git.maemo.org Git - sdlhildon/blob - sdlhaa/test/alpha.c

   1 /* alpha - a simple SDL_haa sample with a RGBA transparent actor
   2  *
   3  * This file is in the public domain, furnished "as is", without technical
   4  * support, and with no warranty, express or implied, as to its usefulness for
   5  * any purpose.
   6  */
   7
   8 #include <stdlib.h>
   9 #include <stdio.h>
  10 #include <stdbool.h>
  11 #include <assert.h>
  12
  13 #include <SDL.h>
  14 #include <SDL_haa.h>
  15
  16 static SDL_Surface *screen;
  17
  18 static HAA_Actor *actor;
  19
  20 static int degrees = 0;
  21
  22 static Uint32 tick(Uint32 interval, void* param)
  23 {
  24         SDL_UserEvent e;
  25         e.type = SDL_USEREVENT;
  26
  27         degrees = (degrees+2) % 360;
  28         SDL_PushEvent((SDL_Event*)&e);
  29
  30         return interval;
  31 }
  32
  33 int main()
  34 {
  35         int res;
  36         res = SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER);
  37         assert(res == 0);
  38
  39         res = HAA_Init(0);
  40         assert(res == 0);
  41
  42         screen = SDL_SetVideoMode(0, 0, 16, SDL_SWSURFACE);
  43         assert(screen);
  44
  45         SDL_FillRect(screen, NULL,
  46                 SDL_MapRGBA(screen->format, 150, 0, 0, 255));
  47
  48         SDL_Rect dark = {350, 180, 160, 50};
  49         SDL_FillRect(screen, &dark,
  50                 SDL_MapRGBA(screen->format, 255, 0, 0, 255));
  51
  52         actor = HAA_CreateActor(SDL_SWSURFACE, 200, 200, 32);
  53         assert(actor);
  54
  55         SDL_FillRect(actor->surface, NULL,
  56                 SDL_MapRGBA(actor->surface->format, 0, 255, 0, 250));
  57
  58         SDL_Rect hole = {63, 63, 74, 74};
  59         SDL_FillRect(actor->surface, &hole,
  60                 SDL_MapRGBA(actor->surface->format, 0, 0, 255, 80));
  61
  62         HAA_SetPosition(actor, 400, 160);
  63         HAA_Show(actor);
  64
  65         SDL_TimerID timer = SDL_AddTimer(10, tick, NULL);
  66         assert(timer != NULL);
  67
  68         SDL_Event event;
  69         while (SDL_WaitEvent(&event)) {
  70                 if (HAA_FilterEvent(&event) == 0) continue;
  71                 switch (event.type) {
  72                         case SDL_QUIT:
  73                                 goto quit;
  74                         case SDL_VIDEOEXPOSE:
  75                                 res = HAA_Flip(actor);
  76                                 assert(res == 0);
  77                                 res = SDL_Flip(screen);
  78                                 assert(res == 0);
  79                                 break;
  80                         case SDL_USEREVENT:
  81                                 HAA_SetRotation(actor, HAA_Y_AXIS, degrees, 0, 0, 0);
  82                                 res = HAA_Commit(actor);
  83                                 assert(res == 0);
  84                                 break;
  85                 }
  86         }
  87
  88 quit:
  89         HAA_FreeActor(actor);
  90
  91         HAA_Quit();
  92         SDL_Quit();
  93
  94         return 0;
  95 }