Subversion Repositories gelsvn

Rev

Rev 601 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
594 jab 1 
/* ----------------------------------------------------------------------- *
2 
 * This file is part of GEL, http://www.imm.dtu.dk/GEL
3 
 * Copyright (C) the authors and DTU Informatics
4 
 * For license and list of authors, see ../../doc/intro.pdf
5 
 * ----------------------------------------------------------------------- */
6 
 
369 jab 7 
#include <iostream>
8 
#include <fstream>
9 
#include <string>
601 jab 10 
#include "../GL/glew.h"
11 
#include "../GLGraphics/gel_glu.h"
369 jab 12 
using namespace std;
13 
 
373 jrf 14 
namespace GLGraphics
369 jab 15 
{
502 jrf 16 
  void print_glsl_program_log(GLuint program)
373 jrf 17 
  {
502 jrf 18 
    GLint infoLog_length = 0;
19 
    glGetProgramiv(program, GL_INFO_LOG_LENGTH, &infoLog_length);
20 
 
503 jrf 21 
    // Some drivers return 1 as infoLog_length when the infoLog is an empty string
502 jrf 22 
    if(infoLog_length > 1)
23 
    {
24 
      char* infoLog = new char[infoLog_length];
25 
      glGetProgramInfoLog(program, infoLog_length, 0, infoLog);
26 
      cerr << "InfoLog:" << endl << infoLog << endl << endl;
27 
      delete [] infoLog;
28 
    }
373 jrf 29 
  }
369 jab 30 
 
502 jrf 31 
  void print_glsl_shader_log(GLuint shader)
32 
  {
33 
    GLint infoLog_length = 0;
34 
    glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLog_length);
35 
 
503 jrf 36 
    // Some drivers return 1 as infoLog_length when the infoLog is an empty string
502 jrf 37 
    if(infoLog_length > 1)
38 
    {
39 
      char* infoLog = new char[infoLog_length];
40 
      glGetShaderInfoLog(shader, infoLog_length, 0, infoLog);
41 
      cerr << "InfoLog:" << endl << infoLog << endl << endl;
42 
      delete [] infoLog;
43 
    }
44 
  }
45 
 
46 
  bool check_glsl_shader(GLuint shader)
47 
  {
48 
    GLint status;
49 
    glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
50 
    return status == GL_TRUE;
51 
  }
52 
 
373 jrf 53 
  const std::string read_glsl_source(const std::string& path, const std::string& file)
54 
  {
502 jrf 55 
    string fullpath = path + "/" + file;
56 
    ifstream is(fullpath.c_str(), ios::binary);
57 
    string str, contents;
58 
    while(getline(is,str))
59 
    {
60 
      contents += str;
61 
      contents += "\n";
62 
    }
63 
    return contents;
373 jrf 64 
  }
369 jab 65 
 
502 jrf 66 
  GLuint create_glsl_shader(GLuint stype, const std::string& src, bool print_log)
373 jrf 67 
  {
502 jrf 68 
    GLuint S = glCreateShader(stype);
69 
    const GLchar* src_cstr = src.c_str();
70 
    glShaderSource(S, 1, &src_cstr, 0);
71 
    glCompileShader(S);
72 
 
73 
    if(print_log && !check_glsl_shader(S))
74 
    {
75 
      print_glsl_shader_log(S);
76 
      glDeleteShader(S);
77 
      return 0;
78 
    }
79 
    return S;
373 jrf 80 
  }
369 jab 81 
 
373 jrf 82 
  GLuint create_glsl_shader(GLuint stype, const std::string& path, const std::string& file)
83 
  {
502 jrf 84 
    string str = read_glsl_source(path, file);
85 
    if(!str.empty())
86 
    {
87 
      GLuint shader = create_glsl_shader(stype, str, false);
88 
      if(!check_glsl_shader(shader))
89 
      {
90 
        cerr << path << file << endl;
91 
        print_glsl_shader_log(shader);
92 
        glDeleteShader(shader);
93 
        return 0;
94 
      }
95 
      return shader;
96 
    }
97 
    return 0;
373 jrf 98 
  }
369 jab 99 
}