XF86DGA.c
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上传日期:2007-02-02
资源大小:6116k
文件大小:16k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /* $XFree86: xc/lib/Xxf86dga/XF86DGA.c,v 3.19 2001/08/18 02:41:30 dawes Exp $ */
- /*
- Copyright (c) 1995 Jon Tombs
- Copyright (c) 1995,1996 The XFree86 Project, Inc
- */
- /* THIS IS NOT AN X CONSORTIUM STANDARD */
- #ifdef __EMX__ /* needed here to override certain constants in X headers */
- #define INCL_DOS
- #define INCL_DOSIOCTL
- #include <os2.h>
- #endif
- #if defined(linux)
- #define HAS_MMAP_ANON
- #include <sys/types.h>
- #include <sys/mman.h>
- #include <asm/page.h> /* PAGE_SIZE */
- #define HAS_SC_PAGESIZE /* _SC_PAGESIZE may be an enum for Linux */
- #define HAS_GETPAGESIZE
- #endif /* linux */
- #if defined(CSRG_BASED)
- #define HAS_MMAP_ANON
- #define HAS_GETPAGESIZE
- #include <sys/types.h>
- #include <sys/mman.h>
- #endif /* CSRG_BASED */
- #if defined(DGUX)
- #define HAS_GETPAGESIZE
- #define MMAP_DEV_ZERO
- #include <sys/types.h>
- #include <sys/mman.h>
- #include <unistd.h>
- #endif /* DGUX */
- #if defined(SVR4) && !defined(DGUX)
- #define MMAP_DEV_ZERO
- #include <sys/types.h>
- #include <sys/mman.h>
- #include <unistd.h>
- #endif /* SVR4 && !DGUX */
- #if defined(sun) && !defined(SVR4) /* SunOS */
- #define MMAP_DEV_ZERO /* doesn't SunOS have MAP_ANON ?? */
- #define HAS_GETPAGESIZE
- #include <sys/types.h>
- #include <sys/mman.h>
- #endif /* sun && !SVR4 */
- #ifdef XNO_SYSCONF
- #undef _SC_PAGESIZE
- #endif
- #define NEED_EVENTS
- #define NEED_REPLIES
- #include <X11/Xlibint.h>
- #include "xf86dga.h"
- #include "xf86dgastr.h"
- #include <X11/extensions/Xext.h>
- #include "extutil.h"
- extern XExtDisplayInfo* SDL_NAME(xdga_find_display)(Display*);
- extern char *SDL_NAME(xdga_extension_name);
- #define XF86DGACheckExtension(dpy,i,val)
- XextCheckExtension (dpy, i, SDL_NAME(xdga_extension_name), val)
- /*****************************************************************************
- * *
- * public XFree86-DGA Extension routines *
- * *
- *****************************************************************************/
- Bool SDL_NAME(XF86DGAQueryExtension) (
- Display *dpy,
- int *event_basep,
- int *error_basep
- ){
- return SDL_NAME(XDGAQueryExtension)(dpy, event_basep, error_basep);
- }
- Bool SDL_NAME(XF86DGAQueryVersion)(
- Display* dpy,
- int* majorVersion,
- int* minorVersion
- ){
- return SDL_NAME(XDGAQueryVersion)(dpy, majorVersion, minorVersion);
- }
- Bool SDL_NAME(XF86DGAGetVideoLL)(
- Display* dpy,
- int screen,
- int *offset,
- int *width,
- int *bank_size,
- int *ram_size
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXF86DGAGetVideoLLReply rep;
- xXF86DGAGetVideoLLReq *req;
- XF86DGACheckExtension (dpy, info, False);
- LockDisplay(dpy);
- GetReq(XF86DGAGetVideoLL, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XF86DGAGetVideoLL;
- req->screen = screen;
- if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
- UnlockDisplay(dpy);
- SyncHandle();
- return False;
- }
- *offset = /*(char *)*/rep.offset;
- *width = rep.width;
- *bank_size = rep.bank_size;
- *ram_size = rep.ram_size;
- UnlockDisplay(dpy);
- SyncHandle();
- return True;
- }
- Bool SDL_NAME(XF86DGADirectVideoLL)(
- Display* dpy,
- int screen,
- int enable
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXF86DGADirectVideoReq *req;
- XF86DGACheckExtension (dpy, info, False);
- LockDisplay(dpy);
- GetReq(XF86DGADirectVideo, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XF86DGADirectVideo;
- req->screen = screen;
- req->enable = enable;
- UnlockDisplay(dpy);
- SyncHandle();
- XSync(dpy,False);
- return True;
- }
- Bool SDL_NAME(XF86DGAGetViewPortSize)(
- Display* dpy,
- int screen,
- int *width,
- int *height
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXF86DGAGetViewPortSizeReply rep;
- xXF86DGAGetViewPortSizeReq *req;
- XF86DGACheckExtension (dpy, info, False);
- LockDisplay(dpy);
- GetReq(XF86DGAGetViewPortSize, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XF86DGAGetViewPortSize;
- req->screen = screen;
- if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
- UnlockDisplay(dpy);
- SyncHandle();
- return False;
- }
- *width = rep.width;
- *height = rep.height;
- UnlockDisplay(dpy);
- SyncHandle();
- return True;
- }
- Bool SDL_NAME(XF86DGASetViewPort)(
- Display* dpy,
- int screen,
- int x,
- int y
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXF86DGASetViewPortReq *req;
- XF86DGACheckExtension (dpy, info, False);
- LockDisplay(dpy);
- GetReq(XF86DGASetViewPort, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XF86DGASetViewPort;
- req->screen = screen;
- req->x = x;
- req->y = y;
- UnlockDisplay(dpy);
- SyncHandle();
- XSync(dpy,False);
- return True;
- }
- Bool SDL_NAME(XF86DGAGetVidPage)(
- Display* dpy,
- int screen,
- int *vpage
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXF86DGAGetVidPageReply rep;
- xXF86DGAGetVidPageReq *req;
- XF86DGACheckExtension (dpy, info, False);
- LockDisplay(dpy);
- GetReq(XF86DGAGetVidPage, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XF86DGAGetVidPage;
- req->screen = screen;
- if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
- UnlockDisplay(dpy);
- SyncHandle();
- return False;
- }
- *vpage = rep.vpage;
- UnlockDisplay(dpy);
- SyncHandle();
- return True;
- }
- Bool SDL_NAME(XF86DGASetVidPage)(
- Display* dpy,
- int screen,
- int vpage
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXF86DGASetVidPageReq *req;
- XF86DGACheckExtension (dpy, info, False);
- LockDisplay(dpy);
- GetReq(XF86DGASetVidPage, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XF86DGASetVidPage;
- req->screen = screen;
- req->vpage = vpage;
- UnlockDisplay(dpy);
- SyncHandle();
- XSync(dpy,False);
- return True;
- }
- Bool SDL_NAME(XF86DGAInstallColormap)(
- Display* dpy,
- int screen,
- Colormap cmap
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXF86DGAInstallColormapReq *req;
- XF86DGACheckExtension (dpy, info, False);
- LockDisplay(dpy);
- GetReq(XF86DGAInstallColormap, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XF86DGAInstallColormap;
- req->screen = screen;
- req->id = cmap;
- UnlockDisplay(dpy);
- SyncHandle();
- XSync(dpy,False);
- return True;
- }
- Bool SDL_NAME(XF86DGAQueryDirectVideo)(
- Display *dpy,
- int screen,
- int *flags
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXF86DGAQueryDirectVideoReply rep;
- xXF86DGAQueryDirectVideoReq *req;
- XF86DGACheckExtension (dpy, info, False);
- LockDisplay(dpy);
- GetReq(XF86DGAQueryDirectVideo, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XF86DGAQueryDirectVideo;
- req->screen = screen;
- if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
- UnlockDisplay(dpy);
- SyncHandle();
- return False;
- }
- *flags = rep.flags;
- UnlockDisplay(dpy);
- SyncHandle();
- return True;
- }
- Bool SDL_NAME(XF86DGAViewPortChanged)(
- Display *dpy,
- int screen,
- int n
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXF86DGAViewPortChangedReply rep;
- xXF86DGAViewPortChangedReq *req;
- XF86DGACheckExtension (dpy, info, False);
- LockDisplay(dpy);
- GetReq(XF86DGAViewPortChanged, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XF86DGAViewPortChanged;
- req->screen = screen;
- req->n = n;
- if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
- UnlockDisplay(dpy);
- SyncHandle();
- return False;
- }
- UnlockDisplay(dpy);
- SyncHandle();
- return rep.result;
- }
- /* Helper functions */
- #include <X11/Xmd.h>
- #include <XFree86/extensions/xf86dga.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <fcntl.h>
- #if defined(ISC)
- # define HAS_SVR3_MMAP
- # include <sys/types.h>
- # include <errno.h>
- # include <sys/at_ansi.h>
- # include <sys/kd.h>
- # include <sys/sysmacros.h>
- # include <sys/immu.h>
- # include <sys/region.h>
- # include <sys/mmap.h>
- #else
- # if !defined(Lynx)
- # if !defined(__EMX__)
- # include <sys/mman.h>
- # endif
- # else
- # include <sys/types.h>
- # include <errno.h>
- # include <smem.h>
- # endif
- #endif
- #include <sys/wait.h>
- #include <signal.h>
- #include <unistd.h>
- #if defined(SVR4) && !defined(sun) && !defined(SCO325)
- #define DEV_MEM "/dev/pmem"
- #elif defined(SVR4) && defined(sun)
- #define DEV_MEM "/dev/xsvc"
- #else
- #define DEV_MEM "/dev/mem"
- #endif
- typedef struct {
- unsigned long physaddr; /* actual requested physical address */
- unsigned long size; /* actual requested map size */
- unsigned long delta; /* delta to account for page alignment */
- void * vaddr; /* mapped address, without the delta */
- int refcount; /* reference count */
- } MapRec, *MapPtr;
- typedef struct {
- Display * display;
- int screen;
- MapPtr map;
- } ScrRec, *ScrPtr;
- static int mapFd = -1;
- static int numMaps = 0;
- static int numScrs = 0;
- static MapPtr *mapList = NULL;
- static ScrPtr *scrList = NULL;
- static MapPtr
- AddMap(void)
- {
- MapPtr *old;
- old = mapList;
- mapList = realloc(mapList, sizeof(MapPtr) * (numMaps + 1));
- if (!mapList) {
- mapList = old;
- return NULL;
- }
- mapList[numMaps] = malloc(sizeof(MapRec));
- if (!mapList[numMaps])
- return NULL;
- return mapList[numMaps++];
- }
- static ScrPtr
- AddScr(void)
- {
- ScrPtr *old;
- old = scrList;
- scrList = realloc(scrList, sizeof(ScrPtr) * (numScrs + 1));
- if (!scrList) {
- scrList = old;
- return NULL;
- }
- scrList[numScrs] = malloc(sizeof(ScrRec));
- if (!scrList[numScrs])
- return NULL;
- return scrList[numScrs++];
- }
- static MapPtr
- FindMap(unsigned long address, unsigned long size)
- {
- int i;
- for (i = 0; i < numMaps; i++) {
- if (mapList[i]->physaddr == address &&
- mapList[i]->size == size)
- return mapList[i];
- }
- return NULL;
- }
- static ScrPtr
- FindScr(Display *display, int screen)
- {
- int i;
- for (i = 0; i < numScrs; i++) {
- if (scrList[i]->display == display &&
- scrList[i]->screen == screen)
- return scrList[i];
- }
- return NULL;
- }
- static void *
- MapPhysAddress(unsigned long address, unsigned long size)
- {
- unsigned long offset, delta;
- int pagesize = -1;
- void *vaddr;
- MapPtr mp;
- #if defined(ISC) && defined(HAS_SVR3_MMAP)
- struct kd_memloc mloc;
- #elif defined(__EMX__)
- APIRET rc;
- ULONG action;
- HFILE hfd;
- #endif
- if ((mp = FindMap(address, size))) {
- mp->refcount++;
- return (void *)((unsigned long)mp->vaddr + mp->delta);
- }
- #if defined(_SC_PAGESIZE) && defined(HAS_SC_PAGESIZE)
- pagesize = sysconf(_SC_PAGESIZE);
- #endif
- #ifdef _SC_PAGE_SIZE
- if (pagesize == -1)
- pagesize = sysconf(_SC_PAGE_SIZE);
- #endif
- #ifdef HAS_GETPAGESIZE
- if (pagesize == -1)
- pagesize = getpagesize();
- #endif
- #ifdef PAGE_SIZE
- if (pagesize == -1)
- pagesize = PAGE_SIZE;
- #endif
- if (pagesize == -1)
- pagesize = 4096;
- delta = address % pagesize;
- offset = address - delta;
- #if defined(ISC) && defined(HAS_SVR3_MMAP)
- if (mapFd < 0) {
- if ((mapFd = open("/dev/mmap", O_RDWR)) < 0)
- return NULL;
- }
- mloc.vaddr = (char *)0;
- mloc.physaddr = (char *)offset;
- mloc.length = size + delta;
- mloc.ioflg=1;
- if ((vaddr = (void *)ioctl(mapFd, MAP, &mloc)) == (void *)-1)
- return NULL;
- #elif defined (__EMX__)
- /*
- * Dragon warning here! /dev/pmap$ is never closed, except on progam exit.
- * Consecutive calling of this routine will make PMAP$ driver run out
- * of memory handles. Some umap/close mechanism should be provided
- */
- rc = DosOpen("/dev/pmap$", &hfd, &action, 0, FILE_NORMAL, FILE_OPEN,
- OPEN_ACCESS_READWRITE | OPEN_SHARE_DENYNONE, (PEAOP2)NULL);
- if (rc != 0)
- return NULL;
- {
- struct map_ioctl {
- union {
- ULONG phys;
- void* user;
- } a;
- ULONG size;
- } pmap,dmap;
- ULONG plen,dlen;
- #define XFREE86_PMAP 0x76
- #define PMAP_MAP 0x44
- pmap.a.phys = offset;
- pmap.size = size + delta;
- rc = DosDevIOCtl(hfd, XFREE86_PMAP, PMAP_MAP,
- (PULONG)&pmap, sizeof(pmap), &plen,
- (PULONG)&dmap, sizeof(dmap), &dlen);
- if (rc == 0) {
- vaddr = dmap.a.user;
- }
- }
- if (rc != 0)
- return NULL;
- #elif defined (Lynx)
- vaddr = (void *)smem_create("XF86DGA", (char *)offset,
- size + delta, SM_READ|SM_WRITE);
- #else
- #ifndef MAP_FILE
- #define MAP_FILE 0
- #endif
- if (mapFd < 0) {
- if ((mapFd = open(DEV_MEM, O_RDWR)) < 0)
- return NULL;
- }
- vaddr = (void *)mmap(NULL, size + delta, PROT_READ | PROT_WRITE,
- MAP_FILE | MAP_SHARED, mapFd, (off_t)offset);
- if (vaddr == (void *)-1)
- return NULL;
- #endif
- if (!vaddr) {
- if (!(mp = AddMap()))
- return NULL;
- mp->physaddr = address;
- mp->size = size;
- mp->delta = delta;
- mp->vaddr = vaddr;
- mp->refcount = 1;
- }
- return (void *)((unsigned long)vaddr + delta);
- }
- /*
- * Still need to find a clean way of detecting the death of a DGA app
- * and returning things to normal - Jon
- * This is here to help debugging without rebooting... Also C-A-BS
- * should restore text mode.
- */
- int
- SDL_NAME(XF86DGAForkApp)(int screen)
- {
- pid_t pid;
- int status;
- int i;
- /* fork the app, parent hangs around to clean up */
- if ((pid = fork()) > 0) {
- ScrPtr sp;
- waitpid(pid, &status, 0);
- for (i = 0; i < numScrs; i++) {
- sp = scrList[i];
- SDL_NAME(XF86DGADirectVideoLL)(sp->display, sp->screen, 0);
- XSync(sp->display, False);
- }
- if (WIFEXITED(status))
- _exit(0);
- else
- _exit(-1);
- }
- return pid;
- }
- Bool
- SDL_NAME(XF86DGADirectVideo)(
- Display *dis,
- int screen,
- int enable
- ){
- ScrPtr sp;
- MapPtr mp = NULL;
- if ((sp = FindScr(dis, screen)))
- mp = sp->map;
- if (enable & XF86DGADirectGraphics) {
- #if !defined(ISC) && !defined(HAS_SVR3_MMAP) && !defined(Lynx)
- && !defined(__EMX__)
- if (mp && mp->vaddr)
- mprotect(mp->vaddr, mp->size + mp->delta, PROT_READ | PROT_WRITE);
- #endif
- } else {
- #if !defined(ISC) && !defined(HAS_SVR3_MMAP) && !defined(Lynx)
- && !defined(__EMX__)
- if (mp && mp->vaddr)
- mprotect(mp->vaddr, mp->size + mp->delta, PROT_READ);
- #elif defined(Lynx)
- /* XXX this doesn't allow enable after disable */
- smem_create(NULL, mp->vaddr, mp->size + mp->delta, SM_DETACH);
- smem_remove("XF86DGA");
- #endif
- }
- SDL_NAME(XF86DGADirectVideoLL)(dis, screen, enable);
- return 1;
- }
- static void
- XF86cleanup(int sig)
- {
- ScrPtr sp;
- int i;
- static char beenhere = 0;
- if (beenhere)
- _exit(3);
- beenhere = 1;
- for (i = 0; i < numScrs; i++) {
- sp = scrList[i];
- SDL_NAME(XF86DGADirectVideo)(sp->display, sp->screen, 0);
- XSync(sp->display, False);
- }
- _exit(3);
- }
- Bool
- SDL_NAME(XF86DGAGetVideo)(
- Display *dis,
- int screen,
- char **addr,
- int *width,
- int *bank,
- int *ram
- ){
- /*unsigned long*/ int offset;
- static int beenHere = 0;
- ScrPtr sp;
- MapPtr mp;
- if (!(sp = FindScr(dis, screen))) {
- if (!(sp = AddScr())) {
- fprintf(stderr, "XF86DGAGetVideo: malloc failuren");
- exit(-2);
- }
- sp->display = dis;
- sp->screen = screen;
- sp->map = NULL;
- }
- SDL_NAME(XF86DGAGetVideoLL)(dis, screen , &offset, width, bank, ram);
- *addr = MapPhysAddress(offset, *bank);
- if (*addr == NULL) {
- fprintf(stderr, "XF86DGAGetVideo: failed to map video memory (%s)n",
- strerror(errno));
- exit(-2);
- }
- if ((mp = FindMap(offset, *bank)))
- sp->map = mp;
- if (!beenHere) {
- beenHere = 1;
- atexit((void(*)(void))XF86cleanup);
- /* one shot XF86cleanup attempts */
- signal(SIGSEGV, XF86cleanup);
- #ifdef SIGBUS
- signal(SIGBUS, XF86cleanup);
- #endif
- signal(SIGHUP, XF86cleanup);
- signal(SIGFPE, XF86cleanup);
- }
- return 1;
- }