egl: Add EGL_CHROMIUM_sync_control extension.

Chromium defined a new GL extension (that isn't registered with Khronos).
We need to add an EGL extension for it, so we can migrate ChromeOS on
Intel systems to use EGL instead of GLX.

http://git.chromium.org/gitweb/?p=chromium/src/third_party/khronos.git;a=commitdiff;h=27cbfdab35c601f70aa150581ad1448d0401f447

The EGL_CHROMIUM_sync_control extension is similar to the GLX extension
OML_sync_control, but only defines one function,
eglGetSyncValuesCHROMIUM, which is equivalent to glXGetSyncValuesOML.

http://www.opengl.org/registry/specs/OML/glx_sync_control.txt

Signed-off-by: Sarah Sharp <[email protected]>
Reviewed-by: Chad Versace <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>
Cc: Jamey Sharp <[email protected]>
Cc: Ian Romanick <[email protected]>
Cc: Stéphane Marchesin <[email protected]>

7 files changed, 54 insertions, 0 deletions

diff --git a/src/egl/drivers/dri2/egl_dri2.c b/src/egl/drivers/dri2/egl_dri2.c
index a5f71edb984..f7f2da254e2 100644
--- a/src/egl/drivers/dri2/egl_dri2.c
+++ b/src/egl/drivers/dri2/egl_dri2.c
@@ -1389,6 +1389,15 @@ dri2_create_image_wayland_wl_buffer(_EGLDisplay *disp, _EGLContext *ctx,
 }
 #endif
 
+static EGLBoolean
+dri2_get_sync_values_chromium(_EGLDisplay *dpy, _EGLSurface *surf,
+                              EGLuint64KHR *ust, EGLuint64KHR *msc,
+                              EGLuint64KHR *sbc)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
+   return dri2_dpy->vtbl->get_sync_values(dpy, surf, ust, msc, sbc);
+}
+
 /**
  * Set the error code after a call to
  * dri2_egl_image::dri_image::createImageFromTexture.
@@ -2182,6 +2191,7 @@ _eglBuiltInDriverDRI2(const char *args)
    dri2_drv->base.API.UnbindWaylandDisplayWL = dri2_unbind_wayland_display_wl;
    dri2_drv->base.API.QueryWaylandBufferWL = dri2_query_wayland_buffer_wl;
 #endif
+   dri2_drv->base.API.GetSyncValuesCHROMIUM = dri2_get_sync_values_chromium;
 
    dri2_drv->base.Name = "DRI2";
    dri2_drv->base.Unload = dri2_unload;
diff --git a/src/egl/drivers/dri2/egl_dri2.h b/src/egl/drivers/dri2/egl_dri2.h
index 44d6d74b948..0dd9d69d08e 100644
--- a/src/egl/drivers/dri2/egl_dri2.h
+++ b/src/egl/drivers/dri2/egl_dri2.h
@@ -138,6 +138,10 @@ struct dri2_egl_display_vtbl {
 
    struct wl_buffer* (*create_wayland_buffer_from_image)(
                         _EGLDriver *drv, _EGLDisplay *dpy, _EGLImage *img);
+
+   EGLBoolean (*get_sync_values)(_EGLDisplay *display, _EGLSurface *surface,
+                                 EGLuint64KHR *ust, EGLuint64KHR *msc,
+                                 EGLuint64KHR *sbc);
 };
 
 struct dri2_egl_display
diff --git a/src/egl/drivers/dri2/egl_dri2_fallbacks.h b/src/egl/drivers/dri2/egl_dri2_fallbacks.h
index a5cf344f5e8..9cba0010ba7 100644
--- a/src/egl/drivers/dri2/egl_dri2_fallbacks.h
+++ b/src/egl/drivers/dri2/egl_dri2_fallbacks.h
@@ -98,3 +98,11 @@ dri2_fallback_create_wayland_buffer_from_image(_EGLDriver *drv,
 {
    return NULL;
 }
+
+static inline EGLBoolean
+dri2_fallback_get_sync_values(_EGLDisplay *dpy, _EGLSurface *surf,
+                              EGLuint64KHR *ust, EGLuint64KHR *msc,
+                              EGLuint64KHR *sbc)
+{
+   return EGL_FALSE;
+}
diff --git a/src/egl/drivers/dri2/platform_android.c b/src/egl/drivers/dri2/platform_android.c
index 7b1db7677ce..71948bd88fe 100644
--- a/src/egl/drivers/dri2/platform_android.c
+++ b/src/egl/drivers/dri2/platform_android.c
@@ -650,6 +650,7 @@ static struct dri2_egl_display_vtbl droid_display_vtbl = {
    .copy_buffers = dri2_fallback_copy_buffers,
    .query_buffer_age = dri2_fallback_query_buffer_age,
    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
+   .get_sync_values = dri2_fallback_get_sync_values,
 };
 
 EGLBoolean
diff --git a/src/egl/drivers/dri2/platform_drm.c b/src/egl/drivers/dri2/platform_drm.c
index 9a7633a070a..52d8b49aa9e 100644
--- a/src/egl/drivers/dri2/platform_drm.c
+++ b/src/egl/drivers/dri2/platform_drm.c
@@ -472,6 +472,7 @@ static struct dri2_egl_display_vtbl dri2_drm_display_vtbl = {
    .copy_buffers = dri2_fallback_copy_buffers,
    .query_buffer_age = dri2_drm_query_buffer_age,
    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
+   .get_sync_values = dri2_fallback_get_sync_values,
 };
 
 EGLBoolean
diff --git a/src/egl/drivers/dri2/platform_wayland.c b/src/egl/drivers/dri2/platform_wayland.c
index 37dcf19f9be..537d26e97b7 100644
--- a/src/egl/drivers/dri2/platform_wayland.c
+++ b/src/egl/drivers/dri2/platform_wayland.c
@@ -964,6 +964,7 @@ static struct dri2_egl_display_vtbl dri2_wl_display_vtbl = {
    .copy_buffers = dri2_fallback_copy_buffers,
    .query_buffer_age = dri2_wl_query_buffer_age,
    .create_wayland_buffer_from_image = dri2_wl_create_wayland_buffer_from_image,
+   .get_sync_values = dri2_fallback_get_sync_values,
 };
 
 EGLBoolean
diff --git a/src/egl/drivers/dri2/platform_x11.c b/src/egl/drivers/dri2/platform_x11.c
index 7b585a21971..874bcc48fe6 100644
--- a/src/egl/drivers/dri2/platform_x11.c
+++ b/src/egl/drivers/dri2/platform_x11.c
@@ -1008,6 +1008,32 @@ dri2_x11_swrast_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
    return NULL;
 }
 
+static EGLBoolean
+dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
+                         EGLuint64KHR *ust, EGLuint64KHR *msc,
+                         EGLuint64KHR *sbc)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
+   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
+   xcb_dri2_get_msc_cookie_t cookie;
+   xcb_dri2_get_msc_reply_t *reply;
+
+   cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
+   reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
+
+   if (!reply) {
+      _eglError(EGL_BAD_ACCESS, __func__);
+      return EGL_FALSE;
+   }
+
+   *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
+   *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
+   *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
+   free(reply);
+
+   return EGL_TRUE;
+}
+
 static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
    .authenticate = NULL,
    .create_window_surface = dri2_x11_create_window_surface,
@@ -1022,6 +1048,7 @@ static struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
    .copy_buffers = dri2_x11_copy_buffers,
    .query_buffer_age = dri2_fallback_query_buffer_age,
    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
+   .get_sync_values = dri2_fallback_get_sync_values,
 };
 
 static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
@@ -1039,6 +1066,7 @@ static struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
    .copy_buffers = dri2_x11_copy_buffers,
    .query_buffer_age = dri2_fallback_query_buffer_age,
    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
+   .get_sync_values = dri2_x11_get_sync_values,
 };
 
 static EGLBoolean
@@ -1243,6 +1271,7 @@ dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
    disp->Extensions.NOK_swap_region = EGL_TRUE;
    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
+   disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
 
 #ifdef HAVE_WAYLAND_PLATFORM
    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;