IG_page_count_get

This function obtains the number of pages in the memory image file.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_page_count_get_mem( LPVOID lpImage, AT_UINT nImageSize, LPUINT lpPageCount );

Arguments:

Name	Type	Description
lpImage	LPVOID	Pointer to start of file image in memory.
nImageSize	AT_UINT	Size of image in memory.
lpPageCount	LPUINT	Pointer to a UINT variable to receive page count.

Return Value:

Returns 0 if successful. Otherwise, returns the number of ImageGear errors that occurred during this function call.

Supported Raster Image Formats:

All pixel formats supported by ImageGear for C and C++.

Sample:

Memory IO

Example:

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char* lpBuffer; // Memory buffer with the image AT_UINT nBufferSize; // Size of the memory buffer UINT nPageCount; // Will receive number of pages AT_ERRCOUNT nErrcount; // Returned count of errors // Open a file and get its size FILE* fp = NULL; fopen_s(&fp, "picture.bmp", "rb"); if(fp != NULL) { fseek(fp, 0, SEEK_END); nBufferSize = (AT_UINT)ftell(fp); fseek(fp, 0, SEEK_SET); // Allocate memory and read the image into the memory buffer lpBuffer = (char*)malloc(nBufferSize); fread(lpBuffer, 1, nBufferSize, fp); // File is no longer needed - close it fclose(fp); // Get image info nErrcount = IG_page_count_get_mem(lpBuffer, nBufferSize, &nPageCount); fclose(fp); // ... // Delete memory buffer free(lpBuffer); }

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char* lpBuffer;            // Memory buffer with the image
AT_UINT nBufferSize;    // Size of the memory buffer
UINT nPageCount;        // Will receive number of pages
AT_ERRCOUNT nErrcount;        // Returned count of errors

// Open a file and get its size
FILE* fp = NULL;
fopen_s(&fp, "picture.bmp", "rb");
if(fp != NULL)
{
    fseek(fp, 0, SEEK_END);
    nBufferSize = (AT_UINT)ftell(fp);
    fseek(fp, 0, SEEK_SET);
    // Allocate memory and read the image into the memory buffer
    lpBuffer = (char*)malloc(nBufferSize);
    fread(lpBuffer, 1, nBufferSize, fp);
    // File is no longer needed - close it
    fclose(fp);
    // Get image info
    nErrcount = IG_page_count_get_mem(lpBuffer, nBufferSize, &nPageCount);
    fclose(fp);

    // ...
    // Delete memory buffer
    free(lpBuffer);
}

Remarks:

See also functions IG_page_count_get_FD and IG_page_count_get.