src/graphics/ColorFade.cpp

   1 /*
   2  * ColorFade.cpp
   3  *
   4  *  Created on: Oct 7, 2012
   5  *      Author: holy
   6  */
   7
   8 #include "ColorFade.h"
   9
  10 #include "../app/Application.h"
  11
  12 using app::Application;
  13 using app::State;
  14 using app::Input;
  15
  16 namespace graphics {
  17
  18 ColorFade::ColorFade(State *slave, Uint32 color, int duration, bool in, bool interactive)
  19 : ctrl(0)
  20 , slave(slave)
  21 , blinds(0)
  22 , color(color)
  23 , duration(duration)
  24 , in(in)
  25 , interactive(interactive) {
  26
  27 }
  28
  29 void ColorFade::EnterState(Application &c, SDL_Surface *screen) {
  30         timer = GraphicsTimers().StartCountdown(duration);
  31         ctrl = &c;
  32 }
  33
  34 void ColorFade::ExitState(Application &, SDL_Surface *screen) {
  35         if (blinds) {
  36                 SDL_FreeSurface(blinds);
  37                 blinds = 0;
  38         }
  39 }
  40
  41 void ColorFade::ResumeState(Application &ctrl, SDL_Surface *screen) {
  42         UpdateBlinds(screen->w, screen->h);
  43 }
  44
  45 void ColorFade::PauseState(Application &ctrl, SDL_Surface *screen) {
  46
  47 }
  48
  49
  50 void ColorFade::Resize(int width, int height) {
  51         slave->Resize(width, height);
  52         UpdateBlinds(width, height);
  53 }
  54
  55 void ColorFade::UpdateBlinds(int width, int height) {
  56         if (blinds && blinds->w == width && blinds->h == height) return;
  57         if (blinds) {
  58                 SDL_FreeSurface(blinds);
  59         }
  60         blinds = SDL_CreateRGBSurface(0, width, height, 32, 0xFF000000, 0x00FF0000, 0x0000FF00, 0x00000000);
  61         SDL_FillRect(blinds, 0, color);
  62 }
  63
  64 Uint8 ColorFade::GetAlpha() const {
  65         if (in) {
  66                 return timer.Remaining() * 255 / duration;
  67         } else {
  68                 return timer.Elapsed() * 255 / duration;
  69         }
  70 }
  71
  72
  73 void ColorFade::HandleEvents(const Input &input) {
  74         if (interactive) {
  75                 slave->HandleEvents(input);
  76         }
  77         if (timer.Finished()) {
  78                 ctrl->PopState();
  79         }
  80 }
  81
  82
  83 void ColorFade::UpdateWorld(float deltaT) {
  84         if (interactive) {
  85                 slave->UpdateWorld(deltaT);
  86         }
  87 }
  88
  89 void ColorFade::Render(SDL_Surface *screen) {
  90         slave->Render(screen);
  91         SDL_SetAlpha(blinds, SDL_SRCALPHA, GetAlpha());
  92         SDL_BlitSurface(blinds, 0, screen, 0);
  93 }
  94
  95 }