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1.1 root 1: /***********************************************************
2: Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
3: and the Massachusetts Institute of Technology, Cambridge, Massachusetts.
4:
5: All Rights Reserved
6:
7: Permission to use, copy, modify, and distribute this software and its
8: documentation for any purpose and without fee is hereby granted,
9: provided that the above copyright notice appear in all copies and that
10: both that copyright notice and this permission notice appear in
11: supporting documentation, and that the names of Digital or MIT not be
12: used in advertising or publicity pertaining to distribution of the
13: software without specific, written prior permission.
14:
15: DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
16: ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
17: DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
18: ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
19: WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
20: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
21: SOFTWARE.
22:
23: ******************************************************************/
24: /* $Header: mfbtile.c,v 1.5 87/09/11 07:48:49 toddb Exp $ */
25: #include "X.h"
26:
27: #include "windowstr.h"
28: #include "regionstr.h"
29: #include "pixmapstr.h"
30: #include "scrnintstr.h"
31:
32: #include "mfb.h"
33: #include "maskbits.h"
34:
35: /*
36: this code could be called by the paint window background stuff,
37: too; there would be some speed hit because of the different
38: parameters and the need to check for a rop when filling
39: with a tile.
40:
41: the boxes are already translated.
42:
43: NOTE:
44: iy = ++iy < tileHeight ? iy : 0
45: is equivalent to iy%= tileheight, and saves a division.
46: */
47:
48: /*
49: tile area with a 32 bit wide pixmap
50: */
51: void
52: mfbTileArea32(pDraw, nbox, pbox, alu, ptile)
53: DrawablePtr pDraw;
54: int nbox;
55: BoxPtr pbox;
56: int alu;
57: PixmapPtr ptile;
58: {
59: register unsigned int *psrc;
60: /* pointer to bits in tile, if needed */
61: int tileHeight; /* height of the tile */
62: register unsigned int srcpix;
63:
64: int nlwidth; /* width in longwords of the drawable */
65: int w; /* width of current box */
66: register int h; /* height of current box */
67: int startmask;
68: int endmask; /* masks for reggedy bits at either end of line */
69: int nlwMiddle; /* number of longwords between sides of boxes */
70: register int nlwExtra;
71: /* to get from right of box to left of next span */
72:
73: register int nlw; /* loop version of nlwMiddle */
74: register unsigned int *p; /* pointer to bits we're writing */
75: int iy; /* index of current scanline in tile */
76:
77:
78: unsigned int *pbits; /* pointer to start of drawable */
79:
80: if (pDraw->type == DRAWABLE_WINDOW)
81: {
82: pbits = (unsigned int *)
83: (((PixmapPtr)(pDraw->pScreen->devPrivate))->devPrivate);
84: nlwidth = (int)
85: (((PixmapPtr)(pDraw->pScreen->devPrivate))->devKind) >> 2;
86: }
87: else
88: {
89: pbits = (unsigned int *)(((PixmapPtr)pDraw)->devPrivate);
90: nlwidth = (int)(((PixmapPtr)pDraw)->devKind) >> 2;
91: }
92:
93: tileHeight = ptile->height;
94: psrc = (unsigned int *)(ptile->devPrivate);
95:
96: while (nbox--)
97: {
98: w = pbox->x2 - pbox->x1;
99: h = pbox->y2 - pbox->y1;
100: iy = pbox->y1 % tileHeight;
101: p = pbits + (pbox->y1 * nlwidth) + (pbox->x1 >> 5);
102:
103: if ( ((pbox->x1 & 0x1f) + w) < 32)
104: {
105: maskpartialbits(pbox->x1, w, startmask);
106: nlwExtra = nlwidth;
107: while (h--)
108: {
109: srcpix = psrc[iy];
110: iy = ++iy < tileHeight ? iy : 0;
111: *p = (*p & ~startmask) |
112: (DoRop(alu, srcpix, *p) & startmask);
113: p += nlwExtra;
114: }
115: }
116: else
117: {
118: maskbits(pbox->x1, w, startmask, endmask, nlwMiddle);
119: nlwExtra = nlwidth - nlwMiddle;
120:
121: if (startmask && endmask)
122: {
123: nlwExtra -= 1;
124: while (h--)
125: {
126: srcpix = psrc[iy];
127: iy = ++iy < tileHeight ? iy : 0;
128: nlw = nlwMiddle;
129: *p = (*p & ~startmask) |
130: (DoRop(alu, srcpix, *p) & startmask);
131: p++;
132: while (nlw--)
133: {
134: *p = DoRop(alu, srcpix, *p);
135: p++;
136: }
137: *p = (*p & ~endmask) |
138: (DoRop(alu, srcpix, *p) & endmask);
139: p += nlwExtra;
140: }
141: }
142: else if (startmask && !endmask)
143: {
144: nlwExtra -= 1;
145: while (h--)
146: {
147: srcpix = psrc[iy];
148: iy = ++iy < tileHeight ? iy : 0;
149: nlw = nlwMiddle;
150: *p = (*p & ~startmask) |
151: (DoRop(alu, srcpix, *p) & startmask);
152: p++;
153: while (nlw--)
154: {
155: *p = DoRop(alu, srcpix, *p);
156: p++;
157: }
158: p += nlwExtra;
159: }
160: }
161: else if (!startmask && endmask)
162: {
163: while (h--)
164: {
165: srcpix = psrc[iy];
166: iy = ++iy < tileHeight ? iy : 0;
167: nlw = nlwMiddle;
168: while (nlw--)
169: {
170: *p = DoRop(alu, srcpix, *p);
171: p++;
172: }
173: *p = (*p & ~endmask) |
174: (DoRop(alu, srcpix, *p) & endmask);
175: p += nlwExtra;
176: }
177: }
178: else /* no ragged bits at either end */
179: {
180: while (h--)
181: {
182: srcpix = psrc[iy];
183: iy = ++iy < tileHeight ? iy : 0;
184: nlw = nlwMiddle;
185: while (nlw--)
186: {
187: *p = DoRop(alu, srcpix, *p);
188: p++;
189: }
190: p += nlwExtra;
191: }
192: }
193: }
194: pbox++;
195: }
196: }
197:
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