src/graphics/Texture.cpp

   1 /*
   2  * Texture.cpp
   3  *
   4  *  Created on: Oct 21, 2012
   5  *      Author: holy
   6  */
   7
   8 #include "Texture.h"
   9
  10 #include "../sdl/utility.h"
  11
  12 using geometry::Vector;
  13
  14 namespace graphics {
  15
  16 Texture::Texture(
  17                 SDL_Surface *surface,
  18                 const Vector<int> &size,
  19                 const Vector<int> &offset)
  20 : surface(surface)
  21 , size(size)
  22 , offset(offset) {
  23
  24 }
  25
  26 Texture::~Texture() {
  27
  28 }
  29
  30
  31 void Texture::Render(SDL_Surface *dest, const Vector<int> &from, const Vector<int> &to) const {
  32         SDL_Rect destRect;
  33         destRect.x = from.X();
  34         destRect.y = from.Y();
  35         if (!surface || size == Vector<int>()) {
  36                 destRect.w = to.X() - from.X();
  37                 destRect.h = to.Y() - from.Y();
  38                 SDL_FillRect(dest, &destRect, SDL_MapRGB(dest->format, 0xFF, 0x00, 0x00));
  39                 return;
  40         }
  41
  42         SDL_Rect srcRect;
  43         srcRect.x = offset.X();
  44         srcRect.y = offset.Y();
  45
  46         for (destRect.y = from.Y(); destRect.y < to.Y(); destRect.y += size.Y()) {
  47                 srcRect.h = size.Y();
  48                 destRect.h = size.Y();
  49                 if (destRect.y + destRect.h > to.Y()) {
  50                         srcRect.h = to.Y() - destRect.y;
  51                         destRect.h = to.Y() - destRect.y;
  52                 }
  53                 for (destRect.x = from.X(); destRect.x < to.X(); destRect.x += size.X()) {
  54                         srcRect.w = size.X();
  55                         destRect.w = size.X();
  56                         if (destRect.x + destRect.w > to.X()) {
  57                                 srcRect.w = to.X() - destRect.x;
  58                                 destRect.w = to.X() - destRect.x;
  59                         }
  60                         SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  61                 }
  62         }
  63 }
  64
  65 }