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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 "xm_api.h"
#undef ASSERT
#undef Elements
#include "pipe/internal/p_winsys_screen.h"
#include "pipe/p_format.h"
#include "pipe/p_context.h"
#include "pipe/p_inlines.h"
#include "util/u_math.h"
#include "util/u_memory.h"
#include "softpipe/sp_winsys.h"
#include "softpipe/sp_texture.h"
#include "xlib.h"
/**
* Subclass of pipe_buffer for Xlib winsys.
* Low-level OS/window system memory buffer
*/
struct xm_buffer
{
struct pipe_buffer base;
boolean userBuffer; /** Is this a user-space buffer? */
void *data;
void *mapped;
XImage *tempImage;
#ifdef USE_XSHM
int shm;
XShmSegmentInfo shminfo;
#endif
};
/**
* Subclass of pipe_winsys for Xlib winsys
*/
struct xmesa_pipe_winsys
{
struct pipe_winsys base;
/* struct xmesa_visual *xm_visual; */
};
/** Cast wrapper */
static INLINE struct xm_buffer *
xm_buffer( struct pipe_buffer *buf )
{
return (struct xm_buffer *)buf;
}
/**
* X Shared Memory Image extension code
*/
#ifdef USE_XSHM
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_buffer *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_buffer *b, struct xmesa_buffer *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 *);
b->tempImage = XShmCreateImage(xmb->xm_visual->display,
xmb->xm_visual->visinfo->visual,
xmb->xm_visual->visinfo->depth,
ZPixmap,
NULL,
&b->shminfo,
width, height);
if (b->tempImage == NULL) {
b->shm = 0;
return;
}
mesaXErrorFlag = 0;
old_handler = XSetErrorHandler(mesaHandleXError);
/* This may trigger the X protocol error we're ready to catch: */
XShmAttach(xmb->xm_visual->display, &b->shminfo);
XSync(xmb->xm_visual->display, False);
if (mesaXErrorFlag) {
/* we are on a remote display, this error is normal, don't print it */
XFlush(xmb->xm_visual->display);
mesaXErrorFlag = 0;
XDestroyImage(b->tempImage);
b->tempImage = NULL;
b->shm = 0;
(void) XSetErrorHandler(old_handler);
return;
}
b->shm = 1;
}
#endif /* USE_XSHM */
/* Most callbacks map direcly onto dri_bufmgr operations:
*/
static void *
xm_buffer_map(struct pipe_winsys *pws, struct pipe_buffer *buf,
unsigned flags)
{
struct xm_buffer *xm_buf = xm_buffer(buf);
xm_buf->mapped = xm_buf->data;
return xm_buf->mapped;
}
static void
xm_buffer_unmap(struct pipe_winsys *pws, struct pipe_buffer *buf)
{
struct xm_buffer *xm_buf = xm_buffer(buf);
xm_buf->mapped = NULL;
}
static void
xm_buffer_destroy(struct pipe_buffer *buf)
{
struct xm_buffer *oldBuf = xm_buffer(buf);
if (oldBuf->data) {
#ifdef USE_XSHM
if (oldBuf->shminfo.shmid >= 0) {
shmdt(oldBuf->shminfo.shmaddr);
shmctl(oldBuf->shminfo.shmid, IPC_RMID, 0);
oldBuf->shminfo.shmid = -1;
oldBuf->shminfo.shmaddr = (char *) -1;
}
else
#endif
{
if (!oldBuf->userBuffer) {
align_free(oldBuf->data);
}
}
oldBuf->data = NULL;
}
free(oldBuf);
}
/**
* Display/copy the image in the surface into the X window specified
* by the XMesaBuffer.
*/
static void
xlib_softpipe_display_surface(struct xmesa_buffer *b,
struct pipe_surface *surf)
{
XImage *ximage;
struct softpipe_texture *spt = softpipe_texture(surf->texture);
struct xm_buffer *xm_buf = xm_buffer(spt->buffer);
static boolean no_swap = 0;
static boolean firsttime = 1;
if (firsttime) {
no_swap = getenv("SP_NO_RAST") != NULL;
firsttime = 0;
}
if (no_swap)
return;
#ifdef USE_XSHM
if (xm_buf->shm)
{
if (xm_buf->tempImage == NULL)
{
assert(surf->texture->block.width == 1);
assert(surf->texture->block.height == 1);
alloc_shm_ximage(xm_buf, b, spt->stride[surf->level] /
surf->texture->block.size, surf->height);
}
ximage = xm_buf->tempImage;
ximage->data = xm_buf->data;
/* _debug_printf("XSHM\n"); */
XShmPutImage(b->xm_visual->display, b->drawable, b->gc,
ximage, 0, 0, 0, 0, surf->width, surf->height, False);
}
else
#endif
{
/* display image in Window */
ximage = b->tempImage;
ximage->data = xm_buf->data;
/* check that the XImage has been previously initialized */
assert(ximage->format);
assert(ximage->bitmap_unit);
/* update XImage's fields */
ximage->width = surf->width;
ximage->height = surf->height;
ximage->bytes_per_line = spt->stride[surf->level];
/* _debug_printf("XPUT\n"); */
XPutImage(b->xm_visual->display, b->drawable, b->gc,
ximage, 0, 0, 0, 0, surf->width, surf->height);
}
}
static void
xm_flush_frontbuffer(struct pipe_winsys *pws,
struct pipe_surface *surf,
void *context_private)
{
/*
* The front color buffer is actually just another XImage buffer.
* This function copies that XImage to the actual X Window.
*/
XMesaContext xmctx = (XMesaContext) context_private;
xlib_softpipe_display_surface(xmctx->xm_buffer, surf);
}
static const char *
xm_get_name(struct pipe_winsys *pws)
{
return "Xlib";
}
static struct pipe_buffer *
xm_buffer_create(struct pipe_winsys *pws,
unsigned alignment,
unsigned usage,
unsigned size)
{
struct xm_buffer *buffer = CALLOC_STRUCT(xm_buffer);
pipe_reference_init(&buffer->base.reference, 1);
buffer->base.alignment = alignment;
buffer->base.usage = usage;
buffer->base.size = size;
if (buffer->data == NULL) {
/* align to 16-byte multiple for Cell */
buffer->data = align_malloc(size, max(alignment, 16));
}
return &buffer->base;
}
/**
* Create buffer which wraps user-space data.
*/
static struct pipe_buffer *
xm_user_buffer_create(struct pipe_winsys *pws, void *ptr, unsigned bytes)
{
struct xm_buffer *buffer = CALLOC_STRUCT(xm_buffer);
pipe_reference_init(&buffer->base.reference, 1);
buffer->base.size = bytes;
buffer->userBuffer = TRUE;
buffer->data = ptr;
return &buffer->base;
}
static struct pipe_buffer *
xm_surface_buffer_create(struct pipe_winsys *winsys,
unsigned width, unsigned height,
enum pipe_format format,
unsigned usage,
unsigned *stride)
{
const unsigned alignment = 64;
struct pipe_format_block block;
unsigned nblocksx, nblocksy, size;
pf_get_block(format, &block);
nblocksx = pf_get_nblocksx(&block, width);
nblocksy = pf_get_nblocksy(&block, height);
*stride = align(nblocksx * block.size, alignment);
size = *stride * nblocksy;
#ifdef USE_XSHM
if (!debug_get_bool_option("XLIB_NO_SHM", FALSE))
{
struct xm_buffer *buffer = CALLOC_STRUCT(xm_buffer);
pipe_reference_init(&buffer->base.reference, 1);
buffer->base.alignment = alignment;
buffer->base.usage = usage;
buffer->base.size = size;
buffer->userBuffer = FALSE;
buffer->shminfo.shmid = -1;
buffer->shminfo.shmaddr = (char *) -1;
buffer->shm = TRUE;
buffer->data = alloc_shm(buffer, size);
if (!buffer->data)
goto out;
return &buffer->base;
out:
if (buffer)
FREE(buffer);
}
#endif
return winsys->buffer_create(winsys, alignment,
usage,
size);
}
/*
* Fence functions - basically nothing to do, as we don't create any actual
* fence objects.
*/
static void
xm_fence_reference(struct pipe_winsys *sws, struct pipe_fence_handle **ptr,
struct pipe_fence_handle *fence)
{
}
static int
xm_fence_signalled(struct pipe_winsys *sws, struct pipe_fence_handle *fence,
unsigned flag)
{
return 0;
}
static int
xm_fence_finish(struct pipe_winsys *sws, struct pipe_fence_handle *fence,
unsigned flag)
{
return 0;
}
static struct pipe_winsys *
xlib_create_softpipe_winsys( void )
{
static struct xmesa_pipe_winsys *ws = NULL;
if (!ws) {
ws = CALLOC_STRUCT(xmesa_pipe_winsys);
/* Fill in this struct with callbacks that pipe will need to
* communicate with the window system, buffer manager, etc.
*/
ws->base.buffer_create = xm_buffer_create;
ws->base.user_buffer_create = xm_user_buffer_create;
ws->base.buffer_map = xm_buffer_map;
ws->base.buffer_unmap = xm_buffer_unmap;
ws->base.buffer_destroy = xm_buffer_destroy;
ws->base.surface_buffer_create = xm_surface_buffer_create;
ws->base.fence_reference = xm_fence_reference;
ws->base.fence_signalled = xm_fence_signalled;
ws->base.fence_finish = xm_fence_finish;
ws->base.flush_frontbuffer = xm_flush_frontbuffer;
ws->base.get_name = xm_get_name;
}
return &ws->base;
}
static struct pipe_screen *
xlib_create_softpipe_screen( void )
{
struct pipe_winsys *winsys;
struct pipe_screen *screen;
winsys = xlib_create_softpipe_winsys();
if (winsys == NULL)
return NULL;
screen = softpipe_create_screen(winsys);
if (screen == NULL)
goto fail;
return screen;
fail:
if (winsys)
winsys->destroy( winsys );
return NULL;
}
static struct pipe_context *
xlib_create_softpipe_context( struct pipe_screen *screen,
void *context_private )
{
struct pipe_context *pipe;
pipe = softpipe_create(screen);
if (pipe == NULL)
goto fail;
pipe->priv = context_private;
return pipe;
fail:
/* Free stuff here */
return NULL;
}
struct xm_driver xlib_softpipe_driver =
{
.create_pipe_screen = xlib_create_softpipe_screen,
.create_pipe_context = xlib_create_softpipe_context,
.display_surface = xlib_softpipe_display_surface
};
|