summaryrefslogtreecommitdiff
path: root/hw/xnest/Pixmap.c
blob: b82dfa49be5f725cbbe49211437e7ab6b75e8cb2 (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
/* $Xorg: Pixmap.c,v 1.3 2000/08/17 19:53:28 cpqbld Exp $ */
/*

Copyright 1993 by Davor Matic

Permission to use, copy, modify, distribute, and sell this software
and its documentation for any purpose is hereby granted without fee,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation.  Davor Matic makes no representations about
the suitability of this software for any purpose.  It is provided "as
is" without express or implied warranty.

*/
/* $XFree86: xc/programs/Xserver/hw/xnest/Pixmap.c,v 3.8 2003/11/16 05:05:20 dawes Exp $ */

#include "X.h"
#include "Xproto.h"
#include "regionstr.h"
#include "pixmapstr.h"
#include "scrnintstr.h"
#include "regionstr.h"
#include "gc.h"
#include "servermd.h"
#include "mi.h"

#include "Xnest.h"

#include "Display.h"
#include "Screen.h"
#include "XNPixmap.h"

#ifdef PIXPRIV
int xnestPixmapPrivateIndex;	    
#endif

PixmapPtr
xnestCreatePixmap(ScreenPtr pScreen, int width, int height, int depth)
{
  PixmapPtr pPixmap;

  pPixmap = AllocatePixmap(pScreen, sizeof(xnestPrivPixmap));
  if (!pPixmap)
    return NullPixmap;
  pPixmap->drawable.type = DRAWABLE_PIXMAP;
  pPixmap->drawable.class = 0;
  pPixmap->drawable.depth = depth;
  pPixmap->drawable.bitsPerPixel = depth;
  pPixmap->drawable.id = 0;
  pPixmap->drawable.x = 0;
  pPixmap->drawable.y = 0;
  pPixmap->drawable.width = width;
  pPixmap->drawable.height = height;
  pPixmap->drawable.pScreen = pScreen;
  pPixmap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
  pPixmap->refcnt = 1;
  pPixmap->devKind = PixmapBytePad(width, depth);
#ifdef PIXPRIV
  pPixmap->devPrivates[xnestPixmapPrivateIndex].ptr =
      (pointer)((char *)pPixmap + pScreen->totalPixmapSize);
#else
  pPixmap->devPrivate.ptr = (pointer)(pPixmap + 1);
#endif
  if (width && height)
      xnestPixmapPriv(pPixmap)->pixmap = 
	  XCreatePixmap(xnestDisplay, 
			xnestDefaultWindows[pScreen->myNum],
			width, height, depth);
  else
      xnestPixmapPriv(pPixmap)->pixmap = 0;
  
  return pPixmap;
}

Bool
xnestDestroyPixmap(PixmapPtr pPixmap)
{
  if(--pPixmap->refcnt)
    return TRUE;
  XFreePixmap(xnestDisplay, xnestPixmap(pPixmap));
  xfree(pPixmap);
  return TRUE;
}

RegionPtr
xnestPixmapToRegion(PixmapPtr pPixmap)
{
  XImage *ximage;
  register RegionPtr pReg, pTmpReg;
  register int x, y;
  unsigned long previousPixel, currentPixel;
  BoxRec Box;
  Bool overlap;
  
  ximage = XGetImage(xnestDisplay, xnestPixmap(pPixmap), 0, 0,
		     pPixmap->drawable.width, pPixmap->drawable.height,
		     1, XYPixmap);
  
  pReg = REGION_CREATE(pPixmap->drawable.pScreen, NULL, 1);
  pTmpReg = REGION_CREATE(pPixmap->drawable.pScreen, NULL, 1);
  if(!pReg || !pTmpReg) return NullRegion;
  
  for (y = 0; y < pPixmap->drawable.height; y++) {
    Box.y1 = y;
    Box.y2 = y + 1;
    previousPixel = 0L;
    for (x = 0; x < pPixmap->drawable.width; x++) {
      currentPixel = XGetPixel(ximage, x, y);
      if (previousPixel != currentPixel) {
	if (previousPixel == 0L) { 
	  /* left edge */
	  Box.x1 = x;
	}
	else if (currentPixel == 0L) {
	  /* right edge */
	  Box.x2 = x;
	  REGION_RESET(pPixmap->drawable.pScreen, pTmpReg, &Box);
	  REGION_APPEND(pPixmap->drawable.pScreen, pReg, pTmpReg);
	}
	previousPixel = currentPixel;
      }
    }
    if (previousPixel != 0L) {
      /* right edge because of the end of pixmap */
      Box.x2 = pPixmap->drawable.width;
      REGION_RESET(pPixmap->drawable.pScreen, pTmpReg, &Box);
      REGION_APPEND(pPixmap->drawable.pScreen, pReg, pTmpReg);
    }
  }
  
  REGION_DESTROY(pPixmap->drawable.pScreen, pTmpReg);
  XDestroyImage(ximage);

  REGION_VALIDATE(pPixmap->drawable.pScreen, pReg, &overlap);

  return(pReg);
}