| <!DOCTYPE html> |
| <html> |
| <style> |
| canvas { |
| width: 100px; |
| height: 100px; |
| } |
| </style> |
| <body> |
| <div> |
| <p>Frames of a 3-frame animated image with infinite loopCount:</p> |
| <canvas id="canvas-A"></canvas> |
| <canvas id="canvas-B"></canvas> |
| <canvas id="canvas-C"></canvas> |
| <canvas id="canvas-D"></canvas> |
| <canvas id="canvas-E"></canvas> |
| <canvas id="canvas-F"></canvas> |
| <canvas id="canvas-G"></canvas> |
| </div> |
| <script> |
| function drawFrame(image, canvasId) { |
| return new Promise((resolve) => { |
| let canvas = document.getElementById("canvas-" + canvasId); |
| let context = canvas.getContext("2d"); |
| context.drawImage(image, 0, 0, canvas.width, canvas.height); |
| setTimeout(() => { |
| resolve(String.fromCharCode(canvasId.charCodeAt() + 1)); |
| }, 30); |
| }); |
| } |
| |
| function drawImage(image, canvasId, frameCount) { |
| let promise = drawFrame(image, canvasId); |
| for (let frame = 1; frame < frameCount; ++frame) { |
| promise = promise.then((canvasId) => { |
| return drawFrame(image, canvasId); |
| }); |
| } |
| return promise; |
| } |
| |
| function loadImage(src, canvasId, frameCount) { |
| return new Promise((resolve) => { |
| let image = new Image; |
| image.onload = (() => { |
| drawImage(image, canvasId, frameCount).then(resolve); |
| }); |
| image.src = src; |
| }); |
| } |
| |
| (function() { |
| if (window.internals) { |
| internals.clearMemoryCache(); |
| internals.settings.setAnimatedImageDebugCanvasDrawingEnabled(true); |
| } |
| |
| if (window.testRunner) |
| testRunner.waitUntilDone(); |
| |
| var imageSrc = "resources/animated-red-green-blue-repeat-infinite.gif"; |
| var firstCanvasId = 'A'; |
| var frameCount = 7; |
| |
| loadImage(imageSrc, firstCanvasId, frameCount).then(() => { |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }); |
| })(); |
| </script> |
| </body> |
| </html> |
