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;

  int byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;

  XImage xi;

  xi.width            = width;
  xi.height           = height;
  xi.xoffset          = 0;
  xi.format           = ZPixmap;
  xi.byte_order       = ImageByteOrder (dpy);
  xi.bitmap_unit      = 32;         //XY only, unused
  xi.bitmap_bit_order = LSBFirst;   //XY only, unused
  xi.bitmap_pad       = BitmapPad (dpy);
  xi.depth            = depth;
  xi.bytes_per_line   = 0;
  xi.bits_per_pixel   = 32;         //Z only
  xi.red_mask         = 0x00000000; //Z only, unused
  xi.green_mask       = 0x00000000; //Z only, unused
  xi.blue_mask        = 0x00000000; //Z only, unused
  xi.obdata           = 0;          // probably unused

  bool byte_order_mismatch = byte_order != xi.byte_order;

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

            if (byte_order_mismatch)
              v = ecb_bswap32 (v);

            *dst++ = v;
          }
      else
        for (int x = 0; x < width; x++)
          {
            uint32_t v = *(uint32_t *)src; src += 4;

            if (ecb_little_endian ())
              v = ecb_bswap32 (v);

            v = ecb_rotr32 (v, 8);

            if (byte_order_mismatch)
              v = ecb_bswap32 (v);

            *dst++ = 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:	1.54
Committed:	Thu Jun 7 20:24:39 2012 UTC (11 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.53:	+11 -1 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	root	1.54	int byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
77
78	root	1.47	XImage xi;
79
80			xi.width = width;
81			xi.height = height;
82			xi.xoffset = 0;
83			xi.format = ZPixmap;
84	root	1.54	xi.byte_order = ImageByteOrder (dpy);
85	root	1.51	xi.bitmap_unit = 32; //XY only, unused
86			xi.bitmap_bit_order = LSBFirst; //XY only, unused
87	root	1.48	xi.bitmap_pad = BitmapPad (dpy);
88	root	1.47	xi.depth = depth;
89			xi.bytes_per_line = 0;
90	root	1.51	xi.bits_per_pixel = 32; //Z only
91	root	1.52	xi.red_mask = 0x00000000; //Z only, unused
92			xi.green_mask = 0x00000000; //Z only, unused
93			xi.blue_mask = 0x00000000; //Z only, unused
94			xi.obdata = 0; // probably unused
95	root	1.47
96	root	1.54	bool byte_order_mismatch = byte_order != xi.byte_order;
97
98	root	1.47	if (!XInitImage (&xi))
99			rxvt_fatal ("unable to initialise ximage, please report.\n");
100
101			if (height > INT_MAX / xi.bytes_per_line)
102			rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n");
103
104			xi.data = (char )rxvt_malloc (height xi.bytes_per_line);
105
106			int rowstride = gdk_pixbuf_get_rowstride (pb);
107
108			assert (3 + (depth == 32) == gdk_pixbuf_get_n_channels (pb));
109			unsigned char *row = gdk_pixbuf_get_pixels (pb);
110			char *line = xi.data;
111
112			for (int y = 0; y < height; y++)
113			{
114	root	1.50	unsigned char *src = row;
115			uint32_t dst = (uint32_t )line;
116	root	1.47
117			if (depth == 24)
118			for (int x = 0; x < width; x++)
119			{
120	root	1.50	uint8_t r = *src++;
121			uint8_t g = *src++;
122			uint8_t b = *src++;
123
124	root	1.53	uint32_t v = (r << 16) \| (g << 8) \| b;
125	root	1.50
126			if (ecb_big_endian ())
127			v = ecb_bswap32 (v);
128
129	root	1.54	if (byte_order_mismatch)
130			v = ecb_bswap32 (v);
131
132	root	1.51	*dst++ = v;
133	root	1.47	}
134			else
135			for (int x = 0; x < width; x++)
136			{
137	root	1.50	uint32_t v = (uint32_t )src; src += 4;
138	root	1.51
139	root	1.52	if (ecb_little_endian ())
140	root	1.51	v = ecb_bswap32 (v);
141
142	root	1.52	v = ecb_rotr32 (v, 8);
143
144	root	1.54	if (byte_order_mismatch)
145			v = ecb_bswap32 (v);
146
147	root	1.51	*dst++ = v;
148	root	1.47	}
149
150			row += rowstride;
151	root	1.50	line += xi.bytes_per_line;
152	root	1.47	}
153
154			rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, depth == 24 ? PictStandardRGB24 : PictStandardARGB32), 0, 0, width, height);
155			img->alloc ();
156
157			GC gc = XCreateGC (dpy, img->pm, 0, 0);
158			XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);
159			XFreeGC (dpy, gc);
160
161			free (xi.data);
162
163			return img;
164			}
165
166			rxvt_img *
167	root	1.4	rxvt_img::new_from_file (rxvt_screen s, const char filename)
168			{
169	root	1.11	GError *err = 0;
170	root	1.4	GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
171
172			if (!pb)
173	root	1.11	rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
174	root	1.4
175	root	1.47	rxvt_img *img = new_from_pixbuf (s, pb);
176	root	1.4
177	sf-exg	1.26	g_object_unref (pb);
178
179	root	1.4	return img;
180			}
181
182	root	1.32	void
183			rxvt_img::destroy ()
184			{
185	root	1.34	if (--ref->cnt)
186	root	1.32	return;
187
188	root	1.34	if (pm && ref->ours)
189	root	1.32	XFreePixmap (s->display->dpy, pm);
190
191	root	1.34	delete ref;
192	root	1.32	}
193
194	root	1.1	rxvt_img::~rxvt_img ()
195			{
196	root	1.32	destroy ();
197			}
198
199			void
200			rxvt_img::alloc ()
201			{
202			pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
203	root	1.34	ref = new pixref (w, h);
204			}
205
206			Picture
207			rxvt_img::src_picture ()
208			{
209			Display *dpy = s->display->dpy;
210
211			XRenderPictureAttributes pa;
212			pa.repeat = repeat;
213			Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
214
215			return pic;
216	root	1.1	}
217
218			void
219	root	1.11	rxvt_img::unshare ()
220			{
221	root	1.34	if (ref->cnt == 1 && ref->ours)
222	root	1.11	return;
223
224	root	1.34	//TODO: maybe should reify instead
225			Pixmap pm2 = XCreatePixmap (s->display->dpy, s->display->root, ref->w, ref->h, format->depth);
226	root	1.32	GC gc = XCreateGC (s->display->dpy, pm, 0, 0);
227	root	1.34	XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
228	root	1.32	XFreeGC (s->display->dpy, gc);
229	root	1.11
230	root	1.32	destroy ();
231	root	1.11
232	root	1.32	pm = pm2;
233	root	1.34	ref = new pixref (ref->w, ref->h);
234	root	1.11	}
235
236			void
237	root	1.1	rxvt_img::fill (const rxvt_color &c)
238			{
239			XGCValues gcv;
240			gcv.foreground = c;
241			GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv);
242			XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h);
243	root	1.3	XFreeGC (s->display->dpy, gc);
244	root	1.1	}
245
246	sf-exg	1.6	static void
247			get_gaussian_kernel (int radius, int width, double kernel, XFixed params)
248			{
249			double sigma = radius / 2.0;
250			double scale = sqrt (2.0 * M_PI) * sigma;
251			double sum = 0.0;
252
253			for (int i = 0; i < width; i++)
254			{
255			double x = i - width / 2;
256			kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
257			sum += kernel[i];
258			}
259
260			params[0] = XDoubleToFixed (width);
261			params[1] = XDoubleToFixed (1);
262
263			for (int i = 0; i < width; i++)
264			params[i+2] = XDoubleToFixed (kernel[i] / sum);
265			}
266
267	sf-exg	1.22	rxvt_img *
268	root	1.3	rxvt_img::blur (int rh, int rv)
269			{
270	sf-exg	1.6	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
271	sf-exg	1.22	return clone ();
272	sf-exg	1.6
273			Display *dpy = s->display->dpy;
274			int size = max (rh, rv) * 2 + 1;
275			double kernel = (double )malloc (size * sizeof (double));
276			XFixed params = (XFixed )malloc ((size + 2) * sizeof (XFixed));
277	root	1.41	rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
278	root	1.32	img->alloc ();
279	sf-exg	1.6
280	root	1.34	Picture src = src_picture ();
281
282	sf-exg	1.6	XRenderPictureAttributes pa;
283			pa.repeat = RepeatPad;
284	sf-exg	1.22	Picture dst = XRenderCreatePicture (dpy, img->pm, format, CPRepeat, &pa);
285
286			Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);
287			Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);
288			XFreePixmap (dpy, tmp_pm);
289	sf-exg	1.6
290			if (kernel && params)
291			{
292			size = rh * 2 + 1;
293			get_gaussian_kernel (rh, size, kernel, params);
294
295			XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
296			XRenderComposite (dpy,
297			PictOpSrc,
298			src,
299			None,
300	sf-exg	1.22	tmp,
301	sf-exg	1.6	0, 0,
302			0, 0,
303			0, 0,
304			w, h);
305
306			size = rv * 2 + 1;
307			get_gaussian_kernel (rv, size, kernel, params);
308			::swap (params[0], params[1]);
309
310			XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
311			XRenderComposite (dpy,
312			PictOpSrc,
313	sf-exg	1.22	tmp,
314	sf-exg	1.6	None,
315			dst,
316			0, 0,
317			0, 0,
318			0, 0,
319			w, h);
320			}
321
322			free (kernel);
323			free (params);
324			XRenderFreePicture (dpy, src);
325			XRenderFreePicture (dpy, dst);
326	sf-exg	1.22	XRenderFreePicture (dpy, tmp);
327
328			return img;
329	sf-exg	1.6	}
330
331			static Picture
332			create_xrender_mask (Display *dpy, Drawable drawable, Bool argb)
333			{
334			Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);
335
336			XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8);
337			XRenderPictureAttributes pa;
338			pa.repeat = True;
339			Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa);
340
341			XFreePixmap (dpy, pixmap);
342
343			return mask;
344	root	1.3	}
345
346			void
347	sf-exg	1.31	rxvt_img::brightness (unsigned short r, unsigned short g, unsigned short b, unsigned short a)
348	root	1.3	{
349	sf-exg	1.6	Display *dpy = s->display->dpy;
350			Picture src = create_xrender_mask (dpy, pm, True);
351			Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
352
353			XRenderColor mask_c;
354	sf-exg	1.31	mask_c.red = r;
355			mask_c.green = g;
356			mask_c.blue = b;
357			mask_c.alpha = a;
358	sf-exg	1.6	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
359
360			XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
361	sf-exg	1.23
362			XRenderFreePicture (dpy, src);
363			XRenderFreePicture (dpy, dst);
364	root	1.3	}
365
366			void
367	sf-exg	1.31	rxvt_img::contrast (unsigned short r, unsigned short g, unsigned short b, unsigned short a)
368	root	1.1	{
369	sf-exg	1.6	if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL))
370			return;
371
372			Display *dpy = s->display->dpy;
373			Picture src = create_xrender_mask (dpy, pm, True);
374			Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
375
376			XRenderColor mask_c;
377	sf-exg	1.31	mask_c.red = r;
378			mask_c.green = g;
379			mask_c.blue = b;
380			mask_c.alpha = a;
381	sf-exg	1.6	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
382
383			XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
384	sf-exg	1.23
385			XRenderFreePicture (dpy, src);
386			XRenderFreePicture (dpy, dst);
387	root	1.1	}
388
389	root	1.3	rxvt_img *
390	root	1.11	rxvt_img::clone ()
391	root	1.3	{
392	root	1.32	return new rxvt_img (*this);
393	root	1.3	}
394
395	root	1.46	static XRenderPictFormat *
396			find_alpha_format_for (Display dpy, XRenderPictFormat format)
397			{
398			if (format->direct.alphaMask)
399			return format; // already has alpha
400
401			// try to find a suitable alpha format, one bit alpha is enough for our purposes
402			if (format->type == PictTypeDirect)
403			for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
404			if (f->direct.alphaMask
405			&& f->type == PictTypeDirect
406			&& ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
407			&& ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
408			&& ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
409			return f;
410
411			// should be a very good fallback
412			return XRenderFindStandardFormat (dpy, PictStandardARGB32);
413			}
414
415	root	1.3	rxvt_img *
416	root	1.33	rxvt_img::reify ()
417	root	1.19	{
418	root	1.35	if (x == 0 && y == 0 && w == ref->w && h == ref->h)
419			return clone ();
420
421	root	1.40	Display *dpy = s->display->dpy;
422
423			bool alpha = !format->direct.alphaMask
424			&& (x \|\| y)
425			&& repeat == RepeatNone;
426
427	root	1.46	rxvt_img *img = new rxvt_img (s, alpha ? find_alpha_format_for (dpy, format) : format, 0, 0, w, h, repeat);
428	root	1.32	img->alloc ();
429	root	1.19
430	root	1.34	Picture src = src_picture ();
431			Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
432	root	1.33
433	root	1.42	if (alpha)
434			{
435			XRenderColor rc = { 0, 0, 0, 0 };
436	root	1.44	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
437	root	1.42	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, -x, -y, ref->w, ref->h);
438			}
439			else
440			XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, w, h);
441
442	root	1.33	XRenderFreePicture (dpy, src);
443			XRenderFreePicture (dpy, dst);
444	root	1.19
445	root	1.33	return img;
446			}
447	root	1.19
448	root	1.33	rxvt_img *
449			rxvt_img::sub_rect (int x, int y, int width, int height)
450			{
451			rxvt_img *img = clone ();
452
453			img->x += x;
454			img->y += y;
455	root	1.19
456	root	1.37	if (w != width \|\| h != height)
457			{
458			img->w = width;
459			img->h = height;
460
461	root	1.39	rxvt_img *img2 = img->reify ();
462			delete img;
463			img = img2;
464	root	1.37	}
465	root	1.36
466	root	1.19	return img;
467			}
468
469			rxvt_img *
470	root	1.30	rxvt_img::transform (int new_width, int new_height, double matrix[9])
471	root	1.3	{
472	root	1.41	rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height, repeat);
473	root	1.32	img->alloc ();
474	root	1.12
475			Display *dpy = s->display->dpy;
476	root	1.34	Picture src = src_picture ();
477			Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
478	root	1.12
479			XTransform xfrm;
480
481			for (int i = 0; i < 3; ++i)
482			for (int j = 0; j < 3; ++j)
483			xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]);
484
485	root	1.44	#if 0
486			xfrm.matrix [0][2] -= XDoubleToFixed (x);//TODO
487			xfrm.matrix [1][2] -= XDoubleToFixed (y);
488			#endif
489	root	1.33
490	root	1.17	XRenderSetPictureFilter (dpy, src, "good", 0, 0);
491	root	1.12	XRenderSetPictureTransform (dpy, src, &xfrm);
492			XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height);
493
494			XRenderFreePicture (dpy, src);
495			XRenderFreePicture (dpy, dst);
496
497			return img;
498	root	1.3	}
499
500			rxvt_img *
501			rxvt_img::scale (int new_width, int new_height)
502			{
503	sf-exg	1.43	if (w == new_width && h == new_height)
504			return clone ();
505
506	root	1.11	double matrix[9] = {
507	root	1.16	w / (double)new_width, 0, 0,
508			0, h / (double)new_height, 0,
509	root	1.11	0, 0, 1
510			};
511
512	root	1.42	int old_repeat_mode = repeat;
513			repeat = RepeatPad; // not right, but xrender can't proeprly scale it seems
514
515			rxvt_img *img = transform (new_width, new_height, matrix);
516
517			repeat = old_repeat_mode;
518			img->repeat = repeat;
519
520			return img;
521	root	1.3	}
522
523	sf-exg	1.7	rxvt_img *
524	root	1.30	rxvt_img::rotate (int new_width, int new_height, int x, int y, double phi)
525	root	1.17	{
526			double s = sin (phi);
527			double c = cos (phi);
528
529			double matrix[9] = {
530			c, -s, -c * x + s * y + x,
531			s, c, -s * x - c * y + y,
532			0, 0, 1
533			};
534
535	root	1.30	return transform (new_width, new_height, matrix);
536	root	1.17	}
537
538			rxvt_img *
539	root	1.45	rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg)
540	sf-exg	1.7	{
541	root	1.32	if (new_format == format)
542			return clone ();
543
544	root	1.45	rxvt_img *img = new rxvt_img (s, new_format, x, y, w, h, repeat);
545	root	1.32	img->alloc ();
546	root	1.9
547	sf-exg	1.7	Display *dpy = s->display->dpy;
548	root	1.34	Picture src = src_picture ();
549	root	1.8	Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
550	root	1.27	int op = PictOpSrc;
551	sf-exg	1.7
552	root	1.29	if (format->direct.alphaMask && !new_format->direct.alphaMask)
553	root	1.27	{
554			// does it have to be that complicated
555			rgba c;
556			bg.get (c);
557
558			XRenderColor rc = { c.r, c.g, c.b, 0xffff };
559	root	1.28	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);
560	root	1.27
561			op = PictOpOver;
562			}
563
564			XRenderComposite (dpy, op, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
565	sf-exg	1.7
566			XRenderFreePicture (dpy, src);
567			XRenderFreePicture (dpy, dst);
568
569			return img;
570			}
571	root	1.3
572	sf-exg	1.24	rxvt_img *
573			rxvt_img::blend (rxvt_img *img, double factor)
574			{
575			rxvt_img *img2 = clone ();
576			Display *dpy = s->display->dpy;
577	sf-exg	1.38	Picture src = img->src_picture ();
578	sf-exg	1.24	Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
579			Picture mask = create_xrender_mask (dpy, img->pm, False);
580
581			XRenderColor mask_c;
582
583			mask_c.alpha = float_to_component (factor);
584			mask_c.red =
585			mask_c.green =
586			mask_c.blue = 0;
587			XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);
588
589			XRenderComposite (dpy, PictOpOver, src, mask, dst, 0, 0, 0, 0, 0, 0, w, h);
590
591			XRenderFreePicture (dpy, src);
592			XRenderFreePicture (dpy, dst);
593			XRenderFreePicture (dpy, mask);
594
595			return img2;
596			}
597
598	root	1.1	#endif
599