int main(int argc, char* argv[])
{
GPU_Target* screen;
printRenderers();
screen = GPU_Init(800, 600, GPU_DEFAULT_INIT_FLAGS);
if(screen == NULL)
return -1;
printCurrentRenderer();
{
Uint32 startTime;
long frameCount;
Uint8 done;
SDL_Event event;
GPU_Image* image;
Uint32 v, f, p;
GPU_ShaderBlock block;
int uloc;
int timeloc;
float dt;
#define MAX_SPRITES 50
int numSprites;
float x[MAX_SPRITES];
float y[MAX_SPRITES];
float velx[MAX_SPRITES];
float vely[MAX_SPRITES];
int i;
image = GPU_LoadImage("data/test.bmp");
if(image == NULL)
return -1;
block = load_shaders(&v, &f, &p);
uloc = GPU_GetUniformLocation(p, "tex");
GPU_SetUniformi(uloc, 0);
timeloc = GPU_GetUniformLocation(p, "time");
dt = 0.010f;
startTime = SDL_GetTicks();
frameCount = 0;
numSprites = 1;
for(i = 0; i < MAX_SPRITES; i++)
{
x[i] = rand()%screen->w;
y[i] = rand()%screen->h;
velx[i] = 10 + rand()%screen->w/10;
vely[i] = 10 + rand()%screen->h/10;
}
done = 0;
while(!done)
{
while(SDL_PollEvent(&event))
{
if(event.type == SDL_QUIT)
done = 1;
else if(event.type == SDL_KEYDOWN)
{
if(event.key.keysym.sym == SDLK_ESCAPE)
done = 1;
else if(event.key.keysym.sym == SDLK_EQUALS || event.key.keysym.sym == SDLK_PLUS)
{
if(numSprites < MAX_SPRITES)
numSprites++;
}
else if(event.key.keysym.sym == SDLK_MINUS)
{
if(numSprites > 0)
numSprites--;
}
else if(event.key.keysym.sym == SDLK_SPACE)
{
if(GPU_IsDefaultShaderProgram(GPU_GetCurrentShaderProgram()))
{
GPU_ActivateShaderProgram(p, &block);
uloc = GPU_GetUniformLocation(p, "tex");
GPU_SetUniformi(uloc, 0);
timeloc = GPU_GetUniformLocation(p, "time");
}
else
GPU_ActivateShaderProgram(0, NULL);
}
}
}
for(i = 0; i < numSprites; i++)
{
x[i] += velx[i]*dt;
y[i] += vely[i]*dt;
if(x[i] < 0)
{
x[i] = 0;
velx[i] = -velx[i];
}
else if(x[i]> screen->w)
{
x[i] = screen->w;
velx[i] = -velx[i];
}
if(y[i] < 0)
{
y[i] = 0;
vely[i] = -vely[i];
}
else if(y[i]> screen->h)
{
y[i] = screen->h;
vely[i] = -vely[i];
}
}
GPU_SetUniformf(timeloc, SDL_GetTicks()/1000.0f);
GPU_Clear(screen);
for(i = 0; i < numSprites; i++)
{
GPU_Blit(image, NULL, screen, x[i], y[i]);
}
GPU_Flip(screen);
frameCount++;
if(frameCount%500 == 0)
printf("Average FPS: %.2f\n", 1000.0f*frameCount/(SDL_GetTicks() - startTime));
}
printf("Average FPS: %.2f\n", 1000.0f*frameCount/(SDL_GetTicks() - startTime));
GPU_FreeImage(image);
free_shaders(v, f, p);
}
GPU_Quit();
return 0;
}
void shader_program::deactivate()
{
if (GPU_GetCurrentShaderProgram() == program_object_) {
GPU_DeactivateShaderProgram();
}
}
