glLegacyGregoryPatchTable.h

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//
//   Copyright 2015 Pixar
//
//   Licensed under the terms set forth in the LICENSE.txt file available at
//   https://opensubdiv.org/license.
//
 
#ifndef OPENSUBDIV3_OSD_GL_LEGACY_GREGORY_PATCH_TABLE_H
#define OPENSUBDIV3_OSD_GL_LEGACY_GREGORY_PATCH_TABLE_H
 
#include "../version.h"
 
#include "../far/patchTable.h"
#include "../osd/nonCopyable.h"
 
namespace OpenSubdiv {
namespace OPENSUBDIV_VERSION {
 
namespace Osd {
 
class GLLegacyGregoryPatchTable
    : private NonCopyable<GLLegacyGregoryPatchTable> {
public:
    using ID = unsigned int;    // GLuint resource ID
 
    ~GLLegacyGregoryPatchTable();
 
    static GLLegacyGregoryPatchTable *Create(Far::PatchTable const *patchTable);
 
    void UpdateVertexBuffer(ID vbo);
 
    ID GetVertexTextureBuffer() const {
        return _vertexTextureBuffer;
    }
 
    ID GetVertexValenceTextureBuffer() const {
        return _vertexValenceTextureBuffer;
    }
 
    ID GetQuadOffsetsTextureBuffer() const {
        return _quadOffsetsTextureBuffer;
    }
 
    ID GetQuadOffsetsBase(Far::PatchDescriptor::Type type) {
        if (type == Far::PatchDescriptor::GREGORY_BOUNDARY) {
            return _quadOffsetsBase[1];
        }
        return _quadOffsetsBase[0];
    }
 
protected:
    GLLegacyGregoryPatchTable();
 
private:
    ID _vertexTextureBuffer;
    ID _vertexValenceTextureBuffer;
    ID _quadOffsetsTextureBuffer;
    ID _quadOffsetsBase[2];       // gregory, boundaryGregory
};
 
 
 
}  // end namespace Osd
 
}  // end namespace OPENSUBDIV_VERSION
using namespace OPENSUBDIV_VERSION;
 
}  // end namespace OpenSubdiv
 
#endif  // OPENSUBDIV3_OSD_GL_LEGACY_GREGORY_PATCH_TABLE_H