rxvt-unicode/src/rxvtimg.C

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

#if HAVE_IMG

rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int x, int y, int width, int height, int repeat)
: s(screen), x(x), y(y), w(width), h(height), format(format), repeat(repeat),
  pm(0), ref(0)
{
}

rxvt_img::rxvt_img (const rxvt_img &img)
: s(img.s), x(img.x), y(img.y), w(img.w), h(img.h), format(img.format), repeat(img.repeat), pm(img.pm), ref(img.ref)
{
  ++ref->cnt;
}

#if 0
rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int width, int height, Pixmap pixmap)
: s(screen), x(0), y(0), w(width), h(height), format(format), repeat(RepeatNormal), shared(false), pm(pixmap)
{
}
#endif

rxvt_img *
rxvt_img::new_from_root (rxvt_screen *s)
{
  Display *dpy = s->display->dpy;
  unsigned int root_pm_w, root_pm_h;
  Pixmap root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_XROOTPMAP_ID]);
  if (root_pixmap == None)
    root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_ESETROOT_PMAP_ID]);

  if (root_pixmap == None)
    return 0;

  Window wdummy;
  int idummy;
  unsigned int udummy;

  if (!XGetGeometry (dpy, root_pixmap, &wdummy, &idummy, &idummy, &root_pm_w, &root_pm_h, &udummy, &udummy))
    return 0;

  rxvt_img *img = new rxvt_img (
     s,
     XRenderFindVisualFormat (dpy, DefaultVisual (dpy, s->display->screen)),
     0,
     0,
     root_pm_w,
     root_pm_h
  );

  img->pm = root_pixmap;
  img->ref = new pixref (root_pm_w, root_pm_h);
  img->ref->ours = false;

  return img;
}

rxvt_img *
rxvt_img::new_from_pixbuf (rxvt_screen *s, GdkPixbuf *pb)
{
  Display *dpy = s->display->dpy;

  int width  = gdk_pixbuf_get_width  (pb);
  int height = gdk_pixbuf_get_height (pb);

  if (width > 32767 || height > 32767) // well, we *could* upload in chunks
    rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n");

  // since we require rgb24/argb32 formats from xrender we assume
  // that both 24 and 32 bpp MUST be supported by any screen that supports xrender
  int depth = gdk_pixbuf_get_has_alpha (pb) ? 32 : 24;

  XImage xi;

  xi.width            = width;
  xi.height           = height;
  xi.xoffset          = 0;
  xi.format           = ZPixmap;
  xi.byte_order       = MSBFirst; // maybe go for host byte order, because servers are usually local?
  xi.bitmap_unit      = 32;
  xi.bitmap_bit_order = MSBFirst;
  xi.bitmap_pad       = BitmapPad (dpy);
  xi.depth            = depth;
  xi.bytes_per_line   = 0;
  xi.bits_per_pixel   = 32;
  xi.red_mask         = 0x00ff0000;
  xi.green_mask       = 0x0000ff00;
  xi.blue_mask        = 0x000000ff;

  if (!XInitImage (&xi))
    rxvt_fatal ("unable to initialise ximage, please report.\n");

  if (height > INT_MAX / xi.bytes_per_line)
    rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n");

  xi.data = (char *)rxvt_malloc (height * xi.bytes_per_line);

  int rowstride = gdk_pixbuf_get_rowstride (pb);

  assert (3 + (depth == 32) == gdk_pixbuf_get_n_channels (pb));
  unsigned char *row = gdk_pixbuf_get_pixels (pb);
  char *line = xi.data;

  for (int y = 0; y < height; y++)
    {
      unsigned char r, g, b, a;
      unsigned char *data = row;

      if (depth == 24)
        for (int x = 0; x < width; x++)
          {
            r = *data++;
            g = *data++;
            b = *data++;
            *line++ = 0;
            *line++ = r;
            *line++ = g;
            *line++ = b;
          }
      else
        for (int x = 0; x < width; x++)
          {
            uint32_t v = *(uint32_t *)data; data += 4;
            v = ecb_big_endian () ? ecb_rotr32 (v, 8) : ecb_rotl32 (v, 8);
            *(uint32_t *)line = x; line += 4;
          }

      row += rowstride;
    }

  rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, depth == 24 ? PictStandardRGB24 : PictStandardARGB32), 0, 0, width, height);
  img->alloc ();

  GC gc = XCreateGC (dpy, img->pm, 0, 0);
  XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);
  XFreeGC (dpy, gc);

  free (xi.data);

  return img;
}

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_from_pixbuf (s, pb);

  g_object_unref (pb);

  return img;
}

void
rxvt_img::destroy ()
{
  if (--ref->cnt)
    return;

  if (pm && ref->ours)
    XFreePixmap (s->display->dpy, pm);

  delete ref;
}

rxvt_img::~rxvt_img ()
{
  destroy ();
}

void
rxvt_img::alloc ()
{
  pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
  ref = new pixref (w, h);
}

Picture
rxvt_img::src_picture ()
{
  Display *dpy = s->display->dpy;

  XRenderPictureAttributes pa;
  pa.repeat = repeat;
  Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);

  return pic;
}

void
rxvt_img::unshare ()
{
  if (ref->cnt == 1 && ref->ours)
    return;

  //TODO: maybe should reify instead
  Pixmap pm2 = XCreatePixmap (s->display->dpy, s->display->root, ref->w, ref->h, format->depth);
  GC gc = XCreateGC (s->display->dpy, pm, 0, 0);
  XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
  XFreeGC (s->display->dpy, gc);

  destroy ();

  pm = pm2;
  ref = new pixref (ref->w, ref->h);
}

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);
}

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

  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));
  rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
  img->alloc ();

  Picture src = src_picture ();

  XRenderPictureAttributes pa;
  pa.repeat = RepeatPad;
  Picture dst = XRenderCreatePicture (dpy, img->pm, format, CPRepeat, &pa);

  Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);
  Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);
  XFreePixmap (dpy, tmp_pm);

  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,
                        tmp,
                        0, 0,
                        0, 0,
                        0, 0,
                        w, h);

      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,
                        tmp,
                        None,
                        dst,
                        0, 0,
                        0, 0,
                        0, 0,
                        w, h);
    }

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

  return img;
}

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 (unsigned short r, unsigned short g, unsigned short b, unsigned short 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   = r;
  mask_c.green = g;
  mask_c.blue  = b;
  mask_c.alpha = 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);

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

void
rxvt_img::contrast (unsigned short r, unsigned short g, unsigned short b, unsigned short 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   = r;
  mask_c.green = g;
  mask_c.blue  = b;
  mask_c.alpha = 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);

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

rxvt_img *
rxvt_img::clone ()
{
  return new rxvt_img (*this);
}

static XRenderPictFormat *
find_alpha_format_for (Display *dpy, XRenderPictFormat *format)
{
  if (format->direct.alphaMask)
    return format; // already has alpha

  // try to find a suitable alpha format, one bit alpha is enough for our purposes
  if (format->type == PictTypeDirect)
    for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
      if (f->direct.alphaMask
          && f->type == PictTypeDirect
          && ecb_popcount32 (f->direct.redMask  ) >= ecb_popcount32 (format->direct.redMask  )
          && ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
          && ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
        return f;

  // should be a very good fallback
  return XRenderFindStandardFormat (dpy, PictStandardARGB32);
}

rxvt_img *
rxvt_img::reify ()
{
  if (x == 0 && y == 0 && w == ref->w && h == ref->h)
    return clone ();

  Display *dpy = s->display->dpy;

  bool alpha = !format->direct.alphaMask
               && (x || y)
               && repeat == RepeatNone;

  rxvt_img *img = new rxvt_img (s, alpha ? find_alpha_format_for (dpy, format) : format, 0, 0, w, h, repeat);
  img->alloc ();

  Picture src = src_picture ();
  Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
  
  if (alpha)
    {
      XRenderColor rc = { 0, 0, 0, 0 };
      XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
      XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, -x, -y, ref->w, ref->h);
    }
  else
    XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, w, h);

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

  return img;
}

rxvt_img *
rxvt_img::sub_rect (int x, int y, int width, int height)
{
  rxvt_img *img = clone ();

  img->x += x;
  img->y += y;

  if (w != width || h != height)
    {
      img->w = width;
      img->h = height;

      rxvt_img *img2 = img->reify ();
      delete img;
      img = img2;
    }

  return img;
}

rxvt_img *
rxvt_img::transform (int new_width, int new_height, double matrix[9])
{
  rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height, repeat);
  img->alloc ();

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

  XTransform xfrm;

  for (int i = 0; i < 3; ++i)
    for (int j = 0; j < 3; ++j)
      xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]);

#if 0
  xfrm.matrix [0][2] -= XDoubleToFixed (x);//TODO
  xfrm.matrix [1][2] -= XDoubleToFixed (y);
#endif

  XRenderSetPictureFilter (dpy, src, "good", 0, 0);
  XRenderSetPictureTransform (dpy, src, &xfrm);
  XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height);

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

  return img;
}

rxvt_img *
rxvt_img::scale (int new_width, int new_height)
{
  if (w == new_width && h == new_height)
    return clone ();

  double matrix[9] = {
    w  / (double)new_width, 0, 0,
    0, h / (double)new_height, 0,
    0,                      0, 1
  };

  int old_repeat_mode = repeat;
  repeat = RepeatPad; // not right, but xrender can't proeprly scale it seems

  rxvt_img *img = transform (new_width, new_height, matrix);

  repeat = old_repeat_mode;
  img->repeat = repeat;

  return img;
}

rxvt_img *
rxvt_img::rotate (int new_width, int new_height, int x, int y, double phi)
{
  double s = sin (phi);
  double c = cos (phi);

  double matrix[9] = {
    c, -s, -c * x + s * y + x,
    s,  c, -s * x - c * y + y,
    0,  0,                  1
  };

  return transform (new_width, new_height, matrix);
}

rxvt_img *
rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg)
{
  if (new_format == format)
    return clone ();

  rxvt_img *img = new rxvt_img (s, new_format, x, y, w, h, repeat);
  img->alloc ();

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

  if (format->direct.alphaMask && !new_format->direct.alphaMask)
    {
      // does it have to be that complicated
      rgba c;
      bg.get (c);

      XRenderColor rc = { c.r, c.g, c.b, 0xffff };
      XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);

      op = PictOpOver;
    }

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

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

  return img;
}

rxvt_img *
rxvt_img::blend (rxvt_img *img, double factor)
{
  rxvt_img *img2 = clone ();
  Display *dpy = s->display->dpy;
  Picture src = img->src_picture ();
  Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
  Picture mask = create_xrender_mask (dpy, img->pm, False);

  XRenderColor mask_c;

  mask_c.alpha = float_to_component (factor);
  mask_c.red   =
  mask_c.green =
  mask_c.blue  = 0;
  XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);

  XRenderComposite (dpy, PictOpOver, src, mask, dst, 0, 0, 0, 0, 0, 0, w, h);

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

  return img2;
}

#endif

Revision:	1.49
Committed:	Thu Jun 7 19:24:13 2012 UTC (11 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.48:	+0 -2 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	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int x, int y, int width, int height, int repeat)
8	: s(screen), x(x), y(y), w(width), h(height), format(format), repeat(repeat),
9	pm(0), ref(0)
10	{
11	}
12
13	rxvt_img::rxvt_img (const rxvt_img &img)
14	: s(img.s), x(img.x), y(img.y), w(img.w), h(img.h), format(img.format), repeat(img.repeat), pm(img.pm), ref(img.ref)
15	{
16	++ref->cnt;
17	}
18
19	#if 0
20	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int width, int height, Pixmap pixmap)
21	: s(screen), x(0), y(0), w(width), h(height), format(format), repeat(RepeatNormal), shared(false), pm(pixmap)
22	{
23	}
24	#endif
25
26	rxvt_img *
27	rxvt_img::new_from_root (rxvt_screen *s)
28	{
29	Display *dpy = s->display->dpy;
30	unsigned int root_pm_w, root_pm_h;
31	Pixmap root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_XROOTPMAP_ID]);
32	if (root_pixmap == None)
33	root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_ESETROOT_PMAP_ID]);
34
35	if (root_pixmap == None)
36	return 0;
37
38	Window wdummy;
39	int idummy;
40	unsigned int udummy;
41
42	if (!XGetGeometry (dpy, root_pixmap, &wdummy, &idummy, &idummy, &root_pm_w, &root_pm_h, &udummy, &udummy))
43	return 0;
44
45	rxvt_img *img = new rxvt_img (
46	s,
47	XRenderFindVisualFormat (dpy, DefaultVisual (dpy, s->display->screen)),
48	0,
49	0,
50	root_pm_w,
51	root_pm_h
52	);
53
54	img->pm = root_pixmap;
55	img->ref = new pixref (root_pm_w, root_pm_h);
56	img->ref->ours = false;
57
58	return img;
59	}
60
61	rxvt_img *
62	rxvt_img::new_from_pixbuf (rxvt_screen s, GdkPixbuf pb)
63	{
64	Display *dpy = s->display->dpy;
65
66	int width = gdk_pixbuf_get_width (pb);
67	int height = gdk_pixbuf_get_height (pb);
68
69	if (width > 32767 \|\| height > 32767) // well, we could upload in chunks
70	rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n");
71
72	// since we require rgb24/argb32 formats from xrender we assume
73	// that both 24 and 32 bpp MUST be supported by any screen that supports xrender
74	int depth = gdk_pixbuf_get_has_alpha (pb) ? 32 : 24;
75
76	XImage xi;
77
78	xi.width = width;
79	xi.height = height;
80	xi.xoffset = 0;
81	xi.format = ZPixmap;
82	xi.byte_order = MSBFirst; // maybe go for host byte order, because servers are usually local?
83	xi.bitmap_unit = 32;
84	xi.bitmap_bit_order = MSBFirst;
85	xi.bitmap_pad = BitmapPad (dpy);
86	xi.depth = depth;
87	xi.bytes_per_line = 0;
88	xi.bits_per_pixel = 32;
89	xi.red_mask = 0x00ff0000;
90	xi.green_mask = 0x0000ff00;
91	xi.blue_mask = 0x000000ff;
92
93	if (!XInitImage (&xi))
94	rxvt_fatal ("unable to initialise ximage, please report.\n");
95
96	if (height > INT_MAX / xi.bytes_per_line)
97	rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n");
98
99	xi.data = (char )rxvt_malloc (height xi.bytes_per_line);
100
101	int rowstride = gdk_pixbuf_get_rowstride (pb);
102
103	assert (3 + (depth == 32) == gdk_pixbuf_get_n_channels (pb));
104	unsigned char *row = gdk_pixbuf_get_pixels (pb);
105	char *line = xi.data;
106
107	for (int y = 0; y < height; y++)
108	{
109	unsigned char r, g, b, a;
110	unsigned char *data = row;
111
112	if (depth == 24)
113	for (int x = 0; x < width; x++)
114	{
115	r = *data++;
116	g = *data++;
117	b = *data++;
118	*line++ = 0;
119	*line++ = r;
120	*line++ = g;
121	*line++ = b;
122	}
123	else
124	for (int x = 0; x < width; x++)
125	{
126	uint32_t v = (uint32_t )data; data += 4;
127	v = ecb_big_endian () ? ecb_rotr32 (v, 8) : ecb_rotl32 (v, 8);
128	(uint32_t )line = x; line += 4;
129	}
130
131	row += rowstride;
132	}
133
134	rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, depth == 24 ? PictStandardRGB24 : PictStandardARGB32), 0, 0, width, height);
135	img->alloc ();
136
137	GC gc = XCreateGC (dpy, img->pm, 0, 0);
138	XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);
139	XFreeGC (dpy, gc);
140
141	free (xi.data);
142
143	return img;
144	}
145
146	rxvt_img *
147	rxvt_img::new_from_file (rxvt_screen s, const char filename)
148	{
149	GError *err = 0;
150	GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
151
152	if (!pb)
153	rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
154
155	rxvt_img *img = new_from_pixbuf (s, pb);
156
157	g_object_unref (pb);
158
159	return img;
160	}
161
162	void
163	rxvt_img::destroy ()
164	{
165	if (--ref->cnt)
166	return;
167
168	if (pm && ref->ours)
169	XFreePixmap (s->display->dpy, pm);
170
171	delete ref;
172	}
173
174	rxvt_img::~rxvt_img ()
175	{
176	destroy ();
177	}
178
179	void
180	rxvt_img::alloc ()
181	{
182	pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
183	ref = new pixref (w, h);
184	}
185
186	Picture
187	rxvt_img::src_picture ()
188	{
189	Display *dpy = s->display->dpy;
190
191	XRenderPictureAttributes pa;
192	pa.repeat = repeat;
193	Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
194
195	return pic;
196	}
197
198	void
199	rxvt_img::unshare ()
200	{
201	if (ref->cnt == 1 && ref->ours)
202	return;
203
204	//TODO: maybe should reify instead
205	Pixmap pm2 = XCreatePixmap (s->display->dpy, s->display->root, ref->w, ref->h, format->depth);
206	GC gc = XCreateGC (s->display->dpy, pm, 0, 0);
207	XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
208	XFreeGC (s->display->dpy, gc);
209
210	destroy ();
211
212	pm = pm2;
213	ref = new pixref (ref->w, ref->h);
214	}
215
216	void
217	rxvt_img::fill (const rxvt_color &c)
218	{
219	XGCValues gcv;
220	gcv.foreground = c;
221	GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv);
222	XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h);
223	XFreeGC (s->display->dpy, gc);
224	}
225
226	static void
227	get_gaussian_kernel (int radius, int width, double kernel, XFixed params)
228	{
229	double sigma = radius / 2.0;
230	double scale = sqrt (2.0 * M_PI) * sigma;
231	double sum = 0.0;
232
233	for (int i = 0; i < width; i++)
234	{
235	double x = i - width / 2;
236	kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
237	sum += kernel[i];
238	}
239
240	params[0] = XDoubleToFixed (width);
241	params[1] = XDoubleToFixed (1);
242
243	for (int i = 0; i < width; i++)
244	params[i+2] = XDoubleToFixed (kernel[i] / sum);
245	}
246
247	rxvt_img *
248	rxvt_img::blur (int rh, int rv)
249	{
250	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
251	return clone ();
252
253	Display *dpy = s->display->dpy;
254	int size = max (rh, rv) * 2 + 1;
255	double kernel = (double )malloc (size * sizeof (double));
256	XFixed params = (XFixed )malloc ((size + 2) * sizeof (XFixed));
257	rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
258	img->alloc ();
259
260	Picture src = src_picture ();
261
262	XRenderPictureAttributes pa;
263	pa.repeat = RepeatPad;
264	Picture dst = XRenderCreatePicture (dpy, img->pm, format, CPRepeat, &pa);
265
266	Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);
267	Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);
268	XFreePixmap (dpy, tmp_pm);
269
270	if (kernel && params)
271	{
272	size = rh * 2 + 1;
273	get_gaussian_kernel (rh, size, kernel, params);
274
275	XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
276	XRenderComposite (dpy,
277	PictOpSrc,
278	src,
279	None,
280	tmp,
281	0, 0,
282	0, 0,
283	0, 0,
284	w, h);
285
286	size = rv * 2 + 1;
287	get_gaussian_kernel (rv, size, kernel, params);
288	::swap (params[0], params[1]);
289
290	XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
291	XRenderComposite (dpy,
292	PictOpSrc,
293	tmp,
294	None,
295	dst,
296	0, 0,
297	0, 0,
298	0, 0,
299	w, h);
300	}
301
302	free (kernel);
303	free (params);
304	XRenderFreePicture (dpy, src);
305	XRenderFreePicture (dpy, dst);
306	XRenderFreePicture (dpy, tmp);
307
308	return img;
309	}
310
311	static Picture
312	create_xrender_mask (Display *dpy, Drawable drawable, Bool argb)
313	{
314	Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);
315
316	XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8);
317	XRenderPictureAttributes pa;
318	pa.repeat = True;
319	Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa);
320
321	XFreePixmap (dpy, pixmap);
322
323	return mask;
324	}
325
326	void
327	rxvt_img::brightness (unsigned short r, unsigned short g, unsigned short b, unsigned short a)
328	{
329	Display *dpy = s->display->dpy;
330	Picture src = create_xrender_mask (dpy, pm, True);
331	Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
332
333	XRenderColor mask_c;
334	mask_c.red = r;
335	mask_c.green = g;
336	mask_c.blue = b;
337	mask_c.alpha = a;
338	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
339
340	XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
341
342	XRenderFreePicture (dpy, src);
343	XRenderFreePicture (dpy, dst);
344	}
345
346	void
347	rxvt_img::contrast (unsigned short r, unsigned short g, unsigned short b, unsigned short a)
348	{
349	if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL))
350	return;
351
352	Display *dpy = s->display->dpy;
353	Picture src = create_xrender_mask (dpy, pm, True);
354	Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
355
356	XRenderColor mask_c;
357	mask_c.red = r;
358	mask_c.green = g;
359	mask_c.blue = b;
360	mask_c.alpha = a;
361	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
362
363	XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
364
365	XRenderFreePicture (dpy, src);
366	XRenderFreePicture (dpy, dst);
367	}
368
369	rxvt_img *
370	rxvt_img::clone ()
371	{
372	return new rxvt_img (*this);
373	}
374
375	static XRenderPictFormat *
376	find_alpha_format_for (Display dpy, XRenderPictFormat format)
377	{
378	if (format->direct.alphaMask)
379	return format; // already has alpha
380
381	// try to find a suitable alpha format, one bit alpha is enough for our purposes
382	if (format->type == PictTypeDirect)
383	for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
384	if (f->direct.alphaMask
385	&& f->type == PictTypeDirect
386	&& ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
387	&& ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
388	&& ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
389	return f;
390
391	// should be a very good fallback
392	return XRenderFindStandardFormat (dpy, PictStandardARGB32);
393	}
394
395	rxvt_img *
396	rxvt_img::reify ()
397	{
398	if (x == 0 && y == 0 && w == ref->w && h == ref->h)
399	return clone ();
400
401	Display *dpy = s->display->dpy;
402
403	bool alpha = !format->direct.alphaMask
404	&& (x \|\| y)
405	&& repeat == RepeatNone;
406
407	rxvt_img *img = new rxvt_img (s, alpha ? find_alpha_format_for (dpy, format) : format, 0, 0, w, h, repeat);
408	img->alloc ();
409
410	Picture src = src_picture ();
411	Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
412
413	if (alpha)
414	{
415	XRenderColor rc = { 0, 0, 0, 0 };
416	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
417	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, -x, -y, ref->w, ref->h);
418	}
419	else
420	XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, w, h);
421
422	XRenderFreePicture (dpy, src);
423	XRenderFreePicture (dpy, dst);
424
425	return img;
426	}
427
428	rxvt_img *
429	rxvt_img::sub_rect (int x, int y, int width, int height)
430	{
431	rxvt_img *img = clone ();
432
433	img->x += x;
434	img->y += y;
435
436	if (w != width \|\| h != height)
437	{
438	img->w = width;
439	img->h = height;
440
441	rxvt_img *img2 = img->reify ();
442	delete img;
443	img = img2;
444	}
445
446	return img;
447	}
448
449	rxvt_img *
450	rxvt_img::transform (int new_width, int new_height, double matrix[9])
451	{
452	rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height, repeat);
453	img->alloc ();
454
455	Display *dpy = s->display->dpy;
456	Picture src = src_picture ();
457	Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
458
459	XTransform xfrm;
460
461	for (int i = 0; i < 3; ++i)
462	for (int j = 0; j < 3; ++j)
463	xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]);
464
465	#if 0
466	xfrm.matrix [0][2] -= XDoubleToFixed (x);//TODO
467	xfrm.matrix [1][2] -= XDoubleToFixed (y);
468	#endif
469
470	XRenderSetPictureFilter (dpy, src, "good", 0, 0);
471	XRenderSetPictureTransform (dpy, src, &xfrm);
472	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height);
473
474	XRenderFreePicture (dpy, src);
475	XRenderFreePicture (dpy, dst);
476
477	return img;
478	}
479
480	rxvt_img *
481	rxvt_img::scale (int new_width, int new_height)
482	{
483	if (w == new_width && h == new_height)
484	return clone ();
485
486	double matrix[9] = {
487	w / (double)new_width, 0, 0,
488	0, h / (double)new_height, 0,
489	0, 0, 1
490	};
491
492	int old_repeat_mode = repeat;
493	repeat = RepeatPad; // not right, but xrender can't proeprly scale it seems
494
495	rxvt_img *img = transform (new_width, new_height, matrix);
496
497	repeat = old_repeat_mode;
498	img->repeat = repeat;
499
500	return img;
501	}
502
503	rxvt_img *
504	rxvt_img::rotate (int new_width, int new_height, int x, int y, double phi)
505	{
506	double s = sin (phi);
507	double c = cos (phi);
508
509	double matrix[9] = {
510	c, -s, -c * x + s * y + x,
511	s, c, -s * x - c * y + y,
512	0, 0, 1
513	};
514
515	return transform (new_width, new_height, matrix);
516	}
517
518	rxvt_img *
519	rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg)
520	{
521	if (new_format == format)
522	return clone ();
523
524	rxvt_img *img = new rxvt_img (s, new_format, x, y, w, h, repeat);
525	img->alloc ();
526
527	Display *dpy = s->display->dpy;
528	Picture src = src_picture ();
529	Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
530	int op = PictOpSrc;
531
532	if (format->direct.alphaMask && !new_format->direct.alphaMask)
533	{
534	// does it have to be that complicated
535	rgba c;
536	bg.get (c);
537
538	XRenderColor rc = { c.r, c.g, c.b, 0xffff };
539	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);
540
541	op = PictOpOver;
542	}
543
544	XRenderComposite (dpy, op, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
545
546	XRenderFreePicture (dpy, src);
547	XRenderFreePicture (dpy, dst);
548
549	return img;
550	}
551
552	rxvt_img *
553	rxvt_img::blend (rxvt_img *img, double factor)
554	{
555	rxvt_img *img2 = clone ();
556	Display *dpy = s->display->dpy;
557	Picture src = img->src_picture ();
558	Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
559	Picture mask = create_xrender_mask (dpy, img->pm, False);
560
561	XRenderColor mask_c;
562
563	mask_c.alpha = float_to_component (factor);
564	mask_c.red =
565	mask_c.green =
566	mask_c.blue = 0;
567	XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);
568
569	XRenderComposite (dpy, PictOpOver, src, mask, dst, 0, 0, 0, 0, 0, 0, w, h);
570
571	XRenderFreePicture (dpy, src);
572	XRenderFreePicture (dpy, dst);
573	XRenderFreePicture (dpy, mask);
574
575	return img2;
576	}
577
578	#endif
579