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;
}

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;
}

# if HAVE_PIXBUF
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 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      = 0;         //XY only, unused
  xi.bitmap_bit_order = 0;         //XY only, unused
  xi.bitmap_pad       = BitmapPad (dpy);
  xi.depth            = 32;
  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);
  bool pb_has_alpha = gdk_pixbuf_get_has_alpha (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 (!pb_has_alpha)
        for (int x = 0; x < width; x++)
          {
            uint8_t r = *src++;
            uint8_t g = *src++;
            uint8_t b = *src++;

            uint32_t v = (255 << 24) | (r << 16) | (g << 8) | b;
            
            if (ecb_big_endian () ? !byte_order_mismatch : 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_big_endian ())
              v = ecb_bswap32 (v);

            v = ecb_rotl32 (v, 8); // abgr to bgra

            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, 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;
}
# endif

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;

  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 ();

  XRenderPictureAttributes pa;
  pa.repeat = RepeatPad;
  Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
  Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);

  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, tmp, 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, Bool component_alpha)
{
  Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);

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

  XFreePixmap (dpy, pixmap);

  return mask;
}

static void
extract (int32_t cl0, int32_t cl1, int32_t &c, unsigned short &xc)
{
  int32_t x = clamp (c, cl0, cl1);
  c -= x;
  xc = x;
}

static bool
extract (int32_t cl0, int32_t cl1, int32_t &r, int32_t &g, int32_t &b, int32_t &a, unsigned short &xr, unsigned short &xg, unsigned short &xb, unsigned short &xa)
{
  extract (cl0, cl1, r, xr);
  extract (cl0, cl1, g, xg);
  extract (cl0, cl1, b, xb);
  extract (cl0, cl1, a, xa);

  return xr | xg | xb | xa;
}

void
rxvt_img::brightness (int32_t r, int32_t g, int32_t b, int32_t a)
{
  unshare ();

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

  // loop should not be needed for brightness, as only -1..1 makes sense
  //while (r | g | b | a)
    {
      unsigned short xr, xg, xb, xa;
      XRenderColor mask_c;

      if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
        XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);

      if (extract (-65535, 0, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
        {
          XRenderColor mask_w = { 65535, 65535, 65535, 65535 };
          XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
          mask_c.red   = -mask_c.red; //TODO: verify that doing clamp, assign, and negation does the right thing
          mask_c.green = -mask_c.green;
          mask_c.blue  = -mask_c.blue;
          mask_c.alpha = -mask_c.alpha;
          XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
          XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
        }
    }

  XRenderFreePicture (dpy, dst);
}

void
rxvt_img::contrast (int32_t r, int32_t g, int32_t b, int32_t a)
{
  if (r < 0 || g < 0 || b < 0 || a < 0)
    rxvt_fatal ("rxvt_img::contrast does not support negative values.\n");

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

  {
    rxvt_color empty;
    empty.set (s, rgba (0, 0, 0, 0));
    img->fill (empty);
  }

  // premultiply (yeah, these are not exact, sue me or fix it)
  r = (r * (a >> 8)) >> 8;
  g = (g * (a >> 8)) >> 8;
  b = (b * (a >> 8)) >> 8;

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

  Picture src = src_picture ();
  Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);
  Picture mul = create_xrender_mask (dpy, pm, True, True);

  //TODO: this operator does not yet implement some useful contrast
  while (r | g | b | a)
    {
      unsigned short xr, xg, xb, xa;
      XRenderColor mask_c;

      if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
        {
          XRenderFillRectangle (dpy, PictOpSrc, mul, &mask_c, 0, 0, 1, 1);
          XRenderComposite (dpy, PictOpAdd, src, mul, dst, 0, 0, 0, 0, 0, 0, w, h);
        }
    }

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

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

  delete img;
}

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;

  // add an alpha channel if...
  bool alpha = !format->direct.alphaMask // pixmap has none yet
               && (x || y)               // we need one because of non-zero offset
               && repeat == RepeatNone;  // and we have no good pixels to fill with

  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]);

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

  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, 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:	1.76
Committed:	Sun Jun 10 10:29:26 2012 UTC (11 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.75:	+6 -7 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	root	1.4	rxvt_img *
20	sf-exg	1.21	rxvt_img::new_from_root (rxvt_screen *s)
21			{
22			Display *dpy = s->display->dpy;
23			unsigned int root_pm_w, root_pm_h;
24			Pixmap root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_XROOTPMAP_ID]);
25			if (root_pixmap == None)
26			root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_ESETROOT_PMAP_ID]);
27
28			if (root_pixmap == None)
29			return 0;
30
31			Window wdummy;
32			int idummy;
33			unsigned int udummy;
34
35			if (!XGetGeometry (dpy, root_pixmap, &wdummy, &idummy, &idummy, &root_pm_w, &root_pm_h, &udummy, &udummy))
36			return 0;
37
38			rxvt_img *img = new rxvt_img (
39			s,
40			XRenderFindVisualFormat (dpy, DefaultVisual (dpy, s->display->screen)),
41	root	1.33	0,
42			0,
43	sf-exg	1.21	root_pm_w,
44	root	1.32	root_pm_h
45	sf-exg	1.21	);
46
47	root	1.32	img->pm = root_pixmap;
48	root	1.34	img->ref = new pixref (root_pm_w, root_pm_h);
49			img->ref->ours = false;
50	sf-exg	1.21
51			return img;
52			}
53
54	sf-exg	1.73	# if HAVE_PIXBUF
55	sf-exg	1.21	rxvt_img *
56	root	1.47	rxvt_img::new_from_pixbuf (rxvt_screen s, GdkPixbuf pb)
57			{
58	root	1.48	Display *dpy = s->display->dpy;
59
60	root	1.47	int width = gdk_pixbuf_get_width (pb);
61			int height = gdk_pixbuf_get_height (pb);
62
63			if (width > 32767 \|\| height > 32767) // well, we could upload in chunks
64			rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n");
65
66			// since we require rgb24/argb32 formats from xrender we assume
67			// that both 24 and 32 bpp MUST be supported by any screen that supports xrender
68
69	root	1.54	int byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
70
71	root	1.47	XImage xi;
72
73			xi.width = width;
74			xi.height = height;
75			xi.xoffset = 0;
76			xi.format = ZPixmap;
77	root	1.54	xi.byte_order = ImageByteOrder (dpy);
78	root	1.55	xi.bitmap_unit = 0; //XY only, unused
79			xi.bitmap_bit_order = 0; //XY only, unused
80	root	1.48	xi.bitmap_pad = BitmapPad (dpy);
81	root	1.76	xi.depth = 32;
82	root	1.47	xi.bytes_per_line = 0;
83	root	1.51	xi.bits_per_pixel = 32; //Z only
84	root	1.52	xi.red_mask = 0x00000000; //Z only, unused
85			xi.green_mask = 0x00000000; //Z only, unused
86			xi.blue_mask = 0x00000000; //Z only, unused
87			xi.obdata = 0; // probably unused
88	root	1.47
89	root	1.54	bool byte_order_mismatch = byte_order != xi.byte_order;
90
91	root	1.47	if (!XInitImage (&xi))
92			rxvt_fatal ("unable to initialise ximage, please report.\n");
93
94			if (height > INT_MAX / xi.bytes_per_line)
95			rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n");
96
97			xi.data = (char )rxvt_malloc (height xi.bytes_per_line);
98
99			int rowstride = gdk_pixbuf_get_rowstride (pb);
100	root	1.76	bool pb_has_alpha = gdk_pixbuf_get_has_alpha (pb);
101			unsigned char *row = gdk_pixbuf_get_pixels (pb);
102	root	1.47
103			char *line = xi.data;
104
105			for (int y = 0; y < height; y++)
106			{
107	root	1.50	unsigned char *src = row;
108			uint32_t dst = (uint32_t )line;
109	root	1.47
110	root	1.76	if (!pb_has_alpha)
111	root	1.47	for (int x = 0; x < width; x++)
112			{
113	root	1.50	uint8_t r = *src++;
114			uint8_t g = *src++;
115			uint8_t b = *src++;
116
117	root	1.76	uint32_t v = (255 << 24) \| (r << 16) \| (g << 8) \| b;
118	root	1.50
119	root	1.56	if (ecb_big_endian () ? !byte_order_mismatch : byte_order_mismatch)
120	root	1.54	v = ecb_bswap32 (v);
121
122	root	1.51	*dst++ = v;
123	root	1.47	}
124			else
125			for (int x = 0; x < width; x++)
126			{
127	root	1.50	uint32_t v = (uint32_t )src; src += 4;
128	root	1.51
129	root	1.57	if (ecb_big_endian ())
130	root	1.51	v = ecb_bswap32 (v);
131
132	root	1.58	v = ecb_rotl32 (v, 8); // abgr to bgra
133	root	1.52
134	root	1.57	if (!byte_order_mismatch)
135	root	1.54	v = ecb_bswap32 (v);
136
137	root	1.51	*dst++ = v;
138	root	1.47	}
139
140			row += rowstride;
141	root	1.50	line += xi.bytes_per_line;
142	root	1.47	}
143
144	root	1.76	rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, PictStandardARGB32), 0, 0, width, height);
145	root	1.47	img->alloc ();
146
147			GC gc = XCreateGC (dpy, img->pm, 0, 0);
148			XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);
149			XFreeGC (dpy, gc);
150
151			free (xi.data);
152
153			return img;
154			}
155
156			rxvt_img *
157	root	1.4	rxvt_img::new_from_file (rxvt_screen s, const char filename)
158			{
159	root	1.11	GError *err = 0;
160	root	1.4	GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
161
162			if (!pb)
163	root	1.11	rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
164	root	1.4
165	root	1.47	rxvt_img *img = new_from_pixbuf (s, pb);
166	root	1.4
167	sf-exg	1.26	g_object_unref (pb);
168
169	root	1.4	return img;
170			}
171	sf-exg	1.73	# endif
172	root	1.4
173	root	1.32	void
174			rxvt_img::destroy ()
175			{
176	root	1.34	if (--ref->cnt)
177	root	1.32	return;
178
179	root	1.34	if (pm && ref->ours)
180	root	1.32	XFreePixmap (s->display->dpy, pm);
181
182	root	1.34	delete ref;
183	root	1.32	}
184
185	root	1.1	rxvt_img::~rxvt_img ()
186			{
187	root	1.32	destroy ();
188			}
189
190			void
191			rxvt_img::alloc ()
192			{
193			pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
194	root	1.34	ref = new pixref (w, h);
195			}
196
197			Picture
198			rxvt_img::src_picture ()
199			{
200			Display *dpy = s->display->dpy;
201
202			XRenderPictureAttributes pa;
203			pa.repeat = repeat;
204			Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
205
206			return pic;
207	root	1.1	}
208
209			void
210	root	1.11	rxvt_img::unshare ()
211			{
212	root	1.34	if (ref->cnt == 1 && ref->ours)
213	root	1.11	return;
214
215	root	1.34	Pixmap pm2 = XCreatePixmap (s->display->dpy, s->display->root, ref->w, ref->h, format->depth);
216	root	1.32	GC gc = XCreateGC (s->display->dpy, pm, 0, 0);
217	root	1.34	XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
218	root	1.32	XFreeGC (s->display->dpy, gc);
219	root	1.11
220	root	1.32	destroy ();
221	root	1.11
222	root	1.32	pm = pm2;
223	root	1.34	ref = new pixref (ref->w, ref->h);
224	root	1.11	}
225
226			void
227	root	1.1	rxvt_img::fill (const rxvt_color &c)
228			{
229			XGCValues gcv;
230			gcv.foreground = c;
231			GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv);
232			XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h);
233	root	1.3	XFreeGC (s->display->dpy, gc);
234	root	1.1	}
235
236	sf-exg	1.6	static void
237			get_gaussian_kernel (int radius, int width, double kernel, XFixed params)
238			{
239			double sigma = radius / 2.0;
240			double scale = sqrt (2.0 * M_PI) * sigma;
241			double sum = 0.0;
242
243			for (int i = 0; i < width; i++)
244			{
245			double x = i - width / 2;
246			kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
247			sum += kernel[i];
248			}
249
250			params[0] = XDoubleToFixed (width);
251			params[1] = XDoubleToFixed (1);
252
253			for (int i = 0; i < width; i++)
254			params[i+2] = XDoubleToFixed (kernel[i] / sum);
255			}
256
257	sf-exg	1.22	rxvt_img *
258	root	1.3	rxvt_img::blur (int rh, int rv)
259			{
260	sf-exg	1.6	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
261	sf-exg	1.22	return clone ();
262	sf-exg	1.6
263			Display *dpy = s->display->dpy;
264			int size = max (rh, rv) * 2 + 1;
265			double kernel = (double )malloc (size * sizeof (double));
266			XFixed params = (XFixed )malloc ((size + 2) * sizeof (XFixed));
267	root	1.41	rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
268	root	1.32	img->alloc ();
269	sf-exg	1.6
270			XRenderPictureAttributes pa;
271			pa.repeat = RepeatPad;
272	sf-exg	1.61	Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
273			Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);
274	sf-exg	1.22
275			Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);
276			Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);
277			XFreePixmap (dpy, tmp_pm);
278	sf-exg	1.6
279			if (kernel && params)
280			{
281			size = rh * 2 + 1;
282			get_gaussian_kernel (rh, size, kernel, params);
283
284			XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
285			XRenderComposite (dpy,
286			PictOpSrc,
287			src,
288			None,
289	sf-exg	1.22	tmp,
290	sf-exg	1.6	0, 0,
291			0, 0,
292			0, 0,
293			w, h);
294
295			size = rv * 2 + 1;
296			get_gaussian_kernel (rv, size, kernel, params);
297			::swap (params[0], params[1]);
298
299	sf-exg	1.60	XRenderSetPictureFilter (dpy, tmp, FilterConvolution, params, size+2);
300	sf-exg	1.6	XRenderComposite (dpy,
301			PictOpSrc,
302	sf-exg	1.22	tmp,
303	sf-exg	1.6	None,
304			dst,
305			0, 0,
306			0, 0,
307			0, 0,
308			w, h);
309			}
310
311			free (kernel);
312			free (params);
313			XRenderFreePicture (dpy, src);
314			XRenderFreePicture (dpy, dst);
315	sf-exg	1.22	XRenderFreePicture (dpy, tmp);
316
317			return img;
318	sf-exg	1.6	}
319
320	root	1.74	static Picture
321	sf-exg	1.75	create_xrender_mask (Display *dpy, Drawable drawable, Bool argb, Bool component_alpha)
322	root	1.74	{
323			Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);
324
325			XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8);
326			XRenderPictureAttributes pa;
327			pa.repeat = RepeatNormal;
328	sf-exg	1.75	pa.component_alpha = component_alpha;
329			Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat \| CPComponentAlpha, &pa);
330	root	1.74
331			XFreePixmap (dpy, pixmap);
332
333			return mask;
334			}
335
336	root	1.67	static void
337			extract (int32_t cl0, int32_t cl1, int32_t &c, unsigned short &xc)
338			{
339			int32_t x = clamp (c, cl0, cl1);
340			c -= x;
341			xc = x;
342			}
343
344			static bool
345			extract (int32_t cl0, int32_t cl1, int32_t &r, int32_t &g, int32_t &b, int32_t &a, unsigned short &xr, unsigned short &xg, unsigned short &xb, unsigned short &xa)
346			{
347			extract (cl0, cl1, r, xr);
348			extract (cl0, cl1, g, xg);
349			extract (cl0, cl1, b, xb);
350			extract (cl0, cl1, a, xa);
351
352			return xr \| xg \| xb \| xa;
353			}
354
355	root	1.3	void
356	root	1.67	rxvt_img::brightness (int32_t r, int32_t g, int32_t b, int32_t a)
357	root	1.3	{
358	root	1.67	unshare ();
359
360	sf-exg	1.6	Display *dpy = s->display->dpy;
361			Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
362
363	root	1.69	// loop should not be needed for brightness, as only -1..1 makes sense
364	root	1.70	//while (r \| g \| b \| a)
365	root	1.67	{
366			unsigned short xr, xg, xb, xa;
367			XRenderColor mask_c;
368
369			if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
370			XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
371
372			if (extract (-65535, 0, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
373			{
374			XRenderColor mask_w = { 65535, 65535, 65535, 65535 };
375			XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
376	root	1.70	mask_c.red = -mask_c.red; //TODO: verify that doing clamp, assign, and negation does the right thing
377	root	1.68	mask_c.green = -mask_c.green;
378			mask_c.blue = -mask_c.blue;
379			mask_c.alpha = -mask_c.alpha;
380	root	1.67	XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
381			XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
382			}
383			}
384	sf-exg	1.6
385	sf-exg	1.23	XRenderFreePicture (dpy, dst);
386	root	1.3	}
387
388			void
389	root	1.67	rxvt_img::contrast (int32_t r, int32_t g, int32_t b, int32_t a)
390	root	1.1	{
391	root	1.74	if (r < 0 \|\| g < 0 \|\| b < 0 \|\| a < 0)
392			rxvt_fatal ("rxvt_img::contrast does not support negative values.\n");
393
394			rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
395			img->alloc ();
396	sf-exg	1.6
397	root	1.74	{
398			rxvt_color empty;
399			empty.set (s, rgba (0, 0, 0, 0));
400			img->fill (empty);
401			}
402
403			// premultiply (yeah, these are not exact, sue me or fix it)
404			r = (r * (a >> 8)) >> 8;
405			g = (g * (a >> 8)) >> 8;
406			b = (b * (a >> 8)) >> 8;
407	root	1.67
408	sf-exg	1.6	Display *dpy = s->display->dpy;
409
410	root	1.74	Picture src = src_picture ();
411			Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);
412	sf-exg	1.75	Picture mul = create_xrender_mask (dpy, pm, True, True);
413	root	1.74
414			//TODO: this operator does not yet implement some useful contrast
415			while (r \| g \| b \| a)
416			{
417			unsigned short xr, xg, xb, xa;
418			XRenderColor mask_c;
419
420			if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
421			{
422			XRenderFillRectangle (dpy, PictOpSrc, mul, &mask_c, 0, 0, 1, 1);
423			XRenderComposite (dpy, PictOpAdd, src, mul, dst, 0, 0, 0, 0, 0, 0, w, h);
424			}
425			}
426	sf-exg	1.6
427	root	1.74	XRenderFreePicture (dpy, mul);
428	sf-exg	1.23	XRenderFreePicture (dpy, dst);
429	root	1.74	XRenderFreePicture (dpy, src);
430
431			::swap (img->ref, ref);
432			::swap (img->pm , pm );
433
434			delete img;
435	root	1.1	}
436
437	root	1.3	rxvt_img *
438	root	1.11	rxvt_img::clone ()
439	root	1.3	{
440	root	1.32	return new rxvt_img (*this);
441	root	1.3	}
442
443	root	1.46	static XRenderPictFormat *
444			find_alpha_format_for (Display dpy, XRenderPictFormat format)
445			{
446			if (format->direct.alphaMask)
447			return format; // already has alpha
448
449			// try to find a suitable alpha format, one bit alpha is enough for our purposes
450			if (format->type == PictTypeDirect)
451			for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
452			if (f->direct.alphaMask
453			&& f->type == PictTypeDirect
454			&& ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
455			&& ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
456			&& ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
457			return f;
458
459			// should be a very good fallback
460			return XRenderFindStandardFormat (dpy, PictStandardARGB32);
461			}
462
463	root	1.3	rxvt_img *
464	root	1.33	rxvt_img::reify ()
465	root	1.19	{
466	root	1.35	if (x == 0 && y == 0 && w == ref->w && h == ref->h)
467			return clone ();
468
469	root	1.40	Display *dpy = s->display->dpy;
470
471	root	1.62	// add an alpha channel if...
472			bool alpha = !format->direct.alphaMask // pixmap has none yet
473			&& (x \|\| y) // we need one because of non-zero offset
474			&& repeat == RepeatNone; // and we have no good pixels to fill with
475	root	1.40
476	root	1.46	rxvt_img *img = new rxvt_img (s, alpha ? find_alpha_format_for (dpy, format) : format, 0, 0, w, h, repeat);
477	root	1.32	img->alloc ();
478	root	1.19
479	root	1.34	Picture src = src_picture ();
480			Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
481	root	1.33
482	root	1.42	if (alpha)
483			{
484			XRenderColor rc = { 0, 0, 0, 0 };
485	root	1.44	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
486	root	1.42	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, -x, -y, ref->w, ref->h);
487			}
488			else
489			XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, w, h);
490
491	root	1.33	XRenderFreePicture (dpy, src);
492			XRenderFreePicture (dpy, dst);
493	root	1.19
494	root	1.33	return img;
495			}
496	root	1.19
497	root	1.33	rxvt_img *
498			rxvt_img::sub_rect (int x, int y, int width, int height)
499			{
500			rxvt_img *img = clone ();
501
502			img->x += x;
503			img->y += y;
504	root	1.19
505	root	1.37	if (w != width \|\| h != height)
506			{
507			img->w = width;
508			img->h = height;
509
510	root	1.39	rxvt_img *img2 = img->reify ();
511			delete img;
512			img = img2;
513	root	1.37	}
514	root	1.36
515	root	1.19	return img;
516			}
517
518			rxvt_img *
519	root	1.30	rxvt_img::transform (int new_width, int new_height, double matrix[9])
520	root	1.3	{
521	root	1.41	rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height, repeat);
522	root	1.32	img->alloc ();
523	root	1.12
524			Display *dpy = s->display->dpy;
525	root	1.34	Picture src = src_picture ();
526			Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
527	root	1.12
528			XTransform xfrm;
529
530			for (int i = 0; i < 3; ++i)
531			for (int j = 0; j < 3; ++j)
532			xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]);
533
534	root	1.44	xfrm.matrix [0][2] -= XDoubleToFixed (x);//TODO
535			xfrm.matrix [1][2] -= XDoubleToFixed (y);
536	root	1.33
537	root	1.17	XRenderSetPictureFilter (dpy, src, "good", 0, 0);
538	root	1.12	XRenderSetPictureTransform (dpy, src, &xfrm);
539			XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height);
540
541			XRenderFreePicture (dpy, src);
542			XRenderFreePicture (dpy, dst);
543
544			return img;
545	root	1.3	}
546
547			rxvt_img *
548			rxvt_img::scale (int new_width, int new_height)
549			{
550	sf-exg	1.43	if (w == new_width && h == new_height)
551			return clone ();
552
553	root	1.11	double matrix[9] = {
554	root	1.16	w / (double)new_width, 0, 0,
555			0, h / (double)new_height, 0,
556	root	1.11	0, 0, 1
557			};
558
559	root	1.42	int old_repeat_mode = repeat;
560			repeat = RepeatPad; // not right, but xrender can't proeprly scale it seems
561
562			rxvt_img *img = transform (new_width, new_height, matrix);
563
564			repeat = old_repeat_mode;
565			img->repeat = repeat;
566
567			return img;
568	root	1.3	}
569
570	sf-exg	1.7	rxvt_img *
571	root	1.30	rxvt_img::rotate (int new_width, int new_height, int x, int y, double phi)
572	root	1.17	{
573			double s = sin (phi);
574			double c = cos (phi);
575
576			double matrix[9] = {
577			c, -s, -c * x + s * y + x,
578			s, c, -s * x - c * y + y,
579			0, 0, 1
580			};
581
582	root	1.30	return transform (new_width, new_height, matrix);
583	root	1.17	}
584
585			rxvt_img *
586	root	1.45	rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg)
587	sf-exg	1.7	{
588	root	1.32	if (new_format == format)
589			return clone ();
590
591	root	1.45	rxvt_img *img = new rxvt_img (s, new_format, x, y, w, h, repeat);
592	root	1.32	img->alloc ();
593	root	1.9
594	sf-exg	1.7	Display *dpy = s->display->dpy;
595	root	1.34	Picture src = src_picture ();
596	root	1.8	Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
597	root	1.27	int op = PictOpSrc;
598	sf-exg	1.7
599	root	1.29	if (format->direct.alphaMask && !new_format->direct.alphaMask)
600	root	1.27	{
601			// does it have to be that complicated
602			rgba c;
603			bg.get (c);
604
605			XRenderColor rc = { c.r, c.g, c.b, 0xffff };
606	root	1.28	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);
607	root	1.27
608			op = PictOpOver;
609			}
610
611			XRenderComposite (dpy, op, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
612	sf-exg	1.7
613			XRenderFreePicture (dpy, src);
614			XRenderFreePicture (dpy, dst);
615
616			return img;
617			}
618	root	1.3
619	sf-exg	1.24	rxvt_img *
620			rxvt_img::blend (rxvt_img *img, double factor)
621			{
622			rxvt_img *img2 = clone ();
623			Display *dpy = s->display->dpy;
624	sf-exg	1.38	Picture src = img->src_picture ();
625	sf-exg	1.24	Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
626	sf-exg	1.75	Picture mask = create_xrender_mask (dpy, img->pm, False, False);
627	sf-exg	1.24
628			XRenderColor mask_c;
629
630			mask_c.alpha = float_to_component (factor);
631			mask_c.red =
632			mask_c.green =
633			mask_c.blue = 0;
634			XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);
635
636			XRenderComposite (dpy, PictOpOver, src, mask, dst, 0, 0, 0, 0, 0, 0, w, h);
637
638			XRenderFreePicture (dpy, src);
639			XRenderFreePicture (dpy, dst);
640			XRenderFreePicture (dpy, mask);
641
642			return img2;
643			}
644
645	root	1.1	#endif
646