/************************************************************************** * * 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; */ #ifdef USE_XSHM int shm; #endif }; /** 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 #define XSHM_ENABLED(b) ((b)->shm) #else #define XSHM_ENABLED(b) 0 #endif #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 GLboolean 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 GL_FALSE; } shminfo->shmaddr = (char *) shmat(shminfo->shmid, 0, 0); if (shminfo->shmaddr == (char *) -1) { shmctl(shminfo->shmid, IPC_RMID, 0); return GL_FALSE; } shminfo->readOnly = False; return GL_TRUE; } /** * 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 (XSHM_ENABLED(xm_buf) && (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); } #endif ximage = (XSHM_ENABLED(xm_buf)) ? xm_buf->tempImage : b->tempImage; ximage->data = xm_buf->data; /* display image in Window */ #ifdef USE_XSHM if (XSHM_ENABLED(xm_buf)) { XShmPutImage(b->xm_visual->display, b->drawable, b->gc, ximage, 0, 0, 0, 0, surf->width, surf->height, False); } else #endif { /* 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]; 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); #ifdef USE_XSHM struct xmesa_pipe_winsys *xpws = (struct xmesa_pipe_winsys *) pws; buffer->shminfo.shmid = -1; buffer->shminfo.shmaddr = (char *) -1; if (xpws->shm && (usage & PIPE_BUFFER_USAGE_PIXEL) != 0) { buffer->shm = xpws->shm; if (alloc_shm(buffer, size)) { buffer->data = buffer->shminfo.shmaddr; buffer->shm = 1; } } #endif 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; #ifdef USE_XSHM buffer->shm = 0; #endif 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 tex_usage, unsigned *stride) { const unsigned alignment = 64; struct pipe_format_block block; unsigned nblocksx, nblocksy; pf_get_block(format, &block); nblocksx = pf_get_nblocksx(&block, width); nblocksy = pf_get_nblocksy(&block, height); *stride = align(nblocksx * block.size, alignment); return winsys->buffer_create(winsys, alignment, usage, *stride * nblocksy); } /* * 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 };