vo_opengl: add initial ANGLE support

ANGLE is a GLES2 implementation for Windows that uses Direct3D 11 for
rendering, enabling vo_opengl to work on systems with poor OpenGL
drivers and bypassing some of the problems with native GL, such as VSync
in fullscreen mode.

Unfortunately, using GLES2 means that most of vo_opengl's advanced
features will not work, however ANGLE is under rapid development and
GLES3 support is supposed to be coming soon.

1 files changed, 8 insertions, 0 deletions

diff --git a/wscript b/wscript
index 858dcc901c..0f113002ba 100644
--- a/wscript
+++ b/wscript
@@ -659,6 +659,14 @@ video_output_features = [
         'func': check_statement('windows.h', 'wglCreateContext(0)',
                                 lib='opengl32')
     } , {
+        'name': '--egl-angle',
+        'desc': 'OpenGL Win32 ANGLE Backend',
+        'deps_any': [ 'os-win32', 'os-cygwin' ],
+        'groups': [ 'gl' ],
+        'func': check_statement(['EGL/egl.h'],
+                                'eglCreateWindowSurface(0, 0, 0, 0)',
+                                lib='EGL')
+    } , {
         'name': '--vdpau',
         'desc': 'VDPAU acceleration',
         'deps': [ 'x11' ],