xserver

xserver with xephyr scale patch
git clone https://git.neptards.moe/u3shit/xserver.git
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glyphcurs.c (6301B)

      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     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
    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 }