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| |
| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>WEBGL_get_buffer_sub_data_async context loss regression test.</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> |
| <div id="description"></div> |
| <canvas id="canvas" width="1" height="1"></canvas> |
| <div id="console"></div> |
| <script> |
| "use strict"; |
| description("This test makes sure that getBufferSubDataAsync does not cause crashes upon context loss."); |
| |
| var wtu = WebGLTestUtils; |
| var canvas = document.getElementById("canvas"); |
| |
| var gl = wtu.create3DContext(canvas, undefined, 2); |
| var WEBGL_get_buffer_sub_data_async = gl.getExtension("WEBGL_get_buffer_sub_data_async"); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup."); |
| if (!WEBGL_get_buffer_sub_data_async) { |
| testPassed("No WEBGL_get_buffer_sub_data_async support -- this is legal"); |
| finishTest(); |
| } else { |
| testPassed("Successfully enabled WEBGL_get_buffer_sub_data_async extension"); |
| runTests(); |
| } |
| |
| var extension; |
| |
| function runTests() { |
| var extensionName = wtu.getSupportedExtensionWithKnownPrefixes(gl, "WEBGL_lose_context"); |
| if (!extensionName) { |
| debug("Could not find WEBGL_lose_context extension"); |
| return; |
| } |
| extension = gl.getExtension(extensionName); |
| |
| var iter = 0; |
| var ITERS = 20; |
| canvas.addEventListener("webglcontextrestored", test); |
| canvas.addEventListener("webglcontextlost", function(e) { |
| e.preventDefault(); |
| webglHarnessCollectGarbage(); |
| setTimeout(function() { |
| wtu.shouldGenerateGLError(gl, gl.NO_ERROR, "extension.restoreContext()"); |
| }, 100); |
| }); |
| |
| test(); |
| |
| function test() { |
| shouldBeFalse("gl.isContextLost()"); |
| if (iter >= ITERS) { |
| finishTest(); |
| return; |
| } |
| iter++; |
| |
| var pbo = gl.createBuffer(); |
| gl.bindBuffer(gl.PIXEL_PACK_BUFFER, pbo); |
| gl.bufferData(gl.PIXEL_PACK_BUFFER, 4, gl.DYNAMIC_READ); |
| gl.bindBuffer(gl.PIXEL_PACK_BUFFER, null); |
| var readbackBuffer = new Uint8Array(4); |
| |
| gl.bindBuffer(gl.PIXEL_PACK_BUFFER, pbo); |
| gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, 0); |
| var promise = WEBGL_get_buffer_sub_data_async.getBufferSubDataAsync(gl.PIXEL_PACK_BUFFER, 0, readbackBuffer); |
| gl.bindBuffer(gl.PIXEL_PACK_BUFFER, null); |
| var completed = false; |
| promise.then(function(buf) { |
| testFailed("should not resolve"); |
| }, function(e) { |
| testPassed("correctly rejected with " + e); |
| wtu.glErrorShouldBe(gl, gl.NO_ERROR, "should be no new errors from late rejection"); |
| }).then(function() { |
| completed = true; |
| }); |
| |
| wtu.shouldGenerateGLError(gl, gl.CONTEXT_LOST_WEBGL, "extension.loseContext()"); |
| } |
| } |
| |
| var successfullyParsed = true; |
| </script> |
| </body> |
| </html> |