1 #ifdef PLAN9 2 #pragma src "/sys/src/libdraw" 3 #pragma lib "libdraw.a" 4 #endif 5 6 typedef struct Cachefont Cachefont; 7 typedef struct Cacheinfo Cacheinfo; 8 typedef struct Cachesubf Cachesubf; 9 typedef struct Display Display; 10 typedef struct Font Font; 11 typedef struct Fontchar Fontchar; 12 typedef struct Image Image; 13 typedef struct Mouse Mouse; 14 typedef struct Point Point; 15 typedef struct Rectangle Rectangle; 16 typedef struct RGB RGB; 17 typedef struct Screen Screen; 18 typedef struct Subfont Subfont; 19 20 #ifdef VARARGCK 21 #pragma varargck type "R" Rectangle 22 #pragma varargck type "P" Point 23 #endif 24 extern int Rfmt(Fmt*); 25 extern int Pfmt(Fmt*); 26 27 enum 28 { 29 DOpaque = 0xFFFFFFFF, 30 DTransparent = 0x00000000, /* only useful for allocimage, memfillcolor */ 31 DBlack = 0x000000FF, 32 DWhite = 0xFFFFFFFF, 33 DRed = 0xFF0000FF, 34 DGreen = 0x00FF00FF, 35 DBlue = 0x0000FFFF, 36 DCyan = 0x00FFFFFF, 37 DMagenta = 0xFF00FFFF, 38 DYellow = 0xFFFF00FF, 39 DPaleyellow = 0xFFFFAAFF, 40 DDarkyellow = 0xEEEE9EFF, 41 DDarkgreen = 0x448844FF, 42 DPalegreen = 0xAAFFAAFF, 43 DMedgreen = 0x88CC88FF, 44 DDarkblue = 0x000055FF, 45 DPalebluegreen= 0xAAFFFFFF, 46 DPaleblue = 0x0000BBFF, 47 DBluegreen = 0x008888FF, 48 DGreygreen = 0x55AAAAFF, 49 DPalegreygreen = 0x9EEEEEFF, 50 DYellowgreen = 0x99994CFF, 51 DMedblue = 0x000099FF, 52 DGreyblue = 0x005DBBFF, 53 DPalegreyblue = 0x4993DDFF, 54 DPurpleblue = 0x8888CCFF, 55 56 DNotacolor = 0xFFFFFF00, 57 DNofill = DNotacolor, 58 59 }; 60 61 enum 62 { 63 Displaybufsize = 8000, 64 ICOSSCALE = 1024, 65 Borderwidth = 4, 66 }; 67 68 enum 69 { 70 /* refresh methods */ 71 Refbackup = 0, 72 Refnone = 1, 73 Refmesg = 2 74 }; 75 #define NOREFRESH ((void*)-1) 76 77 enum 78 { 79 /* line ends */ 80 Endsquare = 0, 81 Enddisc = 1, 82 Endarrow = 2, 83 Endmask = 0x1F 84 }; 85 86 #define ARROW(a, b, c) (Endarrow|((a)<<5)|((b)<<14)|((c)<<23)) 87 88 typedef enum 89 { 90 /* Porter-Duff compositing operators */ 91 Clear = 0, 92 93 SinD = 8, 94 DinS = 4, 95 SoutD = 2, 96 DoutS = 1, 97 98 S = SinD|SoutD, 99 SoverD = SinD|SoutD|DoutS, 100 SatopD = SinD|DoutS, 101 SxorD = SoutD|DoutS, 102 103 D = DinS|DoutS, 104 DoverS = DinS|DoutS|SoutD, 105 DatopS = DinS|SoutD, 106 DxorS = DoutS|SoutD, /* == SxorD */ 107 108 Ncomp = 12, 109 } Drawop; 110 111 /* 112 * image channel descriptors 113 */ 114 enum { 115 CRed = 0, 116 CGreen, 117 CBlue, 118 CGrey, 119 CAlpha, 120 CMap, 121 CIgnore, 122 NChan, 123 }; 124 125 #define __DC(type, nbits) ((((type)&15)<<4)|((nbits)&15)) 126 #define CHAN1(a,b) __DC(a,b) 127 #define CHAN2(a,b,c,d) (CHAN1((a),(b))<<8|__DC((c),(d))) 128 #define CHAN3(a,b,c,d,e,f) (CHAN2((a),(b),(c),(d))<<8|__DC((e),(f))) 129 #define CHAN4(a,b,c,d,e,f,g,h) (CHAN3((a),(b),(c),(d),(e),(f))<<8|__DC((g),(h))) 130 131 #define NBITS(c) ((c)&15) 132 #define TYPE(c) (((c)>>4)&15) 133 134 enum { 135 GREY1 = CHAN1(CGrey, 1), 136 GREY2 = CHAN1(CGrey, 2), 137 GREY4 = CHAN1(CGrey, 4), 138 GREY8 = CHAN1(CGrey, 8), 139 CMAP8 = CHAN1(CMap, 8), 140 RGB15 = CHAN4(CIgnore, 1, CRed, 5, CGreen, 5, CBlue, 5), 141 RGB16 = CHAN3(CRed, 5, CGreen, 6, CBlue, 5), 142 RGB24 = CHAN3(CRed, 8, CGreen, 8, CBlue, 8), 143 BGR24 = CHAN3(CBlue, 8, CGreen, 8, CRed, 8), 144 RGBA32 = CHAN4(CRed, 8, CGreen, 8, CBlue, 8, CAlpha, 8), 145 ARGB32 = CHAN4(CAlpha, 8, CRed, 8, CGreen, 8, CBlue, 8), /* stupid VGAs */ 146 XRGB32 = CHAN4(CIgnore, 8, CRed, 8, CGreen, 8, CBlue, 8), 147 XBGR32 = CHAN4(CIgnore, 8, CBlue, 8, CGreen, 8, CRed, 8), 148 }; 149 150 extern char* chantostr(char*, ulong); 151 extern ulong strtochan(char*); 152 extern int chantodepth(ulong); 153 154 struct Point 155 { 156 int x; 157 int y; 158 }; 159 160 struct Rectangle 161 { 162 Point min; 163 Point max; 164 }; 165 166 typedef void (*Reffn)(Image*, Rectangle, void*); 167 168 struct Screen 169 { 170 Display *display; /* display holding data */ 171 int id; /* id of system-held Screen */ 172 Image *image; /* unused; for reference only */ 173 Image *fill; /* color to paint behind windows */ 174 }; 175 176 struct Display 177 { 178 QLock qlock; 179 int locking; /*program is using lockdisplay */ 180 int dirno; 181 int fd; 182 int reffd; 183 int ctlfd; 184 int imageid; 185 int local; 186 void (*error)(Display*, char*); 187 char *devdir; 188 char *windir; 189 char oldlabel[64]; 190 ulong dataqid; 191 Image *white; 192 Image *black; 193 Image *opaque; 194 Image *transparent; 195 Image *image; 196 uchar *buf; 197 int bufsize; 198 uchar *bufp; 199 Font *defaultfont; 200 Subfont *defaultsubfont; 201 Image *windows; 202 Image *screenimage; 203 int _isnewdisplay; 204 }; 205 206 struct Image 207 { 208 Display *display; /* display holding data */ 209 int id; /* id of system-held Image */ 210 Rectangle r; /* rectangle in data area, local coords */ 211 Rectangle clipr; /* clipping region */ 212 int depth; /* number of bits per pixel */ 213 ulong chan; 214 int repl; /* flag: data replicates to tile clipr */ 215 Screen *screen; /* 0 if not a window */ 216 Image *next; /* next in list of windows */ 217 }; 218 219 struct RGB 220 { 221 ulong red; 222 ulong green; 223 ulong blue; 224 }; 225 226 /* 227 * Subfonts 228 * 229 * given char c, Subfont *f, Fontchar *i, and Point p, one says 230 * i = f->info+c; 231 * draw(b, Rect(p.x+i->left, p.y+i->top, 232 * p.x+i->left+((i+1)->x-i->x), p.y+i->bottom), 233 * color, f->bits, Pt(i->x, i->top)); 234 * p.x += i->width; 235 * to draw characters in the specified color (itself an Image) in Image b. 236 */ 237 238 struct Fontchar 239 { 240 int x; /* left edge of bits */ 241 uchar top; /* first non-zero scan-line */ 242 uchar bottom; /* last non-zero scan-line + 1 */ 243 char left; /* offset of baseline */ 244 uchar width; /* width of baseline */ 245 }; 246 247 struct Subfont 248 { 249 char *name; 250 short n; /* number of chars in font */ 251 uchar height; /* height of image */ 252 char ascent; /* top of image to baseline */ 253 Fontchar *info; /* n+1 character descriptors */ 254 Image *bits; /* of font */ 255 int ref; 256 }; 257 258 enum 259 { 260 /* starting values */ 261 LOG2NFCACHE = 6, 262 NFCACHE = (1<<LOG2NFCACHE), /* #chars cached */ 263 NFLOOK = 5, /* #chars to scan in cache */ 264 NFSUBF = 2, /* #subfonts to cache */ 265 /* max value */ 266 MAXFCACHE = 1024+NFLOOK, /* upper limit */ 267 MAXSUBF = 50, /* generous upper limit */ 268 /* deltas */ 269 DSUBF = 4, 270 /* expiry ages */ 271 SUBFAGE = 10000, 272 CACHEAGE = 10000 273 }; 274 275 struct Cachefont 276 { 277 Rune min; /* lowest rune value to be taken from subfont */ 278 Rune max; /* highest rune value+1 to be taken from subfont */ 279 int offset; /* position in subfont of character at min */ 280 char *name; /* stored in font */ 281 char *subfontname; /* to access subfont */ 282 }; 283 284 struct Cacheinfo 285 { 286 ushort x; /* left edge of bits */ 287 uchar width; /* width of baseline */ 288 schar left; /* offset of baseline */ 289 Rune value; /* value of character at this slot in cache */ 290 ushort age; 291 }; 292 293 struct Cachesubf 294 { 295 ulong age; /* for replacement */ 296 Cachefont *cf; /* font info that owns us */ 297 Subfont *f; /* attached subfont */ 298 }; 299 300 struct Font 301 { 302 char *name; 303 Display *display; 304 short height; /* max height of image, interline spacing */ 305 short ascent; /* top of image to baseline */ 306 short width; /* widest so far; used in caching only */ 307 short nsub; /* number of subfonts */ 308 ulong age; /* increasing counter; used for LRU */ 309 int maxdepth; /* maximum depth of all loaded subfonts */ 310 int ncache; /* size of cache */ 311 int nsubf; /* size of subfont list */ 312 Cacheinfo *cache; 313 Cachesubf *subf; 314 Cachefont **sub; /* as read from file */ 315 Image *cacheimage; 316 }; 317 318 #define Dx(r) ((r).max.x-(r).min.x) 319 #define Dy(r) ((r).max.y-(r).min.y) 320 321 /* 322 * Image management 323 */ 324 extern Image* _allocimage(Image*, Display*, Rectangle, ulong, int, ulong, int, int); 325 extern Image* allocimage(Display*, Rectangle, ulong, int, ulong); 326 extern uchar* bufimage(Display*, int); 327 extern int bytesperline(Rectangle, int); 328 extern void closedisplay(Display*); 329 extern void drawerror(Display*, char*); 330 extern int flushimage(Display*, int); 331 extern int freeimage(Image*); 332 extern int _freeimage1(Image*); 333 extern int geninitdraw(char*, void(*)(Display*, char*), char*, char*, char*, int); 334 extern int initdraw(void(*)(Display*, char*), char*, char*); 335 extern int newwindow(char*); 336 extern Display* initdisplay(char*, char*, void(*)(Display*, char*)); 337 extern int loadimage(Image*, Rectangle, uchar*, int); 338 extern int cloadimage(Image*, Rectangle, uchar*, int); 339 extern int getwindow(Display*, int); 340 extern int gengetwindow(Display*, char*, Image**, Screen**, int); 341 extern Image* readimage(Display*, int, int); 342 extern Image* creadimage(Display*, int, int); 343 extern int unloadimage(Image*, Rectangle, uchar*, int); 344 extern int wordsperline(Rectangle, int); 345 extern int writeimage(int, Image*, int); 346 extern Image* namedimage(Display*, char*); 347 extern int nameimage(Image*, char*, int); 348 extern Image* allocimagemix(Display*, ulong, ulong); 349 350 /* 351 * Colors 352 */ 353 extern void readcolmap(Display*, RGB*); 354 extern void writecolmap(Display*, RGB*); 355 extern ulong setalpha(ulong, uchar); 356 357 /* 358 * Windows 359 */ 360 extern Screen* allocscreen(Image*, Image*, int); 361 extern Image* _allocwindow(Image*, Screen*, Rectangle, int, ulong); 362 extern Image* allocwindow(Screen*, Rectangle, int, ulong); 363 extern void bottomnwindows(Image**, int); 364 extern void bottomwindow(Image*); 365 extern int freescreen(Screen*); 366 extern Screen* publicscreen(Display*, int, ulong); 367 extern void topnwindows(Image**, int); 368 extern void topwindow(Image*); 369 extern int originwindow(Image*, Point, Point); 370 371 /* 372 * Geometry 373 */ 374 extern Point Pt(int, int); 375 extern Rectangle Rect(int, int, int, int); 376 extern Rectangle Rpt(Point, Point); 377 extern Point addpt(Point, Point); 378 extern Point subpt(Point, Point); 379 extern Point divpt(Point, int); 380 extern Point mulpt(Point, int); 381 extern int eqpt(Point, Point); 382 extern int eqrect(Rectangle, Rectangle); 383 extern Rectangle insetrect(Rectangle, int); 384 extern Rectangle rectaddpt(Rectangle, Point); 385 extern Rectangle rectsubpt(Rectangle, Point); 386 extern Rectangle canonrect(Rectangle); 387 extern int rectXrect(Rectangle, Rectangle); 388 extern int rectinrect(Rectangle, Rectangle); 389 extern void combinerect(Rectangle*, Rectangle); 390 extern int rectclip(Rectangle*, Rectangle); 391 extern int ptinrect(Point, Rectangle); 392 extern void replclipr(Image*, int, Rectangle); 393 extern int drawreplxy(int, int, int); /* used to be drawsetxy */ 394 extern Point drawrepl(Rectangle, Point); 395 extern int rgb2cmap(int, int, int); 396 extern int cmap2rgb(int); 397 extern int cmap2rgba(int); 398 extern void icossin(int, int*, int*); 399 extern void icossin2(int, int, int*, int*); 400 401 /* 402 * Graphics 403 */ 404 extern void draw(Image*, Rectangle, Image*, Image*, Point); 405 extern void drawop(Image*, Rectangle, Image*, Image*, Point, Drawop); 406 extern void gendraw(Image*, Rectangle, Image*, Point, Image*, Point); 407 extern void gendrawop(Image*, Rectangle, Image*, Point, Image*, Point, Drawop); 408 extern void line(Image*, Point, Point, int, int, int, Image*, Point); 409 extern void lineop(Image*, Point, Point, int, int, int, Image*, Point, Drawop); 410 extern void poly(Image*, Point*, int, int, int, int, Image*, Point); 411 extern void polyop(Image*, Point*, int, int, int, int, Image*, Point, Drawop); 412 extern void fillpoly(Image*, Point*, int, int, Image*, Point); 413 extern void fillpolyop(Image*, Point*, int, int, Image*, Point, Drawop); 414 extern Point string(Image*, Point, Image*, Point, Font*, char*); 415 extern Point stringop(Image*, Point, Image*, Point, Font*, char*, Drawop); 416 extern Point stringn(Image*, Point, Image*, Point, Font*, char*, int); 417 extern Point stringnop(Image*, Point, Image*, Point, Font*, char*, int, Drawop); 418 extern Point runestring(Image*, Point, Image*, Point, Font*, Rune*); 419 extern Point runestringop(Image*, Point, Image*, Point, Font*, Rune*, Drawop); 420 extern Point runestringn(Image*, Point, Image*, Point, Font*, Rune*, int); 421 extern Point runestringnop(Image*, Point, Image*, Point, Font*, Rune*, int, Drawop); 422 extern Point stringbg(Image*, Point, Image*, Point, Font*, char*, Image*, Point); 423 extern Point stringbgop(Image*, Point, Image*, Point, Font*, char*, Image*, Point, Drawop); 424 extern Point stringnbg(Image*, Point, Image*, Point, Font*, char*, int, Image*, Point); 425 extern Point stringnbgop(Image*, Point, Image*, Point, Font*, char*, int, Image*, Point, Drawop); 426 extern Point runestringbg(Image*, Point, Image*, Point, Font*, Rune*, Image*, Point); 427 extern Point runestringbgop(Image*, Point, Image*, Point, Font*, Rune*, Image*, Point, Drawop); 428 extern Point runestringnbg(Image*, Point, Image*, Point, Font*, Rune*, int, Image*, Point); 429 extern Point runestringnbgop(Image*, Point, Image*, Point, Font*, Rune*, int, Image*, Point, Drawop); 430 extern Point _string(Image*, Point, Image*, Point, Font*, char*, Rune*, int, Rectangle, Image*, Point, Drawop); 431 extern Point stringsubfont(Image*, Point, Image*, Subfont*, char*); 432 extern int bezier(Image*, Point, Point, Point, Point, int, int, int, Image*, Point); 433 extern int bezierop(Image*, Point, Point, Point, Point, int, int, int, Image*, Point, Drawop); 434 extern int bezspline(Image*, Point*, int, int, int, int, Image*, Point); 435 extern int bezsplineop(Image*, Point*, int, int, int, int, Image*, Point, Drawop); 436 extern int bezsplinepts(Point*, int, Point**); 437 extern int fillbezier(Image*, Point, Point, Point, Point, int, Image*, Point); 438 extern int fillbezierop(Image*, Point, Point, Point, Point, int, Image*, Point, Drawop); 439 extern int fillbezspline(Image*, Point*, int, int, Image*, Point); 440 extern int fillbezsplineop(Image*, Point*, int, int, Image*, Point, Drawop); 441 extern void ellipse(Image*, Point, int, int, int, Image*, Point); 442 extern void ellipseop(Image*, Point, int, int, int, Image*, Point, Drawop); 443 extern void fillellipse(Image*, Point, int, int, Image*, Point); 444 extern void fillellipseop(Image*, Point, int, int, Image*, Point, Drawop); 445 extern void arc(Image*, Point, int, int, int, Image*, Point, int, int); 446 extern void arcop(Image*, Point, int, int, int, Image*, Point, int, int, Drawop); 447 extern void fillarc(Image*, Point, int, int, Image*, Point, int, int); 448 extern void fillarcop(Image*, Point, int, int, Image*, Point, int, int, Drawop); 449 extern void border(Image*, Rectangle, int, Image*, Point); 450 extern void borderop(Image*, Rectangle, int, Image*, Point, Drawop); 451 452 /* 453 * Font management 454 */ 455 extern Font* openfont(Display*, char*); 456 extern Font* buildfont(Display*, char*, char*); 457 extern void freefont(Font*); 458 extern Font* mkfont(Subfont*, Rune); 459 extern int cachechars(Font*, char**, Rune**, ushort*, int, int*, char**); 460 extern void agefont(Font*); 461 extern Subfont* allocsubfont(char*, int, int, int, Fontchar*, Image*); 462 extern Subfont* lookupsubfont(Display*, char*); 463 extern void installsubfont(char*, Subfont*); 464 extern void uninstallsubfont(Subfont*); 465 extern void freesubfont(Subfont*); 466 extern Subfont* readsubfont(Display*, char*, int, int); 467 extern Subfont* readsubfonti(Display*, char*, int, Image*, int); 468 extern int writesubfont(int, Subfont*); 469 extern void _unpackinfo(Fontchar*, uchar*, int); 470 extern Point stringsize(Font*, char*); 471 extern int stringwidth(Font*, char*); 472 extern int stringnwidth(Font*, char*, int); 473 extern Point runestringsize(Font*, Rune*); 474 extern int runestringwidth(Font*, Rune*); 475 extern int runestringnwidth(Font*, Rune*, int); 476 extern Point strsubfontwidth(Subfont*, char*); 477 extern int loadchar(Font*, Rune, Cacheinfo*, int, int, char**); 478 extern char* subfontname(char*, char*, int); 479 extern Subfont* _getsubfont(Display*, char*); 480 extern Subfont* getdefont(Display*); 481 extern void lockdisplay(Display*); 482 extern void unlockdisplay(Display*); 483 extern int drawlsetrefresh(ulong, int, void*, void*); 484 485 /* 486 * Predefined 487 */ 488 extern uchar defontdata[]; 489 extern int sizeofdefont; 490 extern Point ZP; 491 extern Rectangle ZR; 492 493 /* 494 * Set up by initdraw() 495 */ 496 extern Display *display; 497 extern Font *font; 498 /* extern Image *screen; */ 499 extern Screen *_screen; 500 extern int _cursorfd; 501 extern int _drawdebug; /* set to 1 to see errors from flushimage */ 502 extern void _setdrawop(Display*, Drawop); 503 504 #define BGSHORT(p) (((p)[0]<<0) | ((p)[1]<<8)) 505 #define BGLONG(p) ((BGSHORT(p)<<0) | (BGSHORT(p+2)<<16)) 506 #define BPSHORT(p, v) ((p)[0]=(v), (p)[1]=((v)>>8)) 507 #define BPLONG(p, v) (BPSHORT(p, (v)), BPSHORT(p+2, (v)>>16)) 508 509 /* 510 * Compressed image file parameters and helper routines 511 */ 512 #define NMATCH 3 /* shortest match possible */ 513 #define NRUN (NMATCH+31) /* longest match possible */ 514 #define NMEM 1024 /* window size */ 515 #define NDUMP 128 /* maximum length of dump */ 516 #define NCBLOCK 6000 /* size of compressed blocks */ 517 extern void _twiddlecompressed(uchar*, int); 518 extern int _compblocksize(Rectangle, int); 519 520 /* XXX backwards helps; should go */ 521 extern int log2[]; 522 extern ulong drawld2chan[]; 523 extern void drawsetdebug(int); 524