llvlcomposition.h

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#ifndef LL_LLVLCOMPOSITION_H
#define LL_LLVLCOMPOSITION_H

#include "llviewerlayer.h"
#include "llviewerimage.h"

class LLSurface;

class LLVLComposition : public LLViewerLayer
{
public:
        LLVLComposition(LLSurface *surfacep, const U32 width, const F32 scale);
        /*virtual*/ ~LLVLComposition();

        void setSurface(LLSurface *surfacep);

        // Viewer side hack to generate composition values
        BOOL generateHeights(const F32 x, const F32 y, const F32 width, const F32 height);
        BOOL generateComposition();
        // Generate texture from composition values.
        BOOL generateTexture(const F32 x, const F32 y, const F32 width, const F32 height);              

        // Use these as indeces ito the get/setters below that use 'corner'
        enum ECorner
        {
                SOUTHWEST = 0,
                SOUTHEAST = 1,
                NORTHWEST = 2,
                NORTHEAST = 3,
                CORNER_COUNT = 4
        };
        LLUUID getDetailTextureID(S32 corner);
        LLViewerImage* getDetailTexture(S32 corner);
        F32 getStartHeight(S32 corner);
        F32 getHeightRange(S32 corner);

        void setDetailTextureID(S32 corner, const LLUUID& id);
        void setStartHeight(S32 corner, F32 start_height);
        void setHeightRange(S32 corner, F32 range);

        friend class LLVOSurfacePatch;
        friend class LLDrawPoolTerrain;
        void setParamsReady()           { mParamsReady = TRUE; }
        BOOL getParamsReady() const     { return mParamsReady; }
protected:
        BOOL mParamsReady;
        LLSurface *mSurfacep;
        BOOL mTexturesLoaded;

        LLPointer<LLViewerImage> mDetailTextures[CORNER_COUNT];
        LLPointer<LLImageRaw> mRawImages[CORNER_COUNT];

        F32 mStartHeight[CORNER_COUNT];
        F32 mHeightRange[CORNER_COUNT];

        F32 mTexScaleX;
        F32 mTexScaleY;
};

#endif //LL_LLVLCOMPOSITION_H

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