diff options
| -rw-r--r-- | libweston/gl-renderer.c | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/libweston/gl-renderer.c b/libweston/gl-renderer.c index d3ed4a10..a6b29a92 100644 --- a/libweston/gl-renderer.c +++ b/libweston/gl-renderer.c @@ -223,6 +223,8 @@ struct gl_renderer { PFNEGLQUERYWAYLANDBUFFERWL query_buffer; int has_bind_display; + int has_context_priority; + int has_egl_image_external; int has_egl_buffer_age; @@ -3189,6 +3191,9 @@ gl_renderer_setup_egl_extensions(struct weston_compositor *ec) return -1; } + if (weston_check_egl_extension(extensions, "EGL_IMG_context_priority")) + gr->has_context_priority = 1; + if (weston_check_egl_extension(extensions, "EGL_WL_bind_wayland_display")) gr->has_bind_display = 1; if (gr->has_bind_display) { @@ -3631,10 +3636,10 @@ gl_renderer_setup(struct weston_compositor *ec, EGLSurface egl_surface) EGLConfig context_config; EGLBoolean ret; - EGLint context_attribs[] = { + EGLint context_attribs[16] = { EGL_CONTEXT_CLIENT_VERSION, 0, - EGL_NONE }; + unsigned int nattr = 2; if (!eglBindAPI(EGL_OPENGL_ES_API)) { weston_log("failed to bind EGL_OPENGL_ES_API\n"); @@ -3642,6 +3647,21 @@ gl_renderer_setup(struct weston_compositor *ec, EGLSurface egl_surface) return -1; } + /* + * Being the compositor we require minimum output latency, + * so request a high priority context for ourselves - that should + * reschedule all of our rendering and its dependencies to be completed + * first. If the driver doesn't permit us to create a high priority + * context, it will fallback to the default priority (MEDIUM). + */ + if (gr->has_context_priority) { + context_attribs[nattr++] = EGL_CONTEXT_PRIORITY_LEVEL_IMG; + context_attribs[nattr++] = EGL_CONTEXT_PRIORITY_HIGH_IMG; + } + + assert(nattr < ARRAY_LENGTH(context_attribs)); + context_attribs[nattr] = EGL_NONE; + context_config = gr->egl_config; if (gr->has_configless_context) @@ -3665,6 +3685,18 @@ gl_renderer_setup(struct weston_compositor *ec, EGLSurface egl_surface) } } + if (gr->has_context_priority) { + EGLint value = EGL_CONTEXT_PRIORITY_MEDIUM_IMG; + + eglQueryContext(gr->egl_display, gr->egl_context, + EGL_CONTEXT_PRIORITY_LEVEL_IMG, &value); + + if (value != EGL_CONTEXT_PRIORITY_HIGH_IMG) { + weston_log("Failed to obtain a high priority context.\n"); + /* Not an error, continue on as normal */ + } + } + ret = eglMakeCurrent(gr->egl_display, egl_surface, egl_surface, gr->egl_context); if (ret == EGL_FALSE) { |