rxvt-unicode/src/rxvtimg.h

/*----------------------------------------------------------------------*
 * 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 3 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_IMG

#define float_to_component(d) (int32_t)((d) * 65535.99)

#include <X11/extensions/Xrender.h>

struct rxvt_img
{
  typedef double nv;

  // *could* also hold the Pixmap itself
  struct pixref
  {
    int cnt;
    int w, h;
    bool ours; // false if we don't own the pixmap at all

    pixref (int w, int h)
    : cnt(1), w(w), h(h), ours(true)
    {
    }
  };

  rxvt_display *d;
  Pixmap pm;
  pixref *ref; // shared refcnt
  int x, y, w, h, repeat;
  XRenderPictFormat *format;

  rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int x, int y, int width, int height, int repeat = RepeatNormal);
  rxvt_img (rxvt_display *display, 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 ();

  Pixmap steal ()
  {
    ref->ours = false;
    return pm;
  }

  // inplace
  void move (int dx, int dy)
  {
    x += dx;
    y += dy;
  }

  void repeat_mode (int repeat)
  {
    this->repeat = repeat;
  }

  void unshare (); // prepare for write
  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 (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),
                float_to_component (b),
                float_to_component (a));
  }

  void contrast (nv r, nv g, nv b, nv a = 1.)
  {
    contrast (float_to_component (r),
              float_to_component (g),
              float_to_component (b),
              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 (const nv matrix[3][3]);
  rxvt_img *scale (int new_width, int new_height);
  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

#endif

Revision:	1.51
Committed:	Sat Jul 15 08:16:31 2017 UTC (6 years, 10 months ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rxvt-unicode-rel-9_29, rxvt-unicode-rel-9_26, rxvt-unicode-rel-9_25, rxvt-unicode-rel-9_30, HEAD
Changes since 1.50:	+2 -1 lines
Log Message:	Fix urxvtd crash when using a background expression. A rxvt_img object contains a pointer to the associated rxvt_screen, which in practice corresponds to the terminal object that created the image. This causes a use-after-free when there are two or more terminal objects sharing a rxvt_img and the one that created it is destroyed. This patch fixes the issue by replacing the rxvt_screen pointer with a pointer to the associated rxvt_display.
#	User	Rev	Content
1	root	1.41	/----------------------------------------------------------------------
2	sf-exg	1.42	* File: rxvtimg.h
3	root	1.41	----------------------------------------------------------------------
4			*
5			* All portions of code are copyright by their respective author/s.
6			* Copyright (c) 2012 Marc Lehmann <schmorp@schmorp.de>
7			* Copyright (c) 2012 Emanuele Giaquinta <e.giaquinta@glauco.it>
8			*
9			* This program is free software; you can redistribute it and/or modify
10			* it under the terms of the GNU General Public License as published by
11	root	1.50	* the Free Software Foundation; either version 3 of the License, or
12	root	1.41	* (at your option) any later version.
13			*
14			* This program is distributed in the hope that it will be useful,
15			* but WITHOUT ANY WARRANTY; without even the implied warranty of
16			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17			* GNU General Public License for more details.
18			*
19			* You should have received a copy of the GNU General Public License
20			* along with this program; if not, write to the Free Software
21			* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22			---------------------------------------------------------------------/
23
24			#ifndef IMG_H
25	root	1.1	#define IMG_H
26
27			#if HAVE_IMG
28
29	root	1.28	#define float_to_component(d) (int32_t)((d) * 65535.99)
30	sf-exg	1.16
31	root	1.1	#include <X11/extensions/Xrender.h>
32
33	root	1.39	struct rxvt_img
34	root	1.1	{
35	root	1.36	typedef double nv;
36
37	root	1.19	// could also hold the Pixmap itself
38			struct pixref
39			{
40			int cnt;
41			int w, h;
42			bool ours; // false if we don't own the pixmap at all
43
44			pixref (int w, int h)
45			: cnt(1), w(w), h(h), ours(true)
46			{
47			}
48			};
49
50	sf-exg	1.51	rxvt_display *d;
51	root	1.1	Pixmap pm;
52	root	1.19	pixref *ref; // shared refcnt
53	root	1.15	int x, y, w, h, repeat;
54	root	1.1	XRenderPictFormat *format;
55
56	root	1.21	rxvt_img (rxvt_screen screen, XRenderPictFormat format, int x, int y, int width, int height, int repeat = RepeatNormal);
57	sf-exg	1.51	rxvt_img (rxvt_display display, XRenderPictFormat format, int x, int y, int width, int height, int repeat = RepeatNormal);
58	root	1.17	rxvt_img (const rxvt_img &img);
59	root	1.30	void alloc ();
60	root	1.17
61	sf-exg	1.29	# if HAVE_PIXBUF
62	root	1.23	static rxvt_img new_from_pixbuf (rxvt_screen s, GdkPixbuf *pb); // from pixbuf
63			static rxvt_img new_from_file (rxvt_screen s, const char *filename); // via pixbuf
64	sf-exg	1.29	# endif
65	root	1.5	static rxvt_img new_from_root (rxvt_screen s); // get root pixmap
66	root	1.4
67	root	1.1	~rxvt_img ();
68
69			Pixmap steal ()
70			{
71	root	1.19	ref->ours = false;
72			return pm;
73	root	1.1	}
74
75			// inplace
76	root	1.15	void move (int dx, int dy)
77			{
78	root	1.38	x += dx;
79			y += dy;
80	root	1.15	}
81
82			void repeat_mode (int repeat)
83			{
84			this->repeat = repeat;
85			}
86
87	root	1.17	void unshare (); // prepare for write
88	root	1.33	void fill (const rgba &c);
89	root	1.44	void fill (const rgba &c, int x, int y, int w, int h);
90	root	1.34	void add_alpha ();
91	root	1.26	//void linear_gradient (const XLinearGradient gradient, const XFixed stops, const XRenderColor *colors, int nstops);
92			//void radial_gradient (const XRadialGradient gradient, const XFixed stops, const XRenderColor *colors, int nstops);
93			//void conical_gradient (const XConicalGradient gradient, const XFixed stops, const XRenderColor *colors, int nstops);
94	root	1.45
95	root	1.28	void brightness (int32_t r, int32_t g, int32_t b, int32_t a);
96			void contrast (int32_t r, int32_t g, int32_t b, int32_t a);
97	sf-exg	1.16
98	root	1.36	void brightness (nv r, nv g, nv b, nv a = 1.)
99	sf-exg	1.16	{
100			brightness (float_to_component (r),
101			float_to_component (g),
102			float_to_component (b),
103			float_to_component (a));
104			}
105
106	root	1.36	void contrast (nv r, nv g, nv b, nv a = 1.)
107	sf-exg	1.16	{
108			contrast (float_to_component (r),
109			float_to_component (g),
110			float_to_component (b),
111			float_to_component (a));
112			}
113
114	root	1.38	void draw (rxvt_img *img, int op = PictOpOver, nv mask = 1.);
115	root	1.40	#if 0
116			void draw (rxvt_img *img, int op = PictOpOver, nv mask = 1.,
117			nv px, nv py, nv qx, nv qy, nv rx, nv ry, nv sx, nv sy);
118			#endif
119	root	1.37
120	root	1.1	// copy
121	root	1.18	rxvt_img *reify (); // make x, y 0, make real width/height
122	sf-exg	1.12	rxvt_img *blur (int rh, int rv);
123	root	1.8	rxvt_img *clone ();
124	root	1.15	rxvt_img *sub_rect (int x, int y, int width, int height);
125	root	1.39	rxvt_img *transform (const nv matrix[3][3]);
126	root	1.1	rxvt_img *scale (int new_width, int new_height);
127	root	1.36	rxvt_img *rotate (int cx, int cy, nv phi);
128	root	1.33	rxvt_img convert_format (XRenderPictFormat format, const rgba &bg);
129	root	1.43	rxvt_img *tint (const rgba &c);
130	sf-exg	1.48	rxvt_img *shade (nv factor, rgba c = rgba (rgba::MAX_CC, rgba::MAX_CC, rgba::MAX_CC));
131	root	1.43	rxvt_img filter (const char name, int nparams = 0, nv *params = 0);
132	root	1.46	rxvt_img *muladd (nv mul, nv add); // general multiply and add, implemented as the biggest hack ever :/
133	root	1.27
134	sf-exg	1.47	// egregious helper category
135	root	1.27	rxvt_img replace (rxvt_img &p)
136			{
137			delete p;
138			p = this;
139			return this;
140			}
141	root	1.39
142	root	1.43	/* these are considered private */
143	root	1.39	void destroy ();
144	root	1.43	rxvt_img *new_empty ();
145	root	1.39	Picture picture ();
146			rxvt_img transform (const nv matrix);
147	root	1.1	};
148
149			#endif
150
151			#endif
152