EGL: Use cache sizes defined in the BoardConfig

This change introduces two new BoardConfig variables to control the size
limits of the EGL blob cache.  MAX_EGL_CACHE_ENTRY_SIZE is the size
limit for values inserted into the cache, and MAX_EGL_CACHE_SIZE is the
size limit for all entries in the entire cache (including both keys and
values).  If either of these BoardConfig variables are not defined then
a default size limit is used instead.

Change-Id: I6703d93f966b6389c6499f23d841e42339f9c9d7

Author: Jamie Gennis

opengl/libs/Android.mk

@@ -44,10 +44,17 @@ ifeq ($(ARCH_ARM_HAVE_TLS_REGISTER),true)
   LOCAL_CFLAGS += -DHAVE_ARM_TLS_REGISTER
 endif
 
+ifneq ($(MAX_EGL_CACHE_ENTRY_SIZE),)
+  LOCAL_CFLAGS += -DMAX_EGL_CACHE_ENTRY_SIZE=$(MAX_EGL_CACHE_ENTRY_SIZE)
+endif
+
+ifneq ($(MAX_EGL_CACHE_SIZE),)
+  LOCAL_CFLAGS += -DMAX_EGL_CACHE_SIZE=$(MAX_EGL_CACHE_SIZE)
+endif
+
 include $(BUILD_SHARED_LIBRARY)
 installed_libEGL := $(LOCAL_INSTALLED_MODULE)
 
-
 # OpenGL drivers config file
 ifneq ($(BOARD_EGL_CFG),)
 

opengl/libs/EGL/egl_cache.cpp

@@ -25,10 +25,18 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#ifndef MAX_EGL_CACHE_ENTRY_SIZE
+#define MAX_EGL_CACHE_ENTRY_SIZE (16 * 1024);
+#endif
+
+#ifndef MAX_EGL_CACHE_SIZE
+#define MAX_EGL_CACHE_SIZE (64 * 1024);
+#endif
+
 // Cache size limits.
 static const size_t maxKeySize = 1024;
-static const size_t maxValueSize = 4096;
-static const size_t maxTotalSize = 64 * 1024;
+static const size_t maxValueSize = MAX_EGL_CACHE_ENTRY_SIZE;
+static const size_t maxTotalSize = MAX_EGL_CACHE_SIZE;
 
 // Cache file header
 static const char* cacheFileMagic = "EGL$";