rxvt-unicode/src/rxvtimg.C

#include <math.h>
#include "../config.h"
#include "rxvt.h"

#if HAVE_IMG

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

rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int width, int height)
: s(screen), w(width), h(height), format(format), shared(false)
{
  pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
}

rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int width, int height, Pixmap pixmap)
: s(screen), pm(pixmap), w(width), h(height), format(format), shared(false)
{
}

rxvt_img *
rxvt_img::new_from_file (rxvt_screen *s, const char *filename)
{
  GError *err;
  GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);

  if (!pb)
    return 0;

  rxvt_img *img = new rxvt_img (
     s,
     XRenderFindStandardFormat (s->display->dpy, gdk_pixbuf_get_has_alpha (pb) ? PictStandardARGB32 : PictStandardRGB24),
     gdk_pixbuf_get_width (pb),
     gdk_pixbuf_get_height (pb)
  );

  img->render (pb, 0, 0, img->w, img->h, 0, 0);

  return img;
}

rxvt_img::~rxvt_img ()
{
  if (!shared)
    XFreePixmap (s->display->dpy, pm);
}

void
rxvt_img::fill (const rxvt_color &c)
{
  XGCValues gcv;
  gcv.foreground = c;
  GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv);
  XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h);
  XFreeGC (s->display->dpy, gc);
}

static void
get_gaussian_kernel (int radius, int width, double *kernel, XFixed *params)
{
  double sigma = radius / 2.0;
  double scale = sqrt (2.0 * M_PI) * sigma;
  double sum = 0.0;

  for (int i = 0; i < width; i++)
    {
      double x = i - width / 2;
      kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
      sum += kernel[i];
    }

  params[0] = XDoubleToFixed (width);
  params[1] = XDoubleToFixed (1);

  for (int i = 0; i < width; i++)
    params[i+2] = XDoubleToFixed (kernel[i] / sum);
}

void
rxvt_img::blur (int rh, int rv)
{
  if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
    return;

  Display *dpy = s->display->dpy;
  int size = max (rh, rv) * 2 + 1;
  double *kernel = (double *)malloc (size * sizeof (double));
  XFixed *params = (XFixed *)malloc ((size + 2) * sizeof (XFixed));

  XRenderPictureAttributes pa;

  pa.repeat = RepeatPad;
  Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
  Pixmap tmp = XCreatePixmap (dpy, pm, w, h, format->depth);
  Picture dst = XRenderCreatePicture (dpy, tmp, format, CPRepeat, &pa);
  XFreePixmap (dpy, tmp);

  if (kernel && params)
    {
      size = rh * 2 + 1;
      get_gaussian_kernel (rh, size, kernel, params);

      XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
      XRenderComposite (dpy,
                        PictOpSrc,
                        src,
                        None,
                        dst,
                        0, 0,
                        0, 0,
                        0, 0,
                        w, h);

      ::swap (src, dst);

      size = rv * 2 + 1;
      get_gaussian_kernel (rv, size, kernel, params);
      ::swap (params[0], params[1]);

      XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
      XRenderComposite (dpy,
                        PictOpSrc,
                        src,
                        None,
                        dst,
                        0, 0,
                        0, 0,
                        0, 0,
                        w, h);
    }

  free (kernel);
  free (params);
  XRenderFreePicture (dpy, src);
  XRenderFreePicture (dpy, dst);
}

static Picture
create_xrender_mask (Display *dpy, Drawable drawable, Bool argb)
{
  Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);

  XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8);
  XRenderPictureAttributes pa;
  pa.repeat = True;
  Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa);

  XFreePixmap (dpy, pixmap);

  return mask;
}

void
rxvt_img::brightness (double r, double g, double b, double a)
{
  Display *dpy = s->display->dpy;
  Picture src = create_xrender_mask (dpy, pm, True);
  Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);

  XRenderColor mask_c;
  mask_c.red   = float_to_component (r);
  mask_c.green = float_to_component (g);
  mask_c.blue  = float_to_component (b);
  mask_c.alpha = float_to_component (a);
  XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);

  XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
}

void
rxvt_img::contrast (double r, double g, double b, double a)
{
  if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL))
    return;

  Display *dpy = s->display->dpy;
  Picture src = create_xrender_mask (dpy, pm, True);
  Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);

  XRenderColor mask_c;
  mask_c.red   = float_to_component (r);
  mask_c.green = float_to_component (g);
  mask_c.blue  = float_to_component (b);
  mask_c.alpha = float_to_component (a);
  XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);

  XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
}

void
rxvt_img::render (GdkPixbuf *pixbuf, int src_x, int src_y, int width, int height, int dst_x, int dst_y)
{
  //TODO
}

rxvt_img *
rxvt_img::copy ()
{
  GC gc = XCreateGC (s->display->dpy, pm, 0, 0);
  Pixmap pm2 = XCreatePixmap (s->display->dpy, pm, w, h, format->depth);
  XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, w, h, 0, 0);
  XFreeGC (s->display->dpy, gc);
  return new rxvt_img (s, format, w, h, pm2);
}

rxvt_img *
rxvt_img::transform (int new_width, int new_height, double matrix[16])
{
  //TODO
}

rxvt_img *
rxvt_img::scale (int new_width, int new_height)
{
  // use transform
  //TODO
}

rxvt_img *
rxvt_img::convert_to (XRenderPictFormat *new_format)
{
  rxvt_img *img = new rxvt_img (s,new_format,w, h);

  Display *dpy = s->display->dpy;
  Picture src = XRenderCreatePicture (dpy, pm, format, 0, 0);
  Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);

  XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);

  XRenderFreePicture (dpy, src);
  XRenderFreePicture (dpy, dst);

  return img;
}

#endif

Revision:	1.9
Committed:	Sun Jun 3 20:47:00 2012 UTC (11 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.8:	+2 -1 lines
Log Message:	* empty log message *
#	Content
1	#include <math.h>
2	#include "../config.h"
3	#include "rxvt.h"
4
5	#if HAVE_IMG
6
7	#define float_to_component(d) ((d) * 65535.99)
8
9	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int width, int height)
10	: s(screen), w(width), h(height), format(format), shared(false)
11	{
12	pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
13	}
14
15	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int width, int height, Pixmap pixmap)
16	: s(screen), pm(pixmap), w(width), h(height), format(format), shared(false)
17	{
18	}
19
20	rxvt_img *
21	rxvt_img::new_from_file (rxvt_screen s, const char filename)
22	{
23	GError *err;
24	GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
25
26	if (!pb)
27	return 0;
28
29	rxvt_img *img = new rxvt_img (
30	s,
31	XRenderFindStandardFormat (s->display->dpy, gdk_pixbuf_get_has_alpha (pb) ? PictStandardARGB32 : PictStandardRGB24),
32	gdk_pixbuf_get_width (pb),
33	gdk_pixbuf_get_height (pb)
34	);
35
36	img->render (pb, 0, 0, img->w, img->h, 0, 0);
37
38	return img;
39	}
40
41	rxvt_img::~rxvt_img ()
42	{
43	if (!shared)
44	XFreePixmap (s->display->dpy, pm);
45	}
46
47	void
48	rxvt_img::fill (const rxvt_color &c)
49	{
50	XGCValues gcv;
51	gcv.foreground = c;
52	GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv);
53	XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h);
54	XFreeGC (s->display->dpy, gc);
55	}
56
57	static void
58	get_gaussian_kernel (int radius, int width, double kernel, XFixed params)
59	{
60	double sigma = radius / 2.0;
61	double scale = sqrt (2.0 * M_PI) * sigma;
62	double sum = 0.0;
63
64	for (int i = 0; i < width; i++)
65	{
66	double x = i - width / 2;
67	kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
68	sum += kernel[i];
69	}
70
71	params[0] = XDoubleToFixed (width);
72	params[1] = XDoubleToFixed (1);
73
74	for (int i = 0; i < width; i++)
75	params[i+2] = XDoubleToFixed (kernel[i] / sum);
76	}
77
78	void
79	rxvt_img::blur (int rh, int rv)
80	{
81	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
82	return;
83
84	Display *dpy = s->display->dpy;
85	int size = max (rh, rv) * 2 + 1;
86	double kernel = (double )malloc (size * sizeof (double));
87	XFixed params = (XFixed )malloc ((size + 2) * sizeof (XFixed));
88
89	XRenderPictureAttributes pa;
90
91	pa.repeat = RepeatPad;
92	Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
93	Pixmap tmp = XCreatePixmap (dpy, pm, w, h, format->depth);
94	Picture dst = XRenderCreatePicture (dpy, tmp, format, CPRepeat, &pa);
95	XFreePixmap (dpy, tmp);
96
97	if (kernel && params)
98	{
99	size = rh * 2 + 1;
100	get_gaussian_kernel (rh, size, kernel, params);
101
102	XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
103	XRenderComposite (dpy,
104	PictOpSrc,
105	src,
106	None,
107	dst,
108	0, 0,
109	0, 0,
110	0, 0,
111	w, h);
112
113	::swap (src, dst);
114
115	size = rv * 2 + 1;
116	get_gaussian_kernel (rv, size, kernel, params);
117	::swap (params[0], params[1]);
118
119	XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
120	XRenderComposite (dpy,
121	PictOpSrc,
122	src,
123	None,
124	dst,
125	0, 0,
126	0, 0,
127	0, 0,
128	w, h);
129	}
130
131	free (kernel);
132	free (params);
133	XRenderFreePicture (dpy, src);
134	XRenderFreePicture (dpy, dst);
135	}
136
137	static Picture
138	create_xrender_mask (Display *dpy, Drawable drawable, Bool argb)
139	{
140	Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);
141
142	XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8);
143	XRenderPictureAttributes pa;
144	pa.repeat = True;
145	Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa);
146
147	XFreePixmap (dpy, pixmap);
148
149	return mask;
150	}
151
152	void
153	rxvt_img::brightness (double r, double g, double b, double a)
154	{
155	Display *dpy = s->display->dpy;
156	Picture src = create_xrender_mask (dpy, pm, True);
157	Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
158
159	XRenderColor mask_c;
160	mask_c.red = float_to_component (r);
161	mask_c.green = float_to_component (g);
162	mask_c.blue = float_to_component (b);
163	mask_c.alpha = float_to_component (a);
164	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
165
166	XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
167	}
168
169	void
170	rxvt_img::contrast (double r, double g, double b, double a)
171	{
172	if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL))
173	return;
174
175	Display *dpy = s->display->dpy;
176	Picture src = create_xrender_mask (dpy, pm, True);
177	Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
178
179	XRenderColor mask_c;
180	mask_c.red = float_to_component (r);
181	mask_c.green = float_to_component (g);
182	mask_c.blue = float_to_component (b);
183	mask_c.alpha = float_to_component (a);
184	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
185
186	XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
187	}
188
189	void
190	rxvt_img::render (GdkPixbuf *pixbuf, int src_x, int src_y, int width, int height, int dst_x, int dst_y)
191	{
192	//TODO
193	}
194
195	rxvt_img *
196	rxvt_img::copy ()
197	{
198	GC gc = XCreateGC (s->display->dpy, pm, 0, 0);
199	Pixmap pm2 = XCreatePixmap (s->display->dpy, pm, w, h, format->depth);
200	XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, w, h, 0, 0);
201	XFreeGC (s->display->dpy, gc);
202	return new rxvt_img (s, format, w, h, pm2);
203	}
204
205	rxvt_img *
206	rxvt_img::transform (int new_width, int new_height, double matrix[16])
207	{
208	//TODO
209	}
210
211	rxvt_img *
212	rxvt_img::scale (int new_width, int new_height)
213	{
214	// use transform
215	//TODO
216	}
217
218	rxvt_img *
219	rxvt_img::convert_to (XRenderPictFormat *new_format)
220	{
221	rxvt_img *img = new rxvt_img (s,new_format,w, h);
222
223	Display *dpy = s->display->dpy;
224	Picture src = XRenderCreatePicture (dpy, pm, format, 0, 0);
225	Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
226
227	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
228
229	XRenderFreePicture (dpy, src);
230	XRenderFreePicture (dpy, dst);
231
232	return img;
233	}
234
235	#endif
236