/*

 * Copyright (c) 2019, 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * 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).

 *

 * You should have received a copy of the GNU General Public License version

 * 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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#ifndef VertexDataManager_h_Included

#define VertexDataManager_h_Included

#import <Metal/Metal.h>

#import "shaders/MetalShaderTypes.h"

// ---------------------------------------------------------------------

//TODO : This implementation should be redesigned as a singleton class

//TODO : Drawing optimization can be done - if current primitive-type to be 

//       drawn is equal to previous primitive-type in the list/array 

//       (Similar to previous-op in OGL)

// ---------------------------------------------------------------------

typedef struct 

{

    MTLPrimitiveType type;

    unsigned int offset_in_index_buffer;

    unsigned int no_of_indices;

    unsigned int primitiveInstances;

} MetalPrimitiveData;

void VertexDataManager_init(id<MTLDevice> device);

void VertexDataManager_addLineVertexData(MetalVertex v1, MetalVertex v2);

void VertexDataManager_addQuadVertexData(MetalVertex v1, MetalVertex v2, MetalVertex v3, MetalVertex v4);

id<MTLBuffer> VertexDataManager_getVertexBuffer();

id<MTLBuffer> VertexDataManager_getIndexBuffer();

MetalPrimitiveData** VertexDataManager_getAllPrimitives();

unsigned int VertexDataManager_getNoOfPrimitives();

void VertexDataManager_freeAllPrimitives();

// should be private

void addVertex(MetalVertex vert);

void addIndex(unsigned short vertexNum);

#endif //VertexDataManager_h_Included