Move all debug flags in a single place.

This change also adds a new memory usage flag. When turned on, the
following is printed after every frame:

D/OpenGLRenderer( 3723): Current memory usage / total memory usage (bytes):
D/OpenGLRenderer( 3723):   TextureCache          3766680 / 20971520
D/OpenGLRenderer( 3723):   LayerCache            3538944 /  8388608
D/OpenGLRenderer( 3723):   GradientCache          135168 /   524288
D/OpenGLRenderer( 3723):   PathCache               41180 /  4194304
D/OpenGLRenderer( 3723):   TextDropShadowCache         0 /  2097152
D/OpenGLRenderer( 3723):   FontRenderer 0         262144 /   262144
D/OpenGLRenderer( 3723):   FontRenderer 1         262144 /   262144
D/OpenGLRenderer( 3723):   FontRenderer 2         262144 /   262144
D/OpenGLRenderer( 3723): Other:
D/OpenGLRenderer( 3723):   FboCache                    2 /       12
D/OpenGLRenderer( 3723):   PatchCache                 31 /      512
D/OpenGLRenderer( 3723): Total memory usage:
D/OpenGLRenderer( 3723):   8268404 bytes, 7.89 MB

This should help tracking possibe memory issues.

Change-Id: I83f483ca1d2dbef904829bce368e33fe5503e8d6
diff --git a/libs/hwui/Debug.h b/libs/hwui/Debug.h
new file mode 100644
index 0000000..feaba25
--- /dev/null
+++ b/libs/hwui/Debug.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2010 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 ANDROID_HWUI_DEBUG_H
+#define ANDROID_HWUI_DEBUG_H
+
+// Turn on to check for OpenGL errors on each frame
+#define DEBUG_OPENGL 1
+
+// Turn on to enable memory usage summary on each frame
+#define DEBUG_MEMORY_USAGE 0
+
+// Turn on to enable layers debugging when renderered as regions
+#define DEBUG_LAYERS_AS_REGIONS 0
+
+// Turn on to display debug info about vertex/fragment shaders
+#define DEBUG_PROGRAMS 0
+
+// Turn on to display info about layers
+#define DEBUG_LAYERS 0
+
+// Turn on to display debug infor about 9patch objects
+#define DEBUG_PATCHES 0
+
+// Turn on to display debug info about paths
+#define DEBUG_PATHS 0
+
+// Turn on to display debug info about textures
+#define DEBUG_TEXTURES 0
+
+#endif // ANDROID_HWUI_DEBUG_H