1/************************************************************************
2
3Copyright 1987, 1998  The Open Group
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7the above copyright notice appear in all copies and that both that
8copyright notice and this permission notice appear in supporting
9documentation.
10
11The above copyright notice and this permission notice shall be included in
12all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
17OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21Except as contained in this notice, the name of The Open Group shall not be
22used in advertising or otherwise to promote the sale, use or other dealings
23in this Software without prior written authorization from The Open Group.
24
25Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
26
27                        All Rights Reserved
28
29Permission to use, copy, modify, and distribute this software and its
30documentation for any purpose and without fee is hereby granted,
31provided that the above copyright notice appear in all copies and that
32both that copyright notice and this permission notice appear in
33supporting documentation, and that the name of Digital not be
34used in advertising or publicity pertaining to distribution of the
35software without specific, written prior permission.
36
37DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
38ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
39DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
40ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
41WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
42ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
43SOFTWARE.
44
45************************************************************************/
46
47#ifdef HAVE_DIX_CONFIG_H
48#include <dix-config.h>
49#endif
50
51#include "misc.h"
52#include <X11/fonts/fontstruct.h>
53#include "dixfontstr.h"
54#include "scrnintstr.h"
55#include "gcstruct.h"
56#include "resource.h"
57#include "dix.h"
58#include "cursorstr.h"
59#include "opaque.h"
60#include "servermd.h"
61
62/*
63    get the bits out of the font in a portable way.  to avoid
64dealing with padding and such-like, we draw the glyph into
65a bitmap, then read the bits out with GetImage, which
66uses server-natural format.
67    since all screens return the same bitmap format, we'll just use
68the first one we find.
69    the character origin lines up with the hotspot in the
70cursor metrics.
71*/
72
73int
74ServerBitsFromGlyph(FontPtr pfont, unsigned ch, CursorMetricPtr cm,
75                    unsigned char **ppbits)
76{
77    ScreenPtr pScreen;
78    GCPtr pGC;
79    xRectangle rect;
80    PixmapPtr ppix;
81    char *pbits;
82    ChangeGCVal gcval[3];
83    unsigned char char2b[2];
84
85    /* turn glyph index into a protocol-format char2b */
86    char2b[0] = (unsigned char) (ch >> 8);
87    char2b[1] = (unsigned char) (ch & 0xff);
88
89    pScreen = screenInfo.screens[0];
90    pbits = calloc(BitmapBytePad(cm->width), cm->height);
91    if (!pbits)
92        return BadAlloc;
93
94    ppix = (PixmapPtr) (*pScreen->CreatePixmap) (pScreen, cm->width,
95                                                 cm->height, 1,
96                                                 CREATE_PIXMAP_USAGE_SCRATCH);
97    pGC = GetScratchGC(1, pScreen);
98    if (!ppix || !pGC) {
99        if (ppix)
100            (*pScreen->DestroyPixmap) (ppix);
101        if (pGC)
102            FreeScratchGC(pGC);
103        free(pbits);
104        return BadAlloc;
105    }
106
107    rect.x = 0;
108    rect.y = 0;
109    rect.width = cm->width;
110    rect.height = cm->height;
111
112    /* fill the pixmap with 0 */
113    gcval[0].val = GXcopy;
114    gcval[1].val = 0;
115    gcval[2].ptr = (void *) pfont;
116    ChangeGC(NullClient, pGC, GCFunction | GCForeground | GCFont, gcval);
117    ValidateGC((DrawablePtr) ppix, pGC);
118    (*pGC->ops->PolyFillRect) ((DrawablePtr) ppix, pGC, 1, &rect);
119
120    /* draw the glyph */
121    gcval[0].val = 1;
122    ChangeGC(NullClient, pGC, GCForeground, gcval);
123    ValidateGC((DrawablePtr) ppix, pGC);
124    (*pGC->ops->PolyText16) ((DrawablePtr) ppix, pGC, cm->xhot, cm->yhot,
125                             1, (unsigned short *) char2b);
126    (*pScreen->GetImage) ((DrawablePtr) ppix, 0, 0, cm->width, cm->height,
127                          XYPixmap, 1, pbits);
128    *ppbits = (unsigned char *) pbits;
129    FreeScratchGC(pGC);
130    (*pScreen->DestroyPixmap) (ppix);
131    return Success;
132}
133
134Bool
135CursorMetricsFromGlyph(FontPtr pfont, unsigned ch, CursorMetricPtr cm)
136{
137    CharInfoPtr pci;
138    unsigned long nglyphs;
139    CARD8 chs[2];
140    FontEncoding encoding;
141
142    chs[0] = ch >> 8;
143    chs[1] = ch;
144    encoding = (FONTLASTROW(pfont) == 0) ? Linear16Bit : TwoD16Bit;
145    if (encoding == Linear16Bit) {
146        if (ch < pfont->info.firstCol || pfont->info.lastCol < ch)
147            return FALSE;
148    }
149    else {
150        if (chs[0] < pfont->info.firstRow || pfont->info.lastRow < chs[0])
151            return FALSE;
152        if (chs[1] < pfont->info.firstCol || pfont->info.lastCol < chs[1])
153            return FALSE;
154    }
155    (*pfont->get_glyphs) (pfont, 1, chs, encoding, &nglyphs, &pci);
156    if (nglyphs == 0)
157        return FALSE;
158    cm->width = pci->metrics.rightSideBearing - pci->metrics.leftSideBearing;
159    cm->height = pci->metrics.descent + pci->metrics.ascent;
160    if (pci->metrics.leftSideBearing > 0) {
161        cm->width += pci->metrics.leftSideBearing;
162        cm->xhot = 0;
163    }
164    else {
165        cm->xhot = -pci->metrics.leftSideBearing;
166        if (pci->metrics.rightSideBearing < 0)
167            cm->width -= pci->metrics.rightSideBearing;
168    }
169    if (pci->metrics.ascent < 0) {
170        cm->height -= pci->metrics.ascent;
171        cm->yhot = 0;
172    }
173    else {
174        cm->yhot = pci->metrics.ascent;
175        if (pci->metrics.descent < 0)
176            cm->height -= pci->metrics.descent;
177    }
178    return TRUE;
179}
180