diff options
Diffstat (limited to 'src/libdraw/memdraw.h')
| -rw-r--r-- | src/libdraw/memdraw.h | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/src/libdraw/memdraw.h b/src/libdraw/memdraw.h new file mode 100644 index 00000000..08784ce9 --- /dev/null +++ b/src/libdraw/memdraw.h @@ -0,0 +1,209 @@ +typedef struct Memimage Memimage; +typedef struct Memdata Memdata; +typedef struct Memsubfont Memsubfont; +typedef struct Memlayer Memlayer; +typedef struct Memcmap Memcmap; +typedef struct Memdrawparam Memdrawparam; + +/* + * 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 +{ + u32int *base; /* allocated data pointer */ + uchar *bdata; /* pointer to first byte of actual data; word-aligned */ + int ref; /* number of Memimages using this data */ + void* imref; + int 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 */ + int depth; /* number of bits of storage per pixel */ + int nchan; /* number of channels */ + u32int chan; /* channel descriptions */ + Memcmap *cmap; + + Memdata *data; /* pointer to data; shared by windows in this image */ + int 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; + void *X; + + int shift[NChan]; + int mask[NChan]; + int 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; + short 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; + int 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*, void*); +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* wordaddr(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); +extern u32int pixelbits(Memimage*, Point); + +/* + * 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 void 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 + */ +void memimagemove(void*, void*); + +/* + * Kernel cruft + */ +extern void rdb(void); +extern int iprint(char*, ...); +extern int drawdebug; + +/* + * For other implementations, like x11. + */ +extern void _memfillcolor(Memimage*, u32int); +extern Memimage* _allocmemimage(Rectangle, u32int); +extern int _cloadmemimage(Memimage*, Rectangle, uchar*, int); +extern int _loadmemimage(Memimage*, Rectangle, uchar*, int); +extern void _freememimage(Memimage*); +extern u32int _rgbatoimg(Memimage*, u32int); +extern u32int _imgtorgba(Memimage*, u32int); +extern u32int _pixelbits(Memimage*, Point); +extern int _unloadmemimage(Memimage*, Rectangle, uchar*, int); +extern Memdrawparam* _memimagedrawsetup(Memimage*, + Rectangle, Memimage*, Point, Memimage*, + Point, int); +extern void _memimagedraw(Memdrawparam*); +extern void _drawreplacescreenimage(Memimage*); |