adding new file
This commit is contained in:
David Turner
parent
fb87c42c4a
commit
8a94f94672
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@ -0,0 +1,762 @@
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#include <ft2build.h>
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#include FT_INTERNAL_DEBUG_H
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#include FT_INTERNAL_UTIL_H
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/*************************************************************************/
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/* */
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/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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/* */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_memory
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** *****/
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/***** M E M O R Y M A N A G E M E N T *****/
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/***** *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/* documentation is in ftmemory.h */
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FT_BASE_DEF( FT_Error )
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FT_Alloc( FT_Memory memory,
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FT_Long size,
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void* *P )
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{
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FT_Assert( P != 0 );
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if ( size > 0 )
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{
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*P = memory->alloc( memory, size );
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if ( !*P )
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{
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FT_ERROR(( "FT_Alloc:" ));
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FT_ERROR(( " Out of memory? (%ld requested)\n",
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size ));
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return FT_Err_Out_Of_Memory;
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}
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MEM_Set( *P, 0, size );
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}
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else
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*P = NULL;
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FT_TRACE7(( "FT_Alloc:" ));
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FT_TRACE7(( " size = %ld, block = 0x%08p, ref = 0x%08p\n",
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size, *P, P ));
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return FT_Err_Ok;
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}
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/* documentation is in ftmemory.h */
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FT_BASE_DEF( FT_Error )
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FT_Realloc( FT_Memory memory,
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FT_Long current,
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FT_Long size,
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void** P )
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{
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void* Q;
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FT_Assert( P != 0 );
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/* if the original pointer is NULL, call FT_Alloc() */
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if ( !*P )
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return FT_Alloc( memory, size, P );
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/* if the new block if zero-sized, clear the current one */
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if ( size <= 0 )
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{
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FT_Free( memory, P );
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return FT_Err_Ok;
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}
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Q = memory->realloc( memory, current, size, *P );
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if ( !Q )
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goto Fail;
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if ( size > current )
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memset( (char*)Q + current, 0, size - current );
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*P = Q;
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return FT_Err_Ok;
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Fail:
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FT_ERROR(( "FT_Realloc:" ));
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FT_ERROR(( " Failed (current %ld, requested %ld)\n",
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current, size ));
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return FT_Err_Out_Of_Memory;
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}
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/* documentation is in ftmemory.h */
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FT_BASE_DEF( void )
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FT_Free( FT_Memory memory,
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void** P )
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{
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FT_TRACE7(( "FT_Free:" ));
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FT_TRACE7(( " Freeing block 0x%08p, ref 0x%08p\n",
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P, P ? *P : (void*)0 ));
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if ( P && *P )
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{
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memory->free( memory, *P );
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*P = 0;
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}
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}
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** *****/
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/***** D O U B L Y L I N K E D L I S T S *****/
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/***** *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_list
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/* documentation is in ftlist.h */
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FT_EXPORT_DEF( FT_ListNode )
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FT_List_Find( FT_List list,
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void* data )
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{
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FT_ListNode cur;
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cur = list->head;
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while ( cur )
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{
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if ( cur->data == data )
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return cur;
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cur = cur->next;
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}
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return (FT_ListNode)0;
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}
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/* documentation is in ftlist.h */
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FT_EXPORT_DEF( void )
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FT_List_Add( FT_List list,
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FT_ListNode node )
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{
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FT_ListNode before = list->tail;
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node->next = 0;
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node->prev = before;
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if ( before )
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before->next = node;
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else
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list->head = node;
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list->tail = node;
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}
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/* documentation is in ftlist.h */
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FT_EXPORT_DEF( void )
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FT_List_Insert( FT_List list,
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FT_ListNode node )
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{
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FT_ListNode after = list->head;
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node->next = after;
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node->prev = 0;
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if ( !after )
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list->tail = node;
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else
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after->prev = node;
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list->head = node;
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}
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/* documentation is in ftlist.h */
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FT_EXPORT_DEF( void )
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FT_List_Remove( FT_List list,
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FT_ListNode node )
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{
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FT_ListNode before, after;
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before = node->prev;
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after = node->next;
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if ( before )
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before->next = after;
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else
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list->head = after;
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if ( after )
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after->prev = before;
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else
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list->tail = before;
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}
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/* documentation is in ftlist.h */
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FT_EXPORT_DEF( void )
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FT_List_Up( FT_List list,
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FT_ListNode node )
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{
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FT_ListNode before, after;
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before = node->prev;
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after = node->next;
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/* check whether we are already on top of the list */
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if ( !before )
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return;
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before->next = after;
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if ( after )
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after->prev = before;
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else
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list->tail = before;
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node->prev = 0;
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node->next = list->head;
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list->head->prev = node;
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list->head = node;
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}
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/* documentation is in ftlist.h */
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FT_EXPORT_DEF( FT_Error )
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FT_List_Iterate( FT_List list,
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FT_List_Iterator iterator,
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void* user )
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{
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FT_ListNode cur = list->head;
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FT_Error error = FT_Err_Ok;
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while ( cur )
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{
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FT_ListNode next = cur->next;
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error = iterator( cur, user );
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if ( error )
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break;
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cur = next;
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}
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return error;
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}
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/* documentation is in ftlist.h */
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FT_EXPORT_DEF( void )
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FT_List_Finalize( FT_List list,
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FT_List_Destructor destroy,
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FT_Memory memory,
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void* user )
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{
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FT_ListNode cur;
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cur = list->head;
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while ( cur )
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{
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FT_ListNode next = cur->next;
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void* data = cur->data;
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if ( destroy )
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destroy( memory, data, user );
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FREE( cur );
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cur = next;
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}
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list->head = 0;
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list->tail = 0;
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}
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** *****/
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/***** G L Y P H L O A D E R *****/
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/***** *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* The glyph loader is a simple object which is used to load a set of */
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/* glyphs easily. It is critical for the correct loading of composites. */
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/* */
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/* Ideally, one can see it as a stack of abstract `glyph' objects. */
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/* */
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/* loader.base Is really the bottom of the stack. It describes a */
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/* single glyph image made of the juxtaposition of */
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/* several glyphs (those `in the stack'). */
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/* */
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/* loader.current Describes the top of the stack, on which a new */
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/* glyph can be loaded. */
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/* */
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/* Rewind Clears the stack. */
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/* Prepare Set up `loader.current' for addition of a new glyph */
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/* image. */
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/* Add Add the `current' glyph image to the `base' one, */
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/* and prepare for another one. */
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/* */
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/* The glyph loader is now a base object. Each driver used to */
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/* re-implement it in one way or the other, which wasted code and */
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/* energy. */
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/* */
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/*************************************************************************/
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/* create a new glyph loader */
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FT_BASE_DEF( FT_Error )
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FT_GlyphLoader _New( FT_Memory memory,
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FT_GlyphLoader *aloader )
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{
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FT_GlyphLoader loader;
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FT_Error error;
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if ( !ALLOC( loader, sizeof ( *loader ) ) )
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{
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loader->memory = memory;
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*aloader = loader;
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}
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return error;
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}
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/* rewind the glyph loader - reset counters to 0 */
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FT_BASE_DEF( void )
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FT_GlyphLoader _Rewind( FT_GlyphLoader loader )
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{
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FT_GlyphLoad* base = &loader->base;
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FT_GlyphLoad* current = &loader->current;
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base->outline.n_points = 0;
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base->outline.n_contours = 0;
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base->num_subglyphs = 0;
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*current = *base;
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}
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/* reset the glyph loader, frees all allocated tables */
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/* and starts from zero */
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FT_BASE_DEF( void )
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FT_GlyphLoader _Reset( FT_GlyphLoader loader )
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{
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FT_Memory memory = loader->memory;
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FREE( loader->base.outline.points );
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FREE( loader->base.outline.tags );
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FREE( loader->base.outline.contours );
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FREE( loader->base.extra_points );
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FREE( loader->base.subglyphs );
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loader->max_points = 0;
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loader->max_contours = 0;
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loader->max_subglyphs = 0;
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FT_GlyphLoader _Rewind( loader );
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}
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/* delete a glyph loader */
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FT_BASE_DEF( void )
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FT_GlyphLoader _Done( FT_GlyphLoader loader )
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{
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if ( loader )
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{
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FT_Memory memory = loader->memory;
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FT_GlyphLoader _Reset( loader );
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FREE( loader );
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}
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}
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/* re-adjust the `current' outline fields */
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static void
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FT_GlyphLoader _Adjust_Points( FT_GlyphLoader loader )
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{
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FT_Outline* base = &loader->base.outline;
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FT_Outline* current = &loader->current.outline;
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current->points = base->points + base->n_points;
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current->tags = base->tags + base->n_points;
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current->contours = base->contours + base->n_contours;
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/* handle extra points table - if any */
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if ( loader->use_extra )
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loader->current.extra_points =
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loader->base.extra_points + base->n_points;
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}
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FT_BASE_DEF( FT_Error )
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FT_GlyphLoader _Create_Extra( FT_GlyphLoader loader )
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{
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FT_Error error;
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FT_Memory memory = loader->memory;
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if ( !ALLOC_ARRAY( loader->base.extra_points,
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loader->max_points, FT_Vector ) )
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{
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loader->use_extra = 1;
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FT_GlyphLoader _Adjust_Points( loader );
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}
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return error;
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}
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/* re-adjust the `current' subglyphs field */
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static void
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FT_GlyphLoader _Adjust_Subglyphs( FT_GlyphLoader loader )
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{
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FT_GlyphLoad* base = &loader->base;
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FT_GlyphLoad* current = &loader->current;
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current->subglyphs = base->subglyphs + base->num_subglyphs;
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}
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/* Ensure that we can add `n_points' and `n_contours' to our glyph. this */
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/* function reallocates its outline tables if necessary. Note that it */
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/* DOESN'T change the number of points within the loader! */
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/* */
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FT_BASE_DEF( FT_Error )
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FT_GlyphLoader _Check_Points( FT_GlyphLoader loader,
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FT_UInt n_points,
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FT_UInt n_contours )
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{
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FT_Memory memory = loader->memory;
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FT_Error error = FT_Err_Ok;
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FT_Outline* base = &loader->base.outline;
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FT_Outline* current = &loader->current.outline;
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FT_Bool adjust = 1;
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FT_UInt new_max, old_max;
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/* check points & tags */
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new_max = base->n_points + current->n_points + n_points;
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old_max = loader->max_points;
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if ( new_max > old_max )
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{
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new_max = ( new_max + 7 ) & -8;
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if ( REALLOC_ARRAY( base->points, old_max, new_max, FT_Vector ) ||
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REALLOC_ARRAY( base->tags, old_max, new_max, FT_Byte ) )
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goto Exit;
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if ( loader->use_extra &&
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REALLOC_ARRAY( loader->base.extra_points, old_max,
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new_max, FT_Vector ) )
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goto Exit;
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adjust = 1;
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loader->max_points = new_max;
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}
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/* check contours */
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old_max = loader->max_contours;
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new_max = base->n_contours + current->n_contours +
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n_contours;
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if ( new_max > old_max )
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{
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new_max = ( new_max + 3 ) & -4;
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if ( REALLOC_ARRAY( base->contours, old_max, new_max, FT_Short ) )
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goto Exit;
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adjust = 1;
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loader->max_contours = new_max;
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}
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|
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if ( adjust )
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FT_GlyphLoader _Adjust_Points( loader );
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Exit:
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return error;
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}
|
||||
|
||||
|
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/* Ensure that we can add `n_subglyphs' to our glyph. this function */
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/* reallocates its subglyphs table if necessary. Note that it DOES */
|
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/* NOT change the number of subglyphs within the loader! */
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/* */
|
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FT_BASE_DEF( FT_Error )
|
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FT_GlyphLoader _Check_Subglyphs( FT_GlyphLoader loader,
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FT_UInt n_subs )
|
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{
|
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FT_Memory memory = loader->memory;
|
||||
FT_Error error = FT_Err_Ok;
|
||||
FT_UInt new_max, old_max;
|
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|
||||
FT_GlyphLoad* base = &loader->base;
|
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FT_GlyphLoad* current = &loader->current;
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||||
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new_max = base->num_subglyphs + current->num_subglyphs + n_subs;
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old_max = loader->max_subglyphs;
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if ( new_max > old_max )
|
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{
|
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new_max = ( new_max + 1 ) & -2;
|
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if ( REALLOC_ARRAY( base->subglyphs, old_max, new_max, FT_SubGlyph ) )
|
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goto Exit;
|
||||
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loader->max_subglyphs = new_max;
|
||||
|
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FT_GlyphLoader _Adjust_Subglyphs( loader );
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}
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||||
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Exit:
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return error;
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||||
}
|
||||
|
||||
|
||||
/* prepare loader for the addition of a new glyph on top of the base one */
|
||||
FT_BASE_DEF( void )
|
||||
FT_GlyphLoader _Prepare( FT_GlyphLoader loader )
|
||||
{
|
||||
FT_GlyphLoad* current = &loader->current;
|
||||
|
||||
|
||||
current->outline.n_points = 0;
|
||||
current->outline.n_contours = 0;
|
||||
current->num_subglyphs = 0;
|
||||
|
||||
FT_GlyphLoader _Adjust_Points ( loader );
|
||||
FT_GlyphLoader _Adjust_Subglyphs( loader );
|
||||
}
|
||||
|
||||
|
||||
/* add current glyph to the base image - and prepare for another */
|
||||
FT_BASE_DEF( void )
|
||||
FT_GlyphLoader _Add( FT_GlyphLoader loader )
|
||||
{
|
||||
FT_GlyphLoad* base = &loader->base;
|
||||
FT_GlyphLoad* current = &loader->current;
|
||||
|
||||
FT_UInt n_curr_contours = current->outline.n_contours;
|
||||
FT_UInt n_base_points = base->outline.n_points;
|
||||
FT_UInt n;
|
||||
|
||||
|
||||
base->outline.n_points =
|
||||
(short)( base->outline.n_points + current->outline.n_points );
|
||||
base->outline.n_contours =
|
||||
(short)( base->outline.n_contours + current->outline.n_contours );
|
||||
|
||||
base->num_subglyphs += current->num_subglyphs;
|
||||
|
||||
/* adjust contours count in newest outline */
|
||||
for ( n = 0; n < n_curr_contours; n++ )
|
||||
current->outline.contours[n] =
|
||||
(short)( current->outline.contours[n] + n_base_points );
|
||||
|
||||
/* prepare for another new glyph image */
|
||||
FT_GlyphLoader _Prepare( loader );
|
||||
}
|
||||
|
||||
|
||||
FT_BASE_DEF( FT_Error )
|
||||
FT_GlyphLoader _Copy_Points( FT_GlyphLoader target,
|
||||
FT_GlyphLoader source )
|
||||
{
|
||||
FT_Error error;
|
||||
FT_UInt num_points = source->base.outline.n_points;
|
||||
FT_UInt num_contours = source->base.outline.n_contours;
|
||||
|
||||
|
||||
error = FT_GlyphLoader _Check_Points( target, num_points, num_contours );
|
||||
if ( !error )
|
||||
{
|
||||
FT_Outline* out = &target->base.outline;
|
||||
FT_Outline* in = &source->base.outline;
|
||||
|
||||
|
||||
MEM_Copy( out->points, in->points,
|
||||
num_points * sizeof ( FT_Vector ) );
|
||||
MEM_Copy( out->tags, in->tags,
|
||||
num_points * sizeof ( char ) );
|
||||
MEM_Copy( out->contours, in->contours,
|
||||
num_contours * sizeof ( short ) );
|
||||
|
||||
/* do we need to copy the extra points? */
|
||||
if ( target->use_extra && source->use_extra )
|
||||
MEM_Copy( target->base.extra_points, source->base.extra_points,
|
||||
num_points * sizeof ( FT_Vector ) );
|
||||
|
||||
out->n_points = (short)num_points;
|
||||
out->n_contours = (short)num_contours;
|
||||
|
||||
FT_GlyphLoader _Adjust_Points( target );
|
||||
}
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
|
||||
/*************************************************************************/
|
||||
/*************************************************************************/
|
||||
/*************************************************************************/
|
||||
/***** *****/
|
||||
/***** *****/
|
||||
/***** S T R E A M S *****/
|
||||
/***** *****/
|
||||
/***** *****/
|
||||
/*************************************************************************/
|
||||
/*************************************************************************/
|
||||
/*************************************************************************/
|
||||
|
||||
#undef FT_COMPONENT
|
||||
#define FT_COMPONENT trace_stream
|
||||
|
||||
/*************************************************************************/
|
||||
/* */
|
||||
/* <Function> */
|
||||
/* ft_new_input_stream */
|
||||
/* */
|
||||
/* <Description> */
|
||||
/* Creates a new input stream object from an FT_Open_Args structure. */
|
||||
/* */
|
||||
/* <Note> */
|
||||
/* The function expects a valid `astream' parameter. */
|
||||
/* */
|
||||
FT_EXPORT_DEF( FT_Error )
|
||||
FT_Stream_Open( FT_Library library,
|
||||
FT_Open_Args* args,
|
||||
FT_Stream* astream )
|
||||
{
|
||||
FT_Error error;
|
||||
FT_Memory memory;
|
||||
FT_Stream stream;
|
||||
|
||||
|
||||
if ( !library )
|
||||
return FT_Err_Invalid_Library_Handle;
|
||||
|
||||
if ( !args )
|
||||
return FT_Err_Invalid_Argument;
|
||||
|
||||
*astream = 0;
|
||||
memory = library->memory;
|
||||
if ( ALLOC( stream, sizeof ( *stream ) ) )
|
||||
goto Exit;
|
||||
|
||||
stream->memory = memory;
|
||||
|
||||
/* now, look at the stream flags */
|
||||
if ( args->flags & ft_open_memory )
|
||||
{
|
||||
error = 0;
|
||||
FT_New_Memory_Stream( library,
|
||||
(FT_Byte*)args->memory_base,
|
||||
args->memory_size,
|
||||
stream );
|
||||
}
|
||||
else if ( args->flags & ft_open_pathname )
|
||||
{
|
||||
error = FT_Stream_New( args->pathname, stream );
|
||||
stream->pathname.pointer = args->pathname;
|
||||
}
|
||||
else if ( ( args->flags & ft_open_stream ) && args->stream )
|
||||
{
|
||||
/* in this case, we do not need to allocate a new stream object */
|
||||
/* since the caller is responsible for closing it himself */
|
||||
FREE( stream );
|
||||
stream = args->stream;
|
||||
}
|
||||
else
|
||||
error = FT_Err_Invalid_Argument;
|
||||
|
||||
if ( error )
|
||||
FREE( stream );
|
||||
|
||||
*astream = stream;
|
||||
|
||||
Exit:
|
||||
return error;
|
||||
}
|
||||
|
||||
|
||||
/* documentation is in ftobjs.h */
|
||||
|
||||
FT_EXPORT_DEF( void )
|
||||
FT_Stream_Done( FT_Stream stream )
|
||||
{
|
||||
if ( stream && stream->close )
|
||||
{
|
||||
stream->close( stream );
|
||||
stream->close = 0;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
ft_done_stream( FT_Stream* astream,
|
||||
FT_Int external )
|
||||
{
|
||||
FT_Stream stream = *astream;
|
||||
|
||||
|
||||
if ( stream->close )
|
||||
stream->close( stream );
|
||||
|
||||
if ( !external )
|
||||
{
|
||||
FT_Memory memory = stream->memory;
|
||||
|
||||
|
||||
FREE( stream );
|
||||
}
|
||||
*astream = 0;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue