diff options
author | Emmanuele Bassi <ebassi@gnome.org> | 2015-10-07 15:26:53 +0100 |
---|---|---|
committer | Emmanuele Bassi <ebassi@gnome.org> | 2015-10-07 16:21:57 +0100 |
commit | f10c0da36c27922bebb0f55aa876f215e4840c8e (patch) | |
tree | bdb63e150925770e05910bfc1ee51bb8a0d14bc5 | |
parent | 59d02afec0918bfb56e50067ad0360b12c543848 (diff) | |
download | gtk+-f10c0da36c27922bebb0f55aa876f215e4840c8e.tar.gz |
wayland: Allow falling back to compatibility EGL contexts
If the shared context is in legacy mode, or if the creation of a core
profile context failed, we fall back to an EGL context in compatibility
mode.
Since we're relying on a fairly new EGL implementation for Wayland, we
don't fall back to the older EGL API, and instead we always require the
EGL_KHR_create_context extension.
https://bugzilla.gnome.org/show_bug.cgi?id=756142
-rw-r--r-- | gdk/wayland/gdkglcontext-wayland.c | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/gdk/wayland/gdkglcontext-wayland.c b/gdk/wayland/gdkglcontext-wayland.c index 9598e19a65..987c717a6b 100644 --- a/gdk/wayland/gdkglcontext-wayland.c +++ b/gdk/wayland/gdkglcontext-wayland.c @@ -114,12 +114,14 @@ gdk_wayland_gl_context_realize (GdkGLContext *context, EGLContext ctx; EGLint context_attribs[N_EGL_ATTRS]; int major, minor, flags; - gboolean debug_bit, forward_bit; + gboolean debug_bit, forward_bit, legacy_bit; int i = 0; gdk_gl_context_get_required_version (context, &major, &minor); debug_bit = gdk_gl_context_get_debug_enabled (context); forward_bit = gdk_gl_context_get_forward_compatible (context); + legacy_bit = (_gdk_gl_flags & GDK_GL_LEGACY) != 0 || + (share != NULL && gdk_gl_context_is_legacy (share)); flags = 0; @@ -128,15 +130,17 @@ gdk_wayland_gl_context_realize (GdkGLContext *context, if (forward_bit) flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR; - /* We want a core profile */ + /* We want a core profile, unless in legacy mode */ context_attribs[i++] = EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR; - context_attribs[i++] = EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR; + context_attribs[i++] = legacy_bit + ? EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR + : EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR; /* Specify the version */ context_attribs[i++] = EGL_CONTEXT_MAJOR_VERSION_KHR; - context_attribs[i++] = major; + context_attribs[i++] = legacy_bit ? 3 : major; context_attribs[i++] = EGL_CONTEXT_MINOR_VERSION_KHR; - context_attribs[i++] = minor; + context_attribs[i++] = legacy_bit ? 0 : minor; /* Specify the flags */ context_attribs[i++] = EGL_CONTEXT_FLAGS_KHR; @@ -150,6 +154,25 @@ gdk_wayland_gl_context_realize (GdkGLContext *context, share != NULL ? GDK_WAYLAND_GL_CONTEXT (share)->egl_context : EGL_NO_CONTEXT, context_attribs); + + /* If context creation failed without the legacy bit, let's try again with it */ + if (ctx == NULL && !legacy_bit) + { + /* Ensure that re-ordering does not break the offsets */ + g_assert (context_attribs[0] == EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR); + context_attribs[1] = EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR; + context_attribs[3] = 3; + context_attribs[5] = 0; + + legacy_bit = TRUE; + + ctx = eglCreateContext (display_wayland->egl_display, + context_wayland->egl_config, + share != NULL ? GDK_WAYLAND_GL_CONTEXT (share)->egl_context + : EGL_NO_CONTEXT, + context_attribs); + } + if (ctx == NULL) { g_set_error_literal (error, GDK_GL_ERROR, @@ -162,6 +185,8 @@ gdk_wayland_gl_context_realize (GdkGLContext *context, context_wayland->egl_context = ctx; + gdk_gl_context_set_is_legacy (context, legacy_bit); + return TRUE; } |