5 files changed, 40 insertions, 0 deletions
diff --git a/cogl/cogl-frame-info-private.h b/cogl/cogl-frame-info-private.h
index 32f5ba8e..ec8ff9c4 100644
--- a/cogl/cogl-frame-info-private.h
+++ b/cogl/cogl-frame-info-private.h
@@ -43,6 +43,7 @@ struct _CoglFrameInfo
   float refresh_rate;
 
   CoglOutput *output;
+  int fd;
 };
 
 CoglFrameInfo *_cogl_frame_info_new (void);
diff --git a/cogl/cogl-frame-info.c b/cogl/cogl-frame-info.c
index 2114a64b..91af5f59 100644
--- a/cogl/cogl-frame-info.c
+++ b/cogl/cogl-frame-info.c
@@ -53,6 +53,8 @@ _cogl_frame_info_new (void)
 static void
 _cogl_frame_info_free (CoglFrameInfo *info)
 {
+  if (info->fd)
+    close (info->fd);
   g_slice_free (CoglFrameInfo, info);
 }
 
@@ -79,3 +81,9 @@ cogl_frame_info_get_output (CoglFrameInfo *info)
 {
   return info->output;
 }
+
+int
+cogl_frame_info_get_fd (CoglFrameInfo *info)
+{
+  return info->fd;
+}
diff --git a/cogl/cogl-frame-info.h b/cogl/cogl-frame-info.h
index 7304c530..6027937b 100644
--- a/cogl/cogl-frame-info.h
+++ b/cogl/cogl-frame-info.h
@@ -143,6 +143,8 @@ float cogl_frame_info_get_refresh_rate (CoglFrameInfo *info);
 CoglOutput *
 cogl_frame_info_get_output (CoglFrameInfo *info);
 
+int cogl_frame_info_get_fd (CoglFrameInfo *info);
+
 G_END_DECLS
 
 #endif /* __COGL_FRAME_INFO_H */
diff --git a/cogl/cogl-framebuffer.h b/cogl/cogl-framebuffer.h
index 58d65a82..24e4250c 100644
--- a/cogl/cogl-framebuffer.h
+++ b/cogl/cogl-framebuffer.h
@@ -1865,6 +1865,9 @@ typedef enum { /*< prefix=COGL_FRAMEBUFFER_ERROR >*/
 CoglBool
 cogl_is_framebuffer (void *object);
 
+int
+cogl_framebuffer_get_prime_fd (CoglFramebuffer *framebuffer);
+
 COGL_END_DECLS
 
 #endif /* __COGL_FRAMEBUFFER_H */
diff --git a/cogl/winsys/cogl-winsys-egl-kms.c b/cogl/winsys/cogl-winsys-egl-kms.c
index c5d014ad..3cf331c0 100644
--- a/cogl/winsys/cogl-winsys-egl-kms.c
+++ b/cogl/winsys/cogl-winsys-egl-kms.c
@@ -61,6 +61,7 @@
 #include "cogl-version.h"
 #include "cogl-error-private.h"
 #include "cogl-poll-private.h"
+#include "cogl-frame-info-private.h"
 
 static const CoglWinsysEGLVtable _cogl_winsys_egl_vtable;
 
@@ -907,6 +908,7 @@ _cogl_winsys_onscreen_swap_buffers_with_damage (CoglOnscreen *onscreen,
       kms_onscreen->surface = kms_onscreen->pending_surface;
       kms_onscreen->pending_surface = NULL;
     }
+
   /* Now we need to set the CRTC to whatever is the front buffer */
   kms_onscreen->next_bo = gbm_surface_lock_front_buffer (kms_onscreen->surface);
 
@@ -1188,6 +1190,30 @@ cogl_kms_renderer_get_kms_fd (CoglRenderer *renderer)
     return -1;
 }
 
+int
+cogl_framebuffer_get_prime_fd (CoglFramebuffer *framebuffer)
+{
+  CoglOnscreen *onscreen = COGL_ONSCREEN (framebuffer);
+  CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
+  CoglOnscreenKMS *kms_onscreen = egl_onscreen->platform;
+  CoglContext *context = framebuffer->context;
+  CoglRenderer *renderer = context->display->renderer;
+  CoglRendererEGL *egl_renderer = renderer->winsys;
+  CoglRendererKMS *kms_renderer = egl_renderer->platform;
+  int fd;
+
+  if (drmPrimeHandleToFD (kms_renderer->fd,
+                          kms_onscreen->current_fb_id,
+                          DRM_CLOEXEC,
+                          &fd))
+    {
+      g_warning ("Failed to create prime fd");
+      return -1;
+    }
+
+  return fd;
+}
+
 void
 cogl_kms_display_queue_modes_reset (CoglDisplay *display)
 {