Beatmup::GDIBitmap::Impl Class Reference

A simple wrapper of IL image. More...

Public Member Functions
	Impl (Context &ctx, const wchar_t *filename)
	Impl (Context &ctx, int width, int height, PixelFormat format)
const PixelFormat	getPixelFormat () const
const int	getWidth () const
const int	getHeight () const
int	getStride () const
void	lockPixelData ()
void	unlockPixelData ()
const pixbyte *	getData (int x, int y) const
void	save (const WCHAR *filename)

Static Public Member Functions
static void	init ()
static int	GetEncoderClsid (const WCHAR *format, CLSID *pClsid)

Public Attributes
Gdiplus::Bitmap *	bitmap
Gdiplus::Rect	size
Gdiplus::BitmapData	data

Detailed Description

A simple wrapper of IL image.

Definition at line 32 of file gdi_bitmap.cpp.

Constructor & Destructor Documentation

Impl() [1/2]

Beatmup::GDIBitmap::Impl::Impl ( Context &  ctx, const wchar_t *  filename  )

inline

Definition at line 81 of file gdi_bitmap.cpp.

                                                        {
        init();
        bitmap = new Gdiplus::Bitmap(filename, 1);
        size.X = size.Y = 0;
        size.Width = bitmap->GetWidth();
        size.Height = bitmap->GetHeight();
    }

Impl() [2/2]

Beatmup::GDIBitmap::Impl::Impl ( Context &  ctx, int  width, int  height, PixelFormat  format  )

inline

Definition at line 90 of file gdi_bitmap.cpp.

                                                                         {
        init();
        Gdiplus::PixelFormat pf;
        switch (format) {
        case TripleByte:
            pf = PixelFormat24bppRGB;
            break;
 
        case QuadByte:
            pf = PixelFormat32bppARGB;
            break;
 
        default:
            throw RuntimeError("Unsupported pixel format");
        }
        bitmap = new Gdiplus::Bitmap(width, height, pf);
        size.X = size.Y = 0;
        size.Width = bitmap->GetWidth();
        size.Height = bitmap->GetHeight();
    }

Member Function Documentation

init()

static void Beatmup::GDIBitmap::Impl::init ( )

inlinestatic

Definition at line 39 of file gdi_bitmap.cpp.

                       {
        static bool gdiStartedUp = false;
        if (!gdiStartedUp) {
            // Start Gdiplus
            Gdiplus::GdiplusStartupInput gdiplusStartupInput;
            ULONG_PTR gdiplusToken;
            Gdiplus::GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
        }
    }

GetEncoderClsid()

static int Beatmup::GDIBitmap::Impl::GetEncoderClsid ( const WCHAR *  format, CLSID *  pClsid  )

inlinestatic

Definition at line 50 of file gdi_bitmap.cpp.

                                                                   {
        UINT num = 0;          // number of image encoders
        UINT size = 0;         // size of the image encoder array in bytes
 
        Gdiplus::ImageCodecInfo* pImageCodecInfo = NULL;
 
        Gdiplus::GetImageEncodersSize(&num, &size);
        if (size == 0)
            return -1;  // Failure
 
        pImageCodecInfo = (Gdiplus::ImageCodecInfo*)(malloc(size));
        if (pImageCodecInfo == NULL)
            return -1;  // Failure
 
        Gdiplus::GetImageEncoders(num, size, pImageCodecInfo);
 
        for (UINT j = 0; j < num; ++j)
        {
            if (wcscmp(pImageCodecInfo[j].MimeType, format) == 0)
            {
                *pClsid = pImageCodecInfo[j].Clsid;
                free(pImageCodecInfo);
                return j;  // Success
            }
        }
 
        free(pImageCodecInfo);
        return -1;  // Failure
    }

getPixelFormat()

const PixelFormat Beatmup::GDIBitmap::Impl::getPixelFormat ( ) const

inline

Definition at line 112 of file gdi_bitmap.cpp.

                                                    {
        switch (bitmap->GetPixelFormat()) {
            case PixelFormat8bppIndexed: return SingleByte;
            case PixelFormat24bppRGB: return TripleByte;
            case PixelFormat32bppARGB: return QuadByte;
        }
        throw RuntimeError("Unsupported pixel format");
    }

getWidth()

const int Beatmup::GDIBitmap::Impl::getWidth ( ) const

inline

Definition at line 122 of file gdi_bitmap.cpp.

                                      {
        return size.Width;
    }

getHeight()

const int Beatmup::GDIBitmap::Impl::getHeight ( ) const

inline

Definition at line 127 of file gdi_bitmap.cpp.

                                       {
        return size.Height;
    }

getStride()

int Beatmup::GDIBitmap::Impl::getStride ( ) const

inline

Definition at line 132 of file gdi_bitmap.cpp.

                                 {
        return ceili(getBitsPerPixel() * getWidth(), 32) / 8;
    }

lockPixelData()

void Beatmup::GDIBitmap::Impl::lockPixelData ( )

inline

Definition at line 137 of file gdi_bitmap.cpp.

                                {
        bitmap->LockBits(&size, Gdiplus::ImageLockModeRead | Gdiplus::ImageLockModeWrite, bitmap->GetPixelFormat(), &data);
    }

unlockPixelData()

void Beatmup::GDIBitmap::Impl::unlockPixelData ( )

inline

Definition at line 142 of file gdi_bitmap.cpp.

                                  {
        bitmap->UnlockBits(&data);
    }

getData()

const pixbyte* Beatmup::GDIBitmap::Impl::getData ( int  x, int  y  ) const

inline

Definition at line 147 of file gdi_bitmap.cpp.

                                                      {
        return (const pixbyte*)data.Scan0 + x + y * data.Stride;
    }

save()

void Beatmup::GDIBitmap::Impl::save ( const WCHAR *  filename )

inline

Definition at line 152 of file gdi_bitmap.cpp.

                                            {
        CLSID clsid;
        if (wcsstr(filename, L".jpg") || wcsstr(filename, L".jpeg")) {
            if (GetEncoderClsid(L"image/jpeg", &clsid) < 0)
                throw Beatmup::RuntimeError("Unable to get encoder class id");
        }
        else if (wcsstr(filename, L".png")) {
            if (GetEncoderClsid(L"image/png", &clsid) < 0)
                throw Beatmup::RuntimeError("Unable to get encoder class id");
        }
        bitmap->Save(filename, &clsid);
    }

Member Data Documentation

bitmap

Gdiplus::Bitmap* Beatmup::GDIBitmap::Impl::bitmap

Definition at line 34 of file gdi_bitmap.cpp.

size

Gdiplus::Rect Beatmup::GDIBitmap::Impl::size

Definition at line 35 of file gdi_bitmap.cpp.

data

Gdiplus::BitmapData Beatmup::GDIBitmap::Impl::data

Definition at line 36 of file gdi_bitmap.cpp.

---

The documentation for this class was generated from the following file:

• core/bitmap/platform_specific/gdi_bitmap.cpp