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/* copyright (c) 2007 magnus auvinen, see licence.txt for more info */
#include <engine/e_interface.h>
#include <engine/e_config.h>
#include "gc_mapres_tilemap.h"
#include "gc_mapres_image.h"
#include "../g_mapres.h"
enum
{
TILEFLAG_VFLIP=1,
TILEFLAG_HFLIP=2,
};
int tilemap_init()
{
return 0;
}
/*
struct render_info
{
unsigned char *data;
};
void tilemap_render_one()*/
void tilemap_render(float scale, int fg)
{
if(!map_is_loaded())
return;
float screen_x0, screen_y0, screen_x1, screen_y1;
gfx_getscreen(&screen_x0, &screen_y0, &screen_x1, &screen_y1);
// fetch indecies
int start, num;
map_get_type(MAPRES_TILEMAP, &start, &num);
// render tilemaps
int passed_main = 0;
for(int t = 0; t < num; t++)
{
mapres_tilemap *tmap = (mapres_tilemap *)map_get_item(start+t,0,0);
unsigned char *data = (unsigned char *)map_get_data(tmap->data);
if(tmap->main)
passed_main = 1;
if((fg && passed_main) || (!fg && !passed_main))
{
if(!config.gfx_high_detail && !tmap->main)
continue;
gfx_texture_set(img_get(tmap->image));
gfx_quads_begin();
int starty = (int)(screen_y0/scale)-1;
int startx = (int)(screen_x0/scale)-1;
int endy = (int)(screen_y1/scale)+1;
int endx = (int)(screen_x1/scale)+1;
float frac = (1.25f/1024.0f);//2.0f; //2.0f;
float texsize = 1024.0f;
float nudge = 0.5f/texsize;
for(int y = starty; y < endy; y++)
for(int x = startx; x < endx; x++)
{
int mx = x;
int my = y;
if(mx<0) mx = 0;
if(mx>=tmap->width) mx = tmap->width-1;
if(my<0) my = 0;
if(my>=tmap->height) my = tmap->height-1;
int c = mx + my*tmap->width;
unsigned char d = data[c*2];
unsigned char f = data[c*2+1];
if(d)
{
int tx = d%16;
int ty = d/16;
int px0 = tx*(1024/16);
int py0 = ty*(1024/16);
int px1 = (tx+1)*(1024/16)-1;
int py1 = (ty+1)*(1024/16)-1;
float u0 = nudge + px0/texsize+frac;
float v0 = nudge + py0/texsize+frac;
float u1 = nudge + px1/texsize-frac;
float v1 = nudge + py1/texsize-frac;
if(f&TILEFLAG_VFLIP)
{
float tmp = u0;
u0 = u1;
u1 = tmp;
}
if(f&TILEFLAG_HFLIP)
{
float tmp = v0;
v0 = v1;
v1 = tmp;
}
gfx_quads_setsubset(u0,v0,u1,v1);
gfx_quads_drawTL(x*scale, y*scale, scale, scale);
}
}
gfx_quads_end();
}
}
}
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