@@ -890,6 +890,9 @@ public void disposeNative() {
890890
891891 @ Override
892892 public boolean equals (Object obj ) {
893+ if (!(obj instanceof GLResourceTexture )) {
894+ return false ;
895+ }
893896 GLResourceTexture other = (GLResourceTexture )obj ;
894897 return other .glName == glName &&
895898 other .context == context ;
@@ -936,6 +939,9 @@ public void disposeNative() {
936939
937940 @ Override
938941 public boolean equals (Object obj ) {
942+ if (!(obj instanceof GLResourceVertexBuffer )) {
943+ return false ;
944+ }
939945 GLResourceVertexBuffer other = (GLResourceVertexBuffer )obj ;
940946 return other .glId == glId &&
941947 other .context == context ;
@@ -995,6 +1001,9 @@ public void disposeNative() {
9951001
9961002 @ Override
9971003 public boolean equals (Object obj ) {
1004+ if (!(obj instanceof GLResourceShader )) {
1005+ return false ;
1006+ }
9981007 GLResourceShader other = (GLResourceShader )obj ;
9991008 return other .glProgram == glProgram &&
10001009 other .glVertex == glVertex &&
@@ -1095,6 +1104,9 @@ public void disposeNative() {
10951104
10961105 @ Override
10971106 public boolean equals (Object obj ) {
1107+ if (!(obj instanceof GLResourceFrameBuffer )) {
1108+ return false ;
1109+ }
10981110 GLResourceFrameBuffer other = (GLResourceFrameBuffer )obj ;
10991111 return other .glFbo == glFbo &&
11001112 other .glDepth == glDepth &&
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