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
|
<!--
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.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL BlitFramebuffer 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>
<canvas id="example" width="8" height="8"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
var wtu = WebGLTestUtils;
description("This test verifies the functionality of blitFramebuffer when src/dst region are out-of-bounds.");
var gl = wtu.create3DContext("example", undefined, 2);
function checkPixel(color, expectedColor) {
var tolerance = 3;
return (Math.abs(color[0] - expectedColor[0]) <= tolerance &&
Math.abs(color[1] - expectedColor[1]) <= tolerance &&
Math.abs(color[2] - expectedColor[2]) <= tolerance &&
Math.abs(color[3] - expectedColor[3]) <= tolerance);
}
function blitframebuffer_filter_outofbounds(readbufferFormat, drawbufferFormat, filter) {
debug("");
debug("blitting pixels out-of-bounds, read buffer format is: " + wtu.glEnumToString(gl, readbufferFormat) + ", draw buffer format is: " + wtu.glEnumToString(gl, drawbufferFormat) + ", filter is: " + wtu.glEnumToString(gl, filter));
// Initiate data to read framebuffer
var size = 8;
var uint_read = new Uint8Array(size * size * 4);
var color = 0x20;
for (var ii = 0; ii < size * size * 4; ii += 4) {
for (var jj = 0; jj < 3; ++jj) {
uint_read[ii + jj] = color;
}
uint_read[ii + 3] = 0xff;
}
// Create read framebuffer and feed data to read buffer
// Read buffer may have srgb image
var tex_read = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex_read);
gl.texImage2D(gl.TEXTURE_2D, 0, readbufferFormat, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, uint_read);
var fbo_read = gl.createFramebuffer();
gl.bindFramebuffer(gl.READ_FRAMEBUFFER, fbo_read);
gl.framebufferTexture2D(gl.READ_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex_read, 0);
// Create draw framebuffer. Color in draw buffer is initialized to 0.
// Draw buffer may have srgb image
var tex_draw = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, tex_draw);
gl.texImage2D(gl.TEXTURE_2D, 0, drawbufferFormat, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
var fbo_draw = gl.createFramebuffer();
gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, fbo_draw);
gl.framebufferTexture2D(gl.DRAW_FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex_draw, 0);
if (gl.checkFramebufferStatus(gl.READ_FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE) {
// Blit read framebuffer to the image in draw framebuffer.
var tests = [
// [srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1]
{ args: [-2, -2, 4, 4, 1, 1, 4, 4], changedDstRect: [2, 2, 4, 4], desc: 'only src region is out-of-bounds, dst region has different width/height as src region.'},
{ args: [-2, -2, 4, 4, 1, 1, 7, 7], changedDstRect: [3, 3, 7, 7], desc: 'only src region is out-of-bounds, dst region has the same width/height as src region.'},
{ args: [0, 0, 6, 6, 7, 7, 10, 10], changedDstRect: [7, 7, 8, 8], desc: 'only dst region is out-of-bounds, dst region has different width/height as src region after dst region is clipped to the bounds of draw buffer.'},
{ args: [0, 0, 6, 6, 4, 4, 10, 10], changedDstRect: [4, 4, 8, 8], desc: 'only dst region is out-of-bounds, dst region has the same width/height as src region after dst region is clipped to the bounds of draw buffer.'},
{ args: [-2, -2, 4, 4, 7, 7, 10, 10], changedDstRect: [8, 8, 8, 8], desc: 'both src and dst region are out-of-bounds, dst region has different width/height as src region after dst region is clipped to the bounds of draw buffer.'},
{ args: [-2, -2, 4, 4, 4, 4, 10, 10], changedDstRect: [6, 6, 8, 8], desc: 'both src and dst region are out-of-bounds, dst region has the same width/height as src region after dst region is clipped to the bounds of draw buffer.'},
{ args: [-2, -2, 4, 4, 2, 2, 10, 10], changedDstRect: [2 + 2/6*8, 2 + 2/6*8, 8, 8], desc: 'both src and dst region are out-of-bounds. There are some dst pixels (x and y are within [4, 8] , and x or y equals to 4) whose corresponding src pixels are partially inside and partially outside the real sampling area of the src region (the real sampling area is [0, 0, 4, 4]). But the centers of such src pixels are lying outside the real sampling area.'},
{ args: [-2, -2, 4, 4, 3, 3, 10, 10], changedDstRect: [5, 5, 8, 8], desc: 'both src and dst region are out-of-bounds. There are some dst pixels (x and y are within [4, 7] , and x or y equals to 5) whose corresponding src pixels are partially inside and partially outside the real sampling area of the src region (the real sampling area is [0, 0, 4, 4]). But the centers of such src pixels are lying inside the real sampling area.'},
{ args: [-2, -2, 4, 4, 10, 10, 2, 2], changedDstRect: [2, 2, 7, 7], desc: 'both src and dst region are out-of-bounds, and the dst coordinates are reversed. There are some dst pixels (x and y are within [2, 7] , and x or y equals to 7) whose corresponding src pixels are partially inside and partially outside the real sampling area of the src region (the real sampling area is [0, 0, 4, 4]). But the centers of such src pixels are lying outside the real sampling area.'},
{ args: [-2, -2, 4, 4, 10, 10, 3, 3], changedDstRect: [3, 3, 8, 8], desc: 'both src and dst region are out-of-bounds, and the dst coordinates are reversed. There are some dst pixels (x and y are within [3, 7] , and x or y equals to 7) whose corresponding src pixels are partially inside and partially outside the read sampling area of the src region (the real sampling area is [0, 0, 4, 4]). But the centers of such src pixels are lying inside the real sampling area.'},
];
var readbufferHasSRGBImage = (readbufferFormat == gl.SRGB8_ALPHA8);
var drawbufferHasSRGBImage = (drawbufferFormat == gl.SRGB8_ALPHA8);
for (const test of tests) {
const args = test.args;
const changedDstRect = test.changedDstRect;
debug("");
debug("Both the read framebuffer and draw framebuffer bounds are [0, 0, 8, 8]");
debug(`Blitting from src region [${args.slice(0, 4)}] to dst region [${args.slice(4, 8)}]`);
debug(`Expects changed dst region of [${changedDstRect}]`);
debug(`Explaination: ${test.desc}`);
gl.bindFramebuffer(gl.READ_FRAMEBUFFER, fbo_read);
gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, fbo_draw);
gl.bindTexture(gl.TEXTURE_2D, tex_draw);
gl.texImage2D(gl.TEXTURE_2D, 0, drawbufferFormat, size, size, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
gl.blitFramebuffer(args[0], args[1], args[2], args[3], args[4], args[5], args[6], args[7], gl.COLOR_BUFFER_BIT, filter);
// Read pixels and check the correctness.
var pixels = new Uint8Array(size * size * 4);
gl.bindFramebuffer(gl.READ_FRAMEBUFFER, fbo_draw);
gl.readPixels(0, 0, size, size, gl.RGBA, gl.UNSIGNED_BYTE, pixels);
for (var ii = 0; ii < size; ++ii) {
for (var jj = 0; jj < size; ++jj) {
var loc = ii * size + jj;
var color = [pixels[loc * 4], pixels[loc * 4 + 1], pixels[loc * 4 + 2], pixels[loc * 4 + 3]];
var expectedColor = [0, 0, 0, 0];
if (ii >= changedDstRect[0] && ii < changedDstRect[2] && jj >= changedDstRect[1] && jj < changedDstRect[3]) {
expectedColor = [0x20, 0x20, 0x20, 0xff];
// We may need to covert the color space for pixels in blit region
if (readbufferHasSRGBImage ^ drawbufferHasSRGBImage) {
if (drawbufferHasSRGBImage) {
expectedColor = wtu.linearToSRGB(expectedColor);
} else {
expectedColor = wtu.sRGBToLinear(expectedColor);
}
}
}
if (checkPixel(color, expectedColor) == true) {
testPassed("pixel at [" + jj + ", " + ii + "] is (" + color + "). It is correct!");
} else {
testFailed("pixel at [" + jj + ", " + ii + "] should be (" + expectedColor + "), but the actual color is (" + color + ")");
}
}
}
}
} else {
testFailed("framebuffer not complete");
}
gl.bindTexture(gl.TEXTURE_2D, null);
gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null);
gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, null);
gl.deleteFramebuffer(fbo_read);
gl.deleteFramebuffer(fbo_draw);
gl.deleteTexture(tex_read);
gl.deleteTexture(tex_draw);
};
if (!gl) {
testFailed("WebGL context does not exist");
} else {
testPassed("WebGL context exists");
var filters = [gl.LINEAR, gl.NEAREST];
for (var ii = 0; ii < filters.length; ++ii) {
blitframebuffer_filter_outofbounds(gl.RGBA8, gl.RGBA8, filters[ii]);
break;
blitframebuffer_filter_outofbounds(gl.RGBA8, gl.SRGB8_ALPHA8, filters[ii]);
blitframebuffer_filter_outofbounds(gl.SRGB8_ALPHA8, gl.RGBA8, filters[ii]);
blitframebuffer_filter_outofbounds(gl.SRGB8_ALPHA8, gl.SRGB8_ALPHA8, filters[ii]);
}
}
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
|
