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         repeat(false)
  13 { }
  14
  15 void Graphic::render(unsigned wd, unsigned ht) const
  16 {
  17         GL::VertexArray varr((GL::TEXCOORD2, GL::VERTEX2));
  18         RefPtr<GL::VertexArrayBuilder> vab=varr.modify();
  19
  20         vector<float> x, y;
  21         create_coords(0.0f-shadow.left, wd+shadow.right, border.left, border.right, slice.w-border.left-border.right, x);
  22         create_coords(0.0f-shadow.bottom, ht+shadow.top, border.bottom, border.top, slice.h-border.bottom-border.top, y);
  23
  24         vector<float> u, v;
  25         create_texcoords(slice.x, slice.x+slice.w, border.left, border.right, texture->get_width(), u);
  26         create_texcoords(slice.y, slice.y+slice.h, border.bottom, border.top, texture->get_height(), v);
  27
  28         unsigned xmin=border.left ? 0 : 1;
  29         unsigned xmax=x.size()-(border.right ? 2 : 3);
  30         unsigned ymin=border.bottom ? 0 : 1;
  31         unsigned ymax=y.size()-(border.top ? 2 : 3);
  32
  33         texture->bind();
  34         GL::Immediate imm((GL::TEXCOORD2,GL::VERTEX2));
  35         imm.begin(GL::QUADS);
  36         for(unsigned i=ymin; i<=ymax; ++i)
  37         {
  38                 unsigned i2=(i==0 ? 0 : i==y.size()-2 ? 2 : 1);
  39                 for(unsigned j=xmin; j<=xmax; ++j)
  40                 {
  41                         unsigned j2=(j==0 ? 0 : j==x.size()-2 ? 2 : 1);
  42                         imm.texcoord(u[j2], v[i2]);
  43                         imm.vertex(x[j], y[i]);
  44                         imm.texcoord(u[j2+1], v[i2]);
  45                         imm.vertex(x[j+1], y[i]);
  46                         imm.texcoord(u[j2+1], v[i2+1]);
  47                         imm.vertex(x[j+1], y[i+1]);
  48                         imm.texcoord(u[j2], v[i2+1]);
  49                         imm.vertex(x[j], y[i+1]);
  50                 }
  51         }
  52         imm.end();
  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         graph(g),
  82         res(r)
  83 {
  84         add("texture", &Loader::texture);
  85         add("slice",   &Loader::slice);
  86         add("border",  &Loader::border);
  87         add("repeat",  &Graphic::repeat);
  88         add("shadow",  &Loader::shadow);
  89 }
  90
  91 void Graphic::Loader::texture(const string &n)
  92 {
  93         graph.texture=res.get<GL::Texture2D>(n);
  94         graph.slice=Geometry(0, 0, graph.texture->get_width(), graph.texture->get_height());
  95 }
  96
  97 void Graphic::Loader::slice(unsigned x, unsigned y, unsigned w, unsigned h)
  98 {
  99         graph.slice=Geometry(x, y, w, h);
 100 }
 101
 102 void Graphic::Loader::border()
 103 {
 104         load_sub(graph.border);
 105 }
 106
 107 void Graphic::Loader::shadow()
 108 {
 109         load_sub(graph.shadow);
 110 }
 111
 112 } // namespace GLtk
 113 } // namespace Msp