source/graphic.cpp

   1 #include "graphic.h"
   2 #include "resources.h"
   3
   4 using namespace std;
   5
   6 #include <iostream>
   7
   8 namespace Msp {
   9 namespace GLtk {
  10
  11 Graphic::Graphic(const Resources &r, const string &n):
  12         res(r),
  13         name(n),
  14         texture(0)
  15 { }
  16
  17 void Graphic::render(unsigned wd, unsigned ht) const
  18 {
  19         float x[4];
  20         float y[4];
  21         float u[4];
  22         float v[4];
  23
  24         x[0]=0.0f-shadow.left;
  25         x[1]=x[0]+border.left;
  26         x[3]=wd+shadow.right;
  27         x[2]=x[3]-border.right;
  28
  29         y[0]=0.0f-shadow.bottom;
  30         y[1]=y[0]+border.bottom;
  31         y[3]=ht+shadow.top;
  32         y[2]=y[3]-border.top;
  33
  34         const unsigned twidth=texture->get_width();
  35         u[0]=static_cast<float>(slice.x)/twidth;
  36         u[1]=static_cast<float>(slice.x+border.left)/twidth;
  37         u[2]=static_cast<float>(slice.x+slice.w-border.right)/twidth;
  38         u[3]=static_cast<float>(slice.x+slice.w)/twidth;
  39
  40         const unsigned theight=texture->get_height();
  41         v[0]=static_cast<float>(slice.y)/theight;
  42         v[1]=static_cast<float>(slice.y+border.bottom)/theight;
  43         v[2]=static_cast<float>(slice.y+slice.h-border.top)/theight;
  44         v[3]=static_cast<float>(slice.y+slice.h)/theight;
  45
  46         texture->bind();
  47         unsigned xmin=border.left ? 0 : 1;
  48         unsigned xmax=border.right ? 3 : 2;
  49         unsigned ymin=border.bottom ? 0 : 1;
  50         unsigned ymax=border.top ? 3 : 2;
  51
  52         for(unsigned i=ymin; i<ymax; ++i)
  53         {
  54                 glBegin(GL_QUAD_STRIP);
  55                 for(unsigned j=xmin; j<=xmax; ++j)
  56                 {
  57                         glTexCoord2f(u[j], v[i]);
  58                         glVertex2f(x[j], y[i]);
  59                         glTexCoord2f(u[j], v[i+1]);
  60                         glVertex2f(x[j], y[i+1]);
  61                 }
  62                 glEnd();
  63         }
  64 }
  65
  66
  67 Graphic::Loader::Loader(Graphic &g):
  68         graph(g)
  69 {
  70         add("texture", &Loader::texture);
  71         add("slice",   &Loader::slice);
  72         add("border",  &Loader::border);
  73         add("shadow",  &Loader::shadow);
  74 }
  75
  76 void Graphic::Loader::texture(const string &n)
  77 {
  78         graph.texture=&graph.res.get_texture(n);
  79         graph.slice=Geometry(0, 0, graph.texture->get_width(), graph.texture->get_height());
  80 }
  81
  82 void Graphic::Loader::slice(unsigned x, unsigned y, unsigned w, unsigned h)
  83 {
  84         graph.slice=Geometry(x, y, w, h);
  85 }
  86
  87 void Graphic::Loader::border()
  88 {
  89         load_sub(graph.border);
  90 }
  91
  92 void Graphic::Loader::shadow()
  93 {
  94         load_sub(graph.shadow);
  95 }
  96
  97 } // namespace GLtk
  98 } // namespace Msp