1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/canvas/test/webgl-conformance/conformance/misc/uninitialized-test.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,170 @@
1.4 +<!DOCTYPE html>
1.5 +<html>
1.6 +<head>
1.7 +<meta charset="utf-8">
1.8 +<title>WebGL Uninitialized GL Resources Tests</title>
1.9 +<link rel="stylesheet" href="../../resources/js-test-style.css"/>
1.10 +<script src="../../resources/js-test-pre.js"></script>
1.11 +<script src="../resources/webgl-test.js"></script>
1.12 +<script src="../resources/webgl-test-utils.js"></script>
1.13 +</head>
1.14 +<body>
1.15 +<div id="description"></div>
1.16 +<div id="console"></div>
1.17 +<canvas id="canvas" width="2" height="2"> </canvas>
1.18 +<script>
1.19 +description("Tests to check user code cannot access uninitialized data from GL resources.");
1.20 +
1.21 +var wtu = WebGLTestUtils;
1.22 +var gl = wtu.create3DContext("canvas");
1.23 +if (!gl)
1.24 + testFailed("Context created.");
1.25 +else
1.26 + testPassed("Context created.");
1.27 +
1.28 +function setupTexture(texWidth, texHeight) {
1.29 + var texture = gl.createTexture();
1.30 + gl.bindTexture(gl.TEXTURE_2D, texture);
1.31 + gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, texWidth, texHeight, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
1.32 +
1.33 + // this can be quite undeterministic so to improve odds of seeing uninitialized data write bits
1.34 + // into tex then delete texture then re-create one with same characteristics (driver will likely reuse mem)
1.35 + // with this trick on r59046 WebKit/OSX I get FAIL 100% of the time instead of ~15% of the time.
1.36 +
1.37 + var badData = new Uint8Array(texWidth * texHeight * 4);
1.38 + for (var i = 0; i < badData.length; ++i)
1.39 + badData[i] = i % 255;
1.40 +
1.41 + gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, texWidth, texHeight, gl.RGBA, gl.UNSIGNED_BYTE, badData);
1.42 + gl.finish(); // make sure it has been uploaded
1.43 +
1.44 + gl.deleteTexture(texture);
1.45 + gl.finish(); // make sure it has been deleted
1.46 +
1.47 + var texture = gl.createTexture();
1.48 + gl.bindTexture(gl.TEXTURE_2D, texture);
1.49 + return texture;
1.50 +}
1.51 +
1.52 +function checkNonZeroPixels(texture, texWidth, texHeight, skipX, skipY, skipWidth, skipHeight, skipR, skipG, skipB, skipA) {
1.53 + gl.bindTexture(gl.TEXTURE_2D, null);
1.54 + var fb = gl.createFramebuffer();
1.55 + gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
1.56 + gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);
1.57 + shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
1.58 +
1.59 + var data = new Uint8Array(texWidth * texHeight * 4);
1.60 + gl.readPixels(0, 0, texWidth, texHeight, gl.RGBA, gl.UNSIGNED_BYTE, data);
1.61 +
1.62 + var k = 0;
1.63 + for (var y = 0; y < texHeight; ++y) {
1.64 + for (var x = 0; x < texWidth; ++x) {
1.65 + var index = (y * texWidth + x) * 4;
1.66 + if (x >= skipX && x < skipX + skipWidth && y >= skipY && y < skipY + skipHeight) {
1.67 + if (data[index] != skipR || data[index + 1] != skipG || data[index + 2] != skipB || data[index + 3] != skipA) {
1.68 + testFailed("non-zero pixel values are wrong at (" + x + ", " + y + "), data was (" +
1.69 + data[index] + "," + data[index + 1] + "," + data[index + 2] + "," + data[index + 3] +
1.70 + ") should have been (" + skipR + "," + skipG + "," + skipB + "," + skipA + ")");
1.71 + return;
1.72 + }
1.73 + } else {
1.74 + for (var i = 0; i < 4; ++i) {
1.75 + if (data[index + i] != 0)
1.76 + k++;
1.77 + }
1.78 + }
1.79 + }
1.80 + }
1.81 + if (k) {
1.82 + testFailed("Found " + k + " non-zero bytes");
1.83 + } else {
1.84 + testPassed("All data initialized");
1.85 + }
1.86 +}
1.87 +
1.88 +var width = 512;
1.89 +var height = 512;
1.90 +
1.91 +debug("");
1.92 +debug("Reading an uninitialized texture (texImage2D) should succeed with all bytes set to 0.");
1.93 +
1.94 +var tex = setupTexture(width, height);
1.95 +gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
1.96 +checkNonZeroPixels(tex, width, height, 0, 0, 0, 0, 0, 0, 0, 0);
1.97 +gl.deleteTexture(tex);
1.98 +gl.finish();
1.99 +glErrorShouldBe(gl, gl.NO_ERROR);
1.100 +
1.101 +debug("");
1.102 +debug("Reading an uninitialized portion of a texture (copyTexImage2D) should succeed with all bytes set to 0.");
1.103 +
1.104 +var tex = setupTexture(width, height);
1.105 +var fbo = gl.createFramebuffer();
1.106 +gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
1.107 +var rbo = gl.createRenderbuffer();
1.108 +gl.bindRenderbuffer(gl.RENDERBUFFER, rbo);
1.109 +var fboWidth = 16;
1.110 +var fboHeight = 16;
1.111 +gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, fboWidth, fboHeight);
1.112 +gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rbo);
1.113 +shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
1.114 +gl.clearColor(1.0, 0.0, 0.0, 1.0);
1.115 +gl.clear(gl.COLOR_BUFFER_BIT);
1.116 +glErrorShouldBe(gl, gl.NO_ERROR);
1.117 +gl.copyTexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 0, 0, width, height, 0);
1.118 +checkNonZeroPixels(tex, width, height, 0, 0, fboWidth, fboHeight, 255, 0, 0, 255);
1.119 +gl.deleteTexture(tex);
1.120 +gl.finish();
1.121 +glErrorShouldBe(gl, gl.NO_ERROR);
1.122 +
1.123 +debug("");
1.124 +debug("Reading an uninitialized portion of a texture (copyTexImage2D with negative x and y) should succeed with all bytes set to 0.");
1.125 +
1.126 +var tex = setupTexture(width, height);
1.127 +var fbo = gl.createFramebuffer();
1.128 +gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
1.129 +var rbo = gl.createRenderbuffer();
1.130 +gl.bindRenderbuffer(gl.RENDERBUFFER, rbo);
1.131 +var fboWidth = 16;
1.132 +var fboHeight = 16;
1.133 +gl.renderbufferStorage(gl.RENDERBUFFER, gl.RGBA4, fboWidth, fboHeight);
1.134 +gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.RENDERBUFFER, rbo);
1.135 +shouldBe("gl.checkFramebufferStatus(gl.FRAMEBUFFER)", "gl.FRAMEBUFFER_COMPLETE");
1.136 +gl.clearColor(1.0, 0.0, 0.0, 1.0);
1.137 +gl.clear(gl.COLOR_BUFFER_BIT);
1.138 +glErrorShouldBe(gl, gl.NO_ERROR);
1.139 +var x = -8;
1.140 +var y = -8;
1.141 +gl.copyTexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, x, y, width, height, 0);
1.142 +checkNonZeroPixels(tex, width, height, -x, -y, fboWidth, fboHeight, 255, 0, 0, 255);
1.143 +gl.deleteTexture(tex);
1.144 +gl.finish();
1.145 +glErrorShouldBe(gl, gl.NO_ERROR);
1.146 +
1.147 +debug("");
1.148 +debug("Reading an uninitialized portion of a texture (copyTexImage2D from WebGL internal fbo) should succeed with all bytes set to 0.");
1.149 +
1.150 +var tex = setupTexture(width, height);
1.151 +gl.bindFramebuffer(gl.FRAMEBUFFER, null);
1.152 +gl.clearColor(0.0, 1.0, 0.0, 0.0);
1.153 +gl.clear(gl.COLOR_BUFFER_BIT);
1.154 +glErrorShouldBe(gl, gl.NO_ERROR);
1.155 +gl.copyTexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 0, 0, width, height, 0);
1.156 +checkNonZeroPixels(tex, width, height, 0, 0, gl.canvas.width, gl.canvas.height, 0, 255, 0, 0);
1.157 +gl.deleteTexture(tex);
1.158 +gl.finish();
1.159 +glErrorShouldBe(gl, gl.NO_ERROR);
1.160 +
1.161 +//TODO: uninitialized vertex array buffer
1.162 +//TODO: uninitialized vertex elements buffer
1.163 +//TODO: uninitialized framebuffer? (implementations would need to do a GL clear at first binding?)
1.164 +//TODO: uninitialized renderbuffer? (implementations would need to do a GL clear at first binding?)
1.165 +//TODO: uninitialized uniform arrays?
1.166 +
1.167 +debug("");
1.168 +successfullyParsed = true;
1.169 +</script>
1.170 +<script>finishTest();</script>
1.171 +</body>
1.172 +</html>
1.173 +
