add a way to access the version string of the h/w implementation of EGL

we use a hidden egl extension. the version string is printed
in SF's dumpsys log.

Change-Id: I123eb4bde6de462bb2404c67b74d6d6219a48d6a

3 files changed, 19 insertions, 2 deletions

diff --git a/opengl/libs/EGL/eglApi.cpp b/opengl/libs/EGL/eglApi.cpp
index a63d5b054d00..2b0ed5dfd654 100644
--- a/opengl/libs/EGL/eglApi.cpp
+++ b/opengl/libs/EGL/eglApi.cpp
@@ -49,6 +49,8 @@ using namespace android;
 
 // ----------------------------------------------------------------------------
 
+#define EGL_VERSION_HW_ANDROID  0x3143
+
 struct extention_map_t {
     const char* name;
     __eglMustCastToProperFunctionPointerType address;
@@ -972,6 +974,12 @@ const char* eglQueryString(EGLDisplay dpy, EGLint name)
             return dp->getExtensionString();
         case EGL_CLIENT_APIS:
             return dp->getClientApiString();
+        case EGL_VERSION_HW_ANDROID: {
+            if (gEGLImpl[IMPL_HARDWARE].dso) {
+                return dp->disp[IMPL_HARDWARE].queryString.version;
+            }
+            return dp->disp[IMPL_SOFTWARE].queryString.version;
+        }
     }
     return setError(EGL_BAD_PARAMETER, (const char *)0);
 }
diff --git a/opengl/specs/README b/opengl/specs/README
index 2fa258777f7f..16b278fd49be 100644
--- a/opengl/specs/README
+++ b/opengl/specs/README
@@ -9,4 +9,5 @@ for use by Android extensions.
 0x3140               EGL_ANDROID_image_native_buffer
 0x3141               (unused)
 0x3142               EGL_ANDROID_recordable
-0x3143 - 0x314F      (unused)
+0x3143               EGL_VERSION_HW_ANDROID (internal use)
+0x3144 - 0x314F      (unused)
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 1b00e9380a62..f38e94814587 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -65,6 +65,8 @@
 #define AID_GRAPHICS 1003
 #endif
 
+#define EGL_VERSION_HW_ANDROID  0x3143
+
 #define DISPLAY_COUNT       1
 
 namespace android {
@@ -1527,7 +1529,7 @@ status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
          * Dump the layers in the purgatory
          */
 
-        const size_t purgatorySize =  mLayerPurgatory.size();
+        const size_t purgatorySize = mLayerPurgatory.size();
         snprintf(buffer, SIZE, "Purgatory state (%d entries)\n", purgatorySize);
         result.append(buffer);
         for (size_t i=0 ; i<purgatorySize ; i++) {
@@ -1548,6 +1550,12 @@ status_t SurfaceFlinger::dump(int fd, const Vector<String16>& args)
                 extensions.getRenderer(),
                 extensions.getVersion());
         result.append(buffer);
+
+        snprintf(buffer, SIZE, "EGL : %s\n",
+                eglQueryString(graphicPlane(0).getEGLDisplay(),
+                        EGL_VERSION_HW_ANDROID));
+        result.append(buffer);
+
         snprintf(buffer, SIZE, "EXTS: %s\n", extensions.getExtension());
         result.append(buffer);