source/graphic.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgltk
   4 Copyright © 2007  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <msp/gl/immediate.h>
   9 #include "graphic.h"
  10 #include "resources.h"
  11
  12 using namespace std;
  13
  14 namespace Msp {
  15 namespace GLtk {
  16
  17 Graphic::Graphic():
  18         texture(0),
  19         repeat(false)
  20 { }
  21
  22 void Graphic::render(unsigned wd, unsigned ht) const
  23 {
  24         GL::VertexArray varr((GL::TEXCOORD2, GL::VERTEX2));
  25         RefPtr<GL::VertexArrayBuilder> vab=varr.modify();
  26
  27         vector<float> x, y;
  28         create_coords(0.0f-shadow.left, wd+shadow.right, border.left, border.right, slice.w-border.left-border.right, x);
  29         create_coords(0.0f-shadow.bottom, ht+shadow.top, border.bottom, border.top, slice.h-border.bottom-border.top, y);
  30
  31         vector<float> u, v;
  32         create_texcoords(slice.x, slice.x+slice.w, border.left, border.right, texture->get_width(), u);
  33         create_texcoords(slice.y, slice.y+slice.h, border.bottom, border.top, texture->get_height(), v);
  34
  35         unsigned xmin=border.left ? 0 : 1;
  36         unsigned xmax=x.size()-(border.right ? 2 : 3);
  37         unsigned ymin=border.bottom ? 0 : 1;
  38         unsigned ymax=y.size()-(border.top ? 2 : 3);
  39
  40         texture->bind();
  41         GL::Immediate imm((GL::TEXCOORD2,GL::VERTEX2));
  42         imm.begin(GL::QUADS);
  43         for(unsigned i=ymin; i<=ymax; ++i)
  44         {
  45                 unsigned i2=(i==0 ? 0 : i==y.size()-2 ? 2 : 1);
  46                 for(unsigned j=xmin; j<=xmax; ++j)
  47                 {
  48                         unsigned j2=(j==0 ? 0 : j==x.size()-2 ? 2 : 1);
  49                         imm.texcoord(u[j2], v[i2]);
  50                         imm.vertex(x[j], y[i]);
  51                         imm.texcoord(u[j2+1], v[i2]);
  52                         imm.vertex(x[j+1], y[i]);
  53                         imm.texcoord(u[j2+1], v[i2+1]);
  54                         imm.vertex(x[j+1], y[i+1]);
  55                         imm.texcoord(u[j2], v[i2+1]);
  56                         imm.vertex(x[j], y[i+1]);
  57                 }
  58         }
  59         imm.end();
  60 }
  61
  62 void Graphic::create_coords(float low, float high, float brd1, float brd2, float block, vector<float> &coords) const
  63 {
  64         coords.push_back(low);
  65         coords.push_back(low+brd1);
  66         if(repeat)
  67         {
  68                 float space=high-low-brd1-brd2;
  69                 unsigned div=max(static_cast<unsigned>(space/block), 1U);
  70                 float delta=space/div;
  71                 for(unsigned i=1; i<div; ++i)
  72                         coords.push_back(low+brd1+delta*i);
  73         }
  74         coords.push_back(high-brd2);
  75         coords.push_back(high);
  76 }
  77
  78 void Graphic::create_texcoords(float low, float high, float brd1, float brd2, float scale, vector<float> &coords) const
  79 {
  80         coords.push_back(low/scale);
  81         coords.push_back((low+brd1)/scale);
  82         coords.push_back((high-brd2)/scale);
  83         coords.push_back(high/scale);
  84 }
  85
  86
  87 Graphic::Loader::Loader(Graphic &g, Resources &r):
  88         graph(g),
  89         res(r)
  90 {
  91         add("texture", &Loader::texture);
  92         add("slice",   &Loader::slice);
  93         add("border",  &Loader::border);
  94         add("repeat",  &Graphic::repeat);
  95         add("shadow",  &Loader::shadow);
  96 }
  97
  98 void Graphic::Loader::texture(const string &n)
  99 {
 100         graph.texture=res.get<GL::Texture2D>(n);
 101         graph.slice=Geometry(0, 0, graph.texture->get_width(), graph.texture->get_height());
 102 }
 103
 104 void Graphic::Loader::slice(unsigned x, unsigned y, unsigned w, unsigned h)
 105 {
 106         graph.slice=Geometry(x, y, w, h);
 107 }
 108
 109 void Graphic::Loader::border()
 110 {
 111         load_sub(graph.border);
 112 }
 113
 114 void Graphic::Loader::shadow()
 115 {
 116         load_sub(graph.shadow);
 117 }
 118
 119 } // namespace GLtk
 120 } // namespace Msp