[Webkit-unassigned] [Bug 146680] New: Replace OpenGL{, ES}Shims with libepoxy, and #if USE(OPENGL_ES_2) with runtime checks

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=146680

            Bug ID: 146680
           Summary: Replace OpenGL{,ES}Shims with libepoxy, and #if
                    USE(OPENGL_ES_2) with runtime checks
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
               URL: https://github.com/anholt/libepoxy
                OS: Linux
            Status: NEW
          Severity: Enhancement
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: emmanuel.peyrot at collabora.com
                CC: clopez at igalia.com

libepoxy is a library retrieving function pointers from a libGL, one of the many OpenGL wranglers you might have hard from.

What makes it better than the current solution is its automated aliasing of identical functions, and its ability to select a libGL or libGLESv2 at runtime instead of at compile-time, so no recompilation with -DENABLE_GLES2=ON and OFF required anymore to support both APIs on multiple drivers, everything in a single binary.

In most case, #if USE(OPENGL_ES_2) would be replaced with a cached if (!epoxy_is_desktop_gl()), cached to avoid a potential runtime string comparison everytime the function is called.

libepoxy is a dependency of GTK+ and Xorg (for GLAMOR), and probably some other widely used software, so this usually won’t add another dependency.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.webkit.org/pipermail/webkit-unassigned/attachments/20150707/d920b441/attachment.html>