IG_tile_count_get

IG_tile_count_get_mem

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This function gets the number of tiles constituting a page for file formats that support tiled pages for the image files located in the memory buffer.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_tile_count_get_mem( LPVOID lpImage, AT_UINT nImageSize, UINT nPageNum, LPUINT lpTileCountH, LPUINT lpTileCountV );

Arguments:

Name	Type	Description
lpImage	LPVOID	Pointer to the start of the image file in memory.
nImageSize	AT_UINT	Size of image file in memory.
nPageNum	UINT	Page number for which to get the count of tiles.
lpTileCountH	LPUINT	Pointer to a UINT variable to receive the number of tiles horizontally (number of tiles in a row).
lpTileCountV	LPUINT	Pointer to a UINT variable to receive the number of tiles vertically (number of tiles in a column).

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:

None

Example:

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char* lpBuffer; // Memory buffer with the image AT_UINT nBufferSize; // Size of the memory buffer UINT nTileRows; // Will receive number of tile rows UINT nTileCols; // Will receive number of tile cols AT_ERRCOUNT nErrcount; // Returned count of errors // Open a file and get its size FILE* fp = NULL; fopen_s(&fp, "picture_tiled.tif", "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_tile_count_get_mem(lpBuffer, nBufferSize, 1, &nTileRows, &nTileCols ); fclose(fp); // ... // Delete memory buffer free(lpBuffer); }

Copy Code

char* lpBuffer;            // Memory buffer with the image
AT_UINT nBufferSize;    // Size of the memory buffer
UINT nTileRows;            // Will receive number of tile rows
UINT nTileCols;            // Will receive number of tile cols
AT_ERRCOUNT nErrcount;        // Returned count of errors

// Open a file and get its size
FILE* fp = NULL;
fopen_s(&fp, "picture_tiled.tif", "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_tile_count_get_mem(lpBuffer, nBufferSize, 1, &nTileRows, &nTileCols );
    fclose(fp);

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

Remarks:

Use this function when the file image is in memory.

The function returns 0 for both lpTileCountH and lpTileCountV if the image file format does not support tiled images.

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