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)
{
  rgba cc;
  c.get (cc);
  XRenderColor rc = { cc.r, cc.g, cc.b, cc.a };

  Display *dpy = s->display->dpy;
  Picture src = src_picture ();
  XRenderFillRectangle (dpy, PictOpSrc, src, &rc, 0, 0, w, h);
  XRenderFreePicture (dpy, src);
}

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 (double matrix[9], int new_width, int new_height)
{
  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 properly scale it seems

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

  repeat = old_repeat_mode;
  img->repeat = repeat;

  return img;
}

rxvt_img *
rxvt_img::rotate (int x, int y, double phi, int new_width, int new_height)
{
  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 (matrix, new_width, new_height);
}

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:	1.79
Committed:	Tue Jun 12 10:45:53 2012 UTC (11 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.78:	+4 -4 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	root	1.77
56	sf-exg	1.21	rxvt_img *
57	root	1.47	rxvt_img::new_from_pixbuf (rxvt_screen s, GdkPixbuf pb)
58			{
59	root	1.48	Display *dpy = s->display->dpy;
60
61	root	1.47	int width = gdk_pixbuf_get_width (pb);
62			int height = gdk_pixbuf_get_height (pb);
63
64			if (width > 32767 \|\| height > 32767) // well, we could upload in chunks
65			rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n");
66
67			// since we require rgb24/argb32 formats from xrender we assume
68			// that both 24 and 32 bpp MUST be supported by any screen that supports xrender
69
70	root	1.54	int byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
71
72	root	1.47	XImage xi;
73
74			xi.width = width;
75			xi.height = height;
76			xi.xoffset = 0;
77			xi.format = ZPixmap;
78	root	1.54	xi.byte_order = ImageByteOrder (dpy);
79	root	1.55	xi.bitmap_unit = 0; //XY only, unused
80			xi.bitmap_bit_order = 0; //XY only, unused
81	root	1.48	xi.bitmap_pad = BitmapPad (dpy);
82	root	1.76	xi.depth = 32;
83	root	1.47	xi.bytes_per_line = 0;
84	root	1.51	xi.bits_per_pixel = 32; //Z only
85	root	1.52	xi.red_mask = 0x00000000; //Z only, unused
86			xi.green_mask = 0x00000000; //Z only, unused
87			xi.blue_mask = 0x00000000; //Z only, unused
88			xi.obdata = 0; // probably unused
89	root	1.47
90	root	1.54	bool byte_order_mismatch = byte_order != xi.byte_order;
91
92	root	1.47	if (!XInitImage (&xi))
93			rxvt_fatal ("unable to initialise ximage, please report.\n");
94
95			if (height > INT_MAX / xi.bytes_per_line)
96			rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n");
97
98			xi.data = (char )rxvt_malloc (height xi.bytes_per_line);
99
100			int rowstride = gdk_pixbuf_get_rowstride (pb);
101	root	1.76	bool pb_has_alpha = gdk_pixbuf_get_has_alpha (pb);
102			unsigned char *row = gdk_pixbuf_get_pixels (pb);
103	root	1.47
104			char *line = xi.data;
105
106			for (int y = 0; y < height; y++)
107			{
108	root	1.50	unsigned char *src = row;
109			uint32_t dst = (uint32_t )line;
110	root	1.47
111	root	1.76	if (!pb_has_alpha)
112	root	1.47	for (int x = 0; x < width; x++)
113			{
114	root	1.50	uint8_t r = *src++;
115			uint8_t g = *src++;
116			uint8_t b = *src++;
117
118	root	1.76	uint32_t v = (255 << 24) \| (r << 16) \| (g << 8) \| b;
119	root	1.50
120	root	1.56	if (ecb_big_endian () ? !byte_order_mismatch : byte_order_mismatch)
121	root	1.54	v = ecb_bswap32 (v);
122
123	root	1.51	*dst++ = v;
124	root	1.47	}
125			else
126			for (int x = 0; x < width; x++)
127			{
128	root	1.50	uint32_t v = (uint32_t )src; src += 4;
129	root	1.51
130	root	1.57	if (ecb_big_endian ())
131	root	1.51	v = ecb_bswap32 (v);
132
133	root	1.58	v = ecb_rotl32 (v, 8); // abgr to bgra
134	root	1.52
135	root	1.57	if (!byte_order_mismatch)
136	root	1.54	v = ecb_bswap32 (v);
137
138	root	1.51	*dst++ = v;
139	root	1.47	}
140
141			row += rowstride;
142	root	1.50	line += xi.bytes_per_line;
143	root	1.47	}
144
145	root	1.76	rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, PictStandardARGB32), 0, 0, width, height);
146	root	1.47	img->alloc ();
147
148			GC gc = XCreateGC (dpy, img->pm, 0, 0);
149			XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);
150			XFreeGC (dpy, gc);
151
152			free (xi.data);
153
154			return img;
155			}
156
157			rxvt_img *
158	root	1.4	rxvt_img::new_from_file (rxvt_screen s, const char filename)
159			{
160	root	1.11	GError *err = 0;
161	root	1.4	GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
162
163			if (!pb)
164	root	1.11	rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
165	root	1.4
166	root	1.47	rxvt_img *img = new_from_pixbuf (s, pb);
167	root	1.4
168	sf-exg	1.26	g_object_unref (pb);
169
170	root	1.4	return img;
171			}
172	root	1.77
173	sf-exg	1.73	# endif
174	root	1.4
175	root	1.32	void
176			rxvt_img::destroy ()
177			{
178	root	1.34	if (--ref->cnt)
179	root	1.32	return;
180
181	root	1.34	if (pm && ref->ours)
182	root	1.32	XFreePixmap (s->display->dpy, pm);
183
184	root	1.34	delete ref;
185	root	1.32	}
186
187	root	1.1	rxvt_img::~rxvt_img ()
188			{
189	root	1.32	destroy ();
190			}
191
192			void
193			rxvt_img::alloc ()
194			{
195			pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
196	root	1.34	ref = new pixref (w, h);
197			}
198
199			Picture
200			rxvt_img::src_picture ()
201			{
202			Display *dpy = s->display->dpy;
203
204			XRenderPictureAttributes pa;
205			pa.repeat = repeat;
206			Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
207
208			return pic;
209	root	1.1	}
210
211			void
212	root	1.11	rxvt_img::unshare ()
213			{
214	root	1.34	if (ref->cnt == 1 && ref->ours)
215	root	1.11	return;
216
217	root	1.34	Pixmap pm2 = XCreatePixmap (s->display->dpy, s->display->root, ref->w, ref->h, format->depth);
218	root	1.32	GC gc = XCreateGC (s->display->dpy, pm, 0, 0);
219	root	1.34	XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
220	root	1.32	XFreeGC (s->display->dpy, gc);
221	root	1.11
222	root	1.32	destroy ();
223	root	1.11
224	root	1.32	pm = pm2;
225	root	1.34	ref = new pixref (ref->w, ref->h);
226	root	1.11	}
227
228			void
229	root	1.1	rxvt_img::fill (const rxvt_color &c)
230			{
231	root	1.77	rgba cc;
232			c.get (cc);
233			XRenderColor rc = { cc.r, cc.g, cc.b, cc.a };
234
235			Display *dpy = s->display->dpy;
236			Picture src = src_picture ();
237			XRenderFillRectangle (dpy, PictOpSrc, src, &rc, 0, 0, w, h);
238			XRenderFreePicture (dpy, src);
239	root	1.1	}
240
241	sf-exg	1.6	static void
242			get_gaussian_kernel (int radius, int width, double kernel, XFixed params)
243			{
244			double sigma = radius / 2.0;
245			double scale = sqrt (2.0 * M_PI) * sigma;
246			double sum = 0.0;
247
248			for (int i = 0; i < width; i++)
249			{
250			double x = i - width / 2;
251			kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
252			sum += kernel[i];
253			}
254
255			params[0] = XDoubleToFixed (width);
256			params[1] = XDoubleToFixed (1);
257
258			for (int i = 0; i < width; i++)
259			params[i+2] = XDoubleToFixed (kernel[i] / sum);
260			}
261
262	sf-exg	1.22	rxvt_img *
263	root	1.3	rxvt_img::blur (int rh, int rv)
264			{
265	sf-exg	1.6	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
266	sf-exg	1.22	return clone ();
267	sf-exg	1.6
268			Display *dpy = s->display->dpy;
269			int size = max (rh, rv) * 2 + 1;
270			double kernel = (double )malloc (size * sizeof (double));
271			XFixed params = (XFixed )malloc ((size + 2) * sizeof (XFixed));
272	root	1.41	rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
273	root	1.32	img->alloc ();
274	sf-exg	1.6
275			XRenderPictureAttributes pa;
276			pa.repeat = RepeatPad;
277	sf-exg	1.61	Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
278			Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);
279	sf-exg	1.22
280			Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);
281			Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);
282			XFreePixmap (dpy, tmp_pm);
283	sf-exg	1.6
284			if (kernel && params)
285			{
286			size = rh * 2 + 1;
287			get_gaussian_kernel (rh, size, kernel, params);
288
289			XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
290			XRenderComposite (dpy,
291			PictOpSrc,
292			src,
293			None,
294	sf-exg	1.22	tmp,
295	sf-exg	1.6	0, 0,
296			0, 0,
297			0, 0,
298			w, h);
299
300			size = rv * 2 + 1;
301			get_gaussian_kernel (rv, size, kernel, params);
302			::swap (params[0], params[1]);
303
304	sf-exg	1.60	XRenderSetPictureFilter (dpy, tmp, FilterConvolution, params, size+2);
305	sf-exg	1.6	XRenderComposite (dpy,
306			PictOpSrc,
307	sf-exg	1.22	tmp,
308	sf-exg	1.6	None,
309			dst,
310			0, 0,
311			0, 0,
312			0, 0,
313			w, h);
314			}
315
316			free (kernel);
317			free (params);
318	root	1.77
319	sf-exg	1.6	XRenderFreePicture (dpy, src);
320			XRenderFreePicture (dpy, dst);
321	sf-exg	1.22	XRenderFreePicture (dpy, tmp);
322
323			return img;
324	sf-exg	1.6	}
325
326	root	1.74	static Picture
327	sf-exg	1.75	create_xrender_mask (Display *dpy, Drawable drawable, Bool argb, Bool component_alpha)
328	root	1.74	{
329			Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);
330
331			XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8);
332			XRenderPictureAttributes pa;
333			pa.repeat = RepeatNormal;
334	sf-exg	1.75	pa.component_alpha = component_alpha;
335			Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat \| CPComponentAlpha, &pa);
336	root	1.74
337			XFreePixmap (dpy, pixmap);
338
339			return mask;
340			}
341
342	root	1.67	static void
343			extract (int32_t cl0, int32_t cl1, int32_t &c, unsigned short &xc)
344			{
345			int32_t x = clamp (c, cl0, cl1);
346			c -= x;
347			xc = x;
348			}
349
350			static bool
351			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)
352			{
353			extract (cl0, cl1, r, xr);
354			extract (cl0, cl1, g, xg);
355			extract (cl0, cl1, b, xb);
356			extract (cl0, cl1, a, xa);
357
358			return xr \| xg \| xb \| xa;
359			}
360
361	root	1.3	void
362	root	1.67	rxvt_img::brightness (int32_t r, int32_t g, int32_t b, int32_t a)
363	root	1.3	{
364	root	1.67	unshare ();
365
366	sf-exg	1.6	Display *dpy = s->display->dpy;
367			Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
368
369	root	1.69	// loop should not be needed for brightness, as only -1..1 makes sense
370	root	1.70	//while (r \| g \| b \| a)
371	root	1.67	{
372			unsigned short xr, xg, xb, xa;
373			XRenderColor mask_c;
374
375			if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
376			XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
377
378			if (extract (-65535, 0, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
379			{
380			XRenderColor mask_w = { 65535, 65535, 65535, 65535 };
381			XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
382	root	1.70	mask_c.red = -mask_c.red; //TODO: verify that doing clamp, assign, and negation does the right thing
383	root	1.68	mask_c.green = -mask_c.green;
384			mask_c.blue = -mask_c.blue;
385			mask_c.alpha = -mask_c.alpha;
386	root	1.67	XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
387			XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
388			}
389			}
390	sf-exg	1.6
391	sf-exg	1.23	XRenderFreePicture (dpy, dst);
392	root	1.3	}
393
394			void
395	root	1.67	rxvt_img::contrast (int32_t r, int32_t g, int32_t b, int32_t a)
396	root	1.1	{
397	root	1.74	if (r < 0 \|\| g < 0 \|\| b < 0 \|\| a < 0)
398			rxvt_fatal ("rxvt_img::contrast does not support negative values.\n");
399
400			rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
401			img->alloc ();
402	sf-exg	1.6
403	root	1.74	{
404			rxvt_color empty;
405			empty.set (s, rgba (0, 0, 0, 0));
406			img->fill (empty);
407			}
408
409			// premultiply (yeah, these are not exact, sue me or fix it)
410			r = (r * (a >> 8)) >> 8;
411			g = (g * (a >> 8)) >> 8;
412			b = (b * (a >> 8)) >> 8;
413	root	1.67
414	sf-exg	1.6	Display *dpy = s->display->dpy;
415
416	root	1.74	Picture src = src_picture ();
417			Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);
418	sf-exg	1.75	Picture mul = create_xrender_mask (dpy, pm, True, True);
419	root	1.74
420			//TODO: this operator does not yet implement some useful contrast
421			while (r \| g \| b \| a)
422			{
423			unsigned short xr, xg, xb, xa;
424			XRenderColor mask_c;
425
426			if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
427			{
428			XRenderFillRectangle (dpy, PictOpSrc, mul, &mask_c, 0, 0, 1, 1);
429			XRenderComposite (dpy, PictOpAdd, src, mul, dst, 0, 0, 0, 0, 0, 0, w, h);
430			}
431			}
432	sf-exg	1.6
433	root	1.74	XRenderFreePicture (dpy, mul);
434	sf-exg	1.23	XRenderFreePicture (dpy, dst);
435	root	1.74	XRenderFreePicture (dpy, src);
436
437			::swap (img->ref, ref);
438			::swap (img->pm , pm );
439
440			delete img;
441	root	1.1	}
442
443	root	1.3	rxvt_img *
444	root	1.11	rxvt_img::clone ()
445	root	1.3	{
446	root	1.32	return new rxvt_img (*this);
447	root	1.3	}
448
449	root	1.46	static XRenderPictFormat *
450			find_alpha_format_for (Display dpy, XRenderPictFormat format)
451			{
452			if (format->direct.alphaMask)
453			return format; // already has alpha
454
455			// try to find a suitable alpha format, one bit alpha is enough for our purposes
456			if (format->type == PictTypeDirect)
457			for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
458			if (f->direct.alphaMask
459			&& f->type == PictTypeDirect
460			&& ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
461			&& ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
462			&& ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
463			return f;
464
465			// should be a very good fallback
466			return XRenderFindStandardFormat (dpy, PictStandardARGB32);
467			}
468
469	root	1.3	rxvt_img *
470	root	1.33	rxvt_img::reify ()
471	root	1.19	{
472	root	1.35	if (x == 0 && y == 0 && w == ref->w && h == ref->h)
473			return clone ();
474
475	root	1.40	Display *dpy = s->display->dpy;
476
477	root	1.62	// add an alpha channel if...
478			bool alpha = !format->direct.alphaMask // pixmap has none yet
479			&& (x \|\| y) // we need one because of non-zero offset
480			&& repeat == RepeatNone; // and we have no good pixels to fill with
481	root	1.40
482	root	1.46	rxvt_img *img = new rxvt_img (s, alpha ? find_alpha_format_for (dpy, format) : format, 0, 0, w, h, repeat);
483	root	1.32	img->alloc ();
484	root	1.19
485	root	1.34	Picture src = src_picture ();
486			Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
487	root	1.33
488	root	1.42	if (alpha)
489			{
490			XRenderColor rc = { 0, 0, 0, 0 };
491	root	1.44	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
492	root	1.42	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, -x, -y, ref->w, ref->h);
493			}
494			else
495			XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, w, h);
496
497	root	1.33	XRenderFreePicture (dpy, src);
498			XRenderFreePicture (dpy, dst);
499	root	1.19
500	root	1.33	return img;
501			}
502	root	1.19
503	root	1.33	rxvt_img *
504			rxvt_img::sub_rect (int x, int y, int width, int height)
505			{
506			rxvt_img *img = clone ();
507
508			img->x += x;
509			img->y += y;
510	root	1.19
511	root	1.37	if (w != width \|\| h != height)
512			{
513			img->w = width;
514			img->h = height;
515
516	root	1.39	rxvt_img *img2 = img->reify ();
517			delete img;
518			img = img2;
519	root	1.37	}
520	root	1.36
521	root	1.19	return img;
522			}
523
524			rxvt_img *
525	root	1.79	rxvt_img::transform (double matrix[9], int new_width, int new_height)
526	root	1.3	{
527	root	1.41	rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height, repeat);
528	root	1.32	img->alloc ();
529	root	1.12
530			Display *dpy = s->display->dpy;
531	root	1.34	Picture src = src_picture ();
532			Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
533	root	1.12
534			XTransform xfrm;
535
536			for (int i = 0; i < 3; ++i)
537			for (int j = 0; j < 3; ++j)
538			xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]);
539
540	root	1.44	xfrm.matrix [0][2] -= XDoubleToFixed (x);//TODO
541			xfrm.matrix [1][2] -= XDoubleToFixed (y);
542	root	1.33
543	root	1.17	XRenderSetPictureFilter (dpy, src, "good", 0, 0);
544	root	1.12	XRenderSetPictureTransform (dpy, src, &xfrm);
545			XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height);
546
547			XRenderFreePicture (dpy, src);
548			XRenderFreePicture (dpy, dst);
549
550			return img;
551	root	1.3	}
552
553			rxvt_img *
554			rxvt_img::scale (int new_width, int new_height)
555			{
556	sf-exg	1.43	if (w == new_width && h == new_height)
557			return clone ();
558
559	root	1.11	double matrix[9] = {
560	root	1.16	w / (double)new_width, 0, 0,
561			0, h / (double)new_height, 0,
562	root	1.11	0, 0, 1
563			};
564
565	root	1.42	int old_repeat_mode = repeat;
566	sf-exg	1.78	repeat = RepeatPad; // not right, but xrender can't properly scale it seems
567	root	1.42
568	root	1.79	rxvt_img *img = transform (matrix, new_width, new_height);
569	root	1.42
570			repeat = old_repeat_mode;
571			img->repeat = repeat;
572
573			return img;
574	root	1.3	}
575
576	sf-exg	1.7	rxvt_img *
577	root	1.79	rxvt_img::rotate (int x, int y, double phi, int new_width, int new_height)
578	root	1.17	{
579			double s = sin (phi);
580			double c = cos (phi);
581
582			double matrix[9] = {
583			c, -s, -c * x + s * y + x,
584			s, c, -s * x - c * y + y,
585			0, 0, 1
586			};
587
588	root	1.79	return transform (matrix, new_width, new_height);
589	root	1.17	}
590
591			rxvt_img *
592	root	1.45	rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg)
593	sf-exg	1.7	{
594	root	1.32	if (new_format == format)
595			return clone ();
596
597	root	1.45	rxvt_img *img = new rxvt_img (s, new_format, x, y, w, h, repeat);
598	root	1.32	img->alloc ();
599	root	1.9
600	sf-exg	1.7	Display *dpy = s->display->dpy;
601	root	1.34	Picture src = src_picture ();
602	root	1.8	Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
603	root	1.27	int op = PictOpSrc;
604	sf-exg	1.7
605	root	1.29	if (format->direct.alphaMask && !new_format->direct.alphaMask)
606	root	1.27	{
607			// does it have to be that complicated
608			rgba c;
609			bg.get (c);
610
611			XRenderColor rc = { c.r, c.g, c.b, 0xffff };
612	root	1.28	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);
613	root	1.27
614			op = PictOpOver;
615			}
616
617			XRenderComposite (dpy, op, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
618	sf-exg	1.7
619			XRenderFreePicture (dpy, src);
620			XRenderFreePicture (dpy, dst);
621
622			return img;
623			}
624	root	1.3
625	sf-exg	1.24	rxvt_img *
626			rxvt_img::blend (rxvt_img *img, double factor)
627			{
628			rxvt_img *img2 = clone ();
629			Display *dpy = s->display->dpy;
630	sf-exg	1.38	Picture src = img->src_picture ();
631	sf-exg	1.24	Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
632	sf-exg	1.75	Picture mask = create_xrender_mask (dpy, img->pm, False, False);
633	sf-exg	1.24
634			XRenderColor mask_c;
635
636			mask_c.alpha = float_to_component (factor);
637			mask_c.red =
638			mask_c.green =
639			mask_c.blue = 0;
640			XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);
641
642			XRenderComposite (dpy, PictOpOver, src, mask, dst, 0, 0, 0, 0, 0, 0, w, h);
643
644			XRenderFreePicture (dpy, src);
645			XRenderFreePicture (dpy, dst);
646			XRenderFreePicture (dpy, mask);
647
648			return img2;
649			}
650
651	root	1.1	#endif
652