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