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 inline int
make_clip_rectangle (int pos, int size, int target_size, int &dst_pos, int &dst_size)
{
  int src_pos = 0;
  dst_pos = pos;
  dst_size = size;
  if (pos < 0)
    {
      src_pos = -pos;
      dst_pos = 0;
      dst_size += pos;
    }

  min_it (dst_size, target_size - dst_pos);
  return src_pos;
}

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:	1.237
Committed:	Sun Jun 10 15:01:14 2012 UTC (11 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.236:	+2 -0 lines
Log Message:	must have been in a hurry
#	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 inline int
113	make_clip_rectangle (int pos, int size, int target_size, int &dst_pos, int &dst_size)
114	{
115	int src_pos = 0;
116	dst_pos = pos;
117	dst_size = size;
118	if (pos < 0)
119	{
120	src_pos = -pos;
121	dst_pos = 0;
122	dst_size += pos;
123	}
124
125	min_it (dst_size, target_size - dst_pos);
126	return src_pos;
127	}
128
129	static void
130	parse_style (const char *style, int &x, int &y, unsigned int &w, unsigned int &h, uint8_t &flags)
131	{
132	if (!strcasecmp (style, "tiled"))
133	{
134	flags = IM_TILE;
135	w = h = noScale;
136	x = y = 0;
137	}
138	else if (!strcasecmp (style, "aspect-stretched"))
139	{
140	flags = IM_KEEP_ASPECT;
141	w = h = windowScale;
142	x = y = centerAlign;
143	}
144	else if (!strcasecmp (style, "stretched"))
145	{
146	flags = 0;
147	w = h = windowScale;
148	x = y = centerAlign;
149	}
150	else if (!strcasecmp (style, "centered"))
151	{
152	flags = 0;
153	w = h = noScale;
154	x = y = centerAlign;
155	}
156	else if (!strcasecmp (style, "root-tiled"))
157	{
158	flags = IM_TILE\|IM_ROOT_ALIGN;
159	w = h = noScale;
160	x = y = 0;
161	}
162	}
163
164	bool
165	rxvt_image::set_geometry (const char *geom, bool update)
166	{
167	bool changed = false;
168	int geom_flags = 0;
169	int x = h_align;
170	int y = v_align;
171	unsigned int w = h_scale;
172	unsigned int h = v_scale;
173	uint8_t new_flags = 0;
174
175	if (geom == NULL)
176	return false;
177
178	if (geom[0])
179	{
180	char **arr = rxvt_strsplit (':', geom);
181
182	for (int i = 0; arr[i]; i++)
183	{
184	if (!strncasecmp (arr[i], "style=", 6))
185	{
186	parse_style (arr[i] + 6, x, y, w, h, new_flags);
187	geom_flags = WidthValue\|HeightValue\|XValue\|YValue;
188	}
189	else if (!strcasecmp (arr[i], "op=tile"))
190	new_flags \|= IM_TILE;
191	else if (!strcasecmp (arr[i], "op=keep-aspect"))
192	new_flags \|= IM_KEEP_ASPECT;
193	else if (!strcasecmp (arr[i], "op=root-align"))
194	new_flags \|= IM_ROOT_ALIGN;
195
196	// deprecated
197	else if (!strcasecmp (arr[i], "tile"))
198	{
199	new_flags \|= IM_TILE;
200	w = h = noScale;
201	geom_flags \|= WidthValue\|HeightValue;
202	}
203	else if (!strcasecmp (arr[i], "propscale"))
204	{
205	new_flags \|= IM_KEEP_ASPECT;
206	w = h = windowScale;
207	geom_flags \|= WidthValue\|HeightValue;
208	}
209	else if (!strcasecmp (arr[i], "hscale"))
210	{
211	new_flags \|= IM_TILE;
212	w = windowScale;
213	h = noScale;
214	geom_flags \|= WidthValue\|HeightValue;
215	}
216	else if (!strcasecmp (arr[i], "vscale"))
217	{
218	new_flags \|= IM_TILE;
219	h = windowScale;
220	w = noScale;
221	geom_flags \|= WidthValue\|HeightValue;
222	}
223	else if (!strcasecmp (arr[i], "scale"))
224	{
225	w = h = windowScale;
226	geom_flags \|= WidthValue\|HeightValue;
227	}
228	else if (!strcasecmp (arr[i], "auto"))
229	{
230	w = h = windowScale;
231	x = y = centerAlign;
232	geom_flags \|= WidthValue\|HeightValue\|XValue\|YValue;
233	}
234	else if (!strcasecmp (arr[i], "root"))
235	{
236	new_flags \|= IM_TILE\|IM_ROOT_ALIGN;
237	w = h = noScale;
238	geom_flags \|= WidthValue\|HeightValue;
239	}
240
241	else
242	geom_flags \|= XParseGeometry (arr[i], &x, &y, &w, &h);
243	} /* done parsing ops */
244
245	rxvt_free_strsplit (arr);
246	}
247
248	new_flags \|= flags & ~IM_GEOMETRY_FLAGS;
249
250	if (!update)
251	{
252	if (!(geom_flags & XValue))
253	x = y = defaultAlign;
254	else if (!(geom_flags & YValue))
255	y = x;
256
257	if (!(geom_flags & (WidthValue\|HeightValue)))
258	w = h = defaultScale;
259	else if (!(geom_flags & HeightValue))
260	h = w;
261	else if (!(geom_flags & WidthValue))
262	w = h;
263	}
264
265	clamp_it (x, -100, 200);
266	clamp_it (y, -100, 200);
267
268	if (flags != new_flags
269	\|\| h_scale != w
270	\|\| v_scale != h
271	\|\| h_align != x
272	\|\| v_align != y)
273	{
274	flags = new_flags;
275	h_scale = w;
276	v_scale = h;
277	h_align = x;
278	v_align = y;
279	changed = true;
280	}
281
282	if (is_size_sensitive ())
283	flags \|= IM_IS_SIZE_SENSITIVE;
284	else
285	flags &= ~IM_IS_SIZE_SENSITIVE;
286
287	return changed;
288	}
289
290	void
291	rxvt_term::get_image_geometry (rxvt_image &image, int &w, int &h, int &x, int &y)
292	{
293	int image_width = image.img->w;
294	int image_height = image.img->h;
295	int target_width = szHint.width;
296	int target_height = szHint.height;
297	int h_scale = min (image.h_scale, 32767 * 100 / target_width);
298	int v_scale = min (image.v_scale, 32767 * 100 / target_height);
299
300	w = h_scale * target_width / 100;
301	h = v_scale * target_height / 100;
302
303	if (image.flags & IM_KEEP_ASPECT)
304	{
305	float scale = (float)w / image_width;
306	min_it (scale, (float)h / image_height);
307	w = image_width * scale + 0.5;
308	h = image_height * scale + 0.5;
309	}
310
311	if (!w) w = image_width;
312	if (!h) h = image_height;
313
314	if (image.flags & IM_ROOT_ALIGN)
315	{
316	x = -target_x;
317	y = -target_y;
318	}
319	else
320	{
321	x = make_align_position (image.h_align, target_width, w);
322	y = make_align_position (image.v_align, target_height, h);
323	}
324	}
325
326	bool
327	rxvt_term::render_image (rxvt_image &image)
328	{
329	int target_width = szHint.width;
330	int target_height = szHint.height;
331
332	int x = 0;
333	int y = 0;
334	int w = 0;
335	int h = 0;
336
337	get_image_geometry (image, w, h, x, y);
338
339	if (!(image.flags & IM_ROOT_ALIGN)
340	&& (x >= target_width
341	\|\| y >= target_height
342	\|\| x + w <= 0
343	\|\| y + h <= 0))
344	return false;
345
346	rxvt_img *img = image.img->scale (w, h);
347
348	if (image.flags & IM_TILE)
349	img->repeat_mode (RepeatNormal);
350	else
351	img->repeat_mode (RepeatNone);
352	img->sub_rect (-x, -y, target_width, target_height)->replace (img);
353
354	if (bg_flags & BG_IS_VALID)
355	{
356	double factor = image.alpha * 1. / 0xffff;
357	bg_img->blend (img, factor)->replace (img);
358	}
359
360	XRenderPictFormat *format = XRenderFindVisualFormat (dpy, visual);
361	img->convert_format (format, pix_colors [Color_bg])->replace (img);
362
363	delete bg_img;
364	bg_img = img;
365
366	return true;
367	}
368
369	rxvt_image::rxvt_image ()
370	{
371	alpha = 0xffff;
372	flags = 0;
373	h_scale =
374	v_scale = defaultScale;
375	h_align =
376	v_align = defaultAlign;
377
378	img = 0;
379	}
380
381	bool
382	rxvt_image::set_file_geometry (rxvt_screen s, const char file)
383	{
384	if (!file \|\| !*file)
385	return false;
386
387	const char *p = strchr (file, ';');
388
389	if (p)
390	{
391	size_t len = p - file;
392	char *f = rxvt_temp_buf<char> (len + 1);
393	memcpy (f, file, len);
394	f[len] = '\0';
395	file = f;
396	}
397
398	bool ret = set_file (s, file);
399	alpha = 0x8000;
400	if (ret)
401	set_geometry (p ? p + 1 : "");
402	return ret;
403	}
404
405	bool
406	rxvt_image::set_file (rxvt_screen s, const char file)
407	{
408	delete img;
409	img = rxvt_img::new_from_file (s, file);
410	return img != 0;
411	}
412
413	# endif /* BG_IMAGE_FROM_FILE */
414
415	bool
416	image_effects::set_blur (const char *geom)
417	{
418	bool changed = false;
419	unsigned int hr, vr;
420	int junk;
421	int geom_flags = XParseGeometry (geom, &junk, &junk, &hr, &vr);
422
423	if (!(geom_flags & WidthValue))
424	hr = 1;
425	if (!(geom_flags & HeightValue))
426	vr = hr;
427
428	min_it (hr, 128);
429	min_it (vr, 128);
430
431	if (h_blurRadius != hr)
432	{
433	changed = true;
434	h_blurRadius = hr;
435	}
436
437	if (v_blurRadius != vr)
438	{
439	changed = true;
440	v_blurRadius = vr;
441	}
442
443	return changed;
444	}
445
446	bool
447	image_effects::set_tint (const rxvt_color &new_tint)
448	{
449	if (!tint_set \|\| tint != new_tint)
450	{
451	tint = new_tint;
452	tint_set = true;
453
454	return true;
455	}
456
457	return false;
458	}
459
460	bool
461	image_effects::set_shade (const char *shade_str)
462	{
463	int new_shade = atoi (shade_str);
464
465	clamp_it (new_shade, -100, 200);
466	if (new_shade < 0)
467	new_shade = 200 - (100 + new_shade);
468
469	if (new_shade != shade)
470	{
471	shade = new_shade;
472	return true;
473	}
474
475	return false;
476	}
477
478	# if ENABLE_TRANSPARENCY
479	/*
480	* Builds a pixmap of the same size as the terminal window that contains
481	* the tiled portion of the root pixmap that is supposed to be covered by
482	* our window.
483	*/
484	bool
485	rxvt_term::render_root_image ()
486	{
487	/* root dimensions may change from call to call - but Display structure should
488	* be always up-to-date, so let's use it :
489	*/
490	int screen = display->screen;
491	int root_width = DisplayWidth (dpy, screen);
492	int root_height = DisplayHeight (dpy, screen);
493	int window_width = szHint.width;
494	int window_height = szHint.height;
495	int sx, sy;
496
497	sx = target_x;
498	sy = target_y;
499
500	if (!root_img)
501	return false;
502
503	/* check if we are outside of the visible part of the virtual screen : */
504	if (sx + window_width <= 0 \|\| sy + window_height <= 0
505	\|\| sx >= root_width \|\| sy >= root_height)
506	return 0;
507
508	while (sx < 0) sx += root_img->w;
509	while (sy < 0) sy += root_img->h;
510
511	rxvt_img *img = root_img->sub_rect (sx, sy, window_width, window_height);
512
513	if (root_effects.need_blur ())
514	img->blur (root_effects.h_blurRadius, root_effects.v_blurRadius)->replace (img);
515
516	if (root_effects.need_tint ())
517	tint_image (img, root_effects.tint, root_effects.tint_set, root_effects.shade);
518
519	XRenderPictFormat *format = XRenderFindVisualFormat (dpy, visual);
520	img->convert_format (format, pix_colors [Color_bg])->replace (img);
521
522	delete bg_img;
523	bg_img = img;
524
525	return true;
526	}
527
528	void
529	rxvt_term::bg_set_root_pixmap ()
530	{
531	delete root_img;
532	root_img = rxvt_img::new_from_root (this);
533	}
534	# endif /* ENABLE_TRANSPARENCY */
535
536	void
537	rxvt_term::bg_render ()
538	{
539	if (bg_flags & BG_INHIBIT_RENDER)
540	return;
541
542	bg_invalidate ();
543	# if ENABLE_TRANSPARENCY
544	if (bg_flags & BG_IS_TRANSPARENT)
545	{
546	/* we need to re-generate transparency pixmap in that case ! */
547	if (render_root_image ())
548	bg_flags \|= BG_IS_VALID;
549	}
550	# endif
551
552	# if BG_IMAGE_FROM_FILE
553	if (fimage.img)
554	{
555	if (render_image (fimage))
556	bg_flags \|= BG_IS_VALID;
557	}
558	# endif
559
560	if (!(bg_flags & BG_IS_VALID))
561	{
562	delete bg_img;
563	bg_img = 0;
564	}
565
566	scr_recolour (false);
567	bg_flags \|= BG_NEEDS_REFRESH;
568
569	bg_valid_since = ev::now ();
570	}
571
572	void
573	rxvt_term::bg_init ()
574	{
575	#if BG_IMAGE_FROM_FILE
576	if (rs[Rs_backgroundPixmap])
577	{
578	if (fimage.set_file_geometry (this, rs[Rs_backgroundPixmap])
579	&& !bg_window_position_sensitive ())
580	update_background ();
581	}
582	#endif
583	}
584
585	void
586	rxvt_term::tint_image (rxvt_img *img, rxvt_color &tint, bool tint_set, int shade)
587	{
588	rgba c (rgba::MAX_CC, rgba::MAX_CC, rgba::MAX_CC);
589
590	if (tint_set)
591	tint.get (c);
592
593	if (shade > 100)
594	{
595	c.r = c.r * (200 - shade) / 100;
596	c.g = c.g * (200 - shade) / 100;
597	c.b = c.b * (200 - shade) / 100;
598	}
599	else
600	{
601	c.r = c.r * shade / 100;
602	c.g = c.g * shade / 100;
603	c.b = c.b * shade / 100;
604	}
605
606	img->contrast (c.r, c.g, c.b, c.a);
607
608	if (shade > 100)
609	{
610	c.a = 0xffff;
611	c.r =
612	c.g =
613	c.b = 0xffff * (shade - 100) / 100;
614	img->brightness (c.r, c.g, c.b, c.a);
615	}
616	}
617
618	#endif /* HAVE_BG_PIXMAP */