gl-geterror.html (2892B)
1 <!-- 2 Copyright (c) 2019 The Khronos Group Inc. 3 Use of this source code is governed by an MIT-style license that can be 4 found in the LICENSE.txt file. 5 --> 6 7 <!DOCTYPE html> 8 <html> 9 <head> 10 <meta charset="utf-8"> 11 <title>WebGL get error conformance test.</title> 12 <link rel="stylesheet" href="../../resources/js-test-style.css"/> 13 <script src="../../js/desktop-gl-constants.js"></script> 14 <script src="../../js/js-test-pre.js"></script> 15 <script src="../../js/webgl-test-utils.js"> </script> 16 </head> 17 <body> 18 <canvas id="example" width="1" height="1" style="width: 256px; height: 48px;"></canvas> 19 <div id="description"></div><div id="console"></div> 20 <script> 21 "use strict"; 22 description("Test getError."); 23 var wtu = WebGLTestUtils; 24 var gl = wtu.create3DContext("example"); 25 var tex = gl.createTexture(); 26 gl.bindTexture(gl.TEXTURE_2D, tex); 27 28 gl.enable(desktopGL.ALPHA_TEST); 29 wtu.glErrorShouldBe(gl, gl.INVALID_ENUM, "should generate INVALID_ENUM"); 30 gl.viewport(-1, -1, -1, -1); 31 wtu.glErrorShouldBe(gl, gl.INVALID_VALUE, "should generate INVALID_VALUE"); 32 gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, null); 33 wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION, "should generate INVALID_OPERATION"); 34 35 // Generate 2 errors of each type for 6 total possible errors. 36 // The OpenGL ES 2.0 spec section 2.5 says the implementation is allowed to 37 // either return the first error or many errors in an unspecied order. 38 gl.viewport(-1, -1, -1, -1); 39 gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, null); 40 gl.enable(desktopGL.ALPHA_TEST); 41 gl.viewport(-1, -1, -1, -1); 42 gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, null); 43 // Note: This error is specifically last because we know it will be synthasized 44 // by WebGL at least when implemented on top of Desktop OpenGL 45 gl.enable(desktopGL.ALPHA_TEST); 46 47 var err1 = gl.getError(); 48 var err2 = gl.getError(); 49 var err3 = gl.getError(); 50 var err4 = gl.getError(); 51 var err5 = gl.getError(); 52 var err6 = gl.getError(); 53 54 debug(""); 55 if (err2 == gl.NO_ERROR) { 56 debug("This WebGL implementation looks like it uses the 'first error' method"); 57 debug("There should be 1 error, the first one generated"); 58 shouldBeTrue('err1 == gl.INVALID_VALUE && err2 == gl.NO_ERROR && err3 == gl.NO_ERROR'); 59 } else { 60 debug("This WebGL implementation looks like it uses the many error method"); 61 debug("Check is that at least one of the errors is the first error"); 62 shouldBeTrue('err1 == gl.INVALID_VALUE || ' + 63 'err2 == gl.INVALID_VALUE || ' + 64 'err3 == gl.INVALID_VALUE || ' + 65 'err4 == gl.INVALID_VALUE || ' + 66 'err5 == gl.INVALID_VALUE || ' + 67 'err6 == gl.INVALID_VALUE'); 68 shouldBeTrue('gl.getError() == gl.NO_ERROR'); 69 } 70 71 debug(""); 72 var successfullyParsed = true; 73 </script> 74 <script src="../../js/js-test-post.js"></script> 75 76 </body> 77 </html>