1 files changed, 130 insertions, 0 deletions
diff --git a/utils/colorbars.c b/utils/colorbars.c
new file mode 100644
index 0000000..3e2bc87
--- /dev/null
+++ b/utils/colorbars.c
@@ -0,0 +1,130 @@
+/* xscreensaver, Copyright (c) 2001-2018 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 file contains code for drawing NTSC colorbars.
+   A couple of things use this.
+ */
+
+#include "utils.h"
+#include "resources.h"
+#include "colorbars.h"
+#include "../hacks/ximage-loader.h"
+
+static const char * const colors[7][18] = {
+  { "#CCCCCC", "#FFFF00", "#00FFFF", "#00FF00",		/* tall bars */
+    "#FF00FF", "#FF0000", "#0000FF", "#000000",
+    0
+  }, {
+    "#000000", "#0000FF", "#FF0000", "#FF00FF",		/* short rev bars */
+    "#00FF00", "#00FFFF", "#FFFF00", "#CCCCCC",
+    0
+  }, {
+    "#000000", 0					/* blank */
+  }, {
+    "#FFFFFF", "#EEEEEE", "#DDDDDD", "#CCCCCC",		/* gray ramp */
+    "#BBBBBB", "#AAAAAA", "#999999", "#888888",
+    "#777777", "#666666", "#555555", "#444444",
+    "#333333", "#222222", "#111111", "#000000"
+  }, {
+    "#000000", "#111111", "#222222", "#333333",		/* gray rev ramp */
+    "#444444", "#555555", "#666666", "#777777",
+    "#888888", "#999999", "#AAAAAA", "#BBBBBB",
+    "#CCCCCC", "#DDDDDD", "#EEEEEE", "#FFFFFF"
+  }, {
+    "#000000", 0					/* blank */
+  }, {
+    "#FF00FF", "#FF00FF", "#FF00FF",			/* blacklevel row */
+    "#FFFFFF", "#FFFFFF", "#FFFFFF",
+    "#0000AD", "#0000AD", "#0000AD",
+    "#131313", "#131313", "#131313",
+    "#000000", "#000000", "#262626",
+    "#000000", "#000000", "#000000"
+  }
+};
+
+static const int heights[7] = { 63, 10, 1, 5, 5, 1, 15 };   /* percentages */
+
+
+void
+draw_colorbars (Screen *screen, Visual *visual,
+                Drawable drawable, Colormap cmap,
+                int x, int y, int width, int height,
+                Pixmap logo, Pixmap logo_mask)
+{
+  Display *dpy = DisplayOfScreen (screen);
+  int ypct = 0;
+  int j;
+  XGCValues gcv;
+  GC gc = XCreateGC (dpy, drawable, 0, &gcv);
+
+  if (width <= 0 || height <= 0)
+    {
+      Window root;
+      int xx, yy;
+      unsigned int bw, d;
+      XGetGeometry (dpy, drawable,
+                    &root, &xx, &yy,
+                    (unsigned int *) &width,
+                    (unsigned int *) &height,
+                    &bw, &d);
+    }
+
+  for (j = 0; j < sizeof(colors) / sizeof(*colors); j++)
+    {
+      int i, h, ncols;
+      int x1 = 0;
+      int y2;
+      for (ncols = 0; ncols < sizeof(*colors) / sizeof(**colors); ncols++)
+        if (!colors[j][ncols]) break;
+      ypct += heights[j];
+      y2 = height * ypct / 100;
+      h = y2 - y; /* avoid roundoff fencepost */
+      for (i = 0; i < ncols; i++)
+        {
+          XColor xcolor;
+          const char *color = colors[j][i];
+          int x2 = x + (width * (i+1) / ncols);
+          int w = x2 - x1; /* avoid roundoff fencepost */
+          if (! XParseColor (dpy, cmap, color, &xcolor))
+            abort();
+          xcolor.flags = DoRed|DoGreen|DoBlue;
+          if (!XAllocColor (dpy, cmap, &xcolor))
+            continue;
+          XSetForeground (dpy, gc, xcolor.pixel);
+          XFillRectangle (dpy, drawable, gc, x1, y, w, h);
+          x1 = x2;
+	}
+      y = y2;
+    }
+
+  /* Add in the xscreensaver logo */
+  if (logo)
+    {
+      Window r;
+      int x, y;
+      unsigned int logo_width, logo_height, bw, d;
+      int x1, y1, w, h;
+      XGetGeometry (dpy, logo, &r, &x, &y, &logo_width, &logo_height, &bw, &d);
+      w = width;
+      h = height * heights[0] / 100;
+      x1 = x + (w - (int) logo_width) / 2;
+      y1 = y + (h - (int) logo_height) / 2;
+      if (logo_mask)
+        {
+          XSetClipMask (dpy, gc, logo_mask);
+          XSetClipOrigin (dpy, gc, x1, y1);
+        }
+      XCopyArea (dpy, logo, drawable, gc, 0, 0,
+                 logo_width, logo_height, x1, y1);
+    }
+
+  XFreeGC(dpy, gc);
+}