//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//=============================================================================

#ifndef PROCEDURALTEXTUREPANEL_H
#define PROCEDURALTEXTUREPANEL_H

#ifdef _WIN32
#pragma once
#endif

#include "materialsystem/MaterialSystemUtil.h"
#include "materialsystem/itexture.h"
#include "vgui_controls/EditablePanel.h"

//-----------------------------------------------------------------------------
// Forward declarations
//-----------------------------------------------------------------------------
struct BGRA8888_t;

//-----------------------------------------------------------------------------
//
// Procedural texture image panel
//
//-----------------------------------------------------------------------------
class CProceduralTexturePanel : public vgui::EditablePanel,
                                public ITextureRegenerator {
    DECLARE_CLASS_SIMPLE(CProceduralTexturePanel, vgui::EditablePanel);

   public:
    // constructor
    CProceduralTexturePanel(vgui::Panel *pParent, const char *pName);
    ~CProceduralTexturePanel();

    // Methods of ITextureRegenerator
    virtual void Release() {}
    virtual void RegenerateTextureBits(ITexture *pTexture,
                                       IVTFTexture *pVTFTexture, Rect_t *pRect);

    // initialization, shutdown
    virtual bool Init(int nWidth, int nHeight, bool bAllocateImageBuffer);
    virtual void Shutdown();

    // Returns the image buffer + dimensions
    BGRA8888_t *GetImageBuffer();
    int GetImageWidth() const;
    int GetImageHeight() const;

    // Redownloads the procedural texture
    void DownloadTexture();

    // Sets the rectangle to paint. Use null to fill the entire panel
    void SetPaintRect(const Rect_t *pPaintRect = NULL);

    // Sets the texcoords to use with the procedural texture
    void SetTextureSubRect(const Rect_t &subRect);

    // Maintain proportions when drawing
    void MaintainProportions(bool bEnable);

    virtual void Paint(void);
    virtual void PaintBackground(void) {}

   private:
    void CleanUp();

   protected:
    // Image buffer
    BGRA8888_t *m_pImageBuffer;
    int m_nWidth;
    int m_nHeight;

    // Paint rectangle
    Rect_t m_PaintRect;

    // Texture coordinate rectangle
    Rect_t m_TextureSubRect;

    CTextureReference m_ProceduralTexture;
    CMaterialReference m_ProceduralMaterial;

    int m_nTextureID;
    bool m_bMaintainProportions;
    bool m_bUsePaintRect;
};

#endif  // PROCEDURALTEXTUREPANEL_H