android/apps: Add CanvasProof App;

platform_tools/android/apps/canvasproof/src/main/jni/org_skia_canvasproof_CreateSkiaPicture.cpp

+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "org_skia_canvasproof_CreateSkiaPicture.h"
+#include "JavaInputStream.h"
+#include "SkPicture.h"
+#include "SkPictureRecorder.h"
+
+/*
+ * Class:     org_skia_canvasproof_CreateSkiaPicture
+ * Method:    delete
+ * Signature: (J)V
+ */
+JNIEXPORT void JNICALL Java_org_skia_canvasproof_CreateSkiaPicture_deleteImpl(
+        JNIEnv* env, jclass clazz, jlong ptr) {
+    SkSafeUnref(reinterpret_cast<SkPicture*>(ptr));
+}
+
+/*
+ * Class:     org_skia_canvasproof_CreateSkiaPicture
+ * Method:    createImpl
+ * Signature: (Ljava/io/InputStream;[B)J
+ */
+JNIEXPORT jlong JNICALL Java_org_skia_canvasproof_CreateSkiaPicture_createImpl
+  (JNIEnv* env, jclass clazz, jobject inputStream, jbyteArray buffer) {
+    JavaInputStream stream(env, buffer, inputStream);
+    #if 0
+    SkAutoTUnref<SkPicture> p(SkPicture::CreateFromStream(&stream));
+    if (!p) { return 0; }
+    SkPictureRecorder recorder;
+    SkRect bounds = p->cullRect();
+    SkRTreeFactory bbh;
+    recorder.beginRecording(bounds, &bbh)->drawPicture(p);
+    return reinterpret_cast<long>(recorder.endRecordingAsPicture());
+    #else
+    return reinterpret_cast<long>(SkPicture::CreateFromStream(&stream));
+    #endif
+}