1 /*
2
3 Copyright 1993 by Davor Matic
4
5 Permission to use, copy, modify, distribute, and sell this software
6 and its documentation for any purpose is hereby granted without fee,
7 provided that the above copyright notice appear in all copies and that
8 both that copyright notice and this permission notice appear in
9 supporting documentation. Davor Matic makes no representations about
10 the suitability of this software for any purpose. It is provided "as
11 is" without express or implied warranty.
12
13 */
14
15 #ifdef HAVE_XNEST_CONFIG_H
16 #include <xnest-config.h>
17 #endif
18
19 #include <X11/X.h>
20 #include <X11/Xproto.h>
21 #include "regionstr.h"
22 #include "pixmapstr.h"
23 #include "scrnintstr.h"
24 #include "gc.h"
25 #include "servermd.h"
26 #include "privates.h"
27 #include "mi.h"
28
29 #include "Xnest.h"
30
31 #include "Display.h"
32 #include "Screen.h"
33 #include "XNPixmap.h"
34
35 DevPrivateKeyRec xnestPixmapPrivateKeyRec;
36
37 PixmapPtr
xnestCreatePixmap(ScreenPtr pScreen,int width,int height,int depth,unsigned usage_hint)38 xnestCreatePixmap(ScreenPtr pScreen, int width, int height, int depth,
39 unsigned usage_hint)
40 {
41 PixmapPtr pPixmap;
42
43 pPixmap = AllocatePixmap(pScreen, 0);
44 if (!pPixmap)
45 return NullPixmap;
46 pPixmap->drawable.type = DRAWABLE_PIXMAP;
47 pPixmap->drawable.class = 0;
48 pPixmap->drawable.depth = depth;
49 pPixmap->drawable.bitsPerPixel = depth;
50 pPixmap->drawable.id = 0;
51 pPixmap->drawable.x = 0;
52 pPixmap->drawable.y = 0;
53 pPixmap->drawable.width = width;
54 pPixmap->drawable.height = height;
55 pPixmap->drawable.pScreen = pScreen;
56 pPixmap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
57 pPixmap->refcnt = 1;
58 pPixmap->devKind = PixmapBytePad(width, depth);
59 pPixmap->usage_hint = usage_hint;
60 if (width && height)
61 xnestPixmapPriv(pPixmap)->pixmap =
62 XCreatePixmap(xnestDisplay,
63 xnestDefaultWindows[pScreen->myNum],
64 width, height, depth);
65 else
66 xnestPixmapPriv(pPixmap)->pixmap = 0;
67
68 return pPixmap;
69 }
70
71 Bool
xnestDestroyPixmap(PixmapPtr pPixmap)72 xnestDestroyPixmap(PixmapPtr pPixmap)
73 {
74 if (--pPixmap->refcnt)
75 return TRUE;
76 XFreePixmap(xnestDisplay, xnestPixmap(pPixmap));
77 FreePixmap(pPixmap);
78 return TRUE;
79 }
80
81 Bool
xnestModifyPixmapHeader(PixmapPtr pPixmap,int width,int height,int depth,int bitsPerPixel,int devKind,void * pPixData)82 xnestModifyPixmapHeader(PixmapPtr pPixmap, int width, int height, int depth,
83 int bitsPerPixel, int devKind, void *pPixData)
84 {
85 if(!xnestPixmapPriv(pPixmap)->pixmap && width > 0 && height > 0) {
86 xnestPixmapPriv(pPixmap)->pixmap =
87 XCreatePixmap(xnestDisplay,
88 xnestDefaultWindows[pPixmap->drawable.pScreen->myNum],
89 width, height, depth);
90 }
91
92 return miModifyPixmapHeader(pPixmap, width, height, depth,
93 bitsPerPixel, devKind, pPixData);
94 }
95
96 RegionPtr
xnestPixmapToRegion(PixmapPtr pPixmap)97 xnestPixmapToRegion(PixmapPtr pPixmap)
98 {
99 XImage *ximage;
100 register RegionPtr pReg, pTmpReg;
101 register int x, y;
102 unsigned long previousPixel, currentPixel;
103 BoxRec Box = { 0, 0, 0, 0 };
104 Bool overlap;
105
106 ximage = XGetImage(xnestDisplay, xnestPixmap(pPixmap), 0, 0,
107 pPixmap->drawable.width, pPixmap->drawable.height,
108 1, XYPixmap);
109
110 pReg = RegionCreate(NULL, 1);
111 pTmpReg = RegionCreate(NULL, 1);
112 if (!pReg || !pTmpReg) {
113 XDestroyImage(ximage);
114 return NullRegion;
115 }
116
117 for (y = 0; y < pPixmap->drawable.height; y++) {
118 Box.y1 = y;
119 Box.y2 = y + 1;
120 previousPixel = 0L;
121 for (x = 0; x < pPixmap->drawable.width; x++) {
122 currentPixel = XGetPixel(ximage, x, y);
123 if (previousPixel != currentPixel) {
124 if (previousPixel == 0L) {
125 /* left edge */
126 Box.x1 = x;
127 }
128 else if (currentPixel == 0L) {
129 /* right edge */
130 Box.x2 = x;
131 RegionReset(pTmpReg, &Box);
132 RegionAppend(pReg, pTmpReg);
133 }
134 previousPixel = currentPixel;
135 }
136 }
137 if (previousPixel != 0L) {
138 /* right edge because of the end of pixmap */
139 Box.x2 = pPixmap->drawable.width;
140 RegionReset(pTmpReg, &Box);
141 RegionAppend(pReg, pTmpReg);
142 }
143 }
144
145 RegionDestroy(pTmpReg);
146 XDestroyImage(ximage);
147
148 RegionValidate(pReg, &overlap);
149
150 return pReg;
151 }
152