OpenSpace/modules/globebrowsing/rendering/gpulayermanager.h

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* OpenSpace                                                                             *
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* Copyright (c) 2014-2016                                                               *
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#ifndef __GPU_LAYER_MANAGER_H__
#define __GPU_LAYER_MANAGER_H__

#include <modules/globebrowsing/tile/tileindex.h>
#include <modules/globebrowsing/tile/chunktile.h>
#include <modules/globebrowsing/rendering/layermanager.h>

#include <openspace/util/gpudata.h>

#include <glm/glm.hpp>

#include <vector>

namespace ghoul{
namespace opengl{
    class ProgramObject;
}//namespace opengl
}//namespace ghoul

namespace openspace {
namespace globebrowsing {

using namespace ghoul::opengl;

class GPUTileUvTransform {
public:
	void setValue(ProgramObject* programObject, const TileUvTransform& uvTransform);
	void updateUniformLocations(
        ProgramObject* programObject,
        const std::string& nameBase);
	
private:
	GPUData<glm::vec2> gpuUvOffset;
	GPUData<glm::vec2> gpuUvScale;
};

class GPUTileDepthTransform {
public:
    void setValue(ProgramObject* programObject, const TileDepthTransform& depthTransform);
    void updateUniformLocations(
        ProgramObject* programObject,
        const std::string& nameBase);
    
private:
    GPUData<float> gpuDepthOffset;
    GPUData<float> gpuDepthScale;
};

class GPUChunkTile {
public:
	void setValue(ProgramObject* programObject, const ChunkTile& chunkTile);
	void updateUniformLocations(
        ProgramObject* programObject,
        const std::string& nameBase);
    void deactivate();

private:
	GPUTexture gpuTexture;
	GPUTileUvTransform gpuTileUvTransform;
};

class GPUChunkTilePile{
public:    
    void setValue(ProgramObject* programObject, const ChunkTilePile& chunkTilePile);
    void updateUniformLocations(
        ProgramObject* programObject,
        const std::string& nameBase,
        int pileSize);
    void deactivate();

private:
    std::vector<GPUChunkTile> gpuChunkTiles;
};

class LayerRenderSettings;
class GPULayerRenderSettings{
public:
    void setValue(ProgramObject* programObject, const LayerRenderSettings& layerSettings);
    void updateUniformLocations(
        ProgramObject* programObject,
        const std::string& nameBase);

private:
    GPUData<float> gpuOpacity;
    GPUData<float> gpuGamma;
    GPUData<float> gpuMultiplier;
};

class Layer;
class GPULayer {
public:
    virtual void setValue(
        ProgramObject* programObject,
        const Layer& layer,
        const TileIndex& tileIndex,
        int pileSize);
    virtual void updateUniformLocations(
        ProgramObject* programObject,
        const Layer& layer,
        const std::string& nameBase,
        int pileSize);
    virtual void deactivate();
private:
    GPUChunkTilePile gpuChunkTilePile;
    GPULayerRenderSettings gpuRenderSettings;
};

class GPUHeightLayer : public GPULayer{
public:
    virtual void setValue(
        ProgramObject* programObject,
        const Layer& layer,
        const TileIndex& tileIndex,
        int pileSize);
    virtual void updateUniformLocations(
        ProgramObject* programObject,
        const Layer& layer,
        const std::string& nameBase,
        int pileSize);
private:
    GPUTileDepthTransform gpuDepthTransform;
};

class LayerGroup;
class GPULayerGroup{
public:
    virtual void setValue(
        ProgramObject* programObject,
        const LayerGroup& layerGroup,
        const TileIndex& tileIndex);
    virtual void updateUniformLocations(
        ProgramObject* programObject,
        const LayerGroup& layerGroup,
        const std::string& nameBase,
        int category);
    virtual void deactivate();
private:
    std::vector<std::unique_ptr<GPULayer>> gpuActiveLayers;
};

class LayerManager;
class GPULayerManager{
public:    
    virtual void setValue(
        ProgramObject* programObject,
        const LayerManager& layerManager,
        const TileIndex& tileIndex);
    virtual void updateUniformLocations(
        ProgramObject* programObject,
        const LayerManager& layerManager);
    virtual void deactivate();
private:
    std::vector<std::unique_ptr<GPULayerGroup>> gpuLayerGroups;
};

} // namespace globebrowsing
} // namespace openspace
#endif  // __GPU_LAYER_MANAGER_H__