ref: 6dce09cec3bf6a689fa9a3f838df67d7d48d9d1a
dir: /include/memdraw.h/
#pragma src "/usr/inferno/libmemdraw" typedef struct Memimage Memimage; typedef struct Memdata Memdata; typedef struct Memsubfont Memsubfont; typedef struct Memlayer Memlayer; typedef struct Memcmap Memcmap; typedef struct Memdrawparam Memdrawparam; #pragma incomplete Memlayer /* * Memdata is allocated from main pool, but .data from the image pool. * Memdata is allocated separately to permit patching its pointer after * compaction when windows share the image data. * The first word of data is a back pointer to the Memdata, to find * The word to patch. */ struct Memdata { uintptr *base; /* allocated data pointer */ uchar *bdata; /* pointer to first byte of actual data; word-aligned */ s32int ref; /* number of Memimages using this data */ void* imref; s32int allocd; /* is this malloc'd? */ }; enum { Frepl = 1<<0, /* is replicated */ Fsimple = 1<<1, /* is 1x1 */ Fgrey = 1<<2, /* is grey */ Falpha = 1<<3, /* has explicit alpha */ Fcmap = 1<<4, /* has cmap channel */ Fbytes = 1<<5, /* has only 8-bit channels */ }; struct Memimage { Rectangle r; /* rectangle in data area, local coords */ Rectangle clipr; /* clipping region */ s32int depth; /* number of bits of storage per pixel */ s32int nchan; /* number of channels */ u32int chan; /* channel descriptions */ Memcmap *cmap; Memdata *data; /* pointer to data; shared by windows in this image */ s32int zero; /* data->bdata+zero==&byte containing (0,0) */ u32int width; /* width in words of a single scan line */ Memlayer *layer; /* nil if not a layer*/ u32int flags; s32int shift[NChan]; s32int mask[NChan]; s32int nbits[NChan]; }; struct Memcmap { uchar cmap2rgb[3*256]; uchar rgb2cmap[16*16*16]; }; /* * Subfonts * * given char c, Subfont *f, Fontchar *i, and Point p, one says * i = f->info+c; * draw(b, Rect(p.x+i->left, p.y+i->top, * p.x+i->left+((i+1)->x-i->x), p.y+i->bottom), * color, f->bits, Pt(i->x, i->top)); * p.x += i->width; * to draw characters in the specified color (itself a Memimage) in Memimage b. */ struct Memsubfont { char *name; s16int n; /* number of chars in font */ uchar height; /* height of bitmap */ char ascent; /* top of bitmap to baseline */ Fontchar *info; /* n+1 character descriptors */ Memimage *bits; /* of font */ }; /* * Encapsulated parameters and information for sub-draw routines. */ enum { Simplesrc=1<<0, Simplemask=1<<1, Replsrc=1<<2, Replmask=1<<3, Fullmask=1<<4, }; struct Memdrawparam { Memimage *dst; Rectangle r; Memimage *src; Rectangle sr; Memimage *mask; Rectangle mr; s32int op; u32int state; u32int mval; /* if Simplemask, the mask pixel in mask format */ u32int mrgba; /* mval in rgba */ u32int sval; /* if Simplesrc, the source pixel in src format */ u32int srgba; /* sval in rgba */ u32int sdval; /* sval in dst format */ }; /* * Memimage management */ extern Memimage* allocmemimage(Rectangle, u32int); extern Memimage* allocmemimaged(Rectangle, u32int, Memdata*); extern Memimage* readmemimage(int); extern Memimage* creadmemimage(int); extern int writememimage(int, Memimage*); extern void freememimage(Memimage*); extern int loadmemimage(Memimage*, Rectangle, uchar*, int); extern int cloadmemimage(Memimage*, Rectangle, uchar*, int); extern int unloadmemimage(Memimage*, Rectangle, uchar*, int); extern u32int* u32addr(Memimage*, Point); extern uchar* byteaddr(Memimage*, Point); extern int drawclip(Memimage*, Rectangle*, Memimage*, Point*, Memimage*, Point*, Rectangle*, Rectangle*); extern void memfillcolor(Memimage*, u32int); extern int memsetchan(Memimage*, u32int); /* * Graphics */ extern void memdraw(Memimage*, Rectangle, Memimage*, Point, Memimage*, Point, int); extern void memline(Memimage*, Point, Point, int, int, int, Memimage*, Point, int); extern void mempoly(Memimage*, Point*, int, int, int, int, Memimage*, Point, int); extern void memfillpoly(Memimage*, Point*, int, int, Memimage*, Point, int); extern void _memfillpolysc(Memimage*, Point*, int, int, Memimage*, Point, int, int, int, int); extern void memimagedraw(Memimage*, Rectangle, Memimage*, Point, Memimage*, Point, int); extern int hwdraw(Memdrawparam*); extern void memimageline(Memimage*, Point, Point, int, int, int, Memimage*, Point, int); extern void _memimageline(Memimage*, Point, Point, int, int, int, Memimage*, Point, Rectangle, int); extern Point memimagestring(Memimage*, Point, Memimage*, Point, Memsubfont*, char*); extern void memellipse(Memimage*, Point, int, int, int, Memimage*, Point, int); extern void memarc(Memimage*, Point, int, int, int, Memimage*, Point, int, int, int); extern Rectangle memlinebbox(Point, Point, int, int, int); extern int memlineendsize(int); extern void _memmkcmap(void); extern s32 memimageinit(void); /* * Subfont management */ extern Memsubfont* allocmemsubfont(char*, int, int, int, Fontchar*, Memimage*); extern Memsubfont* openmemsubfont(char*); extern void freememsubfont(Memsubfont*); extern Point memsubfontwidth(Memsubfont*, char*); extern Memsubfont* getmemdefont(void); /* * Predefined */ extern Memimage* memwhite; extern Memimage* memblack; extern Memimage* memopaque; extern Memimage* memtransparent; extern Memcmap *memdefcmap; /* * Kernel interface */ Memdata* attachscreen(Rectangle*, ulong*, int*, int*, int*); void memimagemove(void*, void*); /* * Kernel cruft */ extern void rdb(void); extern int iprint(char*, ...); #pragma varargck argpos iprint 1 extern int drawdebug; /* * doprint interface: numbconv bit strings */ #pragma varargck type "llb" vlong #pragma varargck type "llb" uvlong #pragma varargck type "lb" long #pragma varargck type "lb" ulong #pragma varargck type "b" int #pragma varargck type "b" uint