Hi again,
Just some additional info: If I only record the values of the port x & y information and the clip rectangle in NPP_SetWindow() and wait until the next call to HandleEvent() to redisplay the OpenGL surface (instead of re-displaying directly from NPP_SetWindow()) then I don't see any artifacts BUT this only works when scrolling with the mouse wheel because there is an "activateEvent" immediately sent through HandleEvent() following the NPP_SetWindow() call. When scrolling using the scrollbars on the side of the web page however this doesn't work as HandleEvent() doesn't seem to be called at all while the user scrolls (only NPP_SetWindow() is called repeatedly, and later an "activateEvent" is fired when the user releases the mouse button). So this causes my opengl surface to only update when the user releaes the mouse. Hope this helps, Cheers, Damien Chavarria. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Damien Chavarria Sent: vendredi 30 mars 2007 21:05 To: [email protected] Subject: [webkit-dev] Question about OpenGL and NPAPI plugins Ye almighty gods of teh WebKit, I am writing a web browser plugin for Mac (Firefox, Safari, ..) so I built a .plugin bundle using the oldish NPAPI and Carbon. Everything is going rather fine but my problem is that my plugin uses OpenGL (AGL) to draw its contents. I implement some logic the NPP_SetWindow() method that the browser is calling on my plugin to determine where I need to draw in the browser window and how I need to clip by looking at the clipRect and the port x and y in the structure I receive. Since the OpenGL surface is above pretty much everything on the window I need to be careful not to overwrite anything when the contents are scrolled. While my code seems to work fine with Firefox and Camino, I can't get it to behave ok in Safari. What happens is that when I scroll the page (using the mouse wheel or the scrollbars) my plugin leaves artifacts on the rest of the HTML page in Safari. It doesn't go "out" of the HTML scrolled viewport frame but leaves slices of it's content around where it's been moved. I used AGL_BUFFER_RECT and glScissor() in my OpenGL rendering to place and clip the contents of the plugin UI. I don't know if they are other browser plugins out there that still use the older NPAPI and are able to render OpenGL contents in Safari or if there is a workaround I could experiment. I think I have the option to write a NSView-based .webplugin to fix this but if there is a shorter term fix that could help me quite a bit. I have tried my plugin with the latest WebKit nighlty and it still shows the problem so I am turning to you guys for help :) Let me know if you need more details. Cheers, Damien Chavarria. _______________________________________________ webkit-dev mailing list [email protected] http://lists.webkit.org/mailman/listinfo/webkit-dev _______________________________________________ webkit-dev mailing list [email protected] http://lists.webkit.org/mailman/listinfo/webkit-dev
