rxvt-unicode/src/background.C

/*----------------------------------------------------------------------*
 * File:        background.C - former xpm.C
 *----------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 2005-2008 Marc Lehmann <schmorp@schmorp.de>
 * Copyright (c) 2007      Sasha Vasko <sasha@aftercode.net>
 * Copyright (c) 2010-2012 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.
 *---------------------------------------------------------------------*/

#include "../config.h"          /* NECESSARY */
#include "rxvt.h"               /* NECESSARY */

#ifdef HAVE_BG_PIXMAP

void
rxvt_term::bg_destroy ()
{
# if ENABLE_TRANSPARENCY
  delete root_img;
  root_img = 0;
# endif

# if BG_IMAGE_FROM_FILE
  fimage.destroy ();
# endif

  delete bg_img;
  bg_img = 0;
}

bool
rxvt_term::bg_set_position (int x, int y)
{

  if (target_x != x
      || target_y != y)
    {
      target_x = x;
      target_y = y;
      return true;
    }
  return false;
}

bool
rxvt_term::bg_window_size_sensitive ()
{
# if ENABLE_TRANSPARENCY
  if (bg_flags & BG_IS_TRANSPARENT)
    return true;
# endif

# if BG_IMAGE_FROM_FILE
  if (fimage.img)
    {
      if ((fimage.flags & IM_IS_SIZE_SENSITIVE)
          || fimage.img->w > szHint.width
          || fimage.img->h > szHint.height)
        return true;
    }
# endif

  return false;
}

bool
rxvt_term::bg_window_position_sensitive ()
{
# if ENABLE_TRANSPARENCY
  if (bg_flags & BG_IS_TRANSPARENT)
    return true;
# endif

# if BG_IMAGE_FROM_FILE
  if (fimage.img)
    {
      if (fimage.flags & IM_ROOT_ALIGN)
        return true;
    }
# endif

  return false;
}

# if BG_IMAGE_FROM_FILE
static inline int
make_align_position (int align, int window_size, int image_size)
{
  if (align >= 0 && align <= 100)
    return lerp (0, window_size - image_size, align);
  else if (align > 100)
    return lerp (window_size - image_size, window_size, align - 100);
  else
    return lerp (-image_size, 0, align + 100);
}

static void
parse_style (const char *style, int &x, int &y, unsigned int &w, unsigned int &h, uint8_t &flags)
{
  if (!strcasecmp (style, "tiled"))
    {
      flags = IM_TILE;
      w = h = noScale;
      x = y = 0;
    }
  else if (!strcasecmp (style, "aspect-stretched"))
    {
      flags = IM_KEEP_ASPECT;
      w = h = windowScale;
      x = y = centerAlign;
    }
  else if (!strcasecmp (style, "stretched"))
    {
      flags = 0;
      w = h = windowScale;
      x = y = centerAlign;
    }
  else if (!strcasecmp (style, "centered"))
    {
      flags = 0;
      w = h = noScale;
      x = y = centerAlign;
    }
  else if (!strcasecmp (style, "root-tiled"))
    {
      flags = IM_TILE|IM_ROOT_ALIGN;
      w = h = noScale;
      x = y = 0;
    }
}

bool
rxvt_image::set_geometry (const char *geom, bool update)
{
  bool changed = false;
  int geom_flags = 0;
  int x = h_align;
  int y = v_align;
  unsigned int w = h_scale;
  unsigned int h = v_scale;
  uint8_t new_flags = 0;

  if (geom == NULL)
    return false;

  if (geom[0])
    {
      char **arr = rxvt_strsplit (':', geom);

      for (int i = 0; arr[i]; i++)
        {
          if (!strncasecmp (arr[i], "style=", 6))
            {
              parse_style (arr[i] + 6, x, y, w, h, new_flags);
              geom_flags = WidthValue|HeightValue|XValue|YValue;
            }
          else if (!strcasecmp (arr[i], "op=tile"))
            new_flags |= IM_TILE;
          else if (!strcasecmp (arr[i], "op=keep-aspect"))
            new_flags |= IM_KEEP_ASPECT;
          else if (!strcasecmp (arr[i], "op=root-align"))
            new_flags |= IM_ROOT_ALIGN;

          // deprecated
          else if (!strcasecmp (arr[i], "tile"))
            {
              new_flags |= IM_TILE;
              w = h = noScale;
              geom_flags |= WidthValue|HeightValue;
            }
          else if (!strcasecmp (arr[i], "propscale"))
            {
              new_flags |= IM_KEEP_ASPECT;
              w = h = windowScale;
              geom_flags |= WidthValue|HeightValue;
            }
          else if (!strcasecmp (arr[i], "hscale"))
            {
              new_flags |= IM_TILE;
              w = windowScale;
              h = noScale;
              geom_flags |= WidthValue|HeightValue;
            }
          else if (!strcasecmp (arr[i], "vscale"))
            {
              new_flags |= IM_TILE;
              h = windowScale;
              w = noScale;
              geom_flags |= WidthValue|HeightValue;
            }
          else if (!strcasecmp (arr[i], "scale"))
            {
              w = h = windowScale;
              geom_flags |= WidthValue|HeightValue;
            }
          else if (!strcasecmp (arr[i], "auto"))
            {
              w = h = windowScale;
              x = y = centerAlign;
              geom_flags |= WidthValue|HeightValue|XValue|YValue;
            }
          else if (!strcasecmp (arr[i], "root"))
            {
              new_flags |= IM_TILE|IM_ROOT_ALIGN;
              w = h = noScale;
              geom_flags |= WidthValue|HeightValue;
            }

          else
            geom_flags |= XParseGeometry (arr[i], &x, &y, &w, &h);
        } /* done parsing ops */

      rxvt_free_strsplit (arr);
    }

  new_flags |= flags & ~IM_GEOMETRY_FLAGS;

  if (!update)
    {
      if (!(geom_flags & XValue))
        x = y = defaultAlign;
      else if (!(geom_flags & YValue))
        y = x;

      if (!(geom_flags & (WidthValue|HeightValue)))
        w = h = defaultScale;
      else if (!(geom_flags & HeightValue))
        h = w;
      else if (!(geom_flags & WidthValue))
        w = h;
    }

  clamp_it (x, -100, 200);
  clamp_it (y, -100, 200);

  if (flags != new_flags
      || h_scale != w
      || v_scale != h
      || h_align != x
      || v_align != y)
    {
      flags = new_flags;
      h_scale = w;
      v_scale = h;
      h_align = x;
      v_align = y;
      changed = true;
    }

  if (is_size_sensitive ())
    flags |= IM_IS_SIZE_SENSITIVE;
  else
    flags &= ~IM_IS_SIZE_SENSITIVE;

  return changed;
}

void
rxvt_term::get_image_geometry (rxvt_image &image, int &w, int &h, int &x, int &y)
{
  int image_width = image.img->w;
  int image_height = image.img->h;
  int target_width = szHint.width;
  int target_height = szHint.height;
  int h_scale = min (image.h_scale, 32767 * 100 / target_width);
  int v_scale = min (image.v_scale, 32767 * 100 / target_height);

  w = h_scale * target_width / 100;
  h = v_scale * target_height / 100;

  if (image.flags & IM_KEEP_ASPECT)
    {
      float scale = (float)w / image_width;
      min_it (scale, (float)h / image_height);
      w = image_width * scale + 0.5;
      h = image_height * scale + 0.5;
    }

  if (!w) w = image_width;
  if (!h) h = image_height;

  if (image.flags & IM_ROOT_ALIGN)
    {
      x = -target_x;
      y = -target_y;
    }
  else
    {
      x = make_align_position (image.h_align, target_width, w);
      y = make_align_position (image.v_align, target_height, h);
    }
}

bool
rxvt_term::render_image (rxvt_image &image)
{
  int target_width    = szHint.width;
  int target_height   = szHint.height;

  int x = 0;
  int y = 0;
  int w = 0;
  int h = 0;

  get_image_geometry (image, w, h, x, y);

  if (!(image.flags & IM_ROOT_ALIGN)
      && (x >= target_width
          || y >= target_height
          || x + w <= 0
          || y + h <= 0))
    return false;

  rxvt_img *img = image.img->scale (w, h);

  if (image.flags & IM_TILE)
    img->repeat_mode (RepeatNormal);
  else
    img->repeat_mode (RepeatNone);
  img->sub_rect (-x, -y, target_width, target_height)->replace (img);

  if (bg_flags & BG_IS_VALID)
    {
      double factor = image.alpha * 1. / 0xffff;
      bg_img->blend (img, factor)->replace (img);
    }

  XRenderPictFormat *format = XRenderFindVisualFormat (dpy, visual);
  img->convert_format (format, pix_colors [Color_bg])->replace (img);

  delete bg_img;
  bg_img = img;

  return true;
}

rxvt_image::rxvt_image ()
{
  alpha = 0xffff;
  flags = 0;
  h_scale =
  v_scale = defaultScale;
  h_align =
  v_align = defaultAlign;

  img = 0;
}

bool
rxvt_image::set_file_geometry (rxvt_screen *s, const char *file)
{
  if (!file || !*file)
    return false;

  const char *p = strchr (file, ';');

  if (p)
    {
      size_t len = p - file;
      char *f = rxvt_temp_buf<char> (len + 1);
      memcpy (f, file, len);
      f[len] = '\0';
      file = f;
    }

  bool ret = set_file (s, file);
  alpha = 0x8000;
  if (ret)
    set_geometry (p ? p + 1 : "");
  return ret;
}

bool
rxvt_image::set_file (rxvt_screen *s, const char *file)
{
  delete img;
  img = rxvt_img::new_from_file (s, file);
  return img != 0;
}

# endif /* BG_IMAGE_FROM_FILE */

bool
image_effects::set_blur (const char *geom)
{
  bool changed = false;
  unsigned int hr, vr;
  int junk;
  int geom_flags = XParseGeometry (geom, &junk, &junk, &hr, &vr);

  if (!(geom_flags & WidthValue))
    hr = 1;
  if (!(geom_flags & HeightValue))
    vr = hr;

  min_it (hr, 128);
  min_it (vr, 128);

  if (h_blurRadius != hr)
    {
      changed = true;
      h_blurRadius = hr;
    }

  if (v_blurRadius != vr)
    {
      changed = true;
      v_blurRadius = vr;
    }

  return changed;
}

bool
image_effects::set_tint (const rxvt_color &new_tint)
{
  if (!tint_set || tint != new_tint)
    {
      tint = new_tint;
      tint_set = true;

      return true;
    }

  return false;
}

bool
image_effects::set_shade (const char *shade_str)
{
  int new_shade = atoi (shade_str);

  clamp_it (new_shade, -100, 200);
  if (new_shade < 0)
    new_shade = 200 - (100 + new_shade);

  if (new_shade != shade)
    {
      shade = new_shade;
      return true;
    }

  return false;
}

# if ENABLE_TRANSPARENCY
/*
 * Builds a pixmap of the same size as the terminal window that contains
 * the tiled portion of the root pixmap that is supposed to be covered by
 * our window.
 */
bool
rxvt_term::render_root_image ()
{
  /* root dimensions may change from call to call - but Display structure should
   * be always up-to-date, so let's use it :
   */
  int screen = display->screen;
  int root_width = DisplayWidth (dpy, screen);
  int root_height = DisplayHeight (dpy, screen);
  int window_width = szHint.width;
  int window_height = szHint.height;
  int sx, sy;

  sx = target_x;
  sy = target_y;

  if (!root_img)
    return false;

  /* check if we are outside of the visible part of the virtual screen : */
  if (sx + window_width <= 0 || sy + window_height <= 0
      || sx >= root_width || sy >= root_height)
    return 0;

  while (sx < 0) sx += root_img->w;
  while (sy < 0) sy += root_img->h;

  rxvt_img *img = root_img->sub_rect (sx, sy, window_width, window_height);

  if (root_effects.need_blur ())
    img->blur (root_effects.h_blurRadius, root_effects.v_blurRadius)->replace (img);

  if (root_effects.need_tint ())
    tint_image (img, root_effects.tint, root_effects.tint_set, root_effects.shade);

  XRenderPictFormat *format = XRenderFindVisualFormat (dpy, visual);
  img->convert_format (format, pix_colors [Color_bg])->replace (img);

  delete bg_img;
  bg_img = img;

  return true;
}

void
rxvt_term::bg_set_root_pixmap ()
{
  delete root_img;
  root_img = rxvt_img::new_from_root (this);
}
# endif /* ENABLE_TRANSPARENCY */

void
rxvt_term::bg_render ()
{
  if (bg_flags & BG_INHIBIT_RENDER)
    return;

  bg_invalidate ();
# if ENABLE_TRANSPARENCY
  if (bg_flags & BG_IS_TRANSPARENT)
    {
      /*  we need to re-generate transparency pixmap in that case ! */
      if (render_root_image ())
        bg_flags |= BG_IS_VALID;
    }
# endif

# if BG_IMAGE_FROM_FILE
  if (fimage.img)
    {
      if (render_image (fimage))
        bg_flags |= BG_IS_VALID;
    }
# endif

  if (!(bg_flags & BG_IS_VALID))
    {
      delete bg_img;
      bg_img = 0;
    }

  scr_recolour (false);
  bg_flags |= BG_NEEDS_REFRESH;

  bg_valid_since = ev::now ();
}

void
rxvt_term::bg_init ()
{
#if BG_IMAGE_FROM_FILE
  if (rs[Rs_backgroundPixmap])
    {
      if (fimage.set_file_geometry (this, rs[Rs_backgroundPixmap])
          && !bg_window_position_sensitive ())
        update_background ();
    }
#endif
}

void
rxvt_term::tint_image (rxvt_img *img, rxvt_color &tint, bool tint_set, int shade)
{
  rgba c (rgba::MAX_CC, rgba::MAX_CC, rgba::MAX_CC);

  if (tint_set)
    tint.get (c);

  if (shade > 100)
    {
      c.r = c.r * (200 - shade) / 100;
      c.g = c.g * (200 - shade) / 100;
      c.b = c.b * (200 - shade) / 100;
    }
  else
    {
      c.r = c.r * shade / 100;
      c.g = c.g * shade / 100;
      c.b = c.b * shade / 100;
    }

  img->contrast (c.r, c.g, c.b, c.a);

  if (shade > 100)
    {
      c.a = 0xffff;
      c.r =
      c.g =
      c.b = 0xffff * (shade - 100) / 100;
      img->brightness (c.r, c.g, c.b, c.a);
    }
}

#endif /* HAVE_BG_PIXMAP */
Revision:	1.238
Committed:	Sun Jun 10 15:48:08 2012 UTC (11 years, 11 months ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
Changes since 1.237:	+0 -17 lines
Log Message:	Remove unused function.
#	Content
1	/----------------------------------------------------------------------
2	* File: background.C - former xpm.C
3	----------------------------------------------------------------------
4	*
5	* All portions of code are copyright by their respective author/s.
6	* Copyright (c) 2005-2008 Marc Lehmann <schmorp@schmorp.de>
7	* Copyright (c) 2007 Sasha Vasko <sasha@aftercode.net>
8	* Copyright (c) 2010-2012 Emanuele Giaquinta <e.giaquinta@glauco.it>
9	*
10	* This program is free software; you can redistribute it and/or modify
11	* it under the terms of the GNU General Public License as published by
12	* the Free Software Foundation; either version 2 of the License, or
13	* (at your option) any later version.
14	*
15	* This program is distributed in the hope that it will be useful,
16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18	* GNU General Public License for more details.
19	*
20	* You should have received a copy of the GNU General Public License
21	* along with this program; if not, write to the Free Software
22	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23	---------------------------------------------------------------------/
24
25	#include "../config.h" /* NECESSARY */
26	#include "rxvt.h" /* NECESSARY */
27
28	#ifdef HAVE_BG_PIXMAP
29
30	void
31	rxvt_term::bg_destroy ()
32	{
33	# if ENABLE_TRANSPARENCY
34	delete root_img;
35	root_img = 0;
36	# endif
37
38	# if BG_IMAGE_FROM_FILE
39	fimage.destroy ();
40	# endif
41
42	delete bg_img;
43	bg_img = 0;
44	}
45
46	bool
47	rxvt_term::bg_set_position (int x, int y)
48	{
49
50	if (target_x != x
51	\|\| target_y != y)
52	{
53	target_x = x;
54	target_y = y;
55	return true;
56	}
57	return false;
58	}
59
60	bool
61	rxvt_term::bg_window_size_sensitive ()
62	{
63	# if ENABLE_TRANSPARENCY
64	if (bg_flags & BG_IS_TRANSPARENT)
65	return true;
66	# endif
67
68	# if BG_IMAGE_FROM_FILE
69	if (fimage.img)
70	{
71	if ((fimage.flags & IM_IS_SIZE_SENSITIVE)
72	\|\| fimage.img->w > szHint.width
73	\|\| fimage.img->h > szHint.height)
74	return true;
75	}
76	# endif
77
78	return false;
79	}
80
81	bool
82	rxvt_term::bg_window_position_sensitive ()
83	{
84	# if ENABLE_TRANSPARENCY
85	if (bg_flags & BG_IS_TRANSPARENT)
86	return true;
87	# endif
88
89	# if BG_IMAGE_FROM_FILE
90	if (fimage.img)
91	{
92	if (fimage.flags & IM_ROOT_ALIGN)
93	return true;
94	}
95	# endif
96
97	return false;
98	}
99
100	# if BG_IMAGE_FROM_FILE
101	static inline int
102	make_align_position (int align, int window_size, int image_size)
103	{
104	if (align >= 0 && align <= 100)
105	return lerp (0, window_size - image_size, align);
106	else if (align > 100)
107	return lerp (window_size - image_size, window_size, align - 100);
108	else
109	return lerp (-image_size, 0, align + 100);
110	}
111
112	static void
113	parse_style (const char *style, int &x, int &y, unsigned int &w, unsigned int &h, uint8_t &flags)
114	{
115	if (!strcasecmp (style, "tiled"))
116	{
117	flags = IM_TILE;
118	w = h = noScale;
119	x = y = 0;
120	}
121	else if (!strcasecmp (style, "aspect-stretched"))
122	{
123	flags = IM_KEEP_ASPECT;
124	w = h = windowScale;
125	x = y = centerAlign;
126	}
127	else if (!strcasecmp (style, "stretched"))
128	{
129	flags = 0;
130	w = h = windowScale;
131	x = y = centerAlign;
132	}
133	else if (!strcasecmp (style, "centered"))
134	{
135	flags = 0;
136	w = h = noScale;
137	x = y = centerAlign;
138	}
139	else if (!strcasecmp (style, "root-tiled"))
140	{
141	flags = IM_TILE\|IM_ROOT_ALIGN;
142	w = h = noScale;
143	x = y = 0;
144	}
145	}
146
147	bool
148	rxvt_image::set_geometry (const char *geom, bool update)
149	{
150	bool changed = false;
151	int geom_flags = 0;
152	int x = h_align;
153	int y = v_align;
154	unsigned int w = h_scale;
155	unsigned int h = v_scale;
156	uint8_t new_flags = 0;
157
158	if (geom == NULL)
159	return false;
160
161	if (geom[0])
162	{
163	char **arr = rxvt_strsplit (':', geom);
164
165	for (int i = 0; arr[i]; i++)
166	{
167	if (!strncasecmp (arr[i], "style=", 6))
168	{
169	parse_style (arr[i] + 6, x, y, w, h, new_flags);
170	geom_flags = WidthValue\|HeightValue\|XValue\|YValue;
171	}
172	else if (!strcasecmp (arr[i], "op=tile"))
173	new_flags \|= IM_TILE;
174	else if (!strcasecmp (arr[i], "op=keep-aspect"))
175	new_flags \|= IM_KEEP_ASPECT;
176	else if (!strcasecmp (arr[i], "op=root-align"))
177	new_flags \|= IM_ROOT_ALIGN;
178
179	// deprecated
180	else if (!strcasecmp (arr[i], "tile"))
181	{
182	new_flags \|= IM_TILE;
183	w = h = noScale;
184	geom_flags \|= WidthValue\|HeightValue;
185	}
186	else if (!strcasecmp (arr[i], "propscale"))
187	{
188	new_flags \|= IM_KEEP_ASPECT;
189	w = h = windowScale;
190	geom_flags \|= WidthValue\|HeightValue;
191	}
192	else if (!strcasecmp (arr[i], "hscale"))
193	{
194	new_flags \|= IM_TILE;
195	w = windowScale;
196	h = noScale;
197	geom_flags \|= WidthValue\|HeightValue;
198	}
199	else if (!strcasecmp (arr[i], "vscale"))
200	{
201	new_flags \|= IM_TILE;
202	h = windowScale;
203	w = noScale;
204	geom_flags \|= WidthValue\|HeightValue;
205	}
206	else if (!strcasecmp (arr[i], "scale"))
207	{
208	w = h = windowScale;
209	geom_flags \|= WidthValue\|HeightValue;
210	}
211	else if (!strcasecmp (arr[i], "auto"))
212	{
213	w = h = windowScale;
214	x = y = centerAlign;
215	geom_flags \|= WidthValue\|HeightValue\|XValue\|YValue;
216	}
217	else if (!strcasecmp (arr[i], "root"))
218	{
219	new_flags \|= IM_TILE\|IM_ROOT_ALIGN;
220	w = h = noScale;
221	geom_flags \|= WidthValue\|HeightValue;
222	}
223
224	else
225	geom_flags \|= XParseGeometry (arr[i], &x, &y, &w, &h);
226	} /* done parsing ops */
227
228	rxvt_free_strsplit (arr);
229	}
230
231	new_flags \|= flags & ~IM_GEOMETRY_FLAGS;
232
233	if (!update)
234	{
235	if (!(geom_flags & XValue))
236	x = y = defaultAlign;
237	else if (!(geom_flags & YValue))
238	y = x;
239
240	if (!(geom_flags & (WidthValue\|HeightValue)))
241	w = h = defaultScale;
242	else if (!(geom_flags & HeightValue))
243	h = w;
244	else if (!(geom_flags & WidthValue))
245	w = h;
246	}
247
248	clamp_it (x, -100, 200);
249	clamp_it (y, -100, 200);
250
251	if (flags != new_flags
252	\|\| h_scale != w
253	\|\| v_scale != h
254	\|\| h_align != x
255	\|\| v_align != y)
256	{
257	flags = new_flags;
258	h_scale = w;
259	v_scale = h;
260	h_align = x;
261	v_align = y;
262	changed = true;
263	}
264
265	if (is_size_sensitive ())
266	flags \|= IM_IS_SIZE_SENSITIVE;
267	else
268	flags &= ~IM_IS_SIZE_SENSITIVE;
269
270	return changed;
271	}
272
273	void
274	rxvt_term::get_image_geometry (rxvt_image &image, int &w, int &h, int &x, int &y)
275	{
276	int image_width = image.img->w;
277	int image_height = image.img->h;
278	int target_width = szHint.width;
279	int target_height = szHint.height;
280	int h_scale = min (image.h_scale, 32767 * 100 / target_width);
281	int v_scale = min (image.v_scale, 32767 * 100 / target_height);
282
283	w = h_scale * target_width / 100;
284	h = v_scale * target_height / 100;
285
286	if (image.flags & IM_KEEP_ASPECT)
287	{
288	float scale = (float)w / image_width;
289	min_it (scale, (float)h / image_height);
290	w = image_width * scale + 0.5;
291	h = image_height * scale + 0.5;
292	}
293
294	if (!w) w = image_width;
295	if (!h) h = image_height;
296
297	if (image.flags & IM_ROOT_ALIGN)
298	{
299	x = -target_x;
300	y = -target_y;
301	}
302	else
303	{
304	x = make_align_position (image.h_align, target_width, w);
305	y = make_align_position (image.v_align, target_height, h);
306	}
307	}
308
309	bool
310	rxvt_term::render_image (rxvt_image &image)
311	{
312	int target_width = szHint.width;
313	int target_height = szHint.height;
314
315	int x = 0;
316	int y = 0;
317	int w = 0;
318	int h = 0;
319
320	get_image_geometry (image, w, h, x, y);
321
322	if (!(image.flags & IM_ROOT_ALIGN)
323	&& (x >= target_width
324	\|\| y >= target_height
325	\|\| x + w <= 0
326	\|\| y + h <= 0))
327	return false;
328
329	rxvt_img *img = image.img->scale (w, h);
330
331	if (image.flags & IM_TILE)
332	img->repeat_mode (RepeatNormal);
333	else
334	img->repeat_mode (RepeatNone);
335	img->sub_rect (-x, -y, target_width, target_height)->replace (img);
336
337	if (bg_flags & BG_IS_VALID)
338	{
339	double factor = image.alpha * 1. / 0xffff;
340	bg_img->blend (img, factor)->replace (img);
341	}
342
343	XRenderPictFormat *format = XRenderFindVisualFormat (dpy, visual);
344	img->convert_format (format, pix_colors [Color_bg])->replace (img);
345
346	delete bg_img;
347	bg_img = img;
348
349	return true;
350	}
351
352	rxvt_image::rxvt_image ()
353	{
354	alpha = 0xffff;
355	flags = 0;
356	h_scale =
357	v_scale = defaultScale;
358	h_align =
359	v_align = defaultAlign;
360
361	img = 0;
362	}
363
364	bool
365	rxvt_image::set_file_geometry (rxvt_screen s, const char file)
366	{
367	if (!file \|\| !*file)
368	return false;
369
370	const char *p = strchr (file, ';');
371
372	if (p)
373	{
374	size_t len = p - file;
375	char *f = rxvt_temp_buf<char> (len + 1);
376	memcpy (f, file, len);
377	f[len] = '\0';
378	file = f;
379	}
380
381	bool ret = set_file (s, file);
382	alpha = 0x8000;
383	if (ret)
384	set_geometry (p ? p + 1 : "");
385	return ret;
386	}
387
388	bool
389	rxvt_image::set_file (rxvt_screen s, const char file)
390	{
391	delete img;
392	img = rxvt_img::new_from_file (s, file);
393	return img != 0;
394	}
395
396	# endif /* BG_IMAGE_FROM_FILE */
397
398	bool
399	image_effects::set_blur (const char *geom)
400	{
401	bool changed = false;
402	unsigned int hr, vr;
403	int junk;
404	int geom_flags = XParseGeometry (geom, &junk, &junk, &hr, &vr);
405
406	if (!(geom_flags & WidthValue))
407	hr = 1;
408	if (!(geom_flags & HeightValue))
409	vr = hr;
410
411	min_it (hr, 128);
412	min_it (vr, 128);
413
414	if (h_blurRadius != hr)
415	{
416	changed = true;
417	h_blurRadius = hr;
418	}
419
420	if (v_blurRadius != vr)
421	{
422	changed = true;
423	v_blurRadius = vr;
424	}
425
426	return changed;
427	}
428
429	bool
430	image_effects::set_tint (const rxvt_color &new_tint)
431	{
432	if (!tint_set \|\| tint != new_tint)
433	{
434	tint = new_tint;
435	tint_set = true;
436
437	return true;
438	}
439
440	return false;
441	}
442
443	bool
444	image_effects::set_shade (const char *shade_str)
445	{
446	int new_shade = atoi (shade_str);
447
448	clamp_it (new_shade, -100, 200);
449	if (new_shade < 0)
450	new_shade = 200 - (100 + new_shade);
451
452	if (new_shade != shade)
453	{
454	shade = new_shade;
455	return true;
456	}
457
458	return false;
459	}
460
461	# if ENABLE_TRANSPARENCY
462	/*
463	* Builds a pixmap of the same size as the terminal window that contains
464	* the tiled portion of the root pixmap that is supposed to be covered by
465	* our window.
466	*/
467	bool
468	rxvt_term::render_root_image ()
469	{
470	/* root dimensions may change from call to call - but Display structure should
471	* be always up-to-date, so let's use it :
472	*/
473	int screen = display->screen;
474	int root_width = DisplayWidth (dpy, screen);
475	int root_height = DisplayHeight (dpy, screen);
476	int window_width = szHint.width;
477	int window_height = szHint.height;
478	int sx, sy;
479
480	sx = target_x;
481	sy = target_y;
482
483	if (!root_img)
484	return false;
485
486	/* check if we are outside of the visible part of the virtual screen : */
487	if (sx + window_width <= 0 \|\| sy + window_height <= 0
488	\|\| sx >= root_width \|\| sy >= root_height)
489	return 0;
490
491	while (sx < 0) sx += root_img->w;
492	while (sy < 0) sy += root_img->h;
493
494	rxvt_img *img = root_img->sub_rect (sx, sy, window_width, window_height);
495
496	if (root_effects.need_blur ())
497	img->blur (root_effects.h_blurRadius, root_effects.v_blurRadius)->replace (img);
498
499	if (root_effects.need_tint ())
500	tint_image (img, root_effects.tint, root_effects.tint_set, root_effects.shade);
501
502	XRenderPictFormat *format = XRenderFindVisualFormat (dpy, visual);
503	img->convert_format (format, pix_colors [Color_bg])->replace (img);
504
505	delete bg_img;
506	bg_img = img;
507
508	return true;
509	}
510
511	void
512	rxvt_term::bg_set_root_pixmap ()
513	{
514	delete root_img;
515	root_img = rxvt_img::new_from_root (this);
516	}
517	# endif /* ENABLE_TRANSPARENCY */
518
519	void
520	rxvt_term::bg_render ()
521	{
522	if (bg_flags & BG_INHIBIT_RENDER)
523	return;
524
525	bg_invalidate ();
526	# if ENABLE_TRANSPARENCY
527	if (bg_flags & BG_IS_TRANSPARENT)
528	{
529	/* we need to re-generate transparency pixmap in that case ! */
530	if (render_root_image ())
531	bg_flags \|= BG_IS_VALID;
532	}
533	# endif
534
535	# if BG_IMAGE_FROM_FILE
536	if (fimage.img)
537	{
538	if (render_image (fimage))
539	bg_flags \|= BG_IS_VALID;
540	}
541	# endif
542
543	if (!(bg_flags & BG_IS_VALID))
544	{
545	delete bg_img;
546	bg_img = 0;
547	}
548
549	scr_recolour (false);
550	bg_flags \|= BG_NEEDS_REFRESH;
551
552	bg_valid_since = ev::now ();
553	}
554
555	void
556	rxvt_term::bg_init ()
557	{
558	#if BG_IMAGE_FROM_FILE
559	if (rs[Rs_backgroundPixmap])
560	{
561	if (fimage.set_file_geometry (this, rs[Rs_backgroundPixmap])
562	&& !bg_window_position_sensitive ())
563	update_background ();
564	}
565	#endif
566	}
567
568	void
569	rxvt_term::tint_image (rxvt_img *img, rxvt_color &tint, bool tint_set, int shade)
570	{
571	rgba c (rgba::MAX_CC, rgba::MAX_CC, rgba::MAX_CC);
572
573	if (tint_set)
574	tint.get (c);
575
576	if (shade > 100)
577	{
578	c.r = c.r * (200 - shade) / 100;
579	c.g = c.g * (200 - shade) / 100;
580	c.b = c.b * (200 - shade) / 100;
581	}
582	else
583	{
584	c.r = c.r * shade / 100;
585	c.g = c.g * shade / 100;
586	c.b = c.b * shade / 100;
587	}
588
589	img->contrast (c.r, c.g, c.b, c.a);
590
591	if (shade > 100)
592	{
593	c.a = 0xffff;
594	c.r =
595	c.g =
596	c.b = 0xffff * (shade - 100) / 100;
597	img->brightness (c.r, c.g, c.b, c.a);
598	}
599	}
600
601	#endif /* HAVE_BG_PIXMAP */