vtBitmap.h

//
// vtBitmap.h
//
// Copyright (c) 2003-2008 Virtual Terrain Project
// Free for all uses, see license.txt for details.
//

#ifndef VTBITMAP_H
#define VTBITMAP_H

#include "vtdata/vtDIB.h"

// wxWidgets 2.9.x and USE_DIBSECTIONS draws upside-down bitmaps.  Until it's
// figured out, we disable DIBSECTIONS for newer wx.
#if WIN32 && (wxVERSION_NUMBER < 2900)
#define USE_DIBSECTIONS 1
#endif

class vtBitmap : public vtBitmapBase
{
public:
    vtBitmap();
    virtual ~vtBitmap();

    bool Allocate(int iXSize, int iYSize, int iDepth = 24);
    bool IsAllocated() const;
    void SetPixel24(int x, int y, uchar r, uchar g, uchar b);
    void SetPixel24(int x, int y, const RGBi &rgb)
    {
        SetPixel24(x, y, rgb.r, rgb.g, rgb.b);
    }
    void GetPixel24(int x, int y, RGBi &rgb) const;

    void SetPixel32(int x, int y, const RGBAi &rgba);
    void GetPixel32(int x, int y, RGBAi &rgba) const;

    uchar GetPixel8(int x, int y) const;
    void SetPixel8(int x, int y, uchar color);

    uint GetWidth() const;
    uint GetHeight() const;
    uint GetDepth() const;

    void ContentsChanged();

    bool ReadPNGFromMemory(uchar *buf, int len);
    bool WriteJPEG(const char *fname, int quality);

    wxBitmap    *m_pBitmap;

protected:
    bool Allocate8(int iXSize, int iYSize);
    bool Allocate24(int iXSize, int iYSize);

#if USE_DIBSECTIONS
    // A DIBSection is a special kind of bitmap, handled as a HBITMAP,
    //  created with special methods, and accessed as a giant raw
    //  memory array.
    uchar *m_pScanline;
    int m_iScanlineWidth;
#else
    // For non-Windows platforms, or Windows platforms if we're being more
    //  cautious, the Bitmap is device-dependent and therefore can't be
    //  relied upon to store data the way we expect.  Hence, we must have
    //  both a wxImage (portable and easy to use, but can't be directly
    //  rendered) and a wxBitmap (which can be drawn to the window).
    //
    // This is less memory efficient and slower.
    //
    wxImage     *m_pImage;
#endif
};

#endif // VTBITMAP_H