| <!DOCTYPE HTML> |
| |
| <!-- READ BEFORE UPDATING: |
| If this test is updated make sure to increment the "revision" value of the |
| associated test in content/test/gpu/gpu_tests/pixel_test_pages.py. This will ensure |
| that the baseline images are regenerated on the next run. |
| --> |
| |
| <html> |
| <head> |
| <title>OffscreenCanvas webgl.commit with resizing: red triangle with softened edge.</title> |
| <style type="text/css"> |
| .nomargin { |
| margin: 0px auto; |
| } |
| </style> |
| <script id="myWorker" type="text/worker"> |
| function drawTriangle(gl) |
| { |
| gl.clearColor(0, 1, 0, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| |
| var prog = gl.createProgram(); |
| var vs = gl.createShader(gl.VERTEX_SHADER); |
| gl.shaderSource(vs, [ |
| 'attribute vec2 pos;', 'void main() {', |
| ' gl_Position = vec4(pos, 0., .5);', '}' |
| ].join('\n')); |
| gl.compileShader(vs); |
| if (!gl.getShaderParameter(vs, gl.COMPILE_STATUS)) { |
| throw 'failed to compiled shader'; |
| } |
| gl.attachShader(prog, vs); |
| |
| var fs = gl.createShader(gl.FRAGMENT_SHADER); |
| gl.shaderSource( |
| fs, [ 'void main() {', ' gl_FragColor = vec4(1, 0, 0.5, 1);', '}' ].join('\n')); |
| gl.compileShader(fs); |
| if (!gl.getShaderParameter(fs, gl.COMPILE_STATUS)) { |
| throw 'failed to compiled shader'; |
| } |
| gl.attachShader(prog, fs); |
| |
| gl.linkProgram(prog); |
| if (!gl.getProgramParameter(prog, gl.LINK_STATUS)) { |
| throw "Could not link the shader program!"; |
| } |
| gl.useProgram(prog); |
| |
| gl.bindBuffer(gl.ARRAY_BUFFER, gl.createBuffer()); |
| gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ -.5, .5, 0, 0, -.5, -.5 ]), |
| gl.STATIC_DRAW); |
| var attr = gl.getAttribLocation(prog, 'pos'); |
| gl.enableVertexAttribArray(attr); |
| gl.vertexAttribPointer(attr, 2, gl.FLOAT, false, 0, 0); |
| |
| gl.drawArrays(gl.TRIANGLE_STRIP, 0, 3); |
| |
| |
| } |
| |
| self.onmessage = function(e) { |
| var transfered = e.data; |
| // Resize the canvas from 200X200 to 40X50 |
| // The triangle should scale proportionately with edge softened |
| transfered.width = 40; |
| transfered.height = 50; |
| |
| var gl = transfered.getContext('webgl'); |
| drawTriangle(gl); |
| gl.commit(); |
| |
| self.postMessage(""); |
| }; |
| </script> |
| <script> |
| var g_swapsBeforeAck = 15; |
| |
| function makeWorker(script) |
| { |
| var blob = new Blob([script]); |
| return new Worker(URL.createObjectURL(blob)); |
| } |
| |
| function waitForFinish() |
| { |
| if (g_swapsBeforeAck == 0) { |
| domAutomationController.setAutomationId(1); |
| domAutomationController.send("SUCCESS"); |
| } else { |
| g_swapsBeforeAck--; |
| document.getElementById('container').style.zIndex = g_swapsBeforeAck + 1; |
| window.webkitRequestAnimationFrame(waitForFinish); |
| } |
| } |
| |
| function main() |
| { |
| var canvas2D = document.getElementById("c"); |
| var offscreenCanvas = canvas2D.transferControlToOffscreen(); |
| var worker = makeWorker(document.getElementById("myWorker").textContent); |
| worker.onmessage = function (e) { |
| waitForFinish(); |
| }; |
| worker.postMessage(offscreenCanvas, [offscreenCanvas]); |
| } |
| </script> |
| </head> |
| <body onload="main()"> |
| <div style="position:relative; width:200px; height:200px; background-color:white"> |
| </div> |
| <div id="container" style="position:absolute; top:0px; left:0px"> |
| <canvas id="c" width="200" height="200" class="nomargin"></canvas> |
| </div> |
| </body> |
| </html> |
