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         vector<float> x, y;
  18         create_coords(0.0f-shadow.left, wd+shadow.right, border.left, border.right, slice.w-border.left-border.right, x);
  19         create_coords(0.0f-shadow.bottom, ht+shadow.top, border.bottom, border.top, slice.h-border.bottom-border.top, y);
  20
  21         vector<float> u, v;
  22         create_texcoords(slice.x, slice.x+slice.w, border.left, border.right, texture->get_width(), u);
  23         create_texcoords(slice.y, slice.y+slice.h, border.bottom, border.top, texture->get_height(), v);
  24
  25         unsigned xmin = border.left ? 0 : 1;
  26         unsigned xmax = x.size()-(border.right ? 2 : 3);
  27         unsigned ymin = border.bottom ? 0 : 1;
  28         unsigned ymax = y.size()-(border.top ? 2 : 3);
  29
  30         texture->bind();
  31         GL::Immediate imm((GL::COLOR4_UBYTE, GL::TEXCOORD2, GL::VERTEX2));
  32         imm.color(1.0f, 1.0f, 1.0f);
  33         imm.begin(GL::QUADS);
  34         for(unsigned i=ymin; i<=ymax; ++i)
  35         {
  36                 unsigned i2 = (i==0 ? 0 : i==y.size()-2 ? 2 : 1);
  37                 for(unsigned j=xmin; j<=xmax; ++j)
  38                 {
  39                         unsigned j2 = (j==0 ? 0 : j==x.size()-2 ? 2 : 1);
  40                         imm.texcoord(u[j2], v[i2]);
  41                         imm.vertex(x[j], y[i]);
  42                         imm.texcoord(u[j2+1], v[i2]);
  43                         imm.vertex(x[j+1], y[i]);
  44                         imm.texcoord(u[j2+1], v[i2+1]);
  45                         imm.vertex(x[j+1], y[i+1]);
  46                         imm.texcoord(u[j2], v[i2+1]);
  47                         imm.vertex(x[j], y[i+1]);
  48                 }
  49         }
  50         imm.end();
  51 }
  52
  53 void Graphic::create_coords(float low, float high, float brd1, float brd2, float block, vector<float> &coords) const
  54 {
  55         coords.push_back(low);
  56         coords.push_back(low+brd1);
  57         if(repeat)
  58         {
  59                 float space = high-low-brd1-brd2;
  60                 unsigned div = max(static_cast<unsigned>(space/block), 1U);
  61                 float delta = space/div;
  62                 for(unsigned i=1; i<div; ++i)
  63                         coords.push_back(low+brd1+delta*i);
  64         }
  65         coords.push_back(high-brd2);
  66         coords.push_back(high);
  67 }
  68
  69 void Graphic::create_texcoords(float low, float high, float brd1, float brd2, float scale, vector<float> &coords) const
  70 {
  71         coords.push_back(low/scale);
  72         coords.push_back((low+brd1)/scale);
  73         coords.push_back((high-brd2)/scale);
  74         coords.push_back(high/scale);
  75 }
  76
  77
  78 Graphic::Loader::Loader(Graphic &g, Resources &r):
  79         graph(g),
  80         res(r)
  81 {
  82         add("texture", &Loader::texture);
  83         add("slice",   &Loader::slice);
  84         add("border",  &Loader::border);
  85         add("repeat",  &Graphic::repeat);
  86         add("shadow",  &Loader::shadow);
  87 }
  88
  89 void Graphic::Loader::texture(const string &n)
  90 {
  91         graph.texture = res.get<GL::Texture2D>(n);
  92         graph.slice = Geometry(0, 0, graph.texture->get_width(), graph.texture->get_height());
  93 }
  94
  95 void Graphic::Loader::slice(unsigned x, unsigned y, unsigned w, unsigned h)
  96 {
  97         graph.slice = Geometry(x, y, w, h);
  98 }
  99
 100 void Graphic::Loader::border()
 101 {
 102         load_sub(graph.border);
 103 }
 104
 105 void Graphic::Loader::shadow()
 106 {
 107         load_sub(graph.shadow);
 108 }
 109
 110 } // namespace GLtk
 111 } // namespace Msp