source/graphic.cpp

   1 #include "graphic.h"
   2 #include "resources.h"
   3
   4 using namespace std;
   5
   6 namespace Msp {
   7 namespace GLtk {
   8
   9 Graphic::Graphic():
  10         texture(0),
  11         repeat(false)
  12 { }
  13
  14 void Graphic::build(unsigned wd, unsigned ht, GL::PrimitiveBuilder &bld) const
  15 {
  16         vector<float> x, y;
  17         create_coords(0.0f-shadow.left, wd+shadow.right, border.left, border.right, slice.w-border.left-border.right, x);
  18         create_coords(0.0f-shadow.bottom, ht+shadow.top, border.bottom, border.top, slice.h-border.bottom-border.top, y);
  19
  20         vector<float> u, v;
  21         create_texcoords(slice.x, slice.x+slice.w, border.left, border.right, texture->get_width(), u);
  22         create_texcoords(slice.y, slice.y+slice.h, border.bottom, border.top, texture->get_height(), v);
  23
  24         unsigned xmin = border.left ? 0 : 1;
  25         unsigned xmax = x.size()-(border.right ? 2 : 3);
  26         unsigned ymin = border.bottom ? 0 : 1;
  27         unsigned ymax = y.size()-(border.top ? 2 : 3);
  28
  29         bld.color(1.0f, 1.0f, 1.0f);
  30         for(unsigned i=ymin; i<=ymax; ++i)
  31         {
  32                 unsigned i2 = (i==0 ? 0 : i==y.size()-2 ? 2 : 1);
  33                 for(unsigned j=xmin; j<=xmax; ++j)
  34                 {
  35                         unsigned j2 = (j==0 ? 0 : j==x.size()-2 ? 2 : 1);
  36                         if(j==xmin || (j>1 && j<x.size()-2))
  37                         {
  38                                 if(j>xmin)
  39                                         bld.end();
  40                                 bld.begin(GL::TRIANGLE_STRIP);
  41                                 bld.texcoord(u[j2], v[i2+1]);
  42                                 bld.vertex(x[j], y[i+1]);
  43                                 bld.texcoord(u[j2], v[i2]);
  44                                 bld.vertex(x[j], y[i]);
  45                         }
  46                         bld.texcoord(u[j2+1], v[i2+1]);
  47                         bld.vertex(x[j+1], y[i+1]);
  48                         bld.texcoord(u[j2+1], v[i2]);
  49                         bld.vertex(x[j+1], y[i]);
  50                 }
  51                 bld.end();
  52         }
  53 }
  54
  55 void Graphic::create_coords(float low, float high, float brd1, float brd2, float block, vector<float> &coords) const
  56 {
  57         coords.push_back(low);
  58         coords.push_back(low+brd1);
  59         if(repeat)
  60         {
  61                 float space = high-low-brd1-brd2;
  62                 unsigned div = max(static_cast<unsigned>(space/block), 1U);
  63                 float delta = space/div;
  64                 for(unsigned i=1; i<div; ++i)
  65                         coords.push_back(low+brd1+delta*i);
  66         }
  67         coords.push_back(high-brd2);
  68         coords.push_back(high);
  69 }
  70
  71 void Graphic::create_texcoords(float low, float high, float brd1, float brd2, float scale, vector<float> &coords) const
  72 {
  73         coords.push_back(low/scale);
  74         coords.push_back((low+brd1)/scale);
  75         coords.push_back((high-brd2)/scale);
  76         coords.push_back(high/scale);
  77 }
  78
  79
  80 Graphic::Loader::Loader(Graphic &g, Resources &r):
  81         DataFile::CollectionObjectLoader<Graphic, Resources>(g, &r)
  82 {
  83         add("texture", &Loader::texture);
  84         add("slice",   &Loader::slice);
  85         add("border",  &Loader::border);
  86         add("repeat",  &Graphic::repeat);
  87         add("shadow",  &Loader::shadow);
  88 }
  89
  90 void Graphic::Loader::texture(const string &n)
  91 {
  92         obj.texture = &get_collection().get<GL::Texture2D>(n);
  93         obj.slice = Geometry(0, 0, obj.texture->get_width(), obj.texture->get_height());
  94 }
  95
  96 void Graphic::Loader::slice(unsigned x, unsigned y, unsigned w, unsigned h)
  97 {
  98         obj.slice = Geometry(x, y, w, h);
  99 }
 100
 101 void Graphic::Loader::border()
 102 {
 103         load_sub(obj.border);
 104 }
 105
 106 void Graphic::Loader::shadow()
 107 {
 108         load_sub(obj.shadow);
 109 }
 110
 111 } // namespace GLtk
 112 } // namespace Msp