA_S3TC_DXT5_EXT:
{
var alpha0 = src[srcOffset + 0];
var alpha1 = src[srcOffset + 1];
var alphaOff = Math.floor(yy / 2) * 3 + 2;
var alphaBits =
src[srcOffset + alphaOff + 0] +
src[srcOffset + alphaOff + 1] * 256 +
src[srcOffset + alphaOff + 2] * 65536;
var alphaShift = (yy % 2) * 12 + xx * 3;
var alphaCode = (alphaBits >> alphaShift) & 0x7;
if (alpha0 > alpha1) {
switch (alphaCode) {
case 0:
alpha = alpha0;
break;
case 1:
alpha = alpha1;
break;
default:
alpha = ((8 - alphaCode) * alpha0 + (alphaCode - 1) * alpha1) / 7;
break;
}
} else {
switch (alphaCode) {
case 0:
alpha = alpha0;
break;
case 1:
alpha = alpha1;
break;
case 6:
alpha = 0;
break;
case 7:
alpha = 255;
break;
default:
alpha = ((6 - alphaCode) * alpha0 + (alphaCode - 1) * alpha1) / 5;
break;
}
}
}
break;
default:
throw "bad format";
}
destBuffer[dstOff + 0] = srcColor[0];
destBuffer[dstOff + 1] = srcColor[1];
destBuffer[dstOff + 2] = srcColor[2];
destBuffer[dstOff + 3] = alpha;
}
}
}
function getBlockSize(format) {
var isDXT1 = format == ext.COMPRESSED_RGB_S3TC_DXT1_EXT ||
format == ext.COMPRESSED_RGBA_S3TC_DXT1_EXT;
return isDXT1 ? 8 : 16;
}
function uncompressDXT(width, height, data, format) {
if (width % 4 || height % 4) throw "bad width or height";
var dest = new Uint8Array(width * height * 4);
var blocksAcross = width / 4;
var blocksDown = height / 4;
var blockSize = getBlockSize(format);
for (var yy = 0; yy < blocksDown; ++yy) {
for (var xx = 0; xx < blocksAcross; ++xx) {
uncompressDXTBlock(
dest, xx * 4, yy * 4, width, data,
(yy * blocksAcross + xx) * blockSize, format);
}
}
return dest;
}
function copyRect(data, srcX, srcY, dstX, dstY, width, height, stride) {
var bytesPerLine = width * 4;
var srcOffset = srcX * 4 + srcY * stride;
var dstOffset = dstX * 4 + dstY * stride;
for (; height > 0; --height) {
for (var ii = 0; ii < bytesPerLine; ++ii) {
data[dstOffset + ii] = data[srcOffset + ii];
}
srcOffset += stride;
dstOffset += stride;
}
}
function testDXTTexture(test) {
var data = new Uint8Array(test.data);
var width = test.width;
var height = test.height;
var format = test.format;
var uncompressedData = uncompressDXT(width, height, data, format);
canvas.width = width;
canvas.height = height;
gl.viewport(0, 0, width, height);
debug("testing " + formatToString(format) + " " + width + "x" + height);
var tex = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
gl.compressedTexImage2D(gl.TEXTURE_2D, 0, format, width, height, 0, data);
glErrorShouldBe(gl, gl.NO_ERROR, "uploading compressed texture");
wtu.drawQuad(gl);
compareRect(width, height, test.channels, width, height, uncompressedData, data, format);
gl.compressedTexImage2D(gl.TEXTURE_2D, 0, format, width, height, 1, data);
glErrorShouldBe(gl, gl.INVALID_VALUE, "non 0 border");
gl.compressedTexImage2D(gl.TEXTURE_2D, 0, format, width + 4, height, 0, data);
glErrorShouldBe(gl, gl.INVALID_VALUE, "data size does not match dimensions");
gl.compressedTexImage2D(gl.TEXTURE_2D, 0, format, width, height + 4, 0, data);
glErrorShouldBe(gl, gl.INVALID_VALUE, "data size does not match dimensions");
gl.compressedTexImage2D(gl.TEXTURE_2D, 0, format, width - 4, height, 0, data);
glErrorShouldBe(gl, gl.INVALID_VALUE, "data size does not match dimensions");
gl.compressedTexImage2D(gl.TEXTURE_2D, 0, format, width, height - 4, 0, data);
glErrorShouldBe(gl, gl.INVALID_VALUE, "data size does not match dimensions");
gl.compressedTexImage2D(gl.TEXTURE_2D, 0, format, width - 1, height, 0, data);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "invalid dimensions");
gl.compressedTexImage2D(gl.TEXTURE_2D, 0, format, width - 2, height, 0, data);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "invalid dimensions");
gl.compressedTexImage2D(gl.TEXTURE_2D, 0, format, width, height - 1, 0, data);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "invalid dimensions");
gl.compressedTexImage2D(gl.TEXTURE_2D, 0, format, width, height - 2, 0, data);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "invalid dimensions");
if (width == 4) {
gl.compressedTexImage2D(gl.TEXTURE_2D, 1, format, 1, height, 0, data);
glErrorShouldBe(gl, gl.NO_ERROR, "valid dimensions for level > 0");
gl.compressedTexImage2D(gl.TEXTURE_2D, 1, format, 2, height, 0, data);
glErrorShouldBe(gl, gl.NO_ERROR, "valid dimensions for level > 0");
}
if (height == 4) {
gl.compressedTexImage2D(gl.TEXTURE_2D, 1, format, width, 1, 0, data);
glErrorShouldBe(gl, gl.NO_ERROR, "valid dimensions for level > 0");
gl.compressedTexImage2D(gl.TEXTURE_2D, 1, format, width, 2, 0, data);
glErrorShouldBe(gl, gl.NO_ERROR, "valid dimensions for level > 0");
}
// pick a wrong format that uses the same amount of data.
var wrongFormat;
switch (format) {
case ext.COMPRESSED_RGB_S3TC_DXT1_EXT:
wrongFormat = ext.COMPRESSED_RGBA_S3TC_DXT1_EXT;
break;
case ext.COMPRESSED_RGBA_S3TC_DXT1_EXT:
wrongFormat = ext.COMPRESSED_RGB_S3TC_DXT1_EXT;
break;
case ext.COMPRESSED_RGBA_S3TC_DXT3_EXT:
wrongFormat = ext.COMPRESSED_RGBA_S3TC_DXT5_EXT;
break;
case ext.COMPRESSED_RGBA_S3TC_DXT5_EXT:
wrongFormat = ext.COMPRESSED_RGBA_S3TC_DXT3_EXT;
break;
}
gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, width, height, wrongFormat, data);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "format does not match");
gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, width + 4, height, format, data);
glErrorShouldBe(gl, gl.INVALID_VALUE, "data size does not match dimensions");
gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, width, height + 4, format, data);
glErrorShouldBe(gl, gl.INVALID_VALUE, "data size does not match dimensions");
gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, width - 4, height, format, data);
glErrorShouldBe(gl, gl.INVALID_VALUE, "data size does not match dimensions");
gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, width, height - 4, format, data);
glErrorShouldBe(gl, gl.INVALID_VALUE, "data size does not match dimensions");
gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, width - 1, height, format, data);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "invalid dimensions");
gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, width - 2, height, format, data);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "invalid dimensions");
gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, width, height - 1, format, data);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "invalid dimensions");
gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 0, width, height - 2, format, data);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "invalid dimensions");
var subData = new Uint8Array(data.buffer, 0, getBlockSize(format));
if (width == 8 && height == 8) {
gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 1, 0, 4, 4, format, subData);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "invalid offset");
gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, 0, 1, 4, 4, format, subData);
glErrorShouldBe(gl, gl.INVALID_OPERATION, "invalid offset");
}
var stride = width * 4;
for (var yoff = 0; yoff < height; yoff += 4) {
for (var xoff = 0; xoff < width; xoff += 4) {
copyRect(uncompressedData, 0, 0, xoff, yoff, 4, 4, stride);
gl.compressedTexSubImage2D(gl.TEXTURE_2D, 0, xoff, yoff, 4, 4, format, subData);
glErrorShouldBe(gl, gl.NO_ERROR, "uploading compressed texture");
wtu.drawQuad(gl);
compareRect(width, height, test.channels, width, height, uncompressedData, data, format);
}
}
}
function insertImg(element, caption, img) {
var div = document.createElement("div");
div.appendChild(img);
var label = document.createElement("div");
label.appendChild(document.createTextNode(caption));
div.appendChild(label);
element.appendChild(div);
}
function makeImage(imageWidth, imageHeight, dataWidth, data, alpha) {
var scale = 8;
var c = document.createElement("canvas");
c.width = imageWidth * scale;
c.height = imageHeight * scale;
var ctx = c.getContext("2d");
for (var yy = 0; yy < imageWidth; ++yy) {
for (var xx = 0; xx < imageHeight; ++xx) {
var offset = (yy * dataWidth + xx) * 4;
ctx.fillStyle = "rgba(" +
data[offset + 0] + "," +
data[offset + 1] + "," +
data[offset + 2] + "," +
(alpha ? data[offset + 3] / 255 : 1) + ")";
ctx.fillRect(xx * scale, yy * scale, scale, scale);
}
}
var img = document.createElement("img");
img.src = c.toDataURL();
return img;
}
function compareRect(
actualWidth, actualHeight, actualChannels,
dataWidth, dataHeight, expectedData,
testData, testFormat) {
var actual = new Uint8Array(actualWidth * actualHeight * 4);
gl.readPixels(
0, 0, actualWidth, actualHeight, gl.RGBA, gl.UNSIGNED_BYTE, actual);
var div = document.createElement("div");
div.className = "testimages";
insertImg(div, "expected", makeImage(
actualWidth, actualHeight, dataWidth, expectedData,
actualChannels == 4));
insertImg(div, "actual", makeImage(
actualWidth, actualHeight, actualWidth, actual,
actualChannels == 4));
div.appendChild(document.createElement('br'));
document.getElementById("console").appendChild(div);
var failed = false;
for (var yy = 0; yy < actualHeight; ++yy) {
for (var xx = 0; xx < actualWidth; ++xx) {
var actualOffset = (yy * actualWidth + xx) * 4;
var expectedOffset = (yy * dataWidth + xx) * 4;
var expected = [
expectedData[expectedOffset + 0],
expectedData[expectedOffset + 1],
expectedData[expectedOffset + 2],
(actualChannels == 3 ? 255 : expectedData[expectedOffset + 3])
];
for (var jj = 0; jj < 4; ++jj) {
if (actual[actualOffset + jj] != expected[jj]) {
failed = true;
var was = actual[actualOffset + 0].toString();
for (j = 1; j < 4; ++j) {
was += "," + actual[actualOffset + j];
}
testFailed('at (' + xx + ', ' + yy +
') expected: ' + expected + ' was ' + was);
}
}
}
}
if (!failed) {
testPassed("texture rendered correctly");
}
}
function testPVRTCTextures() {
testFailed("PVRTC test not yet implemented");
}
debug("");
successfullyParsed = true;
</script>
<script>finishTest();</script>
</body>
</html>
|
