PCX是一個比較早的圖像文件格式，它也有過一段時間的輝煌，但隨著計算機硬、軟件的發展，該圖像格式基本已成過去時，主要是因為早期PCX格式圖像是配合當時顯卡硬件而設計的，如CGA/EGA/VGA等，現在顯然已經過時了，雖然後來的版本增加了對256色和24位真彩色的支持，但仍然因其文件格式的先天不足，導致操作很不方便，如256色圖像調色板就是以“補丁”形式追加到文件最後面的，24位真彩色用以前EGA圖像卡按行以彩色面形式存放等；另外PCX的RLE編碼對6位以下像素格式是比較有效的，對目前8位為主的像素格式壓縮也不盡人意，如24位像素格式壓縮後，有時比不壓縮空間占用還大。 雖然PCX格式圖像目前使用不多，但還是有很多軟件是支持這種格式的，如Photoshop。在圖像處理編程時，偶爾也會遇到這種格式的圖像，但不象BMP、JPEG、GIF等圖像格式容易找到現存的庫函數或組件，所以本文提供了PCX格式圖像與GDI+位圖的相互轉換的代碼，本文分上下兩篇，上篇將PCX格式圖像轉換為GDI+位圖，下篇將GDI+位圖轉換為PCX格式圖像。下面是轉換源碼： [cpp] typedef struct // pcx文件頭 { BYTE flag; // 標記 BYTE version; // 版本號 BYTE encodeing; // 編碼方式 BYTE bitsPrePixel; // 平面像素位數 WORD xMin; // 最小X WORD yMin; // 最小Y WORD xMax; // 最大X WORD yMax; // 最大Y WORD hRes; // 水平分辨率 WORD vRes; // 垂直分辨率 BYTE palette[48]; // 16色調色板 BYTE reserved; // 保留 BYTE planes; // 平面數 WORD bytesPreLine; // 每行字節數 WORD paletteType; // 調色板類型。1：彩色或黑白，2：灰度 BYTE filler[58]; }PcxFileHeader, *PPcxFileHeader; //--------------------------------------------------------------------------- FORCEINLINE LPBYTE UnpackPckLine(LPBYTE dest, LPBYTE source, INT bytes) { while (bytes > 0) { if (*source > 0xc0) { INT count = *source ++ & 0x3f; BYTE c = *source ++; bytes -= count; for (; count > 0; *dest ++ = c, count --); } else { *dest ++ = *source ++; bytes --; } } return source; } //--------------------------------------------------------------------------- // 單色或256色 VOID UnpackPck(BitmapData *data, LPBYTE bitsMem, INT bytesPreLine) { LPBYTE p = (LPBYTE)data->Scan0; LPBYTE m = bitsMem; for (UINT y = 0; y < data->Height; y ++, p += data->Stride) { m = UnpackPckLine(p, m, bytesPreLine); } } //--------------------------------------------------------------------------- // 16色 VOID UnpackPck4(BitmapData *data, LPBYTE bitsMem, INT bytesPreLine) { LPBYTE p = (LPBYTE)data->Scan0; LPBYTE m = bitsMem; INT datOffset = data->Stride - ((GetPixelFormatSize(data->PixelFormat) * data->Width + 7) >> 3); if (data->Width & 1) datOffset ++; INT bytes1 = bytesPreLine; INT bytes2 = bytes1 << 1; INT bytes3 = bytes2 + bytes1; INT bytes = bytes1 << 2; LPBYTE buffer = new BYTE[bytes]; for (UINT y = 0; y < data->Height; y ++, p += datOffset) { m = UnpackPckLine(buffer, m, bytes); LPBYTE b = buffer; BYTE mask = 0x80; for (UINT x = 0; x < data->Width; x ++) { if (*b & mask) *p |= 1; if (*(b + bytes1) & mask) *p |= 2; if (*(b + bytes2) & mask) *p |= 4; if (*(b + bytes3) & mask) *p |= 8; if (x & 1) p ++; else *p <<= 4; mask >>= 1; if (!mask) { mask = 0x80; b ++; } } } delete[] buffer; } //--------------------------------------------------------------------------- // 24位真彩色 VOID UnpackPck24(BitmapData *data, LPBYTE bitsMem, INT bytesPreLine) { INT bytes1 = bytesPreLine; INT bytes2 = bytes1 << 1; INT bytes = bytes2 + bytes1; INT width = (INT)data->Width > bytesPreLine? bytesPreLine : data->Width; INT datOffset = data->Stride - width * 3; PRGBTriple p = (PRGBTriple)data->Scan0; LPBYTE m = bitsMem; LPBYTE buffer = new BYTE[bytes]; for (INT y = 0; y < (INT)data->Height; y ++, (LPBYTE)p += datOffset) { m = UnpackPckLine(buffer, m, bytes); LPBYTE b = buffer; for (INT x = 0; x < width; x ++, p ++, b ++) { p->rgbtRed = *b; p->rgbtGreen = *(b + bytes1); p->rgbtBlue = *(b + bytes2); } } delete[] buffer; } //--------------------------------------------------------------------------- Bitmap *UnpackPckImage(LPBYTE imageMem, INT imageBytes) { PcxFileHeader *header = (PcxFileHeader*)imageMem; if (header->flag != 0x0a) return NULL; PRGBTriple ppal = NULL; PixelFormat format = PixelFormatUndefined; if (header->bitsPrePixel == 1) { if (header->planes == 4) { format = PixelFormat4bppIndexed; ppal = (PRGBTriple)header->palette; } else format = PixelFormat1bppIndexed; } else { if (header->planes == 3) format = PixelFormat24bppRGB; else if (header->planes == 1) { ppal = (PRGBTriple)(imageMem + imageBytes - 256 * 3); if (*((LPBYTE)ppal - 1) == 0x0c) format = PixelFormat8bppIndexed; } } if (format == PixelFormatUndefined) return NULL; Bitmap *bmp = new Bitmap(header->xMax - header->xMin + 1, header->yMax - header->yMin + 1, format); if (ppal) { INT count = 1 << (header->bitsPrePixel * header->planes); ColorPalette *pal = (ColorPalette*)new BYTE[count * sizeof(ARGB) + sizeof(ColorPalette)]; PRGBQuad pp = (PRGBQuad)pal->Entries; for (INT i = 0; i < count; i ++) { pp[i].rgbBlue = ppal[i].rgbtRed; pp[i].rgbGreen = ppal[i].rgbtGreen; pp[i].rgbRed = ppal[i].rgbtBlue; pp[i].rgbReserved = 255; } pal->Flags = 0; pal->Count = count; bmp->SetPalette(pal); delete[] pal; } LPBYTE bitsMem = imageMem + sizeof(PcxFileHeader); BitmapData data; Gdiplus::Rect r(0, 0, bmp->GetWidth(), bmp->GetHeight()); bmp->LockBits(&r, ImageLockModeRead | ImageLockModeWrite, format, &data); switch (format) { case PixelFormat4bppIndexed: UnpackPck4(&data, bitsMem, header->bytesPreLine); break; case PixelFormat24bppRGB: UnpackPck24(&data, bitsMem, header->bytesPreLine); break; default: UnpackPck(&data, bitsMem, header->bytesPreLine); } bmp->UnlockBits(&data); return bmp; } //--------------------------------------------------------------------------- Bitmap *LoadPcxImageFromStream(IStream *stream) { LARGE_INTEGER move; ULARGE_INTEGER size; move.QuadPart = 0; if (stream->Seek(move, STREAM_SEEK_END, &size) != S_OK) return NULL; stream->Seek(move, STREAM_SEEK_SET, NULL); LPBYTE imageMem = new BYTE[size.LowPart]; Bitmap *bmp = NULL; if (stream->Read(imageMem, size.LowPart, NULL) == S_OK) bmp = UnpackPckImage(imageMem, size.LowPart); delete[] imageMem; return bmp; } //--------------------------------------------------------------------------- typedef struct // pcx文件頭 { BYTE flag; // 標記 BYTE version; // 版本號 BYTE encodeing; // 編碼方式 BYTE bitsPrePixel; // 平面像素位數 WORD xMin; // 最小X WORD yMin; // 最小Y WORD xMax; // 最大X WORD yMax; // 最大Y WORD hRes; // 水平分辨率 WORD vRes; // 垂直分辨率 BYTE palette[48]; // 16色調色板 BYTE reserved; // 保留 BYTE planes; // 平面數 WORD bytesPreLine; // 每行字節數 WORD paletteType; // 調色板類型。1：彩色或黑白，2：灰度 BYTE filler[58]; }PcxFileHeader, *PPcxFileHeader; //--------------------------------------------------------------------------- FORCEINLINE LPBYTE UnpackPckLine(LPBYTE dest, LPBYTE source, INT bytes) { while (bytes > 0) { if (*source > 0xc0) { INT count = *source ++ & 0x3f; BYTE c = *source ++; bytes -= count; for (; count > 0; *dest ++ = c, count --); } else { *dest ++ = *source ++; bytes --; } } return source; } //--------------------------------------------------------------------------- // 單色或256色 VOID UnpackPck(BitmapData *data, LPBYTE bitsMem, INT bytesPreLine) { LPBYTE p = (LPBYTE)data->Scan0; LPBYTE m = bitsMem; for (UINT y = 0; y < data->Height; y ++, p += data->Stride) { m = UnpackPckLine(p, m, bytesPreLine); } } //--------------------------------------------------------------------------- // 16色 VOID UnpackPck4(BitmapData *data, LPBYTE bitsMem, INT bytesPreLine) { LPBYTE p = (LPBYTE)data->Scan0; LPBYTE m = bitsMem; INT datOffset = data->Stride - ((GetPixelFormatSize(data->PixelFormat) * data->Width + 7) >> 3); if (data->Width & 1) datOffset ++; INT bytes1 = bytesPreLine; INT bytes2 = bytes1 << 1; INT bytes3 = bytes2 + bytes1; INT bytes = bytes1 << 2; LPBYTE buffer = new BYTE[bytes]; for (UINT y = 0; y < data->Height; y ++, p += datOffset) { m = UnpackPckLine(buffer, m, bytes); LPBYTE b = buffer; BYTE mask = 0x80; for (UINT x = 0; x < data->Width; x ++) { if (*b & mask) *p |= 1; if (*(b + bytes1) & mask) *p |= 2; if (*(b + bytes2) & mask) *p |= 4; if (*(b + bytes3) & mask) *p |= 8; if (x & 1) p ++; else *p <<= 4; mask >>= 1; if (!mask) { mask = 0x80; b ++; } } } delete[] buffer; } //--------------------------------------------------------------------------- // 24位真彩色 VOID UnpackPck24(BitmapData *data, LPBYTE bitsMem, INT bytesPreLine) { INT bytes1 = bytesPreLine; INT bytes2 = bytes1 << 1; INT bytes = bytes2 + bytes1; INT width = (INT)data->Width > bytesPreLine? bytesPreLine : data->Width; INT datOffset = data->Stride - width * 3; PRGBTriple p = (PRGBTriple)data->Scan0; LPBYTE m = bitsMem; LPBYTE buffer = new BYTE[bytes]; for (INT y = 0; y < (INT)data->Height; y ++, (LPBYTE)p += datOffset) { m = UnpackPckLine(buffer, m, bytes); LPBYTE b = buffer; for (INT x = 0; x < width; x ++, p ++, b ++) { p->rgbtRed = *b; p->rgbtGreen = *(b + bytes1); p->rgbtBlue = *(b + bytes2); } } delete[] buffer; } //--------------------------------------------------------------------------- Bitmap *UnpackPckImage(LPBYTE imageMem, INT imageBytes) { PcxFileHeader *header = (PcxFileHeader*)imageMem; if (header->flag != 0x0a) return NULL; PRGBTriple ppal = NULL; PixelFormat format = PixelFormatUndefined; if (header->bitsPrePixel == 1) { if (header->planes == 4) { format = PixelFormat4bppIndexed; ppal = (PRGBTriple)header->palette; } else format = PixelFormat1bppIndexed; } else { if (header->planes == 3) format = PixelFormat24bppRGB; else if (header->planes == 1) { ppal = (PRGBTriple)(imageMem + imageBytes - 256 * 3); if (*((LPBYTE)ppal - 1) == 0x0c) format = PixelFormat8bppIndexed; } } if (format == PixelFormatUndefined) return NULL; Bitmap *bmp = new Bitmap(header->xMax - header->xMin + 1, header->yMax - header->yMin + 1, format); if (ppal) { INT count = 1 << (header->bitsPrePixel * header->planes); ColorPalette *pal = (ColorPalette*)new BYTE[count * sizeof(ARGB) + sizeof(ColorPalette)]; PRGBQuad pp = (PRGBQuad)pal->Entries; for (INT i = 0; i < count; i ++) { pp[i].rgbBlue = ppal[i].rgbtRed; pp[i].rgbGreen = ppal[i].rgbtGreen; pp[i].rgbRed = ppal[i].rgbtBlue; pp[i].rgbReserved = 255; } pal->Flags = 0; pal->Count = count; bmp->SetPalette(pal); delete[] pal; } LPBYTE bitsMem = imageMem + sizeof(PcxFileHeader); BitmapData data; Gdiplus::Rect r(0, 0, bmp->GetWidth(), bmp->GetHeight()); bmp->LockBits(&r, ImageLockModeRead | ImageLockModeWrite, format, &data); switch (format) { case PixelFormat4bppIndexed: UnpackPck4(&data, bitsMem, header->bytesPreLine); break; case PixelFormat24bppRGB: UnpackPck24(&data, bitsMem, header->bytesPreLine); break; default: UnpackPck(&data, bitsMem, header->bytesPreLine); } bmp->UnlockBits(&data); return bmp; } //--------------------------------------------------------------------------- Bitmap *LoadPcxImageFromStream(IStream *stream) { LARGE_INTEGER move; ULARGE_INTEGER size; move.QuadPart = 0; if (stream->Seek(move, STREAM_SEEK_END, &size) != S_OK) return NULL; stream->Seek(move, STREAM_SEEK_SET, NULL); LPBYTE imageMem = new BYTE[size.LowPart]; Bitmap *bmp = NULL; if (stream->Read(imageMem, size.LowPart, NULL) == S_OK) bmp = UnpackPckImage(imageMem, size.LowPart); delete[] imageMem; return bmp; } //--------------------------------------------------------------------------- 上面代碼中，UnpackPckImage函數是核心代碼，負責對PCX格式圖像內存映像進行解析並轉換。現在版本的PCX格式圖像主要是單色、16色、256色和24位真彩色，本文代碼能准確的解析這幾種圖像。但有時也可能有些不規范圖像，如16色圖像，規范的格式應該是像素位數bitsPrePixel=1，像素平面planes=4，同時調色板數據在文件頭的palette中，這是從EGA顯示卡遺留下來的格式，但如bitsPrePixel=4，像素平面planes=1的格式描述，也同樣是16色格式，而且是符合現代16色格式的，我用Photoshop對這種格式描述做過實驗，但會顯示文件不完整的錯誤，既然是“不完整”而不是非法錯誤，證明這種16色格式描述也應該是正確的，因此我嘗試將調色板從文件頭移到文件尾，結果Photoshop果然將圖像讀出來了，但只顯示了一半的寬度，由此，我得知這是Photoshop的容錯讀取，即它忽略了bitsPrePixel=4這個描述，而是把它當256色圖像處理的，事實上，在Photoshop中是沒法正確保存16色圖像的，它總是將16色用256色方式保存的，我在UnpackPckImage函數中也采用了這種容錯方式，只要圖像尾部有調色板，就可以當256色處理；只要planes=3，就當24位真彩色讀取，而不再管其它描述。 LoadPcxImageFromStream函數只是簡單的從流讀取PCX格式圖像到內存映像而已，之所以選擇從流讀取，主要是考慮通用性。為了能從文件讀取PCX圖像，我也寫了一個不完整的文件流類，只需要前面6個接口函數能用就行了（事實上，只要Read、Write和Seek3個函數能用即可）。下面是這個文件流類和LoadPcxImageFromFile函數代碼： [cpp] class FileStream : public IStream { HANDLE handle; INT refCount; public: HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, VOID **ppvObject) { if (lstrcmp((LPTSTR)&riid, (LPTSTR)&IID_IStream) == 0 || lstrcmp((LPTSTR)&riid, (LPTSTR)&IID_IUnknown) == 0) { *ppvObject = this; AddRef(); return S_OK; } *ppvObject = NULL; return E_NOINTERFACE; } ULONG STDMETHODCALLTYPE AddRef(VOID) { refCount ++; return refCount; } ULONG STDMETHODCALLTYPE Release(VOID) { if (refCount > 0) -- refCount; if (refCount == 0) delete this; return refCount; } HRESULT STDMETHODCALLTYPE Read(VOID *pv, ULONG cb, ULONG *pcbRead) { ULONG readBytes; if (ReadFile(handle, pv, cb, &readBytes, NULL)) { if (pcbRead) *pcbRead = readBytes; return S_OK; } return E_FAIL; } HRESULT STDMETHODCALLTYPE Write(CONST VOID *pv, ULONG cb, ULONG *pcbWritten) { ULONG writeBytes; if (WriteFile(handle, pv, cb, &writeBytes, NULL)) { if (pcbWritten) *pcbWritten = writeBytes; return S_OK; } return E_FAIL; } HRESULT STDMETHODCALLTYPE Seek(LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER *plibNewPosition) { ULARGE_INTEGER pos; dlibMove.LowPart = SetFilePointer(handle, dlibMove.LowPart, &dlibMove.HighPart, dwOrigin); if (plibNewPosition) plibNewPosition->QuadPart = dlibMove.QuadPart; return dlibMove.QuadPart == -1? E_FAIL : S_OK; } HRESULT STDMETHODCALLTYPE SetSize(ULARGE_INTEGER libNewSize) { return Seek(*(LARGE_INTEGER*)&libNewSize, STREAM_SEEK_END, NULL); } HRESULT STDMETHODCALLTYPE CopyTo(IStream *pstm, ULARGE_INTEGER cb, ULARGE_INTEGER *pcbRead, ULARGE_INTEGER *pcbWritten) { return S_OK; } HRESULT STDMETHODCALLTYPE Commit(DWORD grfCommitFlags) { return S_OK; } HRESULT STDMETHODCALLTYPE Revert(VOID) { return STG_E_REVERTED; } HRESULT STDMETHODCALLTYPE LockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType) { return STG_E_INVALIDFUNCTION; } HRESULT STDMETHODCALLTYPE UnlockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType) { return STG_E_INVALIDFUNCTION; } HRESULT STDMETHODCALLTYPE Stat(STATSTG *pstatstg, DWORD grfStatFlag) { return S_OK; } HRESULT STDMETHODCALLTYPE Clone(IStream **ppstm) { return E_NOTIMPL; } public: FileStream(VOID) : refCount(0), handle((HANDLE)(-1)) {} FileStream(LPTSTR fileName, BOOL isRead) : refCount(0) { handle = CreateFile(fileName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, isRead? OPEN_EXISTING : CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); } ~FileStream(VOID) { if (handle != (HANDLE)(-1)) CloseHandle(handle); } }; //--------------------------------------------------------------------------- Bitmap *LoadPcxImageFromFile(LPTSTR fileName) { IStream *stream = new FileStream(fileName, TRUE); stream->AddRef(); Bitmap *bmp = LoadPcxImageFromStream(stream); stream->Release(); return bmp; } //--------------------------------------------------------------------------- class FileStream : public IStream { HANDLE handle; INT refCount; public: HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, VOID **ppvObject) { if (lstrcmp((LPTSTR)&riid, (LPTSTR)&IID_IStream) == 0 || lstrcmp((LPTSTR)&riid, (LPTSTR)&IID_IUnknown) == 0) { *ppvObject = this; AddRef(); return S_OK; } *ppvObject = NULL; return E_NOINTERFACE; } ULONG STDMETHODCALLTYPE AddRef(VOID) { refCount ++; return refCount; } ULONG STDMETHODCALLTYPE Release(VOID) { if (refCount > 0) -- refCount; if (refCount == 0) delete this; return refCount; } HRESULT STDMETHODCALLTYPE Read(VOID *pv, ULONG cb, ULONG *pcbRead) { ULONG readBytes; if (ReadFile(handle, pv, cb, &readBytes, NULL)) { if (pcbRead) *pcbRead = readBytes; return S_OK; } return E_FAIL; } HRESULT STDMETHODCALLTYPE Write(CONST VOID *pv, ULONG cb, ULONG *pcbWritten) { ULONG writeBytes; if (WriteFile(handle, pv, cb, &writeBytes, NULL)) { if (pcbWritten) *pcbWritten = writeBytes; return S_OK; } return E_FAIL; } HRESULT STDMETHODCALLTYPE Seek(LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER *plibNewPosition) { ULARGE_INTEGER pos; dlibMove.LowPart = SetFilePointer(handle, dlibMove.LowPart, &dlibMove.HighPart, dwOrigin); if (plibNewPosition) plibNewPosition->QuadPart = dlibMove.QuadPart; return dlibMove.QuadPart == -1? E_FAIL : S_OK; } HRESULT STDMETHODCALLTYPE SetSize(ULARGE_INTEGER libNewSize) { return Seek(*(LARGE_INTEGER*)&libNewSize, STREAM_SEEK_END, NULL); } HRESULT STDMETHODCALLTYPE CopyTo(IStream *pstm, ULARGE_INTEGER cb, ULARGE_INTEGER *pcbRead, ULARGE_INTEGER *pcbWritten) { return S_OK; } HRESULT STDMETHODCALLTYPE Commit(DWORD grfCommitFlags) { return S_OK; } HRESULT STDMETHODCALLTYPE Revert(VOID) { return STG_E_REVERTED; } HRESULT STDMETHODCALLTYPE LockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType) { return STG_E_INVALIDFUNCTION; } HRESULT STDMETHODCALLTYPE UnlockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType) { return STG_E_INVALIDFUNCTION; } HRESULT STDMETHODCALLTYPE Stat(STATSTG *pstatstg, DWORD grfStatFlag) { return S_OK; } HRESULT STDMETHODCALLTYPE Clone(IStream **ppstm) { return E_NOTIMPL; } public: FileStream(VOID) : refCount(0), handle((HANDLE)(-1)) {} FileStream(LPTSTR fileName, BOOL isRead) : refCount(0) { handle = CreateFile(fileName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, isRead? OPEN_EXISTING : CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); } ~FileStream(VOID) { if (handle != (HANDLE)(-1)) CloseHandle(handle); } }; //--------------------------------------------------------------------------- Bitmap *LoadPcxImageFromFile(LPTSTR fileName) { IStream *stream = new FileStream(fileName, TRUE); stream->AddRef(); Bitmap *bmp = LoadPcxImageFromStream(stream); stream->Release(); return bmp; } //--------------------------------------------------------------------------- 下面是個從文件讀取並顯示的例子代碼（BCB2010）： [cpp] void __fastcall TForm1::Button2Click(TObject *Sender) { Bitmap *bmp; if ((bmp = LoadPcxImageFromFile("d:\\1-1-8.pcx")) == NULL) throw new Exception("Load Image fail"); Gdiplus::Graphics *g = new Gdiplus::Graphics(Canvas->Handle); g->DrawImage(bmp, 0, 0); delete g; delete bmp; } void __fastcall TForm1::Button2Click(TObject *Sender) {www.2cto.com Bitmap *bmp; if ((bmp = LoadPcxImageFromFile("d:\\1-1-8.pcx")) == NULL) throw new Exception("Load Image fail"); Gdiplus::Graphics *g = new Gdiplus::Graphics(Canvas->Handle); g->DrawImage(bmp, 0, 0); delete g; delete bmp; } 本文沒有對PCX文件格式進行詳細講解，主要原因是這些網上可以搜索得到，雖然並不完全可靠，但參考一下是可行的，而且，我自己也沒法比網上講的更透徹了，畢竟，PCX格式圖像太“古老”了，古老的我想找幾個以前版本的文件做實驗都沒法找到，只好靠Photoshop保存，或者自己寫這種格式文件，如16色圖像Photoshop就沒法正確保存。
