drawing on a loaded image

drawing on a loaded image

Sylvarant

Member #7,886

October 2006

I want to draw a self created bitmap ( I created it in allegro and drew some stuff on to it) onto the screen, wich is filled with an image (I used draw sprite for that). But my self created bitmap keeps flickering.

HardTranceFan

Member #7,317

June 2006

code?

--
"Shame your mind don't shine like your possessions do" - Faithless (I want more part 1)

Sylvarant

Member #7,886

October 2006

"code?"

1// window class constructor
2 
3 // set custom bitmap
4window_bitmap = create_bitmap(width,height); 
5clear_bitmap(window_bitmap);
6 
7// buffer 
8declarations::frame_create(0,0,width,height,window_bitmap);
9set_background(2,2,width-4,height-4,"Window_skin.bmp"); 
10set_item(item_x,item_y,item_path);
11set_text(text_x,text_y,window_font,text); 
12 
13// draw to screen
14vsync();
15blit(window_bitmap,screen,0,0,x,y,window_bitmap->w,window_bitmap->h); 
16 
17 
18-----------------------------------------------------------------------
19// main loop
20 
21 while (!key[KEY_ESC]) {   
22    BITMAP * map = declarations::bitmap_load("testmap.bmp");
23    draw_sprite(screen,map,0,0);
24    Window * win = new Window(100,249,400,100);                      
25    win->draw_item(2,2,"Face.bmp");
26    win->draw_text(5,5,antique,"Hello there.");} 
27}

Rick

Member #3,572

June 2003

You want to double buffer this. Create another bitmap that you draw everything to. Call it say buffer. Then after you are done drawing everything, draw this buffer to the screen. Then clear this buffer bitmap and start all over again. That's called double buffering and is a basic idea of game programming.

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Actually I think I'm a tad ugly, but some women disagree, mostly Asians for some reason.

HardTranceFan

Member #7,317

June 2006

Why are you loading testmap.bmp within the while loop? Do it once before the loop.

--
"Shame your mind don't shine like your possessions do" - Faithless (I want more part 1)