--- rxvt-unicode/src/rxvtimg.h	2012/06/08 22:19:03	1.26
+++ rxvt-unicode/src/rxvtimg.h	2013/10/01 13:30:04	1.49
@@ -1,23 +1,39 @@
+/*----------------------------------------------------------------------*
+ * File:	rxvtimg.h
+ *----------------------------------------------------------------------*
+ *
+ * All portions of code are copyright by their respective author/s.
+ * Copyright (c) 2012      Marc Lehmann <schmorp@schmorp.de>
+ * Copyright (c) 2012      Emanuele Giaquinta <e.giaquinta@glauco.it>
+ *
+ * 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
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *---------------------------------------------------------------------*/
+
 #ifndef IMG_H
 #define IMG_H
 
-#if HAVE_BG_PIXMAP && BG_IMAGE_FROM_FILE && ENABLE_TRANSPARENCY && HAVE_PIXBUF
-  #define HAVE_IMG 1
-#endif
-
 #if HAVE_IMG
 
-#define float_to_component(d) (uint16_t)((d) * 65535.99)
+#define float_to_component(d) (int32_t)((d) * 65535.99)
 
 #include <X11/extensions/Xrender.h>
 
-class rxvt_img
+struct rxvt_img
 {
-  void alloc ();
-  void destroy ();
-  Picture src_picture ();
+  typedef double nv;
 
-public:
   // *could* also hold the Pixmap itself
   struct pixref
   {
@@ -39,9 +55,12 @@
 
   rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int x, int y, int width, int height, int repeat = RepeatNormal);
   rxvt_img (const rxvt_img &img);
+  void alloc ();
 
+# if HAVE_PIXBUF
   static rxvt_img *new_from_pixbuf (rxvt_screen *s, GdkPixbuf *pb); // from pixbuf
   static rxvt_img *new_from_file (rxvt_screen *s, const char *filename); // via pixbuf
+# endif
   static rxvt_img *new_from_root (rxvt_screen *s); // get root pixmap
 
   ~rxvt_img ();
@@ -55,8 +74,8 @@
   // inplace
   void move (int dx, int dy)
   {
-    x -= dx;
-    y -= dy;
+    x += dx;
+    y += dy;
   }
 
   void repeat_mode (int repeat)
@@ -65,14 +84,17 @@
   }
 
   void unshare (); // prepare for write
-  void fill (const rxvt_color &c);
+  void fill (const rgba &c);
+  void fill (const rgba &c, int x, int y, int w, int h);
+  void add_alpha ();
   //void linear_gradient  (const XLinearGradient  *gradient, const XFixed *stops, const XRenderColor *colors, int nstops);
   //void radial_gradient  (const XRadialGradient  *gradient, const XFixed *stops, const XRenderColor *colors, int nstops);
   //void conical_gradient (const XConicalGradient *gradient, const XFixed *stops, const XRenderColor *colors, int nstops);
-  void brightness (uint16_t r, uint16_t g, uint16_t b, uint16_t a);
-  void contrast (uint16_t r, uint16_t g, uint16_t b, uint16_t a);
 
-  void brightness (double r, double g, double b, double a = 1.)
+  void brightness (int32_t r, int32_t g, int32_t b, int32_t a);
+  void contrast (int32_t r, int32_t g, int32_t b, int32_t a);
+
+  void brightness (nv r, nv g, nv b, nv a = 1.)
   {
     brightness (float_to_component (r),
                 float_to_component (g),
@@ -80,7 +102,7 @@
                 float_to_component (a));
   }
 
-  void contrast (double r, double g, double b, double a = 1.)
+  void contrast (nv r, nv g, nv b, nv a = 1.)
   {
     contrast (float_to_component (r),
               float_to_component (g),
@@ -88,16 +110,39 @@
               float_to_component (a));
   }
 
+  void draw (rxvt_img *img, int op = PictOpOver, nv mask = 1.);
+#if 0
+  void draw (rxvt_img *img, int op = PictOpOver, nv mask = 1.,
+             nv px, nv py, nv qx, nv qy, nv rx, nv ry, nv sx, nv sy);
+#endif
+
   // copy
   rxvt_img *reify (); // make x, y 0, make real width/height
   rxvt_img *blur (int rh, int rv);
   rxvt_img *clone ();
   rxvt_img *sub_rect (int x, int y, int width, int height);
-  rxvt_img *transform (int new_width, int new_height, double matrix[9]);
+  rxvt_img *transform (const nv matrix[3][3]);
   rxvt_img *scale (int new_width, int new_height);
-  rxvt_img *rotate (int new_width, int new_height, int x, int y, double phi);
-  rxvt_img *convert_format (XRenderPictFormat *format, const rxvt_color &bg);
-  rxvt_img *blend (rxvt_img *img, double factor);
+  rxvt_img *rotate (int cx, int cy, nv phi);
+  rxvt_img *convert_format (XRenderPictFormat *format, const rgba &bg);
+  rxvt_img *tint (const rgba &c);
+  rxvt_img *shade (nv factor, rgba c = rgba (rgba::MAX_CC, rgba::MAX_CC, rgba::MAX_CC));
+  rxvt_img *filter (const char *name, int nparams = 0, nv *params = 0);
+  rxvt_img *muladd (nv mul, nv add); // general multiply and add, implemented as the biggest hack ever :/
+
+  // egregious helper category
+  rxvt_img *replace (rxvt_img *&p)
+  {
+    delete p;
+    p = this;
+    return this;
+  }
+
+  /* these are considered private */
+  void destroy ();
+  rxvt_img *new_empty ();
+  Picture picture ();
+  rxvt_img *transform (const nv *matrix);
 };
 
 #endif