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
|
<!--
/*
** Copyright (c) 2013 The Khronos Group Inc.
**
** Permission is hereby granted, free of charge, to any person obtaining a
** copy of this software and/or associated documentation files (the
** "Materials"), to deal in the Materials without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Materials, and to
** permit persons to whom the Materials are 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 Materials.
**
** THE MATERIALS ARE 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
** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
*/
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL OES_texture_half_float Conformance Tests</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"></script>
</head>
<body>
<div id="description"></div>
<canvas id="canvas" style="width: 50px; height: 50px;"> </canvas>
<canvas id="canvas2d" style="width: 50px; height: 50px;"> </canvas>
<div id="console"></div>
<script id="testFragmentShader" type="x-shader/x-fragment">
precision mediump float;
uniform sampler2D tex;
uniform vec4 subtractor;
varying vec2 texCoord;
void main()
{
vec4 color = texture2D(tex, texCoord);
if (abs(color.r - subtractor.r) +
abs(color.g - subtractor.g) +
abs(color.b - subtractor.b) +
abs(color.a - subtractor.a) < 8.0) {
gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);
} else {
gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
}
}
</script>
<!-- Shaders for testing half-floating-point render targets -->
<script id="floatingPointFragmentShader" type="x-shader/x-fragment">
void main()
{
gl_FragColor = vec4(10000.0, 10000.0, 10000.0, 10000.0);
}
</script>
<script>
"use strict"
description("This test verifies the functionality of OES_texture_half_float with null/non-null ArrayBufferView");
debug("");
var wtu = WebGLTestUtils;
var canvas = document.getElementById("canvas");
var colorCanvas = document.getElementById("canvas2d");
colorCanvas.width = 2;
colorCanvas.height = 2;
var ctx = colorCanvas.getContext("2d");
ctx.fillStyle = "rgb(255,0,0)";
ctx.fillRect(0, 0, 2, 2);
var gl = wtu.create3DContext(canvas);
// This constant must be defined in order to run the texture creation test without the extension enabled.
var halfFloatOESEnum = 0x8D61;
var ext = null;
if (!gl) {
testFailed("WebGL context does not exists");
} else {
testPassed("WebGL context exists");
// Verify that allocation of texture fails if extension is not enabled
runTextureCreationTest(false);
ext = gl.getExtension("OES_texture_half_float")
if (!ext) {
testPassed("No OES_texture_half_float support. This is legal");
} else {
testPassed("Successfully enabled OES_texture_half_float extension");
var program = wtu.setupTexturedQuad(gl);
// Check if creation of texture succeed's with various formats and null ArrayBufferView
var formats = [
{ format: gl.RGBA, expected: [255, 0, 0, 255], },
{ format: gl.RGB, expected: [255, 0, 0, 255], },
{ format: gl.LUMINANCE, expected: [255, 255, 255, 255], },
{ format: gl.ALPHA, expected: [ 0, 0, 0, 255], },
{ format: gl.LUMINANCE_ALPHA, expected: [255, 255, 255, 255], },
];
formats.forEach(function(f) {
runTextureCreationTest(true, f.format, null, f.expected);
});
// Texture creation should fail when passed with non-null, non-Uint16 ArrayBufferView
formats.forEach(function(f) {
var width = 2;
var height = 2;
var format = f.format;
// Float32Array
var float32Data = new Float32Array(width * height * getNumberOfChannels(format));
for (var ii = 0; ii < float32Data.length; ii++) {
float32Data[ii] = 1000;
}
runTextureCreationTest(true, format, float32Data, null);
// Int16Array
var int16Data = new Int16Array(width * height * getNumberOfChannels(format));
for (var ii = 0; ii < int16Data.length; ii++) {
int16Data[ii] = 1000;
}
runTextureCreationTest(true, format, int16Data, null);
});
// Test that Uint16 encoded half float values can be used as texture data.
// First test that values in the 0-1 range can be written and read.
var halfFloatOneThird = 0x3555; // Half float 1/3
var uint16Formats = [
{ format: gl.RGBA, expected: [85, 85, 85, 85], },
{ format: gl.RGB, expected: [85, 85, 85, 255], },
{ format: gl.LUMINANCE, expected: [85, 85, 85, 255], },
{ format: gl.ALPHA, expected: [ 0, 0, 0, 85], },
{ format: gl.LUMINANCE_ALPHA, expected: [85, 85, 85, 85], },
];
uint16Formats.forEach(function(f) {
var width = 2;
var height = 2;
var format = f.format;
var uint16Data = new Uint16Array(width * height * getNumberOfChannels(format));
for (var ii = 0; ii < uint16Data.length; ii++) {
uint16Data[ii] = halfFloatOneThird;
}
runTextureCreationTest(true, format, uint16Data, f.expected);
});
// Next check that values outside the 0-1 range can be written.
var halfFloatTenK = 0x70E2; // Half float 10000
var uint16Formats2 = [
{ format: gl.RGBA, subtractor: [10000, 10000, 10000, 10000], },
{ format: gl.RGB, subtractor: [10000, 10000, 10000, 1], },
];
uint16Formats2.forEach(function(f) {
var width = 2;
var height = 2;
var format = f.format;
var uint16Data = new Uint16Array(width * height * getNumberOfChannels(format));
for (var ii = 0; ii < uint16Data.length; ii++) {
uint16Data[ii] = halfFloatTenK;
}
runRenderTest(format, f.subtractor, uint16Data);
});
// Check if attaching texture as FBO target succeeds (Not mandatory)
runRenderTest(gl.RGBA, [10000, 10000, 10000, 10000], null);
runRenderTest(gl.RGB, [10000, 10000, 10000, 1], null);
runFramebufferTest();
// Check of getExtension() returns same object
runUniqueObjectTest();
}
}
function getNumberOfChannels(format)
{
if (format == gl.RGBA)
return 4;
else if (format == gl.RGB)
return 3;
else if (format == gl.LUMINANCE || format == gl.ALPHA)
return 1;
else if (format == gl.LUMINANCE_ALPHA)
return 2;
}
function getFormatName(format)
{
if (format == gl.RGBA)
return "RGBA";
else if (format == gl.RGB)
return "RGB";
else if (format == gl.LUMINANCE)
return "LUMINANCE";
else if (format == gl.ALPHA)
return "ALPHA";
else if (format == gl.LUMINANCE_ALPHA)
return "LUMINANCE_ALPHA";
}
function getTypeName(type) {
if (type === gl.UNSIGNED_BYTE)
return "UNSIGNED_BYTE";
else if (type === ext.HALF_FLOAT_OES)
return "HALF_FLOAT_OES";
else if (type === gl.UNSIGNED_SHORT_4_4_4_4)
return "UNSIGNED_SHORT_4_4_4_4";
else if (type === gl.UNSIGNED_SHORT_5_5_5_1)
return "UNSIGNED_SHORT_5_6_5";
else if (type === gl.FLOAT)
return "FLOAT";
}
function allocateTexture()
{
var texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
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);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "texture parameter setup should succeed");
return texture;
}
function runTextureCreationTest(extensionEnabled, opt_format, opt_data, opt_expected)
{
var format = opt_format || gl.RGBA;
var data = opt_data || null;
var expectSuccess = true;
if (!extensionEnabled || !opt_expected)
expectSuccess = false;
debug("Testing texture creation with extension " + (extensionEnabled ? "enabled" : "disabled") +
", format " + getFormatName(format) + ", and data " + (data ? "non-null" : "null") +
". Expect " + (expectSuccess ? "Success" : "Failure"));
var texture = allocateTexture();
var width = 2;
var height = 2;
gl.texImage2D(gl.TEXTURE_2D, 0, format, width, height, 0, format, halfFloatOESEnum, data);
if(!extensionEnabled) {
wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "Half floating point texture must be disallowed if OES_texture_half_float isn't enabled");
return;
} else if (!opt_expected) {
wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "Half floating point texture allocation must be disallowed when ArrayBufferView is not-null and not-Uint16");
return;
} else {
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Half floating point texture allocation should succeed if OES_texture_half_float is enabled");
if (!data) {
gl.texImage2D(gl.TEXTURE_2D, 0, format, format, halfFloatOESEnum, colorCanvas);
}
wtu.clearAndDrawUnitQuad(gl);
wtu.checkCanvas(gl, opt_expected);
// Check that linear fails.
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
wtu.clearAndDrawUnitQuad(gl);
wtu.checkCanvas(gl, [0, 0, 0, 255], "should be black");
}
}
function checkRenderingResults()
{
wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green");
}
function runRenderTest(format, subtractor, data)
{
var formatString = wtu.glEnumToString(gl, format);
debug("");
if (!data) {
debug("Testing half floating point " + formatString + " render target");
} else {
debug("Testing half floating point " + formatString + " from a Uint16Array");
}
var texture = allocateTexture();
var width = 2;
var height = 2;
gl.texImage2D(gl.TEXTURE_2D, 0, format, width, height, 0, format, ext.HALF_FLOAT_OES, data);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Half floating point texture allocation should succeed if OES_texture_half_float is enabled");
if (!data) {
// Try to use this texture as render target
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);
gl.bindTexture(gl.TEXTURE_2D, null);
// It is legal for a WebGL implementation exposing the OES_texture_half_float extension to
// support half floating point textures but not as attachments to framebuffer objects.
if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
debug("Half floating point render targets not supported -- this is legal");
return;
}
var renderProgram =
wtu.setupProgram(gl,
[wtu.simpleVertexShader, "floatingPointFragmentShader"],
['vPosition'],
[0]);
wtu.drawUnitQuad(gl);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Rendering to half floating point texture should succeed");
}
// Now sample from the half floating-point texture and verify we got the correct values.
var texturedShaders = [
wtu.simpleTextureVertexShader,
"testFragmentShader"
];
var testProgram =
wtu.setupProgram(gl,
[wtu.simpleTextureVertexShader, "testFragmentShader"],
['vPosition', 'texCoord0'],
[0, 1]);
var quadParameters = wtu.setupUnitQuad(gl, 0, 1);
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.useProgram(testProgram);
gl.uniform4fv(gl.getUniformLocation(testProgram, "subtractor"), subtractor);
wtu.drawUnitQuad(gl);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "rendering from half floating point texture should succeed");
checkRenderingResults();
}
function runUniqueObjectTest()
{
debug("");
debug("Testing that getExtension() returns the same object each time");
ext = null;
gl.getExtension("OES_texture_half_float").myProperty = 2;
webglHarnessCollectGarbage();
shouldBe('gl.getExtension("OES_texture_half_float").myProperty', '2');
}
// Make sure we can call readPixels with the passed in arrayBufferConstructor and that the color
// channels are the ones we expect. If there is a mismatch between the glType and arrayBuffer type,
// fail the test.
function verifyReadPixelsColors(red, green, blue, alpha, alphaRGB, glFormat, glType, arrayBufferConstructor) {
var typeName = getTypeName(glType);
debug(getFormatName(glFormat) + " framebuffer with " + typeName + " readback.");
var arrayBuffer = new arrayBufferConstructor(4);
gl.readPixels(0, 0, 1, 1, gl.RGBA, glType, arrayBuffer);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "readPixels should return NO_ERROR when reading " + typeName + " data.");
assertMsg(arrayBuffer[0] === red, "Red channel should be " + red + " for " + typeName + " readPixels. Received: " + arrayBuffer[0]);
assertMsg(arrayBuffer[1] === green, "Green channel should be " + green + " for " + typeName + " readPixels. Received: " + arrayBuffer[1]);
assertMsg(arrayBuffer[2] === blue, "Blue channel should be " + blue + " for " + typeName + " readPixels. Received: " + arrayBuffer[2]);
if (glFormat === gl.RGBA) {
assertMsg(arrayBuffer[3] === alpha, "Alpha channel should be " + alpha + " for " + typeName + " readPixels. Received: " + arrayBuffer[3]);
} else if (glFormat === gl.RGB) {
assertMsg(arrayBuffer[3] === alphaRGB, "Alpha channel should be " + alphaRGB + " for " + typeName + " readPixels. Received: " + arrayBuffer[3]);
}
// Make sure any arrayBuffer types that are not equal to arrayBufferConstructor fail readPixels.
if (arrayBufferConstructor !== Uint8Array) {
arrayBuffer = new Uint8Array(4);
gl.readPixels(0, 0, 1, 1, gl.RGBA, glType, arrayBuffer);
wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "readPixels should return INVALID_OPERATION when reading mismatched types. " + Uint8Array.toString());
}
if (arrayBufferConstructor !== Float32Array) {
arrayBuffer = new Float32Array(4);
gl.readPixels(0, 0, 1, 1, gl.RGBA, glType, arrayBuffer);
wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "readPixels should return INVALID_OPERATION when reading mismatched types. " + Float32Array.toString());
}
if (arrayBufferConstructor !== Uint16Array) {
arrayBuffer = new Uint16Array(4);
gl.readPixels(0, 0, 1, 1, gl.RGBA, glType, arrayBuffer);
wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "readPixels should return INVALID_OPERATION when reading mismatched types. " + Uint16Array.toString());
}
}
// Verify that half float textures attached to frame buffers function correctly with regard to framebuffer
// completness, IMPLEMENTATION_COLOR_READ_FORMAT/TYPE and readPixels
function runFramebufferTest() {
debug("");
debug("Framebuffer Tests");
var texture = allocateTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, ext.HALF_FLOAT_OES, null);
var fbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);
if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
debug("Half floating point render targets not supported -- this is legal");
return;
}
debug("Ensure non-color-renderable formats [LUMINANCE, LUMINANCE_ALPHA, ALPHA] fail");
var arrayBufferFloatOutput = new Float32Array(4); // 4 color channels
[gl.LUMINANCE, gl.LUMINANCE_ALPHA, gl.ALPHA].forEach(function(badFormat) {
debug(getFormatName(badFormat) + " framebuffer");
gl.texImage2D(gl.TEXTURE_2D, 0, badFormat, 1, 1, 0, badFormat, ext.HALF_FLOAT_OES, null);
shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_INCOMPLETE_ATTACHMENT");
shouldBeNull("gl.getParameter(gl.IMPLEMENTATION_COLOR_READ_FORMAT)");
wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "IMPLEMENTATION_COLOR_READ_FORMAT should fail for incomplete framebuffers.");
shouldBeNull("gl.getParameter(gl.IMPLEMENTATION_COLOR_READ_TYPE)");
wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "IMPLEMENTATION_COLOR_READ_TYPE should fail for incomplete framebuffers.");
gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.FLOAT, arrayBufferFloatOutput);
wtu.glErrorShouldBe(gl, gl.INVALID_FRAMEBUFFER_OPERATION , "readPixels should fail on incomplete framebuffers.");
debug("");
});
debug("Ensure color renderable formats [RGBA, RGB] succeed.");
var arrayBufferHalfFloatInput = new Uint16Array(4); // 4 color channels
arrayBufferHalfFloatInput[0] = 0; // 0 in half float
arrayBufferHalfFloatInput[1] = 0x3400; // 0.25 in half float
arrayBufferHalfFloatInput[2] = 0x3800; // 0.50 in half float
arrayBufferHalfFloatInput[3] = 0x3A00; // 0.75 in half float
[gl.RGBA, gl.RGB].forEach(function(goodFormat) {
debug(getFormatName(goodFormat) + " framebuffer tests");
debug("");
gl.texImage2D(gl.TEXTURE_2D, 0, goodFormat, 1, 1, 0, goodFormat, ext.HALF_FLOAT_OES, arrayBufferHalfFloatInput);
shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
// To avoid GPU idiosyncrasies, dispense with clearing or rendering to the texture. Go straight to readPixels.
// Per the OES_color_buffer_half_float, RGBA/FLOAT should always succeed for readPixels
verifyReadPixelsColors(
0.00, // red
0.25, // green
0.50, // blue
0.75, // alpha
1.0, // alphaRGB
goodFormat,
gl.FLOAT,
Float32Array);
var implementationColorReadFormat = gl.getParameter(gl.IMPLEMENTATION_COLOR_READ_FORMAT);
assertMsg(implementationColorReadFormat === gl.RGBA || implementationColorReadFormat === gl.RGB,
"IMPLEMENTATION_COLOR_READ_FORMAT should be color renderable: RGBA or RGB. Received: " + getFormatName(implementationColorReadFormat));
var implementationColorReadType = gl.getParameter(gl.IMPLEMENTATION_COLOR_READ_TYPE);
// There is nothing in the specifications that keeps the
// implementation color read format and type from being the
// same as the implicitly supported one. For this reason, keep
// gl.FLOAT as one of the valid options.
assertMsg(implementationColorReadType === gl.UNSIGNED_BYTE ||
implementationColorReadType === gl.FLOAT ||
implementationColorReadType === ext.HALF_FLOAT_OES ||
implementationColorReadType === gl.UNSIGNED_SHORT_4_4_4_4 ||
implementationColorReadType === gl.UNSIGNED_SHORT_5_5_5_1 ||
implementationColorReadType === gl.UNSIGNED_SHORT_5_6_5,
"IMPLEMENTATION_COLOR_READ_TYPE must be one of UNSIGNED_BYTE, UNSIGNED_SHORT_4_4_4_4, UNSIGNED_SHORT_5_5_5_1, UNSIGNED_SHORT_5_6_5, FLOAT, or HALF_FLOAT_OES. " +
"Received: " + getTypeName(implementationColorReadType));
// Test the RGBA/HALF_FLOAT_OES combination
if (implementationColorReadFormat === gl.RGBA && implementationColorReadType === ext.HALF_FLOAT_OES) {
verifyReadPixelsColors(
0, // red
0x3400, // green
0x3800, // blue
0x3A00, // alpha
0x3C00, // alphaRGB
goodFormat,
ext.HALF_FLOAT_OES,
Uint16Array);
}
debug("");
});
}
debug("");
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
|
