1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Bismarck, ND., USA
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
18 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20 * USE OR OTHER DEALINGS IN THE SOFTWARE.
22 * The above copyright notice and this permission notice (including the
23 * next paragraph) shall be included in all copies or substantial portions
27 **************************************************************************/
41 #include "pipe/internal/p_winsys_screen.h"
42 #include "pipe/p_format.h"
43 #include "pipe/p_context.h"
44 #include "pipe/p_inlines.h"
45 #include "util/u_math.h"
46 #include "util/u_memory.h"
47 #include "softpipe/sp_winsys.h"
48 #include "softpipe/sp_texture.h"
53 * Subclass of pipe_buffer for Xlib winsys.
54 * Low-level OS/window system memory buffer
58 struct pipe_buffer base
;
59 boolean userBuffer
; /** Is this a user-space buffer? */
66 XShmSegmentInfo shminfo
;
72 * Subclass of pipe_winsys for Xlib winsys
74 struct xmesa_pipe_winsys
76 struct pipe_winsys base
;
77 /* struct xmesa_visual *xm_visual; */
86 static INLINE
struct xm_buffer
*
87 xm_buffer( struct pipe_buffer
*buf
)
89 return (struct xm_buffer
*)buf
;
94 * X Shared Memory Image extension code
97 #define XSHM_ENABLED(b) ((b)->shm)
99 #define XSHM_ENABLED(b) 0
104 static volatile int mesaXErrorFlag
= 0;
107 * Catches potential Xlib errors.
110 mesaHandleXError(Display
*dpy
, XErrorEvent
*event
)
119 static GLboolean
alloc_shm(struct xm_buffer
*buf
, unsigned size
)
121 XShmSegmentInfo
*const shminfo
= & buf
->shminfo
;
123 shminfo
->shmid
= shmget(IPC_PRIVATE
, size
, IPC_CREAT
|0777);
124 if (shminfo
->shmid
< 0) {
128 shminfo
->shmaddr
= (char *) shmat(shminfo
->shmid
, 0, 0);
129 if (shminfo
->shmaddr
== (char *) -1) {
130 shmctl(shminfo
->shmid
, IPC_RMID
, 0);
134 shminfo
->readOnly
= False
;
140 * Allocate a shared memory XImage back buffer for the given XMesaBuffer.
143 alloc_shm_ximage(struct xm_buffer
*b
, struct xmesa_buffer
*xmb
,
144 unsigned width
, unsigned height
)
147 * We have to do a _lot_ of error checking here to be sure we can
148 * really use the XSHM extension. It seems different servers trigger
149 * errors at different points if the extension won't work. Therefore
150 * we have to be very careful...
152 int (*old_handler
)(Display
*, XErrorEvent
*);
154 b
->tempImage
= XShmCreateImage(xmb
->xm_visual
->display
,
155 xmb
->xm_visual
->visinfo
->visual
,
156 xmb
->xm_visual
->visinfo
->depth
,
161 if (b
->tempImage
== NULL
) {
168 old_handler
= XSetErrorHandler(mesaHandleXError
);
169 /* This may trigger the X protocol error we're ready to catch: */
170 XShmAttach(xmb
->xm_visual
->display
, &b
->shminfo
);
171 XSync(xmb
->xm_visual
->display
, False
);
173 if (mesaXErrorFlag
) {
174 /* we are on a remote display, this error is normal, don't print it */
175 XFlush(xmb
->xm_visual
->display
);
177 XDestroyImage(b
->tempImage
);
180 (void) XSetErrorHandler(old_handler
);
187 #endif /* USE_XSHM */
191 /* Most callbacks map direcly onto dri_bufmgr operations:
194 xm_buffer_map(struct pipe_winsys
*pws
, struct pipe_buffer
*buf
,
197 struct xm_buffer
*xm_buf
= xm_buffer(buf
);
198 xm_buf
->mapped
= xm_buf
->data
;
199 return xm_buf
->mapped
;
203 xm_buffer_unmap(struct pipe_winsys
*pws
, struct pipe_buffer
*buf
)
205 struct xm_buffer
*xm_buf
= xm_buffer(buf
);
206 xm_buf
->mapped
= NULL
;
210 xm_buffer_destroy(struct pipe_buffer
*buf
)
212 struct xm_buffer
*oldBuf
= xm_buffer(buf
);
216 if (oldBuf
->shminfo
.shmid
>= 0) {
217 shmdt(oldBuf
->shminfo
.shmaddr
);
218 shmctl(oldBuf
->shminfo
.shmid
, IPC_RMID
, 0);
220 oldBuf
->shminfo
.shmid
= -1;
221 oldBuf
->shminfo
.shmaddr
= (char *) -1;
226 if (!oldBuf
->userBuffer
) {
227 align_free(oldBuf
->data
);
239 * Display/copy the image in the surface into the X window specified
240 * by the XMesaBuffer.
243 xlib_softpipe_display_surface(struct xmesa_buffer
*b
,
244 struct pipe_surface
*surf
)
247 struct softpipe_texture
*spt
= softpipe_texture(surf
->texture
);
248 struct xm_buffer
*xm_buf
= xm_buffer(spt
->buffer
);
249 static boolean no_swap
= 0;
250 static boolean firsttime
= 1;
253 no_swap
= getenv("SP_NO_RAST") != NULL
;
261 if (XSHM_ENABLED(xm_buf
) && (xm_buf
->tempImage
== NULL
)) {
262 assert(surf
->texture
->block
.width
== 1);
263 assert(surf
->texture
->block
.height
== 1);
264 alloc_shm_ximage(xm_buf
, b
, spt
->stride
[surf
->level
] /
265 surf
->texture
->block
.size
, surf
->height
);
269 ximage
= (XSHM_ENABLED(xm_buf
)) ? xm_buf
->tempImage
: b
->tempImage
;
270 ximage
->data
= xm_buf
->data
;
272 /* display image in Window */
274 if (XSHM_ENABLED(xm_buf
)) {
275 XShmPutImage(b
->xm_visual
->display
, b
->drawable
, b
->gc
,
276 ximage
, 0, 0, 0, 0, surf
->width
, surf
->height
, False
);
280 /* check that the XImage has been previously initialized */
281 assert(ximage
->format
);
282 assert(ximage
->bitmap_unit
);
284 /* update XImage's fields */
285 ximage
->width
= surf
->width
;
286 ximage
->height
= surf
->height
;
287 ximage
->bytes_per_line
= spt
->stride
[surf
->level
];
289 XPutImage(b
->xm_visual
->display
, b
->drawable
, b
->gc
,
290 ximage
, 0, 0, 0, 0, surf
->width
, surf
->height
);
296 xm_flush_frontbuffer(struct pipe_winsys
*pws
,
297 struct pipe_surface
*surf
,
298 void *context_private
)
301 * The front color buffer is actually just another XImage buffer.
302 * This function copies that XImage to the actual X Window.
304 XMesaContext xmctx
= (XMesaContext
) context_private
;
305 xlib_softpipe_display_surface(xmctx
->xm_buffer
, surf
);
311 xm_get_name(struct pipe_winsys
*pws
)
317 static struct pipe_buffer
*
318 xm_buffer_create(struct pipe_winsys
*pws
,
323 struct xm_buffer
*buffer
= CALLOC_STRUCT(xm_buffer
);
325 struct xmesa_pipe_winsys
*xpws
= (struct xmesa_pipe_winsys
*) pws
;
327 buffer
->shminfo
.shmid
= -1;
328 buffer
->shminfo
.shmaddr
= (char *) -1;
330 if (xpws
->shm
&& (usage
& PIPE_BUFFER_USAGE_PIXEL
) != 0) {
331 buffer
->shm
= xpws
->shm
;
333 if (alloc_shm(buffer
, size
)) {
334 buffer
->data
= buffer
->shminfo
.shmaddr
;
340 pipe_reference_init(&buffer
->base
.reference
, 1);
341 buffer
->base
.alignment
= alignment
;
342 buffer
->base
.usage
= usage
;
343 buffer
->base
.size
= size
;
345 if (buffer
->data
== NULL
) {
346 /* align to 16-byte multiple for Cell */
347 buffer
->data
= align_malloc(size
, max(alignment
, 16));
350 return &buffer
->base
;
355 * Create buffer which wraps user-space data.
357 static struct pipe_buffer
*
358 xm_user_buffer_create(struct pipe_winsys
*pws
, void *ptr
, unsigned bytes
)
360 struct xm_buffer
*buffer
= CALLOC_STRUCT(xm_buffer
);
361 pipe_reference_init(&buffer
->base
.reference
, 1);
362 buffer
->base
.size
= bytes
;
363 buffer
->userBuffer
= TRUE
;
369 return &buffer
->base
;
373 static struct pipe_buffer
*
374 xm_surface_buffer_create(struct pipe_winsys
*winsys
,
375 unsigned width
, unsigned height
,
376 enum pipe_format format
,
381 const unsigned alignment
= 64;
382 struct pipe_format_block block
;
383 unsigned nblocksx
, nblocksy
;
385 pf_get_block(format
, &block
);
386 nblocksx
= pf_get_nblocksx(&block
, width
);
387 nblocksy
= pf_get_nblocksy(&block
, height
);
388 *stride
= align(nblocksx
* block
.size
, alignment
);
390 return winsys
->buffer_create(winsys
, alignment
,
397 * Fence functions - basically nothing to do, as we don't create any actual
402 xm_fence_reference(struct pipe_winsys
*sws
, struct pipe_fence_handle
**ptr
,
403 struct pipe_fence_handle
*fence
)
409 xm_fence_signalled(struct pipe_winsys
*sws
, struct pipe_fence_handle
*fence
,
417 xm_fence_finish(struct pipe_winsys
*sws
, struct pipe_fence_handle
*fence
,
425 static struct pipe_winsys
*
426 xlib_create_softpipe_winsys( void )
428 static struct xmesa_pipe_winsys
*ws
= NULL
;
431 ws
= CALLOC_STRUCT(xmesa_pipe_winsys
);
433 /* Fill in this struct with callbacks that pipe will need to
434 * communicate with the window system, buffer manager, etc.
436 ws
->base
.buffer_create
= xm_buffer_create
;
437 ws
->base
.user_buffer_create
= xm_user_buffer_create
;
438 ws
->base
.buffer_map
= xm_buffer_map
;
439 ws
->base
.buffer_unmap
= xm_buffer_unmap
;
440 ws
->base
.buffer_destroy
= xm_buffer_destroy
;
442 ws
->base
.surface_buffer_create
= xm_surface_buffer_create
;
444 ws
->base
.fence_reference
= xm_fence_reference
;
445 ws
->base
.fence_signalled
= xm_fence_signalled
;
446 ws
->base
.fence_finish
= xm_fence_finish
;
448 ws
->base
.flush_frontbuffer
= xm_flush_frontbuffer
;
449 ws
->base
.get_name
= xm_get_name
;
456 static struct pipe_screen
*
457 xlib_create_softpipe_screen( void )
459 struct pipe_winsys
*winsys
;
460 struct pipe_screen
*screen
;
462 winsys
= xlib_create_softpipe_winsys();
466 screen
= softpipe_create_screen(winsys
);
474 winsys
->destroy( winsys
);
480 static struct pipe_context
*
481 xlib_create_softpipe_context( struct pipe_screen
*screen
,
482 void *context_private
)
484 struct pipe_context
*pipe
;
486 pipe
= softpipe_create(screen
);
490 pipe
->priv
= context_private
;
494 /* Free stuff here */
498 struct xm_driver xlib_softpipe_driver
=
500 .create_pipe_screen
= xlib_create_softpipe_screen
,
501 .create_pipe_context
= xlib_create_softpipe_context
,
502 .display_surface
= xlib_softpipe_display_surface