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#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "SDL.h"
#include "sge.h"
int main(int argc, char** argv)
{
/* Init SDL */
if ( SDL_Init(SDL_INIT_TIMER|SDL_INIT_VIDEO) < 0 ) {
fprintf(stderr, "Couldn't load SDL: %s\n", SDL_GetError());
exit(1);
}
/* Clean up on exit */
atexit(SDL_Quit);
/* Set window title */
SDL_WM_SetCaption("Rotating Tux. Press [Space]/[s]!", "tux");
/* Initialize the display */
SDL_Surface *screen;
screen = SDL_SetVideoMode(300, 300, 0, SDL_SWSURFACE);
if ( screen == NULL ) {
fprintf(stderr, "Couldn't set video mode: %s\n", SDL_GetError());
exit(1);
}
/* Load the texture */
SDL_Surface *temp,*texture;
temp = SDL_LoadBMP("tux.bmp");
if ( temp == NULL ) {
fprintf(stderr, "Error: %s\n", SDL_GetError());
exit(1);
}
texture = SDL_DisplayFormat(temp); //Convert it to the screen format for speed
SDL_FreeSurface(temp);
//SDL_Rect r;
//r.x=40; r.y=40; r.w=40; r.h=40;
//SDL_SetClipRect(texture, &r);
Uint32 black = SDL_MapRGB(screen->format,0,0,0);
sge_Update_OFF();
SDL_Event event;
int loops=0;
Uint32 start=SDL_GetTicks();
/* Starting values*/
int angle=1;
Uint8 flag=SGE_TTMAP;
float xscale=3.0,yscale=3.0,xstep=-0.02, ystep=-0.01;
SDL_Rect new_rect, old_rect, tmp_rect;
old_rect.x=0; old_rect.y=0; old_rect.w=screen->w; old_rect.h=screen->h;
bool delay=false;
/* Main loop */
do{
if(delay)
SDL_Delay(20);
sge_FilledRect(screen, old_rect.x, old_rect.y, old_rect.x + old_rect.w-1, old_rect.y + old_rect.h-1, black);
new_rect = sge_transform(texture, screen, angle, xscale, yscale, texture->w/2,texture->h/2, 150,150, flag);
sge_RectUnion(tmp_rect, old_rect, new_rect);
sge_Update_ON();
sge_UpdateRect(screen,tmp_rect.x, tmp_rect.y, tmp_rect.w, tmp_rect.h);
sge_Update_OFF();
old_rect = new_rect;
/* Change degree and scale for next loop */
angle+=2;
yscale+=ystep;
xscale+=xstep;
if(angle>=360)
angle=1;
if(yscale>3.5 || yscale<-3.5)
ystep=-ystep;
if(xscale>3.5 || xscale<0)
xstep=-xstep;
loops++;
/* Check events */
if(SDL_PollEvent(&event)==1){
if(event.type==SDL_KEYDOWN && event.key.keysym.sym==SDLK_SPACE){
/* Change rendering method and report FPS for previous */
if(flag&SGE_TTMAP){
flag = 0;
printf("Texture mapping: %.2f FPS.\n",((double)loops*1000)/(SDL_GetTicks()-start));
}else if(flag==0){
flag = SGE_TAA;
printf("Normal rendering: %.2f FPS.\n",((double)loops*1000)/(SDL_GetTicks()-start));
}else{
flag=SGE_TTMAP;
printf("AA rendering: %.2f FPS.\n",((double)loops*1000)/(SDL_GetTicks()-start));
}
loops=0;
start=SDL_GetTicks();
}
if(event.type==SDL_KEYDOWN && event.key.keysym.sym==SDLK_s){
if(delay)
delay=false;
else
delay=true;
/* reset FPS */
loops=0;
start=SDL_GetTicks();
}
if(event.type==SDL_KEYDOWN && event.key.keysym.sym==SDLK_ESCAPE){break;}
if(event.type==SDL_QUIT){break;}
}
}while(true);
//Clean up
SDL_FreeSurface(texture);
//Show FPS
printf("%.2f FPS.\n",((double)loops*1000)/(SDL_GetTicks()-start));
return 0;
}
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