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| ** Copyright (c) 2012 The Khronos Group Inc. |
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| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>Element Array Buffer Deletion and Recreation Test</title> |
| <link rel="stylesheet" href="../../resources/js-test-style.css"/> |
| <script src="../../resources/js-test-pre.js"></script> |
| <script src="../resources/webgl-test.js"> </script> |
| <script src="../resources/webgl-test-utils.js"> </script> |
| </head> |
| <body> |
| <canvas id="example" width="32" height="32"></canvas> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script> |
| "use strict"; |
| var wtu = WebGLTestUtils; |
| function init() |
| { |
| description(); |
| |
| // Clear the background with red. |
| var gl = wtu.create3DContext("example"); |
| wtu.setupSimpleColorProgram(gl); |
| var color = [0, 255, 0, 255]; |
| wtu.setUByteDrawColor(gl, color); |
| |
| var vertexBuffer = gl.createBuffer(); |
| gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer); |
| gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ |
| -1, -1, |
| 1, -1, |
| -1, 1, |
| 1, 1 |
| ]), gl.STATIC_DRAW); |
| gl.enableVertexAttribArray(0); |
| gl.vertexAttribPointer(0, 2, gl.FLOAT, false, 0, 0); |
| |
| // Create an element array buffer. |
| var indexBuffer = gl.createBuffer(); |
| gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, indexBuffer); |
| gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint8Array([0, 1, 2, 3]), gl.STATIC_DRAW); |
| |
| // Delete the element array buffer. |
| gl.deleteBuffer(indexBuffer); |
| |
| // Create a new element array buffer. |
| indexBuffer = gl.createBuffer(); |
| gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, indexBuffer); |
| gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint8Array([0, 1, 2, 3]), gl.STATIC_DRAW); |
| |
| // Draw with the new element array buffer. |
| // If the geometry is drawn successfully, the fragment shader will color it green. |
| gl.drawElements(gl.TRIANGLE_STRIP, 4, gl.UNSIGNED_BYTE, 0); |
| |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "no errors from draw"); |
| wtu.checkCanvas(gl, color, "should be green") |
| } |
| |
| init(); |
| var successfullyParsed = true; |
| </script> |
| <script src="../../resources/js-test-post.js"></script> |
| </body> |
| </html> |
