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 width, int height)
: s(screen), x(0), y(0), w(width), h(height), format(format), repeat(RepeatNormal), shared(false)
{
  pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
}

rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int width, int height, Pixmap pixmap)
: s(screen), x(0), y(0), w(width), h(height), format(format), repeat(RepeatNormal), shared(false), pm(pixmap)
{
}

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)),
     root_pm_w,
     root_pm_h,
     root_pixmap
  );

  img->shared = true;

  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 rxvt_img (
     s,
     XRenderFindStandardFormat (s->display->dpy, gdk_pixbuf_get_has_alpha (pb) ? PictStandardARGB32 : PictStandardRGB24),
     gdk_pixbuf_get_width (pb),
     gdk_pixbuf_get_height (pb)
  );

  img->render_pixbuf (pb, 0, 0, img->w, img->h, 0, 0);

  g_object_unref (pb);

  return img;
}

rxvt_img::~rxvt_img ()
{
  if (!shared)
    XFreePixmap (s->display->dpy, pm);
}

void
rxvt_img::unshare ()
{
  if (!shared)
    return;

  rxvt_img *img = clone ();

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

  delete img;
}

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, w, h);

  XRenderPictureAttributes pa;

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

  Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);
  Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);
  XFreePixmap (dpy, tmp_pm);

  if (kernel && params)
    {
      size = rh * 2 + 1;
      get_gaussian_kernel (rh, size, kernel, params);

      XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
      XRenderComposite (dpy,
                        PictOpSrc,
                        src,
                        None,
                        tmp,
                        0, 0,
                        0, 0,
                        0, 0,
                        w, h);

      size = rv * 2 + 1;
      get_gaussian_kernel (rv, size, kernel, params);
      ::swap (params[0], params[1]);

      XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
      XRenderComposite (dpy,
                        PictOpSrc,
                        tmp,
                        None,
                        dst,
                        0, 0,
                        0, 0,
                        0, 0,
                        w, h);
    }

  free (kernel);
  free (params);
  XRenderFreePicture (dpy, src);
  XRenderFreePicture (dpy, dst);
  XRenderFreePicture (dpy, tmp);

  return img;
}

static Picture
create_xrender_mask (Display *dpy, Drawable drawable, Bool argb)
{
  Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);

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

  XFreePixmap (dpy, pixmap);

  return mask;
}

void
rxvt_img::brightness (unsigned short r, unsigned short g, unsigned short b, unsigned short a)
{
  Display *dpy = s->display->dpy;
  Picture src = create_xrender_mask (dpy, pm, True);
  Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);

  XRenderColor mask_c;
  mask_c.red   = r;
  mask_c.green = g;
  mask_c.blue  = b;
  mask_c.alpha = a;
  XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);

  XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);

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

void
rxvt_img::contrast (unsigned short r, unsigned short g, unsigned short b, unsigned short a)
{
  if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL))
    return;

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

  XRenderColor mask_c;
  mask_c.red   = r;
  mask_c.green = g;
  mask_c.blue  = b;
  mask_c.alpha = a;
  XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);

  XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);

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

bool
rxvt_img::render_pixbuf (GdkPixbuf *pixbuf, int src_x, int src_y, int width, int height, int dst_x, int dst_y)
{
  Display *dpy = s->display->dpy;

  if (s->visual->c_class != TrueColor)
    return false;

  uint32_t red_mask, green_mask, blue_mask, alpha_mask;

  red_mask   = (uint32_t)format->direct.redMask   << format->direct.red;
  green_mask = (uint32_t)format->direct.greenMask << format->direct.green;
  blue_mask  = (uint32_t)format->direct.blueMask  << format->direct.blue;
  alpha_mask = (uint32_t)format->direct.alphaMask << format->direct.alpha;

  int width_r = ecb_popcount32 (red_mask);
  int width_g = ecb_popcount32 (green_mask);
  int width_b = ecb_popcount32 (blue_mask);
  int width_a = ecb_popcount32 (alpha_mask);

  if (width_r > 8 || width_g > 8 || width_b > 8 || width_a > 8)
    return false;

  int sh_r = ecb_ctz32 (red_mask);
  int sh_g = ecb_ctz32 (green_mask);
  int sh_b = ecb_ctz32 (blue_mask);
  int sh_a = ecb_ctz32 (alpha_mask);

  if (width > 32767 || height > 32767)
    return false;

  XImage *ximage = XCreateImage (dpy, s->visual, format->depth, ZPixmap, 0, 0,
                                 width, height, 32, 0);
  if (!ximage)
    return false;

  if (height > INT_MAX / ximage->bytes_per_line
      || !(ximage->data = (char *)malloc (height * ximage->bytes_per_line)))
    {
      XDestroyImage (ximage);
      return false;
    }

  GC gc = XCreateGC (dpy, pm, 0, 0);

  ximage->byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;

  int rowstride = gdk_pixbuf_get_rowstride (pixbuf);
  int channels = gdk_pixbuf_get_n_channels (pixbuf);
  unsigned char *row = gdk_pixbuf_get_pixels (pixbuf) + src_y * rowstride + src_x * channels;
  char *line = ximage->data;

  for (int y = 0; y < height; y++)
    {
      for (int x = 0; x < width; x++)
        {
          unsigned char *pixel = row + x * channels;
          uint32_t value;
          unsigned char r, g, b, a;

          if (channels == 4)
            {
              a = pixel[3];
              r = pixel[0] * a / 0xff;
              g = pixel[1] * a / 0xff;
              b = pixel[2] * a / 0xff;
            }
          else
            {
              a = 0xff;
              r = pixel[0];
              g = pixel[1];
              b = pixel[2];
            }

          value  = ((r >> (8 - width_r)) << sh_r)
                 | ((g >> (8 - width_g)) << sh_g)
                 | ((b >> (8 - width_b)) << sh_b)
                 | ((a >> (8 - width_a)) << sh_a);

          if (ximage->bits_per_pixel == 32)
            ((uint32_t *)line)[x] = value;
          else
            XPutPixel (ximage, x, y, value);
        }

      row += rowstride;
      line += ximage->bytes_per_line;
    }

  XPutImage (dpy, pm, gc, ximage, 0, 0, dst_x, dst_y, width, height);
  XDestroyImage (ximage);
  XFreeGC (dpy, gc);

  return true;
}

rxvt_img *
rxvt_img::clone ()
{
  rxvt_img *img = new rxvt_img (s, format, w, h);

  GC gc = XCreateGC (s->display->dpy, pm, 0, 0);
  XCopyArea (s->display->dpy, pm, img->pm, gc, 0, 0, w, h, 0, 0);
  XFreeGC (s->display->dpy, gc);

  return img;
}

rxvt_img *
rxvt_img::sub_rect (int x, int y, int width, int height)
{
  rxvt_img *img = new rxvt_img (s, format, width, height);

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

  XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, width, height);

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

  return img;
}

rxvt_img *
rxvt_img::transform (int new_width, int new_height, double matrix[9])
{
  rxvt_img *img = new rxvt_img (s, format, new_width, new_height);

  Display *dpy = s->display->dpy;
  XRenderPictureAttributes pa;
  pa.repeat = repeat;
  Picture src = XRenderCreatePicture (dpy,      pm,      format, CPRepeat, &pa);
  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]);

  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)
{
  double matrix[9] = {
    w  / (double)new_width, 0, 0,
    0, h / (double)new_height, 0,
    0,                      0, 1
  };

  return transform (new_width, new_height, matrix);
}

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_to (XRenderPictFormat *new_format, const rxvt_color &bg)
{
  rxvt_img *img = new rxvt_img (s, new_format, w, h);

  Display *dpy = s->display->dpy;
  Picture src = XRenderCreatePicture (dpy,      pm,     format, 0, 0);
  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 = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
  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:	1.31
Committed:	Thu Jun 7 06:08:09 2012 UTC (11 years, 11 months ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
Changes since 1.30:	+10 -12 lines
Log Message:	Add versions of contrast/brightness that take integer arguments.
#	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	1.3	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int width, int height)
8	root	1.30	: s(screen), x(0), y(0), w(width), h(height), format(format), repeat(RepeatNormal), shared(false)
9	root	1.1	{
10	root	1.3	pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
11	root	1.1	}
12
13	root	1.3	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int width, int height, Pixmap pixmap)
14	root	1.30	: s(screen), x(0), y(0), w(width), h(height), format(format), repeat(RepeatNormal), shared(false), pm(pixmap)
15	root	1.1	{
16			}
17
18	root	1.4	rxvt_img *
19	sf-exg	1.21	rxvt_img::new_from_root (rxvt_screen *s)
20			{
21			Display *dpy = s->display->dpy;
22			unsigned int root_pm_w, root_pm_h;
23			Pixmap root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_XROOTPMAP_ID]);
24			if (root_pixmap == None)
25			root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_ESETROOT_PMAP_ID]);
26
27			if (root_pixmap == None)
28			return 0;
29
30			Window wdummy;
31			int idummy;
32			unsigned int udummy;
33
34			if (!XGetGeometry (dpy, root_pixmap, &wdummy, &idummy, &idummy, &root_pm_w, &root_pm_h, &udummy, &udummy))
35			return 0;
36
37			rxvt_img *img = new rxvt_img (
38			s,
39			XRenderFindVisualFormat (dpy, DefaultVisual (dpy, s->display->screen)),
40			root_pm_w,
41			root_pm_h,
42			root_pixmap
43			);
44
45			img->shared = true;
46
47			return img;
48			}
49
50			rxvt_img *
51	root	1.4	rxvt_img::new_from_file (rxvt_screen s, const char filename)
52			{
53	root	1.11	GError *err = 0;
54	root	1.4	GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
55
56			if (!pb)
57	root	1.11	rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
58	root	1.4
59			rxvt_img *img = new rxvt_img (
60			s,
61			XRenderFindStandardFormat (s->display->dpy, gdk_pixbuf_get_has_alpha (pb) ? PictStandardARGB32 : PictStandardRGB24),
62			gdk_pixbuf_get_width (pb),
63			gdk_pixbuf_get_height (pb)
64			);
65
66	root	1.14	img->render_pixbuf (pb, 0, 0, img->w, img->h, 0, 0);
67	root	1.4
68	sf-exg	1.26	g_object_unref (pb);
69
70	root	1.4	return img;
71			}
72
73	root	1.1	rxvt_img::~rxvt_img ()
74			{
75	root	1.4	if (!shared)
76	root	1.1	XFreePixmap (s->display->dpy, pm);
77			}
78
79			void
80	root	1.11	rxvt_img::unshare ()
81			{
82			if (!shared)
83			return;
84
85			rxvt_img *img = clone ();
86
87			::swap (pm , img->pm);
88			::swap (shared, img->shared);
89
90			delete img;
91			}
92
93			void
94	root	1.1	rxvt_img::fill (const rxvt_color &c)
95			{
96			XGCValues gcv;
97			gcv.foreground = c;
98			GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv);
99			XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h);
100	root	1.3	XFreeGC (s->display->dpy, gc);
101	root	1.1	}
102
103	sf-exg	1.6	static void
104			get_gaussian_kernel (int radius, int width, double kernel, XFixed params)
105			{
106			double sigma = radius / 2.0;
107			double scale = sqrt (2.0 * M_PI) * sigma;
108			double sum = 0.0;
109
110			for (int i = 0; i < width; i++)
111			{
112			double x = i - width / 2;
113			kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
114			sum += kernel[i];
115			}
116
117			params[0] = XDoubleToFixed (width);
118			params[1] = XDoubleToFixed (1);
119
120			for (int i = 0; i < width; i++)
121			params[i+2] = XDoubleToFixed (kernel[i] / sum);
122			}
123
124	sf-exg	1.22	rxvt_img *
125	root	1.3	rxvt_img::blur (int rh, int rv)
126			{
127	sf-exg	1.6	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
128	sf-exg	1.22	return clone ();
129	sf-exg	1.6
130			Display *dpy = s->display->dpy;
131			int size = max (rh, rv) * 2 + 1;
132			double kernel = (double )malloc (size * sizeof (double));
133			XFixed params = (XFixed )malloc ((size + 2) * sizeof (XFixed));
134	sf-exg	1.22	rxvt_img *img = new rxvt_img (s, format, w, h);
135	sf-exg	1.6
136			XRenderPictureAttributes pa;
137
138			pa.repeat = RepeatPad;
139	sf-exg	1.22	Picture src = XRenderCreatePicture (dpy, pm , format, CPRepeat, &pa);
140			Picture dst = XRenderCreatePicture (dpy, img->pm, format, CPRepeat, &pa);
141
142			Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);
143			Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);
144			XFreePixmap (dpy, tmp_pm);
145	sf-exg	1.6
146			if (kernel && params)
147			{
148			size = rh * 2 + 1;
149			get_gaussian_kernel (rh, size, kernel, params);
150
151			XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
152			XRenderComposite (dpy,
153			PictOpSrc,
154			src,
155			None,
156	sf-exg	1.22	tmp,
157	sf-exg	1.6	0, 0,
158			0, 0,
159			0, 0,
160			w, h);
161
162			size = rv * 2 + 1;
163			get_gaussian_kernel (rv, size, kernel, params);
164			::swap (params[0], params[1]);
165
166			XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
167			XRenderComposite (dpy,
168			PictOpSrc,
169	sf-exg	1.22	tmp,
170	sf-exg	1.6	None,
171			dst,
172			0, 0,
173			0, 0,
174			0, 0,
175			w, h);
176			}
177
178			free (kernel);
179			free (params);
180			XRenderFreePicture (dpy, src);
181			XRenderFreePicture (dpy, dst);
182	sf-exg	1.22	XRenderFreePicture (dpy, tmp);
183
184			return img;
185	sf-exg	1.6	}
186
187			static Picture
188			create_xrender_mask (Display *dpy, Drawable drawable, Bool argb)
189			{
190			Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);
191
192			XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8);
193			XRenderPictureAttributes pa;
194			pa.repeat = True;
195			Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa);
196
197			XFreePixmap (dpy, pixmap);
198
199			return mask;
200	root	1.3	}
201
202			void
203	sf-exg	1.31	rxvt_img::brightness (unsigned short r, unsigned short g, unsigned short b, unsigned short a)
204	root	1.3	{
205	sf-exg	1.6	Display *dpy = s->display->dpy;
206			Picture src = create_xrender_mask (dpy, pm, True);
207			Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
208
209			XRenderColor mask_c;
210	sf-exg	1.31	mask_c.red = r;
211			mask_c.green = g;
212			mask_c.blue = b;
213			mask_c.alpha = a;
214	sf-exg	1.6	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
215
216			XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
217	sf-exg	1.23
218			XRenderFreePicture (dpy, src);
219			XRenderFreePicture (dpy, dst);
220	root	1.3	}
221
222			void
223	sf-exg	1.31	rxvt_img::contrast (unsigned short r, unsigned short g, unsigned short b, unsigned short a)
224	root	1.1	{
225	sf-exg	1.6	if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL))
226			return;
227
228			Display *dpy = s->display->dpy;
229			Picture src = create_xrender_mask (dpy, pm, True);
230			Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
231
232			XRenderColor mask_c;
233	sf-exg	1.31	mask_c.red = r;
234			mask_c.green = g;
235			mask_c.blue = b;
236			mask_c.alpha = a;
237	sf-exg	1.6	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
238
239			XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
240	sf-exg	1.23
241			XRenderFreePicture (dpy, src);
242			XRenderFreePicture (dpy, dst);
243	root	1.1	}
244
245	root	1.14	bool
246			rxvt_img::render_pixbuf (GdkPixbuf *pixbuf, int src_x, int src_y, int width, int height, int dst_x, int dst_y)
247	root	1.3	{
248	root	1.14	Display *dpy = s->display->dpy;
249
250			if (s->visual->c_class != TrueColor)
251			return false;
252
253			uint32_t red_mask, green_mask, blue_mask, alpha_mask;
254
255	sf-exg	1.18	red_mask = (uint32_t)format->direct.redMask << format->direct.red;
256			green_mask = (uint32_t)format->direct.greenMask << format->direct.green;
257			blue_mask = (uint32_t)format->direct.blueMask << format->direct.blue;
258			alpha_mask = (uint32_t)format->direct.alphaMask << format->direct.alpha;
259	root	1.14
260			int width_r = ecb_popcount32 (red_mask);
261			int width_g = ecb_popcount32 (green_mask);
262			int width_b = ecb_popcount32 (blue_mask);
263			int width_a = ecb_popcount32 (alpha_mask);
264
265			if (width_r > 8 \|\| width_g > 8 \|\| width_b > 8 \|\| width_a > 8)
266			return false;
267
268			int sh_r = ecb_ctz32 (red_mask);
269			int sh_g = ecb_ctz32 (green_mask);
270			int sh_b = ecb_ctz32 (blue_mask);
271			int sh_a = ecb_ctz32 (alpha_mask);
272
273			if (width > 32767 \|\| height > 32767)
274			return false;
275
276	sf-exg	1.18	XImage *ximage = XCreateImage (dpy, s->visual, format->depth, ZPixmap, 0, 0,
277	root	1.14	width, height, 32, 0);
278			if (!ximage)
279			return false;
280
281			if (height > INT_MAX / ximage->bytes_per_line
282			\|\| !(ximage->data = (char )malloc (height ximage->bytes_per_line)))
283			{
284			XDestroyImage (ximage);
285			return false;
286			}
287
288			GC gc = XCreateGC (dpy, pm, 0, 0);
289
290			ximage->byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
291
292			int rowstride = gdk_pixbuf_get_rowstride (pixbuf);
293			int channels = gdk_pixbuf_get_n_channels (pixbuf);
294			unsigned char row = gdk_pixbuf_get_pixels (pixbuf) + src_y rowstride + src_x * channels;
295			char *line = ximage->data;
296
297			for (int y = 0; y < height; y++)
298			{
299			for (int x = 0; x < width; x++)
300			{
301			unsigned char pixel = row + x channels;
302			uint32_t value;
303			unsigned char r, g, b, a;
304
305			if (channels == 4)
306			{
307			a = pixel[3];
308	sf-exg	1.25	r = pixel[0] * a / 0xff;
309			g = pixel[1] * a / 0xff;
310			b = pixel[2] * a / 0xff;
311	root	1.14	}
312			else
313			{
314			a = 0xff;
315			r = pixel[0];
316			g = pixel[1];
317			b = pixel[2];
318			}
319
320			value = ((r >> (8 - width_r)) << sh_r)
321			\| ((g >> (8 - width_g)) << sh_g)
322			\| ((b >> (8 - width_b)) << sh_b)
323			\| ((a >> (8 - width_a)) << sh_a);
324
325			if (ximage->bits_per_pixel == 32)
326			((uint32_t *)line)[x] = value;
327			else
328			XPutPixel (ximage, x, y, value);
329			}
330
331			row += rowstride;
332			line += ximage->bytes_per_line;
333			}
334
335			XPutImage (dpy, pm, gc, ximage, 0, 0, dst_x, dst_y, width, height);
336			XDestroyImage (ximage);
337			XFreeGC (dpy, gc);
338
339			return true;
340	root	1.3	}
341
342			rxvt_img *
343	root	1.11	rxvt_img::clone ()
344	root	1.3	{
345	root	1.19	rxvt_img *img = new rxvt_img (s, format, w, h);
346
347	root	1.3	GC gc = XCreateGC (s->display->dpy, pm, 0, 0);
348	root	1.19	XCopyArea (s->display->dpy, pm, img->pm, gc, 0, 0, w, h, 0, 0);
349	root	1.3	XFreeGC (s->display->dpy, gc);
350	root	1.20
351			return img;
352	root	1.3	}
353
354			rxvt_img *
355	root	1.30	rxvt_img::sub_rect (int x, int y, int width, int height)
356	root	1.19	{
357			rxvt_img *img = new rxvt_img (s, format, width, height);
358
359			Display *dpy = s->display->dpy;
360			XRenderPictureAttributes pa;
361			pa.repeat = repeat;
362			Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
363			Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
364
365			XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, width, height);
366
367			XRenderFreePicture (dpy, src);
368			XRenderFreePicture (dpy, dst);
369
370			return img;
371			}
372
373			rxvt_img *
374	root	1.30	rxvt_img::transform (int new_width, int new_height, double matrix[9])
375	root	1.3	{
376	root	1.12	rxvt_img *img = new rxvt_img (s, format, new_width, new_height);
377
378			Display *dpy = s->display->dpy;
379	root	1.13	XRenderPictureAttributes pa;
380			pa.repeat = repeat;
381			Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
382			Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
383	root	1.12
384			XTransform xfrm;
385
386			for (int i = 0; i < 3; ++i)
387			for (int j = 0; j < 3; ++j)
388			xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]);
389
390	root	1.17	XRenderSetPictureFilter (dpy, src, "good", 0, 0);
391	root	1.12	XRenderSetPictureTransform (dpy, src, &xfrm);
392			XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height);
393
394			XRenderFreePicture (dpy, src);
395			XRenderFreePicture (dpy, dst);
396
397			return img;
398	root	1.3	}
399
400			rxvt_img *
401			rxvt_img::scale (int new_width, int new_height)
402			{
403	root	1.11	double matrix[9] = {
404	root	1.16	w / (double)new_width, 0, 0,
405			0, h / (double)new_height, 0,
406	root	1.11	0, 0, 1
407			};
408
409	root	1.19	return transform (new_width, new_height, matrix);
410	root	1.3	}
411
412	sf-exg	1.7	rxvt_img *
413	root	1.30	rxvt_img::rotate (int new_width, int new_height, int x, int y, double phi)
414	root	1.17	{
415			double s = sin (phi);
416			double c = cos (phi);
417
418			double matrix[9] = {
419			c, -s, -c * x + s * y + x,
420			s, c, -s * x - c * y + y,
421			0, 0, 1
422			};
423
424	root	1.30	return transform (new_width, new_height, matrix);
425	root	1.17	}
426
427			rxvt_img *
428	root	1.27	rxvt_img::convert_to (XRenderPictFormat *new_format, const rxvt_color &bg)
429	sf-exg	1.7	{
430	sf-exg	1.10	rxvt_img *img = new rxvt_img (s, new_format, w, h);
431	root	1.9
432	sf-exg	1.7	Display *dpy = s->display->dpy;
433	root	1.12	Picture src = XRenderCreatePicture (dpy, pm, format, 0, 0);
434	root	1.8	Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
435	root	1.27	int op = PictOpSrc;
436	sf-exg	1.7
437	root	1.29	if (format->direct.alphaMask && !new_format->direct.alphaMask)
438	root	1.27	{
439			// does it have to be that complicated
440			rgba c;
441			bg.get (c);
442
443			XRenderColor rc = { c.r, c.g, c.b, 0xffff };
444	root	1.28	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);
445	root	1.27
446			op = PictOpOver;
447			}
448
449			XRenderComposite (dpy, op, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
450	sf-exg	1.7
451			XRenderFreePicture (dpy, src);
452			XRenderFreePicture (dpy, dst);
453
454			return img;
455			}
456	root	1.3
457	sf-exg	1.24	rxvt_img *
458			rxvt_img::blend (rxvt_img *img, double factor)
459			{
460			rxvt_img *img2 = clone ();
461			Display *dpy = s->display->dpy;
462			Picture src = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
463			Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
464			Picture mask = create_xrender_mask (dpy, img->pm, False);
465
466			XRenderColor mask_c;
467
468			mask_c.alpha = float_to_component (factor);
469			mask_c.red =
470			mask_c.green =
471			mask_c.blue = 0;
472			XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);
473
474			XRenderComposite (dpy, PictOpOver, src, mask, dst, 0, 0, 0, 0, 0, 0, w, h);
475
476			XRenderFreePicture (dpy, src);
477			XRenderFreePicture (dpy, dst);
478			XRenderFreePicture (dpy, mask);
479
480			return img2;
481			}
482
483	root	1.1	#endif
484