diff options
Diffstat (limited to 'src/gallium/winsys/xlib/xlib_softpipe.c')
| -rw-r--r-- | src/gallium/winsys/xlib/xlib_softpipe.c | 507 |
1 files changed, 507 insertions, 0 deletions
diff --git a/src/gallium/winsys/xlib/xlib_softpipe.c b/src/gallium/winsys/xlib/xlib_softpipe.c new file mode 100644 index 0000000000..67fea023a3 --- /dev/null +++ b/src/gallium/winsys/xlib/xlib_softpipe.c @@ -0,0 +1,507 @@ +/************************************************************************** + * + * 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); + xmesa_check_and_update_buffer_size(xmctx, xmctx->xm_buffer); +} + + + +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 +}; + + + |