diff options
| -rw-r--r-- | effect-pad.c | 110 |
1 files changed, 101 insertions, 9 deletions
diff --git a/effect-pad.c b/effect-pad.c index 05a1dc9..0876b89 100644 --- a/effect-pad.c +++ b/effect-pad.c @@ -44,7 +44,8 @@ static SDL_Surface *screen; enum Effects { EFFECT_FIRE, - EFFECT_BLOPS + EFFECT_BLOPS, + EFFECT_ERASOR }; static enum Effects currentEffect = EFFECT_FIRE; @@ -411,6 +412,63 @@ effect_video_change(const char *file, SDL_Color *key) libvlc_media_player_play(effect_video_ctx.mp); } +static SDL_Surface *effect_erasor_surface, *effect_erasor_applysurf; + +static inline void +effect_erasor_init(void) +{ + effect_erasor_surface = SDL_CreateRGBSurface(SDL_SWSURFACE | SDL_SRCALPHA, + screen->w, screen->h, 16, + 0x0003, 0x000C, 0x0030, 0xFF00); + + effect_erasor_applysurf = SDL_CreateRGBSurface(SDL_HWSURFACE | SDL_SRCALPHA, + screen->w, screen->h, 32, + 0x000000FF, 0x0000FF00, + 0x00FF0000, 0xFF000000); +} + +static inline void +effect_erasor_draw(int x, int y, Uint8 intensity) +{ + filledCircleRGBA(effect_erasor_surface, x, y, 5, + 0, 0, 0, intensity); + +} + +static void +effect_erasor_apply(void) +{ + SDL_MAYBE_LOCK(effect_erasor_surface); + SDL_MAYBE_LOCK(effect_erasor_applysurf); + + for (int i = 0; i < effect_erasor_surface->w*effect_erasor_surface->h; i++) { + Uint8 erasor_alpha; + SDL_Color dst_color; + + SDL_GetRGBA(((Uint16 *)effect_erasor_surface->pixels)[i], + effect_erasor_surface->format, + &dst_color.r, &dst_color.g, + &dst_color.b, &erasor_alpha); + SDL_GetRGBA(((Uint32 *)effect_erasor_applysurf->pixels)[i], + effect_erasor_applysurf->format, + &dst_color.r, &dst_color.g, + &dst_color.b, &dst_color.unused); + + if (dst_color.unused > erasor_alpha) + dst_color.unused -= erasor_alpha; + else + dst_color.unused = 0; + + ((Uint32 *)effect_erasor_applysurf->pixels)[i] = + SDL_MapRGBA(effect_erasor_applysurf->format, + dst_color.r, dst_color.g, + dst_color.b, dst_color.unused); + } + + SDL_MAYBE_UNLOCK(effect_erasor_applysurf); + SDL_MAYBE_UNLOCK(effect_erasor_surface); +} + static SDL_Color effect_bg_color = {0, 0, 0}; static inline void @@ -566,6 +624,9 @@ process_events(void) case SDLK_b: currentEffect = EFFECT_BLOPS; break; + case SDLK_e: + currentEffect = EFFECT_ERASOR; + break; default: break; @@ -574,19 +635,37 @@ process_events(void) break; case SDL_MOUSEBUTTONDOWN: - if (currentEffect == EFFECT_BLOPS) + switch (currentEffect) { + case EFFECT_BLOPS: effect_blops_create(event.button.x, event.button.y, event.button.button == SDL_BUTTON_LEFT ? effect_generic_color : effect_generic_get_next_color()); + break; + case EFFECT_ERASOR: + effect_erasor_draw(event.button.x, event.button.y, 128); + break; + default: + break; + } break; + case SDL_MOUSEMOTION: - if ((event.motion.state & (SDL_BUTTON(1) | SDL_BUTTON(3))) && - currentEffect == EFFECT_BLOPS) - effect_blops_create(event.motion.x, event.motion.y, - event.motion.state & SDL_BUTTON(1) - ? effect_generic_color - : effect_generic_get_next_color()); + switch (currentEffect) { + case EFFECT_BLOPS: + if (event.motion.state & (SDL_BUTTON(1) | SDL_BUTTON(3))) + effect_blops_create(event.motion.x, event.motion.y, + event.motion.state & SDL_BUTTON(1) + ? effect_generic_color + : effect_generic_get_next_color()); + break; + case EFFECT_ERASOR: + if (event.motion.state & SDL_BUTTON(1)) + effect_erasor_draw(event.motion.x, event.motion.y, 128); + break; + default: + break; + } break; case SDL_QUIT: @@ -626,6 +705,7 @@ main(int argc, char **argv) effect_generic_init(); effect_video_init(); fire_surface = effect_fire_init(); + effect_erasor_init(); for (;;) { process_events(); @@ -642,9 +722,21 @@ main(int argc, char **argv) SDL_UnlockMutex(effect_video_ctx.mutex); } - if (image_surface != NULL) + if (image_surface != NULL) { +#if 0 + SDL_FillRect(effect_erasor_applysurf, NULL, + SDL_MapRGBA(effect_erasor_applysurf->format, + 0, 0, 0, SDL_ALPHA_OPAQUE)); +#endif + SDL_BlitSurface(image_surface, NULL, screen, NULL); +#if 0 + effect_erasor_apply(); + SDL_BlitSurface(effect_erasor_applysurf, NULL, screen, NULL); +#endif + } + effect_fire_update(fire_surface); SDL_BlitSurface(fire_surface, NULL, screen, NULL); |