source/graphic.cpp

   1 #include <msp/gl/immediate.h>
   2 #include "graphic.h"
   3 #include "resources.h"
   4
   5 using namespace std;
   6
   7 namespace Msp {
   8 namespace GLtk {
   9
  10 Graphic::Graphic():
  11         texture(0)
  12 { }
  13
  14 void Graphic::render(unsigned wd, unsigned ht) const
  15 {
  16         float x[4];
  17         float y[4];
  18         float u[4];
  19         float v[4];
  20
  21         x[0]=0.0f-shadow.left;
  22         x[1]=x[0]+border.left;
  23         x[3]=wd+shadow.right;
  24         x[2]=x[3]-border.right;
  25
  26         y[0]=0.0f-shadow.bottom;
  27         y[1]=y[0]+border.bottom;
  28         y[3]=ht+shadow.top;
  29         y[2]=y[3]-border.top;
  30
  31         const unsigned twidth=texture->get_width();
  32         u[0]=static_cast<float>(slice.x)/twidth;
  33         u[1]=static_cast<float>(slice.x+border.left)/twidth;
  34         u[2]=static_cast<float>(slice.x+slice.w-border.right)/twidth;
  35         u[3]=static_cast<float>(slice.x+slice.w)/twidth;
  36
  37         const unsigned theight=texture->get_height();
  38         v[0]=static_cast<float>(slice.y)/theight;
  39         v[1]=static_cast<float>(slice.y+border.bottom)/theight;
  40         v[2]=static_cast<float>(slice.y+slice.h-border.top)/theight;
  41         v[3]=static_cast<float>(slice.y+slice.h)/theight;
  42
  43         texture->bind();
  44         unsigned xmin=border.left ? 0 : 1;
  45         unsigned xmax=border.right ? 3 : 2;
  46         unsigned ymin=border.bottom ? 0 : 1;
  47         unsigned ymax=border.top ? 3 : 2;
  48
  49         GL::Immediate imm((GL::TEXCOORD2,GL::VERTEX2));
  50         for(unsigned i=ymin; i<ymax; ++i)
  51         {
  52                 imm.begin(GL::QUAD_STRIP);
  53                 for(unsigned j=xmin; j<=xmax; ++j)
  54                 {
  55                         imm.texcoord(u[j], v[i]);
  56                         imm.vertex(x[j], y[i]);
  57                         imm.texcoord(u[j], v[i+1]);
  58                         imm.vertex(x[j], y[i+1]);
  59                 }
  60                 imm.end();
  61         }
  62 }
  63
  64
  65 Graphic::Loader::Loader(Graphic &g, Resources &r):
  66         graph(g),
  67         res(r)
  68 {
  69         add("texture", &Loader::texture);
  70         add("slice",   &Loader::slice);
  71         add("border",  &Loader::border);
  72         add("shadow",  &Loader::shadow);
  73 }
  74
  75 void Graphic::Loader::texture(const string &n)
  76 {
  77         graph.texture=res.get<GL::Texture2D>(n);
  78         graph.slice=Geometry(0, 0, graph.texture->get_width(), graph.texture->get_height());
  79 }
  80
  81 void Graphic::Loader::slice(unsigned x, unsigned y, unsigned w, unsigned h)
  82 {
  83         graph.slice=Geometry(x, y, w, h);
  84 }
  85
  86 void Graphic::Loader::border()
  87 {
  88         load_sub(graph.border);
  89 }
  90
  91 void Graphic::Loader::shadow()
  92 {
  93         load_sub(graph.shadow);
  94 }
  95
  96 } // namespace GLtk
  97 } // namespace Msp