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Diffstat (limited to 'Source/DirectFB/systems/x11/surfacemanager.h')
-rwxr-xr-x | Source/DirectFB/systems/x11/surfacemanager.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/Source/DirectFB/systems/x11/surfacemanager.h b/Source/DirectFB/systems/x11/surfacemanager.h new file mode 100755 index 0000000..e6136c5 --- /dev/null +++ b/Source/DirectFB/systems/x11/surfacemanager.h @@ -0,0 +1,110 @@ +/* + (c) Copyright 2001-2009 The world wide DirectFB Open Source Community (directfb.org) + (c) Copyright 2000-2004 Convergence (integrated media) GmbH + + All rights reserved. + + Written by Denis Oliver Kropp <dok@directfb.org>, + Andreas Hundt <andi@fischlustig.de>, + Sven Neumann <neo@directfb.org>, + Ville Syrjälä <syrjala@sci.fi> and + Claudio Ciccani <klan@users.sf.net>. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the + Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. +*/ + +#ifndef __SURFACEMANAGER_H__ +#define __SURFACEMANAGER_H__ + +#include <directfb.h> + +#include <core/coretypes.h> + +typedef struct _SurfaceManager SurfaceManager; +typedef struct _Chunk Chunk; + +/* + * initially there is one big free chunk, + * chunks are splitted into a free and an occupied chunk if memory is allocated, + * two chunks are merged to one free chunk if memory is deallocated + */ +struct _Chunk { + int magic; + + int offset; /* offset in memory, + is greater or equal to the heap offset */ + int length; /* length of this chunk in bytes */ + + int pitch; + + CoreSurfaceBuffer *buffer; /* pointer to surface buffer occupying + this chunk, or NULL if chunk is free */ + CoreSurfaceAllocation *allocation; + + int tolerations; /* number of times this chunk was scanned + occupied, resetted in assure_video */ + + Chunk *prev; + Chunk *next; +}; + +struct _SurfaceManager { + int magic; + + FusionSHMPoolShared *shmpool; + + Chunk *chunks; + + int offset; + int length; /* length of the heap in bytes */ + int avail; /* amount of available memory in bytes */ + + int min_toleration; + + bool suspended; +}; + + +DFBResult dfb_surfacemanager_create ( CoreDFB *core, + unsigned int length, + SurfaceManager **ret_manager ); + +void dfb_surfacemanager_destroy( SurfaceManager *manager ); + +/* + * finds and allocates one for the surface or fails, + * after success the video health is CSH_RESTORE. + * NOTE: this does not notify the listeners + */ +DFBResult dfb_surfacemanager_allocate( CoreDFB *core, + SurfaceManager *manager, + CoreSurfaceBuffer *buffer, + CoreSurfaceAllocation *allocation, + Chunk **ret_chunk ); + +DFBResult dfb_surfacemanager_displace( CoreDFB *core, + SurfaceManager *manager, + CoreSurfaceBuffer *buffer ); + +/* + * sets the video health to CSH_INVALID frees the chunk and + * notifies the listeners + */ +DFBResult dfb_surfacemanager_deallocate( SurfaceManager *manager, + Chunk *chunk ); + +#endif + |