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
|
/*
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
*/
function generateTest(internalFormat, pixelFormat, pixelType, prologue, resourcePath, defaultContextVersion) {
var wtu = WebGLTestUtils;
var tiu = TexImageUtils;
var gl = null;
var successfullyParsed = false;
var realRedColor = [255, 0, 0];
var realGreenColor = [0, 255, 0];
var realBlueColor = [0, 0, 255];
var realCyanColor = [0, 255, 255];
var redColor = realRedColor;
var greenColor = realGreenColor;
var blueColor = realBlueColor;
var cyanColor = realCyanColor;
function init()
{
description('Verify texImage2D and texSubImage2D code paths taking a sub-rectangle of a canvas (' + internalFormat + '/' + pixelFormat + '/' + pixelType + ')');
// Set the default context version while still allowing the webglVersion URL query string to override it.
wtu.setDefault3DContextVersion(defaultContextVersion);
// The sub-rectangle tests only apply to WebGL 2.0 for the
// time being, though the tests for the WebGL 1.0
// format/internal format/type combinations are generated into
// conformance/textures/.
if (wtu.getDefault3DContextVersion() < 2) {
debug('Test only applies to WebGL 2.0');
finishTest();
return;
}
gl = wtu.create3DContext("example", { preserveDrawingBuffer: true });
if (!prologue(gl)) {
finishTest();
return;
}
switch (gl[pixelFormat]) {
case gl.RED:
case gl.RED_INTEGER:
greenColor = [0, 0, 0];
blueColor = [0, 0, 0];
cyanColor = [0, 0, 0];
break;
case gl.RG:
case gl.RG_INTEGER:
blueColor = [0, 0, 0];
cyanColor = [0, 255, 0];
break;
case gl.LUMINANCE:
case gl.LUMINANCE_ALPHA:
redColor = [255, 255, 255];
greenColor = [0, 0, 0];
blueColor = [0, 0, 0];
cyanColor = [0, 0, 0];
break;
case gl.ALPHA:
redColor = [0, 0, 0];
greenColor = [0, 0, 0];
blueColor = [0, 0, 0];
cyanColor = [0, 0, 0];
break;
default:
break;
}
gl.clearColor(0,0,0,1);
gl.clearDepth(1);
gl.disable(gl.BLEND);
var canvas2d = document.createElement('canvas');
runTest(canvas2d, setupSourceCanvas2D, '2D-rendered canvas');
var canvasWebGL = document.createElement('canvas');
runTest(canvasWebGL, setupSourceCanvasWebGL, 'WebGL-rendered canvas');
finishTest();
}
function fillStyle2D(ctx, color) {
ctx.fillStyle = 'rgb(' + color[0] + ', ' + color[1] + ', ' + color[2] + ')';
}
function setupSourceCanvas2D(canvas) {
var width = canvas.width;
var height = canvas.height;
var halfWidth = Math.floor(width / 2);
var halfHeight = Math.floor(height / 2);
var ctx = canvas.getContext('2d');
// Always use the same pattern for this test: four quadrants:
// red green
// blue cyan
// Handle odd-sized canvases
fillStyle2D(ctx, realRedColor);
ctx.fillRect(0, 0, halfWidth, halfHeight);
fillStyle2D(ctx, realGreenColor);
ctx.fillRect(halfWidth, 0, width - halfWidth, halfHeight);
fillStyle2D(ctx, realBlueColor);
ctx.fillRect(0, halfHeight, halfWidth, height - halfHeight);
fillStyle2D(ctx, realCyanColor);
ctx.fillRect(halfWidth, halfHeight, width - halfWidth, height - halfHeight);
}
function clearColorWebGL(ctx, color) {
ctx.clearColor(color[0] / 255.0, color[1] / 255.0, color[2] / 255.0, 1.0);
ctx.clear(ctx.COLOR_BUFFER_BIT);
}
function setupSourceCanvasWebGL(canvas) {
var width = canvas.width;
var height = canvas.height;
var halfWidth = Math.floor(width / 2);
var halfHeight = Math.floor(height / 2);
var ctx = canvas.getContext('webgl');
// Always use the same pattern for this test: four quadrants:
// red green
// blue cyan
// Handle odd-sized canvases
ctx.viewport(0, 0, width, height);
ctx.enable(ctx.SCISSOR_TEST);
// OpenGL origin is lower-left
ctx.scissor(0, 0, halfWidth, halfHeight);
clearColorWebGL(ctx, realBlueColor);
ctx.scissor(halfWidth, 0, width - halfWidth, halfHeight);
clearColorWebGL(ctx, realCyanColor);
ctx.scissor(0, halfHeight, halfWidth, height - halfHeight);
clearColorWebGL(ctx, realRedColor);
ctx.scissor(halfWidth, halfHeight, width - halfWidth, height - halfHeight);
clearColorWebGL(ctx, realGreenColor);
}
function runOneIteration(sourceDescription, useTexSubImage2D, flipY,
canvas, canvasSize, canvasSetupFunction,
sourceSubRectangle, expected,
bindingTarget, program)
{
sourceSubRectangleString = '';
if (sourceSubRectangle) {
sourceSubRectangleString = ', sourceSubRectangle=' + sourceSubRectangle;
}
debug('');
debug('Testing ' + sourceDescription + ' with ' +
(useTexSubImage2D ? 'texSubImage2D' : 'texImage2D') +
', flipY=' + flipY +
', bindingTarget=' + (bindingTarget == gl.TEXTURE_2D ? 'TEXTURE_2D' : 'TEXTURE_CUBE_MAP') +
sourceSubRectangleString);
var loc;
if (bindingTarget == gl.TEXTURE_CUBE_MAP) {
loc = gl.getUniformLocation(program, "face");
}
// Initialize the contents of the source canvas.
var width = canvasSize[0];
var height = canvasSize[1];
var halfWidth = Math.floor(width / 2);
var halfHeight = Math.floor(height / 2);
canvas.width = width;
canvas.height = height;
canvasSetupFunction(canvas);
// Upload the source canvas to the texture and draw it to a quad.
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
// Enable writes to the RGBA channels
gl.colorMask(1, 1, 1, 0);
var texture = gl.createTexture();
// Bind the texture to texture unit 0
gl.bindTexture(bindingTarget, texture);
// Set up texture parameters
gl.texParameteri(bindingTarget, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(bindingTarget, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
// Set up pixel store parameters
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, flipY);
gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, false);
wtu.failIfGLError(gl, 'gl.pixelStorei(gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, gl.NONE);');
var targets = [gl.TEXTURE_2D];
if (bindingTarget == gl.TEXTURE_CUBE_MAP) {
targets = [gl.TEXTURE_CUBE_MAP_POSITIVE_X,
gl.TEXTURE_CUBE_MAP_NEGATIVE_X,
gl.TEXTURE_CUBE_MAP_POSITIVE_Y,
gl.TEXTURE_CUBE_MAP_NEGATIVE_Y,
gl.TEXTURE_CUBE_MAP_POSITIVE_Z,
gl.TEXTURE_CUBE_MAP_NEGATIVE_Z];
}
// In this test, this is always specified. It's currently WebGL 2.0-specific.
gl.pixelStorei(gl.UNPACK_SKIP_PIXELS, sourceSubRectangle[0]);
gl.pixelStorei(gl.UNPACK_SKIP_ROWS, sourceSubRectangle[1]);
// Upload the image into the texture
var uploadWidth = sourceSubRectangle[2];
var uploadHeight = sourceSubRectangle[3];
for (var tt = 0; tt < targets.length; ++tt) {
if (useTexSubImage2D) {
// Initialize the texture to black first
gl.texImage2D(targets[tt], 0, gl[internalFormat],
uploadWidth, uploadHeight, 0,
gl[pixelFormat], gl[pixelType], null);
gl.texSubImage2D(targets[tt], 0, 0, 0,
uploadWidth, uploadHeight,
gl[pixelFormat], gl[pixelType], canvas);
} else {
gl.texImage2D(targets[tt], 0, gl[internalFormat],
uploadWidth, uploadHeight, 0,
gl[pixelFormat], gl[pixelType], canvas);
}
}
gl.pixelStorei(gl.UNPACK_SKIP_PIXELS, 0);
gl.pixelStorei(gl.UNPACK_SKIP_ROWS, 0);
// The tests are constructed to upload a single solid color
// out of the canvas.
var outputCanvasWidth = gl.drawingBufferWidth;
var outputCanvasHeight = gl.drawingBufferHeight;
for (var tt = 0; tt < targets.length; ++tt) {
if (bindingTarget == gl.TEXTURE_CUBE_MAP) {
gl.uniform1i(loc, targets[tt]);
}
// Draw the triangles
wtu.clearAndDrawUnitQuad(gl, [0, 0, 0, 255]);
var msg = 'should be ' + expected;
wtu.checkCanvasRect(gl, 0, 0, outputCanvasWidth, outputCanvasHeight, expected, msg);
}
}
function runTest(canvas, canvasSetupFunction, sourceDescription)
{
var program = tiu.setupTexturedQuad(gl, internalFormat);
runTestOnBindingTarget(gl.TEXTURE_2D, program, canvas, canvasSetupFunction, sourceDescription);
program = tiu.setupTexturedQuadWithCubeMap(gl, internalFormat);
runTestOnBindingTarget(gl.TEXTURE_CUBE_MAP, program, canvas, canvasSetupFunction, sourceDescription);
wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no errors");
}
function runTestOnBindingTarget(bindingTarget, program, canvas, canvasSetupFunction, sourceDescription) {
var cases = [
// Small canvas cases. Expected that these won't be
// GPU-accelerated in most browsers' implementations.
{ expected: redColor, flipY: false, size: [2, 2], subRect: [0, 0, 1, 1] },
{ expected: greenColor, flipY: false, size: [2, 2], subRect: [1, 0, 1, 1] },
{ expected: blueColor, flipY: false, size: [2, 2], subRect: [0, 1, 1, 1] },
{ expected: cyanColor, flipY: false, size: [2, 2], subRect: [1, 1, 1, 1] },
{ expected: redColor, flipY: true, size: [2, 2], subRect: [0, 1, 1, 1] },
{ expected: greenColor, flipY: true, size: [2, 2], subRect: [1, 1, 1, 1] },
{ expected: blueColor, flipY: true, size: [2, 2], subRect: [0, 0, 1, 1] },
{ expected: cyanColor, flipY: true, size: [2, 2], subRect: [1, 0, 1, 1] },
// Larger canvas cases. Expected that these will be
// GPU-accelerated in most browsers' implementations.
// Changes will be gladly accepted to trigger more
// browsers' heuristics to accelerate these canvases.
{ expected: redColor, flipY: false, size: [384, 384], subRect: [ 0, 0, 192, 192] },
{ expected: greenColor, flipY: false, size: [384, 384], subRect: [192, 0, 192, 192] },
{ expected: blueColor, flipY: false, size: [384, 384], subRect: [ 0, 192, 192, 192] },
{ expected: cyanColor, flipY: false, size: [384, 384], subRect: [192, 192, 192, 192] },
{ expected: blueColor, flipY: true, size: [384, 384], subRect: [ 0, 0, 192, 192] },
{ expected: cyanColor, flipY: true, size: [384, 384], subRect: [192, 0, 192, 192] },
{ expected: redColor, flipY: true, size: [384, 384], subRect: [ 0, 192, 192, 192] },
{ expected: greenColor, flipY: true, size: [384, 384], subRect: [192, 192, 192, 192] },
];
for (var i in cases) {
runOneIteration(sourceDescription, false, cases[i].flipY,
canvas, cases[i].size, canvasSetupFunction,
cases[i].subRect,
cases[i].expected, bindingTarget, program);
runOneIteration(sourceDescription, true, cases[i].flipY,
canvas, cases[i].size, canvasSetupFunction,
cases[i].subRect,
cases[i].expected, bindingTarget, program);
}
}
return init;
}
|
