| 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 | } |