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         vector<float> x, y;
  25         create_coords(0.0f-shadow.left, wd+shadow.right, border.left, border.right, slice.w-border.left-border.right, x);
  26         create_coords(0.0f-shadow.bottom, ht+shadow.top, border.bottom, border.top, slice.h-border.bottom-border.top, y);
  27
  28         vector<float> u, v;
  29         create_texcoords(slice.x, slice.x+slice.w, border.left, border.right, texture->get_width(), u);
  30         create_texcoords(slice.y, slice.y+slice.h, border.bottom, border.top, texture->get_height(), v);
  31
  32         unsigned xmin=border.left ? 0 : 1;
  33         unsigned xmax=x.size()-(border.right ? 2 : 3);
  34         unsigned ymin=border.bottom ? 0 : 1;
  35         unsigned ymax=y.size()-(border.top ? 2 : 3);
  36
  37         texture->bind();
  38         GL::Immediate imm((GL::COLOR4_UBYTE, GL::TEXCOORD2, GL::VERTEX2));
  39         imm.color(1.0f, 1.0f, 1.0f);
  40         imm.begin(GL::QUADS);
  41         for(unsigned i=ymin; i<=ymax; ++i)
  42         {
  43                 unsigned i2=(i==0 ? 0 : i==y.size()-2 ? 2 : 1);
  44                 for(unsigned j=xmin; j<=xmax; ++j)
  45                 {
  46                         unsigned j2=(j==0 ? 0 : j==x.size()-2 ? 2 : 1);
  47                         imm.texcoord(u[j2], v[i2]);
  48                         imm.vertex(x[j], y[i]);
  49                         imm.texcoord(u[j2+1], v[i2]);
  50                         imm.vertex(x[j+1], y[i]);
  51                         imm.texcoord(u[j2+1], v[i2+1]);
  52                         imm.vertex(x[j+1], y[i+1]);
  53                         imm.texcoord(u[j2], v[i2+1]);
  54                         imm.vertex(x[j], y[i+1]);
  55                 }
  56         }
  57         imm.end();
  58 }
  59
  60 void Graphic::create_coords(float low, float high, float brd1, float brd2, float block, vector<float> &coords) const
  61 {
  62         coords.push_back(low);
  63         coords.push_back(low+brd1);
  64         if(repeat)
  65         {
  66                 float space=high-low-brd1-brd2;
  67                 unsigned div=max(static_cast<unsigned>(space/block), 1U);
  68                 float delta=space/div;
  69                 for(unsigned i=1; i<div; ++i)
  70                         coords.push_back(low+brd1+delta*i);
  71         }
  72         coords.push_back(high-brd2);
  73         coords.push_back(high);
  74 }
  75
  76 void Graphic::create_texcoords(float low, float high, float brd1, float brd2, float scale, vector<float> &coords) const
  77 {
  78         coords.push_back(low/scale);
  79         coords.push_back((low+brd1)/scale);
  80         coords.push_back((high-brd2)/scale);
  81         coords.push_back(high/scale);
  82 }
  83
  84
  85 Graphic::Loader::Loader(Graphic &g, Resources &r):
  86         graph(g),
  87         res(r)
  88 {
  89         add("texture", &Loader::texture);
  90         add("slice",   &Loader::slice);
  91         add("border",  &Loader::border);
  92         add("repeat",  &Graphic::repeat);
  93         add("shadow",  &Loader::shadow);
  94 }
  95
  96 void Graphic::Loader::texture(const string &n)
  97 {
  98         graph.texture=res.get<GL::Texture2D>(n);
  99         graph.slice=Geometry(0, 0, graph.texture->get_width(), graph.texture->get_height());
 100 }
 101
 102 void Graphic::Loader::slice(unsigned x, unsigned y, unsigned w, unsigned h)
 103 {
 104         graph.slice=Geometry(x, y, w, h);
 105 }
 106
 107 void Graphic::Loader::border()
 108 {
 109         load_sub(graph.border);
 110 }
 111
 112 void Graphic::Loader::shadow()
 113 {
 114         load_sub(graph.shadow);
 115 }
 116
 117 } // namespace GLtk
 118 } // namespace Msp