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_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 parent_width = szHint.width;
  int parent_height = szHint.height;
  int h_scale = min (image.h_scale, 32767 * 100 / parent_width);
  int v_scale = min (image.v_scale, 32767 * 100 / parent_height);

  w = h_scale * parent_width / 100;
  h = v_scale * parent_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 = -parent_x;
      y = -parent_y;
    }
  else
    {
      x = make_align_position (image.h_align, parent_width, w);
      y = make_align_position (image.v_align, parent_height, h);
    }
}

bool
rxvt_term::render_image (rxvt_image &image)
{
  int parent_width = szHint.width;
  int parent_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 >= parent_width
          || y >= parent_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, parent_width, parent_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 parent_width = szHint.width;
  int parent_height = szHint.height;
  int sx, sy;

  sx = parent_x;
  sy = parent_y;

  if (!root_img)
    return false;

  /* check if we are outside of the visible part of the virtual screen : */
  if (sx + parent_width <= 0 || sy + parent_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, parent_width, parent_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:	1.240
Committed:	Mon Jun 11 13:23:01 2012 UTC (11 years, 11 months ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
Changes since 1.239:	+17 -17 lines
Log Message:	Rename variables.
#	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_window_size_sensitive ()
48	{
49	# if ENABLE_TRANSPARENCY
50	if (bg_flags & BG_IS_TRANSPARENT)
51	return true;
52	# endif
53
54	# if BG_IMAGE_FROM_FILE
55	if (fimage.img)
56	{
57	if ((fimage.flags & IM_IS_SIZE_SENSITIVE)
58	\|\| fimage.img->w > szHint.width
59	\|\| fimage.img->h > szHint.height)
60	return true;
61	}
62	# endif
63
64	return false;
65	}
66
67	bool
68	rxvt_term::bg_window_position_sensitive ()
69	{
70	# if ENABLE_TRANSPARENCY
71	if (bg_flags & BG_IS_TRANSPARENT)
72	return true;
73	# endif
74
75	# if BG_IMAGE_FROM_FILE
76	if (fimage.img)
77	{
78	if (fimage.flags & IM_ROOT_ALIGN)
79	return true;
80	}
81	# endif
82
83	return false;
84	}
85
86	# if BG_IMAGE_FROM_FILE
87	static inline int
88	make_align_position (int align, int window_size, int image_size)
89	{
90	if (align >= 0 && align <= 100)
91	return lerp (0, window_size - image_size, align);
92	else if (align > 100)
93	return lerp (window_size - image_size, window_size, align - 100);
94	else
95	return lerp (-image_size, 0, align + 100);
96	}
97
98	static void
99	parse_style (const char *style, int &x, int &y, unsigned int &w, unsigned int &h, uint8_t &flags)
100	{
101	if (!strcasecmp (style, "tiled"))
102	{
103	flags = IM_TILE;
104	w = h = noScale;
105	x = y = 0;
106	}
107	else if (!strcasecmp (style, "aspect-stretched"))
108	{
109	flags = IM_KEEP_ASPECT;
110	w = h = windowScale;
111	x = y = centerAlign;
112	}
113	else if (!strcasecmp (style, "stretched"))
114	{
115	flags = 0;
116	w = h = windowScale;
117	x = y = centerAlign;
118	}
119	else if (!strcasecmp (style, "centered"))
120	{
121	flags = 0;
122	w = h = noScale;
123	x = y = centerAlign;
124	}
125	else if (!strcasecmp (style, "root-tiled"))
126	{
127	flags = IM_TILE\|IM_ROOT_ALIGN;
128	w = h = noScale;
129	x = y = 0;
130	}
131	}
132
133	bool
134	rxvt_image::set_geometry (const char *geom, bool update)
135	{
136	bool changed = false;
137	int geom_flags = 0;
138	int x = h_align;
139	int y = v_align;
140	unsigned int w = h_scale;
141	unsigned int h = v_scale;
142	uint8_t new_flags = 0;
143
144	if (geom == NULL)
145	return false;
146
147	if (geom[0])
148	{
149	char **arr = rxvt_strsplit (':', geom);
150
151	for (int i = 0; arr[i]; i++)
152	{
153	if (!strncasecmp (arr[i], "style=", 6))
154	{
155	parse_style (arr[i] + 6, x, y, w, h, new_flags);
156	geom_flags = WidthValue\|HeightValue\|XValue\|YValue;
157	}
158	else if (!strcasecmp (arr[i], "op=tile"))
159	new_flags \|= IM_TILE;
160	else if (!strcasecmp (arr[i], "op=keep-aspect"))
161	new_flags \|= IM_KEEP_ASPECT;
162	else if (!strcasecmp (arr[i], "op=root-align"))
163	new_flags \|= IM_ROOT_ALIGN;
164
165	// deprecated
166	else if (!strcasecmp (arr[i], "tile"))
167	{
168	new_flags \|= IM_TILE;
169	w = h = noScale;
170	geom_flags \|= WidthValue\|HeightValue;
171	}
172	else if (!strcasecmp (arr[i], "propscale"))
173	{
174	new_flags \|= IM_KEEP_ASPECT;
175	w = h = windowScale;
176	geom_flags \|= WidthValue\|HeightValue;
177	}
178	else if (!strcasecmp (arr[i], "hscale"))
179	{
180	new_flags \|= IM_TILE;
181	w = windowScale;
182	h = noScale;
183	geom_flags \|= WidthValue\|HeightValue;
184	}
185	else if (!strcasecmp (arr[i], "vscale"))
186	{
187	new_flags \|= IM_TILE;
188	h = windowScale;
189	w = noScale;
190	geom_flags \|= WidthValue\|HeightValue;
191	}
192	else if (!strcasecmp (arr[i], "scale"))
193	{
194	w = h = windowScale;
195	geom_flags \|= WidthValue\|HeightValue;
196	}
197	else if (!strcasecmp (arr[i], "auto"))
198	{
199	w = h = windowScale;
200	x = y = centerAlign;
201	geom_flags \|= WidthValue\|HeightValue\|XValue\|YValue;
202	}
203	else if (!strcasecmp (arr[i], "root"))
204	{
205	new_flags \|= IM_TILE\|IM_ROOT_ALIGN;
206	w = h = noScale;
207	geom_flags \|= WidthValue\|HeightValue;
208	}
209
210	else
211	geom_flags \|= XParseGeometry (arr[i], &x, &y, &w, &h);
212	} /* done parsing ops */
213
214	rxvt_free_strsplit (arr);
215	}
216
217	new_flags \|= flags & ~IM_GEOMETRY_FLAGS;
218
219	if (!update)
220	{
221	if (!(geom_flags & XValue))
222	x = y = defaultAlign;
223	else if (!(geom_flags & YValue))
224	y = x;
225
226	if (!(geom_flags & (WidthValue\|HeightValue)))
227	w = h = defaultScale;
228	else if (!(geom_flags & HeightValue))
229	h = w;
230	else if (!(geom_flags & WidthValue))
231	w = h;
232	}
233
234	clamp_it (x, -100, 200);
235	clamp_it (y, -100, 200);
236
237	if (flags != new_flags
238	\|\| h_scale != w
239	\|\| v_scale != h
240	\|\| h_align != x
241	\|\| v_align != y)
242	{
243	flags = new_flags;
244	h_scale = w;
245	v_scale = h;
246	h_align = x;
247	v_align = y;
248	changed = true;
249	}
250
251	if (is_size_sensitive ())
252	flags \|= IM_IS_SIZE_SENSITIVE;
253	else
254	flags &= ~IM_IS_SIZE_SENSITIVE;
255
256	return changed;
257	}
258
259	void
260	rxvt_term::get_image_geometry (rxvt_image &image, int &w, int &h, int &x, int &y)
261	{
262	int image_width = image.img->w;
263	int image_height = image.img->h;
264	int parent_width = szHint.width;
265	int parent_height = szHint.height;
266	int h_scale = min (image.h_scale, 32767 * 100 / parent_width);
267	int v_scale = min (image.v_scale, 32767 * 100 / parent_height);
268
269	w = h_scale * parent_width / 100;
270	h = v_scale * parent_height / 100;
271
272	if (image.flags & IM_KEEP_ASPECT)
273	{
274	float scale = (float)w / image_width;
275	min_it (scale, (float)h / image_height);
276	w = image_width * scale + 0.5;
277	h = image_height * scale + 0.5;
278	}
279
280	if (!w) w = image_width;
281	if (!h) h = image_height;
282
283	if (image.flags & IM_ROOT_ALIGN)
284	{
285	x = -parent_x;
286	y = -parent_y;
287	}
288	else
289	{
290	x = make_align_position (image.h_align, parent_width, w);
291	y = make_align_position (image.v_align, parent_height, h);
292	}
293	}
294
295	bool
296	rxvt_term::render_image (rxvt_image &image)
297	{
298	int parent_width = szHint.width;
299	int parent_height = szHint.height;
300
301	int x = 0;
302	int y = 0;
303	int w = 0;
304	int h = 0;
305
306	get_image_geometry (image, w, h, x, y);
307
308	if (!(image.flags & IM_ROOT_ALIGN)
309	&& (x >= parent_width
310	\|\| y >= parent_height
311	\|\| x + w <= 0
312	\|\| y + h <= 0))
313	return false;
314
315	rxvt_img *img = image.img->scale (w, h);
316
317	if (image.flags & IM_TILE)
318	img->repeat_mode (RepeatNormal);
319	else
320	img->repeat_mode (RepeatNone);
321	img->sub_rect (-x, -y, parent_width, parent_height)->replace (img);
322
323	if (bg_flags & BG_IS_VALID)
324	{
325	double factor = image.alpha * 1. / 0xffff;
326	bg_img->blend (img, factor)->replace (img);
327	}
328
329	XRenderPictFormat *format = XRenderFindVisualFormat (dpy, visual);
330	img->convert_format (format, pix_colors [Color_bg])->replace (img);
331
332	delete bg_img;
333	bg_img = img;
334
335	return true;
336	}
337
338	rxvt_image::rxvt_image ()
339	{
340	alpha = 0xffff;
341	flags = 0;
342	h_scale =
343	v_scale = defaultScale;
344	h_align =
345	v_align = defaultAlign;
346
347	img = 0;
348	}
349
350	bool
351	rxvt_image::set_file_geometry (rxvt_screen s, const char file)
352	{
353	if (!file \|\| !*file)
354	return false;
355
356	const char *p = strchr (file, ';');
357
358	if (p)
359	{
360	size_t len = p - file;
361	char *f = rxvt_temp_buf<char> (len + 1);
362	memcpy (f, file, len);
363	f[len] = '\0';
364	file = f;
365	}
366
367	bool ret = set_file (s, file);
368	alpha = 0x8000;
369	if (ret)
370	set_geometry (p ? p + 1 : "");
371	return ret;
372	}
373
374	bool
375	rxvt_image::set_file (rxvt_screen s, const char file)
376	{
377	delete img;
378	img = rxvt_img::new_from_file (s, file);
379	return img != 0;
380	}
381
382	# endif /* BG_IMAGE_FROM_FILE */
383
384	bool
385	image_effects::set_blur (const char *geom)
386	{
387	bool changed = false;
388	unsigned int hr, vr;
389	int junk;
390	int geom_flags = XParseGeometry (geom, &junk, &junk, &hr, &vr);
391
392	if (!(geom_flags & WidthValue))
393	hr = 1;
394	if (!(geom_flags & HeightValue))
395	vr = hr;
396
397	min_it (hr, 128);
398	min_it (vr, 128);
399
400	if (h_blurRadius != hr)
401	{
402	changed = true;
403	h_blurRadius = hr;
404	}
405
406	if (v_blurRadius != vr)
407	{
408	changed = true;
409	v_blurRadius = vr;
410	}
411
412	return changed;
413	}
414
415	bool
416	image_effects::set_tint (const rxvt_color &new_tint)
417	{
418	if (!tint_set \|\| tint != new_tint)
419	{
420	tint = new_tint;
421	tint_set = true;
422
423	return true;
424	}
425
426	return false;
427	}
428
429	bool
430	image_effects::set_shade (const char *shade_str)
431	{
432	int new_shade = atoi (shade_str);
433
434	clamp_it (new_shade, -100, 200);
435	if (new_shade < 0)
436	new_shade = 200 - (100 + new_shade);
437
438	if (new_shade != shade)
439	{
440	shade = new_shade;
441	return true;
442	}
443
444	return false;
445	}
446
447	# if ENABLE_TRANSPARENCY
448	/*
449	* Builds a pixmap of the same size as the terminal window that contains
450	* the tiled portion of the root pixmap that is supposed to be covered by
451	* our window.
452	*/
453	bool
454	rxvt_term::render_root_image ()
455	{
456	/* root dimensions may change from call to call - but Display structure should
457	* be always up-to-date, so let's use it :
458	*/
459	int screen = display->screen;
460	int root_width = DisplayWidth (dpy, screen);
461	int root_height = DisplayHeight (dpy, screen);
462	int parent_width = szHint.width;
463	int parent_height = szHint.height;
464	int sx, sy;
465
466	sx = parent_x;
467	sy = parent_y;
468
469	if (!root_img)
470	return false;
471
472	/* check if we are outside of the visible part of the virtual screen : */
473	if (sx + parent_width <= 0 \|\| sy + parent_height <= 0
474	\|\| sx >= root_width \|\| sy >= root_height)
475	return 0;
476
477	while (sx < 0) sx += root_img->w;
478	while (sy < 0) sy += root_img->h;
479
480	rxvt_img *img = root_img->sub_rect (sx, sy, parent_width, parent_height);
481
482	if (root_effects.need_blur ())
483	img->blur (root_effects.h_blurRadius, root_effects.v_blurRadius)->replace (img);
484
485	if (root_effects.need_tint ())
486	tint_image (img, root_effects.tint, root_effects.tint_set, root_effects.shade);
487
488	XRenderPictFormat *format = XRenderFindVisualFormat (dpy, visual);
489	img->convert_format (format, pix_colors [Color_bg])->replace (img);
490
491	delete bg_img;
492	bg_img = img;
493
494	return true;
495	}
496
497	void
498	rxvt_term::bg_set_root_pixmap ()
499	{
500	delete root_img;
501	root_img = rxvt_img::new_from_root (this);
502	}
503	# endif /* ENABLE_TRANSPARENCY */
504
505	void
506	rxvt_term::bg_render ()
507	{
508	if (bg_flags & BG_INHIBIT_RENDER)
509	return;
510
511	bg_invalidate ();
512	# if ENABLE_TRANSPARENCY
513	if (bg_flags & BG_IS_TRANSPARENT)
514	{
515	/* we need to re-generate transparency pixmap in that case ! */
516	if (render_root_image ())
517	bg_flags \|= BG_IS_VALID;
518	}
519	# endif
520
521	# if BG_IMAGE_FROM_FILE
522	if (fimage.img)
523	{
524	if (render_image (fimage))
525	bg_flags \|= BG_IS_VALID;
526	}
527	# endif
528
529	if (!(bg_flags & BG_IS_VALID))
530	{
531	delete bg_img;
532	bg_img = 0;
533	}
534
535	scr_recolour (false);
536	bg_flags \|= BG_NEEDS_REFRESH;
537
538	bg_valid_since = ev::now ();
539	}
540
541	void
542	rxvt_term::bg_init ()
543	{
544	#if BG_IMAGE_FROM_FILE
545	if (rs[Rs_backgroundPixmap])
546	{
547	if (fimage.set_file_geometry (this, rs[Rs_backgroundPixmap])
548	&& !bg_window_position_sensitive ())
549	update_background ();
550	}
551	#endif
552	}
553
554	void
555	rxvt_term::tint_image (rxvt_img *img, rxvt_color &tint, bool tint_set, int shade)
556	{
557	rgba c (rgba::MAX_CC, rgba::MAX_CC, rgba::MAX_CC);
558
559	if (tint_set)
560	tint.get (c);
561
562	if (shade > 100)
563	{
564	c.r = c.r * (200 - shade) / 100;
565	c.g = c.g * (200 - shade) / 100;
566	c.b = c.b * (200 - shade) / 100;
567	}
568	else
569	{
570	c.r = c.r * shade / 100;
571	c.g = c.g * shade / 100;
572	c.b = c.b * shade / 100;
573	}
574
575	img->contrast (c.r, c.g, c.b, c.a);
576
577	if (shade > 100)
578	{
579	c.a = 0xffff;
580	c.r =
581	c.g =
582	c.b = 0xffff * (shade - 100) / 100;
583	img->brightness (c.r, c.g, c.b, c.a);
584	}
585	}
586
587	#endif /* HAVE_BG_PIXMAP */