Methods and Systems for Supporting a Rendering API Using a Runtime Environment

• US 20120260267A1
• Filed: 04/07/2011
• Published: 10/11/2012
• Est. Priority Date: 04/07/2011
• Status: Active Grant

• Current Assignee: Adobe Systems Incorporated (Adobe Inc.)
• Original Assignee: Adobe Systems Incorporated (Adobe Inc.)
• Inventors: Cucu, Andrian, Tanase, Adrian
• Granted Patent: US 9,286,142 B2
• Time in Patent Office: Days
• US Class Current: 719/328
• CPC Class Codes: G06F 9/54 Interprogram communication
• CPC Class Codes: G06F 9/541 via adapters, e.g. between incompatible applications

Abstract

A computing device can comprise an I/O interface and a processing element connected to the I/O interface and implementing a runtime environment. The processing element can implement a program component that causes the processing element to expose a rendering API not natively supported by the runtime environment, the rendering API invocable by code comprised in a markup document accessed by the processor over the I/O interface. The rendering API can be exposed by causing the runtime environment to respond to and update a proxy object that mirrors properties, methods, and behaviors defined by the rendering API.

Claims

1. A computer, comprising:

an I/O interface; and

a processing element connected to the I/O interface and implementing a runtime environment, the processing element also implementing a rendering application that causes the processing element to provide a proxy object used to expose a rendering API not natively supported by the runtime environment, the rendering API invocable by code comprised in a markup document accessed by the processor over the I/O interface,

the rendering API exposed by causing the runtime environment to respond to properties, methods, and behaviors defined by the rendering API and mirrored by the proxy object.

2. The computer of claim 1, wherein the rendering API comprises a video rendering API.

3. The computer of claim 1,

wherein the markup document invokes functionality of a scripting API that causes the processing element to maintain the proxy object in a non-transitory storage medium.

4. The computer of claim 3, wherein the markup document invokes a getter method of the scripting API that causes the processor to obtain a value of a mirrored property and, based on the value of the mirrored property, invoke a command of the runtime environment, and

wherein the markup document invokes a setter method of the scripting API that causes the processor to set a value of a property mirrored by the proxy object in response to an event or state change of the runtime.

5. The computer of claim 3, wherein the runtime environment causes the processing element to propagate state changes from the runtime environment to the proxy object by invoking the scripting API to change a state of the proxy object.

6. The computer of claim 3, wherein the proxy object causes the processor to dispatch a scripting event matching an event format of the rendering API.

7. The computer of claim 1, wherein the markup document invokes the scripting API to cause the processor to maintain a first copy of the proxy object and a second copy of the proxy object, the first and second copies identical when first initialized, and

wherein the runtime environment is configured to, after the first and second copies are first initialized, determine if the rendering API has been invoked by determining if one of the first and second copies of the proxy object has changed.

8. The computer of claim 1, wherein the proxy object causes the processing element to respond to input changing a writable attribute defined by the rendering API by changing an attribute of the proxy object.

9. The computer of claim 1, wherein the processing element comprises a processor interfaced to a memory, the runtime environment implemented by executing program instructions stored in the memory.

10. The computer of claim 1, wherein the markup document comprises an HTML document, the scripting functionality comprises JavaScript, and the scripting functionality is invoked according to a JavaScript file referenced in the HTML document.

11. The computer of claim 2, wherein the markup document references a video to be played back using the runtime environment with at least one control element rendered by a browser and configured to invoke the video rendering API.

12. A computer program product comprising code embodied in a nontransitory computer-readable medium, the code comprising:

code for invoking functionality of a runtime application; and

code for invoking a scripting API to maintain a proxy object, the proxy object mirroring attributes defined by a video rendering API and configured to invoke a method supported by the runtime application in response to receipt of a command to invoke a call supported by the video rendering API.

13. The computer program product of claim 12, wherein the code for invoking the scripting API comprises markup code invoking scripting functionality of a browser application.

14. The computer program product of claim 13, wherein the proxy object mirrors the property names, method names, and behaviors defined by the HTMLVideoElement, HTMLAudioElement, and HTMLMediaElement APIs.

15. The computer program product of claim 12,

wherein the code for invoking the functionality of the runtime application comprises a first markup element referencing a runtime application to be executed in the runtime environment to play a video.

16. The computer program product of claim 15, further comprising:

code for generating an interface element, the code for generating the interface element comprising a second markup element defining how the interface element is to be rendered; and

code for providing the command to invoke the call supported by the video rendering API in response to an input event generated by the interface element.

17. The computer program product of claim 16, wherein the call supported by the video rendering API comprises a playback control command and the method invoked by the proxy object comprises a corresponding method that controls playback of the video by the runtime environment.

18. A computer-implemented method, comprising:

determining, by a processing device, a state of a proxy object maintained in a computer-readable medium, the proxy object mirroring attributes video rendering API supported by a browser application;

in response to determining the state of the proxy object and based on the state of the proxy object, invoking, by the processing device, a method supported by a runtime environment.

19. The method of claim 18, further comprising:

in response to determining the state of the proxy object and based on the state of the proxy object, dispatching an event defined by the video rendering API.

20. The method of claim 19, further comprising:

prior to determining the state of the proxy object, updating an attribute of the proxy object in response to a change of state of the runtime environment,

wherein the event that is subsequently dispatched is defined by the proxy object to correspond to the attribute as updated.