#ifndef INCLUDED_TASK_DRAW_SPAN
#define INCLUDED_TASK_DRAW_SPAN

#include "SchedTask.h"
#include "Tapestry.h"
#include "SpanPack.h"
#if !USE_MEMHASH
#include "TileHash.h"
#endif

struct g {
    int *linebuf;
    float *zRow;
    TileListPtr tileList;
    int doneWrite;
} G, *Gptr; 



static    int* linebuf_init(SchedTask *smanager, int width, int height, int rgb);
static    float* zRow_init(SchedTask *smanager, int width, int height);
static    TilePtr set_rgb(memaddr addr, int wait_tag);
static    void set_rgbs(memaddr addr, uint32 *max_addr, int wait_tag);
static    uint32 get_rgb(int tx, int ty, TilePtr tile);
static    TilePtr isAvailableTile(memaddr addr);
static    memaddr getTile(int tx, int ty, int tw, memaddr tex_addr_top);
static    int getTexBlock(int tx, int ty, int twidth);
static    void writebuffer(SchedTask *smanager, unsigned int display, 
	    int width, int height, int screen_width);
static    void updateBuffer(float zpos, int rangex, int x, int y,
                      int tex_x, int tex_y, float normal_x, float nomral_x, float normal_z, TilePtr tile);


static    void reboot(SpanPackPtr spack, int cur_span_x);

static    int drawDot1(SchedTask *smanager, SpanPtr span, int startx, int endx, int wait_tag);
static    void drawDot2(SchedTask *smanager, SpanPtr span, int startx, int endx, int js, int wait_tag);
static    int drawLine1(SchedTask *smanager, SpanPtr span, int startx, int endx, int wait_tag);
static    void drawLine2(SchedTask *smanager, SpanPtr span, int startx, int endx, int js, int wait_tag);
static    int infinity_light_calc(int color,float normal_x, float normal_y, float normal_z);
};

typedef struct {
    uint32 display;
    int screen_width;
    int rangex_start;
    int rangex_end;
    int rangey;
} DrawSpanArg, *DrawSpanArgPtr;

#endif