XF86DGA2.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:25k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /* $XFree86: xc/lib/Xxf86dga/XF86DGA2.c,v 1.18 2001/08/17 13:27:51 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
- #define NEED_EVENTS
- #define NEED_REPLIES
- #include <X11/Xlibint.h>
- #include "xf86dga.h"
- #include "xf86dgastr.h"
- #include <X11/extensions/Xext.h>
- #include "extutil.h"
- #include <stdio.h>
- #if defined(linux) /* Needed for framebuffer console support */
- #include <sys/ioctl.h>
- #include <linux/fb.h>
- #endif
- /* If you change this, change the Bases[] array below as well */
- #define MAX_HEADS 16
- char *SDL_NAME(xdga_extension_name) = XF86DGANAME;
- static XExtensionInfo _xdga_info_data;
- static XExtensionInfo *xdga_info = &_xdga_info_data;
- Bool SDL_NAME(XDGAMapFramebuffer)(int, char *, unsigned char*, CARD32, CARD32, CARD32);
- void SDL_NAME(XDGAUnmapFramebuffer)(int);
- unsigned char* SDL_NAME(XDGAGetMappedMemory)(int);
- #define XDGACheckExtension(dpy,i,val)
- XextCheckExtension (dpy, i, SDL_NAME(xdga_extension_name), val)
- /*****************************************************************************
- * *
- * private utility routines *
- * *
- *****************************************************************************/
- static int xdga_close_display(Display *dpy, XExtCodes *codes);
- static Bool xdga_wire_to_event(Display *dpy, XEvent *event, xEvent *wire_ev);
- static Status xdga_event_to_wire(Display *dpy, XEvent *event, xEvent *wire_ev);
- static XExtensionHooks xdga_extension_hooks = {
- NULL, /* create_gc */
- NULL, /* copy_gc */
- NULL, /* flush_gc */
- NULL, /* free_gc */
- NULL, /* create_font */
- NULL, /* free_font */
- xdga_close_display, /* close_display */
- xdga_wire_to_event, /* wire_to_event */
- xdga_event_to_wire, /* event_to_wire */
- NULL, /* error */
- NULL, /* error_string */
- };
- static XEXT_GENERATE_CLOSE_DISPLAY (xdga_close_display, xdga_info)
- XEXT_GENERATE_FIND_DISPLAY (SDL_NAME(xdga_find_display), xdga_info,
- "XFree86-DGA",
- &xdga_extension_hooks,
- 0, NULL)
- static Status
- xdga_event_to_wire(
- Display *dpy,
- XEvent *event,
- xEvent *wire_ev
- ){
- return True;
- }
- static Bool
- xdga_wire_to_event(
- Display *dpy,
- XEvent *event,
- xEvent *wire_ev
- ){
- dgaEvent *wire = (dgaEvent *) wire_ev;
- SDL_NAME(XDGAButtonEvent) *bevent;
- SDL_NAME(XDGAKeyEvent) *kevent;
- SDL_NAME(XDGAMotionEvent) *mevent;
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- XDGACheckExtension (dpy, info, False);
- switch((wire->u.u.type & 0x7f) - info->codes->first_event) {
- case MotionNotify:
- mevent = (SDL_NAME(XDGAMotionEvent)*)event;
- mevent->type = wire->u.u.type & 0x7F;
- mevent->serial = _XSetLastRequestRead(dpy, (xGenericReply *)wire);
- mevent->display = dpy;
- mevent->screen = wire->u.event.screen;
- mevent->time = wire->u.event.time;
- mevent->state = wire->u.event.state;
- mevent->dx = wire->u.event.dx;
- mevent->dy = wire->u.event.dy;
- return True;
- case ButtonPress:
- case ButtonRelease:
- bevent = (SDL_NAME(XDGAButtonEvent)*)event;
- bevent->type = wire->u.u.type & 0x7F;
- bevent->serial = _XSetLastRequestRead(dpy, (xGenericReply *)wire);
- bevent->display = dpy;
- bevent->screen = wire->u.event.screen;
- bevent->time = wire->u.event.time;
- bevent->state = wire->u.event.state;
- bevent->button = wire->u.u.detail;
- return True;
- case KeyPress:
- case KeyRelease:
- kevent = (SDL_NAME(XDGAKeyEvent)*)event;
- kevent->type = wire->u.u.type & 0x7F;
- kevent->serial = _XSetLastRequestRead(dpy, (xGenericReply *)wire);
- kevent->display = dpy;
- kevent->screen = wire->u.event.screen;
- kevent->time = wire->u.event.time;
- kevent->state = wire->u.event.state;
- kevent->keycode = wire->u.u.detail;
- return True;
- }
- return False;
- }
- Bool SDL_NAME(XDGAQueryExtension) (
- Display *dpy,
- int *event_basep,
- int *error_basep
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- if (XextHasExtension(info)) {
- *event_basep = info->codes->first_event;
- *error_basep = info->codes->first_error;
- return True;
- } else {
- return False;
- }
- }
- Bool SDL_NAME(XDGAQueryVersion)(
- Display *dpy,
- int *majorVersion,
- int *minorVersion
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGAQueryVersionReply rep;
- xXDGAQueryVersionReq *req;
- XDGACheckExtension (dpy, info, False);
- LockDisplay(dpy);
- GetReq(XDGAQueryVersion, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGAQueryVersion;
- if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
- UnlockDisplay(dpy);
- SyncHandle();
- return False;
- }
- *majorVersion = rep.majorVersion;
- *minorVersion = rep.minorVersion;
- UnlockDisplay(dpy);
- SyncHandle();
- if (*majorVersion >= 2)
- {
- int i, j;
- for (i = 0, j = info->codes->first_event;
- i < XF86DGANumberEvents;
- i++, j++)
- {
- XESetWireToEvent (dpy, j, xdga_wire_to_event);
- XESetEventToWire (dpy, j, xdga_event_to_wire);
- }
- SDL_NAME(XDGASetClientVersion)(dpy);
- }
- return True;
- }
- Bool SDL_NAME(XDGASetClientVersion)(
- Display *dpy
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGASetClientVersionReq *req;
- XDGACheckExtension (dpy, info, False);
- LockDisplay(dpy);
- GetReq(XDGASetClientVersion, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGASetClientVersion;
- req->major = XDGA_MAJOR_VERSION;
- req->minor = XDGA_MINOR_VERSION;
- UnlockDisplay(dpy);
- SyncHandle();
- return True;
- }
- Bool SDL_NAME(XDGAOpenFramebuffer)(
- Display *dpy,
- int screen
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGAOpenFramebufferReply rep;
- xXDGAOpenFramebufferReq *req;
- char *deviceName = NULL;
- Bool ret;
- XDGACheckExtension (dpy, info, False);
- LockDisplay(dpy);
- GetReq(XDGAOpenFramebuffer, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGAOpenFramebuffer;
- req->screen = screen;
- if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
- UnlockDisplay(dpy);
- SyncHandle();
- return False;
- }
- if(rep.length) {
- deviceName = Xmalloc(rep.length << 2);
- _XRead(dpy, deviceName, rep.length << 2);
- }
- ret = SDL_NAME(XDGAMapFramebuffer)(screen, deviceName,
- (unsigned char*)(long)rep.mem1,
- rep.size, rep.offset, rep.extra);
- if(deviceName)
- Xfree(deviceName);
- UnlockDisplay(dpy);
- SyncHandle();
- return ret;
- }
- void SDL_NAME(XDGACloseFramebuffer)(
- Display *dpy,
- int screen
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGACloseFramebufferReq *req;
- XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));
- SDL_NAME(XDGAUnmapFramebuffer)(screen);
- LockDisplay(dpy);
- GetReq(XDGACloseFramebuffer, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGACloseFramebuffer;
- req->screen = screen;
- UnlockDisplay(dpy);
- SyncHandle();
- }
- SDL_NAME(XDGAMode)* SDL_NAME(XDGAQueryModes)(
- Display *dpy,
- int screen,
- int *num
- ){
- XExtDisplayInfo *dinfo = SDL_NAME(xdga_find_display) (dpy);
- xXDGAQueryModesReply rep;
- xXDGAQueryModesReq *req;
- SDL_NAME(XDGAMode) *modes = NULL;
- *num = 0;
- XDGACheckExtension (dpy, dinfo, NULL);
- LockDisplay(dpy);
- GetReq(XDGAQueryModes, req);
- req->reqType = dinfo->codes->major_opcode;
- req->dgaReqType = X_XDGAQueryModes;
- req->screen = screen;
- if (_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
- if(rep.length) {
- xXDGAModeInfo info;
- int i, size;
- char *offset;
- size = rep.length << 2;
- size -= rep.number * sz_xXDGAModeInfo; /* find text size */
- modes = (SDL_NAME(XDGAMode)*)Xmalloc((rep.number * sizeof(SDL_NAME(XDGAMode))) + size);
- offset = (char*)(&modes[rep.number]); /* start of text */
- if(modes) {
- for(i = 0; i < rep.number; i++) {
- _XRead(dpy, (char*)(&info), sz_xXDGAModeInfo);
- modes[i].num = info.num;
- modes[i].verticalRefresh =
- (float)info.vsync_num / (float)info.vsync_den;
- modes[i].flags = info.flags;
- modes[i].imageWidth = info.image_width;
- modes[i].imageHeight = info.image_height;
- modes[i].pixmapWidth = info.pixmap_width;
- modes[i].pixmapHeight = info.pixmap_height;
- modes[i].bytesPerScanline = info.bytes_per_scanline;
- modes[i].byteOrder = info.byte_order;
- modes[i].depth = info.depth;
- modes[i].bitsPerPixel = info.bpp;
- modes[i].redMask = info.red_mask;
- modes[i].greenMask = info.green_mask;
- modes[i].blueMask = info.blue_mask;
- modes[i].visualClass = info.visual_class;
- modes[i].viewportWidth = info.viewport_width;
- modes[i].viewportHeight = info.viewport_height;
- modes[i].xViewportStep = info.viewport_xstep;
- modes[i].yViewportStep = info.viewport_ystep;
- modes[i].maxViewportX = info.viewport_xmax;
- modes[i].maxViewportY = info.viewport_ymax;
- modes[i].viewportFlags = info.viewport_flags;
- modes[i].reserved1 = info.reserved1;
- modes[i].reserved2 = info.reserved2;
- _XRead(dpy, offset, info.name_size);
- modes[i].name = offset;
- offset += info.name_size;
- }
- *num = rep.number;
- } else
- _XEatData(dpy, rep.length << 2);
- }
- }
- UnlockDisplay(dpy);
- SyncHandle();
- return modes;
- }
- SDL_NAME(XDGADevice) *
- SDL_NAME(XDGASetMode)(
- Display *dpy,
- int screen,
- int mode
- ){
- XExtDisplayInfo *dinfo = SDL_NAME(xdga_find_display) (dpy);
- xXDGASetModeReply rep;
- xXDGASetModeReq *req;
- SDL_NAME(XDGADevice) *dev = NULL;
- Pixmap pid;
- XDGACheckExtension (dpy, dinfo, NULL);
- LockDisplay(dpy);
- GetReq(XDGASetMode, req);
- req->reqType = dinfo->codes->major_opcode;
- req->dgaReqType = X_XDGASetMode;
- req->screen = screen;
- req->mode = mode;
- req->pid = pid = XAllocID(dpy);
- if (_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
- if(rep.length) {
- xXDGAModeInfo info;
- int size;
- size = rep.length << 2;
- size -= sz_xXDGAModeInfo; /* get text size */
- dev = (SDL_NAME(XDGADevice)*)Xmalloc(sizeof(SDL_NAME(XDGADevice)) + size);
- if(dev) {
- _XRead(dpy, (char*)(&info), sz_xXDGAModeInfo);
- dev->mode.num = info.num;
- dev->mode.verticalRefresh =
- (float)info.vsync_num / (float)info.vsync_den;
- dev->mode.flags = info.flags;
- dev->mode.imageWidth = info.image_width;
- dev->mode.imageHeight = info.image_height;
- dev->mode.pixmapWidth = info.pixmap_width;
- dev->mode.pixmapHeight = info.pixmap_height;
- dev->mode.bytesPerScanline = info.bytes_per_scanline;
- dev->mode.byteOrder = info.byte_order;
- dev->mode.depth = info.depth;
- dev->mode.bitsPerPixel = info.bpp;
- dev->mode.redMask = info.red_mask;
- dev->mode.greenMask = info.green_mask;
- dev->mode.blueMask = info.blue_mask;
- dev->mode.visualClass = info.visual_class;
- dev->mode.viewportWidth = info.viewport_width;
- dev->mode.viewportHeight = info.viewport_height;
- dev->mode.xViewportStep = info.viewport_xstep;
- dev->mode.yViewportStep = info.viewport_ystep;
- dev->mode.maxViewportX = info.viewport_xmax;
- dev->mode.maxViewportY = info.viewport_ymax;
- dev->mode.viewportFlags = info.viewport_flags;
- dev->mode.reserved1 = info.reserved1;
- dev->mode.reserved2 = info.reserved2;
- dev->mode.name = (char*)(&dev[1]);
- _XRead(dpy, dev->mode.name, info.name_size);
- dev->pixmap = (rep.flags & XDGAPixmap) ? pid : 0;
- dev->data = SDL_NAME(XDGAGetMappedMemory)(screen);
- if(dev->data)
- dev->data += rep.offset;
- }
- /* not sure what to do if the allocation fails */
- }
- }
- UnlockDisplay(dpy);
- SyncHandle();
- return dev;
- }
- void SDL_NAME(XDGASetViewport)(
- Display *dpy,
- int screen,
- int x,
- int y,
- int flags
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGASetViewportReq *req;
- XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));
- LockDisplay(dpy);
- GetReq(XDGASetViewport, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGASetViewport;
- req->screen = screen;
- req->x = x;
- req->y = y;
- req->flags = flags;
- UnlockDisplay(dpy);
- SyncHandle();
- }
- void SDL_NAME(XDGAInstallColormap)(
- Display *dpy,
- int screen,
- Colormap cmap
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGAInstallColormapReq *req;
- XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));
- LockDisplay(dpy);
- GetReq(XDGAInstallColormap, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGAInstallColormap;
- req->screen = screen;
- req->cmap = cmap;
- UnlockDisplay(dpy);
- SyncHandle();
- }
- void SDL_NAME(XDGASelectInput)(
- Display *dpy,
- int screen,
- long mask
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGASelectInputReq *req;
- XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));
- LockDisplay(dpy);
- GetReq(XDGASelectInput, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGASelectInput;
- req->screen = screen;
- req->mask = mask;
- UnlockDisplay(dpy);
- SyncHandle();
- }
- void SDL_NAME(XDGAFillRectangle)(
- Display *dpy,
- int screen,
- int x,
- int y,
- unsigned int width,
- unsigned int height,
- unsigned long color
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGAFillRectangleReq *req;
- XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));
- LockDisplay(dpy);
- GetReq(XDGAFillRectangle, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGAFillRectangle;
- req->screen = screen;
- req->x = x;
- req->y = y;
- req->width = width;
- req->height = height;
- req->color = color;
- UnlockDisplay(dpy);
- SyncHandle();
- }
- void SDL_NAME(XDGACopyArea)(
- Display *dpy,
- int screen,
- int srcx,
- int srcy,
- unsigned int width,
- unsigned int height,
- int dstx,
- int dsty
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGACopyAreaReq *req;
- XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));
- LockDisplay(dpy);
- GetReq(XDGACopyArea, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGACopyArea;
- req->screen = screen;
- req->srcx = srcx;
- req->srcy = srcy;
- req->width = width;
- req->height = height;
- req->dstx = dstx;
- req->dsty = dsty;
- UnlockDisplay(dpy);
- SyncHandle();
- }
- void SDL_NAME(XDGACopyTransparentArea)(
- Display *dpy,
- int screen,
- int srcx,
- int srcy,
- unsigned int width,
- unsigned int height,
- int dstx,
- int dsty,
- unsigned long key
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGACopyTransparentAreaReq *req;
- XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));
- LockDisplay(dpy);
- GetReq(XDGACopyTransparentArea, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGACopyTransparentArea;
- req->screen = screen;
- req->srcx = srcx;
- req->srcy = srcy;
- req->width = width;
- req->height = height;
- req->dstx = dstx;
- req->dsty = dsty;
- req->key = key;
- UnlockDisplay(dpy);
- SyncHandle();
- }
- int SDL_NAME(XDGAGetViewportStatus)(
- Display *dpy,
- int screen
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGAGetViewportStatusReply rep;
- xXDGAGetViewportStatusReq *req;
- int status = 0;
- XDGACheckExtension (dpy, info, 0);
- LockDisplay(dpy);
- GetReq(XDGAGetViewportStatus, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGAGetViewportStatus;
- req->screen = screen;
- if (!_XReply(dpy, (xReply *)&rep, 0, xFalse))
- status = rep.status;
- UnlockDisplay(dpy);
- SyncHandle();
- return status;
- }
- void SDL_NAME(XDGASync)(
- Display *dpy,
- int screen
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGASyncReply rep;
- xXDGASyncReq *req;
- XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));
- LockDisplay(dpy);
- GetReq(XDGASync, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGASync;
- req->screen = screen;
- _XReply(dpy, (xReply *)&rep, 0, xFalse);
- UnlockDisplay(dpy);
- SyncHandle();
- }
- void SDL_NAME(XDGAChangePixmapMode)(
- Display *dpy,
- int screen,
- int *x,
- int *y,
- int mode
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGAChangePixmapModeReq *req;
- xXDGAChangePixmapModeReply rep;
- XextSimpleCheckExtension (dpy, info, SDL_NAME(xdga_extension_name));
- LockDisplay(dpy);
- GetReq(XDGAChangePixmapMode, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGAChangePixmapMode;
- req->screen = screen;
- req->x = *x;
- req->y = *y;
- req->flags = mode;
- _XReply(dpy, (xReply *)&rep, 0, xFalse);
- *x = rep.x;
- *y = rep.y;
- UnlockDisplay(dpy);
- SyncHandle();
- }
- Colormap SDL_NAME(XDGACreateColormap)(
- Display *dpy,
- int screen,
- SDL_NAME(XDGADevice) *dev,
- int alloc
- ){
- XExtDisplayInfo *info = SDL_NAME(xdga_find_display) (dpy);
- xXDGACreateColormapReq *req;
- Colormap cid;
- XDGACheckExtension (dpy, info, -1);
- LockDisplay(dpy);
- GetReq(XDGACreateColormap, req);
- req->reqType = info->codes->major_opcode;
- req->dgaReqType = X_XDGACreateColormap;
- req->screen = screen;
- req->mode = dev->mode.num;
- req->alloc = alloc;
- cid = req->id = XAllocID(dpy);
- UnlockDisplay(dpy);
- SyncHandle();
- return cid;
- }
- void SDL_NAME(XDGAKeyEventToXKeyEvent)(
- SDL_NAME(XDGAKeyEvent)* dk,
- XKeyEvent* xk
- ){
- xk->type = dk->type;
- xk->serial = dk->serial;
- xk->send_event = False;
- xk->display = dk->display;
- xk->window = RootWindow(dk->display, dk->screen);
- xk->root = xk->window;
- xk->subwindow = None;
- xk->time = dk->time;
- xk->x = xk->y = xk->x_root = xk->y_root = 0;
- xk->state = dk->state;
- xk->keycode = dk->keycode;
- xk->same_screen = True;
- }
- #include <X11/Xmd.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 _DGAMapRec{
- unsigned char *physical;
- unsigned char *virtual;
- CARD32 size;
- int fd;
- int screen;
- struct _DGAMapRec *next;
- } DGAMapRec, *DGAMapPtr;
- static Bool
- DGAMapPhysical(int, char*, unsigned char*, CARD32, CARD32, CARD32, DGAMapPtr);
- static void DGAUnmapPhysical(DGAMapPtr);
- static DGAMapPtr _Maps = NULL;
- unsigned char*
- SDL_NAME(XDGAGetMappedMemory)(int screen)
- {
- DGAMapPtr pMap = _Maps;
- unsigned char *pntr = NULL;
- while(pMap != NULL) {
- if(pMap->screen == screen) {
- pntr = pMap->virtual;
- break;
- }
- pMap = pMap->next;
- }
- return pntr;
- }
- Bool
- SDL_NAME(XDGAMapFramebuffer)(
- int screen,
- char *name, /* optional device name */
- unsigned char* base, /* physical memory */
- CARD32 size, /* size */
- CARD32 offset, /* optional offset */
- CARD32 extra /* optional extra data */
- ){
- DGAMapPtr pMap = _Maps;
- Bool result;
- /* is it already mapped ? */
- while(pMap != NULL) {
- if(pMap->screen == screen)
- return True;
- pMap = pMap->next;
- }
- if(extra & XDGANeedRoot) {
- /* we should probably check if we have root permissions and
- return False here */
- }
- pMap = (DGAMapPtr)Xmalloc(sizeof(DGAMapRec));
- result = DGAMapPhysical(screen, name, base, size, offset, extra, pMap);
- if(result) {
- pMap->next = _Maps;
- _Maps = pMap;
- } else
- Xfree(pMap);
- return result;
- }
- void
- SDL_NAME(XDGAUnmapFramebuffer)(int screen)
- {
- DGAMapPtr pMap = _Maps;
- DGAMapPtr pPrev = NULL;
- /* is it already mapped */
- while(pMap != NULL) {
- if(pMap->screen == screen)
- break;
- pPrev = pMap;
- pMap = pMap->next;
- }
- if(!pMap)
- return;
- DGAUnmapPhysical(pMap);
- if(!pPrev)
- _Maps = pMap->next;
- else
- pPrev->next = pMap->next;
- Xfree(pMap);
- }
- static Bool
- DGAMapPhysical(
- int screen,
- char *name, /* optional device name */
- unsigned char* base, /* physical memory */
- CARD32 size, /* size */
- CARD32 offset, /* optional offset */
- CARD32 extra, /* optional extra data */
- DGAMapPtr pMap
- ) {
- #if defined(ISC) && defined(HAS_SVR3_MMAP)
- struct kd_memloc mloc;
- #elif defined(__EMX__)
- APIRET rc;
- ULONG action;
- HFILE hfd;
- #endif
- base += offset;
- pMap->screen = screen;
- pMap->physical = base;
- pMap->size = size;
- #if defined(ISC) && defined(HAS_SVR3_MMAP)
- if ((pMap->fd = open("/dev/mmap", O_RDWR)) < 0)
- return False;
- mloc.vaddr = (char *)0;
- mloc.physaddr = (char *)base;
- mloc.length = size;
- mloc.ioflg=1;
- if ((pMap->virtual = (void *)ioctl(pMap->fd, MAP, &mloc)) == (void *)-1)
- return False;
- #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 False;
- {
- 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 = base;
- pmap.size = size;
- rc = DosDevIOCtl(hfd, XFREE86_PMAP, PMAP_MAP,
- (PULONG)&pmap, sizeof(pmap), &plen,
- (PULONG)&dmap, sizeof(dmap), &dlen);
- if (rc == 0) {
- pMap->virtual = dmap.a.user;
- }
- }
- if (rc != 0)
- return False;
- #elif defined (Lynx)
- pMap->virtual = smem_create("XF86DGA", (char*)base, size, SM_READ|SM_WRITE);
- #else
- #ifndef MAP_FILE
- #define MAP_FILE 0
- #endif
- if (!name)
- name = DEV_MEM;
- if ((pMap->fd = open(name, O_RDWR)) < 0)
- #if defined(linux)
- { /* /dev/fb0 fallback added by Sam Lantinga <hercules@lokigames.com> */
- /* Try to fall back to /dev/fb on Linux - FIXME: verify the device */
- struct fb_fix_screeninfo finfo;
- if ((pMap->fd = open("/dev/fb0", O_RDWR)) < 0) {
- return False;
- }
- /* The useable framebuffer console memory may not be the whole
- framebuffer that X has access to. :-(
- */
- if ( ioctl(pMap->fd, FBIOGET_FSCREENINFO, &finfo) < 0 ) {
- close(pMap->fd);
- return False;
- }
- /* Warning: On PPC, the size and virtual need to be offset by:
- (((long)finfo.smem_start) -
- (((long)finfo.smem_start)&~(PAGE_SIZE-1)))
- */
- base = 0;
- size = finfo.smem_len;
- }
- #else
- return False;
- #endif
- pMap->virtual = mmap(NULL, size, PROT_READ | PROT_WRITE,
- MAP_FILE | MAP_SHARED, pMap->fd, (off_t)base);
- if (pMap->virtual == (void *)-1)
- return False;
- #endif
- #if !defined(ISC) && !defined(HAS_SVR3_MMAP) && !defined(Lynx)
- && !defined(__EMX__)
- mprotect(pMap->virtual, size, PROT_READ | PROT_WRITE);
- #endif
- return True;
- }
- static void
- DGAUnmapPhysical(DGAMapPtr pMap)
- {
- #if !defined(ISC) && !defined(HAS_SVR3_MMAP) && !defined(Lynx)
- && !defined(__EMX__)
- mprotect(pMap->virtual,pMap->size, PROT_READ);
- #elif defined(Lynx)
- /* XXX this doesn't allow enable after disable */
- smem_create(NULL, pMap->virtual, pMap->size, SM_DETACH);
- smem_remove("XF86DGA");
- #endif
- /* We need to unmap and close too !!!!!!!!!!*/
- }