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Diffstat (limited to 'xorg-server/dix/glyphcurs.c')
| -rw-r--r-- | xorg-server/dix/glyphcurs.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/xorg-server/dix/glyphcurs.c b/xorg-server/dix/glyphcurs.c new file mode 100644 index 000000000..905b5fb13 --- /dev/null +++ b/xorg-server/dix/glyphcurs.c @@ -0,0 +1,194 @@ +/************************************************************************ + +Copyright 1987, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + + +Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts. + + All Rights Reserved + +Permission to use, copy, modify, and distribute this software and its +documentation for any purpose and without fee is hereby granted, +provided that the above copyright notice appear in all copies and that +both that copyright notice and this permission notice appear in +supporting documentation, and that the name of Digital not be +used in advertising or publicity pertaining to distribution of the +software without specific, written prior permission. + +DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING +ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL +DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR +ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, +WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, +ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS +SOFTWARE. + +************************************************************************/ + + +#ifdef HAVE_DIX_CONFIG_H +#include <dix-config.h> +#endif + +#include "misc.h" +#include <X11/fonts/fontstruct.h> +#include "dixfontstr.h" +#include "scrnintstr.h" +#include "gcstruct.h" +#include "resource.h" +#include "dix.h" +#include "cursorstr.h" +#include "opaque.h" +#include "servermd.h" + + +/* + get the bits out of the font in a portable way. to avoid +dealing with padding and such-like, we draw the glyph into +a bitmap, then read the bits out with GetImage, which +uses server-natural format. + since all screens return the same bitmap format, we'll just use +the first one we find. + the character origin lines up with the hotspot in the +cursor metrics. +*/ + +int +ServerBitsFromGlyph(FontPtr pfont, unsigned ch, CursorMetricPtr cm, unsigned char **ppbits) +{ + ScreenPtr pScreen; + GCPtr pGC; + xRectangle rect; + PixmapPtr ppix; + long nby; + char *pbits; + ChangeGCVal gcval[3]; + unsigned char char2b[2]; + + /* turn glyph index into a protocol-format char2b */ + char2b[0] = (unsigned char)(ch >> 8); + char2b[1] = (unsigned char)(ch & 0xff); + + pScreen = screenInfo.screens[0]; + nby = BitmapBytePad(cm->width) * (long)cm->height; + pbits = (char *)xalloc(nby); + if (!pbits) + return BadAlloc; + /* zeroing the (pad) bits seems to help some ddx cursor handling */ + bzero(pbits, nby); + + ppix = (PixmapPtr)(*pScreen->CreatePixmap)(pScreen, cm->width, + cm->height, 1, + CREATE_PIXMAP_USAGE_SCRATCH); + pGC = GetScratchGC(1, pScreen); + if (!ppix || !pGC) + { + if (ppix) + (*pScreen->DestroyPixmap)(ppix); + if (pGC) + FreeScratchGC(pGC); + xfree(pbits); + return BadAlloc; + } + + rect.x = 0; + rect.y = 0; + rect.width = cm->width; + rect.height = cm->height; + + /* fill the pixmap with 0 */ + gcval[0].val = GXcopy; + gcval[1].val = 0; + gcval[2].ptr = (pointer)pfont; + dixChangeGC(NullClient, pGC, GCFunction | GCForeground | GCFont, + NULL, gcval); + ValidateGC((DrawablePtr)ppix, pGC); + (*pGC->ops->PolyFillRect)((DrawablePtr)ppix, pGC, 1, &rect); + + /* draw the glyph */ + gcval[0].val = 1; + dixChangeGC(NullClient, pGC, GCForeground, NULL, gcval); + ValidateGC((DrawablePtr)ppix, pGC); + (*pGC->ops->PolyText16)((DrawablePtr)ppix, pGC, cm->xhot, cm->yhot, + 1, (unsigned short *)char2b); + (*pScreen->GetImage)((DrawablePtr)ppix, 0, 0, cm->width, cm->height, + XYPixmap, 1, pbits); + *ppbits = (unsigned char *)pbits; + FreeScratchGC(pGC); + (*pScreen->DestroyPixmap)(ppix); + return Success; +} + + +Bool +CursorMetricsFromGlyph(FontPtr pfont, unsigned ch, CursorMetricPtr cm) +{ + CharInfoPtr pci; + unsigned long nglyphs; + CARD8 chs[2]; + FontEncoding encoding; + + chs[0] = ch >> 8; + chs[1] = ch; + encoding = (FONTLASTROW(pfont) == 0) ? Linear16Bit : TwoD16Bit; + if (encoding == Linear16Bit) + { + if (ch < pfont->info.firstCol || pfont->info.lastCol < ch) + return FALSE; + } + else + { + if (chs[0] < pfont->info.firstRow || pfont->info.lastRow < chs[0]) + return FALSE; + if (chs[1] < pfont->info.firstCol || pfont->info.lastCol < chs[1]) + return FALSE; + } + (*pfont->get_glyphs) (pfont, 1, chs, encoding, &nglyphs, &pci); + if (nglyphs == 0) + return FALSE; + cm->width = pci->metrics.rightSideBearing - pci->metrics.leftSideBearing; + cm->height = pci->metrics.descent + pci->metrics.ascent; + if (pci->metrics.leftSideBearing > 0) + { + cm->width += pci->metrics.leftSideBearing; + cm->xhot = 0; + } + else + { + cm->xhot = -pci->metrics.leftSideBearing; + if (pci->metrics.rightSideBearing < 0) + cm->width -= pci->metrics.rightSideBearing; + } + if (pci->metrics.ascent < 0) + { + cm->height -= pci->metrics.ascent; + cm->yhot = 0; + } + else + { + cm->yhot = pci->metrics.ascent; + if (pci->metrics.descent < 0) + cm->height -= pci->metrics.descent; + } + return TRUE; +} |