Move getPbufferCaps to DisplayImplementation. Mac OS X pbuffer support

src/java/org/lwjgl/opengl/DisplayImplementation.java

@@ -234,4 +234,7 @@ public interface DisplayImplementation {
 	public Object createCursor(int width, int height, int xHotspot, int yHotspot, int numImages, IntBuffer images, IntBuffer delays) throws LWJGLException;
 
 	public void destroyCursor(Object cursor_handle);
+
+	/* Pbuffer caps */
+	public int getPbufferCaps();
 }

src/java/org/lwjgl/opengl/LinuxDisplay.java

@@ -102,4 +102,5 @@ final class LinuxDisplay implements DisplayImplementation {
 	}
 
 	public native void destroyCursor(Object cursorHandle);
+	public native int getPbufferCaps();
 }

src/java/org/lwjgl/opengl/MacOSXDisplay.java

@@ -376,6 +376,10 @@ final class MacOSXDisplay implements DisplayImplementation {
 	public void destroyCursor(Object cursor_handle) {
 	}
 
+	public int getPbufferCaps() {
+		return GL11.glGetString(GL11.GL_EXTENSIONS).indexOf("GL_APPLE_pixel_buffer") != -1 ? Pbuffer.PBUFFER_SUPPORTED : 0;
+	}
+
 	/**
 	 * This class captures com.apple.eawt.ApplicationEvents through reflection
 	 * to enable compilation on other platforms than Mac OS X

src/java/org/lwjgl/opengl/Pbuffer.java

@@ -236,7 +236,9 @@ public final class Pbuffer {
 	 *
 	 * @return a bitmask of Pbuffer capabilities.
 	 */
-	public static native int getPbufferCaps();
+	public static int getPbufferCaps() {
+		return Display.getImplementation().getPbufferCaps();
+	}
 
 	/**
 	 * Native method to create a Pbuffer

src/java/org/lwjgl/opengl/Win32Display.java

@@ -102,4 +102,5 @@ final class Win32Display implements DisplayImplementation {
 	}
 
 	public native void destroyCursor(Object cursorHandle);
+	public native int getPbufferCaps();
 }