AArch64: Make graphics classes 64-bit compatible

This a merger of two commits submitted to AOSP by
the following authors:

ashok.bhat@arm.com, david.butcher@arm.coma
craig.barber@arm.com, kevin.petit@arm.com and
marcus.oakland@arm.com

Due to the very large number of internal conflicts, I
have chosen to cherry-pick this change instead
of letting it merge through AOSP because the merge
conflict resolution would be very hard to review.

Commit messages below:

================================================
AArch64: Make graphics classes 64-bit compatible

Changes in this patch include

[x] Long is used to store native pointers as they can
    be 64-bit.

[x] Some minor changes have been done to conform with
    standard JNI practice (e.g. use of jint instead of int
    in JNI function prototypes)

[x] AssetAtlasManager is not completely 64-bit compatible
    yet. Specifically mAtlasMap member has to be converted
    to hold native pointer using long. Added a TODO to
    AssetAtlasManager.java to indicate the change required.

Signed-off-by: Ashok Bhat <ashok.bhat@arm.com>
Signed-off-by: Craig Barber <craig.barber@arm.com>
Signed-off-by: Kévin PETIT <kevin.petit@arm.com>
Signed-off-by: Marcus Oakland <marcus.oakland@arm.com>

==================================================================

AArch64: Use long for pointers in graphics/Camera

For storing pointers, long is used in
android/graphics/Camera class, as native
pointers can be 64-bit.

In addition, some minor changes have been done
to conform with standard JNI practice (e.g. use of
jint instead of int in JNI function prototypes)

Signed-off-by: Ashok Bhat <ashok.bhat@arm.com>
Signed-off-by: Marcus Oakland <marcus.oakland@arm.com>

===================================================================

Change-Id: Id5793fa0ebc17ee8b1eecf4b3f327977fdccff71
diff --git a/core/jni/android/graphics/MaskFilter.cpp b/core/jni/android/graphics/MaskFilter.cpp
index d954ddf..f331af7 100644
--- a/core/jni/android/graphics/MaskFilter.cpp
+++ b/core/jni/android/graphics/MaskFilter.cpp
@@ -13,18 +13,19 @@
 
 class SkMaskFilterGlue {
 public:
-    static void destructor(JNIEnv* env, jobject, SkMaskFilter* filter) {
+    static void destructor(JNIEnv* env, jobject, jlong filterHandle) {
+        SkMaskFilter* filter = reinterpret_cast<SkMaskFilter *>(filterHandle);
         SkSafeUnref(filter);
     }
 
-    static SkMaskFilter* createBlur(JNIEnv* env, jobject, float radius, int blurStyle) {
+    static jlong createBlur(JNIEnv* env, jobject, jfloat radius, jint blurStyle) {
         SkMaskFilter* filter = SkBlurMaskFilter::Create(SkFloatToScalar(radius),
                                         (SkBlurMaskFilter::BlurStyle)blurStyle);
         ThrowIAE_IfNull(env, filter);
-        return filter;
+        return reinterpret_cast<jlong>(filter);
     }
 
-    static SkMaskFilter* createEmboss(JNIEnv* env, jobject, jfloatArray dirArray, float ambient, float specular, float radius) {
+    static jlong createEmboss(JNIEnv* env, jobject, jfloatArray dirArray, jfloat ambient, jfloat specular, jfloat radius) {
         SkScalar direction[3];
 
         AutoJavaFloatArray autoDir(env, dirArray, 3);
@@ -38,39 +39,42 @@
                                                       SkFloatToScalar(specular),
                                                       SkFloatToScalar(radius));
         ThrowIAE_IfNull(env, filter);
-        return filter;
+        return reinterpret_cast<jlong>(filter);
     }
 
-    static SkMaskFilter* createTable(JNIEnv* env, jobject, jbyteArray jtable) {
+    static jlong createTable(JNIEnv* env, jobject, jbyteArray jtable) {
         AutoJavaByteArray autoTable(env, jtable, 256);
-        return new SkTableMaskFilter((const uint8_t*)autoTable.ptr());
+        SkMaskFilter* filter = new SkTableMaskFilter((const uint8_t*)autoTable.ptr());
+        return reinterpret_cast<jlong>(filter);
     }
 
-    static SkMaskFilter* createClipTable(JNIEnv* env, jobject, int min, int max) {
-        return SkTableMaskFilter::CreateClip(min, max);
+    static jlong createClipTable(JNIEnv* env, jobject, jint min, jint max) {
+        SkMaskFilter* filter = SkTableMaskFilter::CreateClip(min, max);
+        return reinterpret_cast<jlong>(filter);
     }
 
-    static SkMaskFilter* createGammaTable(JNIEnv* env, jobject, float gamma) {
-        return SkTableMaskFilter::CreateGamma(gamma);
+    static jlong createGammaTable(JNIEnv* env, jobject, jfloat gamma) {
+        SkMaskFilter* filter = SkTableMaskFilter::CreateGamma(gamma);
+        return reinterpret_cast<jlong>(filter);
     }
 };
 
 static JNINativeMethod gMaskFilterMethods[] = {
-    { "nativeDestructor",   "(I)V",     (void*)SkMaskFilterGlue::destructor      }
+    { "nativeDestructor",   "(J)V",     (void*)SkMaskFilterGlue::destructor      }
 };
 
 static JNINativeMethod gBlurMaskFilterMethods[] = {
-    { "nativeConstructor",  "(FI)I",    (void*)SkMaskFilterGlue::createBlur      }
+    { "nativeConstructor",  "(FI)J",    (void*)SkMaskFilterGlue::createBlur      }
 };
 
 static JNINativeMethod gEmbossMaskFilterMethods[] = {
-    { "nativeConstructor",  "([FFFF)I", (void*)SkMaskFilterGlue::createEmboss    }
+    { "nativeConstructor",  "([FFFF)J", (void*)SkMaskFilterGlue::createEmboss    }
 };
 
 static JNINativeMethod gTableMaskFilterMethods[] = {
-    { "nativeNewTable", "([B)I", (void*)SkMaskFilterGlue::createTable    },
-    { "nativeNewClip",  "(II)I", (void*)SkMaskFilterGlue::createClipTable    },
-    { "nativeNewGamma", "(F)I", (void*)SkMaskFilterGlue::createGammaTable    }
+    { "nativeNewTable", "([B)J", (void*)SkMaskFilterGlue::createTable    },
+    { "nativeNewClip",  "(II)J", (void*)SkMaskFilterGlue::createClipTable    },
+    { "nativeNewGamma", "(F)J", (void*)SkMaskFilterGlue::createGammaTable    }
 };
 
 #include <android_runtime/AndroidRuntime.h>