| <!-- |
| 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"> |
| <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> |
| <div id="console"></div> |
| |
| <script> |
| "use strict"; |
| description('Tests that index validation for drawElements does not examine too many indices'); |
| |
| var wtu = WebGLTestUtils; |
| var context = wtu.create3DContext(); |
| var program = wtu.loadStandardProgram(context); |
| |
| context.useProgram(program); |
| var vertexObject = context.createBuffer(); |
| context.enableVertexAttribArray(0); |
| context.bindBuffer(context.ARRAY_BUFFER, vertexObject); |
| // 4 vertices -> 2 triangles |
| context.bufferData(context.ARRAY_BUFFER, new Float32Array([ 0,0,0, 0,1,0, 1,0,0, 1,1,0 ]), context.STATIC_DRAW); |
| context.vertexAttribPointer(0, 3, context.FLOAT, false, 0, 0); |
| |
| var indexObject = context.createBuffer(); |
| |
| debug("Test out of range indices") |
| context.bindBuffer(context.ELEMENT_ARRAY_BUFFER, indexObject); |
| context.bufferData(context.ELEMENT_ARRAY_BUFFER, new Uint16Array([ 10000, 0, 1, 2, 3, 10000 ]), context.STATIC_DRAW); |
| var indexValidationError = wtu.shouldGenerateGLError(context, [context.INVALID_OPERATION, context.NO_ERROR], "context.drawElements(context.TRIANGLE_STRIP, 4, context.UNSIGNED_SHORT, 0)"); |
| wtu.shouldGenerateGLError(context, context.NO_ERROR, "context.drawElements(context.TRIANGLE_STRIP, 4, context.UNSIGNED_SHORT, 2)"); |
| wtu.shouldGenerateGLError(context, indexValidationError, "context.drawElements(context.TRIANGLE_STRIP, 4, context.UNSIGNED_SHORT, 4)"); |
| |
| debug("") |
| var successfullyParsed = true; |
| </script> |
| |
| <script src="../../js/js-test-post.js"></script> |
| </body> |
| </html> |
