This function detects the format of an image located in the memory.
Declaration:
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AT_ERRCOUNT ACCUAPI IG_fltr_detect_mem( LPVOID lpImage, AT_UINT nSize, LPAT_MODE lpFileType ); |
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Arguments:
| Name | Type | Description |
| lpImage | LPVOID | Pointer to a memory buffer containing the image. |
| nSize | AT_UINT | Size of image in memory. |
| lpFileType | LPAT_MODE | Pointer to an AT_MODE variable in which the file type will be returned. See enumIGFormats for possible values. If the file format can not be detected, this parameter will return IG_FORMAT_UNKNOWN. |
Return Value:
Returns 0 if successful. Otherwise, returns the number of ImageGear errors that occurred during this function call.Supported Raster Image Formats:
This function does not process image pixels.
Sample:
None
Example:
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AT_ERRCOUNT nErrCount; // will hold returned error count AT_MODE nFormatID; AT_BYTE* lpImage = NULL; // Read an image into the memory FILE* fp; fopen_s(&fp, "picture.tif", "rb"); if(fp != NULL) { long fileSize; fseek(fp, 0, SEEK_END); fileSize = ftell(fp); fseek(fp, 0, SEEK_SET); // Allocate memory buffer lpImage = (AT_BYTE*)malloc(fileSize); if(lpImage != NULL) { // Read file into the memory fread(lpImage, 1, fileSize, fp); // Detect file format in the memory nErrCount = IG_fltr_detect_mem(lpImage, fileSize, &nFormatID); if(nFormatID == IG_FORMAT_TIF) { // ... } // Delete memory free(lpImage); } fclose(fp); } |
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Remarks:
See also the section Detecting Image File Format.