/* SUN version of portable bit-blt code. (S. A. Uhler) * The data on each line is padded to (BITS+1) bits */ #ifdef sun # include # include # include # include #endif #ifdef atarist # include # include char *_scrnbase; int _scrwidth, _scrheight, _scrplanes; short *Ptsin, *Intin; short _ptsin[10], _intsin[10]; #endif #include #include "bitmap.h" #define dprintf if(bit_debug)fprintf int bit_debug; static int _s_start; /* for our "vfree" */ static _s_len; /* open the display; it looks like memory */ BITMAP * bit_open(name) char *name; /* name of frame buffer */ { BITMAP *result = BIT_NULL; #ifdef sun int fd; /* file descriptor of frame buffer */ register DATA *addr; /* address of frame buffer */ struct fbtype buff; /* frame buffer parameters */ int pagesize; char *malloc(); /* open the SUN display */ if ((fd = open(name, O_RDWR)) < 0) return (BIT_NULL); /* get the frame buffer size */ if (ioctl(fd, FBIOGTYPE, &buff) < 0) return (BIT_NULL); /* malloc space for frame buffer */ pagesize = getpagesize(); if ((_s_start = (int) malloc(buff.fb_size + pagesize)) == 0) return (BIT_NULL); /* align space (and fb size) on a page boundary */ buff.fb_size = (buff.fb_size+pagesize-1) &~ (pagesize-1); addr = (DATA *) ((_s_start + pagesize - 1) & ~(pagesize - 1)); /* map the frame buffer into malloc'd space */ #ifdef _MAP_NEW /* New semantics for mmap in Sun release 4.0 */ addr = (DATA) mmap(addr, _s_len=buff.fb_size, PROT_READ|PROT_WRITE, _MAP_NEW|MAP_SHARED, fd, 0); if ((int)addr == -1) return (BIT_NULL); #else if (mmap(addr, _s_len = buff.fb_size, PROT_WRITE, MAP_SHARED, fd, 0) < 0) return (BIT_NULL); #endif if ((result = (BITMAP *) malloc(sizeof(BITMAP))) == (BITMAP *) 0) return (BIT_NULL); result->primary = result; result->data = addr; result->x0 = 0, result->y0 = 0, result->wide = buff.fb_width; result->high = buff.fb_height; result->type = _SCREEN; #endif sun #ifdef atarist extern void *malloc(); if ((result = (BITMAP *) malloc(sizeof(BITMAP))) == (BITMAP *) 0) return (BIT_NULL); result->primary = result; linea0(); Intin = __aline->_INTIN; if (!Intin) { __aline->_INTIN = Intin = _intsin; } Ptsin = __aline->_PTSIN; if (!Ptsin) { __aline->_PTSIN = Ptsin = _ptsin; } _scrplanes = __aline->_VPLANES; _scrheight = V_Y_MAX; _scrwidth = V_X_MAX; result->data = Logbase(); result->x0 = 0; result->y0 = 0; result->wide = _scrwidth; result->high = _scrheight; result->type = _SCREEN; #endif atarist return (result); } /* destroy a bitmap, free up space */ int bit_destroy(bitmap) BITMAP *bitmap; { if (bitmap == (BITMAP *) 0) return (-1); if (IS_MEMORY(bitmap) && IS_PRIMARY(bitmap)) free(bitmap->data); #ifndef atarist else if (IS_SCREEN(bitmap) && IS_PRIMARY(bitmap)) { munmap(BIT_DATA(bitmap), _s_len); free(_s_start); } #endif free(bitmap); return (0); } /* create a bitmap as a sub-rectangle of another bitmap */ BITMAP * bit_create(map, x, y, wide, high) BITMAP *map; int x, y, wide, high; { char *malloc(); register BITMAP *result; if (x + wide > map->wide) wide = map->wide - x; if (y + high > map->high) high = map->high - y; if (wide < 1 || high < 1) return (BIT_NULL); if ((result = (BITMAP *) malloc(sizeof(BITMAP))) == (BITMAP *) 0) return (BIT_NULL); result->data = map->data; result->x0 = map->x0 + x; result->y0 = map->y0 + y; result->wide = wide; result->high = high; result->primary = map->primary; result->type = map->type; return (result); } /* allocate space for, and create a memory bitmap */ BITMAP * bit_alloc(wide, high, data, bits) unsigned short wide, high; DATA *data; int bits; /* in preparation for color */ { char *malloc(); register BITMAP *result; register int size; if ((result = (BITMAP *) malloc(sizeof(BITMAP))) == (BITMAP *) 0) return (result); result->x0 = 0; result->y0 = 0; result->high = high; result->wide = wide; size = ((wide+BITS)/8) * high; if (data != (DATA *) 0) { /* point to user supplied data */ result->data = data; /* convert from external to internal format (if required) */ if (DOFLIP) { flip(data,size/sizeof(DATA)); } } else { /* malloc space: better be DATA aligned */ if ((result->data = (DATA *) malloc(size)) == (DATA *) 0) { free(result); return ((BITMAP *) 0); } bzero(result->data,size); } #ifdef atarist if ((int) result->data & 1) fprintf(stderr,"bit_alloc(): boundary alignment error\n"); #else if ((int) result->data &3) fprintf(stderr,"bit_alloc(): boundary alignment error\n"); #endif result->primary = result; result->type = _MEMORY; return (result); } /* flip the bit order on count elements of s */ static unsigned char flp[256] = { 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff, }; /* * Convert from external to internal bitmap format. Internal format * is SUN-3 bit order, 1=black, 0=white. This sample flip routine is * for the DEC3100, where 1=white, 0=black, and the bits in every byte * are revered */ int flip(s,count,how) register DATA *s; register int count; int how; /* not used */ { while (count-- > 0) *s++ = ~((flp[*s&0xff]) | (flp[*s>>8&0xff]<<8) | (flp[*s>>16&0xff]<<16) | (flp[*s>>24&0xff]<<24)); }