--- /dev/null
+/* xscreensaver, Copyright (c) 1992-2006 Jamie Zawinski <jwz@jwz.org>
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation. No representations are made about the suitability of this
+ * software for any purpose. It is provided "as is" without express or
+ * implied warranty.
+ */
+
+/* This is the OSX implementation of desktop-grabbing and image-loading.
+ */
+
+#import <stdlib.h>
+#import <Cocoa/Cocoa.h>
+#import "jwxyz.h"
+#import "grabscreen.h"
+#import "colorbars.h"
+#import "resources.h"
+#import "usleep.h"
+
+
+static void
+copy_framebuffer_to_ximage (CGDirectDisplayID cgdpy, XImage *xim,
+ int window_x, int window_y)
+{
+ unsigned char *data = (unsigned char *)
+ CGDisplayAddressForPosition (cgdpy, window_x, window_y);
+ int bpp = CGDisplayBitsPerPixel (cgdpy);
+ int spp = CGDisplaySamplesPerPixel (cgdpy);
+ int bps = CGDisplayBitsPerSample (cgdpy);
+ int bpr = CGDisplayBytesPerRow (cgdpy);
+
+ int y;
+ int ximw = xim->width;
+ int ximh = xim->height;
+
+ unsigned long *odata = (unsigned long *) xim->data;
+
+ switch (bpp) {
+ case 32:
+ if (spp != 3) abort();
+ if (bps != 8) abort();
+ int xwpl = xim->bytes_per_line/4;
+ for (y = 0; y < ximh; y++) {
+ // We can do this because the frame buffer and XImage are both ARGB 32.
+ // Both PPC and Intel use ARGB, viewed in word order (not byte-order).
+ memcpy (odata, data, ximw * 4);
+ odata += xwpl;
+ data += bpr;
+ }
+ break;
+
+ case 16:
+ if (spp != 3) abort();
+ if (bps != 5) abort();
+ for (y = 0; y < ximh; y++) {
+ unsigned short *ip = (unsigned short *) data;
+ int x;
+ for (x = 0; x < ximw; x++) {
+ unsigned short p = *ip++;
+ // This should be ok on both PPC and Intel (ARGB, word order)
+ unsigned char r = (p >> 10) & 0x1F;
+ unsigned char g = (p >> 5) & 0x1F;
+ unsigned char b = (p ) & 0x1F;
+ r = (r << 3) | (r >> 2);
+ g = (g << 3) | (g >> 2);
+ b = (b << 3) | (b >> 2);
+ unsigned long pixel = 0xFF000000 | (r << 16) | (g << 8) | b;
+ // XPutPixel (xim, x, y, pixel);
+ *odata++ = pixel;
+ }
+ data += bpr;
+ }
+ break;
+
+ case 8:
+ {
+ /* Get the current palette of the display. */
+ CGDirectPaletteRef pal = CGPaletteCreateWithDisplay (cgdpy);
+
+ /* Map it to 32bpp pixels */
+ unsigned long map[256];
+ for (y = 0; y < 256; y++) {
+ CGDeviceColor c = CGPaletteGetColorAtIndex (pal, y);
+ unsigned char r = c.red * 255.0;
+ unsigned char g = c.green * 255.0;
+ unsigned char b = c.blue * 255.0;
+ unsigned long pixel = 0xFF000000 | (r << 16) | (g << 8) | b;
+ map[y] = pixel;
+ }
+
+ for (y = 0; y < ximh; y++) {
+ unsigned char *ip = data;
+ int x;
+ for (x = 0; x < ximw; x++) {
+ *odata++ = map[*ip++];
+ }
+ data += bpr;
+ }
+ CGPaletteRelease (pal);
+ }
+ break;
+
+ default:
+ abort();
+ break;
+ }
+}
+
+
+/* Loads an image into the Drawable, returning once the image is loaded.
+ */
+void
+osx_grab_desktop_image (Screen *screen, Window xwindow, Drawable drawable)
+{
+ Display *dpy = DisplayOfScreen (screen);
+ XWindowAttributes xgwa;
+ NSView *nsview = jwxyz_window_view (xwindow);
+ NSWindow *nswindow = [nsview window];
+ int window_x, window_y;
+ Window unused;
+
+ // figure out where this window is on the screen
+ //
+ XGetWindowAttributes (dpy, xwindow, &xgwa);
+ XTranslateCoordinates (dpy, xwindow, RootWindowOfScreen (screen), 0, 0,
+ &window_x, &window_y, &unused);
+
+ // Use the size of the Drawable, not the Window.
+ {
+ Window r;
+ int x, y;
+ unsigned int w, h, bbw, d;
+ XGetGeometry (dpy, drawable, &r, &x, &y, &w, &h, &bbw, &d);
+ xgwa.width = w;
+ xgwa.height = h;
+ }
+
+ // Create a tmp ximage to hold the screen data.
+ //
+ XImage *xim = XCreateImage (dpy, xgwa.visual, 32, ZPixmap, 0, 0,
+ xgwa.width, xgwa.height, 8, 0);
+ xim->data = (char *) malloc (xim->height * xim->bytes_per_line);
+
+
+ // Find the address in the frame buffer of the top left of this window.
+ //
+ CGDirectDisplayID cgdpy = 0;
+ {
+ CGPoint p;
+ // #### this isn't quite right for screen 2: it's offset slightly.
+ p.x = window_x;
+ p.y = window_y;
+ CGDisplayCount n;
+ CGGetDisplaysWithPoint (p, 1, &cgdpy, &n);
+ if (!cgdpy) abort();
+ }
+
+ // Paint a transparent "hole" in this window.
+ //
+ BOOL oopaque = [nswindow isOpaque];
+ [nswindow setOpaque:NO];
+
+ [[NSColor clearColor] set];
+ NSRectFill ([nsview frame]);
+ [[nswindow graphicsContext] flushGraphics];
+
+
+ // Without this, we get a dozen black scanlines at the top.
+ // #### But with this, the screen saver loops, because calling this
+ // seems to implicitly mark the display as non-idle!
+ // CGDisplayCaptureWithOptions (cgdpy, kCGCaptureNoFill);
+
+ // #### So let's try waiting for the vertical blank instead...
+ // Nope, that doesn't work.
+ //
+ // CGDisplayWaitForBeamPositionOutsideLines (cgdpy, 0,
+ // window_y + [nswindow frame].size.height);
+
+ // #### Ok, try a busy-wait?
+ // Nope.
+ //
+
+ // #### Ok, just fuckin' sleep!
+ //
+ usleep (100000);
+
+
+ // Pull the bits out of the frame buffer.
+ //
+ copy_framebuffer_to_ximage (cgdpy, xim, window_x, window_y);
+
+ // CGDisplayRelease (cgdpy);
+
+ // Make the window visible again.
+ //
+ [nswindow setOpaque:oopaque];
+
+ // Splat the XImage onto the target drawable (probably the window)
+ // and free the bits.
+ //
+ GC gc = 0;
+ XPutImage (dpy, drawable, gc, xim, 0, 0, 0, 0, xim->width, xim->height);
+ XDestroyImage (xim);
+}
+
+
+/* Loads an image file and splats it onto the drawable.
+ The image is drawn as large as possible while preserving its aspect ratio.
+ If geom_ret is provided, the actual rectangle the rendered image takes
+ up will be returned there.
+ */
+Bool
+osx_load_image_file (Screen *screen, Window xwindow, Drawable drawable,
+ const char *filename, XRectangle *geom_ret)
+{
+ NSImage *img = [[NSImage alloc] initWithContentsOfFile:
+ [NSString stringWithCString:filename
+ encoding:NSUTF8StringEncoding]];
+ if (!img)
+ return False;
+
+ jwxyz_draw_NSImage (DisplayOfScreen (screen), drawable, img, geom_ret);
+ [img release];
+ return True;
+}
projects / xscreensaver / blobdiff