don't use compile-time configuration of libgui as much as possible

We now detect at runtime which sync features to use, which
allows us to remove a lot of the compile-time configuration
options. There  is still one option though, to disable
KHR_fence_sync on some devices (which are more efficient
without it).

- added a backdoor to get the vendor's EGL strings

the new logic is:
- use always ANDROID_native_fence_sync if available
- fallback to KHR_fence_sync if available and not disabled
  by the compile-time option
- use KHR_wait_sync if available and either of the above is
  enabled

Change-Id: I9c4b49d9ff1151faf902cc93bd53ea5f205aaabf

1 files changed, 2 insertions, 8 deletions

diff --git a/libs/gui/GuiConfig.cpp b/libs/gui/GuiConfig.cpp
index bafd21aaed..bc0c83c557 100644
--- a/libs/gui/GuiConfig.cpp
+++ b/libs/gui/GuiConfig.cpp
@@ -22,14 +22,8 @@ void appendGuiConfigString(String8& configStr)
 {
     static const char* config =
             " [libgui"
-#ifdef USE_FENCE_SYNC
-            " USE_FENCE_SYNC"
-#endif
-#ifdef USE_NATIVE_FENCE_SYNC
-            " USE_NATIVE_FENCE_SYNC"
-#endif
-#ifdef USE_WAIT_SYNC
-            " USE_WAIT_SYNC"
+#ifdef DONT_USE_FENCE_SYNC
+            " DONT_USE_FENCE_SYNC"
 #endif
             "]";
     configStr.append(config);