/usr/share/doc/libsdl-sge-dev/examples/rotate.cpp is in libsdl-sge-dev 030809dfsg-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | #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;
}
|