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// shader handling
// Author: Supakorn "Jamie" Rassameemasmuang
#include <fstream>
#include <sstream>
#include <vector>
#include <string>
#include <unordered_set>
#include <iostream>
#include "common.h"
#ifdef HAVE_GL
#include "shaders.h"
GLuint createShaders(GLchar const* src, int shaderType)
{
GLuint shader = glCreateShader(shaderType);
glShaderSource(shader, 1, &src, nullptr);
glCompileShader(shader);
GLint status;
glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
if (status != GL_TRUE)
{
GLint length;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &length);
std::vector<GLchar> msg(length);
glGetShaderInfoLog(shader, length, &length, msg.data());
for(GLchar const& cha : msg)
{
std::cerr << cha;
}
std::cerr << std::endl << "GL Compile error" << std::endl;
std::cerr << src << std::endl;
throw 1;
}
return shader;
}
GLuint createShaderFile(std::string file, int shaderType, size_t Nlights,
size_t Nmaterials, bool explicitcolor)
{
std::ifstream shaderFile;
shaderFile.open(file);
std::stringstream shaderSrc;
shaderSrc << "#version 130" << "\r\n";
shaderSrc << "#extension GL_ARB_uniform_buffer_object : enable"
<< "\r\n";
shaderSrc << "#extension GL_ARB_shading_language_packing : enable"
<< "\r\n";
if(explicitcolor)
shaderSrc << "#define EXPLICIT_COLOR" << "\r\n";
shaderSrc << "const int Nlights=" << Nlights << ";\r\n";
shaderSrc << "const int Nmaterials=" << Nmaterials << ";\r\n";
if (shaderFile)
{
shaderSrc << shaderFile.rdbuf();
shaderFile.close();
}
else
{
throw 1;
}
return createShaders(shaderSrc.str().data(), shaderType);
}
#endif
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