summaryrefslogtreecommitdiff
path: root/src/neg.c
blob: 31f4fad2c7b66b07d8d1644785bb04787ef66e5b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
/*
 * Copyright (c) 2006 Darryll Truchan <moppsy@comcast.net>
 *
 * Pixel shader negating by Dennis Kasprzyk <onestone@beryl-project.org>
 * Usage of matches by Danny Baumann <maniac@beryl-project.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 */

#include <stdlib.h>
#include <string.h>
#include <stdio.h>

#include <X11/Xatom.h>
#include <X11/extensions/Xrender.h>

#include <compiz.h>
#include "neg_options.h"

static int displayPrivateIndex;

typedef struct _NEGDisplay
{
	HandleEventProc handleEvent;
	int screenPrivateIndex;
} NEGDisplay;


typedef struct _NEGSCreen
{
	int windowPrivateIndex;

	DrawWindowTextureProc drawWindowTexture;
	DamageWindowRectProc damageWindowRect;
	Bool isNeg;					/* negative screen flag */
	int negFunction;
	int negAlphaFunction;
} NEGScreen;

typedef struct _NEGWindow
{
	Bool isNeg;					/* negative window flag */
	Bool createEvent;
} NEGWindow;

#define GET_NEG_DISPLAY(d) ((NEGDisplay *) (d)->privates[displayPrivateIndex].ptr)
#define NEG_DISPLAY(d) NEGDisplay *nd = GET_NEG_DISPLAY (d)
#define GET_NEG_SCREEN(s, nd) ((NEGScreen *) (s)->privates[(nd)->screenPrivateIndex].ptr)
#define NEG_SCREEN(s) NEGScreen *ns = GET_NEG_SCREEN (s, GET_NEG_DISPLAY (s->display))
#define GET_NEG_WINDOW(w, ns) ((NEGWindow *) (w)->privates[(ns)->windowPrivateIndex].ptr)
#define NEG_WINDOW(w) NEGWindow *nw = GET_NEG_WINDOW  (w, GET_NEG_SCREEN  (w->screen, GET_NEG_DISPLAY (w->screen->display)))

#define NUM_OPTIONS(s) (sizeof ((s)->opt) / sizeof (CompOption))

static void NEGToggle(CompWindow * w)
{
	NEG_WINDOW(w);

	/* toggle window negative flag */
	nw->isNeg = !nw->isNeg;

	/* check exclude list */
	if (matchEval(negGetExcludeMatch(w->screen), w))
	    nw->isNeg = FALSE;

	/* cause repainting */
	addWindowDamage(w);
}

static void NEGToggleScreen(CompScreen * s)
{
	CompWindow *w;

	NEG_SCREEN(s);

	/* toggle screen negative flag */
	ns->isNeg = !ns->isNeg;

	/* toggle every window */
	for (w = s->windows; w; w = w->next)
		if (w)
			NEGToggle(w);
}

static Bool
negToggle(CompDisplay * d, CompAction * action, CompActionState state,
		  CompOption * option, int nOption)
{
	CompWindow *w;
	Window xid;

	xid = getIntOptionNamed(option, nOption, "window", 0);

	w = findWindowAtDisplay(d, xid);

	if (w)
		NEGToggle(w);

	return TRUE;
}

static Bool
negToggleAll(CompDisplay * d, CompAction * action, CompActionState state,
			 CompOption * option, int nOption)
{
	CompScreen *s;
	Window xid;

	xid = getIntOptionNamed(option, nOption, "root", 0);

	s = findScreenAtDisplay(d, xid);

	if (s)
		NEGToggleScreen(s);

	return TRUE;
}


static int
getNegFragmentFunction (CompScreen  *s, CompTexture *texture, Bool alpha)
{
    CompFunctionData *data;

    NEG_SCREEN (s);

	int target;

	if (texture->target == GL_TEXTURE_2D)
		target = COMP_FETCH_TARGET_2D;
    else
		target = COMP_FETCH_TARGET_RECT;

	if (alpha)
	{
		if (ns->negAlphaFunction)
			return ns->negAlphaFunction;
	}
	else
	{
		if (ns->negFunction)
			return ns->negFunction;
	}


    data = createFunctionData ();
    if (data)
    {
		Bool ok = TRUE;
		int	 handle = 0;

		if (alpha)
		{
			ok &= addTempHeaderOpToFunctionData (data, "neg" );
		}

		ok &= addFetchOpToFunctionData (data, "output", NULL, target);
 		if (alpha)
 		{
 			ok &= addDataOpToFunctionData (data, "RCP neg.a, output.a;");
 			ok &= addDataOpToFunctionData (data, "MUL output.rgb, neg.a, output;");
 		}
		ok &= addDataOpToFunctionData (data, "SUB output.rgb, 1.0, output;");
 		if (alpha)
 		{
 			ok &= addDataOpToFunctionData (data, "MUL output.rgb, output.a, output;");
 		}
		ok &= addColorOpToFunctionData (data, "output", "output");

		if (!ok)
		{
			destroyFunctionData (data);
			return 0;
		}

		handle = createFragmentFunction (s, "neg", data);

		if (alpha)
			ns->negAlphaFunction = handle;
		else
			ns->negFunction = handle;

		destroyFunctionData (data);

		return handle;
    }

    return 0;
}

static void
NEGDrawWindowTexture(CompWindow * w,
					 CompTexture * texture,
					 const FragmentAttrib *attrib,
					 unsigned int mask)
{
	int filter;

	NEG_SCREEN(w->screen);
	NEG_WINDOW(w);

	/* only negate window contents; that's the only case
	   where w->texture->name == texture->name */
	if (nw->isNeg && (texture->name == w->texture->name))
	{
		if (w->screen->fragmentProgram)
		{
			FragmentAttrib fa = *attrib;
			int function;
			function = getNegFragmentFunction (w->screen, texture, w->alpha);
	    	if (function)
	    	{
				addFragmentFunction (&fa, function);
			}
			UNWRAP(ns, w->screen, drawWindowTexture);
			(*w->screen->drawWindowTexture) (w, texture, &fa, mask);
			WRAP(ns, w->screen, drawWindowTexture, NEGDrawWindowTexture);
		}
		else
		{
			/* this is for the most part taken from paint.c */

			if (mask & PAINT_WINDOW_TRANSFORMED_MASK)
			{
					filter = w->screen->filter[WINDOW_TRANS_FILTER];
			}
			else if (mask & PAINT_WINDOW_ON_TRANSFORMED_SCREEN_MASK)
			{
					filter = w->screen->filter[SCREEN_TRANS_FILTER];
			}
			else
			{
					filter = w->screen->filter[NOTHING_TRANS_FILTER];
			}


			/* if we can addjust saturation, even if it's just on and off */
			if (w->screen->canDoSaturated && attrib->saturation != COLOR)
			{
				GLfloat constant[4];

				/* if the paint mask has this set we want to blend */
				if (mask & PAINT_WINDOW_TRANSLUCENT_MASK)
					glEnable(GL_BLEND);

				/* enable the texture */
				enableTexture(w->screen, texture, filter);

				/* texture combiner */
				glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);

				glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_INTERPOLATE);
				glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE);
				glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_PRIMARY_COLOR);
				glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE2_RGB, GL_PRIMARY_COLOR);
				glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_ONE_MINUS_SRC_COLOR);	/* negate */
				glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);
				glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND2_RGB, GL_SRC_ALPHA);

				glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE);
				glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_TEXTURE);
				glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);

				glColor4f(1.0f, 1.0f, 1.0f, 0.5f);

				/* make another texture active */
				w->screen->activeTexture(GL_TEXTURE1_ARB);

				/* enable that texture */
				enableTexture(w->screen, texture, filter);

				glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);

				glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_DOT3_RGB);
				glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_PREVIOUS);
				glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_CONSTANT);
				glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
				glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);

				/* if we can do saturation that is in between min and max */
				if (w->screen->canDoSlightlySaturated && attrib->saturation > 0)
				{
					glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE);
					glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_PREVIOUS);
					glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);

					constant[0] = 0.5f + 0.5f * RED_SATURATION_WEIGHT;
					constant[1] = 0.5f + 0.5f * GREEN_SATURATION_WEIGHT;
					constant[2] = 0.5f + 0.5f * BLUE_SATURATION_WEIGHT;
					constant[3] = 1.0;

					glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, constant);

					/* mack another texture active */
					w->screen->activeTexture(GL_TEXTURE2_ARB);

					/* enable that texture */
					enableTexture(w->screen, texture, filter);

					glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);

					glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_INTERPOLATE);
					glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE0);
					glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_PREVIOUS);
					glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE2_RGB, GL_CONSTANT);
					glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_ONE_MINUS_SRC_COLOR);	/* negate */
					glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);
					glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND2_RGB, GL_SRC_ALPHA);

					glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE);
					glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_PREVIOUS);
					glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);

					/* color constant */
					constant[3] = attrib->saturation / 65535.0f;

					glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, constant);

					/* if we are not opaque or not fully bright */
					if (attrib->opacity < OPAQUE || attrib->brightness != BRIGHT)
					{
						/* activate a new texture */
						w->screen->activeTexture(GL_TEXTURE3_ARB);

						/* enable that texture */
						enableTexture(w->screen, texture, filter);

						/* color constant */
						constant[3] = attrib->opacity / 65535.0f;
						constant[0] = constant[1] =
								constant[2] =
								constant[3] * attrib->brightness / 65535.0f;

						glTexEnvfv(GL_TEXTURE_ENV,
								GL_TEXTURE_ENV_COLOR, constant);

						glTexEnvf(GL_TEXTURE_ENV,
								GL_TEXTURE_ENV_MODE, GL_COMBINE);

						glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_MODULATE);
						glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_PREVIOUS);
						glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_CONSTANT);
						glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
						glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);

						glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_MODULATE);
						glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_PREVIOUS);
						glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA, GL_CONSTANT);
						glTexEnvf(GL_TEXTURE_ENV,
								GL_OPERAND0_ALPHA, GL_SRC_ALPHA);
						glTexEnvf(GL_TEXTURE_ENV,
								GL_OPERAND1_ALPHA, GL_SRC_ALPHA);

						/* draw the window geometry */
						(*w->drawWindowGeometry) (w);

						/* disable the current texture */
						disableTexture(w->screen, texture);

						/* set texture mode back to replace */
						glTexEnvi(GL_TEXTURE_ENV,
								GL_TEXTURE_ENV_MODE, GL_REPLACE);

						/* re-activate last texture */
						w->screen->activeTexture(GL_TEXTURE2_ARB);
					}
					else
					{
						/* fully opaque and bright */

						/* draw the window geometry */
						(*w->drawWindowGeometry) (w);
					}

					/* disable the current texture */
					disableTexture(w->screen, texture);

					/* set the texture mode back to replace */
					glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);

					/* re-activate last texture */
					w->screen->activeTexture(GL_TEXTURE1_ARB);
				}
				else
				{
					/* fully saturated or fully unsaturated */

					glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_MODULATE);
					glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_PREVIOUS);
					glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA, GL_CONSTANT);
					glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);
					glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA);

					/* color constant */
					constant[3] = attrib->opacity / 65535.0f;
					constant[0] = constant[1] = constant[2] =
							constant[3] * attrib->brightness / 65535.0f;

					constant[0] =
							0.5f + 0.5f * RED_SATURATION_WEIGHT * constant[0];
					constant[1] =
							0.5f + 0.5f * GREEN_SATURATION_WEIGHT * constant[1];
					constant[2] =
							0.5f + 0.5f * BLUE_SATURATION_WEIGHT * constant[2];

					glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, constant);

					/* draw the window geometry */
					(*w->drawWindowGeometry) (w);
				}

				/* disable the current texture */
				disableTexture(w->screen, texture);

				/* set the texture mode back to replace */
				glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);

				/* re-activate last texture */
				w->screen->activeTexture(GL_TEXTURE0_ARB);

				/* disable that texture */
				disableTexture(w->screen, texture);

				/* set the default color */
				glColor4usv(defaultColor);

				/* set screens texture mode back to replace */
				screenTexEnvMode(w->screen, GL_REPLACE);

				/* if it's a translucent window, disable blending */
				if (mask & PAINT_WINDOW_TRANSLUCENT_MASK)
					glDisable(GL_BLEND);
			}
			else
			{
				/* no saturation adjustments */

				/* enable the current texture */
				enableTexture(w->screen, texture, filter);

				glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
				glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_REPLACE);
				glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE);
				glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_ONE_MINUS_SRC_COLOR);	/* negate */


				/* we are not opaque or fully bright */
				if ((mask & PAINT_WINDOW_TRANSLUCENT_MASK)
					|| attrib->brightness != BRIGHT)
				{
					GLfloat constant[4];

					/* enable blending */
					glEnable(GL_BLEND);

					/* color constant */
					constant[3] = attrib->opacity / 65535.0f;
					constant[0] = constant[3] * attrib->brightness / 65535.0f;
					constant[1] = constant[3] * attrib->brightness / 65535.0f;
					constant[2] = constant[3] * attrib->brightness / 65535.0f;
					glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, constant);

					glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
					glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_MODULATE);
					glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE);
					glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_CONSTANT);
					glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_ONE_MINUS_SRC_COLOR);	/* negate */
					glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);

					glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
					glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_MODULATE);
					glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_TEXTURE);
					glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA, GL_CONSTANT);
					glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);
					glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA);

					/* draw the window geometry */
					(*w->drawWindowGeometry) (w);

					/* disable blending */
					glDisable(GL_BLEND);

				}
				else
				{
					/* no adjustments to saturation, brightness or opacity */

					/* draw the window geometry */
					(*w->drawWindowGeometry) (w);
				}

				/* disable the current texture */
				disableTexture(w->screen, texture);

				/* set the screens texture mode back to replace */
				screenTexEnvMode(w->screen, GL_REPLACE);
			}
		}
	}
	else
	{
		/* not negative */
		UNWRAP(ns, w->screen, drawWindowTexture);
		(*w->screen->drawWindowTexture) (w, texture, attrib, mask);
		WRAP(ns, w->screen, drawWindowTexture, NEGDrawWindowTexture);
	}
}
static Bool NEGDamageWindowRect(CompWindow * w, Bool initial, BoxPtr rect)
{
	int status;

	NEG_SCREEN(w->screen);
	NEG_WINDOW(w);

	/* the window is initial when it is being mapped */
	if (initial)
	{
		/* if the screen is negative, negate the new window */
		if (ns->isNeg && !nw->isNeg)
			NEGToggle(w);
	}

	UNWRAP(ns, w->screen, damageWindowRect);
	status = (*w->screen->damageWindowRect) (w, initial, rect);
	WRAP(ns, w->screen, damageWindowRect, NEGDamageWindowRect);

	return status;
}

static void
NEGHandleEvent (CompDisplay *d,
		XEvent      *event)
{
	CompWindow *w;

	NEG_DISPLAY (d);
	/* Only apply at window creation.
	 * Using CreateNotify not working.
	 */
	if (event->type == MapNotify)
	{
		w = findWindowAtDisplay (d, event->xmap.window);
		if (w)
		{
			NEG_WINDOW (w);
			if (nw->createEvent)
			{
				if (w && matchEval(negGetNegMatch(w->screen), w))
					NEGToggle (w);
				nw->createEvent = FALSE;
			}	
		}
	}
	
	UNWRAP (nd, d, handleEvent);
	(*d->handleEvent) (d, event);
	WRAP (nd, d, handleEvent, NEGHandleEvent);
}

static void NEGScreenOptionChanged(CompScreen *s, CompOption *opt, NegScreenOptions num)
{
	switch (num)
	{
	    case NegScreenOptionNegMatch:
		{
			CompWindow *w;
 			for (w = s->windows; w; w = w->next)
	    		{
				NEG_WINDOW (w);
				if (matchEval(negGetNegMatch(s), w) && !nw->isNeg)
					NEGToggle (w);
				else if (! matchEval(negGetNegMatch(s), w) && nw->isNeg)
					NEGToggle (w);
	    		}
		}
		break;
		
	    default:
		break;
		
	}
}

static Bool NEGInitDisplay(CompPlugin * p, CompDisplay * d)
{
	NEGDisplay *nd;

	nd = malloc(sizeof(NEGDisplay));
	if (!nd)
		return FALSE;

	nd->screenPrivateIndex = allocateScreenPrivateIndex(d);
	if (nd->screenPrivateIndex < 0)
	{
		free(nd);
		return FALSE;
	}

	negSetWindowToggleInitiate(d, negToggle);
	negSetScreenToggleInitiate(d, negToggleAll);

	WRAP (nd, d, handleEvent, NEGHandleEvent);
	d->privates[displayPrivateIndex].ptr = nd;

	return TRUE;
}

static void NEGFiniDisplay(CompPlugin * p, CompDisplay * d)
{
	NEG_DISPLAY(d);
	freeScreenPrivateIndex(d, nd->screenPrivateIndex);
	UNWRAP (nd, d, handleEvent);
	free(nd);
}

static Bool NEGInitScreen(CompPlugin * p, CompScreen * s)
{
	NEGScreen *ns;

	NEG_DISPLAY(s->display);

	ns = malloc(sizeof(NEGScreen));
	if (!ns)
		return FALSE;

	ns->windowPrivateIndex = allocateWindowPrivateIndex(s);
	if (ns->windowPrivateIndex < 0)
	{
		free(ns);
		return FALSE;
	}

	/* initialize the screen variables
	 * you know what happens if you don't
	 */
	ns->isNeg = FALSE;
	
	negSetNegMatchNotify (s, NEGScreenOptionChanged);
	
	/* wrap overloaded functions */
	WRAP(ns, s, drawWindowTexture, NEGDrawWindowTexture);
	WRAP(ns, s, damageWindowRect, NEGDamageWindowRect);

	s->privates[nd->screenPrivateIndex].ptr = ns;

	ns->negFunction = 0;
	ns->negAlphaFunction = 0;

	return TRUE;
}


static void NEGFiniScreen(CompPlugin * p, CompScreen * s)
{
	NEG_SCREEN(s);

	freeWindowPrivateIndex(s, ns->windowPrivateIndex);
	UNWRAP(ns, s, drawWindowTexture);
	UNWRAP(ns, s, damageWindowRect);

	if (ns->negFunction)
		destroyFragmentFunction (s, ns->negFunction);
	if (ns->negAlphaFunction)
		destroyFragmentFunction (s, ns->negAlphaFunction);

	free(ns);
}

static Bool NEGInitWindow(CompPlugin * p, CompWindow * w)
{
	NEGWindow *nw;

	NEG_SCREEN(w->screen);

	nw = malloc(sizeof(NEGWindow));
	if (!nw)
		return FALSE;

	nw->isNeg = FALSE;
	nw->createEvent = TRUE;
	
	w->privates[ns->windowPrivateIndex].ptr = nw;
	
	return TRUE;
}

static void NEGFiniWindow(CompPlugin * p, CompWindow * w)
{
	NEG_WINDOW(w);
	free(nw);
}

static Bool NEGInit(CompPlugin * p)
{
	displayPrivateIndex = allocateDisplayPrivateIndex();
	if (displayPrivateIndex < 0)
		return FALSE;

	return TRUE;
}

static void NEGFini(CompPlugin * p)
{
	if (displayPrivateIndex >= 0)
		freeDisplayPrivateIndex(displayPrivateIndex);
}

static int NEGGetVersion(CompPlugin * p, int version)
{
	return ABIVERSION;
}

CompPluginVTable NEGVTable = {
	"neg",
	N_("Negative"),
	N_("Used to set a window or the screen negative"),
	NEGGetVersion,
	0,
	NEGInit,
	NEGFini,
	NEGInitDisplay,
	NEGFiniDisplay,
	NEGInitScreen,
	NEGFiniScreen,
	NEGInitWindow,
	NEGFiniWindow,
	NULL,
	NULL,
	NULL,
	NULL,
	NULL,
	0,
	0,
	0
};

CompPluginVTable *getCompPluginInfo(void)
{
	return &NEGVTable;
}