1 /************************************************************************
2
3 Copyright 1987, 1998 The Open Group
4
5 Permission to use, copy, modify, distribute, and sell this software and its
6 documentation for any purpose is hereby granted without fee, provided that
7 the above copyright notice appear in all copies and that both that
8 copyright notice and this permission notice appear in supporting
9 documentation.
10
11 The above copyright notice and this permission notice shall be included in
12 all copies or substantial portions of the Software.
13
14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21 Except as contained in this notice, the name of The Open Group shall not be
22 used in advertising or otherwise to promote the sale, use or other dealings
23 in this Software without prior written authorization from The Open Group.
24
25 Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
26
27 All Rights Reserved
28
29 Permission to use, copy, modify, and distribute this software and its
30 documentation for any purpose and without fee is hereby granted,
31 provided that the above copyright notice appear in all copies and that
32 both that copyright notice and this permission notice appear in
33 supporting documentation, and that the name of Digital not be
34 used in advertising or publicity pertaining to distribution of the
35 software without specific, written prior permission.
36
37 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
38 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
39 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
40 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
41 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
42 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
43 SOFTWARE.
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
64 dealing with padding and such-like, we draw the glyph into
65 a bitmap, then read the bits out with GetImage, which
66 uses server-natural format.
67 since all screens return the same bitmap format, we'll just use
68 the first one we find.
69 the character origin lines up with the hotspot in the
70 cursor metrics.
71 */
72
73 int
ServerBitsFromGlyph(FontPtr pfont,unsigned ch,CursorMetricPtr cm,unsigned char ** ppbits)74 ServerBitsFromGlyph(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
134 Bool
CursorMetricsFromGlyph(FontPtr pfont,unsigned ch,CursorMetricPtr cm)135 CursorMetricsFromGlyph(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