mtlLegacyGregoryPatchTable.h

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//
//   Copyright 2013 Pixar
//
//   Licensed under the terms set forth in the LICENSE.txt file available at
//   https://opensubdiv.org/license.
//
 
#ifndef OPENSUBDIV3_OSD_MTL_LEGACY_GREGORY_PATCH_TABLE_H
#define OPENSUBDIV3_OSD_MTL_LEGACY_GREGORY_PATCH_TABLE_H
 
#include "../version.h"
#include "../far/patchTable.h"
#include "../osd/nonCopyable.h"
#include "../osd/mtlCommon.h"
 
@protocol MTLDevice;
@protocol MTLBuffer;
 
namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {
 
namespace Osd {
 
class MTLLegacyGregoryPatchTable
: private NonCopyable<MTLLegacyGregoryPatchTable>
{
public:
    ~MTLLegacyGregoryPatchTable();
 
    template<typename DEVICE_CONTEXT>
    static MTLLegacyGregoryPatchTable* Create(Far::PatchTable const* farPatchTable, DEVICE_CONTEXT context) {
        return Create(farPatchTable, context);
    }
 
    static MTLLegacyGregoryPatchTable* Create(Far::PatchTable const* farPatchTable, MTLContext* context);
 
    void UpdateVertexBuffer(id<MTLBuffer> vbo, int numVertices, int numVertexElements, MTLContext* context);
 
    id<MTLBuffer> GetVertexBuffer() const
    {
        return _vertexBuffer;
    }
 
    id<MTLBuffer> GetVertexValenceBuffer() const
    {
        return _vertexValenceBuffer;
    }
 
    id<MTLBuffer> GetQuadOffsetsBuffer() const
    {
        return _quadOffsetsBuffer;
    }
 
    int GetQuadOffsetsBase(Far::PatchDescriptor::Type type)
    {
        if(type == Far::PatchDescriptor::GREGORY_BOUNDARY)
            return _quadOffsetsBase[1];
        return _quadOffsetsBase[0];
    }
 
private:
    id<MTLBuffer> _vertexBuffer;
    id<MTLBuffer> _vertexValenceBuffer;
    id<MTLBuffer> _quadOffsetsBuffer;
    int _quadOffsetsBase[2];
};
 
} //end namespace Osd
 
} //end namespace OPENSUBDIV_VERSION
using namespace OPENSUBDIV_VERSION;
 
} //end namespace OpenSuddiv
 
#endif // OPENSUBDIV3_OSD_MTL_LEGACY_GREGORY_PATCH_TABLE_H