3esmeshresource.h

//
// author: Kazys Stepanas
//
#ifndef _3ESMESHRESOURCE_H_
#define _3ESMESHRESOURCE_H_

#include "3es-core.h"
#include "3esresource.h"

#include "3esmatrix4.h"

namespace tes
{
  class _3es_coreAPI MeshResource : public Resource
  {
  public:
    virtual ~MeshResource() {}

    static int estimateTransferCount(size_t elementSize, unsigned byteLimit, int overhead = 0);

    uint16_t typeId() const override;

    virtual Matrix4f transform() const = 0;
    virtual uint32_t tint() const = 0;

    virtual uint8_t drawType(int stream = 0) const = 0;

    virtual unsigned vertexCount(int stream = 0) const = 0;

    virtual unsigned indexCount(int stream = 0) const = 0;

    virtual const float *vertices(unsigned &stride, int stream = 0) const = 0;

    virtual const uint8_t *indices(unsigned &stride, unsigned &width, int stream = 0) const = 0;

    virtual const float *normals(unsigned &stride, int stream = 0) const = 0;

    virtual const float *uvs(unsigned &stride, int stream = 0) const = 0;

    virtual const uint32_t *colours(unsigned &stride, int stream = 0) const = 0;

    int create(PacketWriter &packet) const override;

    int destroy(PacketWriter &packet) const override;

    int transfer(PacketWriter &packet, int byteLimit, TransferProgress &progress) const override;

    static unsigned writeIndices(PacketWriter &packet, uint32_t meshId,
                                 uint32_t offset, unsigned byteLimit,
                                 const uint8_t *dataSource, unsigned dataStride,
                                 unsigned indexByteWidth, uint32_t componentCount);

    static unsigned writeVectors3(PacketWriter &packet, uint32_t meshId,
                                 uint32_t offset, unsigned byteLimit,
                                 const uint8_t *dataSource, unsigned dataStride,
                                 uint32_t componentCount);

    static unsigned writeVectors2(PacketWriter &packet, uint32_t meshId,
                                  uint32_t offset, unsigned byteLimit,
                                  const uint8_t *dataSource, unsigned dataStride,
                                  uint32_t componentCount);

    static unsigned writeColours(PacketWriter &packet, uint32_t meshId,
                                 uint32_t offset, unsigned byteLimit,
                                 const uint8_t *dataSource, unsigned dataStride,
                                 uint32_t componentCount);

  protected:
    virtual void nextPhase(TransferProgress &progress) const;
  };
}

#endif // _3ESMESHRESOURCE_H_