ImageGear Professional for Linux
ART_mark_block_first
| ImageGear Professional > API Reference Guide > ART Component API Reference > ART Component Functions Reference > Named Block Management Functions > ART_mark_block_first |
This function gets the first block name.
|
Copy Code
|
|
|---|---|
AT_ERRCOUNT ART_mark_block_first(
HIGEAR hIGear,
ART_MARK_INDEX hMarkIndex,
LPART_BLOCK_NAME lpBlockName
);
|
|
| Name | Type | Description |
| hIGear | HIGEAR | HIGEAR handle to the image. |
| hMarkIndex | ART_MARK_INDEX | Mark identifier. |
| lpBlockName | LPART_BLOCK_NAME | A far pointer to an 8-byte array of memory that returns the type of block of the mark referenced by hMarkIndex. The block type is either an ART-defined constant beginning with ART_BLOCK or a user-defined block. See ARTAPI.H for the full list of ART-defined constants. |
Returns the number of ImageGear errors that occurred during the function call.
All pixel formats supported by ImageGear Professional.
|
Copy Code
|
|
|---|---|
HIGEAR hIGear; /* HIGEAR handle of image */ ART_MARK_INDEX hMarkIndex; /* index to mark */ ART_BLOCK_NAME lpBlockname; /* type of block */ /* to return */ CHAR szFileName[_MAX_PATH]; /* file name buffer */ DWORD dwBlockSize; /* size of a named Block */ nErrcount = ART_mark_block_first(hIGear, hMarkIndex, &lpBlockName); while (*lpBlockName) { if (!memcmp(lpBlockName, ART_BLOCK_FILENAM, sizeof(ART_BLOCK_NAME)) { nErrcount = ART_mark_block_query(hIGear, hMarkIndex, &lpBlockName, (LPVOID)szFileName, &dwBlockSize); if (!strcmp(szFileName, "Clown.tif")) { nErrcount = RT_mark_send_to_back(hIGear, hMarkIndex); } } nErrcount = ART_mark_block_next(hIGear, hMarkIndex, &lpBlockName); } |
|
The block data for the named block retrieved by calling ART_mark_block_query(). ART_mark_block_next() is called to get the name of the next named block. If there are no blocks, ART_mark_block_first() sets lpBlockName to zero.
 |
Many of ART's callback functions include the index number as a parameter. As part of your callback function, you can call ART_mark_block_first() and ART_mark_block_next() using the mark index that was passed in. |
An error is set if any of the following conditions are met: