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/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Bismarck, ND., USA
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
*
**************************************************************************/
/*
* Authors:
* Keith Whitwell
* Brian Paul
*/
#include "pipe/p_format.h"
#include "pipe/p_context.h"
#include "util/u_inlines.h"
#include "util/u_format.h"
#include "util/u_math.h"
#include "util/u_memory.h"
#include "state_tracker/xlib_sw_winsys.h"
#include <X11/Xlib.h>
#include <X11/Xlibint.h>
#include <X11/Xutil.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
/**
* Display target for Xlib winsys.
* Low-level OS/window system memory buffer
*/
struct xm_displaytarget
{
enum pipe_format format;
unsigned width;
unsigned height;
unsigned stride;
void *data;
void *mapped;
Display *display;
Visual *visual;
XImage *tempImage;
GC gc;
/* This is the last drawable that this display target was presented
* against. May need to recreate gc, tempImage when this changes??
*/
Drawable drawable;
XShmSegmentInfo shminfo;
int shm;
};
/**
* Subclass of sw_winsys for Xlib winsys
*/
struct xlib_sw_winsys
{
struct sw_winsys base;
Display *display;
};
/** Cast wrapper */
static INLINE struct xm_displaytarget *
xm_displaytarget( struct sw_displaytarget *dt )
{
return (struct xm_displaytarget *)dt;
}
/**
* X Shared Memory Image extension code
*/
static volatile int mesaXErrorFlag = 0;
/**
* Catches potential Xlib errors.
*/
static int
mesaHandleXError(Display *dpy, XErrorEvent *event)
{
(void) dpy;
(void) event;
mesaXErrorFlag = 1;
return 0;
}
static char *alloc_shm(struct xm_displaytarget *buf, unsigned size)
{
XShmSegmentInfo *const shminfo = & buf->shminfo;
shminfo->shmid = shmget(IPC_PRIVATE, size, IPC_CREAT|0777);
if (shminfo->shmid < 0) {
return NULL;
}
shminfo->shmaddr = (char *) shmat(shminfo->shmid, 0, 0);
if (shminfo->shmaddr == (char *) -1) {
shmctl(shminfo->shmid, IPC_RMID, 0);
return NULL;
}
shminfo->readOnly = False;
return shminfo->shmaddr;
}
/**
* Allocate a shared memory XImage back buffer for the given XMesaBuffer.
*/
static void
alloc_shm_ximage(struct xm_displaytarget *xm_dt,
struct xlib_drawable *xmb,
unsigned width, unsigned height)
{
/*
* We have to do a _lot_ of error checking here to be sure we can
* really use the XSHM extension. It seems different servers trigger
* errors at different points if the extension won't work. Therefore
* we have to be very careful...
*/
int (*old_handler)(Display *, XErrorEvent *);
xm_dt->tempImage = XShmCreateImage(xm_dt->display,
xmb->visual,
xmb->depth,
ZPixmap,
NULL,
&xm_dt->shminfo,
width, height);
if (xm_dt->tempImage == NULL) {
xm_dt->shm = 0;
return;
}
mesaXErrorFlag = 0;
old_handler = XSetErrorHandler(mesaHandleXError);
/* This may trigger the X protocol error we're ready to catch: */
XShmAttach(xm_dt->display, &xm_dt->shminfo);
XSync(xm_dt->display, False);
if (mesaXErrorFlag) {
/* we are on a remote display, this error is normal, don't print it */
XFlush(xm_dt->display);
mesaXErrorFlag = 0;
XDestroyImage(xm_dt->tempImage);
xm_dt->tempImage = NULL;
xm_dt->shm = 0;
(void) XSetErrorHandler(old_handler);
return;
}
xm_dt->shm = 1;
}
static void
alloc_ximage(struct xm_displaytarget *xm_dt,
struct xlib_drawable *xmb,
unsigned width, unsigned height)
{
if (xm_dt->shm) {
alloc_shm_ximage(xm_dt, xmb, width, height);
return;
}
xm_dt->tempImage = XCreateImage(xm_dt->display,
xmb->visual,
xmb->depth,
ZPixmap, 0,
NULL, width, height,
8, 0);
}
static boolean
xm_is_displaytarget_format_supported( struct sw_winsys *ws,
unsigned tex_usage,
enum pipe_format format )
{
/* TODO: check visuals or other sensible thing here */
return TRUE;
}
static void *
xm_displaytarget_map(struct sw_winsys *ws,
struct sw_displaytarget *dt,
unsigned flags)
{
struct xm_displaytarget *xm_dt = xm_displaytarget(dt);
xm_dt->mapped = xm_dt->data;
return xm_dt->mapped;
}
static void
xm_displaytarget_unmap(struct sw_winsys *ws,
struct sw_displaytarget *dt)
{
struct xm_displaytarget *xm_dt = xm_displaytarget(dt);
xm_dt->mapped = NULL;
}
static void
xm_displaytarget_destroy(struct sw_winsys *ws,
struct sw_displaytarget *dt)
{
struct xm_displaytarget *xm_dt = xm_displaytarget(dt);
if (xm_dt->data) {
if (xm_dt->shminfo.shmid >= 0) {
shmdt(xm_dt->shminfo.shmaddr);
shmctl(xm_dt->shminfo.shmid, IPC_RMID, 0);
xm_dt->shminfo.shmid = -1;
xm_dt->shminfo.shmaddr = (char *) -1;
}
else {
FREE(xm_dt->data);
}
}
if (xm_dt->tempImage)
XDestroyImage(xm_dt->tempImage);
if (xm_dt->gc)
XFreeGC(xm_dt->display, xm_dt->gc);
FREE(xm_dt);
}
/**
* Display/copy the image in the surface into the X window specified
* by the XMesaBuffer.
*/
static void
xlib_sw_display(struct xlib_drawable *xlib_drawable,
struct sw_displaytarget *dt)
{
static boolean no_swap = 0;
static boolean firsttime = 1;
struct xm_displaytarget *xm_dt = xm_displaytarget(dt);
Display *display = xm_dt->display;
XImage *ximage;
if (firsttime) {
no_swap = getenv("SP_NO_RAST") != NULL;
firsttime = 0;
}
if (no_swap)
return;
if (xm_dt->drawable != xlib_drawable->drawable) {
if (xm_dt->gc) {
XFreeGC( display, xm_dt->gc );
xm_dt->gc = NULL;
}
if (xm_dt->tempImage) {
XDestroyImage( xm_dt->tempImage );
xm_dt->tempImage = NULL;
}
xm_dt->drawable = xlib_drawable->drawable;
}
if (xm_dt->tempImage == NULL) {
assert(util_format_get_blockwidth(xm_dt->format) == 1);
assert(util_format_get_blockheight(xm_dt->format) == 1);
alloc_ximage(xm_dt, xlib_drawable,
xm_dt->stride / util_format_get_blocksize(xm_dt->format),
xm_dt->height);
if (!xm_dt->tempImage)
return;
}
if (xm_dt->gc == NULL) {
xm_dt->gc = XCreateGC( display, xlib_drawable->drawable, 0, NULL );
XSetFunction( display, xm_dt->gc, GXcopy );
}
if (xm_dt->shm)
{
ximage = xm_dt->tempImage;
ximage->data = xm_dt->data;
/* _debug_printf("XSHM\n"); */
XShmPutImage(xm_dt->display, xlib_drawable->drawable, xm_dt->gc,
ximage, 0, 0, 0, 0, xm_dt->width, xm_dt->height, False);
}
else {
/* display image in Window */
ximage = xm_dt->tempImage;
ximage->data = xm_dt->data;
/* check that the XImage has been previously initialized */
assert(ximage->format);
assert(ximage->bitmap_unit);
/* update XImage's fields */
ximage->width = xm_dt->width;
ximage->height = xm_dt->height;
ximage->bytes_per_line = xm_dt->stride;
/* _debug_printf("XPUT\n"); */
XPutImage(xm_dt->display, xlib_drawable->drawable, xm_dt->gc,
ximage, 0, 0, 0, 0, xm_dt->width, xm_dt->height);
}
XFlush(xm_dt->display);
}
/**
* Display/copy the image in the surface into the X window specified
* by the XMesaBuffer.
*/
static void
xm_displaytarget_display(struct sw_winsys *ws,
struct sw_displaytarget *dt,
void *context_private)
{
struct xlib_drawable *xlib_drawable = (struct xlib_drawable *)context_private;
xlib_sw_display(xlib_drawable, dt);
}
static struct sw_displaytarget *
xm_displaytarget_create(struct sw_winsys *winsys,
unsigned tex_usage,
enum pipe_format format,
unsigned width, unsigned height,
unsigned alignment,
unsigned *stride)
{
struct xm_displaytarget *xm_dt;
unsigned nblocksy, size;
xm_dt = CALLOC_STRUCT(xm_displaytarget);
if(!xm_dt)
goto no_xm_dt;
xm_dt->display = ((struct xlib_sw_winsys *)winsys)->display;
xm_dt->format = format;
xm_dt->width = width;
xm_dt->height = height;
nblocksy = util_format_get_nblocksy(format, height);
xm_dt->stride = align(util_format_get_stride(format, width), alignment);
size = xm_dt->stride * nblocksy;
if (!debug_get_bool_option("XLIB_NO_SHM", FALSE))
{
xm_dt->shminfo.shmid = -1;
xm_dt->shminfo.shmaddr = (char *) -1;
xm_dt->shm = TRUE;
xm_dt->data = alloc_shm(xm_dt, size);
if(!xm_dt->data)
goto no_data;
}
if(!xm_dt->data) {
xm_dt->data = align_malloc(size, alignment);
if(!xm_dt->data)
goto no_data;
}
*stride = xm_dt->stride;
return (struct sw_displaytarget *)xm_dt;
no_data:
FREE(xm_dt);
no_xm_dt:
return NULL;
}
static struct sw_displaytarget *
xm_displaytarget_from_handle(struct sw_winsys *winsys,
const struct pipe_resource *templet,
struct winsys_handle *whandle,
unsigned *stride)
{
assert(0);
return NULL;
}
static boolean
xm_displaytarget_get_handle(struct sw_winsys *winsys,
struct sw_displaytarget *dt,
struct winsys_handle *whandle)
{
assert(0);
return FALSE;
}
static void
xm_destroy( struct sw_winsys *ws )
{
FREE(ws);
}
struct sw_winsys *
xlib_create_sw_winsys( Display *display )
{
struct xlib_sw_winsys *ws;
ws = CALLOC_STRUCT(xlib_sw_winsys);
if (!ws)
return NULL;
ws->display = display;
ws->base.destroy = xm_destroy;
ws->base.is_displaytarget_format_supported = xm_is_displaytarget_format_supported;
ws->base.displaytarget_create = xm_displaytarget_create;
ws->base.displaytarget_from_handle = xm_displaytarget_from_handle;
ws->base.displaytarget_get_handle = xm_displaytarget_get_handle;
ws->base.displaytarget_map = xm_displaytarget_map;
ws->base.displaytarget_unmap = xm_displaytarget_unmap;
ws->base.displaytarget_destroy = xm_displaytarget_destroy;
ws->base.displaytarget_display = xm_displaytarget_display;
return &ws->base;
}
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