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

  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 *src = row;
      uint32_t      *dst = (uint32_t *)line;

      if (depth == 24)
        for (int x = 0; x < width; x++)
          {
            uint8_t r = *src++;
            uint8_t g = *src++;
            uint8_t b = *src++;

            uint32_t v = r | (g << 8) | (b << 16);
            
            if (ecb_big_endian ())
              v = ecb_bswap32 (v);

            *dst++ = x;
          }
      else
        for (int x = 0; x < width; x++)
          {
            uint32_t v = *(uint32_t *)src; src += 4;
            v = ecb_big_endian () ? ecb_rotr32 (v, 8) : ecb_rotl32 (v, 8);
            *dst++ = ecb_bswap32 (v);
          }

      row += rowstride;
      line += xi.bytes_per_line;
    }

  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:	1.50
Committed:	Thu Jun 7 19:42:09 2012 UTC (11 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.49:	+19 -15 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	root	1.41	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	root	1.34	pm(0), ref(0)
10	root	1.1	{
11			}
12
13	root	1.32	rxvt_img::rxvt_img (const rxvt_img &img)
14	root	1.34	: 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	root	1.32	{
16	root	1.34	++ref->cnt;
17	root	1.32	}
18
19			#if 0
20	root	1.3	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int width, int height, Pixmap pixmap)
21	root	1.30	: s(screen), x(0), y(0), w(width), h(height), format(format), repeat(RepeatNormal), shared(false), pm(pixmap)
22	root	1.1	{
23			}
24	root	1.32	#endif
25	root	1.1
26	root	1.4	rxvt_img *
27	sf-exg	1.21	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	root	1.33	0,
49			0,
50	sf-exg	1.21	root_pm_w,
51	root	1.32	root_pm_h
52	sf-exg	1.21	);
53
54	root	1.32	img->pm = root_pixmap;
55	root	1.34	img->ref = new pixref (root_pm_w, root_pm_h);
56			img->ref->ours = false;
57	sf-exg	1.21
58			return img;
59			}
60
61			rxvt_img *
62	root	1.47	rxvt_img::new_from_pixbuf (rxvt_screen s, GdkPixbuf pb)
63			{
64	root	1.48	Display *dpy = s->display->dpy;
65
66	root	1.47	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	root	1.50	xi.byte_order = LSBFirst; // maybe go for host byte order, because servers are usually local?
83	root	1.47	xi.bitmap_unit = 32;
84	root	1.50	xi.bitmap_bit_order = LSBFirst;
85	root	1.48	xi.bitmap_pad = BitmapPad (dpy);
86	root	1.47	xi.depth = depth;
87			xi.bytes_per_line = 0;
88			xi.bits_per_pixel = 32;
89	root	1.50	xi.red_mask = 0x000000ff;
90	root	1.47	xi.green_mask = 0x0000ff00;
91	root	1.50	xi.blue_mask = 0x00ff0000;
92	root	1.47
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	root	1.50	unsigned char *src = row;
110			uint32_t dst = (uint32_t )line;
111	root	1.47
112			if (depth == 24)
113			for (int x = 0; x < width; x++)
114			{
115	root	1.50	uint8_t r = *src++;
116			uint8_t g = *src++;
117			uint8_t b = *src++;
118
119			uint32_t v = r \| (g << 8) \| (b << 16);
120
121			if (ecb_big_endian ())
122			v = ecb_bswap32 (v);
123
124			*dst++ = x;
125	root	1.47	}
126			else
127			for (int x = 0; x < width; x++)
128			{
129	root	1.50	uint32_t v = (uint32_t )src; src += 4;
130	root	1.48	v = ecb_big_endian () ? ecb_rotr32 (v, 8) : ecb_rotl32 (v, 8);
131	root	1.50	*dst++ = ecb_bswap32 (v);
132	root	1.47	}
133
134			row += rowstride;
135	root	1.50	line += xi.bytes_per_line;
136	root	1.47	}
137
138			rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, depth == 24 ? PictStandardRGB24 : PictStandardARGB32), 0, 0, width, height);
139			img->alloc ();
140
141			GC gc = XCreateGC (dpy, img->pm, 0, 0);
142			XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);
143			XFreeGC (dpy, gc);
144
145			free (xi.data);
146
147			return img;
148			}
149
150			rxvt_img *
151	root	1.4	rxvt_img::new_from_file (rxvt_screen s, const char filename)
152			{
153	root	1.11	GError *err = 0;
154	root	1.4	GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
155
156			if (!pb)
157	root	1.11	rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
158	root	1.4
159	root	1.47	rxvt_img *img = new_from_pixbuf (s, pb);
160	root	1.4
161	sf-exg	1.26	g_object_unref (pb);
162
163	root	1.4	return img;
164			}
165
166	root	1.32	void
167			rxvt_img::destroy ()
168			{
169	root	1.34	if (--ref->cnt)
170	root	1.32	return;
171
172	root	1.34	if (pm && ref->ours)
173	root	1.32	XFreePixmap (s->display->dpy, pm);
174
175	root	1.34	delete ref;
176	root	1.32	}
177
178	root	1.1	rxvt_img::~rxvt_img ()
179			{
180	root	1.32	destroy ();
181			}
182
183			void
184			rxvt_img::alloc ()
185			{
186			pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
187	root	1.34	ref = new pixref (w, h);
188			}
189
190			Picture
191			rxvt_img::src_picture ()
192			{
193			Display *dpy = s->display->dpy;
194
195			XRenderPictureAttributes pa;
196			pa.repeat = repeat;
197			Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
198
199			return pic;
200	root	1.1	}
201
202			void
203	root	1.11	rxvt_img::unshare ()
204			{
205	root	1.34	if (ref->cnt == 1 && ref->ours)
206	root	1.11	return;
207
208	root	1.34	//TODO: maybe should reify instead
209			Pixmap pm2 = XCreatePixmap (s->display->dpy, s->display->root, ref->w, ref->h, format->depth);
210	root	1.32	GC gc = XCreateGC (s->display->dpy, pm, 0, 0);
211	root	1.34	XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
212	root	1.32	XFreeGC (s->display->dpy, gc);
213	root	1.11
214	root	1.32	destroy ();
215	root	1.11
216	root	1.32	pm = pm2;
217	root	1.34	ref = new pixref (ref->w, ref->h);
218	root	1.11	}
219
220			void
221	root	1.1	rxvt_img::fill (const rxvt_color &c)
222			{
223			XGCValues gcv;
224			gcv.foreground = c;
225			GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv);
226			XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h);
227	root	1.3	XFreeGC (s->display->dpy, gc);
228	root	1.1	}
229
230	sf-exg	1.6	static void
231			get_gaussian_kernel (int radius, int width, double kernel, XFixed params)
232			{
233			double sigma = radius / 2.0;
234			double scale = sqrt (2.0 * M_PI) * sigma;
235			double sum = 0.0;
236
237			for (int i = 0; i < width; i++)
238			{
239			double x = i - width / 2;
240			kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
241			sum += kernel[i];
242			}
243
244			params[0] = XDoubleToFixed (width);
245			params[1] = XDoubleToFixed (1);
246
247			for (int i = 0; i < width; i++)
248			params[i+2] = XDoubleToFixed (kernel[i] / sum);
249			}
250
251	sf-exg	1.22	rxvt_img *
252	root	1.3	rxvt_img::blur (int rh, int rv)
253			{
254	sf-exg	1.6	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
255	sf-exg	1.22	return clone ();
256	sf-exg	1.6
257			Display *dpy = s->display->dpy;
258			int size = max (rh, rv) * 2 + 1;
259			double kernel = (double )malloc (size * sizeof (double));
260			XFixed params = (XFixed )malloc ((size + 2) * sizeof (XFixed));
261	root	1.41	rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
262	root	1.32	img->alloc ();
263	sf-exg	1.6
264	root	1.34	Picture src = src_picture ();
265
266	sf-exg	1.6	XRenderPictureAttributes pa;
267			pa.repeat = RepeatPad;
268	sf-exg	1.22	Picture dst = XRenderCreatePicture (dpy, img->pm, format, CPRepeat, &pa);
269
270			Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);
271			Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);
272			XFreePixmap (dpy, tmp_pm);
273	sf-exg	1.6
274			if (kernel && params)
275			{
276			size = rh * 2 + 1;
277			get_gaussian_kernel (rh, size, kernel, params);
278
279			XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
280			XRenderComposite (dpy,
281			PictOpSrc,
282			src,
283			None,
284	sf-exg	1.22	tmp,
285	sf-exg	1.6	0, 0,
286			0, 0,
287			0, 0,
288			w, h);
289
290			size = rv * 2 + 1;
291			get_gaussian_kernel (rv, size, kernel, params);
292			::swap (params[0], params[1]);
293
294			XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
295			XRenderComposite (dpy,
296			PictOpSrc,
297	sf-exg	1.22	tmp,
298	sf-exg	1.6	None,
299			dst,
300			0, 0,
301			0, 0,
302			0, 0,
303			w, h);
304			}
305
306			free (kernel);
307			free (params);
308			XRenderFreePicture (dpy, src);
309			XRenderFreePicture (dpy, dst);
310	sf-exg	1.22	XRenderFreePicture (dpy, tmp);
311
312			return img;
313	sf-exg	1.6	}
314
315			static Picture
316			create_xrender_mask (Display *dpy, Drawable drawable, Bool argb)
317			{
318			Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);
319
320			XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8);
321			XRenderPictureAttributes pa;
322			pa.repeat = True;
323			Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa);
324
325			XFreePixmap (dpy, pixmap);
326
327			return mask;
328	root	1.3	}
329
330			void
331	sf-exg	1.31	rxvt_img::brightness (unsigned short r, unsigned short g, unsigned short b, unsigned short a)
332	root	1.3	{
333	sf-exg	1.6	Display *dpy = s->display->dpy;
334			Picture src = create_xrender_mask (dpy, pm, True);
335			Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
336
337			XRenderColor mask_c;
338	sf-exg	1.31	mask_c.red = r;
339			mask_c.green = g;
340			mask_c.blue = b;
341			mask_c.alpha = a;
342	sf-exg	1.6	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
343
344			XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
345	sf-exg	1.23
346			XRenderFreePicture (dpy, src);
347			XRenderFreePicture (dpy, dst);
348	root	1.3	}
349
350			void
351	sf-exg	1.31	rxvt_img::contrast (unsigned short r, unsigned short g, unsigned short b, unsigned short a)
352	root	1.1	{
353	sf-exg	1.6	if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL))
354			return;
355
356			Display *dpy = s->display->dpy;
357			Picture src = create_xrender_mask (dpy, pm, True);
358			Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
359
360			XRenderColor mask_c;
361	sf-exg	1.31	mask_c.red = r;
362			mask_c.green = g;
363			mask_c.blue = b;
364			mask_c.alpha = a;
365	sf-exg	1.6	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
366
367			XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
368	sf-exg	1.23
369			XRenderFreePicture (dpy, src);
370			XRenderFreePicture (dpy, dst);
371	root	1.1	}
372
373	root	1.3	rxvt_img *
374	root	1.11	rxvt_img::clone ()
375	root	1.3	{
376	root	1.32	return new rxvt_img (*this);
377	root	1.3	}
378
379	root	1.46	static XRenderPictFormat *
380			find_alpha_format_for (Display dpy, XRenderPictFormat format)
381			{
382			if (format->direct.alphaMask)
383			return format; // already has alpha
384
385			// try to find a suitable alpha format, one bit alpha is enough for our purposes
386			if (format->type == PictTypeDirect)
387			for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
388			if (f->direct.alphaMask
389			&& f->type == PictTypeDirect
390			&& ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
391			&& ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
392			&& ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
393			return f;
394
395			// should be a very good fallback
396			return XRenderFindStandardFormat (dpy, PictStandardARGB32);
397			}
398
399	root	1.3	rxvt_img *
400	root	1.33	rxvt_img::reify ()
401	root	1.19	{
402	root	1.35	if (x == 0 && y == 0 && w == ref->w && h == ref->h)
403			return clone ();
404
405	root	1.40	Display *dpy = s->display->dpy;
406
407			bool alpha = !format->direct.alphaMask
408			&& (x \|\| y)
409			&& repeat == RepeatNone;
410
411	root	1.46	rxvt_img *img = new rxvt_img (s, alpha ? find_alpha_format_for (dpy, format) : format, 0, 0, w, h, repeat);
412	root	1.32	img->alloc ();
413	root	1.19
414	root	1.34	Picture src = src_picture ();
415			Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
416	root	1.33
417	root	1.42	if (alpha)
418			{
419			XRenderColor rc = { 0, 0, 0, 0 };
420	root	1.44	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
421	root	1.42	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, -x, -y, ref->w, ref->h);
422			}
423			else
424			XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, w, h);
425
426	root	1.33	XRenderFreePicture (dpy, src);
427			XRenderFreePicture (dpy, dst);
428	root	1.19
429	root	1.33	return img;
430			}
431	root	1.19
432	root	1.33	rxvt_img *
433			rxvt_img::sub_rect (int x, int y, int width, int height)
434			{
435			rxvt_img *img = clone ();
436
437			img->x += x;
438			img->y += y;
439	root	1.19
440	root	1.37	if (w != width \|\| h != height)
441			{
442			img->w = width;
443			img->h = height;
444
445	root	1.39	rxvt_img *img2 = img->reify ();
446			delete img;
447			img = img2;
448	root	1.37	}
449	root	1.36
450	root	1.19	return img;
451			}
452
453			rxvt_img *
454	root	1.30	rxvt_img::transform (int new_width, int new_height, double matrix[9])
455	root	1.3	{
456	root	1.41	rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height, repeat);
457	root	1.32	img->alloc ();
458	root	1.12
459			Display *dpy = s->display->dpy;
460	root	1.34	Picture src = src_picture ();
461			Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
462	root	1.12
463			XTransform xfrm;
464
465			for (int i = 0; i < 3; ++i)
466			for (int j = 0; j < 3; ++j)
467			xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]);
468
469	root	1.44	#if 0
470			xfrm.matrix [0][2] -= XDoubleToFixed (x);//TODO
471			xfrm.matrix [1][2] -= XDoubleToFixed (y);
472			#endif
473	root	1.33
474	root	1.17	XRenderSetPictureFilter (dpy, src, "good", 0, 0);
475	root	1.12	XRenderSetPictureTransform (dpy, src, &xfrm);
476			XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height);
477
478			XRenderFreePicture (dpy, src);
479			XRenderFreePicture (dpy, dst);
480
481			return img;
482	root	1.3	}
483
484			rxvt_img *
485			rxvt_img::scale (int new_width, int new_height)
486			{
487	sf-exg	1.43	if (w == new_width && h == new_height)
488			return clone ();
489
490	root	1.11	double matrix[9] = {
491	root	1.16	w / (double)new_width, 0, 0,
492			0, h / (double)new_height, 0,
493	root	1.11	0, 0, 1
494			};
495
496	root	1.42	int old_repeat_mode = repeat;
497			repeat = RepeatPad; // not right, but xrender can't proeprly scale it seems
498
499			rxvt_img *img = transform (new_width, new_height, matrix);
500
501			repeat = old_repeat_mode;
502			img->repeat = repeat;
503
504			return img;
505	root	1.3	}
506
507	sf-exg	1.7	rxvt_img *
508	root	1.30	rxvt_img::rotate (int new_width, int new_height, int x, int y, double phi)
509	root	1.17	{
510			double s = sin (phi);
511			double c = cos (phi);
512
513			double matrix[9] = {
514			c, -s, -c * x + s * y + x,
515			s, c, -s * x - c * y + y,
516			0, 0, 1
517			};
518
519	root	1.30	return transform (new_width, new_height, matrix);
520	root	1.17	}
521
522			rxvt_img *
523	root	1.45	rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg)
524	sf-exg	1.7	{
525	root	1.32	if (new_format == format)
526			return clone ();
527
528	root	1.45	rxvt_img *img = new rxvt_img (s, new_format, x, y, w, h, repeat);
529	root	1.32	img->alloc ();
530	root	1.9
531	sf-exg	1.7	Display *dpy = s->display->dpy;
532	root	1.34	Picture src = src_picture ();
533	root	1.8	Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
534	root	1.27	int op = PictOpSrc;
535	sf-exg	1.7
536	root	1.29	if (format->direct.alphaMask && !new_format->direct.alphaMask)
537	root	1.27	{
538			// does it have to be that complicated
539			rgba c;
540			bg.get (c);
541
542			XRenderColor rc = { c.r, c.g, c.b, 0xffff };
543	root	1.28	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);
544	root	1.27
545			op = PictOpOver;
546			}
547
548			XRenderComposite (dpy, op, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
549	sf-exg	1.7
550			XRenderFreePicture (dpy, src);
551			XRenderFreePicture (dpy, dst);
552
553			return img;
554			}
555	root	1.3
556	sf-exg	1.24	rxvt_img *
557			rxvt_img::blend (rxvt_img *img, double factor)
558			{
559			rxvt_img *img2 = clone ();
560			Display *dpy = s->display->dpy;
561	sf-exg	1.38	Picture src = img->src_picture ();
562	sf-exg	1.24	Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
563			Picture mask = create_xrender_mask (dpy, img->pm, False);
564
565			XRenderColor mask_c;
566
567			mask_c.alpha = float_to_component (factor);
568			mask_c.red =
569			mask_c.green =
570			mask_c.blue = 0;
571			XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);
572
573			XRenderComposite (dpy, PictOpOver, src, mask, dst, 0, 0, 0, 0, 0, 0, w, h);
574
575			XRenderFreePicture (dpy, src);
576			XRenderFreePicture (dpy, dst);
577			XRenderFreePicture (dpy, mask);
578
579			return img2;
580			}
581
582	root	1.1	#endif
583