javafx.scene.shape.PredefinedMeshManager Maven / Gradle / Ivy
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* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package javafx.scene.shape;
import java.util.HashMap;
final class PredefinedMeshManager {
private static final PredefinedMeshManager INSTANCE = new PredefinedMeshManager();
private static final int INITAL_CAPACITY = 17; // TODO
private static final float LOAD_FACTOR = 0.75f;
private HashMap boxCache = null;
private HashMap sphereCache = null;
private HashMap cylinderCache = null;
private PredefinedMeshManager() {}
static PredefinedMeshManager getInstance() {
return INSTANCE;
}
synchronized TriangleMesh getBoxMesh(float w, float h, float d, int key) {
if (boxCache == null) {
boxCache = BoxCacheLoader.INSTANCE;
}
TriangleMesh mesh = boxCache.get(key);
if (mesh == null) {
mesh = Box.createMesh(w, h, d);
boxCache.put(key, mesh);
} else {
mesh.incRef();
}
return mesh;
}
synchronized TriangleMesh getSphereMesh(float r, int div, int key) {
if (sphereCache == null) {
sphereCache = SphereCacheLoader.INSTANCE;
}
TriangleMesh mesh = sphereCache.get(key);
if (mesh == null) {
mesh = Sphere.createMesh(div, r);
sphereCache.put(key, mesh);
} else {
mesh.incRef();
}
return mesh;
}
synchronized TriangleMesh getCylinderMesh(float h, float r, int div, int key) {
if (cylinderCache == null) {
cylinderCache = CylinderCacheLoader.INSTANCE;
}
TriangleMesh mesh = cylinderCache.get(key);
if (mesh == null) {
mesh = Cylinder.createMesh(div, h, r);
cylinderCache.put(key, mesh);
} else {
mesh.incRef();
}
return mesh;
}
synchronized void invalidateBoxMesh(int key) {
if (boxCache != null) {
TriangleMesh mesh = boxCache.get(key);
if (mesh != null) {
mesh.decRef();
int count = mesh.getRefCount();
if (count == 0) {
boxCache.remove(key);
}
}
}
}
synchronized void invalidateSphereMesh(int key) {
if (sphereCache != null) {
TriangleMesh mesh = sphereCache.get(key);
if (mesh != null) {
mesh.decRef();
int count = mesh.getRefCount();
if (count == 0) {
sphereCache.remove(key);
}
}
}
}
synchronized void invalidateCylinderMesh(int key) {
if (cylinderCache != null) {
TriangleMesh mesh = cylinderCache.get(key);
if (mesh != null) {
mesh.decRef();
int count = mesh.getRefCount();
if (count == 0) {
cylinderCache.remove(key);
}
}
}
}
synchronized void dispose() {
// just clearing references to them
if (boxCache != null) {
boxCache.clear();
}
if (sphereCache != null) {
sphereCache.clear();
}
if (cylinderCache != null) {
cylinderCache.clear();
}
}
// for testing purpose
synchronized void printStats() {
if (boxCache != null) {
System.out.println("BoxCache size: " + boxCache.size());
}
if (sphereCache != null) {
System.out.println("SphereCache size: " + sphereCache.size());
}
if (cylinderCache != null) {
System.out.println("CylinderCache size: " + cylinderCache.size());
}
}
private final static class BoxCacheLoader {
// lazy & thread-safe instantiation
private static final HashMap
INSTANCE = new HashMap(INITAL_CAPACITY, LOAD_FACTOR);
}
private final static class SphereCacheLoader {
// lazy & thread-safe instantiation
private static final HashMap
INSTANCE = new HashMap(INITAL_CAPACITY, LOAD_FACTOR);
}
private final static class CylinderCacheLoader {
// lazy & thread-safe instantiation
private static final HashMap
INSTANCE = new HashMap(INITAL_CAPACITY, LOAD_FACTOR);
}
};