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 : slave(slave)
  20 , blinds(0)
  21 , color(color)
  22 , duration(duration)
  23 , leadIn(0)
  24 , leadOut(0)
  25 , leadInDone(true)
  26 , fadeDone(false)
  27 , in(in)
  28 , interactive(interactive) {
  29
  30 }
  31
  32 void ColorFade::OnEnterState(SDL_Surface *screen) {
  33         if (leadIn > 0) {
  34                 timer = GraphicsTimers().StartCountdown(leadIn);
  35         } else {
  36                 timer = GraphicsTimers().StartCountdown(duration);
  37
  38         }
  39 }
  40
  41 void ColorFade::OnExitState(SDL_Surface *screen) {
  42         if (blinds) {
  43                 SDL_FreeSurface(blinds);
  44                 blinds = 0;
  45         }
  46 }
  47
  48 void ColorFade::OnResumeState(SDL_Surface *screen) {
  49         UpdateBlinds(screen->w, screen->h);
  50 }
  51
  52 void ColorFade::OnPauseState(SDL_Surface *screen) {
  53
  54 }
  55
  56
  57 void ColorFade::OnResize(int width, int height) {
  58         slave->Resize(width, height);
  59         UpdateBlinds(width, height);
  60 }
  61
  62 void ColorFade::UpdateBlinds(int width, int height) {
  63         if (blinds && blinds->w == width && blinds->h == height) return;
  64         if (blinds) {
  65                 SDL_FreeSurface(blinds);
  66         }
  67         blinds = SDL_CreateRGBSurface(0, width, height, 32, 0xFF000000, 0x00FF0000, 0x0000FF00, 0x00000000);
  68         SDL_FillRect(blinds, 0, color);
  69 }
  70
  71 Uint8 ColorFade::GetAlpha() const {
  72         if (!leadInDone) {
  73                 return in ? 255 : 0;
  74         } else if (!fadeDone) {
  75                 return (in ? timer.Remaining() : timer.Elapsed()) * 255 / duration;
  76         } else {
  77                 return in ? 0 : 255;
  78         }
  79 }
  80
  81
  82 void ColorFade::HandleEvents(const Input &input) {
  83         if (interactive) {
  84                 slave->HandleEvents(input);
  85         }
  86         if (timer.Finished()) {
  87                 if (!leadInDone) {
  88                         leadInDone = true;
  89                         timer = GraphicsTimers().StartCountdown(duration);
  90                 } else if (!fadeDone) {
  91                         fadeDone = true;
  92                         if (leadOut > 0) {
  93                                 timer = GraphicsTimers().StartCountdown(leadOut);
  94                         } else {
  95                                 Ctrl().PopState();
  96                         }
  97                 } else {
  98                         Ctrl().PopState();
  99                 }
 100         }
 101 }
 102
 103
 104 void ColorFade::UpdateWorld(float deltaT) {
 105         if (interactive) {
 106                 slave->UpdateWorld(deltaT);
 107         }
 108 }
 109
 110 void ColorFade::Render(SDL_Surface *screen) {
 111         slave->Render(screen);
 112         SDL_SetAlpha(blinds, SDL_SRCALPHA, GetAlpha());
 113         SDL_BlitSurface(blinds, 0, screen, 0);
 114 }
 115
 116 }