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;
}

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      = 0;         //XY only, unused
  xi.bitmap_bit_order = 0;         //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 () ? !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, 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 ();

  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)
{
  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;

  // 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]);

#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:	1.62
Committed:	Fri Jun 8 17:22:48 2012 UTC (11 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.61:	+4 -3 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			rxvt_img *
55	root	1.47	rxvt_img::new_from_pixbuf (rxvt_screen s, GdkPixbuf pb)
56			{
57	root	1.48	Display *dpy = s->display->dpy;
58
59	root	1.47	int width = gdk_pixbuf_get_width (pb);
60			int height = gdk_pixbuf_get_height (pb);
61
62			if (width > 32767 \|\| height > 32767) // well, we could upload in chunks
63			rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n");
64
65			// since we require rgb24/argb32 formats from xrender we assume
66			// that both 24 and 32 bpp MUST be supported by any screen that supports xrender
67			int depth = gdk_pixbuf_get_has_alpha (pb) ? 32 : 24;
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	1.47	xi.depth = depth;
82			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
101			assert (3 + (depth == 32) == gdk_pixbuf_get_n_channels (pb));
102			unsigned char *row = gdk_pixbuf_get_pixels (pb);
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			if (depth == 24)
111			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	1.53	uint32_t v = (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			rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, depth == 24 ? PictStandardRGB24 : PictStandardARGB32), 0, 0, width, height);
145			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
172	root	1.32	void
173			rxvt_img::destroy ()
174			{
175	root	1.34	if (--ref->cnt)
176	root	1.32	return;
177
178	root	1.34	if (pm && ref->ours)
179	root	1.32	XFreePixmap (s->display->dpy, pm);
180
181	root	1.34	delete ref;
182	root	1.32	}
183
184	root	1.1	rxvt_img::~rxvt_img ()
185			{
186	root	1.32	destroy ();
187			}
188
189			void
190			rxvt_img::alloc ()
191			{
192			pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
193	root	1.34	ref = new pixref (w, h);
194			}
195
196			Picture
197			rxvt_img::src_picture ()
198			{
199			Display *dpy = s->display->dpy;
200
201			XRenderPictureAttributes pa;
202			pa.repeat = repeat;
203			Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
204
205			return pic;
206	root	1.1	}
207
208			void
209	root	1.11	rxvt_img::unshare ()
210			{
211	root	1.34	if (ref->cnt == 1 && ref->ours)
212	root	1.11	return;
213
214	root	1.34	//TODO: maybe should reify instead
215			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			static Picture
321			create_xrender_mask (Display *dpy, Drawable drawable, Bool argb)
322			{
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 = True;
328			Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa);
329
330			XFreePixmap (dpy, pixmap);
331
332			return mask;
333	root	1.3	}
334
335			void
336	sf-exg	1.31	rxvt_img::brightness (unsigned short r, unsigned short g, unsigned short b, unsigned short a)
337	root	1.3	{
338	sf-exg	1.6	Display *dpy = s->display->dpy;
339			Picture src = create_xrender_mask (dpy, pm, True);
340			Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
341
342			XRenderColor mask_c;
343	sf-exg	1.31	mask_c.red = r;
344			mask_c.green = g;
345			mask_c.blue = b;
346			mask_c.alpha = a;
347	sf-exg	1.6	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
348
349			XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
350	sf-exg	1.23
351			XRenderFreePicture (dpy, src);
352			XRenderFreePicture (dpy, dst);
353	root	1.3	}
354
355			void
356	sf-exg	1.31	rxvt_img::contrast (unsigned short r, unsigned short g, unsigned short b, unsigned short a)
357	root	1.1	{
358	sf-exg	1.6	if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL))
359			return;
360
361			Display *dpy = s->display->dpy;
362			Picture src = create_xrender_mask (dpy, pm, True);
363			Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
364
365			XRenderColor mask_c;
366	sf-exg	1.31	mask_c.red = r;
367			mask_c.green = g;
368			mask_c.blue = b;
369			mask_c.alpha = a;
370	sf-exg	1.6	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
371
372			XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
373	sf-exg	1.23
374			XRenderFreePicture (dpy, src);
375			XRenderFreePicture (dpy, dst);
376	root	1.1	}
377
378	root	1.3	rxvt_img *
379	root	1.11	rxvt_img::clone ()
380	root	1.3	{
381	root	1.32	return new rxvt_img (*this);
382	root	1.3	}
383
384	root	1.46	static XRenderPictFormat *
385			find_alpha_format_for (Display dpy, XRenderPictFormat format)
386			{
387			if (format->direct.alphaMask)
388			return format; // already has alpha
389
390			// try to find a suitable alpha format, one bit alpha is enough for our purposes
391			if (format->type == PictTypeDirect)
392			for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
393			if (f->direct.alphaMask
394			&& f->type == PictTypeDirect
395			&& ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
396			&& ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
397			&& ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
398			return f;
399
400			// should be a very good fallback
401			return XRenderFindStandardFormat (dpy, PictStandardARGB32);
402			}
403
404	root	1.3	rxvt_img *
405	root	1.33	rxvt_img::reify ()
406	root	1.19	{
407	root	1.35	if (x == 0 && y == 0 && w == ref->w && h == ref->h)
408			return clone ();
409
410	root	1.40	Display *dpy = s->display->dpy;
411
412	root	1.62	// add an alpha channel if...
413			bool alpha = !format->direct.alphaMask // pixmap has none yet
414			&& (x \|\| y) // we need one because of non-zero offset
415			&& repeat == RepeatNone; // and we have no good pixels to fill with
416	root	1.40
417	root	1.46	rxvt_img *img = new rxvt_img (s, alpha ? find_alpha_format_for (dpy, format) : format, 0, 0, w, h, repeat);
418	root	1.32	img->alloc ();
419	root	1.19
420	root	1.34	Picture src = src_picture ();
421			Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
422	root	1.33
423	root	1.42	if (alpha)
424			{
425			XRenderColor rc = { 0, 0, 0, 0 };
426	root	1.44	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
427	root	1.42	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, -x, -y, ref->w, ref->h);
428			}
429			else
430			XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, w, h);
431
432	root	1.33	XRenderFreePicture (dpy, src);
433			XRenderFreePicture (dpy, dst);
434	root	1.19
435	root	1.33	return img;
436			}
437	root	1.19
438	root	1.33	rxvt_img *
439			rxvt_img::sub_rect (int x, int y, int width, int height)
440			{
441			rxvt_img *img = clone ();
442
443			img->x += x;
444			img->y += y;
445	root	1.19
446	root	1.37	if (w != width \|\| h != height)
447			{
448			img->w = width;
449			img->h = height;
450
451	root	1.39	rxvt_img *img2 = img->reify ();
452			delete img;
453			img = img2;
454	root	1.37	}
455	root	1.36
456	root	1.19	return img;
457			}
458
459			rxvt_img *
460	root	1.30	rxvt_img::transform (int new_width, int new_height, double matrix[9])
461	root	1.3	{
462	root	1.41	rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height, repeat);
463	root	1.32	img->alloc ();
464	root	1.12
465			Display *dpy = s->display->dpy;
466	root	1.34	Picture src = src_picture ();
467			Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
468	root	1.12
469			XTransform xfrm;
470
471			for (int i = 0; i < 3; ++i)
472			for (int j = 0; j < 3; ++j)
473			xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]);
474
475	root	1.44	#if 0
476			xfrm.matrix [0][2] -= XDoubleToFixed (x);//TODO
477			xfrm.matrix [1][2] -= XDoubleToFixed (y);
478			#endif
479	root	1.33
480	root	1.17	XRenderSetPictureFilter (dpy, src, "good", 0, 0);
481	root	1.12	XRenderSetPictureTransform (dpy, src, &xfrm);
482			XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height);
483
484			XRenderFreePicture (dpy, src);
485			XRenderFreePicture (dpy, dst);
486
487			return img;
488	root	1.3	}
489
490			rxvt_img *
491			rxvt_img::scale (int new_width, int new_height)
492			{
493	sf-exg	1.43	if (w == new_width && h == new_height)
494			return clone ();
495
496	root	1.11	double matrix[9] = {
497	root	1.16	w / (double)new_width, 0, 0,
498			0, h / (double)new_height, 0,
499	root	1.11	0, 0, 1
500			};
501
502	root	1.42	int old_repeat_mode = repeat;
503			repeat = RepeatPad; // not right, but xrender can't proeprly scale it seems
504
505			rxvt_img *img = transform (new_width, new_height, matrix);
506
507			repeat = old_repeat_mode;
508			img->repeat = repeat;
509
510			return img;
511	root	1.3	}
512
513	sf-exg	1.7	rxvt_img *
514	root	1.30	rxvt_img::rotate (int new_width, int new_height, int x, int y, double phi)
515	root	1.17	{
516			double s = sin (phi);
517			double c = cos (phi);
518
519			double matrix[9] = {
520			c, -s, -c * x + s * y + x,
521			s, c, -s * x - c * y + y,
522			0, 0, 1
523			};
524
525	root	1.30	return transform (new_width, new_height, matrix);
526	root	1.17	}
527
528			rxvt_img *
529	root	1.45	rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg)
530	sf-exg	1.7	{
531	root	1.32	if (new_format == format)
532			return clone ();
533
534	root	1.45	rxvt_img *img = new rxvt_img (s, new_format, x, y, w, h, repeat);
535	root	1.32	img->alloc ();
536	root	1.9
537	sf-exg	1.7	Display *dpy = s->display->dpy;
538	root	1.34	Picture src = src_picture ();
539	root	1.8	Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
540	root	1.27	int op = PictOpSrc;
541	sf-exg	1.7
542	root	1.29	if (format->direct.alphaMask && !new_format->direct.alphaMask)
543	root	1.27	{
544			// does it have to be that complicated
545			rgba c;
546			bg.get (c);
547
548			XRenderColor rc = { c.r, c.g, c.b, 0xffff };
549	root	1.28	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);
550	root	1.27
551			op = PictOpOver;
552			}
553
554			XRenderComposite (dpy, op, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
555	sf-exg	1.7
556			XRenderFreePicture (dpy, src);
557			XRenderFreePicture (dpy, dst);
558
559			return img;
560			}
561	root	1.3
562	sf-exg	1.24	rxvt_img *
563			rxvt_img::blend (rxvt_img *img, double factor)
564			{
565			rxvt_img *img2 = clone ();
566			Display *dpy = s->display->dpy;
567	sf-exg	1.38	Picture src = img->src_picture ();
568	sf-exg	1.24	Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
569			Picture mask = create_xrender_mask (dpy, img->pm, False);
570
571			XRenderColor mask_c;
572
573			mask_c.alpha = float_to_component (factor);
574			mask_c.red =
575			mask_c.green =
576			mask_c.blue = 0;
577			XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);
578
579			XRenderComposite (dpy, PictOpOver, src, mask, dst, 0, 0, 0, 0, 0, 0, w, h);
580
581			XRenderFreePicture (dpy, src);
582			XRenderFreePicture (dpy, dst);
583			XRenderFreePicture (dpy, mask);
584
585			return img2;
586			}
587
588	root	1.1	#endif
589