ui/egl: Add egl helpers to help with synchronization

These egl helpers would be used for creating and waiting on
a sync object.

Cc: Gerd Hoffmann <[email protected]>
Reviewed-by: Gerd Hoffmann <[email protected]>
Signed-off-by: Vivek Kasireddy <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Gerd Hoffmann <[email protected]>

Author: vivekkreddy

include/ui/console.h

@@ -168,6 +168,8 @@ typedef struct QemuDmaBuf {
     uint64_t  modifier;
     uint32_t  texture;
     bool      y0_top;
+    void      *sync;
+    int       fence_fd;
 } QemuDmaBuf;
 
 typedef struct DisplayState DisplayState;

include/ui/egl-helpers.h

@@ -45,6 +45,8 @@ int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc,
 
 void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf);
 void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf);
+void egl_dmabuf_create_sync(QemuDmaBuf *dmabuf);
+void egl_dmabuf_create_fence(QemuDmaBuf *dmabuf);
 
 #endif
 

ui/egl-helpers.c

@@ -287,6 +287,32 @@ void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf)
     dmabuf->texture = 0;
 }
 
+void egl_dmabuf_create_sync(QemuDmaBuf *dmabuf)
+{
+    EGLSyncKHR sync;
+
+    if (epoxy_has_egl_extension(qemu_egl_display,
+                                "EGL_KHR_fence_sync") &&
+        epoxy_has_egl_extension(qemu_egl_display,
+                                "EGL_ANDROID_native_fence_sync")) {
+        sync = eglCreateSyncKHR(qemu_egl_display,
+                                EGL_SYNC_NATIVE_FENCE_ANDROID, NULL);
+        if (sync != EGL_NO_SYNC_KHR) {
+            dmabuf->sync = sync;
+        }
+    }
+}
+
+void egl_dmabuf_create_fence(QemuDmaBuf *dmabuf)
+{
+    if (dmabuf->sync) {
+        dmabuf->fence_fd = eglDupNativeFenceFDANDROID(qemu_egl_display,
+                                                      dmabuf->sync);
+        eglDestroySyncKHR(qemu_egl_display, dmabuf->sync);
+        dmabuf->sync = NULL;
+    }
+}
+
 #endif /* CONFIG_GBM */
 
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