WebGL can be enabled by setting
QWebSettings::WebGLEnabled in your application. In addition,
QWebSettings::AcceleratedCompositingEnabled needs to be enabled. For performance reasons, at the moment WebGL is scoped to work only together with accelerated compositing. For the best performance, you should use
QGLWidget viewport. With this configuration QtWebKit is able to texture map the WebGL canvas directly. Otherwise, it has to do expensive memory copying into canvas image buffer for each frame.
In order to compile the WebGL support, use the following command-line:
Tools/Scripts/build-webkit --qt --3d-canvas
For QtTestBrowser, use command-line options
-graphicsbased -gl-viewport -webgl to enable WebGL.
LayoutTests for WebGL
Layout tests for WebGL work with QtWebKit:
LayoutTestsControllerQthas support for enforcing WebGL support in
overridePreference(). This used by WebGL test cases to enable WebGL support.
DumpRenderTreeQtenables QGraphicsWebView for layout tests if environment variable
- Accelerated compositing is enabled by default in
QWebSettingsand DumpRenderTree does not touch to that option.
The correct command-line for running layout tests is
QT_DRT_WEBVIEW_MODE=graphics WebKitTools/Scripts/run-webkit-tests --qt
Some real-world test cases
Here are some pages that might be useful for testing:
Things left to do
- [Qt] When we render WebGL offscreen, color conversion cost a lot of CPU cycles
- Create autotest suite Source/WebKit/qt/tests
- Test implementation on Symbian and fix possible defects.
- [Qt] QWebPage with WebGL content crashes when rendering if no QWebView parent