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/*
(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.
*/
#include <config.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "x11.h"
#include "x11image.h"
/**********************************************************************************************************************/
DFBResult x11ImageInit( DFBX11 *x11,
x11Image *image,
int width,
int height,
DFBSurfacePixelFormat format )
{
int ret;
Visual *visual;
DFBX11Shared *shared = x11->shared;
if (!x11->use_shm)
return DFB_UNSUPPORTED;
/* Lookup visual. */
visual = x11->visuals[DFB_PIXELFORMAT_INDEX(format)];
if (!visual)
return DFB_UNSUPPORTED;
/* For probing. */
if (!image)
return DFB_OK;
image->width = width;
image->height = height;
image->format = format;
image->depth = DFB_COLOR_BITS_PER_PIXEL( format );
D_MAGIC_SET( image, x11Image );
if (fusion_call_execute( &shared->call, FCEF_NONE, X11_IMAGE_INIT, image, &ret )) {
D_MAGIC_CLEAR( image );
return DFB_FUSION;
}
if (ret) {
D_DERROR( ret, "X11/Image: X11_IMAGE_INIT call failed!\n" );
D_MAGIC_CLEAR( image );
return ret;
}
return DFB_OK;
}
DFBResult
x11ImageDestroy( DFBX11 *x11,
x11Image *image )
{
int ret;
DFBX11Shared *shared = x11->shared;
D_MAGIC_ASSERT( image, x11Image );
if (fusion_call_execute( &shared->call, FCEF_NONE, X11_IMAGE_DESTROY, image, &ret ))
return DFB_FUSION;
if (ret) {
D_DERROR( ret, "X11/Image: X11_IMAGE_DESTROY call failed!\n" );
return ret;
}
D_MAGIC_CLEAR( image );
return DFB_OK;
}
DFBResult
x11ImageAttach( x11Image *image,
void **ret_addr )
{
void *addr;
D_MAGIC_ASSERT( image, x11Image );
D_ASSERT( ret_addr != NULL );
/* FIXME: We also need to DETACH! */
addr = shmat( image->seginfo.shmid, NULL, 0 );
if (!addr) {
int erno = errno;
D_PERROR( "X11/Image: shmat( %d ) failed!\n", image->seginfo.shmid );
return errno2result( erno );
}
*ret_addr = addr;
return DFB_OK;
}
/**********************************************************************************************************************/
DFBResult
dfb_x11_image_init_handler( DFBX11 *x11, x11Image *image )
{
Visual *visual;
XImage *ximage;
D_MAGIC_ASSERT( image, x11Image );
if (!x11->use_shm)
return DFB_UNSUPPORTED;
/* Lookup visual. */
visual = x11->visuals[DFB_PIXELFORMAT_INDEX(image->format)];
if (!visual)
return DFB_UNSUPPORTED;
image->visual = visual;
XLockDisplay( x11->display );
ximage = XShmCreateImage( x11->display, image->visual, image->depth,
ZPixmap, NULL, &image->seginfo, image->width, image->height );
if (!ximage) {
D_ERROR( "X11/ShmImage: Error creating shared image (XShmCreateImage)!\n");
XUnlockDisplay( x11->display );
return DFB_FAILURE;
}
/* we firstly create our shared memory segment with the size we need, and
correct permissions for the owner, the group and the world --> 0777 */
image->seginfo.shmid = shmget( IPC_PRIVATE,
ximage->bytes_per_line * ximage->height,
IPC_CREAT | 0777 );
if (image->seginfo.shmid < 0)
goto error;
/* Then, we have to attach the segment to our process, and we let the
function search the correct memory place --> NULL. It's safest ! */
image->seginfo.shmaddr = shmat( image->seginfo.shmid, NULL, 0 );
if (!image->seginfo.shmaddr)
goto error_shmat;
ximage->data = image->seginfo.shmaddr;
/* We set the buffer in Read and Write mode */
image->seginfo.readOnly = False;
if (!XShmAttach( x11->display, &image->seginfo ))
goto error_xshmattach;
image->ximage = ximage;
image->pitch = ximage->bytes_per_line;
image->pixmap = XShmCreatePixmap( x11->display, DefaultRootWindow(x11->display), ximage->data,
&image->seginfo, image->width, image->height, image->depth );
image->gc = XCreateGC( x11->display, image->pixmap, 0, NULL );
XUnlockDisplay( x11->display );
return DFB_OK;
error_xshmattach:
shmdt( image->seginfo.shmaddr );
error_shmat:
shmctl( image->seginfo.shmid, IPC_RMID, NULL );
error:
XDestroyImage( ximage );
XUnlockDisplay( x11->display );
return DFB_FAILURE;
}
DFBResult
dfb_x11_image_destroy_handler( DFBX11 *x11, x11Image *image )
{
D_MAGIC_ASSERT( image, x11Image );
XLockDisplay( x11->display );
XFreeGC( x11->display, image->gc );
XFreePixmap( x11->display, image->pixmap );
XShmDetach( x11->display, &image->seginfo );
XDestroyImage( image->ximage );
XUnlockDisplay( x11->display );
shmdt( image->seginfo.shmaddr );
shmctl( image->seginfo.shmid, IPC_RMID, NULL );
return DFB_OK;
}
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