ref: 9084a389eba9cd1089560473306b57b418730ef5
dir: /r_shared.h/
// r_shared.h: general refresh-related stuff shared between the refresh and the
// driver
// FIXME: clean up and move into d_iface.h
#define MAXVERTS 16 // max points in a surface polygon
#define MAXWORKINGVERTS (MAXVERTS+4) // max points in an intermediate
// polygon (while processing)
// !!! if this is changed, it must be changed in d_ifacea.h too !!!
#define MAXHEIGHT 3840
#define MAXWIDTH 2160
#define MAXDIMENSION ((MAXHEIGHT > MAXWIDTH) ? MAXHEIGHT : MAXWIDTH)
#define SIN_BUFFER_SIZE (MAXDIMENSION+CYCLE)
//===================================================================
extern void R_DrawLine (polyvert_t *polyvert0, polyvert_t *polyvert1);
extern int cachewidth;
extern pixel_t *cacheblock;
extern int screenwidth;
extern float pixelAspect;
extern int r_drawnpolycount;
extern cvar_t r_clearcolor;
extern int sintable[SIN_BUFFER_SIZE];
extern int intsintable[SIN_BUFFER_SIZE];
extern vec3_t vup, base_vup;
extern vec3_t vpn, base_vpn;
extern vec3_t vright, base_vright;
extern entity_t *currententity;
// NOTE: these are only initial values. limits are supposed to scale up dynamically
#define MAXEDGES 2400
#define MAXSURFACES 800
#define MAXSPANS 3000
// !!! if this is changed, it must be changed in asm_draw.h too !!!
typedef struct espan_s
{
int u, v, count;
struct espan_s *pnext;
} espan_t;
// FIXME: compress, make a union if that will help
// insubmodel is only 1, flags is fewer than 32, spanstate could be a byte
typedef struct surf_s
{
struct surf_s *next; // active surface stack in r_edge.c
struct surf_s *prev; // used in r_edge.c for active surf stack
struct espan_s *spans; // pointer to linked list of spans to draw
int key; // sorting key (BSP order)
int last_u; // set during tracing
int spanstate; // 0 = not in span
// 1 = in span
// -1 = in inverted span (end before
// start)
int flags; // currentface flags
void *data; // associated data like msurface_t
entity_t *entity;
float nearzi; // nearest 1/z on surface, for mipmapping
qboolean insubmodel;
float d_ziorigin, d_zistepu, d_zistepv;
int pad[2]; // to 64 bytes
} surf_t;
extern int r_numallocatedbasespans;
extern byte *r_basespans;
extern surf_t *surfaces, *surface_p, *surf_max;
// surfaces are generated in back to front order by the bsp, so if a surf
// pointer is greater than another one, it should be drawn in front
// surfaces[1] is the background, and is used as the active surface stack.
// surfaces[0] is a dummy, because index 0 is used to indicate no surface
// attached to an edge_t
//===================================================================
extern vec3_t sxformaxis[4]; // s axis transformed into viewspace
extern vec3_t txformaxis[4]; // t axis transformed into viewspac
extern vec3_t modelorg, base_modelorg;
extern float xcenter, ycenter;
extern float xscale, yscale;
extern float xscaleinv, yscaleinv;
extern float xscaleshrink, yscaleshrink;
extern int d_lightstylevalue[256]; // 8.8 frac of base light value
extern void TransformVector (vec3_t in, vec3_t out);
extern void SetUpForLineScan(fixed8_t startvertu, fixed8_t startvertv,
fixed8_t endvertu, fixed8_t endvertv);
extern int ubasestep, errorterm, erroradjustup, erroradjustdown;
// flags in finalvert_t.flags
#define ALIAS_LEFT_CLIP 0x0001
#define ALIAS_TOP_CLIP 0x0002
#define ALIAS_RIGHT_CLIP 0x0004
#define ALIAS_BOTTOM_CLIP 0x0008
#define ALIAS_Z_CLIP 0x0010
// !!! if this is changed, it must be changed in d_ifacea.h too !!!
#define ALIAS_ONSEAM 0x0020 // also defined in modelgen.h;
// must be kept in sync
#define ALIAS_XY_CLIP_MASK 0x000F
// !!! if this is changed, it must be changed in asm_draw.h too !!!
typedef struct edge_s
{
fixed16_t u;
fixed16_t u_step;
struct edge_s *prev, *next;
unsigned int surfs[2];
struct edge_s *nextremove;
float nearzi;
medge_t *owner;
} edge_t;