/******************************************************************************
 * Spine Runtimes Software License v2.5
 *
 * Copyright (c) 2013-2016, Esoteric Software
 * All rights reserved.
 *
 * You are granted a perpetual, non-exclusive, non-sublicensable, and
 * non-transferable license to use, install, execute, and perform the Spine
 * Runtimes software and derivative works solely for personal or internal
 * use. Without the written permission of Esoteric Software (see Section 2 of
 * the Spine Software License Agreement), you may not (a) modify, translate,
 * adapt, or develop new applications using the Spine Runtimes or otherwise
 * create derivative works or improvements of the Spine Runtimes or (b) remove,
 * delete, alter, or obscure any trademarks or any copyright, trademark, patent,
 * or other intellectual property or proprietary rights notices on or in the
 * Software, including any copy thereof. Redistributions in binary or source
 * form must include this license and terms.
 *
 * THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL ESOTERIC SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, BUSINESS INTERRUPTION, OR LOSS OF
 * USE, DATA, OR PROFITS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *****************************************************************************/

#ifndef Spine_SkeletonClipping_h
#define Spine_SkeletonClipping_h

#include <spine/Vector.h>
#include <spine/Triangulator.h>

namespace spine {
    class Slot;
    class ClippingAttachment;
    
    class SP_API SkeletonClipping : public SpineObject {
    public:
        SkeletonClipping();

        size_t clipStart(Slot& slot, ClippingAttachment* clip);
        
        void clipEnd(Slot& slot);
        
        void clipEnd();
		
		void clipTriangles(float* vertices, unsigned short* triangles, size_t trianglesLength, float* uvs, size_t stride);
		
        void clipTriangles(Vector<float>& vertices, Vector<unsigned short>& triangles, Vector<float>& uvs, size_t stride);
        
        bool isClipping();
        
        Vector<float>& getClippedVertices();
        Vector<unsigned short>& getClippedTriangles();
        Vector<float>& getClippedUVs();
        
    private:
        Triangulator _triangulator;
        Vector<float> _clippingPolygon;
        Vector<float> _clipOutput;
        Vector<float> _clippedVertices;
        Vector<unsigned short> _clippedTriangles;
        Vector<float> _clippedUVs;
        Vector<float> _scratch;
        ClippingAttachment* _clipAttachment;
        Vector< Vector<float>* > *_clippingPolygons;
        
        /** Clips the input triangle against the convex, clockwise clipping area. If the triangle lies entirely within the clipping
                  * area, false is returned. The clipping area must duplicate the first vertex at the end of the vertices list. */
        bool clip(float x1, float y1, float x2, float y2, float x3, float y3, Vector<float>* clippingArea, Vector<float>* output);
        
        static void makeClockwise(Vector<float>& polygon);
    };
}

#endif /* Spine_SkeletonClipping_h */