src/graphics/Gauge.cpp

   1 /*
   2  * Gauge.cpp
   3  *
   4  *  Created on: Aug 7, 2012
   5  *      Author: holy
   6  */
   7
   8 #include "Gauge.h"
   9
  10 using geometry::Point;
  11
  12 namespace graphics {
  13
  14 void Gauge::Draw(SDL_Surface *dest, Point<int> position, int width, Uint8 fill) const {
  15         SDL_Rect srcRect, destRect;
  16
  17         int filledWidth = fill * (width - startWidth - endWidth) / 255;
  18         int emptyWidth = (255 - fill) * (width - startWidth - endWidth) / 255;
  19
  20         // start
  21         srcRect.w = startWidth;
  22         srcRect.h = height;
  23         destRect.x = position.X();
  24         destRect.y = position.Y();
  25         // full part
  26         if (fill == 0) {
  27                 srcRect.x = emptyX;
  28                 srcRect.y = emptyY;
  29                 SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  30         } else {
  31                 srcRect.x = fullX;
  32                 srcRect.y = fullY;
  33                 SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  34         }
  35
  36         destRect.x = position.X() + startWidth;
  37
  38         // fill
  39         srcRect.x = fullX + startWidth;
  40         srcRect.y = fullY;
  41         srcRect.w = repeatWidth;
  42         while (filledWidth > repeatWidth) {
  43                 SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  44                 destRect.x += repeatWidth;
  45                 filledWidth -= repeatWidth;
  46         }
  47         srcRect.x = emptyX + startWidth;
  48         srcRect.y = emptyY;
  49         while (emptyWidth > repeatWidth) {
  50                 SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  51                 destRect.x += repeatWidth;
  52                 emptyWidth -= repeatWidth;
  53         }
  54
  55         // end
  56         srcRect.w = endWidth;
  57         if (fill == 255) {
  58                 srcRect.x = fullX + startWidth + repeatWidth;
  59                 srcRect.y = fullY;
  60                 SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  61         } else {
  62                 srcRect.x = emptyX + startWidth + repeatWidth;
  63                 srcRect.y = emptyY;
  64                 SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  65         }
  66
  67 }
  68
  69 }