* Last modified: Tue Dec 30 16:43:33 2014, <dmo2118@gmail.com>
* Killed the black margin on the right and bottom.
* Reduced the default grid size to 2.
+ * Last modified: Sun Oct 9 11:20:48 2016, <dmo2118@gmail.com>
+ * Updated for new xshm.c.
+ * Ditched USE_BIG_XIMAGE.
*/
#include <math.h>
/* It's a lot faster for me, though - D.O. */
#define USE_XIMAGE
-/* i.e. make the XImage the size of the screen. This is much faster when
- * gridsize = 1. (And SHM is turned off.) */
-#define USE_BIG_XIMAGE
-
/* Numbers are wave_table size, measured in # of unsigned integers.
* FPS/radius = 50/radius = 800/radius = 1500/Big-O memory usage
*
/* #define USE_FAST_SQRT_HACKISH */ /* 17.8 FPS/2873/4921/5395/O(lg(radius)) */
#define USE_FAST_SQRT_BIGTABLE2 /* 26.1 FPS/156/2242/5386/O(radius^2) */
-#ifndef USE_XIMAGE
-# undef HAVE_XSHM_EXTENSION /* only applicable when using XImages */
-#endif /* USE_XIMAGE */
-
#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
# include "xdbe.h"
#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
-#ifdef HAVE_XSHM_EXTENSION
+#ifdef USE_XIMAGE
# include "xshm.h"
-#endif /* HAVE_XSHM_EXTENSION */
+#endif /* USE_XIMAGE */
static const char *interference_defaults [] = {
".background: black",
GC copy_gc;
#ifdef USE_XIMAGE
XImage *ximage;
-#endif /* USE_XIMAGE */
-#ifdef HAVE_XSHM_EXTENSION
- Bool use_shm, shm_can_draw;
+ Bool shm_can_draw;
XShmSegmentInfo shm_info;
-#endif /* HAVE_XSHM_EXTENSION */
+#endif /* USE_XIMAGE */
/*
* Resources
{
#ifdef USE_XIMAGE
if(c->ximage) {
-# ifdef HAVE_XSHM_EXTENSION
- if(c->use_shm) {
- destroy_xshm_image(dpy, c->ximage, &c->shm_info);
- } else
-# endif
- {
- /* Don't let XDestroyImage free c->ximage->data. */
- thread_free(c->ximage->data);
- c->ximage->data = NULL;
- XDestroyImage(c->ximage);
- }
+ destroy_xshm_image(dpy, c->ximage, &c->shm_info);
}
#endif
if(c->colors <= 2)
free(c->pal);
- else
+ else if(c->pal)
free_colors(c->screen, c->cmap, c->pal, c->colors);
#ifndef USE_XIMAGE
c->ximage->data + (c->ximage->bytes_per_line * img_y),
c->ximage->bytes_per_line);
-# ifndef USE_BIG_XIMAGE
- /* Move the bits for this horizontal stripe to the server. */
-# ifdef HAVE_XSHM_EXTENSION
- if (!c->use_shm)
-# endif /* HAVE_XSHM_EXTENSION */
- XPutImage(c->dpy, TARGET(c), c->copy_gc, c->ximage,
- 0, 0, 0, g*j, c->ximage->width, c->ximage->height);
-# endif
-
-# if defined HAVE_XSHM_EXTENSION && !defined USE_BIG_XIMAGE
- if (c->use_shm)
-# endif
- {
-# if defined HAVE_XSHM_EXTENSION || defined USE_BIG_XIMAGE
- scanline = (char *)scanline + c->ximage->bytes_per_line * g * c->threadpool.count;
- img_y += g * c->threadpool.count;
-# endif
- }
+ scanline = (char *)scanline +
+ c->ximage->bytes_per_line * g * c->threadpool.count;
+ img_y += g * c->threadpool.count;
#endif /* USE_XIMAGE */
}
/* Set the width so that each thread can work on a different line. */
unsigned align = thread_memory_alignment(dpy) * 8 - 1;
unsigned wbits, w, h;
+#endif /* USE_XIMAGE */
c->w = xgwa->width;
c->h = xgwa->height;
c->w_div_g = (c->w + c->grid_size - 1) / c->grid_size;
c->h_div_g = (c->h + c->grid_size - 1) / c->grid_size;
+
+#ifdef USE_XIMAGE
w = c->w_div_g * c->grid_size;
h = c->h_div_g * c->grid_size;
/* The width of a scan line, in *bits*. */
wbits = (w * c->bits_per_pixel + align) & ~align;
-# ifdef HAVE_XSHM_EXTENSION
- /*
- * Interference used to put one row at a time to the X server. This changes
- * today.
- *
- * XShmPutImage is asynchronous; the contents of the XImage must not be
- * modified until the server has placed the data on the screen. Waiting for
- * an XShmCompletionEvent after every line of pixels is a little nutty, so
- * shared-memory XImages will cover the entire screen, and it only has to be
- * sent once per frame.
- *
- * The non-SHM code, on the other hand is noticeably slower when
- * gridsize = 1 with one row at a time. If, on the other hand, gridsize >= 2,
- * there's a slight speed increase with one row at a time.
- *
- * This uses a lot more RAM than the single line approach. Users with only
- * 4 MB of RAM may wish to disable USE_BIG_XIMAGE and specify -no-shm on the
- * command line. Since this is 2013 and desktop computers are shipping with
- * 8 GB of RAM, I doubt that this will be a major issue. - D.O.
+ /* This uses a lot more RAM than the single line approach. Users without
+ * enough RAM to fit even a single framebuffer should consider an upgrade for
+ * their 386. - D.O.
*/
- if (c->use_shm)
- {
- c->ximage = create_xshm_image(dpy, xgwa->visual, xgwa->depth,
- ZPixmap, 0, &c->shm_info,
- wbits / c->bits_per_pixel, h);
- if (!c->ximage)
- c->use_shm = False;
- /* If create_xshm_image fails, it will not be attempted again. */
-
- c->shm_can_draw = True;
- }
-# endif /* HAVE_XSHM_EXTENSION */
+ c->ximage = create_xshm_image(dpy, xgwa->visual, xgwa->depth,
+ ZPixmap, &c->shm_info,
+ wbits / c->bits_per_pixel, h);
- if (!c->ximage)
- {
- c->ximage =
- XCreateImage(dpy, xgwa->visual,
- xgwa->depth, ZPixmap, 0, 0, /* depth, fmt, offset, data */
- w, /* width */
-# ifdef USE_BIG_XIMAGE
- h, /* height */
-# else
- c->grid_size, /* height */
-# endif
- 8, wbits / 8); /* pad, bpl */
-
- if(c->ximage)
- {
- if(thread_malloc((void **)&c->ximage->data, dpy,
- c->ximage->height * c->ximage->bytes_per_line))
- {
- XFree(c->ximage);
- c->ximage = NULL;
- }
- }
- }
+ c->shm_can_draw = True;
check_no_mem(dpy, c, c->ximage);
#endif /* USE_XIMAGE */
&c->threadpool,
&cls,
dpy,
-#if defined USE_XIMAGE && defined USE_BIG_XIMAGE
+#ifdef USE_XIMAGE
hardware_concurrency(dpy)
#else
1
- /* At least three issues with threads without USE_BIG_XIMAGE:
+ /* At least two issues with threads without USE_XIMAGE:
* 1. Most of Xlib isn't thread safe without XInitThreads.
- * 2. X(Un)LockDisplay would need to be called for each line, which is terrible.
- * 3. There's only one XImage buffer at the moment.
+ * 2. X(Un)LockDisplay would need to be called for each line, which is
+ * terrible.
*/
#endif
);
XGetWindowAttributes(c->dpy, c->win, &xgwa);
c->cmap = xgwa.colormap;
c->screen = xgwa.screen;
- c->bits_per_pixel = get_bits_per_pixel(c->dpy, xgwa.depth);
+ c->bits_per_pixel = visual_pixmap_depth(xgwa.screen, xgwa.visual);
check_no_mem(dpy, c, (void *)(ptrdiff_t)c->bits_per_pixel);
-#ifdef HAVE_XSHM_EXTENSION
- c->use_shm = get_boolean_resource(dpy, "useSHM", "Boolean");
-#endif /* HAVE_XSHM_EXTENSION */
-
val.function = GXcopy;
c->copy_gc = XCreateGC(c->dpy, TARGET(c), GCFunction, &val);
c->pal[1].pixel = WhitePixel(c->dpy, DefaultScreen(c->dpy));
}
-#ifdef HAVE_XSHM_EXTENSION
- if(c->use_shm)
- dbuf = False;
+#ifdef USE_XIMAGE
+ dbuf = False;
/* Double-buffering doesn't work with MIT-SHM: XShmPutImage must draw to the
* window. Otherwise, XShmCompletion events will have the XAnyEvent::window
- * field set to the back buffer, and XScreenSaver will ignore the event. */
+ * field set to the back buffer, and XScreenSaver will ignore the event.
+ */
#endif
if (dbuf)
double now;
float elapsed;
-#if defined USE_XIMAGE && defined HAVE_XSHM_EXTENSION
+#ifdef USE_XIMAGE
/* Wait a little while for the XServer to become ready if necessary. */
- if(c->use_shm && !c->shm_can_draw)
+ if(!c->shm_can_draw)
return 2000;
#endif
threadpool_run(&c->threadpool, inter_thread_run);
threadpool_wait(&c->threadpool);
-#ifdef HAVE_XSHM_EXTENSION
- if (c->use_shm)
- {
- XShmPutImage(c->dpy, c->win, c->copy_gc, c->ximage,
- 0, 0, 0, 0, c->ximage->width, c->ximage->height,
- True);
- c->shm_can_draw = False;
- }
-#endif
-#if defined HAVE_XSHM_EXTENSION && defined USE_BIG_XIMAGE
- else
-#endif
-#ifdef USE_BIG_XIMAGE
- {
- XPutImage(c->dpy, TARGET(c), c->copy_gc, c->ximage,
- 0, 0, 0, 0, c->ximage->width, c->ximage->height);
- }
+#ifdef USE_XIMAGE
+ put_xshm_image(c->dpy, c->win, c->copy_gc, c->ximage, 0, 0, 0, 0,
+ c->ximage->width, c->ximage->height, &c->shm_info);
+ /* c->shm_can_draw = False; */
#endif
#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
#if HAVE_XSHM_EXTENSION
struct inter_context *c = (struct inter_context *) closure;
- if(c->use_shm && event->type == XShmGetEventBase(dpy) + ShmCompletion)
+ if(event->type == XShmGetEventBase(dpy) + ShmCompletion)
{
c->shm_can_draw = True;
return True;
projects / xscreensaver / blobdiff