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 = 0;
  GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);

  if (!pb)
    rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);

  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::unshare ()
{
  if (!shared)
    return;

  rxvt_img *img = clone ();

  ::swap (pm    , img->pm);
  ::swap (shared, img->shared);

  delete img;
}

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::clone ()
{
  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, int repeat, double matrix[9])
{
  //TODO
}

rxvt_img *
rxvt_img::scale (int new_width, int new_height)
{
  double matrix[9] = {
    new_width  / (double)w, 0, 0,
    0, new_height / (double)h, 0,
    0,                      0, 1
  };

  return transform (new_width, new_height, RepeatNormal, matrix);
}

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:	1.11
Committed:	Mon Jun 4 15:15:49 2012 UTC (14 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.10:	+25 -6 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	sf-exg	1.6	#include <math.h>
2	root	1.1	#include "../config.h"
3			#include "rxvt.h"
4
5			#if HAVE_IMG
6
7	sf-exg	1.6	#define float_to_component(d) ((d) * 65535.99)
8
9	root	1.3	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int width, int height)
10	root	1.4	: s(screen), w(width), h(height), format(format), shared(false)
11	root	1.1	{
12	root	1.3	pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
13	root	1.1	}
14
15	root	1.3	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int width, int height, Pixmap pixmap)
16	root	1.4	: s(screen), pm(pixmap), w(width), h(height), format(format), shared(false)
17	root	1.1	{
18			}
19
20	root	1.4	rxvt_img *
21			rxvt_img::new_from_file (rxvt_screen s, const char filename)
22			{
23	root	1.11	GError *err = 0;
24	root	1.4	GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
25
26			if (!pb)
27	root	1.11	rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
28	root	1.4
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	root	1.5	img->render (pb, 0, 0, img->w, img->h, 0, 0);
37	root	1.4
38			return img;
39			}
40
41	root	1.1	rxvt_img::~rxvt_img ()
42			{
43	root	1.4	if (!shared)
44	root	1.1	XFreePixmap (s->display->dpy, pm);
45			}
46
47			void
48	root	1.11	rxvt_img::unshare ()
49			{
50			if (!shared)
51			return;
52
53			rxvt_img *img = clone ();
54
55			::swap (pm , img->pm);
56			::swap (shared, img->shared);
57
58			delete img;
59			}
60
61			void
62	root	1.1	rxvt_img::fill (const rxvt_color &c)
63			{
64			XGCValues gcv;
65			gcv.foreground = c;
66			GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv);
67			XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h);
68	root	1.3	XFreeGC (s->display->dpy, gc);
69	root	1.1	}
70
71	sf-exg	1.6	static void
72			get_gaussian_kernel (int radius, int width, double kernel, XFixed params)
73			{
74			double sigma = radius / 2.0;
75			double scale = sqrt (2.0 * M_PI) * sigma;
76			double sum = 0.0;
77
78			for (int i = 0; i < width; i++)
79			{
80			double x = i - width / 2;
81			kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
82			sum += kernel[i];
83			}
84
85			params[0] = XDoubleToFixed (width);
86			params[1] = XDoubleToFixed (1);
87
88			for (int i = 0; i < width; i++)
89			params[i+2] = XDoubleToFixed (kernel[i] / sum);
90			}
91
92	root	1.3	void
93			rxvt_img::blur (int rh, int rv)
94			{
95	sf-exg	1.6	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
96			return;
97
98			Display *dpy = s->display->dpy;
99			int size = max (rh, rv) * 2 + 1;
100			double kernel = (double )malloc (size * sizeof (double));
101			XFixed params = (XFixed )malloc ((size + 2) * sizeof (XFixed));
102
103			XRenderPictureAttributes pa;
104
105			pa.repeat = RepeatPad;
106			Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
107			Pixmap tmp = XCreatePixmap (dpy, pm, w, h, format->depth);
108			Picture dst = XRenderCreatePicture (dpy, tmp, format, CPRepeat, &pa);
109			XFreePixmap (dpy, tmp);
110
111			if (kernel && params)
112			{
113			size = rh * 2 + 1;
114			get_gaussian_kernel (rh, size, kernel, params);
115
116			XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
117			XRenderComposite (dpy,
118			PictOpSrc,
119			src,
120			None,
121			dst,
122			0, 0,
123			0, 0,
124			0, 0,
125			w, h);
126
127			::swap (src, dst);
128
129			size = rv * 2 + 1;
130			get_gaussian_kernel (rv, size, kernel, params);
131			::swap (params[0], params[1]);
132
133			XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
134			XRenderComposite (dpy,
135			PictOpSrc,
136			src,
137			None,
138			dst,
139			0, 0,
140			0, 0,
141			0, 0,
142			w, h);
143			}
144
145			free (kernel);
146			free (params);
147			XRenderFreePicture (dpy, src);
148			XRenderFreePicture (dpy, dst);
149			}
150
151			static Picture
152			create_xrender_mask (Display *dpy, Drawable drawable, Bool argb)
153			{
154			Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);
155
156			XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8);
157			XRenderPictureAttributes pa;
158			pa.repeat = True;
159			Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa);
160
161			XFreePixmap (dpy, pixmap);
162
163			return mask;
164	root	1.3	}
165
166			void
167			rxvt_img::brightness (double r, double g, double b, double a)
168			{
169	sf-exg	1.6	Display *dpy = s->display->dpy;
170			Picture src = create_xrender_mask (dpy, pm, True);
171			Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
172
173			XRenderColor mask_c;
174			mask_c.red = float_to_component (r);
175			mask_c.green = float_to_component (g);
176			mask_c.blue = float_to_component (b);
177			mask_c.alpha = float_to_component (a);
178			XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
179
180			XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
181	root	1.3	}
182
183			void
184			rxvt_img::contrast (double r, double g, double b, double a)
185	root	1.1	{
186	sf-exg	1.6	if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL))
187			return;
188
189			Display *dpy = s->display->dpy;
190			Picture src = create_xrender_mask (dpy, pm, True);
191			Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
192
193			XRenderColor mask_c;
194			mask_c.red = float_to_component (r);
195			mask_c.green = float_to_component (g);
196			mask_c.blue = float_to_component (b);
197			mask_c.alpha = float_to_component (a);
198			XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
199
200			XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
201	root	1.1	}
202
203	root	1.3	void
204			rxvt_img::render (GdkPixbuf *pixbuf, int src_x, int src_y, int width, int height, int dst_x, int dst_y)
205			{
206			//TODO
207			}
208
209			rxvt_img *
210	root	1.11	rxvt_img::clone ()
211	root	1.3	{
212			GC gc = XCreateGC (s->display->dpy, pm, 0, 0);
213			Pixmap pm2 = XCreatePixmap (s->display->dpy, pm, w, h, format->depth);
214			XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, w, h, 0, 0);
215			XFreeGC (s->display->dpy, gc);
216			return new rxvt_img (s, format, w, h, pm2);
217			}
218
219			rxvt_img *
220	root	1.11	rxvt_img::transform (int new_width, int new_height, int repeat, double matrix[9])
221	root	1.3	{
222			//TODO
223			}
224
225			rxvt_img *
226			rxvt_img::scale (int new_width, int new_height)
227			{
228	root	1.11	double matrix[9] = {
229			new_width / (double)w, 0, 0,
230			0, new_height / (double)h, 0,
231			0, 0, 1
232			};
233
234			return transform (new_width, new_height, RepeatNormal, matrix);
235	root	1.3	}
236
237	sf-exg	1.7	rxvt_img *
238			rxvt_img::convert_to (XRenderPictFormat *new_format)
239			{
240	sf-exg	1.10	rxvt_img *img = new rxvt_img (s, new_format, w, h);
241	root	1.9
242	sf-exg	1.7	Display *dpy = s->display->dpy;
243			Picture src = XRenderCreatePicture (dpy, pm, format, 0, 0);
244	root	1.8	Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
245	sf-exg	1.7
246			XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
247
248			XRenderFreePicture (dpy, src);
249			XRenderFreePicture (dpy, dst);
250
251			return img;
252			}
253	root	1.3
254	root	1.1	#endif
255