home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Aminet 44
/
Aminet 44 (2001)(GTI - Schatztruhe)[!][Aug 2001].iso
/
Aminet
/
dev
/
misc
/
AmigaSDLsrc.lha
/
amisrc
/
SDL_cgxyuv.c
< prev
next >
Wrap
C/C++ Source or Header
|
2000-08-11
|
5KB
|
192 lines
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997, 1998, 1999, 2000 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
slouken@devolution.com
*/
#ifdef SAVE_RCSID
static char rcsid =
"@(#) $Id: SDL_x11yuv.c,v 1.1.2.1 2000/04/10 02:49:41 hercules Exp $";
#endif
/* This is the XFree86 Xv extension implementation of YUV video overlays */
#ifdef XFREE86_XV
#include <stdlib.h>
#include <string.h>
#include <X11/Xlib.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
#include <X11/extensions/Xvlib.h>
#include "SDL_error.h"
#include "SDL_video.h"
#include "SDL_x11yuv_c.h"
#include "SDL_yuvfuncs.h"
/* The functions used to manipulate software video overlays */
static struct private_yuvhwfuncs x11_yuvfuncs = {
X11_LockYUVOverlay,
X11_UnlockYUVOverlay,
X11_DisplayYUVOverlay,
X11_FreeYUVOverlay
};
struct private_yuvhwdata {
int port;
XShmSegmentInfo yuvshm;
XvImage *image;
};
SDL_Overlay *X11_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
{
SDL_Overlay *overlay;
struct private_yuvhwdata *hwdata;
int xv_port;
int i, j;
int adaptors;
XvAdaptorInfo *ainfo;
XShmSegmentInfo *yuvshm;
xv_port = -1;
if ( (Success == XvQueryExtension(GFX_Display, &j, &j, &j, &j, &j)) &&
(Success == XvQueryAdaptors(GFX_Display,
RootWindow(GFX_Display, SDL_Screen),
&adaptors, &ainfo)) ) {
for ( i=0; (i<adaptors) && (xv_port == -1); ++i ) {
if ( (ainfo[i].type & XvInputMask) &&
(ainfo[i].type & XvImageMask) ) {
int num_formats;
XvImageFormatValues *formats;
formats = XvListImageFormats(GFX_Display,
ainfo[i].base_id, &num_formats);
for ( j=0; j<num_formats; ++j ) {
if ( (Uint32)formats[j].id == format ) {
xv_port = ainfo[i].base_id;
break;
}
}
}
}
}
if ( xv_port == -1 ) {
SDL_SetError("No available video ports for requested format");
return(NULL);
}
/* Create the overlay structure */
overlay = (SDL_Overlay *)malloc(sizeof *overlay);
if ( overlay == NULL ) {
SDL_OutOfMemory();
return(NULL);
}
memset(overlay, 0, (sizeof *overlay));
/* Fill in the basic members */
overlay->format = format;
overlay->w = width;
overlay->h = height;
/* Set up the YUV surface function structure */
overlay->hwfuncs = &x11_yuvfuncs;
/* Create the pixel data and lookup tables */
hwdata = (struct private_yuvhwdata *)malloc(sizeof *hwdata);
overlay->hwdata = hwdata;
if ( hwdata == NULL ) {
SDL_OutOfMemory();
SDL_FreeYUVOverlay(overlay);
return(NULL);
}
yuvshm = &hwdata->yuvshm;
memset(yuvshm, 0, sizeof(*yuvshm));
hwdata->port = xv_port;
hwdata->image = XvShmCreateImage(GFX_Display, xv_port, format,
0, width, height, yuvshm);
if ( hwdata->image == NULL ) {
SDL_OutOfMemory();
SDL_FreeYUVOverlay(overlay);
return(NULL);
}
yuvshm->shmid = shmget(IPC_PRIVATE, hwdata->image->data_size,
IPC_CREAT | 0777);
if ( yuvshm->shmid < 0 ) {
SDL_SetError("Unable to get %d bytes shared memory",
hwdata->image->data_size);
SDL_FreeYUVOverlay(overlay);
return(NULL);
}
yuvshm->shmaddr = (caddr_t) shmat(yuvshm->shmid, 0, 0);
yuvshm->readOnly = False;
hwdata->image->data = yuvshm->shmaddr;
XShmAttach(GFX_Display, yuvshm);
XSync(GFX_Display, False);
shmctl(yuvshm->shmid, IPC_RMID, 0);
/* We're all done.. */
return(overlay);
}
int X11_LockYUVOverlay(_THIS, SDL_Overlay *overlay)
{
overlay->pixels = overlay->hwdata->image->data;
/* What should the pitch be set to? */
return(0);
}
void X11_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)
{
overlay->pixels = NULL;
}
int X11_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *dstrect)
{
struct private_yuvhwdata *hwdata;
hwdata = overlay->hwdata;
XvShmPutImage(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
hwdata->image, 0, 0, overlay->w, overlay->h,
dstrect->x, dstrect->y, dstrect->w, dstrect->h, False);
XSync(GFX_Display, False);
return(0);
}
void X11_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
{
struct private_yuvhwdata *hwdata;
hwdata = overlay->hwdata;
if ( hwdata ) {
if ( hwdata->yuvshm.shmaddr ) {
XShmDetach(GFX_Display, &hwdata->yuvshm);
shmdt(hwdata->yuvshm.shmaddr);
}
if ( hwdata->image ) {
XFree(hwdata->image);
}
free(hwdata);
}
}
#endif /* XFREE86_XV */