int __stdcall GetPicture(
LPSTR buf, long len, unsigned int flag,
HANDLE *pHBInfo, HANDLE *pHBm,
SPI_PROGRESS lpPrgressCallback, long lData)
{
int ret = SPI_OTHER_ERROR;
char *data;
char *filename;
long datasize;
HANDLE hf;
DWORD ReadBytes;
if ((flag & 7) == 0) {
/* bufはファイル名 */
hf = CreateFile(buf, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
if (hf == INVALID_HANDLE_VALUE) return SPI_FILE_READ_ERROR;
datasize = GetFileSize(hf, NULL) -len;
if (datasize < HEADBUF_SIZE) {
CloseHandle(hf);
return SPI_NOT_SUPPORT;
}
if (SetFilePointer(hf, len, NULL, FILE_BEGIN) != (DWORD)len) {
CloseHandle(hf);
return SPI_FILE_READ_ERROR;
}
data = (char *)LocalAlloc(LMEM_FIXED, datasize);
if (data == NULL) {
CloseHandle(hf);
return SPI_NO_MEMORY;
}
if (!ReadFile(hf, data, datasize, &ReadBytes, NULL)) {
CloseHandle(hf);
LocalFree(data);
return SPI_FILE_READ_ERROR;
}
CloseHandle(hf);
if (ReadBytes != (DWORD)datasize) {
LocalFree(data);
return SPI_FILE_READ_ERROR;
}
filename = buf;
} else {
/* bufはファイルイメージへのポインタ */
data = buf;
datasize = len;
filename = NULL;
}
/* 一応フォーマット確認 */
if (!IsSupportedEx(filename, data)) {
ret = SPI_NOT_SUPPORT;
} else {
ret = GetPictureEx(datasize, pHBInfo, pHBm, lpPrgressCallback, lData, data);
}
if ((flag & 7) == 0) LocalFree(data);
return ret;
}
// 対応しているかどうか(対応していれば非0を返す)
unsigned int STDCALL IsSupported(const char* pSrc, unsigned int dwSize)
{
// 識別用に最低限必要なバイト数を返す
if(pSrc==NULL){
return HEADER_SIZE;
}
// メモリ入力
else if(dwSize){
return IsSupportedEx(pSrc, dwSize);
}
// ファイル入力
else{
smart_array< char > buf;
if(File2Memory(pSrc, buf, HEADER_SIZE)){
return IsSupportedEx(buf.GetPtr(), buf.GetSize(), pSrc);
}
return 0;
}
}
int __stdcall GetPictureInfo
(LPSTR buf, long len, unsigned int flag, struct PictureInfo *lpInfo)
{
int ret = SPI_OTHER_ERROR;
char headbuf[HEADBUF_SIZE];
char *data;
char *filename;
HANDLE hf;
DWORD ReadBytes;
if ((flag & 7) == 0) {
/* bufはファイル名 */
hf = CreateFile(buf, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
if (hf == INVALID_HANDLE_VALUE) return SPI_FILE_READ_ERROR;
if (SetFilePointer(hf, len, NULL, FILE_BEGIN) != (DWORD)len) {
CloseHandle(hf);
return SPI_FILE_READ_ERROR;
}
if (!ReadFile(hf, headbuf, HEADBUF_SIZE, &ReadBytes, NULL)) {
CloseHandle(hf);
return SPI_FILE_READ_ERROR;
}
CloseHandle(hf);
if (ReadBytes != HEADBUF_SIZE) return SPI_NOT_SUPPORT;
data = headbuf;
filename = buf;
} else {
/* bufはファイルイメージへのポインタ */
if (len < HEADBUF_SIZE) return SPI_NOT_SUPPORT;
data = (char *)buf;
filename = NULL;
}
/* 一応フォーマット確認 */
if (!IsSupportedEx(filename, data)) {
ret = SPI_NOT_SUPPORT;
} else {
ret = GetPictureInfoEx(data, lpInfo);
}
return ret;
}
/*-------------------------------------------------------------------------*/
int __stdcall IsSupported(LPSTR filename, DWORD dw)
{
char *data;
char buff[HEADBUF_SIZE];
DWORD ReadBytes;
if ((dw & 0xFFFF0000) == 0) {
/* dwはファイルハンドル */
if (!ReadFile((HANDLE)dw, buff, HEADBUF_SIZE, &ReadBytes, NULL)) {
return 0;
}
data = buff;
} else {
/* dwはバッファへのポインタ */
data = (char *)dw;
}
/* フォーマット確認 */
if (IsSupportedEx(filename, data)) return 1;
return 0;
}
