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Annotation of 43BSD/contrib/X/libsun/bitpix.c, revision 1.1

1.1     ! root        1: #ifndef lint
        !             2: static char *rcsid_bitpix_c = "$Header: bitpix.c,v 10.2 86/02/01 16:20:31 tony Rel $";
        !             3: #endif lint
        !             4: #ifdef sun
        !             5: /*
        !             6:  * The Sun X drivers are a product of Sun Microsystems, Inc. and are provided
        !             7:  * for unrestricted use provided that this legend is included on all tape
        !             8:  * media and as a part of the software program in whole or part.  Users
        !             9:  * may copy or modify these drivers without charge, but are not authorized
        !            10:  * to license or distribute them to anyone else except as part of a product or
        !            11:  * program developed by the user.
        !            12:  * 
        !            13:  * THE SUN X DRIVERS ARE PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND
        !            14:  * INCLUDING THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A
        !            15:  * PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE
        !            16:  * PRACTICE.
        !            17:  *
        !            18:  * The Sun X Drivers are provided with no support and without any obligation
        !            19:  * on the part of Sun Microsystems, Inc. to assist in their use, correction,
        !            20:  * modification or enhancement.
        !            21:  * 
        !            22:  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
        !            23:  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THE SUN X
        !            24:  * DRIVERS OR ANY PART THEREOF.
        !            25:  * 
        !            26:  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
        !            27:  * or profits or other special, indirect and consequential damages, even if
        !            28:  * Sun has been advised of the possibility of such damages.
        !            29:  * 
        !            30:  * Sun Microsystems, Inc.
        !            31:  * 2550 Garcia Avenue
        !            32:  * Mountain View, California  94043
        !            33:  */
        !            34: 
        !            35: #ifndef        lint
        !            36: static char sccsid[] = "@(#)bitpix.c 2.1 86/01/28 Copyright 1986 Sun Micro";
        !            37: #endif
        !            38: 
        !            39: /*-
        !            40:  * Copyright (c) 1986 by Sun Microsystems,  Inc.
        !            41:  */
        !            42: /* Copyright 1985 Massachusetts Institute of Technology */
        !            43: 
        !            44: /* Routines to cache bitmaps and pixmaps in the frame buffer memory:
        !            45:  *
        !            46:  *     StoreBitmap     Creates a bitmap
        !            47:  *     FreeBitmap      Frees the storage taken by a bitmap
        !            48:  *     CharBitmap      Creates a bitmap from a font character
        !            49:  *     StorePixmap     Creates a pixmap
        !            50:  *     FreePixmap      Frees the storage taken by a pixmap
        !            51:  *     MakePixmap      Create a pixmap from a bitmap
        !            52:  *     PixmapSave      Save a region of the screen
        !            53:  *     PixmapGet       Read a region of the screen
        !            54:  *
        !            55:  */
        !            56: 
        !            57: #include "Xsun.h"
        !            58: #include <errno.h>
        !            59: 
        !            60: extern int errno;
        !            61: extern struct pixrect *PixRect;
        !            62: 
        !            63: char *Xalloc();
        !            64: PIXMAP *MakePixmap();
        !            65: 
        !            66: BITMAP *StoreBitmap (width, height, data)
        !            67:        int width, height;
        !            68:        char *data;
        !            69: {
        !            70:        register BITMAP *bm;
        !            71:        int size;
        !            72: 
        !            73:        bm = (BITMAP *) Xalloc (sizeof (BITMAP));
        !            74:        bm->width = width;
        !            75:        bm->height = height;
        !            76:        bm->refcnt = 1;
        !            77: 
        !            78:        size = BitmapSize(width, height);
        !            79:        if ((bm->data = (caddr_t) malloc (size)) == NULL) {
        !            80:            free ((caddr_t) bm);
        !            81:            return (NULL);
        !            82:        }
        !            83:        bcopy (data, bm->data, size);
        !            84:        InvertPixelOrder((short *) bm->data, size>>1);
        !            85: 
        !            86:        return (bm);
        !            87: }
        !            88: 
        !            89: FreeBitmap (bitmap)
        !            90:        register BITMAP *bitmap;
        !            91: {
        !            92:        free ((caddr_t) bitmap->data);
        !            93:        free ((caddr_t) bitmap);
        !            94: }
        !            95: 
        !            96: BITMAP *CharBitmap (c, font)
        !            97:        unsigned c;
        !            98:        register FONT *font;
        !            99: {
        !           100:        int width;
        !           101:        register BITMAP *bm;
        !           102: 
        !           103:        if (c < font->first || c > font->last) {
        !           104:            errno = EINVAL;
        !           105:            return (NULL);
        !           106:        }
        !           107:        if (font->fixed)
        !           108:            width = font->avg_width;
        !           109:        else
        !           110:            width = ((struct pixfont *)font->data)->pf_char[c].pc_adv.x;
        !           111:        if (width == 0) {
        !           112:            errno = EINVAL;
        !           113:            return (NULL);
        !           114:        }
        !           115:        bm = (BITMAP *) Xalloc (sizeof (BITMAP));
        !           116:        bm->width = width;
        !           117:        bm->height = font->height;
        !           118:        bm->refcnt = 1;
        !           119:        if ((bm->data = 
        !           120:            (caddr_t) malloc (BitmapSize(width, bm->height))) == NULL) {
        !           121:            free ((caddr_t) bm);
        !           122:            errno = ENOMEM;
        !           123:            return (NULL);
        !           124:        }
        !           125: 
        !           126:        CopyText ((caddr_t) &c, 1, font, bm);
        !           127:        return (bm);
        !           128: }
        !           129: 
        !           130: /*ARGSUSED*/
        !           131: PIXMAP *StorePixmap (width, height, format, data)
        !           132:        int width, height, format;
        !           133:        char *data;
        !           134: {
        !           135:     register PIXMAP *pm;
        !           136: 
        !           137:     if (PixRect->pr_depth == 1) {
        !           138:        register BITMAP *bm;
        !           139: 
        !           140:        bm = (BITMAP *) StoreBitmap(width, height, data);
        !           141:        if (bm == NULL)
        !           142:            return (NULL);
        !           143:        bm->refcnt = 0;
        !           144:        if ((pm = MakePixmap(bm, 1, 0)) == NULL) {
        !           145:            FreeBitmap(bm);
        !           146:            return (NULL);
        !           147:        }
        !           148:     }
        !           149:     else if (PixRect->pr_depth <= 8) {
        !           150:        char *     newdata;
        !           151:        int         size;
        !           152: 
        !           153:        pm = (PIXMAP *) Xalloc(sizeof(PIXMAP));
        !           154:        pm->width = width;
        !           155:        pm->height = height;
        !           156:        pm->refcnt = 1;
        !           157:        switch (format) {
        !           158:        case XYFormat:
        !           159:            size = XYPixmapSize(width, height, PixRect->pr_depth);
        !           160:            pm->kind = XYColorPixmap;
        !           161:            break;
        !           162:        case ZFormat:
        !           163:            size = BZPixmapSize(width, height);
        !           164:            if (width&1)
        !           165:                size += height;
        !           166:            pm->kind = ZColorPixmap;
        !           167:            break;
        !           168:        }
        !           169:        newdata = (char *) Xalloc(size);
        !           170:        if (width&1) {
        !           171:            register int i;
        !           172:            register char * old = data, *new = newdata;
        !           173: 
        !           174:            for (i = 0; i < height; i++) { 
        !           175:                bcopy(old, new, width);
        !           176:                old += width;
        !           177:                new += width + 1;
        !           178:            }
        !           179:        } else
        !           180:            bcopy(data, newdata, size);
        !           181:        pm->data = newdata;
        !           182:     }
        !           183:     return (pm);
        !           184: }
        !           185: 
        !           186: FreePixmap (pixmap)
        !           187:        register PIXMAP *pixmap;
        !           188: {
        !           189:     switch (pixmap->kind) {
        !           190:     case BitmapPixmap:
        !           191:        {
        !           192:            register BITMAP *bm;
        !           193: 
        !           194:            bm = PDATA(pixmap);
        !           195:            if (--bm->refcnt == 0)
        !           196:                FreeBitmap(bm);
        !           197:        }
        !           198:        break;
        !           199:     case ZColorPixmap:
        !           200:     case XYColorPixmap:
        !           201:        free((caddr_t)pixmap->data);
        !           202:        break;
        !           203:     case ConstantPixmap:
        !           204:        return;
        !           205:     }
        !           206:     free((caddr_t) pixmap);
        !           207: }
        !           208: 
        !           209: PIXMAP constpix0 = {1, 1, 1, 1, ConstantPixmap, (caddr_t) 0};
        !           210: PIXMAP constpix1 = {1, 1, 1, 1, ConstantPixmap, (caddr_t) 1};
        !           211: 
        !           212: PIXMAP *MakePixmap (xymask, fore, back)
        !           213:        register BITMAP *xymask;
        !           214:        int fore, back;
        !           215: {
        !           216:     register PIXMAP *pm = NULL;
        !           217: 
        !           218:     if (xymask == NULL) {
        !           219:        if (PixRect->pr_depth == 1) {
        !           220:            if (fore & 1)
        !           221:                pm = &constpix1;
        !           222:            else
        !           223:                pm = &constpix0;
        !           224:            pm->refcnt++;
        !           225:        }
        !           226:        else if (PixRect->pr_depth <= 8) {
        !           227:            static PIXMAP *constpm[256];
        !           228: 
        !           229:            if (constpm[fore & 0xFF] == 0) {
        !           230:                constpm[fore & 0xFF] = pm = (PIXMAP *) Xalloc(sizeof(PIXMAP));
        !           231:                pm->width = 1;
        !           232:                pm->height = 1;
        !           233:                pm->refcnt = 1;
        !           234:                pm->tile = CanBeTiled;
        !           235:                pm->kind = ConstantPixmap;
        !           236:                pm->data = (caddr_t) fore;
        !           237:            }
        !           238:            else {
        !           239:                pm = constpm[fore & 0xFF];
        !           240:                pm->refcnt++;
        !           241:            }
        !           242:        }
        !           243:        return (pm);
        !           244:     }
        !           245: 
        !           246:     pm = (PIXMAP *) Xalloc(sizeof(PIXMAP));
        !           247:     pm->width = xymask->width;
        !           248:     pm->height = xymask->height;
        !           249:     pm->refcnt = 1;
        !           250:     xymask->refcnt++;
        !           251:     pm->kind = BitmapPixmap;
        !           252:     pm->data = (caddr_t) xymask;
        !           253:     pm->tile = CanBeTiled;
        !           254:     /* save a bit to indicate if we have to invert the source */
        !           255: 
        !           256:     if ((PixRect->pr_depth == 1) && (back & 1))
        !           257:        pm->kind |= InvertFlag;
        !           258:     return (pm);
        !           259: }
        !           260: 
        !           261: PIXMAP *PixmapSave (srcx, srcy, width, height)
        !           262:        int srcx, srcy, width, height;
        !           263: {
        !           264:     PIXMAP     *pm = NULL;
        !           265: 
        !           266: 
        !           267:     if (PixRect->pr_depth == 1) {
        !           268:        register BITMAP *bm;
        !           269: 
        !           270:        bm = (BITMAP *) Xalloc(sizeof(BITMAP));
        !           271:        bm->width = width;
        !           272:        bm->height = height;
        !           273:        bm->refcnt = 0;
        !           274: 
        !           275:        if ((bm->data =
        !           276:             (caddr_t) malloc(BitmapSize(width, height))) == NULL) {
        !           277:            free((caddr_t) bm);
        !           278:            return (NULL);
        !           279:        }
        !           280:        {
        !           281:            struct pixrect *dest;
        !           282: 
        !           283:            dest = mem_point(width, height, 1, bm->data);
        !           284:            CheckCursor(srcx, srcy, width, height);
        !           285:            pr_rop(dest, 0, 0, width, height, PIX_SRC | PIX_DONTCLIP, PixRect, srcx, srcy);
        !           286:            pr_destroy(dest);
        !           287:            RestoreCursor();
        !           288:        }
        !           289:        if ((pm = MakePixmap(bm, 1, 0)) == 0) {
        !           290:            FreeBitmap(bm);
        !           291:            return (NULL);
        !           292:        }
        !           293:     }
        !           294:     else if (PixRect->pr_depth <= 8) {
        !           295:        int sz = BZPixmapSize(width, height);
        !           296: 
        !           297:        if (width&1)
        !           298:            sz += height;
        !           299:        pm = (PIXMAP *) Xalloc(sizeof(PIXMAP));
        !           300:        pm->width = width;
        !           301:        pm->height = height;
        !           302:        pm->refcnt = 1;
        !           303:        pm->kind = ZColorPixmap;
        !           304:        if ((pm->data =
        !           305:             (caddr_t) malloc(sz)) == NULL) {
        !           306:            free((caddr_t) pm);
        !           307:            return (NULL);
        !           308:        }
        !           309:        {
        !           310:            struct pixrect *dest;
        !           311: 
        !           312:            dest = mem_point(width, height, PixRect->pr_depth, pm->data);
        !           313:            CheckCursor(srcx, srcy, width, height);
        !           314:            pr_rop(dest, 0, 0, width, height, PIX_SRC | PIX_DONTCLIP, PixRect, srcx, srcy);
        !           315:            pr_destroy(dest);
        !           316:            RestoreCursor();
        !           317:        }
        !           318:     }
        !           319:     return (pm);
        !           320: }
        !           321: 
        !           322: /*ARGSUSED*/
        !           323: PixmapGet (srcx, srcy, width, height, client, format, swapit)
        !           324:        int srcx, srcy, width, height, client, format;
        !           325: {
        !           326:     PIXMAP     *pm;
        !           327:     BITMAP     *bm;
        !           328:     pm = PixmapSave(srcx, srcy, width, height);
        !           329:     switch (pm->kind) {
        !           330:     case BitmapPixmap:{
        !           331:            int         size = BitmapSize(width, height);
        !           332: 
        !           333:            bm = (BITMAP *) pm->data;
        !           334:            if (swapit)
        !           335:                Swap_shorts((short *) bm->data, size >> 1);
        !           336:            InvertPixelOrder((short *) bm->data, size >> 1);
        !           337:            Write(client, bm->data, size);
        !           338:            /* Pad amount written to 32-bit boundary - Ahem! */
        !           339:            if (size%4) {
        !           340:                Write(client, bm->data, 4 - (size%4));
        !           341:            }
        !           342:        }
        !           343:        break;
        !           344:     case ZColorPixmap:{
        !           345:            switch (format) {
        !           346:            case XYFormat:{
        !           347:                    caddr_t     newdata;
        !           348:                    int size;
        !           349: 
        !           350:                    size = XYPixmapSize(width, height, PixRect->pr_depth);
        !           351:                    newdata = (caddr_t) malloc(size);
        !           352:                    if (newdata) {
        !           353:                        ZtoXY(width, height, PixRect->pr_depth, pm->data, newdata);
        !           354:                        free(pm->data);
        !           355:                        pm->data = newdata;
        !           356:                        if (swapit)
        !           357:                            Swap_shorts((short *) pm->data, size >> 1);
        !           358:                        InvertPixelOrder((short *) pm->data, size >> 1);
        !           359:                    }
        !           360:                    Write(client, pm->data, size);
        !           361:                    /* Pad amount written to 32-bit boundary - Ahem! */
        !           362:                    if (size%4) {
        !           363:                        Write(client, pm->data, 4 - (size%4));
        !           364:                    }
        !           365:                }
        !           366:                break;
        !           367:            case ZFormat: {
        !           368:                int size = BZPixmapSize(width, height);
        !           369: 
        !           370:                if (width&1) {
        !           371:                    register int i;
        !           372:                    register char *old = pm->data;
        !           373: 
        !           374:                    for (i = 0; i < height; i++) {
        !           375:                        Write(client, old, width);
        !           376:                        old += width + 1;
        !           377:                    }
        !           378:                } else {
        !           379:                    Write(client, pm->data, size);
        !           380:                }
        !           381:                /* Pad amount written to 32-bit boundary - Ahem! */
        !           382:                if (size%4) {
        !           383:                    Write(client, pm->data, 4 - (size%4));
        !           384:                }
        !           385:            }
        !           386:            break;
        !           387:        }
        !           388:        break;
        !           389:        }
        !           390:     case XYColorPixmap:
        !           391:        /*NOTREACHED*/
        !           392:        break;
        !           393:     }
        !           394:     FreePixmap(pm);
        !           395: }
        !           396: 
        !           397: static ZtoXY(w, h, d, old, new)
        !           398: int    w, h, d;
        !           399: caddr_t        old;
        !           400: u_char *new;
        !           401: {
        !           402:     unsigned mask = 1;
        !           403:     struct pixrect *New, *Old;
        !           404: 
        !           405:     Old = mem_point(w, h, d, old);
        !           406:     while (d--) {
        !           407:        register int y;
        !           408: 
        !           409:        New = mem_point(w, h, 1, new);
        !           410:        new += BitmapSize(w, h);
        !           411:        for (y = 0; y < h; y++) {
        !           412:            register int x;
        !           413: 
        !           414:            for (x = 0; x < w; x++) {
        !           415:                pr_put(New, x, y, (pr_get(Old, x, y) & mask));
        !           416:            }
        !           417:        }
        !           418:        pr_destroy(New);
        !           419:        mask <<= 1;
        !           420:     }
        !           421: }
        !           422: #endif

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