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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 | |
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 | long nby; | |
82 | char *pbits; | |
83 | ChangeGCVal gcval[3]; | |
84 | unsigned char char2b[2]; | |
85 | ||
86 | /* turn glyph index into a protocol-format char2b */ | |
87 | char2b[0] = (unsigned char) (ch >> 8); | |
88 | char2b[1] = (unsigned char) (ch & 0xff); | |
89 | ||
90 | pScreen = screenInfo.screens[0]; | |
91 | nby = BitmapBytePad(cm->width) * (long) cm->height; | |
92 | pbits = calloc(1, nby); | |
93 | if (!pbits) | |
94 | return BadAlloc; | |
95 | ||
96 | ppix = (PixmapPtr) (*pScreen->CreatePixmap) (pScreen, cm->width, | |
97 | cm->height, 1, | |
98 | CREATE_PIXMAP_USAGE_SCRATCH); | |
99 | pGC = GetScratchGC(1, pScreen); | |
100 | if (!ppix || !pGC) { | |
101 | if (ppix) | |
102 | (*pScreen->DestroyPixmap) (ppix); | |
103 | if (pGC) | |
104 | FreeScratchGC(pGC); | |
105 | free(pbits); | |
106 | return BadAlloc; | |
107 | } | |
108 | ||
109 | rect.x = 0; | |
110 | rect.y = 0; | |
111 | rect.width = cm->width; | |
112 | rect.height = cm->height; | |
113 | ||
114 | /* fill the pixmap with 0 */ | |
115 | gcval[0].val = GXcopy; | |
116 | gcval[1].val = 0; | |
117 | gcval[2].ptr = (pointer) pfont; | |
118 | ChangeGC(NullClient, pGC, GCFunction | GCForeground | GCFont, gcval); | |
119 | ValidateGC((DrawablePtr) ppix, pGC); | |
120 | (*pGC->ops->PolyFillRect) ((DrawablePtr) ppix, pGC, 1, &rect); | |
121 | ||
122 | /* draw the glyph */ | |
123 | gcval[0].val = 1; | |
124 | ChangeGC(NullClient, pGC, GCForeground, gcval); | |
125 | ValidateGC((DrawablePtr) ppix, pGC); | |
126 | (*pGC->ops->PolyText16) ((DrawablePtr) ppix, pGC, cm->xhot, cm->yhot, | |
127 | 1, (unsigned short *) char2b); | |
128 | (*pScreen->GetImage) ((DrawablePtr) ppix, 0, 0, cm->width, cm->height, | |
129 | XYPixmap, 1, pbits); | |
130 | *ppbits = (unsigned char *) pbits; | |
131 | FreeScratchGC(pGC); | |
132 | (*pScreen->DestroyPixmap) (ppix); | |
133 | return Success; | |
134 | } | |
135 | ||
136 | Bool | |
137 | CursorMetricsFromGlyph(FontPtr pfont, unsigned ch, CursorMetricPtr cm) | |
138 | { | |
139 | CharInfoPtr pci; | |
140 | unsigned long nglyphs; | |
141 | CARD8 chs[2]; | |
142 | FontEncoding encoding; | |
143 | ||
144 | chs[0] = ch >> 8; | |
145 | chs[1] = ch; | |
146 | encoding = (FONTLASTROW(pfont) == 0) ? Linear16Bit : TwoD16Bit; | |
147 | if (encoding == Linear16Bit) { | |
148 | if (ch < pfont->info.firstCol || pfont->info.lastCol < ch) | |
149 | return FALSE; | |
150 | } | |
151 | else { | |
152 | if (chs[0] < pfont->info.firstRow || pfont->info.lastRow < chs[0]) | |
153 | return FALSE; | |
154 | if (chs[1] < pfont->info.firstCol || pfont->info.lastCol < chs[1]) | |
155 | return FALSE; | |
156 | } | |
157 | (*pfont->get_glyphs) (pfont, 1, chs, encoding, &nglyphs, &pci); | |
158 | if (nglyphs == 0) | |
159 | return FALSE; | |
160 | cm->width = pci->metrics.rightSideBearing - pci->metrics.leftSideBearing; | |
161 | cm->height = pci->metrics.descent + pci->metrics.ascent; | |
162 | if (pci->metrics.leftSideBearing > 0) { | |
163 | cm->width += pci->metrics.leftSideBearing; | |
164 | cm->xhot = 0; | |
165 | } | |
166 | else { | |
167 | cm->xhot = -pci->metrics.leftSideBearing; | |
168 | if (pci->metrics.rightSideBearing < 0) | |
169 | cm->width -= pci->metrics.rightSideBearing; | |
170 | } | |
171 | if (pci->metrics.ascent < 0) { | |
172 | cm->height -= pci->metrics.ascent; | |
173 | cm->yhot = 0; | |
174 | } | |
175 | else { | |
176 | cm->yhot = pci->metrics.ascent; | |
177 | if (pci->metrics.descent < 0) | |
178 | cm->height -= pci->metrics.descent; | |
179 | } | |
180 | return TRUE; | |
181 | } |