Separate rendering into its own module

src/main/java/com/replaymod/render/frame/CubicOpenGlFrame.java

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+package com.replaymod.render.frame;
+
+import com.replaymod.render.rendering.Frame;
+import lombok.Getter;
+import org.apache.commons.lang3.Validate;
+
+public class CubicOpenGlFrame implements Frame {
+    @Getter
+    private final OpenGlFrame left, right, front, back, top, bottom;
+
+    public CubicOpenGlFrame(OpenGlFrame left, OpenGlFrame right, OpenGlFrame front, OpenGlFrame back, OpenGlFrame top, OpenGlFrame bottom) {
+        Validate.isTrue(left.getFrameId() == right.getFrameId()
+                && right.getFrameId() == front.getFrameId()
+                && front.getFrameId() == back.getFrameId()
+                && back.getFrameId() == top.getFrameId()
+                && top.getFrameId() == bottom.getFrameId(), "Frame ids do not match.");
+        Validate.isTrue(left.getByteBuffer().remaining() == right.getByteBuffer().remaining()
+                && right.getByteBuffer().remaining() == front.getByteBuffer().remaining()
+                && front.getByteBuffer().remaining() == back.getByteBuffer().remaining()
+                && back.getByteBuffer().remaining() == top.getByteBuffer().remaining()
+                && top.getByteBuffer().remaining() == bottom.getByteBuffer().remaining(), "Buffer size does not match.");
+        this.left = left;
+        this.right = right;
+        this.front = front;
+        this.back = back;
+        this.top = top;
+        this.bottom = bottom;
+    }
+
+    @Override
+    public int getFrameId() {
+        return left.getFrameId();
+    }
+}

src/main/java/com/replaymod/render/frame/OpenGlFrame.java

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+package com.replaymod.render.frame;
+
+import com.replaymod.render.rendering.Frame;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import org.lwjgl.util.ReadableDimension;
+
+import java.nio.ByteBuffer;
+
+@RequiredArgsConstructor
+public class OpenGlFrame implements Frame {
+    @Getter
+    private final int frameId;
+
+    @Getter
+    private final ReadableDimension size;
+
+    @Getter
+    private final ByteBuffer byteBuffer;
+}

src/main/java/com/replaymod/render/frame/RGBFrame.java

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+package com.replaymod.render.frame;
+
+import com.replaymod.render.rendering.Frame;
+import lombok.Getter;
+import org.apache.commons.lang3.Validate;
+import org.lwjgl.util.ReadableDimension;
+
+import java.nio.ByteBuffer;
+
+public class RGBFrame implements Frame {
+    @Getter
+    private final int frameId;
+
+    @Getter
+    private final ReadableDimension size;
+
+    @Getter
+    private final ByteBuffer byteBuffer;
+
+    public RGBFrame(int frameId, ReadableDimension size, ByteBuffer byteBuffer) {
+        Validate.isTrue(size.getWidth() * size.getHeight() * 3 == byteBuffer.remaining(),
+                "Buffer size is %d (cap: %d) but should be %d",
+                byteBuffer.remaining(), byteBuffer.capacity(), size.getWidth() * size.getHeight() * 3);
+        this.frameId = frameId;
+        this.size = size;
+        this.byteBuffer = byteBuffer;
+    }
+}

src/main/java/com/replaymod/render/frame/StereoscopicOpenGlFrame.java

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+package com.replaymod.render.frame;
+
+import com.replaymod.render.rendering.Frame;
+import lombok.Getter;
+import org.apache.commons.lang3.Validate;
+
+public class StereoscopicOpenGlFrame implements Frame {
+    @Getter
+    private final OpenGlFrame left, right;
+
+    public StereoscopicOpenGlFrame(OpenGlFrame left, OpenGlFrame right) {
+        Validate.isTrue(left.getFrameId() == right.getFrameId(), "Frame ids do not match.");
+        Validate.isTrue(left.getByteBuffer().remaining() == right.getByteBuffer().remaining(), "Buffer size does not match.");
+        this.left = left;
+        this.right = right;
+    }
+
+    @Override
+    public int getFrameId() {
+        return left.getFrameId();
+    }
+}