src/graphics/Texture.cpp

   1 #include "Texture.h"
   2
   3 #include "../loader/Interpreter.h"
   4 #include "../loader/TypeDescription.h"
   5 #include "../sdl/utility.h"
   6
   7 using math::Vector;
   8 using loader::FieldDescription;
   9 using loader::Interpreter;
  10 using loader::TypeDescription;
  11
  12 namespace graphics {
  13
  14 Texture::Texture(
  15                 SDL_Surface *surface,
  16                 const Vector<int> &size,
  17                 const Vector<int> &offset)
  18 : surface(surface)
  19 , size(size)
  20 , offset(offset) {
  21
  22 }
  23
  24 Texture::~Texture() {
  25
  26 }
  27
  28
  29 void Texture::Render(SDL_Surface *dest, const Vector<int> &from, const Vector<int> &to) const {
  30         SDL_Rect destRect;
  31         destRect.x = from.X();
  32         destRect.y = from.Y();
  33         if (!surface || size == Vector<int>()) {
  34                 destRect.w = to.X() - from.X();
  35                 destRect.h = to.Y() - from.Y();
  36                 SDL_FillRect(dest, &destRect, SDL_MapRGB(dest->format, 0xFF, 0x00, 0x00));
  37                 return;
  38         }
  39
  40         SDL_Rect srcRect;
  41         srcRect.x = offset.X();
  42         srcRect.y = offset.Y();
  43         srcRect.h = size.Y();
  44         srcRect.w = size.X();
  45
  46         const Vector<int> total = to - from;
  47         const Vector<int> over = total % size;
  48         const Vector<int> target = from + (total - over);
  49
  50         for (destRect.y = from.Y(); destRect.y < target.Y(); destRect.y += size.Y()) {
  51                 for (destRect.x = from.X(); destRect.x < target.X(); destRect.x += size.X()) {
  52                         SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  53                 }
  54         }
  55         if (over.X() > 0) {
  56                 destRect.x = target.X();
  57                 srcRect.w = over.X();
  58                 srcRect.h = size.Y();
  59                 for (destRect.y = from.Y(); destRect.y < target.Y(); destRect.y += size.Y()) {
  60                         SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  61                 }
  62         }
  63         if (over.Y() > 0) {
  64                 destRect.y = target.Y();
  65                 srcRect.w = size.X();
  66                 srcRect.h = over.Y();
  67                 for (destRect.x = from.X(); destRect.x < target.X(); destRect.x += size.X()) {
  68                         SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  69                 }
  70                 if (over.X() > 0) {
  71                         srcRect.w = over.X();
  72                         srcRect.h = over.Y();
  73                         destRect.x = target.X();
  74                         destRect.y = target.Y();
  75                         SDL_BlitSurface(surface, &srcRect, dest, &destRect);
  76                 }
  77         }
  78 }
  79
  80
  81 void Texture::CreateTypeDescription() {
  82         Texture t;
  83
  84         TypeDescription &td(TypeDescription::Create(TYPE_ID, "Texture"));
  85         td.SetConstructor(&Construct);
  86         td.SetSize(sizeof(Texture));
  87
  88         td.AddField("image", FieldDescription(((char *)&t.surface) - ((char *)&t), Interpreter::IMAGE_ID).SetReferenced().SetDescription("image containing the texture"));
  89         td.AddField("size", FieldDescription(((char *)&t.size) - ((char *)&t), Interpreter::VECTOR_ID).SetDescription("offset into the image in pixels"));
  90         td.AddField("offset", FieldDescription(((char *)&t.offset) - ((char *)&t), Interpreter::VECTOR_ID).SetDescription("size of the texture in pixels"));
  91 }
  92
  93 void Texture::Construct(void *data) {
  94         new (data) Texture;
  95 }
  96
  97 }