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Diffstat (limited to 'src/gallium/winsys/sw/xlib/xlib_sw_winsys.c')
-rw-r--r--src/gallium/winsys/sw/xlib/xlib_sw_winsys.c464
1 files changed, 464 insertions, 0 deletions
diff --git a/src/gallium/winsys/sw/xlib/xlib_sw_winsys.c b/src/gallium/winsys/sw/xlib/xlib_sw_winsys.c
new file mode 100644
index 00000000000..54789d7a87c
--- /dev/null
+++ b/src/gallium/winsys/sw/xlib/xlib_sw_winsys.c
@@ -0,0 +1,464 @@
+/**************************************************************************
+ *
+ * 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>
+
+/**
+ * Subclass of pipe_buffer 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);
+ }
+}
+
+/**
+ * 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_texture *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;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-25 15:39:50 +0000