1/***********************************************************
2
3Copyright 1987, 1998  The Open Group
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7the above copyright notice appear in all copies and that both that
8copyright notice and this permission notice appear in supporting
9documentation.
10
11The above copyright notice and this permission notice shall be included in
12all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
17OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21Except as contained in this notice, the name of The Open Group shall not be
22used in advertising or otherwise to promote the sale, use or other dealings
23in this Software without prior written authorization from The Open Group.
24
25Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
26
27                        All Rights Reserved
28
29Permission to use, copy, modify, and distribute this software and its
30documentation for any purpose and without fee is hereby granted,
31provided that the above copyright notice appear in all copies and that
32both that copyright notice and this permission notice appear in
33supporting documentation, and that the name of Digital not be
34used in advertising or publicity pertaining to distribution of the
35software without specific, written prior permission.
36
37DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
38ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
39DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
40ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
41WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
42ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
43SOFTWARE.
44
45******************************************************************/
46
47#ifdef HAVE_DIX_CONFIG_H
48#include <dix-config.h>
49#endif
50
51#include	<X11/X.h>
52#include	<X11/Xmd.h>
53#include	<X11/Xproto.h>
54#include	"misc.h"
55#include	<X11/fonts/fontstruct.h>
56#include        <X11/fonts/libxfont2.h>
57#include	"dixfontstr.h"
58#include	"gcstruct.h"
59#include	"windowstr.h"
60#include	"scrnintstr.h"
61#include	"pixmap.h"
62#include	"servermd.h"
63#include        "mi.h"
64
65/*
66    machine-independent glyph blt.
67    assumes that glyph bits in snf are written in bytes,
68have same bit order as the server's bitmap format,
69and are byte padded.  this corresponds to the snf distributed
70with the sample server.
71
72    get a scratch GC.
73    in the scratch GC set alu = GXcopy, fg = 1, bg = 0
74    allocate a bitmap big enough to hold the largest glyph in the font
75    validate the scratch gc with the bitmap
76    for each glyph
77	carefully put the bits of the glyph in a buffer,
78	    padded to the server pixmap scanline padding rules
79	fake a call to PutImage from the buffer into the bitmap
80	use the bitmap in a call to PushPixels
81*/
82
83void
84miPolyGlyphBlt(DrawablePtr pDrawable, GC * pGC, int x, int y, unsigned int nglyph, CharInfoPtr * ppci,  /* array of character info */
85               void *pglyphBase       /* start of array of glyphs */
86    )
87{
88    int width, height;
89    PixmapPtr pPixmap;
90    int nbyLine;                /* bytes per line of padded pixmap */
91    FontPtr pfont;
92    GCPtr pGCtmp;
93    int i;
94    int j;
95    unsigned char *pbits;       /* buffer for PutImage */
96    unsigned char *pb;          /* temp pointer into buffer */
97    CharInfoPtr pci;            /* current char info */
98    unsigned char *pglyph;      /* pointer bits in glyph */
99    int gWidth, gHeight;        /* width and height of glyph */
100    int nbyGlyphWidth;          /* bytes per scanline of glyph */
101    int nbyPadGlyph;            /* server padded line of glyph */
102
103    ChangeGCVal gcvals[3];
104
105    if (pGC->miTranslate) {
106        x += pDrawable->x;
107        y += pDrawable->y;
108    }
109
110    pfont = pGC->font;
111    width = FONTMAXBOUNDS(pfont, rightSideBearing) -
112        FONTMINBOUNDS(pfont, leftSideBearing);
113    height = FONTMAXBOUNDS(pfont, ascent) + FONTMAXBOUNDS(pfont, descent);
114
115    pPixmap = (*pDrawable->pScreen->CreatePixmap) (pDrawable->pScreen,
116                                                   width, height, 1,
117                                                   CREATE_PIXMAP_USAGE_SCRATCH);
118    if (!pPixmap)
119        return;
120
121    pGCtmp = GetScratchGC(1, pDrawable->pScreen);
122    if (!pGCtmp) {
123        (*pDrawable->pScreen->DestroyPixmap) (pPixmap);
124        return;
125    }
126
127    gcvals[0].val = GXcopy;
128    gcvals[1].val = 1;
129    gcvals[2].val = 0;
130
131    ChangeGC(NullClient, pGCtmp, GCFunction | GCForeground | GCBackground,
132             gcvals);
133
134    nbyLine = BitmapBytePad(width);
135    pbits = xallocarray(height, nbyLine);
136    if (!pbits) {
137        (*pDrawable->pScreen->DestroyPixmap) (pPixmap);
138        FreeScratchGC(pGCtmp);
139        return;
140    }
141    while (nglyph--) {
142        pci = *ppci++;
143        pglyph = FONTGLYPHBITS(pglyphBase, pci);
144        gWidth = GLYPHWIDTHPIXELS(pci);
145        gHeight = GLYPHHEIGHTPIXELS(pci);
146        if (gWidth && gHeight) {
147            nbyGlyphWidth = GLYPHWIDTHBYTESPADDED(pci);
148            nbyPadGlyph = BitmapBytePad(gWidth);
149
150            if (nbyGlyphWidth == nbyPadGlyph
151#if GLYPHPADBYTES != 4
152                && (((int) pglyph) & 3) == 0
153#endif
154                ) {
155                pb = pglyph;
156            }
157            else {
158                for (i = 0, pb = pbits; i < gHeight;
159                     i++, pb = pbits + (i * nbyPadGlyph))
160                    for (j = 0; j < nbyGlyphWidth; j++)
161                        *pb++ = *pglyph++;
162                pb = pbits;
163            }
164
165            if ((pGCtmp->serialNumber) != (pPixmap->drawable.serialNumber))
166                ValidateGC((DrawablePtr) pPixmap, pGCtmp);
167            (*pGCtmp->ops->PutImage) ((DrawablePtr) pPixmap, pGCtmp,
168                                      pPixmap->drawable.depth,
169                                      0, 0, gWidth, gHeight,
170                                      0, XYBitmap, (char *) pb);
171
172            (*pGC->ops->PushPixels) (pGC, pPixmap, pDrawable,
173                                     gWidth, gHeight,
174                                     x + pci->metrics.leftSideBearing,
175                                     y - pci->metrics.ascent);
176        }
177        x += pci->metrics.characterWidth;
178    }
179    (*pDrawable->pScreen->DestroyPixmap) (pPixmap);
180    free(pbits);
181    FreeScratchGC(pGCtmp);
182}
183
184void
185miImageGlyphBlt(DrawablePtr pDrawable, GC * pGC, int x, int y, unsigned int nglyph, CharInfoPtr * ppci, /* array of character info */
186                void *pglyphBase      /* start of array of glyphs */
187    )
188{
189    ExtentInfoRec info;         /* used by xfont2_query_glyph_extents() */
190    ChangeGCVal gcvals[3];
191    int oldAlu, oldFS;
192    unsigned long oldFG;
193    xRectangle backrect;
194
195    xfont2_query_glyph_extents(pGC->font, ppci, (unsigned long) nglyph, &info);
196
197    if (info.overallWidth >= 0) {
198        backrect.x = x;
199        backrect.width = info.overallWidth;
200    }
201    else {
202        backrect.x = x + info.overallWidth;
203        backrect.width = -info.overallWidth;
204    }
205    backrect.y = y - FONTASCENT(pGC->font);
206    backrect.height = FONTASCENT(pGC->font) + FONTDESCENT(pGC->font);
207
208    oldAlu = pGC->alu;
209    oldFG = pGC->fgPixel;
210    oldFS = pGC->fillStyle;
211
212    /* fill in the background */
213    gcvals[0].val = GXcopy;
214    gcvals[1].val = pGC->bgPixel;
215    gcvals[2].val = FillSolid;
216    ChangeGC(NullClient, pGC, GCFunction | GCForeground | GCFillStyle, gcvals);
217    ValidateGC(pDrawable, pGC);
218    (*pGC->ops->PolyFillRect) (pDrawable, pGC, 1, &backrect);
219
220    /* put down the glyphs */
221    gcvals[0].val = oldFG;
222    ChangeGC(NullClient, pGC, GCForeground, gcvals);
223    ValidateGC(pDrawable, pGC);
224    (*pGC->ops->PolyGlyphBlt) (pDrawable, pGC, x, y, nglyph, ppci, pglyphBase);
225
226    /* put all the toys away when done playing */
227    gcvals[0].val = oldAlu;
228    gcvals[1].val = oldFG;
229    gcvals[2].val = oldFS;
230    ChangeGC(NullClient, pGC, GCFunction | GCForeground | GCFillStyle, gcvals);
231    ValidateGC(pDrawable, pGC);
232
233}
234