--- rxvt-unicode/src/rxvtimg.C	2012/07/14 08:27:55	1.104
+++ rxvt-unicode/src/rxvtimg.C	2019/09/17 18:31:32	1.112
@@ -8,7 +8,7 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation; either version 3 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
@@ -166,7 +166,7 @@
       else if (!this->dstimg->pm) // somewhat unsatisfying
         this->dstimg->alloc ();
 
-      dpy =       srcimg->s->dpy;
+      dpy =       srcimg->d->dpy;
       src =       srcimg->picture ();
       dst = this->dstimg->picture ();
     }
@@ -190,11 +190,12 @@
     // CreateSolidFill creates a very very very weird picture
     void mask (const rgba &c)
     {
+      // the casts are needed in C++11 (see 8.5.1)
       XRenderColor rc = {
-        c.r * c.a / 65535,
-        c.g * c.a / 65535,
-        c.b * c.a / 65535,
-              c.a
+        (unsigned short)(c.r * c.a / 65535),
+        (unsigned short)(c.g * c.a / 65535),
+        (unsigned short)(c.b * c.a / 65535),
+        c.a
       };
       msk = XRenderCreateSolidFill (dpy, &rc);
       ecb_assume (msk);
@@ -203,10 +204,10 @@
     void fill (const rgba &c)
     {
       XRenderColor rc = {
-        c.r * c.a / 65535,
-        c.g * c.a / 65535,
-        c.b * c.a / 65535,
-              c.a
+        (unsigned short)(c.r * c.a / 65535),
+        (unsigned short)(c.g * c.a / 65535),
+        (unsigned short)(c.b * c.a / 65535),
+        c.a
       };
 
       XRenderFillRectangle (dpy, PictOpSrc, msk, &rc, 0, 0, 1, 1);
@@ -248,13 +249,19 @@
 }
 
 rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int x, int y, int width, int height, int repeat)
-: s(screen), x(x), y(y), w(width), h(height), format(format), repeat(repeat),
+: d(screen->display), x(x), y(y), w(width), h(height), format(format), repeat(repeat),
+  pm(0), ref(0)
+{
+}
+
+rxvt_img::rxvt_img (rxvt_display *display, XRenderPictFormat *format, int x, int y, int width, int height, int repeat)
+: d(display), x(x), y(y), w(width), h(height), format(format), repeat(repeat),
   pm(0), ref(0)
 {
 }
 
 rxvt_img::rxvt_img (const rxvt_img &img)
-: s(img.s), x(img.x), y(img.y), w(img.w), h(img.h), format(img.format), repeat(img.repeat), pm(img.pm), ref(img.ref)
+: d(img.d), x(img.x), y(img.y), w(img.w), h(img.h), format(img.format), repeat(img.repeat), pm(img.pm), ref(img.ref)
 {
   ++ref->cnt;
 }
@@ -397,7 +404,15 @@
   GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
 
   if (!pb)
-    rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
+    try
+      {
+        rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
+      }
+    catch (...)
+      {
+        g_error_free (err);
+        throw;
+      }
 
   rxvt_img *img = new_from_pixbuf (s, pb);
 
@@ -415,7 +430,7 @@
     return;
 
   if (pm && ref->ours)
-    XFreePixmap (s->dpy, pm);
+    XFreePixmap (d->dpy, pm);
 
   delete ref;
 }
@@ -428,14 +443,14 @@
 void
 rxvt_img::alloc ()
 {
-  pm = XCreatePixmap (s->dpy, s->display->root, w, h, format->depth);
+  pm = XCreatePixmap (d->dpy, d->root, w, h, format->depth);
   ref = new pixref (w, h);
 }
 
 rxvt_img *
 rxvt_img::new_empty ()
 {
-  rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
+  rxvt_img *img = new rxvt_img (d, format, x, y, w, h, repeat);
   img->alloc ();
 
   return img;
@@ -444,7 +459,7 @@
 Picture
 rxvt_img::picture ()
 {
-  Display *dpy = s->dpy;
+  Display *dpy = d->dpy;
 
   XRenderPictureAttributes pa;
   pa.repeat = repeat;
@@ -459,10 +474,10 @@
   if (ref->cnt == 1 && ref->ours)
     return;
 
-  Pixmap pm2 = XCreatePixmap (s->dpy, s->display->root, ref->w, ref->h, format->depth);
-  GC gc = XCreateGC (s->dpy, pm, 0, 0);
-  XCopyArea (s->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
-  XFreeGC (s->dpy, gc);
+  Pixmap pm2 = XCreatePixmap (d->dpy, d->root, ref->w, ref->h, format->depth);
+  GC gc = XCreateGC (d->dpy, pm, 0, 0);
+  XCopyArea (d->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
+  XFreeGC (d->dpy, gc);
 
   destroy ();
 
@@ -475,7 +490,7 @@
 {
   XRenderColor rc = { c.r, c.g, c.b, c.a };
 
-  Display *dpy = s->dpy;
+  Display *dpy = d->dpy;
   Picture src = picture ();
   XRenderFillRectangle (dpy, PictOpSrc, src, &rc, x, y, w, h);
   XRenderFreePicture (dpy, src);
@@ -493,7 +508,7 @@
   if (format->direct.alphaMask)
     return;
 
-  composer cc (this, new rxvt_img (s, find_alpha_format_for (s->dpy, format), x, y, w, h, repeat));
+  composer cc (this, new rxvt_img (d, find_alpha_format_for (d->dpy, format), x, y, w, h, repeat));
   
   XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
 
@@ -529,13 +544,13 @@
 rxvt_img *
 rxvt_img::blur (int rh, int rv)
 {
-  if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
+  if (!(d->flags & DISPLAY_HAS_RENDER_CONV))
     return clone ();
 
-  Display *dpy = s->dpy;
+  Display *dpy = d->dpy;
   int size = max (rh, rv) * 2 + 1;
   nv *kernel = (nv *)malloc (size * sizeof (nv));
-  XFixed *params = (XFixed *)malloc ((size + 2) * sizeof (XFixed));
+  XFixed *params = rxvt_temp_buf<XFixed> (size + 2);
   rxvt_img *img = new_empty ();
 
   XRenderPictureAttributes pa;
@@ -580,7 +595,6 @@
     }
 
   free (kernel);
-  free (params);
 
   XRenderFreePicture (dpy, src);
   XRenderFreePicture (dpy, dst);
@@ -594,7 +608,7 @@
 {
   // STEP 1: double the image width, fill all odd columns with white (==1)
 
-  composer cc (this, new rxvt_img (s, format, 0, 0, w * 2, h, repeat));
+  composer cc (this, new rxvt_img (d, format, 0, 0, w * 2, h, repeat));
 
   // why the hell does XRenderSetPictureTransform want a writable matrix :(
   // that keeps us from just static const'ing this matrix.
@@ -671,7 +685,7 @@
 {
   unshare ();
 
-  Display *dpy = s->dpy;
+  Display *dpy = d->dpy;
   Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
 
   // loop should not be needed for brightness, as only -1..1 makes sense
@@ -765,7 +779,7 @@
                && (x || y)               // we need one because of non-zero offset
                && repeat == RepeatNone;  // and we have no good pixels to fill with
 
-  composer cc (this, new rxvt_img (s, alpha ? find_alpha_format_for (s->dpy, format) : format,
+  composer cc (this, new rxvt_img (d, alpha ? find_alpha_format_for (d->dpy, format) : format,
                                    0, 0, w, h, repeat));
 
   if (repeat == RepeatNone)
@@ -837,7 +851,7 @@
 
   mat3x3 inv = (mat3x3::translate (-x, -y) * m * mat3x3::translate (x, y)).inverse ();
 
-  composer cc (this, new rxvt_img (s, format, nx, ny, new_width, new_height, repeat));
+  composer cc (this, new rxvt_img (d, format, nx, ny, new_width, new_height, repeat));
 
   XTransform xfrm;
 
@@ -886,7 +900,7 @@
   if (new_format == format)
     return clone ();
 
-  composer cc (this, new rxvt_img (s, new_format, x, y, w, h, repeat));
+  composer cc (this, new rxvt_img (d, new_format, x, y, w, h, repeat));
 
   int op = PictOpSrc;
 
@@ -917,6 +931,40 @@
 }
 
 rxvt_img *
+rxvt_img::shade (nv factor, rgba c)
+{
+  clamp_it (factor, -1., 1.);
+  factor++;
+
+  if (factor > 1)
+    {
+      c.r = c.r * (2 - factor);
+      c.g = c.g * (2 - factor);
+      c.b = c.b * (2 - factor);
+    }
+  else
+    {
+      c.r = c.r * factor;
+      c.g = c.g * factor;
+      c.b = c.b * factor;
+    }
+
+  rxvt_img *img = this->tint (c);
+
+  if (factor > 1)
+    {
+      c.a = 0xffff;
+      c.r =
+      c.g =
+      c.b = 0xffff * (factor - 1);
+
+      img->brightness (c.r, c.g, c.b, c.a);
+    }
+
+  return img;
+}
+
+rxvt_img *
 rxvt_img::filter (const char *name, int nparams, nv *params)
 {
   composer cc (this);