Add logging utility methods

Change-Id: I0f316830dcc0bbf438292a6d0fbe9f8154368500
diff --git a/libs/hwui/utils/GLUtils.cpp b/libs/hwui/utils/GLUtils.cpp
new file mode 100644
index 0000000..9b298ca
--- /dev/null
+++ b/libs/hwui/utils/GLUtils.cpp
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "OpenGLRenderer"
+
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+#include <utils/Log.h>
+
+#include "GLUtils.h"
+
+namespace android {
+namespace uirenderer {
+
+void GLUtils::dumpGLErrors() {
+    GLenum status = GL_NO_ERROR;
+    while ((status = glGetError()) != GL_NO_ERROR) {
+        switch (status) {
+        case GL_INVALID_ENUM:
+            ALOGE("GL error:  GL_INVALID_ENUM");
+            break;
+        case GL_INVALID_VALUE:
+            ALOGE("GL error:  GL_INVALID_VALUE");
+            break;
+        case GL_INVALID_OPERATION:
+            ALOGE("GL error:  GL_INVALID_OPERATION");
+            break;
+        case GL_OUT_OF_MEMORY:
+            ALOGE("GL error:  Out of memory!");
+            break;
+        default:
+            ALOGE("GL error: 0x%x", status);
+        }
+    }
+}
+
+}; // namespace uirenderer
+}; // namespace android
diff --git a/libs/hwui/utils/GLUtils.h b/libs/hwui/utils/GLUtils.h
new file mode 100644
index 0000000..890e374
--- /dev/null
+++ b/libs/hwui/utils/GLUtils.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef GLUTILS_H
+#define GLUTILS_H
+
+namespace android {
+namespace uirenderer {
+
+class GLUtils {
+private:
+public:
+    /**
+     * Print out any GL errors with ALOGE
+     */
+    static void dumpGLErrors();
+
+}; // class GLUtils
+
+} /* namespace uirenderer */
+} /* namespace android */
+
+#endif /* GLUTILS_H */
diff --git a/libs/hwui/utils/MathUtils.h b/libs/hwui/utils/MathUtils.h
index 7deabe9..8ba44dc 100644
--- a/libs/hwui/utils/MathUtils.h
+++ b/libs/hwui/utils/MathUtils.h
@@ -38,4 +38,4 @@
 } /* namespace uirenderer */
 } /* namespace android */
 
-#endif /* RENDERNODE_H */
+#endif /* MATHUTILS_H */