DtTexturedGlyphRenderer.h

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/*****************************************************************************
 * Copyright (c) 2022 MAK Technologies, Inc.
 * All rights reserved.
 *****************************************************************************/


#pragma once

#include <vrvGraphics/DtGlyphRenderer.h>
#include <vrvGraphics/DtTextured2DRenderer.h>
#include <vrvGraphics/DtOffsetColoredTexturedVertex.h>

#include <vrvMath/DtVector4.h>

#include <tbb/tbb_allocator.h>

#include <unordered_map>
#include <vector>

namespace makVrv
{

   class DT_DLL_VRVGRAPHICS DtTexturedGlyphRenderer : public DtGlyphRenderer
   {
   public:

      struct QuadVertexList
      {
         // Each quad has a position. 
         std::vector<Vector4_32> myQuadPositions;

         // Each quad (glyph) has its own texture. 
         // Each index indexes into the global array of all textures
         // Each index in the global array is a bindless address of the texture therein
         std::vector<int> myQuadTextureIndexes;

         // Each quad has 4 vertices. There are a total of myPositions.size() quads
         // So, a total of myPositions.size()*4 vertices
         std::vector< DtOffsetRotationColorTextureCoordinate, tbb::tbb_allocator<DtOffsetRotationColorTextureCoordinate> > myQuadVertices;
      };
   public:

      DtTexturedGlyphRenderer();

      virtual ~DtTexturedGlyphRenderer();

      virtual void renderGlyph( const DtPen& pen, const DtGlyph& glyph
         , int group, const float position[4], float rotation
         , int& vertexIndex, int textureIndex);
      virtual void renderGlyphWithRightToLeft(const DtPen& pen, const DtGlyph& glyph, bool rightToLeft
         , int group, const float position[4], float rotation
         , int& vertexIndex, int textureIndex);

      QuadVertexList myQuadVertexList;

   };
   
}