X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=utils%2Fgrabscreen.c;h=328029e33eb2d785753cdf97e33ec5d30fb6ca2a;hb=585e1a6717d1dd9b90fbb53acaaae82106354d33;hp=7e4a37a3dc46b4a7018dc1f8965aa1ef2711d6f6;hpb=ce3185de9d9705e259f2b60dd4b5509007fa17d4;p=xscreensaver diff --git a/utils/grabscreen.c b/utils/grabscreen.c index 7e4a37a3..328029e3 100644 --- a/utils/grabscreen.c +++ b/utils/grabscreen.c @@ -34,7 +34,6 @@ #include "usleep.h" #include "colors.h" #include "grabscreen.h" -#include "sgivideo.h" #include "visual.h" #include "resources.h" @@ -52,8 +51,9 @@ static void copy_default_colormap_contents (Screen *, Colormap, Visual *); -#if defined(HAVE_READ_DISPLAY_EXTENSION) || defined(HAVE_SGI_VIDEO) -static void make_cubic_colormap (Screen *, Window, Visual *); +#ifdef HAVE_READ_DISPLAY_EXTENSION +static void allocate_cubic_colormap (Screen *, Window, Visual *); +void remap_image (Screen *, Window, Colormap, XImage *); #endif @@ -64,19 +64,23 @@ MapNotify_event_p (Display *dpy, XEvent *event, XPointer window) event->xvisibility.window == (Window) window); } -#ifdef DEBUG extern char *progname; -#endif /* DEBUG */ +Bool grab_verbose_p = False; + +void +grabscreen_verbose(void) +{ + grab_verbose_p = True; +} static void raise_window(Display *dpy, Window window, Bool dont_wait) { -#ifdef DEBUG - fprintf(stderr, "%s: raising window 0x%08lX (%s)\n", - progname, (unsigned long) window, - (dont_wait ? "not waiting" : "waiting")); -#endif /* DEBUG */ + if (grab_verbose_p) + fprintf(stderr, "%s: raising window 0x%08lX (%s)\n", + progname, (unsigned long) window, + (dont_wait ? "not waiting" : "waiting")); if (! dont_wait) { @@ -92,6 +96,8 @@ raise_window(Display *dpy, Window window, Bool dont_wait) hints.height = xgwa.height; hints.flags |= (PPosition|USPosition|PSize|USSize); XSetWMNormalHints(dpy, window, &hints); + + XSelectInput (dpy, window, (xgwa.your_event_mask | StructureNotifyMask)); } XMapRaised(dpy, window); @@ -132,7 +138,10 @@ BadWindow_ehandler (Display *dpy, XErrorEvent *error) if (error->error_code == BadWindow || error->error_code == BadDrawable) return 0; else if (!old_ehandler) - abort(); + { + abort(); + return 0; + } else return (*old_ehandler) (dpy, error); } @@ -200,8 +209,8 @@ install_screen_colormaps (Screen *screen) } -static void -grab_screen_image_1 (Screen *screen, Window window) +void +grab_screen_image (Screen *screen, Window window) { Display *dpy = DisplayOfScreen (screen); XWindowAttributes xgwa; @@ -236,19 +245,19 @@ grab_screen_image_1 (Screen *screen, Window window) unmap_time = unmap * 100000; } -#ifdef DEBUG - fprintf(stderr, - "\n%s: window 0x%08lX root: %d saver: %d grab: %d wait: %.1f\n", - progname, (unsigned long) window, - root_p, saver_p, grab_mouse_p, ((double)unmap_time)/1000000.0); - { - XWindowAttributes xgwa2; - XGetWindowAttributes (dpy, window, &xgwa2); - fprintf(stderr, "%s: ", progname); - describe_visual(stderr, screen, xgwa2.visual, ####); - fprintf (stderr, "\n"); - } -#endif /* DEBUG */ + if (grab_verbose_p) + { + XWindowAttributes xgwa2; + fprintf(stderr, + "\n%s: window 0x%08lX root: %d saver: %d grab: %d wait: %.1f\n", + progname, (unsigned long) window, + root_p, saver_p, grab_mouse_p, ((double)unmap_time)/1000000.0); + + XGetWindowAttributes (dpy, window, &xgwa2); + fprintf(stderr, "%s: ", progname); + describe_visual(stderr, screen, xgwa2.visual, False); + fprintf (stderr, "\n"); + } if (!root_p) XSetWindowBackgroundPixmap (dpy, window, None); @@ -280,11 +289,20 @@ grab_screen_image_1 (Screen *screen, Window window) if (! read_display(screen, window, 0, saver_p)) #endif /* HAVE_READ_DISPLAY_EXTENSION */ { -#if defined(HAVE_READ_DISPLAY_EXTENSION) && defined(DEBUG) - fprintf(stderr, "%s: read_display() failed\n", progname); -#endif /* DEBUG */ +#ifdef HAVE_READ_DISPLAY_EXTENSION + if (grab_verbose_p) + fprintf(stderr, "%s: read_display() failed\n", progname); +#endif /* HAVE_READ_DISPLAY_EXTENSION */ + copy_default_colormap_contents (screen, xgwa.colormap, xgwa.visual); raise_window(dpy, window, saver_p); + + /* Generally it's bad news to call XInstallColormap() explicitly, + but this file does a lot of sleazy stuff already... This is to + make sure that the window's colormap is installed, even in the + case where the window is OverrideRedirect. */ + if (xgwa.colormap) XInstallColormap (dpy, xgwa.colormap); + XSync (dpy, False); } } else /* root_p */ @@ -302,9 +320,10 @@ grab_screen_image_1 (Screen *screen, Window window) XGCValues gcv; GC gc; -#if defined(HAVE_READ_DISPLAY_EXTENSION) && defined(DEBUG) - fprintf(stderr, "%s: read_display() failed\n", progname); -#endif /* DEBUG */ +#ifdef HAVE_READ_DISPLAY_EXTENSION + if (grab_verbose_p) + fprintf(stderr, "%s: read_display() failed\n", progname); +#endif /* HAVE_READ_DISPLAY_EXTENSION */ copy_default_colormap_contents (screen, xgwa.colormap, xgwa.visual); @@ -319,6 +338,11 @@ grab_screen_image_1 (Screen *screen, Window window) XFreePixmap (dpy, pixmap); } + if (grab_verbose_p) + fprintf (stderr, "%s: grabbed %d bit screen image to %swindow.\n", + progname, xgwa.depth, + (root_p ? "real root " : "")); + if (grab_mouse_p) { XUngrabPointer (dpy, CurrentTime); @@ -328,42 +352,6 @@ grab_screen_image_1 (Screen *screen, Window window) XSync (dpy, True); } -void -grab_screen_image (Screen *screen, Window window) -{ -#ifdef HAVE_SGI_VIDEO - char c, *s = get_string_resource("grabVideoProbability", "Float"); - double prob = -1; - if (!s || - (1 != sscanf (s, " %lf %c", &prob, &c)) || - prob < 0 || - prob > 1) - prob = 0.5; - - if ((random() % 100) < ((int) (100 * prob))) - { - XWindowAttributes xgwa; - Display *dpy = DisplayOfScreen (screen); - XGetWindowAttributes (dpy, window, &xgwa); -# ifdef DEBUG - fprintf(stderr, "%s: trying to grab from video...\n", progname); -# endif /* DEBUG */ - if (grab_video_frame (screen, xgwa.visual, window)) - { - if (xgwa.depth < 24) - { - int class = visual_class (screen, xgwa.visual); - if (class == PseudoColor || class == DirectColor) - make_cubic_colormap (screen, window, xgwa.visual); - } - return; - } - } -#endif /* HAVE_SGI_VIDEO */ - - grab_screen_image_1 (screen, window); -} - /* When we are grabbing and manipulating a screen image, it's important that we use the same colormap it originally had. So, if the screensaver was @@ -417,11 +405,9 @@ copy_default_colormap_contents (Screen *screen, got_cells = max_cells; allocate_writable_colors (dpy, to_cmap, pixels, &got_cells); -#ifdef DEBUG - if (got_cells != max_cells) + if (grab_verbose_p && got_cells != max_cells) fprintf(stderr, "%s: got only %d of %d cells\n", progname, got_cells, max_cells); -#endif /* DEBUG */ if (got_cells <= 0) /* we're screwed */ ; @@ -446,9 +432,8 @@ copy_default_colormap_contents (Screen *screen, } -#ifdef DEBUG - fprintf(stderr, "%s: installing copy of default colormap\n", progname); -#endif /* DEBUG */ + if (grab_verbose_p) + fprintf(stderr, "%s: installing copy of default colormap\n", progname); free (old_colors); free (new_colors); @@ -480,7 +465,7 @@ read_display (Screen *screen, Window window, Pixmap into_pixmap, XGCValues gcv; int class; GC gc; - Bool install_p = False; + Bool remap_p = False; /* Check to see if the server supports the extension, and bug out if not. */ @@ -504,9 +489,8 @@ read_display (Screen *screen, Window window, Pixmap into_pixmap, if (xgwa.depth != 8 && xgwa.depth != 12) return False; else - /* Install a colormap that makes this visual behave like - a TrueColor visual of the same depth. */ - install_p = True; + /* Allocate a TrueColor-like spread of colors for the image. */ + remap_p = True; } @@ -561,10 +545,9 @@ read_display (Screen *screen, Window window, Pixmap into_pixmap, if (!image2) return False; -#ifdef DEBUG - fprintf(stderr, "%s: converting from depth %d to depth %d\n", - progname, image->depth, xgwa.depth); -#endif /* DEBUG */ + if (grab_verbose_p) + fprintf(stderr, "%s: converting from depth %d to depth %d\n", + progname, image->depth, xgwa.depth); for (y = 0; y < image->height; y++) for (x = 0; x < image->width; x++) @@ -594,6 +577,11 @@ read_display (Screen *screen, Window window, Pixmap into_pixmap, image = image2; } + if (remap_p) + { + allocate_cubic_colormap (screen, window, xgwa.visual); + remap_image (screen, window, xgwa.colormap, image); + } /* Now actually put the bits into the window or pixmap -- note the design bogosity of this extension, where we've been forced to take 24 bit data @@ -634,31 +622,32 @@ read_display (Screen *screen, Window window, Pixmap into_pixmap, } XDestroyImage(image); - if (install_p) - make_cubic_colormap (screen, window, xgwa.visual); - return True; } #endif /* HAVE_READ_DISPLAY_EXTENSION */ -#if defined(HAVE_READ_DISPLAY_EXTENSION) || defined(HAVE_SGI_VIDEO) +#ifdef HAVE_READ_DISPLAY_EXTENSION /* Makes and installs a colormap that makes a PseudoColor or DirectColor visual behave like a TrueColor visual of the same depth. */ static void -make_cubic_colormap (Screen *screen, Window window, Visual *visual) +allocate_cubic_colormap (Screen *screen, Window window, Visual *visual) { Display *dpy = DisplayOfScreen (screen); - Colormap cmap = XCreateColormap(dpy, window, visual, AllocAll); + XWindowAttributes xgwa; + Colormap cmap; int nr, ng, nb, cells; int r, g, b; int depth; XColor colors[4097]; int i; + XGetWindowAttributes (dpy, window, &xgwa); + cmap = xgwa.colormap; depth = visual_depth(screen, visual); + switch (depth) { case 8: nr = 3; ng = 3; nb = 2; cells = 256; break; @@ -667,18 +656,13 @@ make_cubic_colormap (Screen *screen, Window window, Visual *visual) } memset(colors, 0, sizeof(colors)); - for (i = 0; i < cells; i++) - { - colors[i].flags = DoRed|DoGreen|DoBlue; - colors[i].red = colors[i].green = colors[i].blue = 0; - } - for (r = 0; r < (1 << nr); r++) for (g = 0; g < (1 << ng); g++) for (b = 0; b < (1 << nb); b++) { i = (r | (g << nr) | (b << (nr + ng))); colors[i].pixel = i; + colors[i].flags = DoRed|DoGreen|DoBlue; if (depth == 8) { colors[i].red = ((r << 13) | (r << 10) | (r << 7) | @@ -697,27 +681,132 @@ make_cubic_colormap (Screen *screen, Window window, Visual *visual) } } -#ifdef DEBUG - fprintf(stderr, "%s: installing cubic colormap\n", progname); -#endif /* DEBUG */ - - XStoreColors (dpy, cmap, colors, cells); - XSetWindowColormap (dpy, window, cmap); - - /* Gag, install the colormap. - This is definitely right in the `if xscreensaver_window_p' case, since - it will never get installed otherwise. But, if we don't do it - unconditionally, then the new colormap won't get installed until the - window (re-)gains focus. It's generally very antisocial to install - the colormap of a non-OverrideRedirect window (that task belongs to - the WM) and if we were being kosher, we would only install this cmap - if the old cmap was already installed (or perhaps, if the window had - focus.) But, since this extension only exists on SGIs, and since SGIs - can handle four colormaps at once, let's go ahead and install it all - the time, so that even if the window pops up and has never had focus, - it will still display in the proper colors. - */ - XInstallColormap (dpy, cmap); + { + int j; + int allocated = 0; + int interleave = cells / 8; /* skip around, rather than allocating in + order, so that we get better coverage if + we can't allocated all of them. */ + for (j = 0; j < interleave; j++) + for (i = 0; i < cells; i += interleave) + if (XAllocColor (dpy, cmap, &colors[i + j])) + allocated++; + + if (grab_verbose_p) + fprintf (stderr, "%s: allocated %d of %d colors for cubic map\n", + progname, allocated, cells); + } +} + +static unsigned long +find_closest_pixel (XColor *colors, int ncolors, + unsigned long r, unsigned long g, unsigned long b) +{ + unsigned long distance = ~0; + int i, found = 0; + + if (ncolors == 0) + abort(); + for (i = 0; i < ncolors; i++) + { + unsigned long d; + int rd, gd, bd; + + rd = r - colors[i].red; + gd = g - colors[i].green; + bd = b - colors[i].blue; + if (rd < 0) rd = -rd; + if (gd < 0) gd = -gd; + if (bd < 0) bd = -bd; + d = (rd << 1) + (gd << 2) + bd; + + if (d < distance) + { + distance = d; + found = i; + if (distance == 0) + break; + } + } + + return found; } -#endif /* HAVE_READ_DISPLAY_EXTENSION || HAVE_SGI_VIDEO */ + +void +remap_image (Screen *screen, Window window, Colormap cmap, XImage *image) +{ + Display *dpy = DisplayOfScreen (screen); + unsigned long map[4097]; + int x, y, i; + int cells; + XColor colors[4097]; + + if (image->depth == 8) + cells = 256; + else if (image->depth == 12) + cells = 4096; + else + abort(); + + memset(map, -1, sizeof(*map)); + memset(colors, -1, sizeof(*colors)); + + for (i = 0; i < cells; i++) + colors[i].pixel = i; + XQueryColors (dpy, cmap, colors, cells); + + if (grab_verbose_p) + fprintf(stderr, "%s: building table for %d bit image\n", + progname, image->depth); + + for (i = 0; i < cells; i++) + { + unsigned short r, g, b; + + if (cells == 256) + { + /* "RRR GGG BB" In an 8 bit map. Convert that to + "RRR RRR RR" "GGG GGG GG" "BB BB BB BB" to give + an even spread. */ + r = (i & 0x07); + g = (i & 0x38) >> 3; + b = (i & 0xC0) >> 6; + + r = ((r << 13) | (r << 10) | (r << 7) | (r << 4) | (r << 1)); + g = ((g << 13) | (g << 10) | (g << 7) | (g << 4) | (g << 1)); + b = ((b << 14) | (b << 12) | (b << 10) | (b << 8) | + (b << 6) | (b << 4) | (b << 2) | b); + } + else + { + /* "RRRR GGGG BBBB" In a 12 bit map. Convert that to + "RRRR RRRR" "GGGG GGGG" "BBBB BBBB" to give an even + spread. */ + r = (i & 0x00F); + g = (i & 0x0F0) >> 4; + b = (i & 0xF00) >> 8; + + r = (r << 12) | (r << 8) | (r << 4) | r; + g = (g << 12) | (g << 8) | (g << 4) | g; + b = (b << 12) | (b << 8) | (b << 4) | b; + } + + map[i] = find_closest_pixel (colors, cells, r, g, b); + } + + if (grab_verbose_p) + fprintf(stderr, "%s: remapping colors in %d bit image\n", + progname, image->depth); + + for (y = 0; y < image->height; y++) + for (x = 0; x < image->width; x++) + { + unsigned long pixel = XGetPixel(image, x, y); + if (pixel >= cells) abort(); + XPutPixel(image, x, y, map[pixel]); + } +} + + +#endif /* HAVE_READ_DISPLAY_EXTENSION */