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::Vector;
  11
  12 namespace graphics {
  13
  14 void Gauge::Draw(SDL_Surface *dest, const Vector<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         if (!surface) {
  21                 destRect.x = position.X();
  22                 destRect.y = position.Y();
  23                 destRect.w = filledWidth + startWidth;
  24                 destRect.h = height;
  25                 SDL_FillRect(dest, &destRect, SDL_MapRGB(dest->format, 0x00, 0xFF, 0x00));
  26                 destRect.x += destRect.w;
  27                 destRect.w = emptyWidth + endWidth;
  28                 SDL_FillRect(dest, &destRect, SDL_MapRGB(dest->format, 0xFF, 0x00, 0x00));
  29                 return;
  30         }
  31
  32         // start
  33         srcRect.w = startWidth;
  34         srcRect.h = height;
  35         destRect.x = position.X();
  36         destRect.y = position.Y();
  37         // full part
  38         if (fill == 0) {
  39                 srcRect.x = emptyOffset.X();
  40                 srcRect.y = emptyOffset.Y();
  41                 SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  42         } else {
  43                 srcRect.x = fullOffset.X();
  44                 srcRect.y = fullOffset.Y();
  45                 SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  46         }
  47
  48         destRect.x = position.X() + startWidth;
  49
  50         // fill
  51         srcRect.x = fullOffset.X() + startWidth;
  52         srcRect.y = fullOffset.Y();
  53         srcRect.w = repeatWidth;
  54         while (filledWidth > repeatWidth) {
  55                 SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  56                 destRect.x += repeatWidth;
  57                 filledWidth -= repeatWidth;
  58         }
  59         srcRect.x = emptyOffset.X() + startWidth;
  60         srcRect.y = emptyOffset.Y();
  61         while (emptyWidth > repeatWidth) {
  62                 SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  63                 destRect.x += repeatWidth;
  64                 emptyWidth -= repeatWidth;
  65         }
  66
  67         // end
  68         srcRect.w = endWidth;
  69         if (fill == 255) {
  70                 srcRect.x = fullOffset.X() + startWidth + repeatWidth;
  71                 srcRect.y = fullOffset.Y();
  72                 SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  73         } else {
  74                 srcRect.x = emptyOffset.X() + startWidth + repeatWidth;
  75                 srcRect.y = emptyOffset.Y();
  76                 SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  77         }
  78
  79 }
  80
  81 }