ResetDataPointer();
while (hFrameData = GetNextGraphicBlock(&nBlockLen,
&frame.m_nDelay, &frame.m_frameSize,
&frame.m_frameOffset, &frame.m_nDisposal) )
{
#ifdef GIF_TRACING
//////////////////////////////////////////////
// uncomment the following strings if you want
// to write separate frames on disk
//
// CString szName;
// szName.Format(_T("%.4d.gif"),nCurFrame);
// WriteDataOnDisk(szName,hFrameData,nBlockLen);
// nCurFrame++;
#endif // GIF_TRACING
IStream *pStream = NULL;
// delete memory on object's release
if (CreateStreamOnHGlobal(hFrameData,TRUE,&pStream) != S_OK)
{
GlobalFree(hFrameData);
continue;
};
//#define GIF_TRACING // uncomment it if you want detailed TRACEs
class CPictureEx : public CStatic
{
public:
struct TFrame // structure that keeps a single frame info
{
IPicture *m_pPicture; // pointer to the interface used for drawing
SIZE m_frameSize;
SIZE m_frameOffset;
UINT m_nDelay; // delay (in 1/100s of a second)
UINT m_nDisposal; // disposal method
};
struct TGIFHeader // GIF header
{
char m_cSignature[3]; // Signature - Identifies the GIF Data Stream
// This field contains the fixed value 'GIF'
char m_cVersion[3]; // Version number. May be one of the following:
// "87a" or "89a"
};
struct TGIFPlainTextExt // plain text extension block
{
unsigned char m_cExtIntroducer; // extension introducer (0x21)
unsigned char m_cPlainTextLabel; // text extension label (0x01)
unsigned char m_cBlockSize; // fixed value of 12
WORD m_wLeftPos; // text grid left position
WORD m_wTopPos; // text grid top position
WORD m_wGridWidth; // text grid width
WORD m_wGridHeight; // text grid height
unsigned char m_cCellWidth; // character cell width
unsigned char m_cCellHeight; // character cell height
unsigned char m_cFgColor; // text foreground color index
unsigned char m_cBkColor; // text background color index
};
struct TGIFImageDescriptor // image descriptor block
{
unsigned char m_cImageSeparator; // image separator byte (0x2C)
WORD m_wLeftPos; // image left position
WORD m_wTopPos; // image top position
WORD m_wWidth; // image width
WORD m_wHeight; // image height
unsigned char m_cPacked; // packed field
inline int GetPackedValue(enum IDPackedValues Value);
};
#pragma pack() // turn byte alignment off
public:
CPictureEx();
virtual ~CPictureEx();
void Stop(); // stops animation
void UnLoad(); // stops animation plus releases all resources
// draws the picture (starts an animation thread if needed)
BOOL Draw();
// loads a picture from a file
// i.e. Load(_T("mypic.gif"));
BOOL Load(LPCTSTR szFileName);
// loads a picture from a global memory block (allocated by GlobalAlloc)
// Warning: this function DOES NOT free the global memory, pointed to by hGlobal
BOOL Load(HGLOBAL hGlobal, DWORD dwSize);
// loads a picture from a program resource
// i.e. Load(MAKEINTRESOURCE(IDR_MYPIC),_T("GIFTYPE"));
BOOL Load(LPCTSTR szResourceName,LPCTSTR szResourceType);
我有CPictureEx这个类,但是老实说,效果也不是那么好,并不是所有得gif他都能正常显示。他得文件里面写着:
// Picture displaying control with support for the following formats:
// GIF (including animated GIF87a and GIF89a), JPEG, BMP, WMF, ICO, CUR