src/background.cpp

   1 #include "background.h"
   2
   3 #include "globals.h"
   4 #include "viewport.h"
   5 #include "display_manager.h"
   6
   7 Background::Background(DisplayManager& displaymanager)
   8 {
   9   displaymanager.add_drawable(this, LAYER_BACKGROUND0);
  10 }
  11
  12 Background::~Background()
  13 {
  14 }
  15
  16 void
  17 Background::action(float)
  18 {
  19 }
  20
  21 void
  22 Background::set_image(Surface* image, float speed)
  23 {
  24   bgtype = BACKGROUND_IMAGE;
  25   this->image = image;
  26   this->speed = speed;
  27 }
  28
  29 void
  30 Background::set_gradient(Color top, Color bottom)
  31 {
  32   bgtype = BACKGROUND_GRADIENT;
  33   gradient_top = top;
  34   gradient_bottom = bottom;
  35 }
  36
  37 void
  38 Background::draw(ViewPort& viewport, int )
  39 {
  40   if(bgtype == BACKGROUND_GRADIENT) {
  41     drawgradient(gradient_top, gradient_bottom);
  42   } else if(bgtype == BACKGROUND_IMAGE) {
  43     int sx = int(-viewport.get_translation().x * float(speed/100.))
  44       % image->w - image->w;
  45     int sy = int(-viewport.get_translation().y * float(speed/100.))
  46       % image->h - image->h;
  47     for(int x = sx; x < screen->w; x += image->w)
  48       for(int y = sy; y < screen->h; y += image->h)
  49         image->draw(x, y);
  50   }
  51 }
  52