Create a new glyph block buffer. The DgGlyphBlock object should already have been allocated by the client via DgGlyphBlock_New(). This function allocates space for a fixed-size block of glyph values. The values are initialized to zero. If there is a block buffer already allocated, the buffer is reallocated to the requested size.
Return Value
DG_OK on success. DG_ERR_BAD_CONTEXT if the context is NULL or invalid. DG_ERR_BAD_PARAM if the block is NULL. DG_ERR_NO_MEMORY if memory could not be allocated.