src/graphics/Texture.cpp

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