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/cvs/rxvt-unicode/src/rxvtimg.C
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Comparing rxvt-unicode/src/rxvtimg.C (file contents):
Revision 1.45 by root, Thu Jun 7 17:21:56 2012 UTC vs.
Revision 1.51 by root, Thu Jun 7 20:04:54 2012 UTC

… …
57 57
58 return img; 58 return img;
59} 59}
60 60
61rxvt_img * 61rxvt_img *
62rxvt_img::new_from_pixbuf (rxvt_screen *s, GdkPixbuf *pb)
63{
64 Display *dpy = s->display->dpy;
65
66 int width = gdk_pixbuf_get_width (pb);
67 int height = gdk_pixbuf_get_height (pb);
68
69 if (width > 32767 || height > 32767) // well, we *could* upload in chunks
70 rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n");
71
72 // since we require rgb24/argb32 formats from xrender we assume
73 // that both 24 and 32 bpp MUST be supported by any screen that supports xrender
74 int depth = gdk_pixbuf_get_has_alpha (pb) ? 32 : 24;
75
76 XImage xi;
77
78 xi.width = width;
79 xi.height = height;
80 xi.xoffset = 0;
81 xi.format = ZPixmap;
82 xi.byte_order = LSBFirst; // maybe go for host byte order, because servers are usually local?
83 xi.bitmap_unit = 32; //XY only, unused
84 xi.bitmap_bit_order = LSBFirst; //XY only, unused
85 xi.bitmap_pad = BitmapPad (dpy);
86 xi.depth = depth;
87 xi.bytes_per_line = 0;
88 xi.bits_per_pixel = 32; //Z only
89 xi.red_mask = 0x000000ff; //Z only
90 xi.green_mask = 0x0000ff00; //Z only
91 xi.blue_mask = 0x00ff0000; //Z only
92 xi.obdata = 0; // probbaly unused
93
94 if (!XInitImage (&xi))
95 rxvt_fatal ("unable to initialise ximage, please report.\n");
96
97 if (height > INT_MAX / xi.bytes_per_line)
98 rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n");
99
100 xi.data = (char *)rxvt_malloc (height * xi.bytes_per_line);
101
102 int rowstride = gdk_pixbuf_get_rowstride (pb);
103
104 assert (3 + (depth == 32) == gdk_pixbuf_get_n_channels (pb));
105 unsigned char *row = gdk_pixbuf_get_pixels (pb);
106 char *line = xi.data;
107
108 for (int y = 0; y < height; y++)
109 {
110 unsigned char *src = row;
111 uint32_t *dst = (uint32_t *)line;
112
113 if (depth == 24)
114 for (int x = 0; x < width; x++)
115 {
116 uint8_t r = *src++;
117 uint8_t g = *src++;
118 uint8_t b = *src++;
119
120 uint32_t v = r | (g << 8) | (b << 16);
121
122 if (ecb_big_endian ())
123 v = ecb_bswap32 (v);
124
125 *dst++ = v;
126 }
127 else
128 for (int x = 0; x < width; x++)
129 {
130 uint32_t v = *(uint32_t *)src; src += 4;
131
132 if (ecb_big_endian ())
133 v = ecb_bswap32 (v);
134
135 *dst++ = v;
136 }
137
138 row += rowstride;
139 line += xi.bytes_per_line;
140 }
141
142 rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, depth == 24 ? PictStandardRGB24 : PictStandardARGB32), 0, 0, width, height);
143 img->alloc ();
144
145 GC gc = XCreateGC (dpy, img->pm, 0, 0);
146 XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);
147 XFreeGC (dpy, gc);
148
149 free (xi.data);
150
151 return img;
152}
153
154rxvt_img *
62rxvt_img::new_from_file (rxvt_screen *s, const char *filename) 155rxvt_img::new_from_file (rxvt_screen *s, const char *filename)
63{ 156{
64 GError *err = 0; 157 GError *err = 0;
65 GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err); 158 GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
66 159
67 if (!pb) 160 if (!pb)
68 rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message); 161 rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
69 162
70 rxvt_img *img = new rxvt_img ( 163 rxvt_img *img = new_from_pixbuf (s, pb);
71 s,
72 XRenderFindStandardFormat (s->display->dpy, gdk_pixbuf_get_has_alpha (pb) ? PictStandardARGB32 : PictStandardRGB24),
73 0,
74 0,
75 gdk_pixbuf_get_width (pb),
76 gdk_pixbuf_get_height (pb)
77 );
78 img->alloc ();
79 img->render_pixbuf (pb, 0, 0, img->w, img->h, 0, 0);
80 164
81 g_object_unref (pb); 165 g_object_unref (pb);
82 166
83 return img; 167 return img;
84} 168}
… …
288 372
289 XRenderFreePicture (dpy, src); 373 XRenderFreePicture (dpy, src);
290 XRenderFreePicture (dpy, dst); 374 XRenderFreePicture (dpy, dst);
291} 375}
292 376
293bool
294rxvt_img::render_pixbuf (GdkPixbuf *pixbuf, int src_x, int src_y, int width, int height, int dst_x, int dst_y)
295{
296 Display *dpy = s->display->dpy;
297
298 if (s->visual->c_class != TrueColor)
299 return false;
300
301 uint32_t red_mask, green_mask, blue_mask, alpha_mask;
302
303 red_mask = (uint32_t)format->direct.redMask << format->direct.red;
304 green_mask = (uint32_t)format->direct.greenMask << format->direct.green;
305 blue_mask = (uint32_t)format->direct.blueMask << format->direct.blue;
306 alpha_mask = (uint32_t)format->direct.alphaMask << format->direct.alpha;
307
308 int width_r = ecb_popcount32 (red_mask);
309 int width_g = ecb_popcount32 (green_mask);
310 int width_b = ecb_popcount32 (blue_mask);
311 int width_a = ecb_popcount32 (alpha_mask);
312
313 if (width_r > 8 || width_g > 8 || width_b > 8 || width_a > 8)
314 return false;
315
316 int sh_r = ecb_ctz32 (red_mask);
317 int sh_g = ecb_ctz32 (green_mask);
318 int sh_b = ecb_ctz32 (blue_mask);
319 int sh_a = ecb_ctz32 (alpha_mask);
320
321 if (width > 32767 || height > 32767)
322 return false;
323
324 XImage *ximage = XCreateImage (dpy, s->visual, format->depth, ZPixmap, 0, 0,
325 width, height, 32, 0);
326 if (!ximage)
327 return false;
328
329 if (height > INT_MAX / ximage->bytes_per_line
330 || !(ximage->data = (char *)malloc (height * ximage->bytes_per_line)))
331 {
332 XDestroyImage (ximage);
333 return false;
334 }
335
336 GC gc = XCreateGC (dpy, pm, 0, 0);
337
338 ximage->byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
339
340 int rowstride = gdk_pixbuf_get_rowstride (pixbuf);
341 int channels = gdk_pixbuf_get_n_channels (pixbuf);
342 unsigned char *row = gdk_pixbuf_get_pixels (pixbuf) + src_y * rowstride + src_x * channels;
343 char *line = ximage->data;
344
345 for (int y = 0; y < height; y++)
346 {
347 for (int x = 0; x < width; x++)
348 {
349 unsigned char *pixel = row + x * channels;
350 uint32_t value;
351 unsigned char r, g, b, a;
352
353 if (channels == 4)
354 {
355 a = pixel[3];
356 r = pixel[0] * a / 0xff;
357 g = pixel[1] * a / 0xff;
358 b = pixel[2] * a / 0xff;
359 }
360 else
361 {
362 a = 0xff;
363 r = pixel[0];
364 g = pixel[1];
365 b = pixel[2];
366 }
367
368 value = ((r >> (8 - width_r)) << sh_r)
369 | ((g >> (8 - width_g)) << sh_g)
370 | ((b >> (8 - width_b)) << sh_b)
371 | ((a >> (8 - width_a)) << sh_a);
372
373 if (ximage->bits_per_pixel == 32)
374 ((uint32_t *)line)[x] = value;
375 else
376 XPutPixel (ximage, x, y, value);
377 }
378
379 row += rowstride;
380 line += ximage->bytes_per_line;
381 }
382
383 XPutImage (dpy, pm, gc, ximage, 0, 0, dst_x, dst_y, width, height);
384 XDestroyImage (ximage);
385 XFreeGC (dpy, gc);
386
387 return true;
388}
389
390rxvt_img * 377rxvt_img *
391rxvt_img::clone () 378rxvt_img::clone ()
392{ 379{
393 return new rxvt_img (*this); 380 return new rxvt_img (*this);
381}
382
383static XRenderPictFormat *
384find_alpha_format_for (Display *dpy, XRenderPictFormat *format)
385{
386 if (format->direct.alphaMask)
387 return format; // already has alpha
388
389 // try to find a suitable alpha format, one bit alpha is enough for our purposes
390 if (format->type == PictTypeDirect)
391 for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
392 if (f->direct.alphaMask
393 && f->type == PictTypeDirect
394 && ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
395 && ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
396 && ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
397 return f;
398
399 // should be a very good fallback
400 return XRenderFindStandardFormat (dpy, PictStandardARGB32);
394} 401}
395 402
396rxvt_img * 403rxvt_img *
397rxvt_img::reify () 404rxvt_img::reify ()
398{ 405{
… …
403 410
404 bool alpha = !format->direct.alphaMask 411 bool alpha = !format->direct.alphaMask
405 && (x || y) 412 && (x || y)
406 && repeat == RepeatNone; 413 && repeat == RepeatNone;
407 414
408 rxvt_img *img = new rxvt_img (s, alpha ? XRenderFindStandardFormat (dpy, PictStandardARGB32) : format, 0, 0, w, h, repeat); 415 rxvt_img *img = new rxvt_img (s, alpha ? find_alpha_format_for (dpy, format) : format, 0, 0, w, h, repeat);
409 img->alloc (); 416 img->alloc ();
410 417
411 Picture src = src_picture (); 418 Picture src = src_picture ();
412 Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0); 419 Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
413 420

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